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gtk2/gdk/x11/gdkglcontext-x11.c

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gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
/* GDK - The GIMP Drawing Kit
*
* gdkglcontext-x11.c: X11 specific OpenGL wrappers
*
* Copyright © 2014 Emmanuele Bassi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gdkglcontext-x11.h"
#include "gdkdisplay-x11.h"
#include "gdkscreen-x11.h"
#include "gdkx11display.h"
#include "gdkx11glcontext.h"
#include "gdkx11screen.h"
#include "gdkx11window.h"
#include "gdkx11visual.h"
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
#include "gdkvisualprivate.h"
Cache default gdk visuals in the GDK_VISUALS property on the root window This means we don't have to try to initialize opengl in every gtk instance that is stated. It will only happen for the first one. https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-29 12:33:08 +00:00
#include "gdkx11property.h"
#include <X11/Xatom.h>
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
#include "gdkinternals.h"
#include "gdkintl.h"
#include <cairo/cairo-xlib.h>
gdkglcontext-x11: Use epoxy/glx.h rather then GL/glx.h
2014-10-22 18:37:58 +00:00
#include <epoxy/glx.h>
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
G_DEFINE_TYPE (GdkX11GLContext, gdk_x11_gl_context, GDK_TYPE_GL_CONTEXT)
typedef struct {
GdkDisplay *display;
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
GLXDrawable glx_drawable;
Window dummy_xwin;
GLXWindow dummy_glx;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
guint32 last_frame_counter;
} DrawableInfo;
static void
drawable_info_free (gpointer data_)
{
DrawableInfo *data = data_;
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
Display *dpy;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
gdk_x11_display_error_trap_push (data->display);
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
dpy = gdk_x11_display_get_xdisplay (data->display);
if (data->glx_drawable)
glXDestroyWindow (dpy, data->glx_drawable);
if (data->dummy_glx)
glXDestroyWindow (dpy, data->dummy_glx);
if (data->dummy_xwin)
XDestroyWindow (dpy, data->dummy_xwin);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
gdk_x11_display_error_trap_pop_ignored (data->display);
g_slice_free (DrawableInfo, data);
}
static DrawableInfo *
get_glx_drawable_info (GdkWindow *window)
{
return g_object_get_data (G_OBJECT (window), "-gdk-x11-window-glx-info");
}
static void
set_glx_drawable_info (GdkWindow *window,
DrawableInfo *info)
{
g_object_set_data_full (G_OBJECT (window), "-gdk-x11-window-glx-info",
info,
drawable_info_free);
}
static void
maybe_wait_for_vblank (GdkDisplay *display,
GLXDrawable drawable)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
Display *dpy = gdk_x11_display_get_xdisplay (display);
if (display_x11->has_glx_sync_control)
{
gint64 ust, msc, sbc;
glXGetSyncValuesOML (dpy, drawable, &ust, &msc, &sbc);
glXWaitForMscOML (dpy, drawable,
0, 2, (msc + 1) % 2,
&ust, &msc, &sbc);
}
else if (display_x11->has_glx_video_sync)
{
guint32 current_count;
glXGetVideoSyncSGI (&current_count);
glXWaitVideoSyncSGI (2, (current_count + 1) % 2, &current_count);
}
}
void
gdk_x11_window_invalidate_for_new_frame (GdkWindow *window,
cairo_region_t *update_area)
{
cairo_rectangle_int_t window_rect;
GdkDisplay *display = gdk_window_get_display (window);
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
Display *dpy = gdk_x11_display_get_xdisplay (display);
GdkX11GLContext *context_x11;
unsigned int buffer_age;
gboolean invalidate_all;
/* Minimal update is ok if we're not drawing with gl */
if (window->gl_paint_context == NULL)
return;
context_x11 = GDK_X11_GL_CONTEXT (window->gl_paint_context);
buffer_age = 0;
GdkX11GLContext: Use bitblit for swap if no buffer age support If buffer age is undefined and the updated area is not the whole window then we use bit-blits instead of swap-buffers to end the frame. This allows us to not repaint the entire window unnecessarily if buffer_age is not supported, like e.g. with DRI2.
2014-11-06 11:21:28 +00:00
context_x11->do_blit_swap = FALSE;
gl: Make gdk_gl_context_make_current() return void Its not really reasonable to handle failures to make_current, it basically only happens if you pass invalid arguments to it, and thats not something we trap on similar things on the X drawing side. If GL is not supported that should be handled by the context creation failing, and anything going wrong after that is essentially a critical (or an async X error).
2014-10-09 15:24:21 +00:00
if (display_x11->has_glx_buffer_age)
{
gdk_gl_context_make_current (window->gl_paint_context);
glXQueryDrawable(dpy, context_x11->drawable,
GLX_BACK_BUFFER_AGE_EXT, &buffer_age);
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkX11GLContext: Use bitblit for swap if no buffer age support If buffer age is undefined and the updated area is not the whole window then we use bit-blits instead of swap-buffers to end the frame. This allows us to not repaint the entire window unnecessarily if buffer_age is not supported, like e.g. with DRI2.
2014-11-06 11:21:28 +00:00
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
invalidate_all = FALSE;
if (buffer_age == 0 || buffer_age >= 4)
GdkX11GLContext: Use bitblit for swap if no buffer age support If buffer age is undefined and the updated area is not the whole window then we use bit-blits instead of swap-buffers to end the frame. This allows us to not repaint the entire window unnecessarily if buffer_age is not supported, like e.g. with DRI2.
2014-11-06 11:21:28 +00:00
{
cairo_rectangle_int_t whole_window = { 0, 0, gdk_window_get_width (window), gdk_window_get_height (window) };
if (gdk_gl_context_has_framebuffer_blit (window->gl_paint_context) &&
cairo_region_contains_rectangle (update_area, &whole_window) != CAIRO_REGION_OVERLAP_IN)
{
context_x11->do_blit_swap = TRUE;
}
else
invalidate_all = TRUE;
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
else
{
if (buffer_age >= 2)
{
if (window->old_updated_area[0])
cairo_region_union (update_area, window->old_updated_area[0]);
else
invalidate_all = TRUE;
}
if (buffer_age >= 3)
{
if (window->old_updated_area[1])
cairo_region_union (update_area, window->old_updated_area[1]);
else
invalidate_all = TRUE;
}
}
if (invalidate_all)
{
window_rect.x = 0;
window_rect.y = 0;
window_rect.width = gdk_window_get_width (window);
window_rect.height = gdk_window_get_height (window);
/* If nothing else is known, repaint everything so that the back
buffer is fully up-to-date for the swapbuffer */
cairo_region_union_rectangle (update_area, &window_rect);
}
}
GdkX11GLContext: Use bitblit for swap if no buffer age support If buffer age is undefined and the updated area is not the whole window then we use bit-blits instead of swap-buffers to end the frame. This allows us to not repaint the entire window unnecessarily if buffer_age is not supported, like e.g. with DRI2.
2014-11-06 11:21:28 +00:00
static void
gdk_gl_blit_region (GdkWindow *window, cairo_region_t *region)
{
int n_rects, i;
int scale = gdk_window_get_scale_factor (window);
int wh = gdk_window_get_height (window);
cairo_rectangle_int_t rect;
n_rects = cairo_region_num_rectangles (region);
for (i = 0; i < n_rects; i++)
{
cairo_region_get_rectangle (region, i, &rect);
glScissor (rect.x * scale, (wh - rect.y - rect.height) * scale, rect.width * scale, rect.height * scale);
glBlitFramebuffer (rect.x * scale, (wh - rect.y - rect.height) * scale, (rect.x + rect.width) * scale, (wh - rect.y) * scale,
rect.x * scale, (wh - rect.y - rect.height) * scale, (rect.x + rect.width) * scale, (wh - rect.y) * scale,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
}
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
static void
Rename gdk_gl_context_flush_buffer to gdk_gl_context_end_frame This makes a lot more sense.
2014-10-27 15:33:37 +00:00
gdk_x11_gl_context_end_frame (GdkGLContext *context,
cairo_region_t *painted,
cairo_region_t *damage)
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
GdkX11GLContext *context_x11 = GDK_X11_GL_CONTEXT (context);
GdkWindow *window = gdk_gl_context_get_window (context);
GdkGLContext: Add display property We need to use this in the code path where we make the context non-current during destroy, because at that point the window could be destroyed and gdk_window_get_display() would return NULL.
2014-11-03 12:20:55 +00:00
GdkDisplay *display = gdk_gl_context_get_display (context);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
Display *dpy = gdk_x11_display_get_xdisplay (display);
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
DrawableInfo *info;
GLXDrawable drawable;
gdk_gl_context_make_current (context);
info = get_glx_drawable_info (window);
drawable = context_x11->drawable;
GDK_NOTE (OPENGL,
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
g_message ("Flushing GLX buffers for drawable %lu (window: %lu), frame sync: %s",
(unsigned long) drawable,
(unsigned long) gdk_x11_window_get_xid (window),
context_x11->do_frame_sync ? "yes" : "no"));
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
/* if we are going to wait for the vertical refresh manually
* we need to flush pending redraws, and we also need to wait
* for that to finish, otherwise we are going to tear.
*
* obviously, this condition should not be hit if we have
* GLX_SGI_swap_control, and we ask the driver to do the right
* thing.
*/
if (context_x11->do_frame_sync)
{
guint32 end_frame_counter = 0;
gboolean has_counter = display_x11->has_glx_video_sync;
gboolean can_wait = display_x11->has_glx_video_sync || display_x11->has_glx_sync_control;
if (display_x11->has_glx_video_sync)
glXGetVideoSyncSGI (&end_frame_counter);
if (context_x11->do_frame_sync && !display_x11->has_glx_swap_interval)
{
glFinish ();
if (has_counter && can_wait)
{
guint32 last_counter = info != NULL ? info->last_frame_counter : 0;
if (last_counter == end_frame_counter)
maybe_wait_for_vblank (display, drawable);
}
else if (can_wait)
maybe_wait_for_vblank (display, drawable);
}
}
GdkX11GLContext: Use bitblit for swap if no buffer age support If buffer age is undefined and the updated area is not the whole window then we use bit-blits instead of swap-buffers to end the frame. This allows us to not repaint the entire window unnecessarily if buffer_age is not supported, like e.g. with DRI2.
2014-11-06 11:21:28 +00:00
if (context_x11->do_blit_swap)
{
glDrawBuffer(GL_FRONT);
glReadBuffer(GL_BACK);
gdk_gl_blit_region (window, painted);
glDrawBuffer(GL_BACK);
glFlush();
if (gdk_gl_context_has_frame_terminator (context))
glFrameTerminatorGREMEDY ();
}
else
glXSwapBuffers (dpy, drawable);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
if (context_x11->do_frame_sync && info != NULL && display_x11->has_glx_video_sync)
glXGetVideoSyncSGI (&info->last_frame_counter);
}
typedef struct {
Display *display;
GLXDrawable drawable;
gboolean y_inverted;
} GdkGLXPixmap;
static void
glx_pixmap_destroy (void *data)
{
GdkGLXPixmap *glx_pixmap = data;
glXDestroyPixmap (glx_pixmap->display, glx_pixmap->drawable);
g_slice_free (GdkGLXPixmap, glx_pixmap);
}
static GdkGLXPixmap *
GdkGL: Fix up GL_ARB_texture_rectangle support This broke when gdk_gl_texture_quad moved to shaders. We need a specialized shader for the rectangle case.
2014-11-06 10:31:01 +00:00
glx_pixmap_get (cairo_surface_t *surface, guint texture_target)
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
Display *display = cairo_xlib_surface_get_display (surface);
Screen *screen = cairo_xlib_surface_get_screen (surface);
x11/gl: Fix use after free https://bugzilla.gnome.org/show_bug.cgi?id=747305 Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
2015-04-03 15:51:57 +00:00
Visual *visual = cairo_xlib_surface_get_visual (surface);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkGLXPixmap *glx_pixmap;
x11/gl: Fix use after free https://bugzilla.gnome.org/show_bug.cgi?id=747305 Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
2015-04-03 15:51:57 +00:00
GLXFBConfig *fbconfigs, config;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
int nfbconfigs;
XVisualInfo *visinfo;
Plug some memory leaks in GL support valgrind pointed these out.
2014-10-28 20:06:42 +00:00
VisualID visualid;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
int i, value;
gboolean y_inverted;
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
gboolean with_alpha;
guint target = 0;
guint format = 0;
int pixmap_attributes[] = {
GLX_TEXTURE_TARGET_EXT, 0,
GLX_TEXTURE_FORMAT_EXT, 0,
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
None
};
gdk: fix crash if visual is NULL cairo_xlib_surface_get_visual might return NULL so we need to check for NULL before trying to use it. https://bugzilla.gnome.org/show_bug.cgi?id=752520
2015-07-17 07:31:32 +00:00
if (visual == NULL)
return NULL;
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
with_alpha = cairo_surface_get_content (surface) == CAIRO_CONTENT_COLOR_ALPHA;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
y_inverted = FALSE;
fbconfigs = glXGetFBConfigs (display, XScreenNumberOfScreen (screen), &nfbconfigs);
for (i = 0; i < nfbconfigs; i++)
{
visinfo = glXGetVisualFromFBConfig (display, fbconfigs[i]);
Plug some memory leaks in GL support valgrind pointed these out.
2014-10-28 20:06:42 +00:00
if (!visinfo)
continue;
visualid = visinfo->visualid;
XFree (visinfo);
if (visualid != XVisualIDFromVisual (visual))
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
continue;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
glXGetFBConfigAttrib (display, fbconfigs[i], GLX_DRAWABLE_TYPE, &value);
if (!(value & GLX_PIXMAP_BIT))
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
continue;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
glXGetFBConfigAttrib (display, fbconfigs[i],
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
GLX_BIND_TO_TEXTURE_TARGETS_EXT,
&value);
GdkGL: Fix up GL_ARB_texture_rectangle support This broke when gdk_gl_texture_quad moved to shaders. We need a specialized shader for the rectangle case.
2014-11-06 10:31:01 +00:00
if (texture_target == GL_TEXTURE_2D)
{
if (value & GLX_TEXTURE_2D_BIT_EXT)
target = GLX_TEXTURE_2D_EXT;
else
continue;
}
else if (texture_target == GL_TEXTURE_RECTANGLE_ARB)
{
if (value & GLX_TEXTURE_RECTANGLE_BIT_EXT)
target = GLX_TEXTURE_RECTANGLE_EXT;
else
continue;
}
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
else
GdkGL: Fix up GL_ARB_texture_rectangle support This broke when gdk_gl_texture_quad moved to shaders. We need a specialized shader for the rectangle case.
2014-11-06 10:31:01 +00:00
continue;
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
if (!with_alpha)
{
glXGetFBConfigAttrib (display, fbconfigs[i],
GLX_BIND_TO_TEXTURE_RGB_EXT,
&value);
if (!value)
continue;
format = GLX_TEXTURE_FORMAT_RGB_EXT;
}
else
{
glXGetFBConfigAttrib (display, fbconfigs[i],
GLX_BIND_TO_TEXTURE_RGBA_EXT,
&value);
if (!value)
continue;
Plug some memory leaks in GL support valgrind pointed these out.
2014-10-28 20:06:42 +00:00
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
format = GLX_TEXTURE_FORMAT_RGBA_EXT;
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
glXGetFBConfigAttrib (display, fbconfigs[i],
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
GLX_Y_INVERTED_EXT,
&value);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
if (value == TRUE)
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
y_inverted = TRUE;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
x11/gl: Fix use after free https://bugzilla.gnome.org/show_bug.cgi?id=747305 Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
2015-04-03 15:51:57 +00:00
config = fbconfigs[i];
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
break;
}
Plug some memory leaks in GL support valgrind pointed these out.
2014-10-28 20:06:42 +00:00
XFree (fbconfigs);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
if (i == nfbconfigs)
return NULL;
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
pixmap_attributes[1] = target;
pixmap_attributes[3] = format;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
glx_pixmap = g_slice_new0 (GdkGLXPixmap);
glx_pixmap->y_inverted = y_inverted;
glx_pixmap->display = display;
x11/gl: Fix use after free https://bugzilla.gnome.org/show_bug.cgi?id=747305 Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
2015-04-03 15:51:57 +00:00
glx_pixmap->drawable = glXCreatePixmap (display, config,
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
cairo_xlib_surface_get_drawable (surface),
pixmap_attributes);
return glx_pixmap;
}
static gboolean
GdkGLContextX11: Use passed in context, not get_current()
2014-11-06 08:10:34 +00:00
gdk_x11_gl_context_texture_from_surface (GdkGLContext *paint_context,
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
cairo_surface_t *surface,
cairo_region_t *region)
{
GdkGLXPixmap *glx_pixmap;
double device_x_offset, device_y_offset;
cairo_rectangle_int_t rect;
int n_rects, i;
GdkWindow *window;
gdk: Fix scissoring with scaled windows Make sure the window scale is always taken into acount when setting up the scissor regions.
2014-12-15 21:31:48 +00:00
int unscaled_window_height;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
int window_scale;
unsigned int texture_id;
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
gboolean use_texture_rectangle;
guint target;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
double sx, sy;
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
float uscale, vscale;
gdkgl: Texture many quads at once for performance reasons This isn't fully performant yet. To be fully performant, we'd need to do everything in one giant buffer.
2014-11-22 17:47:35 +00:00
GdkTexturedQuad *quads;
x11/gl: Do not use GLX_EXT_texture_from_pixmap if not available If the GLX_EXT_texture_from_pixmap extension is not available when we did the extensions check, then there's no point in using the backend specific code paths that rely on it.
2015-03-26 17:26:29 +00:00
GdkX11Display *display_x11;
display_x11 = GDK_X11_DISPLAY (gdk_gl_context_get_display (paint_context));
if (!display_x11->has_glx_texture_from_pixmap)
return FALSE;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
if (cairo_surface_get_type (surface) != CAIRO_SURFACE_TYPE_XLIB)
return FALSE;
GdkGL: Fix up GL_ARB_texture_rectangle support This broke when gdk_gl_texture_quad moved to shaders. We need a specialized shader for the rectangle case.
2014-11-06 10:31:01 +00:00
use_texture_rectangle = gdk_gl_context_use_texture_rectangle (paint_context);
if (use_texture_rectangle)
target = GL_TEXTURE_RECTANGLE_ARB;
else
target = GL_TEXTURE_2D;
glx_pixmap = glx_pixmap_get (surface, target);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
if (glx_pixmap == NULL)
return FALSE;
gl: Use a uniform to flip R and B colors on GLES This allows us to decide when the R and B color channels should be flipped with a much better granularity. For instance, when using GLX_EXT_texture_from_pixmap to create a GL texture from a surface we don't need to swap the R and B channels, as the internal representation of the texture data will already have the appropriate colors. We also don't need to flip color channels when blitting from a texture.
2016-04-25 12:38:22 +00:00
GDK_NOTE (OPENGL, g_message ("Using GLX_EXT_texture_from_pixmap to draw surface"));
GdkGLContextX11: Use passed in context, not get_current()
2014-11-06 08:10:34 +00:00
window = gdk_gl_context_get_window (paint_context)->impl_window;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
window_scale = gdk_window_get_scale_factor (window);
gdk: Fix scissoring with scaled windows Make sure the window scale is always taken into acount when setting up the scissor regions.
2014-12-15 21:31:48 +00:00
gdk_window_get_unscaled_size (window, NULL, &unscaled_window_height);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
sx = sy = 1;
cairo_surface_get_device_scale (window->current_paint.surface, &sx, &sy);
gl: Use a uniform to flip R and B colors on GLES This allows us to decide when the R and B color channels should be flipped with a much better granularity. For instance, when using GLX_EXT_texture_from_pixmap to create a GL texture from a surface we don't need to swap the R and B channels, as the internal representation of the texture data will already have the appropriate colors. We also don't need to flip color channels when blitting from a texture.
2016-04-25 12:38:22 +00:00
cairo_surface_get_device_offset (surface, &device_x_offset, &device_y_offset);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
/* Ensure all the X stuff are synced before we read it back via texture-from-pixmap */
glXWaitX();
glGenTextures (1, &texture_id);
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
glBindTexture (target, texture_id);
x11/gl: Do not call glEnable/glDisable with GL_TEXTURE_2D These are fixed pipeline functions, and Mesa will warn (if debugging messages are enabled). At best, they are poinless calls.
2015-03-23 22:03:00 +00:00
GdkGL: Fix up GL_ARB_texture_rectangle support This broke when gdk_gl_texture_quad moved to shaders. We need a specialized shader for the rectangle case.
2014-11-06 10:31:01 +00:00
glTexParameteri (target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri (target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri (target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
glXBindTexImageEXT (glx_pixmap->display, glx_pixmap->drawable,
GLX_FRONT_LEFT_EXT, NULL);
gdkglcontext-x11: Make sure to enable the scissor test
2014-11-22 18:01:51 +00:00
glEnable (GL_SCISSOR_TEST);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
n_rects = cairo_region_num_rectangles (region);
gdkgl: Texture many quads at once for performance reasons This isn't fully performant yet. To be fully performant, we'd need to do everything in one giant buffer.
2014-11-22 17:47:35 +00:00
quads = g_new (GdkTexturedQuad, n_rects);
gdk: Fix scissoring with scaled windows Make sure the window scale is always taken into acount when setting up the scissor regions.
2014-12-15 21:31:48 +00:00
#define FLIP_Y(_y) (unscaled_window_height - (_y))
gdkgl: Texture many quads at once for performance reasons This isn't fully performant yet. To be fully performant, we'd need to do everything in one giant buffer.
2014-11-22 17:47:35 +00:00
cairo_region_get_extents (region, &rect);
gdk: Fix scissoring with scaled windows Make sure the window scale is always taken into acount when setting up the scissor regions.
2014-12-15 21:31:48 +00:00
glScissor (rect.x * window_scale, FLIP_Y((rect.y + rect.height) * window_scale),
rect.width * window_scale, rect.height * window_scale);
gdkgl: Texture many quads at once for performance reasons This isn't fully performant yet. To be fully performant, we'd need to do everything in one giant buffer.
2014-11-22 17:47:35 +00:00
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
for (i = 0; i < n_rects; i++)
{
int src_x, src_y, src_height, src_width;
cairo_region_get_rectangle (region, i, &rect);
src_x = rect.x * sx + device_x_offset;
src_y = rect.y * sy + device_y_offset;
src_width = rect.width * sx;
src_height = rect.height * sy;
opengl: Use GL_TEXTURE_2D rather than GL_TEXTURE_RECTANGLE_ARB when possible This is more standard, and most driver support non-power-of-2 TEXTURE_2D these days. We fall back for ancient drivers.
2014-10-27 20:15:37 +00:00
if (use_texture_rectangle)
{
uscale = 1.0;
vscale = 1.0;
}
else
{
uscale = 1.0 / cairo_xlib_surface_get_width (surface);
vscale = 1.0 / cairo_xlib_surface_get_height (surface);
}
gdkgl: Use a GdkTexturedQuad struct to paint quads We'll soon have a new function that paints multiple quads.
2014-11-22 17:39:18 +00:00
{
GdkTexturedQuad quad = {
gdk: Fix scissoring with scaled windows Make sure the window scale is always taken into acount when setting up the scissor regions.
2014-12-15 21:31:48 +00:00
rect.x * window_scale, FLIP_Y(rect.y * window_scale),
(rect.x + rect.width) * window_scale, FLIP_Y((rect.y + rect.height) * window_scale),
gdkgl: Use a GdkTexturedQuad struct to paint quads We'll soon have a new function that paints multiple quads.
2014-11-22 17:39:18 +00:00
uscale * src_x, vscale * src_y,
uscale * (src_x + src_width), vscale * (src_y + src_height),
};
gdkgl: Texture many quads at once for performance reasons This isn't fully performant yet. To be fully performant, we'd need to do everything in one giant buffer.
2014-11-22 17:47:35 +00:00
quads[i] = quad;
gdkgl: Use a GdkTexturedQuad struct to paint quads We'll soon have a new function that paints multiple quads.
2014-11-22 17:39:18 +00:00
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
}
gdkgl: Texture many quads at once for performance reasons This isn't fully performant yet. To be fully performant, we'd need to do everything in one giant buffer.
2014-11-22 17:47:35 +00:00
#undef FLIP_Y
gl: Use a uniform to flip R and B colors on GLES This allows us to decide when the R and B color channels should be flipped with a much better granularity. For instance, when using GLX_EXT_texture_from_pixmap to create a GL texture from a surface we don't need to swap the R and B channels, as the internal representation of the texture data will already have the appropriate colors. We also don't need to flip color channels when blitting from a texture.
2016-04-25 12:38:22 +00:00
gdk_gl_texture_quads (paint_context, target, n_rects, quads, FALSE);
gdkgl: Texture many quads at once for performance reasons This isn't fully performant yet. To be fully performant, we'd need to do everything in one giant buffer.
2014-11-22 17:47:35 +00:00
g_free (quads);
gdk: Fix scissoring with scaled windows Make sure the window scale is always taken into acount when setting up the scissor regions.
2014-12-15 21:31:48 +00:00
glDisable (GL_SCISSOR_TEST);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
glXReleaseTexImageEXT (glx_pixmap->display, glx_pixmap->drawable,
GLX_FRONT_LEFT_EXT);
glDeleteTextures (1, &texture_id);
glx_pixmap_destroy(glx_pixmap);
return TRUE;
}
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
static XVisualInfo *
find_xvisinfo_for_fbconfig (GdkDisplay *display,
GLXFBConfig config)
{
Display *dpy = gdk_x11_display_get_xdisplay (display);
return glXGetVisualFromFBConfig (dpy, config);
}
static GLXContext
create_gl3_context (GdkDisplay *display,
GLXFBConfig config,
x11/gl: Use the GdkGLContext options When creating an OpenGL context using the glXCreateContextAttribs() function. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-28 09:40:34 +00:00
GdkGLContext *share,
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
int profile,
x11/gl: Use the GdkGLContext options When creating an OpenGL context using the glXCreateContextAttribs() function. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-28 09:40:34 +00:00
int flags,
int major,
int minor)
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
{
x11/gl: Use the GdkGLContext options When creating an OpenGL context using the glXCreateContextAttribs() function. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-28 09:40:34 +00:00
int attrib_list[] = {
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
GLX_CONTEXT_PROFILE_MASK_ARB, profile,
x11/gl: Use the GdkGLContext options When creating an OpenGL context using the glXCreateContextAttribs() function. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-28 09:40:34 +00:00
GLX_CONTEXT_MAJOR_VERSION_ARB, major,
GLX_CONTEXT_MINOR_VERSION_ARB, minor,
GLX_CONTEXT_FLAGS_ARB, flags,
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
None,
};
x11/gl: Trap GL context creation Avoid an X11 error in case the context creation fails, so we can avoid a crash and pick it up in the upper layers, and display an error. https://bugzilla.gnome.org/show_bug.cgi?id=746746
2015-03-25 14:34:42 +00:00
GLXContext res;
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
x11/gl: Use the GdkGLContext options When creating an OpenGL context using the glXCreateContextAttribs() function. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-28 09:40:34 +00:00
GdkX11GLContext *share_x11 = NULL;
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
if (share != NULL)
x11/gl: Use the GdkGLContext options When creating an OpenGL context using the glXCreateContextAttribs() function. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-28 09:40:34 +00:00
share_x11 = GDK_X11_GL_CONTEXT (share);
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
x11/gl: Trap GL context creation Avoid an X11 error in case the context creation fails, so we can avoid a crash and pick it up in the upper layers, and display an error. https://bugzilla.gnome.org/show_bug.cgi?id=746746
2015-03-25 14:34:42 +00:00
gdk_x11_display_error_trap_push (display);
res = glXCreateContextAttribsARB (gdk_x11_display_get_xdisplay (display),
config,
share_x11 != NULL ? share_x11->glx_context : NULL,
True,
attrib_list);
if (gdk_x11_display_error_trap_pop (display))
return NULL;
return res;
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
}
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
static GLXContext
create_legacy_context (GdkDisplay *display,
GLXFBConfig config,
GdkGLContext *share)
{
GdkX11GLContext *share_x11 = NULL;
GLXContext res;
if (share != NULL)
share_x11 = GDK_X11_GL_CONTEXT (share);
gdk_x11_display_error_trap_push (display);
res = glXCreateNewContext (gdk_x11_display_get_xdisplay (display),
config,
GLX_RGBA_TYPE,
share_x11 != NULL ? share_x11->glx_context : NULL,
TRUE);
if (gdk_x11_display_error_trap_pop (display))
return NULL;
return res;
}
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
static gboolean
gdk_x11_gl_context_realize (GdkGLContext *context,
GError **error)
{
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
GdkX11Display *display_x11;
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
GdkDisplay *display;
GdkX11GLContext *context_x11;
GLXWindow drawable;
XVisualInfo *xvisinfo;
Display *dpy;
DrawableInfo *info;
GdkGLContext *share;
GdkWindow *window;
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
gboolean debug_bit, compat_bit, legacy_bit, es_bit;
Remove GdkGLProfile The existence of OpenGL implementations that do not provide the full core profile compatibility because of reasons beyond the technical, like llvmpipe not implementing floating point buffers, makes the existence of GdkGLProfile and documenting the fact that we use core profiles a bit harder. Since we do not have any existing profile except the default, we can remove the GdkGLProfile and its related API from GDK and GTK+, and sweep the whole thing under the carpet, while we wait for an extension that lets us ask for the most compatible profile possible. https://bugzilla.gnome.org/show_bug.cgi?id=744407
2015-02-12 17:30:42 +00:00
int major, minor, flags;
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
window = gdk_gl_context_get_window (context);
display = gdk_window_get_display (window);
dpy = gdk_x11_display_get_xdisplay (display);
context_x11 = GDK_X11_GL_CONTEXT (context);
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
display_x11 = GDK_X11_DISPLAY (display);
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
share = gdk_gl_context_get_shared_context (context);
Remove GdkGLProfile The existence of OpenGL implementations that do not provide the full core profile compatibility because of reasons beyond the technical, like llvmpipe not implementing floating point buffers, makes the existence of GdkGLProfile and documenting the fact that we use core profiles a bit harder. Since we do not have any existing profile except the default, we can remove the GdkGLProfile and its related API from GDK and GTK+, and sweep the whole thing under the carpet, while we wait for an extension that lets us ask for the most compatible profile possible. https://bugzilla.gnome.org/show_bug.cgi?id=744407
2015-02-12 17:30:42 +00:00
gdk_gl_context_get_required_version (context, &major, &minor);
debug_bit = gdk_gl_context_get_debug_enabled (context);
compat_bit = gdk_gl_context_get_forward_compatible (context);
gl: Drop profile for gdk_window_create_gl_context() Now that we have a two-stages GL context creation sequence, we can move the profile to a pre-realize option, like the debug and forward compatibility bits, or the GL version to use.
2015-02-12 12:34:28 +00:00
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
/* If there is no glXCreateContextAttribsARB() then we default to legacy */
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
legacy_bit = !display_x11->has_glx_create_context ||
Control legacy GL context via environment variable For testing purposes, we may want to force the creation of legacy GL contexts via an environment variable. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 18:57:45 +00:00
(_gdk_gl_flags & GDK_GL_LEGACY) != 0;
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
es_bit = ((_gdk_gl_flags & GDK_GL_GLES) != 0 ||
(share != NULL && gdk_gl_context_get_use_es (share))) &&
(display_x11->has_glx_create_context && display_x11->has_glx_create_es2_context);
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
/* We cannot share legacy contexts with core profile ones, so the
* shared context is the one that decides if we're going to create
* a legacy context or not.
*/
if (share != NULL && gdk_gl_context_is_legacy (share))
legacy_bit = TRUE;
Remove GdkGLProfile The existence of OpenGL implementations that do not provide the full core profile compatibility because of reasons beyond the technical, like llvmpipe not implementing floating point buffers, makes the existence of GdkGLProfile and documenting the fact that we use core profiles a bit harder. Since we do not have any existing profile except the default, we can remove the GdkGLProfile and its related API from GDK and GTK+, and sweep the whole thing under the carpet, while we wait for an extension that lets us ask for the most compatible profile possible. https://bugzilla.gnome.org/show_bug.cgi?id=744407
2015-02-12 17:30:42 +00:00
flags = 0;
if (debug_bit)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (compat_bit)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
Remove GdkGLProfile The existence of OpenGL implementations that do not provide the full core profile compatibility because of reasons beyond the technical, like llvmpipe not implementing floating point buffers, makes the existence of GdkGLProfile and documenting the fact that we use core profiles a bit harder. Since we do not have any existing profile except the default, we can remove the GdkGLProfile and its related API from GDK and GTK+, and sweep the whole thing under the carpet, while we wait for an extension that lets us ask for the most compatible profile possible. https://bugzilla.gnome.org/show_bug.cgi?id=744407
2015-02-12 17:30:42 +00:00
GDK_NOTE (OPENGL,
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
g_message ("Creating GLX context (version:%d.%d, debug:%s, forward:%s, legacy:%s, es:%s)",
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
major, minor,
debug_bit ? "yes" : "no",
compat_bit ? "yes" : "no",
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
legacy_bit ? "yes" : "no",
es_bit ? "yes" : "no"));
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
/* If we have access to GLX_ARB_create_context_profile then we can ask for
* a compatibility profile; if we don't, then we have to fall back to the
* old GLX 1.3 API.
*/
if (legacy_bit && !GDK_X11_DISPLAY (display)->has_glx_create_context)
{
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
GDK_NOTE (OPENGL, g_message ("Creating legacy GL context on request"));
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
context_x11->glx_context = create_legacy_context (display, context_x11->glx_config, share);
}
else
{
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
int profile;
if (es_bit)
profile = GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
else
profile = legacy_bit ? GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB
: GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
/* We need to tweak the version, otherwise we may end up requesting
* a compatibility context with a minimum version of 3.2, which is
* an error
*/
if (legacy_bit)
{
major = 3;
minor = 0;
}
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
GDK_NOTE (OPENGL, g_message ("Creating GL3 context"));
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
context_x11->glx_context = create_gl3_context (display,
context_x11->glx_config,
share,
profile, flags, major, minor);
/* Fall back to legacy in case the GL3 context creation failed */
if (context_x11->glx_context == NULL)
{
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
GDK_NOTE (OPENGL, g_message ("Creating fallback legacy context"));
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
context_x11->glx_context = create_legacy_context (display, context_x11->glx_config, share);
legacy_bit = TRUE;
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
es_bit = FALSE;
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
}
}
Remove GdkGLProfile The existence of OpenGL implementations that do not provide the full core profile compatibility because of reasons beyond the technical, like llvmpipe not implementing floating point buffers, makes the existence of GdkGLProfile and documenting the fact that we use core profiles a bit harder. Since we do not have any existing profile except the default, we can remove the GdkGLProfile and its related API from GDK and GTK+, and sweep the whole thing under the carpet, while we wait for an extension that lets us ask for the most compatible profile possible. https://bugzilla.gnome.org/show_bug.cgi?id=744407
2015-02-12 17:30:42 +00:00
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
if (context_x11->glx_context == NULL)
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("Unable to create a GL context"));
return FALSE;
}
x11: Create legacy GLX contexts If GLX has support for the GLX_ARB_create_context_profile extension, then we use the GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; if it does not, we fall back to the old glXCreateNewContext() API. We use the shared GdkGLContext to decide whether the GLX context should use the legacy bit or not. https://bugzilla.gnome.org/show_bug.cgi?id=756142
2015-10-06 17:59:35 +00:00
/* Ensure that any other context is created with a legacy bit set */
gdk_gl_context_set_is_legacy (context, legacy_bit);
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
/* Ensure that any other context is created with a ES bit set */
gdk_gl_context_set_use_es (context, es_bit);
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
xvisinfo = find_xvisinfo_for_fbconfig (display, context_x11->glx_config);
info = get_glx_drawable_info (window->impl_window);
if (info == NULL)
{
XSetWindowAttributes attrs;
unsigned long mask;
gdk_x11_display_error_trap_push (display);
info = g_slice_new0 (DrawableInfo);
info->display = display;
info->last_frame_counter = 0;
attrs.override_redirect = True;
attrs.colormap = XCreateColormap (dpy, DefaultRootWindow (dpy), xvisinfo->visual, AllocNone);
attrs.border_pixel = 0;
mask = CWOverrideRedirect | CWColormap | CWBorderPixel;
info->dummy_xwin = XCreateWindow (dpy, DefaultRootWindow (dpy),
-100, -100, 1, 1,
0,
xvisinfo->depth,
CopyFromParent,
xvisinfo->visual,
mask,
&attrs);
XMapWindow(dpy, info->dummy_xwin);
if (GDK_X11_DISPLAY (display)->glx_version >= 13)
{
info->glx_drawable = glXCreateWindow (dpy, context_x11->glx_config,
gdk_x11_window_get_xid (window->impl_window),
NULL);
info->dummy_glx = glXCreateWindow (dpy, context_x11->glx_config, info->dummy_xwin, NULL);
}
if (gdk_x11_display_error_trap_pop (display))
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("Unable to create a GL context"));
XFree (xvisinfo);
drawable_info_free (info);
glXDestroyContext (dpy, context_x11->glx_context);
context_x11->glx_context = NULL;
return FALSE;
}
set_glx_drawable_info (window->impl_window, info);
}
XFree (xvisinfo);
if (context_x11->is_attached)
drawable = info->glx_drawable ? info->glx_drawable : gdk_x11_window_get_xid (window->impl_window);
else
drawable = info->dummy_glx ? info->dummy_glx : info->dummy_xwin;
context_x11->is_direct = glXIsDirect (dpy, context_x11->glx_context);
context_x11->drawable = drawable;
GDK_NOTE (OPENGL,
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
g_message ("Realized GLX context[%p], %s",
context_x11->glx_context,
context_x11->is_direct ? "direct" : "indirect"));
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
return TRUE;
}
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
static void
gdk_x11_gl_context_dispose (GObject *gobject)
{
GdkX11GLContext *context_x11 = GDK_X11_GL_CONTEXT (gobject);
if (context_x11->glx_context != NULL)
{
GdkGLContext *context = GDK_GL_CONTEXT (gobject);
GdkGLContext: Add display property We need to use this in the code path where we make the context non-current during destroy, because at that point the window could be destroyed and gdk_window_get_display() would return NULL.
2014-11-03 12:20:55 +00:00
GdkDisplay *display = gdk_gl_context_get_display (context);
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
Display *dpy = gdk_x11_display_get_xdisplay (display);
if (glXGetCurrentContext () == context_x11->glx_context)
glXMakeContextCurrent (dpy, None, None, NULL);
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
GDK_NOTE (OPENGL, g_message ("Destroying GLX context"));
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
glXDestroyContext (dpy, context_x11->glx_context);
context_x11->glx_context = NULL;
}
G_OBJECT_CLASS (gdk_x11_gl_context_parent_class)->dispose (gobject);
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
static void
gdk_x11_gl_context_class_init (GdkX11GLContextClass *klass)
{
GdkGLContextClass *context_class = GDK_GL_CONTEXT_CLASS (klass);
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
context_class->realize = gdk_x11_gl_context_realize;
Rename gdk_gl_context_flush_buffer to gdk_gl_context_end_frame This makes a lot more sense.
2014-10-27 15:33:37 +00:00
context_class->end_frame = gdk_x11_gl_context_end_frame;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
context_class->texture_from_surface = gdk_x11_gl_context_texture_from_surface;
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
gobject_class->dispose = gdk_x11_gl_context_dispose;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
}
static void
gdk_x11_gl_context_init (GdkX11GLContext *self)
{
GdkGLContextX11: Only set swap interval when it changed
2014-11-05 11:02:18 +00:00
self->do_frame_sync = TRUE;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
}
gboolean
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
gdk_x11_screen_init_gl (GdkScreen *screen)
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
GdkDisplay *display = gdk_screen_get_display (screen);
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
Display *dpy;
int error_base, event_base;
int screen_num;
if (display_x11->have_glx)
return TRUE;
Don't initialize GL if it has been disabled We've observed hangs of mutter when it initializes GTK+, which are caused by initializing GL, which in turn makes xwayland call back into mutter. With this change, mutter should just disable GL support in GDK, and things will work.
2014-12-19 17:27:31 +00:00
if (_gdk_gl_flags & GDK_GL_DISABLE)
return FALSE;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
dpy = gdk_x11_display_get_xdisplay (display);
x11: Query whether we have GLX support Epoxy 1.4 has new ad hoc API that we can use to check whether GLX is available on the current system. If we didn't use this API, we'd have to manually dlopen libGL (or its equivalent on different OSes) and check if it had GLX symbols; since Epoxy already does all of this internally, we can simply ask it instead. https://bugzilla.gnome.org/show_bug.cgi?id=775279 (cherry picked from commit 02eb344950547c66a9096094f271b98e94614fcb) Signed-off-by: Emmanuele Bassi <ebassi@gnome.org>
2017-02-16 00:04:50 +00:00
if (!epoxy_has_glx (dpy))
return FALSE;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
if (!glXQueryExtension (dpy, &error_base, &event_base))
return FALSE;
screen_num = GDK_X11_SCREEN (screen)->screen_num;
display_x11->have_glx = TRUE;
display_x11->glx_version = epoxy_glx_version (dpy, screen_num);
display_x11->glx_error_base = error_base;
display_x11->glx_event_base = event_base;
display_x11->has_glx_create_context =
epoxy_has_glx_extension (dpy, screen_num, "GLX_ARB_create_context_profile");
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
display_x11->has_glx_create_es2_context =
epoxy_has_glx_extension (dpy, screen_num, "GLX_EXT_create_context_es2_profile");
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
display_x11->has_glx_swap_interval =
epoxy_has_glx_extension (dpy, screen_num, "GLX_SGI_swap_control");
display_x11->has_glx_texture_from_pixmap =
epoxy_has_glx_extension (dpy, screen_num, "GLX_EXT_texture_from_pixmap");
display_x11->has_glx_video_sync =
epoxy_has_glx_extension (dpy, screen_num, "GLX_SGI_video_sync");
display_x11->has_glx_buffer_age =
epoxy_has_glx_extension (dpy, screen_num, "GLX_EXT_buffer_age");
display_x11->has_glx_sync_control =
epoxy_has_glx_extension (dpy, screen_num, "GLX_OML_sync_control");
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
display_x11->has_glx_multisample =
epoxy_has_glx_extension (dpy, screen_num, "GLX_ARB_multisample");
display_x11->has_glx_visual_rating =
epoxy_has_glx_extension (dpy, screen_num, "GLX_EXT_visual_rating");
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GDK_NOTE (OPENGL,
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
g_message ("GLX version %d.%d found\n"
" - Vendor: %s\n"
" - Checked extensions:\n"
"\t* GLX_ARB_create_context_profile: %s\n"
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
"\t* GLX_EXT_create_context_es2_profile: %s\n"
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
"\t* GLX_SGI_swap_control: %s\n"
"\t* GLX_EXT_texture_from_pixmap: %s\n"
"\t* GLX_SGI_video_sync: %s\n"
"\t* GLX_EXT_buffer_age: %s\n"
"\t* GLX_OML_sync_control: %s",
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
display_x11->glx_version / 10,
display_x11->glx_version % 10,
glXGetClientString (dpy, GLX_VENDOR),
display_x11->has_glx_create_context ? "yes" : "no",
x11: Allow creating GLES contexts We need to check for the GLX_EXT_create_context_es2_profile extension, which allows us to create a GLES context while using the GLX API.
2016-04-22 17:01:19 +00:00
display_x11->has_glx_create_es2_context ? "yes" : "no",
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
display_x11->has_glx_swap_interval ? "yes" : "no",
display_x11->has_glx_texture_from_pixmap ? "yes" : "no",
display_x11->has_glx_video_sync ? "yes" : "no",
display_x11->has_glx_buffer_age ? "yes" : "no",
display_x11->has_glx_sync_control ? "yes" : "no"));
return TRUE;
}
#define MAX_GLX_ATTRS 30
static gboolean
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
find_fbconfig_for_visual (GdkDisplay *display,
GdkVisual *visual,
GLXFBConfig *fb_config_out,
GError **error)
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
static int attrs[MAX_GLX_ATTRS];
Display *dpy = gdk_x11_display_get_xdisplay (display);
GLXFBConfig *configs;
int n_configs, i;
gboolean use_rgba;
gboolean retval = FALSE;
GdkGLContextX11: Ensure we get the fbconfig with the exact same visual We really want a gl context with exactly the same visual, or we will get a badmatch later, which hits us on nvidia as per: https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-28 15:43:38 +00:00
VisualID xvisual_id = XVisualIDFromVisual(gdk_x11_visual_get_xvisual (visual));
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
i = 0;
attrs[i++] = GLX_DRAWABLE_TYPE;
attrs[i++] = GLX_WINDOW_BIT;
attrs[i++] = GLX_RENDER_TYPE;
attrs[i++] = GLX_RGBA_BIT;
attrs[i++] = GLX_DOUBLEBUFFER;
attrs[i++] = GL_TRUE;
attrs[i++] = GLX_RED_SIZE;
GdkGLContextX11: Ensure we get the fbconfig with the exact same visual We really want a gl context with exactly the same visual, or we will get a badmatch later, which hits us on nvidia as per: https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-28 15:43:38 +00:00
attrs[i++] = 1;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
attrs[i++] = GLX_GREEN_SIZE;
GdkGLContextX11: Ensure we get the fbconfig with the exact same visual We really want a gl context with exactly the same visual, or we will get a badmatch later, which hits us on nvidia as per: https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-28 15:43:38 +00:00
attrs[i++] = 1;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
attrs[i++] = GLX_BLUE_SIZE;
GdkGLContextX11: Ensure we get the fbconfig with the exact same visual We really want a gl context with exactly the same visual, or we will get a badmatch later, which hits us on nvidia as per: https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-28 15:43:38 +00:00
attrs[i++] = 1;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
use_rgba = (visual == gdk_screen_get_rgba_visual (gdk_display_get_default_screen (display)));
if (use_rgba)
{
attrs[i++] = GLX_ALPHA_SIZE;
attrs[i++] = 1;
}
else
{
attrs[i++] = GLX_ALPHA_SIZE;
attrs[i++] = GLX_DONT_CARE;
}
attrs[i++] = None;
g_assert (i < MAX_GLX_ATTRS);
configs = glXChooseFBConfig (dpy, DefaultScreen (dpy), attrs, &n_configs);
if (configs == NULL || n_configs == 0)
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_UNSUPPORTED_FORMAT,
_("No available configurations for the given pixel format"));
return FALSE;
}
for (i = 0; i < n_configs; i++)
{
XVisualInfo *visinfo;
visinfo = glXGetVisualFromFBConfig (dpy, configs[i]);
if (visinfo == NULL)
GdkGLContextX11: Don't free NULL visual info
2014-10-29 10:25:21 +00:00
continue;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkGLContextX11: Ensure we get the fbconfig with the exact same visual We really want a gl context with exactly the same visual, or we will get a badmatch later, which hits us on nvidia as per: https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-28 15:43:38 +00:00
if (visinfo->visualid != xvisual_id)
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
{
XFree (visinfo);
continue;
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkGLContextX11: Ensure we get the fbconfig with the exact same visual We really want a gl context with exactly the same visual, or we will get a badmatch later, which hits us on nvidia as per: https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-28 15:43:38 +00:00
if (fb_config_out != NULL)
*fb_config_out = configs[i];
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
XFree (visinfo);
GdkGLContextX11: Ensure we get the fbconfig with the exact same visual We really want a gl context with exactly the same visual, or we will get a badmatch later, which hits us on nvidia as per: https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-28 15:43:38 +00:00
retval = TRUE;
goto out;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
}
g_set_error (error, GDK_GL_ERROR,
GDK_GL_ERROR_UNSUPPORTED_FORMAT,
_("No available configurations for the given RGBA pixel format"));
out:
XFree (configs);
return retval;
}
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
struct glvisualinfo {
int supports_gl;
int double_buffer;
int stereo;
int alpha_size;
int depth_size;
int stencil_size;
int num_multisample;
int visual_caveat;
};
static gboolean
visual_compatible (const GdkVisual *a, const GdkVisual *b)
{
return a->type == b->type &&
a->depth == b->depth &&
a->red_mask == b->red_mask &&
a->green_mask == b->green_mask &&
a->blue_mask == b->blue_mask &&
a->colormap_size == b->colormap_size &&
a->bits_per_rgb == b->bits_per_rgb;
}
static gboolean
visual_is_rgba (const GdkVisual *visual)
{
return
visual->depth == 32 &&
visual->red_mask == 0xff0000 &&
visual->green_mask == 0x00ff00 &&
visual->blue_mask == 0x0000ff;
}
/* This picks a compatible (as in has the same X visual details) visual
that has "better" characteristics on the GL side */
static GdkVisual *
pick_better_visual_for_gl (GdkX11Screen *x11_screen,
struct glvisualinfo *gl_info,
GdkVisual *compatible)
{
GdkVisual *visual;
int i;
gboolean want_alpha = visual_is_rgba (compatible);
/* First look for "perfect match", i.e:
* supports gl
* double buffer
* alpha iff visual is an rgba visual
* no unnecessary stuff
*/
for (i = 0; i < x11_screen->nvisuals; i++)
{
visual = x11_screen->visuals[i];
if (visual_compatible (visual, compatible) &&
gl_info[i].supports_gl &&
gl_info[i].double_buffer &&
!gl_info[i].stereo &&
(want_alpha ? (gl_info[i].alpha_size > 0) : (gl_info[i].alpha_size == 0)) &&
(gl_info[i].depth_size == 0) &&
(gl_info[i].stencil_size == 0) &&
(gl_info[i].num_multisample == 0) &&
(gl_info[i].visual_caveat == GLX_NONE_EXT))
return visual;
}
if (!want_alpha)
{
/* Next, allow alpha even if we don't want it: */
for (i = 0; i < x11_screen->nvisuals; i++)
{
visual = x11_screen->visuals[i];
if (visual_compatible (visual, compatible) &&
gl_info[i].supports_gl &&
gl_info[i].double_buffer &&
!gl_info[i].stereo &&
(gl_info[i].depth_size == 0) &&
(gl_info[i].stencil_size == 0) &&
(gl_info[i].num_multisample == 0) &&
(gl_info[i].visual_caveat == GLX_NONE_EXT))
return visual;
}
}
/* Next, allow depth and stencil buffers: */
for (i = 0; i < x11_screen->nvisuals; i++)
{
visual = x11_screen->visuals[i];
if (visual_compatible (visual, compatible) &&
gl_info[i].supports_gl &&
gl_info[i].double_buffer &&
!gl_info[i].stereo &&
(gl_info[i].num_multisample == 0) &&
(gl_info[i].visual_caveat == GLX_NONE_EXT))
return visual;
}
/* Next, allow multisample: */
for (i = 0; i < x11_screen->nvisuals; i++)
{
visual = x11_screen->visuals[i];
if (visual_compatible (visual, compatible) &&
gl_info[i].supports_gl &&
gl_info[i].double_buffer &&
!gl_info[i].stereo &&
(gl_info[i].visual_caveat == GLX_NONE_EXT))
return visual;
}
return compatible;
}
Cache default gdk visuals in the GDK_VISUALS property on the root window This means we don't have to try to initialize opengl in every gtk instance that is stated. It will only happen for the first one. https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-29 12:33:08 +00:00
static gboolean
get_cached_gl_visuals (GdkDisplay *display, int *system, int *rgba)
{
gboolean found;
Atom type_return;
gint format_return;
gulong nitems_return;
gulong bytes_after_return;
guchar *data = NULL;
Display *dpy;
dpy = gdk_x11_display_get_xdisplay (display);
found = FALSE;
gdk_x11_display_error_trap_push (display);
if (XGetWindowProperty (dpy, DefaultRootWindow (dpy),
gdk_x11_get_xatom_by_name_for_display (display, "GDK_VISUALS"),
0, 2, False, XA_INTEGER, &type_return,
&format_return, &nitems_return,
&bytes_after_return, &data) == Success)
{
if (type_return == XA_INTEGER &&
format_return == 32 &&
nitems_return == 2 &&
data != NULL)
{
long *visuals = (long *) data;
*system = (int)visuals[0];
*rgba = (int)visuals[1];
found = TRUE;
}
}
gdk_x11_display_error_trap_pop_ignored (display);
if (data)
XFree (data);
return found;
}
static void
save_cached_gl_visuals (GdkDisplay *display, int system, int rgba)
{
long visualdata[2];
Display *dpy;
dpy = gdk_x11_display_get_xdisplay (display);
visualdata[0] = system;
visualdata[1] = rgba;
gdk_x11_display_error_trap_push (display);
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
XChangeProperty (dpy, DefaultRootWindow (dpy),
gdk_x11_get_xatom_by_name_for_display (display, "GDK_VISUALS"),
XA_INTEGER, 32, PropModeReplace,
(unsigned char *)visualdata, 2);
Cache default gdk visuals in the GDK_VISUALS property on the root window This means we don't have to try to initialize opengl in every gtk instance that is stated. It will only happen for the first one. https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-29 12:33:08 +00:00
gdk_x11_display_error_trap_pop_ignored (display);
}
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
void
_gdk_x11_screen_update_visuals_for_gl (GdkScreen *screen)
{
GdkX11Screen *x11_screen;
GdkDisplay *display;
GdkX11Display *display_x11;
Display *dpy;
struct glvisualinfo *gl_info;
int i;
Cache default gdk visuals in the GDK_VISUALS property on the root window This means we don't have to try to initialize opengl in every gtk instance that is stated. It will only happen for the first one. https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-29 12:33:08 +00:00
int system_visual_id, rgba_visual_id;
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
x11_screen = GDK_X11_SCREEN (screen);
display = x11_screen->display;
display_x11 = GDK_X11_DISPLAY (display);
Cache default gdk visuals in the GDK_VISUALS property on the root window This means we don't have to try to initialize opengl in every gtk instance that is stated. It will only happen for the first one. https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-29 12:33:08 +00:00
dpy = gdk_x11_display_get_xdisplay (display);
/* We save the default visuals as a property on the root window to avoid
having to initialize GL each time, as it may not be used later. */
if (get_cached_gl_visuals (display, &system_visual_id, &rgba_visual_id))
{
for (i = 0; i < x11_screen->nvisuals; i++)
{
GdkVisual *visual = x11_screen->visuals[i];
int visual_id = gdk_x11_visual_get_xvisual (visual)->visualid;
if (visual_id == system_visual_id)
x11_screen->system_visual = visual;
if (visual_id == rgba_visual_id)
x11_screen->rgba_visual = visual;
}
return;
}
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
if (!gdk_x11_screen_init_gl (screen))
return;
gl_info = g_new0 (struct glvisualinfo, x11_screen->nvisuals);
for (i = 0; i < x11_screen->nvisuals; i++)
{
XVisualInfo *visual_list;
XVisualInfo visual_template;
int nxvisuals;
visual_template.screen = x11_screen->screen_num;
visual_template.visualid = gdk_x11_visual_get_xvisual (x11_screen->visuals[i])->visualid;
visual_list = XGetVisualInfo (x11_screen->xdisplay, VisualIDMask| VisualScreenMask, &visual_template, &nxvisuals);
if (visual_list == NULL)
continue;
glXGetConfig (dpy, &visual_list[0], GLX_USE_GL, &gl_info[i].supports_gl);
glXGetConfig (dpy, &visual_list[0], GLX_DOUBLEBUFFER, &gl_info[i].double_buffer);
glXGetConfig (dpy, &visual_list[0], GLX_STEREO, &gl_info[i].stereo);
glXGetConfig (dpy, &visual_list[0], GLX_ALPHA_SIZE, &gl_info[i].alpha_size);
glXGetConfig (dpy, &visual_list[0], GLX_DEPTH_SIZE, &gl_info[i].depth_size);
glXGetConfig (dpy, &visual_list[0], GLX_STENCIL_SIZE, &gl_info[i].stencil_size);
if (display_x11->has_glx_multisample)
glXGetConfig(dpy, &visual_list[0], GLX_SAMPLE_BUFFERS_ARB, &gl_info[i].num_multisample);
if (display_x11->has_glx_visual_rating)
glXGetConfig(dpy, &visual_list[0], GLX_VISUAL_CAVEAT_EXT, &gl_info[i].visual_caveat);
else
gl_info[i].visual_caveat = GLX_NONE_EXT;
XFree (visual_list);
}
x11_screen->system_visual = pick_better_visual_for_gl (x11_screen, gl_info, x11_screen->system_visual);
if (x11_screen->rgba_visual)
x11_screen->rgba_visual = pick_better_visual_for_gl (x11_screen, gl_info, x11_screen->rgba_visual);
Cache default gdk visuals in the GDK_VISUALS property on the root window This means we don't have to try to initialize opengl in every gtk instance that is stated. It will only happen for the first one. https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-29 12:33:08 +00:00
GdkX11GLContext: Fix leak
2014-10-29 12:52:04 +00:00
g_free (gl_info);
Cache default gdk visuals in the GDK_VISUALS property on the root window This means we don't have to try to initialize opengl in every gtk instance that is stated. It will only happen for the first one. https://bugzilla.gnome.org/show_bug.cgi?id=738670
2014-10-29 12:33:08 +00:00
save_cached_gl_visuals (display,
gdk_x11_visual_get_xvisual (x11_screen->system_visual)->visualid,
x11_screen->rgba_visual ? gdk_x11_visual_get_xvisual (x11_screen->rgba_visual)->visualid : 0);
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkGLContext *
gdk_x11_window_create_gl_context (GdkWindow *window,
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
gboolean attached,
GdkGLContext *share,
GError **error)
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
GdkDisplay *display;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkX11GLContext *context;
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
GdkVisual *visual;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GLXFBConfig config;
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
display = gdk_window_get_display (window);
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
if (!gdk_x11_screen_init_gl (gdk_window_get_screen (window)))
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("No GL implementation is available"));
return NULL;
}
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
visual = gdk_window_get_visual (window);
GL: Split GL context creation in two phases One of the major requests by OpenGL users has been the ability to specify settings when creating a GL context, like the version to use or whether the debug support should be enabled. We have a couple of requirements in terms of API: • avoid, if at all possible, the "C arrays of integers with attribute, value pairs", which are hard to write and hard to bind in non-C languages. • allow failing in a recoverable way. • do not make the GL context creation API a mess of arguments. Looking at prior art, it seems that a common pattern is to split the construction phase in two: • a first phase that creates a GL context wrapper object and does preliminary checks on the environment. • a second phase that creates the backend-specific GL object. We adopted a similar pattern: • gdk_window_create_gl_context() creates a GdkGLContext • gdk_gl_context_realize() creates the underlying resources Calling gdk_gl_context_make_current() also realizes the context, so simple GL users do not need to care. Advanced users will want to call gdk_window_create_gl_context(), set up the optional requirements, and then call gdk_gl_context_realize(). If either of these two steps fails, it's possible to recover by changing the requirements, or simply creating a new GdkGLContext instance. https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-27 21:23:23 +00:00
if (!find_fbconfig_for_visual (display, visual, &config, error))
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
return NULL;
GL: Follow naming conventions All the GDK type defines are GDK_TYPE_..., so follow this pattern for the GLContext subclasses as well.
2014-10-22 03:39:05 +00:00
context = g_object_new (GDK_TYPE_X11_GL_CONTEXT,
GdkGLContext: Add display property We need to use this in the code path where we make the context non-current during destroy, because at that point the window could be destroyed and gdk_window_get_display() would return NULL.
2014-11-03 12:20:55 +00:00
"display", display,
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
"window", window,
GdkGLContext: Track shared context This allows us to read it back, but primarily it ensures the shared context wrapper stays alive as long as the context.
2014-10-30 11:04:23 +00:00
"shared-context", share,
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
NULL);
context->glx_config = config;
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
context->is_attached = attached;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
return GDK_GL_CONTEXT (context);
}
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
gboolean
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
gdk_x11_display_make_gl_context_current (GdkDisplay *display,
GdkGLContext *context)
{
GdkX11GLContext *context_x11;
Display *dpy = gdk_x11_display_get_xdisplay (display);
GdkWindow *window;
GdkScreen *screen;
gboolean do_frame_sync = FALSE;
if (context == NULL)
{
glXMakeContextCurrent (dpy, None, None, NULL);
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
return TRUE;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
}
context_x11 = GDK_X11_GL_CONTEXT (context);
x11/gl: Do not try to call MakeCurrent with a NULL context This should not happen, but better safe than sorry. https://bugzilla.gnome.org/show_bug.cgi?id=746746
2015-03-25 15:18:44 +00:00
if (context_x11->glx_context == NULL)
{
g_critical ("No GLX context associated to the GdkGLContext; you must "
"call gdk_gl_context_realize() first.");
return FALSE;
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GDK_NOTE (OPENGL,
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
g_message ("Making GLX context current to drawable %lu",
(unsigned long) context_x11->drawable));
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
if (!glXMakeContextCurrent (dpy, context_x11->drawable, context_x11->drawable,
context_x11->glx_context))
{
GDK_NOTE (OPENGL,
x11: Don't use g_print for debug output The g_print documentation explicitly says not to do this, since g_print is meant to be redirected by applications. Instead use g_message for logging that can be triggered via GTK_DEBUG.
2016-02-29 02:29:16 +00:00
g_message ("Making GLX context current failed"));
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
return FALSE;
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
gl: Make all user GdkGLContexts not attached to any window We make user facing gl contexts not attached to a surface if possible, or attached to dummy surfaces. This means nothing can accidentally read/write to the toplevel back buffer.
2014-10-09 14:09:05 +00:00
if (context_x11->is_attached && GDK_X11_DISPLAY (display)->has_glx_swap_interval)
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
gdk_x11_display_make_gl_context_current: move some code This moves the code related to the frame sync code into the is_attached check, which means we don't have to ever run this when making non-window-paint contexts current. This is a minior speed thing, but the main advantage is that it makes making a non-paint context current threadsafe.
2014-10-30 15:04:28 +00:00
window = gdk_gl_context_get_window (context);
/* If the WM is compositing there is no particular need to delay
* the swap when drawing on the offscreen, rendering to the screen
* happens later anyway, and its up to the compositor to sync that
* to the vblank. */
screen = gdk_window_get_screen (window);
do_frame_sync = ! gdk_screen_is_composited (screen);
GdkGLContextX11: Only set swap interval when it changed
2014-11-05 11:02:18 +00:00
if (do_frame_sync != context_x11->do_frame_sync)
{
context_x11->do_frame_sync = do_frame_sync;
gdk_x11_display_make_gl_context_current: move some code This moves the code related to the frame sync code into the is_attached check, which means we don't have to ever run this when making non-window-paint contexts current. This is a minior speed thing, but the main advantage is that it makes making a non-paint context current threadsafe.
2014-10-30 15:04:28 +00:00
GdkGLContextX11: Only set swap interval when it changed
2014-11-05 11:02:18 +00:00
if (do_frame_sync)
glXSwapIntervalSGI (1);
else
glXSwapIntervalSGI (0);
}
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
}
GdkGLContext: Change the way we track the current context To properly support multithreaded use we use a global GPrivate to track the current context. Since we also don't need to track the current context on the display we move gdk_display_destroy_gl_context to GdkGLContext::discard.
2014-10-30 10:46:09 +00:00
return TRUE;
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
}
/**
* gdk_x11_display_get_glx_version:
* @display: a #GdkDisplay
* @major: (out): return location for the GLX major version
* @minor: (out): return location for the GLX minor version
*
* Retrieves the version of the GLX implementation.
*
* Returns: %TRUE if GLX is available
*
Trivial formatting fixes
2014-10-12 03:17:34 +00:00
* Since: 3.16
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
*/
gboolean
gdk_x11_display_get_glx_version (GdkDisplay *display,
Trivial formatting fixes
2014-10-12 03:17:34 +00:00
gint *major,
gint *minor)
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
if (!GDK_IS_X11_DISPLAY (display))
return FALSE;
X11: Pick better system and rgba visuals for GL We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
2014-10-29 11:35:07 +00:00
if (!gdk_x11_screen_init_gl (gdk_display_get_default_screen (display)))
gdk: Add support for OpenGL This adds the new type GdkGLContext that wraps an OpenGL context for a particular native window. It also adds support for the gdk paint machinery to use OpenGL to draw everything. As soon as anyone creates a GL context for a native window we create a "paint context" for that GdkWindow and switch to using GL for painting it. This commit contains only an implementation for X11 (using GLX). The way painting works is that all client gl contexts draw into offscreen buffers rather than directly to the back buffer, and the way something gets onto the window is by using gdk_cairo_draw_from_gl() to draw part of that buffer onto the draw cairo context. As a fallback (if we're doing redirected drawing or some effect like a cairo_push_group()) we read back the gl buffer into memory and composite using cairo. This means that GL rendering works in all cases, including rendering to a PDF. However, this is not particularly fast. In the *typical* case, where we're drawing directly to the window in the regular paint loop we hit the fast path. The fast path uses opengl to draw the buffer to the window back buffer, either by blitting or texturing. Then we track the region that was drawn, and when the draw ends we paint the normal cairo surface to the window (using texture-from-pixmap in the X11 case, or texture from cairo image otherwise) in the regions where there is no gl painted. There are some complexities wrt layering of gl and cairo areas though: * We track via gdk_window_mark_paint_from_clip() whenever gtk is painting over a region we previously rendered with opengl (flushed_region). This area (needs_blend_region) is blended rather than copied at the end of the frame. * If we're drawing a gl texture with alpha we first copy the current cairo_surface inside the target region to the back buffer before we blend over it. These two operations allow us full stacking of transparent gl and cairo regions.
2014-10-09 08:45:44 +00:00
return FALSE;
if (major != NULL)
*major = GDK_X11_DISPLAY (display)->glx_version / 10;
if (minor != NULL)
*minor = GDK_X11_DISPLAY (display)->glx_version % 10;
return TRUE;
}
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