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gtk2/gdk/x11/gdkglcontext-x11.h

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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.
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/* GDK - The GIMP Drawing Kit
*
* gdkglcontext-x11.h: Private 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/>.
*/
#ifndef __GDK_X11_GL_CONTEXT__
#define __GDK_X11_GL_CONTEXT__
x11: Decouple GLX from GdkX11GLContext If we want to add an EGL implementation for the X11 backend, we are going to need to move the GLX bits into their own class. The first step is to declare GdkX11GLContext as an abstract type, and then subclass it into a GdkX11GLContextGLX type, which includes the whole GLX implementation.
2021-05-10 14:07:08 +00:00
#include "gdkx11glcontext.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 <X11/X.h>
#include <X11/Xlib.h>
x11: Defer _NET_WM_FRAME_DRAWN update until frame usable by compositor With the vendor provided Nvidia driver there is a small window of time after drawing to a GL surface before the updates to that surface can be used by the compositor. Drawing is already coordinated with the compositor through the frame synchronization protocol detailed here: https://fishsoup.net/misc/wm-spec-synchronization.html Unfortunately, at the moment, GdkX11Surface tells the compositor the frame is ready immediately after drawing to the surface, not later, when it's consumable by the compositor. This commit defers announcing the frame as ready until it's consumable by the compositor. It does this by listening for the X server to announce damage events associated with the frame drawing. It tries to find the right damage event by waiting until fence placed at buffer swap time signals.
2020-05-27 19:12:35 +00:00
#ifdef HAVE_XDAMAGE
#include <X11/extensions/Xdamage.h>
#endif
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 <epoxy/gl.h>
#include <epoxy/glx.h>
#include "gdkglcontextprivate.h"
x11: Pass the display, not the screen Screens are on their way out.
2021-06-06 17:56:35 +00:00
#include "gdkdisplay-x11.h"
GdkWindow -> GdkSurface: File renames Rename all *window.[ch] source files. This is an automatic operation, done by the following commands: for i in $(git ls-files gdk | grep window); do git mv $i $(echo $i | sed s/window/surface/); git sed -f g $(basename $i) $(basename $i | sed s/window/surface/) ; done git checkout NEWS* po-properties po
2018-03-20 10:46:11 +00:00
#include "gdksurface.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_BEGIN_DECLS
x11: Decouple GLX from GdkX11GLContext If we want to add an EGL implementation for the X11 backend, we are going to need to move the GLX bits into their own class. The first step is to declare GdkX11GLContext as an abstract type, and then subclass it into a GdkX11GLContextGLX type, which includes the whole GLX implementation.
2021-05-10 14:07:08 +00:00
#define GDK_X11_GL_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_X11_GL_CONTEXT, GdkX11GLContextClass))
#define GDK_X11_GL_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_X11_GL_CONTEXT, GdkX11GLContextClass))
#define GDK_X11_IS_GL_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_X11_GL_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
struct _GdkX11GLContext
{
GdkGLContext parent_instance;
};
struct _GdkX11GLContextClass
{
GdkGLContextClass parent_class;
};
x11: Use EGL for GL support This makes the X11 backend similar to the Wayland one, when it comes to OpenGL. Fall back to GLX only if EGL support is not available.
2021-05-10 17:11:05 +00:00
/* GLX */
#define GDK_TYPE_X11_GL_CONTEXT_GLX (gdk_x11_gl_context_glx_get_type())
#define GDK_X11_GL_CONTEXT_GLX(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_X11_GL_CONTEXT_GLX, GdkX11GLContextGLX))
#define GDK_IS_X11_GL_CONTEXT_GLX(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_X11_GL_CONTEXT_GLX))
typedef struct _GdkX11GLContextGLX GdkX11GLContextGLX;
x11: Rework Visual selection Instead of going via GdkVisual, doing a preselection and letting the GL initialization improve it, let the GL initialization pick an X Visual directly using X Visual code directly. The code should select the same visuals as before as it tries to apply the same logic, but it's a rewrite, so I expect I messed something up.
2021-06-13 15:34:55 +00:00
gboolean gdk_x11_display_init_glx (GdkX11Display *display_x11,
Visual **out_visual,
x11: Properly record the error when initializing GL That way, we can give a useful error message when things break down for users. These error messages could still be improved in places (like looking at the actual EGL error codes), but that seemed overkill.
2021-07-02 01:21:14 +00:00
int *out_depth,
GError **error);
x11: Store the GLX drawable in the surface Also, stop using a dummy window for unattached GL contexts and instead use the display's leader surface. Again, this mirrors EGL.
2021-06-29 21:45:50 +00:00
void gdk_x11_surface_destroy_glx_drawable (GdkX11Surface *self);
x11: Use EGL for GL support This makes the X11 backend similar to the Wayland one, when it comes to OpenGL. Fall back to GLX only if EGL support is not available.
2021-05-10 17:11:05 +00:00
x11: Decouple GLX from GdkX11GLContext If we want to add an EGL implementation for the X11 backend, we are going to need to move the GLX bits into their own class. The first step is to declare GdkX11GLContext as an abstract type, and then subclass it into a GdkX11GLContextGLX type, which includes the whole GLX implementation.
2021-05-10 14:07:08 +00:00
GType gdk_x11_gl_context_glx_get_type (void) G_GNUC_CONST;
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: Use EGL for GL support This makes the X11 backend similar to the Wayland one, when it comes to OpenGL. Fall back to GLX only if EGL support is not available.
2021-05-10 17:11:05 +00:00
/* EGL */
#define GDK_TYPE_X11_GL_CONTEXT_EGL (gdk_x11_gl_context_egl_get_type())
#define GDK_X11_GL_CONTEXT_EGL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_X11_GL_CONTEXT_EGL, GdkX11GLContextEGL))
#define GDK_IS_X11_GL_CONTEXT_EGL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_X11_GL_CONTEXT_EGL))
typedef struct _GdkX11GLContextEGL GdkX11GLContextEGL;
GType gdk_x11_gl_context_egl_get_type (void) G_GNUC_CONST;
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_END_DECLS
#endif /* __GDK_X11_GL_CONTEXT__ */
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