mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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bbd1c6cefa
We now have proper checks for gdk_screen_is_composited() and a proper implementation for gdk_screen_get_rgba_visual() for Windows, so we can remove the comments in this file stating that they aren't available for Windows.
646 lines
19 KiB
C
646 lines
19 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkglcontext-win32.c: Win32 specific OpenGL wrappers
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*
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* Copyright © 2014 Emmanuele Bassi
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* Copyright © 2014 Alexander Larsson
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* Copyright © 2014 Chun-wei Fan
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gdkprivate-win32.h"
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#include "gdkwindow-win32.h"
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#include "gdkglcontext-win32.h"
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#include "gdkdisplay-win32.h"
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#include "gdkwin32display.h"
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#include "gdkwin32glcontext.h"
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#include "gdkwin32misc.h"
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#include "gdkwin32screen.h"
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#include "gdkwin32window.h"
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#include "gdkglcontext.h"
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#include "gdkwindow.h"
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#include "gdkinternals.h"
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#include "gdkintl.h"
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#include <cairo.h>
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#include <epoxy/wgl.h>
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G_DEFINE_TYPE (GdkWin32GLContext, gdk_win32_gl_context, GDK_TYPE_GL_CONTEXT)
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static void
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_gdk_win32_gl_context_dispose (GObject *gobject)
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{
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GdkGLContext *context = GDK_GL_CONTEXT (gobject);
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GdkWin32GLContext *context_win32 = GDK_WIN32_GL_CONTEXT (gobject);
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GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (gdk_gl_context_get_display (context));
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if (context_win32->hglrc != NULL)
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{
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if (wglGetCurrentContext () == context_win32->hglrc)
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wglMakeCurrent (NULL, NULL);
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GDK_NOTE (OPENGL, g_print ("Destroying WGL context\n"));
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wglDeleteContext (context_win32->hglrc);
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context_win32->hglrc = NULL;
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ReleaseDC (display_win32->gl_hwnd, context_win32->gl_hdc);
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}
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G_OBJECT_CLASS (gdk_win32_gl_context_parent_class)->dispose (gobject);
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}
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static void
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gdk_win32_gl_context_class_init (GdkWin32GLContextClass *klass)
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{
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GdkGLContextClass *context_class = GDK_GL_CONTEXT_CLASS (klass);
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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context_class->end_frame = _gdk_win32_gl_context_end_frame;
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context_class->realize = _gdk_win32_gl_context_realize;
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gobject_class->dispose = _gdk_win32_gl_context_dispose;
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}
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static void
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gdk_win32_gl_context_init (GdkWin32GLContext *self)
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{
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}
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static void
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gdk_gl_blit_region (GdkWindow *window, cairo_region_t *region)
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{
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int n_rects, i;
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int scale = gdk_window_get_scale_factor (window);
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int wh = gdk_window_get_height (window);
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cairo_rectangle_int_t rect;
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n_rects = cairo_region_num_rectangles (region);
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for (i = 0; i < n_rects; i++)
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{
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cairo_region_get_rectangle (region, i, &rect);
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glScissor (rect.x * scale, (wh - rect.y - rect.height) * scale, rect.width * scale, rect.height * scale);
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glBlitFramebuffer (rect.x * scale, (wh - rect.y - rect.height) * scale, (rect.x + rect.width) * scale, (wh - rect.y) * scale,
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rect.x * scale, (wh - rect.y - rect.height) * scale, (rect.x + rect.width) * scale, (wh - rect.y) * scale,
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GL_COLOR_BUFFER_BIT, GL_NEAREST);
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}
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}
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void
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_gdk_win32_gl_context_end_frame (GdkGLContext *context,
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cairo_region_t *painted,
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cairo_region_t *damage)
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{
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GdkWin32GLContext *context_win32 = GDK_WIN32_GL_CONTEXT (context);
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GdkWindow *window = gdk_gl_context_get_window (context);
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GdkWin32Display *display = (GDK_WIN32_DISPLAY (gdk_gl_context_get_display (context)));
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gboolean can_wait = display->hasWglOMLSyncControl;
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gdk_gl_context_make_current (context);
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if (context_win32->do_frame_sync)
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{
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if (context_win32->do_frame_sync)
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{
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glFinish ();
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if (can_wait)
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{
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gint64 ust, msc, sbc;
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wglGetSyncValuesOML (context_win32->gl_hdc, &ust, &msc, &sbc);
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wglWaitForMscOML (context_win32->gl_hdc,
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0,
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2,
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(msc + 1) % 2,
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&ust, &msc, &sbc);
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}
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}
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}
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if (context_win32->do_blit_swap)
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{
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glDrawBuffer(GL_FRONT);
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glReadBuffer(GL_BACK);
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gdk_gl_blit_region (window, painted);
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glDrawBuffer(GL_BACK);
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glFlush();
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if (gdk_gl_context_has_frame_terminator (context))
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glFrameTerminatorGREMEDY ();
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}
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else
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SwapBuffers (context_win32->gl_hdc);
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}
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void
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_gdk_win32_window_invalidate_for_new_frame (GdkWindow *window,
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cairo_region_t *update_area)
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{
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cairo_rectangle_int_t window_rect;
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gboolean invalidate_all = FALSE;
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GdkWin32GLContext *context_win32;
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cairo_rectangle_int_t whole_window = { 0, 0, gdk_window_get_width (window), gdk_window_get_height (window) };
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/* Minimal update is ok if we're not drawing with gl */
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if (window->gl_paint_context == NULL)
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return;
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context_win32 = GDK_WIN32_GL_CONTEXT (window->gl_paint_context);
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context_win32->do_blit_swap = FALSE;
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if (gdk_gl_context_has_framebuffer_blit (window->gl_paint_context) &&
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cairo_region_contains_rectangle (update_area, &whole_window) != CAIRO_REGION_OVERLAP_IN)
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{
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context_win32->do_blit_swap = TRUE;
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}
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else
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invalidate_all = TRUE;
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if (invalidate_all)
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{
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window_rect.x = 0;
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window_rect.y = 0;
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window_rect.width = gdk_window_get_width (window);
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window_rect.height = gdk_window_get_height (window);
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/* If nothing else is known, repaint everything so that the back
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buffer is fully up-to-date for the swapbuffer */
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cairo_region_union_rectangle (update_area, &window_rect);
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}
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}
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typedef struct
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{
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ATOM wc_atom;
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HWND hwnd;
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HDC hdc;
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HGLRC hglrc;
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gboolean inited;
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} GdkWGLDummy;
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static void
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_destroy_dummy_gl_context (GdkWGLDummy dummy)
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{
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if (dummy.hglrc != NULL)
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{
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if (wglGetCurrentContext () == dummy.hglrc)
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wglMakeCurrent (NULL, NULL);
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wglDeleteContext (dummy.hglrc);
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dummy.hglrc = NULL;
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}
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if (dummy.hdc != NULL)
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{
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DeleteDC (dummy.hdc);
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dummy.hdc = NULL;
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}
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if (dummy.hwnd != NULL)
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{
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DestroyWindow (dummy.hwnd);
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dummy.hwnd = NULL;
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}
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if (dummy.wc_atom != 0)
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{
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UnregisterClass (MAKEINTATOM (dummy.wc_atom), GetModuleHandle (NULL));
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dummy.wc_atom = 0;
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}
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dummy.inited = FALSE;
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}
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/* Yup, we need to create a dummy window for the dummy WGL context */
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static void
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_get_dummy_window_hwnd (GdkWGLDummy *dummy)
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{
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WNDCLASSEX dummy_wc;
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memset (&dummy_wc, 0, sizeof (WNDCLASSEX));
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dummy_wc.cbSize = sizeof( WNDCLASSEX );
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dummy_wc.style = CS_OWNDC;
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dummy_wc.lpfnWndProc = (WNDPROC) DefWindowProc;
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dummy_wc.cbClsExtra = 0;
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dummy_wc.cbWndExtra = 0;
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dummy_wc.hInstance = GetModuleHandle( NULL );
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dummy_wc.hIcon = 0;
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dummy_wc.hCursor = NULL;
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dummy_wc.hbrBackground = 0;
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dummy_wc.lpszMenuName = 0;
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dummy_wc.lpszClassName = "dummy";
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dummy_wc.hIconSm = 0;
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dummy->wc_atom = RegisterClassEx (&dummy_wc);
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dummy->hwnd =
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CreateWindowEx (WS_EX_APPWINDOW,
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MAKEINTATOM (dummy->wc_atom),
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"",
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WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
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0,
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0,
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0,
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0,
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NULL,
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NULL,
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GetModuleHandle (NULL),
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NULL);
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}
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static gint
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_get_wgl_pfd (HDC hdc,
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const gboolean need_alpha_bits,
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PIXELFORMATDESCRIPTOR *pfd)
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{
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gint best_pf = 0;
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pfd->nSize = sizeof (PIXELFORMATDESCRIPTOR);
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pfd->nVersion = 1;
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pfd->dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER;
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pfd->iPixelType = PFD_TYPE_RGBA;
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pfd->cColorBits = GetDeviceCaps (hdc, BITSPIXEL);
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pfd->cAlphaBits = 8;
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pfd->dwLayerMask = PFD_MAIN_PLANE;
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best_pf = ChoosePixelFormat (hdc, pfd);
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if (best_pf == 0)
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/* give another chance if need_alpha_bits is FALSE,
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* meaning we prefer to have an alpha channel anyways
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*/
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if (!need_alpha_bits)
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{
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pfd->cAlphaBits = 0;
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best_pf = ChoosePixelFormat (hdc, pfd);
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}
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return best_pf;
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}
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/* in WGL, for many OpenGL items, we need a dummy WGL context, so create
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* one and cache it for later use
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*/
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static gint
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_gdk_init_dummy_context (GdkWGLDummy *dummy,
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const gboolean need_alpha_bits)
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{
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PIXELFORMATDESCRIPTOR pfd;
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gboolean set_pixel_format_result = FALSE;
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gint best_idx = 0;
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_get_dummy_window_hwnd (dummy);
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dummy->hdc = GetDC (dummy->hwnd);
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memset (&pfd, 0, sizeof (PIXELFORMATDESCRIPTOR));
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best_idx = _get_wgl_pfd (dummy->hdc, need_alpha_bits, &pfd);
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if (best_idx != 0)
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set_pixel_format_result = SetPixelFormat (dummy->hdc,
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best_idx,
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&pfd);
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if (best_idx == 0 || !set_pixel_format_result)
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return 0;
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dummy->hglrc = wglCreateContext (dummy->hdc);
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if (dummy->hglrc == NULL)
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return 0;
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dummy->inited = TRUE;
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return best_idx;
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}
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gboolean
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_gdk_win32_display_init_gl (GdkDisplay *display,
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const gboolean need_alpha_bits)
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{
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GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (display);
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gint best_idx = 0;
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GdkWGLDummy dummy;
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if (display_win32->have_wgl)
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return TRUE;
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memset (&dummy, 0, sizeof (GdkWGLDummy));
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/* acquire and cache dummy Window (HWND & HDC) and
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* dummy GL Context, it is used to query functions
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* and used for other stuff as well
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*/
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best_idx = _gdk_init_dummy_context (&dummy, need_alpha_bits);
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if (best_idx == 0 || !wglMakeCurrent (dummy.hdc, dummy.hglrc))
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return FALSE;
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display_win32->have_wgl = TRUE;
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display_win32->gl_version = epoxy_gl_version ();
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display_win32->hasWglARBCreateContext =
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epoxy_has_wgl_extension (dummy.hdc, "WGL_ARB_create_context");
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display_win32->hasWglEXTSwapControl =
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epoxy_has_wgl_extension (dummy.hdc, "WGL_EXT_swap_control");
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display_win32->hasWglOMLSyncControl =
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epoxy_has_wgl_extension (dummy.hdc, "WGL_OML_sync_control");
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GDK_NOTE (OPENGL,
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g_print ("WGL API version %d.%d found\n"
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" - Vendor: %s\n"
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" - Checked extensions:\n"
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"\t* WGL_ARB_create_context: %s\n"
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"\t* WGL_EXT_swap_control: %s\n"
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"\t* WGL_OML_sync_control: %s\n",
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display_win32->gl_version / 10,
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display_win32->gl_version % 10,
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glGetString (GL_VENDOR),
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display_win32->hasWglARBCreateContext ? "yes" : "no",
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display_win32->hasWglEXTSwapControl ? "yes" : "no",
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display_win32->hasWglOMLSyncControl ? "yes" : "no"));
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wglMakeCurrent (NULL, NULL);
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_destroy_dummy_gl_context (dummy);
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return TRUE;
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}
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static HGLRC
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_create_gl_context (HDC hdc,
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GdkGLContext *share,
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int flags,
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int major,
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int minor)
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{
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/* we still need a legacy WGL context first for all cases */
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HGLRC hglrc_base;
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/* This is the actual WGL context that we want */
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HGLRC hglrc;
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GdkWin32GLContext *context_win32;
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gint attribs[] = {
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WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
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WGL_CONTEXT_MAJOR_VERSION_ARB, major,
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WGL_CONTEXT_MINOR_VERSION_ARB, minor,
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WGL_CONTEXT_FLAGS_ARB, flags,
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0
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};
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hglrc_base = wglCreateContext (hdc);
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if (!wglMakeCurrent (hdc, hglrc_base))
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return NULL;
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if (share != NULL)
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context_win32 = GDK_WIN32_GL_CONTEXT (share);
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hglrc = wglCreateContextAttribsARB (hdc,
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share != NULL ? context_win32->hglrc : NULL,
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attribs);
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wglMakeCurrent (NULL, NULL);
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wglDeleteContext (hglrc_base);
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return hglrc;
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}
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static gboolean
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_set_pixformat_for_hdc (HDC hdc,
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gint *best_idx,
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const gboolean need_alpha_bits)
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{
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PIXELFORMATDESCRIPTOR pfd;
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gboolean set_pixel_format_result = FALSE;
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/* one is only allowed to call SetPixelFormat(), and so ChoosePixelFormat()
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* one single time per window HDC
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*/
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*best_idx = _get_wgl_pfd (hdc, need_alpha_bits, &pfd);
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if (*best_idx != 0)
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set_pixel_format_result = SetPixelFormat (hdc, *best_idx, &pfd);
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/* ChoosePixelFormat() or SetPixelFormat() failed, bail out */
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if (*best_idx == 0 || !set_pixel_format_result)
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return FALSE;
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return TRUE;
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}
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gboolean
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_gdk_win32_gl_context_realize (GdkGLContext *context,
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GError **error)
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{
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GdkGLContext *share = gdk_gl_context_get_shared_context (context);
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GdkWin32GLContext *context_win32 = GDK_WIN32_GL_CONTEXT (context);
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/* These are the real WGL context items that we will want to use later */
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HGLRC hglrc;
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gint pixel_format;
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gboolean debug_bit, compat_bit;
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/* request flags and specific versions for core (3.2+) WGL context */
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gint flags = 0;
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gint glver_major = 0;
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gint glver_minor = 0;
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if (!_set_pixformat_for_hdc (context_win32->gl_hdc,
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&pixel_format,
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context_win32->need_alpha_bits))
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{
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g_set_error_literal (error, GDK_GL_ERROR,
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GDK_GL_ERROR_UNSUPPORTED_FORMAT,
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_("No available configurations for the given pixel format"));
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return FALSE;
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}
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gdk_gl_context_get_required_version (context, &glver_major, &glver_minor);
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debug_bit = gdk_gl_context_get_debug_enabled (context);
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compat_bit = gdk_gl_context_get_forward_compatible (context);
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if (debug_bit)
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flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
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if (compat_bit)
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flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
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GDK_NOTE (OPENGL,
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g_print ("Creating core WGL context (version:%d.%d, debug:%s, forward:%s)\n",
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glver_major, glver_minor,
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debug_bit ? "yes" : "no",
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compat_bit ? "yes" : "no"));
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hglrc = _create_gl_context (context_win32->gl_hdc,
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share,
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flags,
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glver_major,
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glver_minor);
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|
if (hglrc == NULL)
|
|
{
|
|
g_set_error_literal (error, GDK_GL_ERROR,
|
|
GDK_GL_ERROR_NOT_AVAILABLE,
|
|
_("Unable to create a GL context"));
|
|
return FALSE;
|
|
}
|
|
|
|
GDK_NOTE (OPENGL,
|
|
g_print ("Created WGL context[%p], pixel_format=%d\n",
|
|
hglrc,
|
|
pixel_format));
|
|
|
|
context_win32->hglrc = hglrc;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GdkGLContext *
|
|
_gdk_win32_window_create_gl_context (GdkWindow *window,
|
|
gboolean attached,
|
|
GdkGLContext *share,
|
|
GError **error)
|
|
{
|
|
GdkDisplay *display = gdk_window_get_display (window);
|
|
GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (gdk_window_get_display (window));
|
|
GdkWin32GLContext *context = NULL;
|
|
GdkVisual *visual = gdk_window_get_visual (window);
|
|
|
|
gboolean need_alpha_bits = (visual == gdk_screen_get_rgba_visual (gdk_display_get_default_screen (display)));
|
|
|
|
/* Acquire and store up the Windows-specific HWND and HDC */
|
|
HWND hwnd;
|
|
HDC hdc;
|
|
|
|
if (!_gdk_win32_display_init_gl (display, need_alpha_bits))
|
|
{
|
|
g_set_error_literal (error, GDK_GL_ERROR,
|
|
GDK_GL_ERROR_NOT_AVAILABLE,
|
|
_("No GL implementation is available"));
|
|
return NULL;
|
|
}
|
|
|
|
/* We first check whether we have WGL_ARB_create_context... */
|
|
if (!display_win32->hasWglARBCreateContext)
|
|
{
|
|
g_set_error_literal (error, GDK_GL_ERROR,
|
|
GDK_GL_ERROR_UNSUPPORTED_PROFILE,
|
|
_("The WGL_ARB_create_context extension "
|
|
"needed to create core profiles is not "
|
|
"available"));
|
|
return NULL;
|
|
}
|
|
|
|
hwnd = GDK_WINDOW_HWND (window);
|
|
hdc = GetDC (hwnd);
|
|
|
|
display_win32->gl_hdc = hdc;
|
|
display_win32->gl_hwnd = hwnd;
|
|
|
|
context = g_object_new (GDK_TYPE_WIN32_GL_CONTEXT,
|
|
"display", display,
|
|
"window", window,
|
|
"shared-context", share,
|
|
NULL);
|
|
|
|
context->need_alpha_bits = need_alpha_bits;
|
|
context->gl_hdc = hdc;
|
|
context->is_attached = attached;
|
|
|
|
return GDK_GL_CONTEXT (context);
|
|
}
|
|
|
|
gboolean
|
|
_gdk_win32_display_make_gl_context_current (GdkDisplay *display,
|
|
GdkGLContext *context)
|
|
{
|
|
GdkWin32GLContext *context_win32;
|
|
GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (display);
|
|
GdkWindow *window;
|
|
GdkScreen *screen;
|
|
|
|
gboolean do_frame_sync = FALSE;
|
|
|
|
if (context == NULL)
|
|
{
|
|
wglMakeCurrent(NULL, NULL);
|
|
return TRUE;
|
|
}
|
|
|
|
context_win32 = GDK_WIN32_GL_CONTEXT (context);
|
|
|
|
if (!wglMakeCurrent (display_win32->gl_hdc, context_win32->hglrc))
|
|
{
|
|
GDK_NOTE (OPENGL,
|
|
g_print ("Making WGL context current failed\n"));
|
|
return FALSE;
|
|
}
|
|
|
|
context_win32->gl_hdc = display_win32->gl_hdc;
|
|
|
|
if (context_win32->is_attached && display_win32->hasWglEXTSwapControl)
|
|
{
|
|
window = gdk_gl_context_get_window (context);
|
|
|
|
/* If there 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);
|
|
|
|
if (do_frame_sync != context_win32->do_frame_sync)
|
|
{
|
|
context_win32->do_frame_sync = do_frame_sync;
|
|
|
|
if (do_frame_sync)
|
|
wglSwapIntervalEXT (1);
|
|
else
|
|
wglSwapIntervalEXT (0);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gdk_win32_display_get_wgl_version:
|
|
* @display: a #GdkDisplay
|
|
* @major: (out): return location for the WGL major version
|
|
* @minor: (out): return location for the WGL minor version
|
|
*
|
|
* Retrieves the version of the WGL implementation.
|
|
*
|
|
* Returns: %TRUE if WGL is available
|
|
*
|
|
* Since: 3.16
|
|
*/
|
|
gboolean
|
|
gdk_win32_display_get_wgl_version (GdkDisplay *display,
|
|
gint *major,
|
|
gint *minor)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
|
|
|
|
if (!GDK_IS_WIN32_DISPLAY (display))
|
|
return FALSE;
|
|
|
|
if (!_gdk_win32_display_init_gl (display, FALSE))
|
|
return FALSE;
|
|
|
|
if (major != NULL)
|
|
*major = GDK_WIN32_DISPLAY (display)->gl_version / 10;
|
|
if (minor != NULL)
|
|
*minor = GDK_WIN32_DISPLAY (display)->gl_version % 10;
|
|
|
|
return TRUE;
|
|
}
|