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gtk2/gdk/win32/gdkglcontext-win32.h

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Add OpenGL Support for the GDK Windows Backend This adds support for OpenGL to the GDK Windows backend using the WGL API calls, which enables programs that uses the GTK+ GLArea widgets to work on Windows as well. This also adds a simple utility function to query for the version of OpenGL that is supported by the Windows system, like the one provided by the X11 backend. Many thanks to Alex (and Emmanuele, who started the OpenGL integration in GTK+) who offered advice and help along the way, as well as the X11 and Wayland backend for this work to refer to and to model upon. https://bugzilla.gnome.org/show_bug.cgi?id=740795
2014-12-17 04:32:04 +00:00
/* GDK - The GIMP Drawing Kit
*
* gdkglcontext-win32.h: Private Win32 specific OpenGL wrappers
*
* Copyright © 2014 Chun-wei Fan
*
* 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_WIN32_GL_CONTEXT__
#define __GDK_WIN32_GL_CONTEXT__
#include <epoxy/gl.h>
#include <epoxy/wgl.h>
Add a EGL renderer (via ANGLE) for Windows This is for adding a EGL-based renderer which is done via the ANGLE project, which translate EGL calls to Direct3D 9/11. This is done as a possible solution to issue #105, especially for cases where the needed full GL extensions to map OpenGL to Direc3D is unavailable or unreliable, or when the OpenGL implementation from the graphics drivers are problematic. To enable this, do the following: -Build ANGLE and ensure the ANGLE libEGL.dll and libGLESv2.dll are available. A sufficiently-recent ANGLE is needed for things to work correctly--note that the copy of ANGLE that is included in qtbase-5.10.1 is sufficient. ANGLE is licensed under a BSD 3-clause license. Note also that Visual Studio 2013 or later is required to build ANGLE from QT-5.10.1, but the 2013-built ANGLE DLLs can work without without problems for GTK+ that is built with Visual Studio 2008 or later. -Build libepoxy on Windows with EGL support enabled. -Define GDK_WIN32_ENABLE_EGL when building gdk-win32.lib when building with Visual Studio, or pass in --enable-win32-gles during configure when building with MinGW/mingw-w64. -Prior to running GTK+ programs, the GDK_GL envvar needs to contain gles. Known issues: -Only OpenGL ES 3 is supported, ANGLE's ES 2 does not support the needed extensions, notably GL_OES_vertex_array_object, but its ES 3 support is sufficient. -There is no autodetection or fallback mechanism to enable using EGL/Angle automatically yet. There is no plans to do this in this commit. Thanks to LRN for pointing out that we should #include "win32/gdkwin32.h" instead of #include "gdkwin32.h" for gdkgl.c. LRN also did the autotools portion of this patch. Further notes about the autotools --enable-win32-gles option, fom LRN: This adds --enable-win32-gles option, which enables the code for GLES renderer. This commit also adds tests for WGL and EGL in epoxy. The absence of WGL is highly unlikely (it's enabled by default), but checking for EGL when GLES is enabled is necessary, as EGL is disabled in Windows builds of epoxy by default.
2018-04-27 15:30:32 +00:00
#ifdef GDK_WIN32_ENABLE_EGL
# include <epoxy/egl.h>
#endif
Add OpenGL Support for the GDK Windows Backend This adds support for OpenGL to the GDK Windows backend using the WGL API calls, which enables programs that uses the GTK+ GLArea widgets to work on Windows as well. This also adds a simple utility function to query for the version of OpenGL that is supported by the Windows system, like the one provided by the X11 backend. Many thanks to Alex (and Emmanuele, who started the OpenGL integration in GTK+) who offered advice and help along the way, as well as the X11 and Wayland backend for this work to refer to and to model upon. https://bugzilla.gnome.org/show_bug.cgi?id=740795
2014-12-17 04:32:04 +00:00
#include "gdkglcontextprivate.h"
#include "gdkdisplayprivate.h"
#include "gdkvisual.h"
#include "gdkwindow.h"
#include "gdkinternals.h"
#include "gdkmain.h"
G_BEGIN_DECLS
struct _GdkWin32GLContext
{
GdkGLContext parent_instance;
/* WGL Context Items */
HGLRC hglrc;
HDC gl_hdc;
GDK-Win32: Split GL context creation in two phases Like what is being done in the X11 and Wayland backends, create the GdkWin32GLContext in 2 steps, where we only create the actual WGL context in _gdk_win32_gl_context_realize(). https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-30 05:53:31 +00:00
guint need_alpha_bits : 1;
Add OpenGL Support for the GDK Windows Backend This adds support for OpenGL to the GDK Windows backend using the WGL API calls, which enables programs that uses the GTK+ GLArea widgets to work on Windows as well. This also adds a simple utility function to query for the version of OpenGL that is supported by the Windows system, like the one provided by the X11 backend. Many thanks to Alex (and Emmanuele, who started the OpenGL integration in GTK+) who offered advice and help along the way, as well as the X11 and Wayland backend for this work to refer to and to model upon. https://bugzilla.gnome.org/show_bug.cgi?id=740795
2014-12-17 04:32:04 +00:00
/* other items */
guint is_attached : 1;
guint do_frame_sync : 1;
guint do_blit_swap : 1;
Add a EGL renderer (via ANGLE) for Windows This is for adding a EGL-based renderer which is done via the ANGLE project, which translate EGL calls to Direct3D 9/11. This is done as a possible solution to issue #105, especially for cases where the needed full GL extensions to map OpenGL to Direc3D is unavailable or unreliable, or when the OpenGL implementation from the graphics drivers are problematic. To enable this, do the following: -Build ANGLE and ensure the ANGLE libEGL.dll and libGLESv2.dll are available. A sufficiently-recent ANGLE is needed for things to work correctly--note that the copy of ANGLE that is included in qtbase-5.10.1 is sufficient. ANGLE is licensed under a BSD 3-clause license. Note also that Visual Studio 2013 or later is required to build ANGLE from QT-5.10.1, but the 2013-built ANGLE DLLs can work without without problems for GTK+ that is built with Visual Studio 2008 or later. -Build libepoxy on Windows with EGL support enabled. -Define GDK_WIN32_ENABLE_EGL when building gdk-win32.lib when building with Visual Studio, or pass in --enable-win32-gles during configure when building with MinGW/mingw-w64. -Prior to running GTK+ programs, the GDK_GL envvar needs to contain gles. Known issues: -Only OpenGL ES 3 is supported, ANGLE's ES 2 does not support the needed extensions, notably GL_OES_vertex_array_object, but its ES 3 support is sufficient. -There is no autodetection or fallback mechanism to enable using EGL/Angle automatically yet. There is no plans to do this in this commit. Thanks to LRN for pointing out that we should #include "win32/gdkwin32.h" instead of #include "gdkwin32.h" for gdkgl.c. LRN also did the autotools portion of this patch. Further notes about the autotools --enable-win32-gles option, fom LRN: This adds --enable-win32-gles option, which enables the code for GLES renderer. This commit also adds tests for WGL and EGL in epoxy. The absence of WGL is highly unlikely (it's enabled by default), but checking for EGL when GLES is enabled is necessary, as EGL is disabled in Windows builds of epoxy by default.
2018-04-27 15:30:32 +00:00
#ifdef GDK_WIN32_ENABLE_EGL
/* EGL (Angle) Context Items */
EGLContext egl_context;
EGLConfig egl_config;
#endif
Add OpenGL Support for the GDK Windows Backend This adds support for OpenGL to the GDK Windows backend using the WGL API calls, which enables programs that uses the GTK+ GLArea widgets to work on Windows as well. This also adds a simple utility function to query for the version of OpenGL that is supported by the Windows system, like the one provided by the X11 backend. Many thanks to Alex (and Emmanuele, who started the OpenGL integration in GTK+) who offered advice and help along the way, as well as the X11 and Wayland backend for this work to refer to and to model upon. https://bugzilla.gnome.org/show_bug.cgi?id=740795
2014-12-17 04:32:04 +00:00
};
struct _GdkWin32GLContextClass
{
GdkGLContextClass parent_class;
};
GdkGLContext *
_gdk_win32_window_create_gl_context (GdkWindow *window,
gboolean attached,
GdkGLContext *share,
GError **error);
void
_gdk_win32_window_invalidate_for_new_frame (GdkWindow *window,
cairo_region_t *update_area);
void
_gdk_win32_gl_context_end_frame (GdkGLContext *context,
cairo_region_t *painted,
cairo_region_t *damage);
gboolean
_gdk_win32_display_make_gl_context_current (GdkDisplay *display,
GdkGLContext *context);
GDK-Win32: Split GL context creation in two phases Like what is being done in the X11 and Wayland backends, create the GdkWin32GLContext in 2 steps, where we only create the actual WGL context in _gdk_win32_gl_context_realize(). https://bugzilla.gnome.org/show_bug.cgi?id=741946
2015-01-30 05:53:31 +00:00
gboolean
_gdk_win32_gl_context_realize (GdkGLContext *context,
GError **error);
GDK-Win32: Fix glitches when using EGL/ANGLE We need to force redraws of the whole window when we are using EGL/ANGLE during maximize, restore and Aerosnap ops so that we do not get glitches in the resulting window.
2018-05-22 10:05:35 +00:00
void
_gdk_win32_window_invalidate_egl_framebuffer (GdkWindow *window);
Add OpenGL Support for the GDK Windows Backend This adds support for OpenGL to the GDK Windows backend using the WGL API calls, which enables programs that uses the GTK+ GLArea widgets to work on Windows as well. This also adds a simple utility function to query for the version of OpenGL that is supported by the Windows system, like the one provided by the X11 backend. Many thanks to Alex (and Emmanuele, who started the OpenGL integration in GTK+) who offered advice and help along the way, as well as the X11 and Wayland backend for this work to refer to and to model upon. https://bugzilla.gnome.org/show_bug.cgi?id=740795
2014-12-17 04:32:04 +00:00
G_END_DECLS
#endif /* __GDK_WIN32_GL_CONTEXT__ */
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