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gtk/gdk/x11/gdkglcontext-egl.c
Benjamin Otte 9c4c4eaaa1 gl: Fix issue with EGL + nvidia 
nvidia sets the default draw buffer to GL_NONE if EGL contexts are
initially bound to EGL_NO_SURFACE which is exactly what we are doing. So
bind them to GL_BACK when drawing, as they should be.

See https://phabricator.services.mozilla.com/D118743 for a discussion
about EGL_NO_CONTEXT and draw buffers.
2021-07-22 16:28:16 +02:00

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/* GDK - The GIMP Drawing Kit
*
* gdkglcontext-egl.c: EGL-X11 specific wrappers
*
* SPDX-FileCopyrightText: 2014 Emmanuele Bassi
* SPDX-FileCopyrightText: 2021 GNOME Foundation
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "gdkglcontext-x11.h"
#include "gdkdisplay-x11.h"
#include "gdkprivate-x11.h"
#include "gdkscreen-x11.h"
#include "gdkx11display.h"
#include "gdkx11glcontext.h"
#include "gdkx11screen.h"
#include "gdkx11surface.h"
#include "gdkx11property.h"
#include <X11/Xatom.h>
#include "gdkinternals.h"
#include "gdkprofilerprivate.h"
#include "gdkintl.h"
#include <cairo-xlib.h>
#include <epoxy/egl.h>
struct _GdkX11GLContextEGL
{
GdkX11GLContext parent_instance;
EGLContext egl_context;
guint do_frame_sync : 1;
};
typedef struct _GdkX11GLContextClass GdkX11GLContextEGLClass;
G_DEFINE_TYPE (GdkX11GLContextEGL, gdk_x11_gl_context_egl, GDK_TYPE_X11_GL_CONTEXT)
/**
* gdk_x11_display_get_egl_display:
* @display: (type GdkX11Display): an X11 display
*
* Retrieves the EGL display connection object for the given GDK display.
*
* This function returns `NULL` if GDK is using GLX.
*
* Returns: (nullable): the EGL display object
*
* Since: 4.4
*/
gpointer
gdk_x11_display_get_egl_display (GdkDisplay *display)
{
GdkX11Display *self;
g_return_val_if_fail (GDK_IS_X11_DISPLAY (display), NULL);
self = GDK_X11_DISPLAY (display);
return self->egl_display;
}
static void
gdk_x11_display_create_egl_display (GdkX11Display *self)
{
Display *dpy;
g_assert (self->egl_display == NULL);
dpy = gdk_x11_display_get_xdisplay (GDK_DISPLAY (self));
if (epoxy_has_egl_extension (NULL, "EGL_KHR_platform_base"))
{
PFNEGLGETPLATFORMDISPLAYPROC getPlatformDisplay =
(void *) eglGetProcAddress ("eglGetPlatformDisplay");
if (getPlatformDisplay != NULL)
self->egl_display = getPlatformDisplay (EGL_PLATFORM_X11_KHR, dpy, NULL);
if (self->egl_display != NULL)
return;
}
if (epoxy_has_egl_extension (NULL, "EGL_EXT_platform_base"))
{
PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplay =
(void *) eglGetProcAddress ("eglGetPlatformDisplayEXT");
if (getPlatformDisplay)
self->egl_display = getPlatformDisplay (EGL_PLATFORM_X11_EXT, dpy, NULL);
if (self->egl_display != NULL)
return;
}
self->egl_display = eglGetDisplay ((EGLNativeDisplayType) dpy);
}
static XVisualInfo *
gdk_x11_display_get_visual_info_for_visual (GdkX11Display *self,
VisualID visualid)
{
XVisualInfo template, *visinfo;
int nvisuals;
template.screen = self->screen->screen_num;
template.visualid = visualid;
visinfo = XGetVisualInfo (gdk_x11_display_get_xdisplay (GDK_DISPLAY (self)),
VisualScreenMask | VisualIDMask,
&template,
&nvisuals);
g_warn_if_fail (nvisuals == 1);
return visinfo;
}
static gboolean
visual_is_rgba (XVisualInfo *visinfo)
{
return
visinfo->depth == 32 &&
visinfo->visual->red_mask == 0xff0000 &&
visinfo->visual->green_mask == 0x00ff00 &&
visinfo->visual->blue_mask == 0x0000ff;
}
#define MAX_EGL_ATTRS 30
static gboolean
gdk_x11_display_create_egl_config (GdkX11Display *display,
gboolean force,
Visual **out_visual,
int *out_depth,
GError **error)
{
GdkX11Display *self = GDK_X11_DISPLAY (display);
EGLint attrs[MAX_EGL_ATTRS];
EGLConfig *configs;
EGLint count, alloced;
enum {
NO_VISUAL_FOUND,
WITH_MULTISAMPLING,
WITH_STENCIL_AND_DEPTH_BUFFER,
NO_ALPHA,
NO_ALPHA_VISUAL,
PERFECT
} best_features;
int i = 0;
attrs[i++] = EGL_SURFACE_TYPE;
attrs[i++] = EGL_WINDOW_BIT;
attrs[i++] = EGL_COLOR_BUFFER_TYPE;
attrs[i++] = EGL_RGB_BUFFER;
attrs[i++] = EGL_RED_SIZE;
attrs[i++] = 8;
attrs[i++] = EGL_GREEN_SIZE;
attrs[i++] = 8;
attrs[i++] = EGL_BLUE_SIZE;
attrs[i++] = 8;
attrs[i++] = EGL_ALPHA_SIZE;
attrs[i++] = 8;
attrs[i++] = EGL_NONE;
g_assert (i < MAX_EGL_ATTRS);
if (!eglChooseConfig (self->egl_display, attrs, NULL, -1, &alloced) || alloced == 0)
{
g_set_error_literal (error, GDK_GL_ERROR, GDK_GL_ERROR_NOT_AVAILABLE,
_("No EGL configuration available"));
return FALSE;
}
configs = g_new (EGLConfig, alloced);
if (!eglChooseConfig (self->egl_display, attrs, configs, alloced, &count))
{
g_set_error_literal (error, GDK_GL_ERROR, GDK_GL_ERROR_NOT_AVAILABLE,
_("Failed to get EGL configurations"));
return FALSE;
}
g_warn_if_fail (alloced == count);
best_features = NO_VISUAL_FOUND;
for (i = 0; i < count; i++)
{
XVisualInfo *visinfo;
int tmp, visualid;
if (!eglGetConfigAttrib (self->egl_display, configs[i], EGL_NATIVE_VISUAL_ID, &visualid))
continue;
visinfo = gdk_x11_display_get_visual_info_for_visual (self, visualid);
if (visinfo == NULL)
continue;
if (!eglGetConfigAttrib (self->egl_display, configs[i], EGL_SAMPLE_BUFFERS, &tmp) || tmp != 0)
{
if (best_features < WITH_MULTISAMPLING)
{
GDK_NOTE (OPENGL, g_message ("Best EGL config is %u for visual 0x%lX with multisampling", i, visinfo->visualid));
best_features = WITH_MULTISAMPLING;
*out_visual = visinfo->visual;
*out_depth = visinfo->depth;
self->egl_config = configs[i];
}
XFree (visinfo);
continue;
}
if (!eglGetConfigAttrib (self->egl_display, configs[i], EGL_DEPTH_SIZE, &tmp) || tmp != 0 ||
!eglGetConfigAttrib (self->egl_display, configs[i], EGL_STENCIL_SIZE, &tmp) || tmp != 0)
{
GDK_NOTE (OPENGL, g_message ("Best EGL config is %u for visual 0x%lX with stencil or depth buffer", i, visinfo->visualid));
if (best_features < WITH_STENCIL_AND_DEPTH_BUFFER)
{
best_features = WITH_STENCIL_AND_DEPTH_BUFFER;
*out_visual = visinfo->visual;
*out_depth = visinfo->depth;
self->egl_config = configs[i];
}
XFree (visinfo);
continue;
}
if (!visual_is_rgba (visinfo))
{
GDK_NOTE (OPENGL, g_message ("Best EGL config is %u for visual 0x%lX without RGBA Visual", i, visinfo->visualid));
if (best_features < NO_ALPHA_VISUAL)
{
best_features = NO_ALPHA_VISUAL;
*out_visual = visinfo->visual;
*out_depth = visinfo->depth;
self->egl_config = configs[i];
}
XFree (visinfo);
continue;
}
GDK_NOTE (OPENGL, g_message ("EGL Config %u for visual 0x%lX is the perfect choice", i, visinfo->visualid));
*out_visual = visinfo->visual;
*out_depth = visinfo->depth;
self->egl_config = configs[i];
XFree (visinfo);
/* everything is perfect */
best_features = PERFECT;
break;
}
g_free (configs);
if (best_features == NO_VISUAL_FOUND)
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("No EGL configuration with required features found"));
return FALSE;
}
else if (!force && best_features != PERFECT)
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("No perfect EGL configuration found"));
return FALSE;
}
return TRUE;
}
#undef MAX_EGL_ATTRS
static EGLSurface
gdk_x11_surface_get_egl_surface (GdkSurface *surface)
{
GdkX11Surface *self = GDK_X11_SURFACE (surface);
GdkDisplay *display = gdk_surface_get_display (GDK_SURFACE (self));
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (self->egl_surface)
return self->egl_surface;
self->egl_surface =
eglCreateWindowSurface (display_x11->egl_display,
display_x11->egl_config,
(EGLNativeWindowType) gdk_x11_surface_get_xid (surface),
NULL);
return self->egl_surface;
}
void
gdk_x11_surface_destroy_egl_surface (GdkX11Surface *self)
{
GdkX11Display *display_x11;
if (self->egl_surface == NULL)
return;
display_x11 = GDK_X11_DISPLAY (gdk_surface_get_display (GDK_SURFACE (self)));
eglDestroySurface (display_x11->egl_display, self->egl_surface);
self->egl_surface = NULL;
}
static void
gdk_x11_gl_context_egl_begin_frame (GdkDrawContext *draw_context,
cairo_region_t *region)
{
GDK_DRAW_CONTEXT_CLASS (gdk_x11_gl_context_egl_parent_class)->begin_frame (draw_context, region);
glDrawBuffers (1, (GLenum[1]) { GL_BACK });
}
static void
gdk_x11_gl_context_egl_end_frame (GdkDrawContext *draw_context,
cairo_region_t *painted)
{
GdkGLContext *context = GDK_GL_CONTEXT (draw_context);
GdkSurface *surface = gdk_gl_context_get_surface (context);
GdkDisplay *display = gdk_surface_get_display (surface);
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
EGLSurface egl_surface;
GDK_DRAW_CONTEXT_CLASS (gdk_x11_gl_context_egl_parent_class)->end_frame (draw_context, painted);
gdk_gl_context_make_current (context);
egl_surface = gdk_x11_surface_get_egl_surface (surface);
gdk_profiler_add_mark (GDK_PROFILER_CURRENT_TIME, 0, "x11", "swap buffers");
if (display_x11->has_egl_swap_buffers_with_damage)
{
int i, j, n_rects = cairo_region_num_rectangles (painted);
int surface_height = gdk_surface_get_height (surface);
int scale = gdk_surface_get_scale_factor (surface);
EGLint stack_rects[4 * 4]; /* 4 rects */
EGLint *heap_rects = NULL;
EGLint *rects;
if (n_rects < G_N_ELEMENTS (stack_rects) / 4)
rects = (EGLint *) &stack_rects;
else
rects = heap_rects = g_new (EGLint, n_rects * 4);
for (i = 0, j = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (painted, i, &rect);
rects[j++] = rect.x * scale;
rects[j++] = (surface_height - rect.height - rect.y) * scale;
rects[j++] = rect.width * scale;
rects[j++] = rect.height * scale;
}
eglSwapBuffersWithDamageEXT (display_x11->egl_display, egl_surface, rects, n_rects);
g_free (heap_rects);
}
else
eglSwapBuffers (display_x11->egl_display, egl_surface);
}
static gboolean
gdk_x11_gl_context_egl_clear_current (GdkGLContext *context)
{
GdkDisplay *display = gdk_gl_context_get_display (context);
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
return eglMakeCurrent (display_x11->egl_display,
EGL_NO_SURFACE,
EGL_NO_SURFACE,
EGL_NO_CONTEXT);
}
static gboolean
gdk_x11_gl_context_egl_make_current (GdkGLContext *context,
gboolean surfaceless)
{
GdkX11GLContextEGL *self = GDK_X11_GL_CONTEXT_EGL (context);
GdkDisplay *display = gdk_gl_context_get_display (context);
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
GdkSurface *surface;
EGLSurface egl_surface;
gboolean do_frame_sync = FALSE;
if (surfaceless)
{
return eglMakeCurrent (display_x11->egl_display,
EGL_NO_SURFACE,
EGL_NO_SURFACE,
self->egl_context);
}
surface = gdk_gl_context_get_surface (context);
egl_surface = gdk_x11_surface_get_egl_surface (surface);
GDK_DISPLAY_NOTE (display, OPENGL,
g_message ("Making EGL context %p current to surface %p",
self->egl_context, egl_surface));
if (!eglMakeCurrent (display_x11->egl_display,
egl_surface,
egl_surface,
self->egl_context))
return FALSE;
/* 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. */
do_frame_sync = ! gdk_display_is_composited (display);
if (do_frame_sync != self->do_frame_sync)
{
self->do_frame_sync = do_frame_sync;
if (do_frame_sync)
eglSwapInterval (display_x11->egl_display, 1);
else
eglSwapInterval (display_x11->egl_display, 0);
}
return TRUE;
}
static cairo_region_t *
gdk_x11_gl_context_egl_get_damage (GdkGLContext *context)
{
GdkDisplay *display = gdk_draw_context_get_display (GDK_DRAW_CONTEXT (context));
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (display_x11->has_egl_buffer_age)
{
GdkSurface *surface = gdk_draw_context_get_surface (GDK_DRAW_CONTEXT (context));
EGLSurface egl_surface;
int buffer_age = 0;
egl_surface = gdk_x11_surface_get_egl_surface (surface);
gdk_gl_context_make_current (context);
eglQuerySurface (display_x11->egl_display,
egl_surface,
EGL_BUFFER_AGE_EXT,
&buffer_age);
switch (buffer_age)
{
case 1:
return cairo_region_create ();
case 2:
if (context->old_updated_area[0])
return cairo_region_copy (context->old_updated_area[0]);
break;
case 3:
if (context->old_updated_area[0] && context->old_updated_area[1])
{
cairo_region_t *damage = cairo_region_copy (context->old_updated_area[0]);
cairo_region_union (damage, context->old_updated_area[1]);
return damage;
}
break;
default:
break;
}
}
return GDK_GL_CONTEXT_CLASS (gdk_x11_gl_context_egl_parent_class)->get_damage (context);
}
#define N_EGL_ATTRS 16
static gboolean
gdk_x11_gl_context_egl_realize (GdkGLContext *context,
GError **error)
{
GdkX11Display *display_x11;
GdkDisplay *display;
GdkX11GLContextEGL *context_egl;
GdkGLContext *share;
gboolean debug_bit, forward_bit, legacy_bit, use_es;
int major, minor, i = 0;
EGLint context_attrs[N_EGL_ATTRS];
display = gdk_gl_context_get_display (context);
context_egl = GDK_X11_GL_CONTEXT_EGL (context);
display_x11 = GDK_X11_DISPLAY (display);
share = gdk_display_get_gl_context (display);
gdk_gl_context_get_required_version (context, &major, &minor);
debug_bit = gdk_gl_context_get_debug_enabled (context);
forward_bit = gdk_gl_context_get_forward_compatible (context);
legacy_bit = GDK_DISPLAY_DEBUG_CHECK (display, GL_LEGACY) ||
(share != NULL && gdk_gl_context_is_legacy (share));
use_es = GDK_DISPLAY_DEBUG_CHECK (display, GL_GLES) ||
(share != NULL && gdk_gl_context_get_use_es (share));
if (!use_es)
{
eglBindAPI (EGL_OPENGL_API);
if (display_x11->has_egl_khr_create_context)
{
int flags = 0;
if (debug_bit)
flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
if (forward_bit)
flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
context_attrs[i++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
context_attrs[i++] = legacy_bit
? EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR
: EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
context_attrs[i++] = EGL_CONTEXT_MAJOR_VERSION_KHR;
context_attrs[i++] = legacy_bit ? 3 : major;
context_attrs[i++] = EGL_CONTEXT_MINOR_VERSION_KHR;
context_attrs[i++] = legacy_bit ? 0 : minor;
context_attrs[i++] = EGL_CONTEXT_FLAGS_KHR;
context_attrs[i++] = flags;
context_attrs[i++] = EGL_NONE;
}
else
{
context_attrs[i++] = EGL_NONE;
}
}
else
{
eglBindAPI (EGL_OPENGL_ES_API);
context_attrs[i++] = EGL_CONTEXT_CLIENT_VERSION;
if (major == 3)
context_attrs[i++] = 3;
else
context_attrs[i++] = 2;
}
context_attrs[i++] = EGL_NONE;
g_assert (i < N_EGL_ATTRS);
GDK_DISPLAY_NOTE (display, OPENGL,
g_message ("Creating EGL context version %d.%d (shared:%s, debug:%s, forward:%s, legacy:%s, es:%s)",
major, minor,
share != NULL ? "yes" : "no",
debug_bit ? "yes" : "no",
forward_bit ? "yes" : "no",
legacy_bit ? "yes" : "no",
use_es ? "yes" : "no"));
context_egl->egl_context =
eglCreateContext (display_x11->egl_display,
display_x11->egl_config,
share != NULL
? GDK_X11_GL_CONTEXT_EGL (share)->egl_context
: EGL_NO_CONTEXT,
context_attrs);
/* If we're not asking for a GLES context, and we don't have the legacy bit set
* already, try again with a legacy context
*/
if (context_egl->egl_context == NULL && !use_es && !legacy_bit)
{
context_attrs[1] = EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR;
context_attrs[3] = 3;
context_attrs[5] = 0;
legacy_bit = TRUE;
use_es = FALSE;
GDK_NOTE (OPENGL,
g_message ("Context creation failed; trying legacy EGL context"));
context_egl->egl_context =
eglCreateContext (display_x11->egl_display,
display_x11->egl_config,
share != NULL
? GDK_X11_GL_CONTEXT_EGL (share)->egl_context
: EGL_NO_CONTEXT,
context_attrs);
}
if (context_egl->egl_context == NULL)
{
g_set_error_literal (error, GDK_GL_ERROR, GDK_GL_ERROR_NOT_AVAILABLE,
_("Unable to create a GL context"));
return FALSE;
}
gdk_gl_context_set_is_legacy (context, legacy_bit);
gdk_gl_context_set_use_es (context, use_es);
GDK_NOTE (OPENGL,
g_message ("Realized EGL context[%p]",
context_egl->egl_context));
return TRUE;
}
#undef N_EGL_ATTRS
static void
gdk_x11_gl_context_egl_dispose (GObject *gobject)
{
GdkX11GLContextEGL *context_egl = GDK_X11_GL_CONTEXT_EGL (gobject);
if (context_egl->egl_context != NULL)
{
GdkGLContext *context = GDK_GL_CONTEXT (gobject);
GdkX11Display *display_x11 = GDK_X11_DISPLAY (gdk_gl_context_get_display (context));
/* Unset the current context if we're disposing it */
if (eglGetCurrentContext () == context_egl->egl_context)
eglMakeCurrent (display_x11->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
GDK_NOTE (OPENGL, g_message ("Destroying EGL context"));
eglDestroyContext (display_x11->egl_display, context_egl->egl_context);
context_egl->egl_context = NULL;
}
G_OBJECT_CLASS (gdk_x11_gl_context_egl_parent_class)->dispose (gobject);
}
static void
gdk_x11_gl_context_egl_class_init (GdkX11GLContextEGLClass *klass)
{
GdkGLContextClass *context_class = GDK_GL_CONTEXT_CLASS (klass);
GdkDrawContextClass *draw_context_class = GDK_DRAW_CONTEXT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
context_class->realize = gdk_x11_gl_context_egl_realize;
context_class->make_current = gdk_x11_gl_context_egl_make_current;
context_class->clear_current = gdk_x11_gl_context_egl_clear_current;
context_class->get_damage = gdk_x11_gl_context_egl_get_damage;
draw_context_class->begin_frame = gdk_x11_gl_context_egl_begin_frame;
draw_context_class->end_frame = gdk_x11_gl_context_egl_end_frame;
gobject_class->dispose = gdk_x11_gl_context_egl_dispose;
}
static void
gdk_x11_gl_context_egl_init (GdkX11GLContextEGL *self)
{
self->do_frame_sync = TRUE;
}
gboolean
gdk_x11_display_init_egl (GdkX11Display *self,
gboolean force,
Visual **out_visual,
int *out_depth,
GError **error)
{
GdkDisplay *display = GDK_DISPLAY (self);
Display *dpy;
int major, minor;
dpy = gdk_x11_display_get_xdisplay (display);
if (!epoxy_has_egl ())
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("EGL is not supported"));
return FALSE;
}
gdk_x11_display_create_egl_display (self);
if (self->egl_display == NULL)
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("Failed to create EGL display"));
return FALSE;
}
if (!eglInitialize (self->egl_display, &major, &minor))
{
self->egl_display = NULL;
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("Could not initialize EGL display"));
return FALSE;
}
if (major < GDK_EGL_MIN_VERSION_MAJOR ||
(major == GDK_EGL_MIN_VERSION_MAJOR && minor < GDK_EGL_MIN_VERSION_MINOR))
{
eglTerminate (dpy);
self->egl_display = NULL;
g_set_error (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("EGL version %d.%d is too old. GTK requires %d.%d"),
major, minor, GDK_EGL_MIN_VERSION_MAJOR, GDK_EGL_MIN_VERSION_MINOR);
return FALSE;
}
if (!epoxy_has_egl_extension (self->egl_display, "EGL_KHR_surfaceless_context"))
{
eglTerminate (dpy);
self->egl_display = NULL;
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_UNSUPPORTED_PROFILE,
_("Surfaceless contexts are not supported on this EGL implementation"));
return FALSE;
}
if (!gdk_x11_display_create_egl_config (self, force, out_visual, out_depth, error))
{
eglTerminate (self->egl_display);
self->egl_display = NULL;
return FALSE;
}
self->egl_version = epoxy_egl_version (dpy);
self->has_egl_khr_create_context =
epoxy_has_egl_extension (self->egl_display, "EGL_KHR_create_context");
self->has_egl_buffer_age =
epoxy_has_egl_extension (self->egl_display, "EGL_EXT_buffer_age");
self->has_egl_swap_buffers_with_damage =
epoxy_has_egl_extension (self->egl_display, "EGL_EXT_swap_buffers_with_damage");
GDK_DISPLAY_NOTE (display, OPENGL,
g_message ("EGL found\n"
" - Version: %s\n"
" - Vendor: %s\n"
" - Client API: %s\n"
" - Checked extensions:\n"
"\t* EGL_KHR_create_context: %s\n"
"\t* EGL_EXT_buffer_age: %s\n"
"\t* EGL_EXT_swap_buffers_with_damage: %s\n",
eglQueryString (self->egl_display, EGL_VERSION),
eglQueryString (self->egl_display, EGL_VENDOR),
eglQueryString (self->egl_display, EGL_CLIENT_APIS),
self->has_egl_khr_create_context ? "yes" : "no",
self->has_egl_buffer_age ? "yes" : "no",
self->has_egl_swap_buffers_with_damage ? "yes" : "no"));
return TRUE;
}
/**
* gdk_x11_display_get_egl_version:
* @display: (type GdkX11Display): a `GdkDisplay`
* @major: (out): return location for the EGL major version
* @minor: (out): return location for the EGL minor version
*
* Retrieves the version of the EGL implementation.
*
* Returns: %TRUE if EGL is available
*
* Since: 4.4
*/
gboolean
gdk_x11_display_get_egl_version (GdkDisplay *display,
int *major,
int *minor)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
if (!GDK_IS_X11_DISPLAY (display))
return FALSE;
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (display_x11->egl_display == NULL)
return FALSE;
if (major != NULL)
*major = display_x11->egl_version / 10;
if (minor != NULL)
*minor = display_x11->egl_version % 10;
return TRUE;
}
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