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gl: Fix issue with EGL + nvidia

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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.
This commit is contained in:
Benjamin Otte
2021-07-10 02:29:17 +02:00
parent 969b3257a7
commit 9c4c4eaaa1
2 changed files with 21 additions and 0 deletions
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11
gdk/wayland/gdkglcontext-wayland.c
View File

@@ -276,6 +276,16 @@ gdk_wayland_gl_context_make_current (GdkGLContext *context,
egl_surface,
context_wayland->egl_context);
}
static void
gdk_wayland_gl_context_begin_frame (GdkDrawContext *draw_context,
cairo_region_t *region)
{
GDK_DRAW_CONTEXT_CLASS (gdk_wayland_gl_context_parent_class)->begin_frame (draw_context, region);
glDrawBuffers (1, (GLenum[1]) { GL_BACK });
}
static void
gdk_wayland_gl_context_end_frame (GdkDrawContext *draw_context,
cairo_region_t *painted)
@@ -337,6 +347,7 @@ gdk_wayland_gl_context_class_init (GdkWaylandGLContextClass *klass)
gobject_class->dispose = gdk_wayland_gl_context_dispose;
draw_context_class->begin_frame = gdk_wayland_gl_context_begin_frame;
draw_context_class->end_frame = gdk_wayland_gl_context_end_frame;
context_class->realize = gdk_wayland_gl_context_realize;

10
gdk/x11/gdkglcontext-egl.c
View File

@@ -312,6 +312,15 @@ gdk_x11_surface_destroy_egl_surface (GdkX11Surface *self)
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)
@@ -638,6 +647,7 @@ gdk_x11_gl_context_egl_class_init (GdkX11GLContextEGLClass *klass)
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;