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macos: clip damage when swapping buffers

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This ensures that we only copy the changed area.
This commit is contained in:
Christian Hergert 2020-11-04 17:08:43 -08:00
parent 7444a151b2
commit 6309bd12ac
2 changed files with 38 additions and 6 deletions
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3
gdk/macos/gdkmacosglcontext-private.h
View File

@ -44,6 +44,9 @@ struct _GdkMacosGLContext
NSWindow *dummy_window;
NSView *dummy_view;
cairo_region_t *damage;
cairo_rectangle_int_t flush_rect;
guint is_attached : 1;
guint needs_resize : 1;
};

41
gdk/macos/gdkmacosglcontext.c
View File

@ -99,6 +99,7 @@ create_pixel_format (int major,
NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersionLegacy,
NSOpenGLPFAAccelerated,
NSOpenGLPFADoubleBuffer,
NSOpenGLPFABackingStore,
(NSOpenGLPixelFormatAttribute)nil
};
@ -262,11 +263,20 @@ gdk_macos_gl_context_begin_frame (GdkDrawContext *context,
/* If begin frame is called, that means we are trying to draw to
* the NSWindow using our view. That might be a GdkMacosCairoView
* but we need it to be a GL view.
* but we need it to be a GL view. Also, only in this case do we
* want to replace our damage region for the next frame (to avoid
* doing it multiple times).
*/
if (!self->is_attached &&
gdk_gl_context_get_shared_context (GDK_GL_CONTEXT (context)))
ensure_gl_view (self);
{
ensure_gl_view (self);
g_clear_pointer (&self->damage, cairo_region_destroy);
self->damage = cairo_region_copy (painted);
cairo_region_get_extents (painted, &self->flush_rect);
}
if (self->needs_resize)
{
@ -316,13 +326,14 @@ gdk_macos_gl_context_end_frame (GdkDrawContext *context,
GDK_DRAW_CONTEXT_CLASS (gdk_macos_gl_context_parent_class)->end_frame (context, painted);
/* We want to limit how much gets moved to the front buffer so here
* we adjust the clip rectangle before flushBuffer is called.
*/
G_STATIC_ASSERT (sizeof (GLint) == sizeof (int));
cairo_region_get_extents (painted, &extents);
[self->gl_context
setValues:(GLint *)&extents
setValues:(GLint *)&self->flush_rect
forParameter:NSOpenGLCPSwapRectangle];
[self->gl_context flushBuffer];
}
@ -334,6 +345,21 @@ gdk_macos_gl_context_surface_resized (GdkDrawContext *draw_context)
g_assert (GDK_IS_MACOS_GL_CONTEXT (self));
self->needs_resize = TRUE;
g_clear_pointer (&self->damage, cairo_region_destroy);
}
static cairo_region_t *
gdk_macos_gl_context_get_damage (GdkGLContext *context)
{
GdkMacosGLContext *self = (GdkMacosGLContext *)context;
g_assert (GDK_IS_MACOS_GL_CONTEXT (self));
if (self->damage != NULL)
return cairo_region_copy (self->damage);
return GDK_GL_CONTEXT_CLASS (gdk_macos_gl_context_parent_class)->get_damage (context);
}
static void
@ -364,6 +390,8 @@ gdk_macos_gl_context_dispose (GObject *gobject)
[gl_context release];
}
g_clear_pointer (&self->damage, cairo_region_destroy);
G_OBJECT_CLASS (gdk_macos_gl_context_parent_class)->dispose (gobject);
}
@ -380,6 +408,7 @@ gdk_macos_gl_context_class_init (GdkMacosGLContextClass *klass)
draw_context_class->end_frame = gdk_macos_gl_context_end_frame;
draw_context_class->surface_resized = gdk_macos_gl_context_surface_resized;
gl_class->get_damage = gdk_macos_gl_context_get_damage;
gl_class->realize = gdk_macos_gl_context_real_realize;
}