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macos: fix rendering artifacts with hover transitions

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Using an image surface seems to fix some rendering artifacts when
performing cross-fade CSS transitions.
This commit is contained in:
Christian Hergert 2020-11-17 18:20:55 -08:00
parent 3003f37e9d
commit dd7f52c59a
1 changed files with 6 additions and 2 deletions
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8
gdk/macos/gdkmacoscairocontext.c
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@ -23,7 +23,6 @@
#include "gdkconfig.h"
#include <CoreGraphics/CoreGraphics.h>
#include <cairo-quartz.h>
#import "GdkMacosCairoView.h"
@ -58,7 +57,12 @@ create_cairo_surface_for_surface (GdkSurface *surface)
width = scale * gdk_surface_get_width (surface);
height = scale * gdk_surface_get_height (surface);
cairo_surface = cairo_quartz_surface_create (CAIRO_FORMAT_ARGB32, width, height);
/* We use a cairo image surface here instead of a quartz surface because we
* get strange artifacts with the quartz surface such as empty cross-fades
* when hovering buttons. For performance, we want to be using GL rendering
* so there isn't much point here as correctness is better.
*/
cairo_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
if (cairo_surface != NULL)
cairo_surface_set_device_scale (cairo_surface, scale, scale);