[quartz] Set the sRGB colorspace on the IOSurface.

Enables colorspace tranformation in Core Animation. This transform
is executed on the GPU and unlike the Core Graphics one has no
affect on performance.

Fixes #5579

diff --git a/gdk/quartz/GdkQuartzView.c b/gdk/quartz/GdkQuartzView.c
index 81c2d320078e18cbe74ee0141e5899f740670c8b..f8c53841f3d703fd6840d94cc2be93c7777b7001 100644 (file)
--- a/gdk/quartz/GdkQuartzView.c
+++ b/gdk/quartz/GdkQuartzView.c
@@ -548,6 +548,8 @@ copy_rectangle_argb32 (cairo_surface_t *dest, cairo_surface_t *source,
 
 -(void)createBackingStoreWithWidth: (CGFloat) width andHeight: (CGFloat) height
 {
+  IOSurfaceRef surface;
+
   g_return_if_fail (width && height);
 
   CVPixelBufferRelease (pixels);
@@ -555,6 +557,9 @@ copy_rectangle_argb32 (cairo_surface_t *dest, cairo_surface_t *source,
                        kCVPixelFormatType_32BGRA,
                        cfpb_props, &pixels);
 
+  surface = CVPixelBufferGetIOSurface (pixels);
+  IOSurfaceSetValue(surface, CFSTR("IOSurfaceColorSpace"),
+                    kCGColorSpaceSRGB);
 }
 
 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 10700