diff options
Diffstat (limited to 'gnu/java/awt/peer/gtk/VolatileImageGraphics.java')
| -rw-r--r-- | gnu/java/awt/peer/gtk/VolatileImageGraphics.java | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/gnu/java/awt/peer/gtk/VolatileImageGraphics.java b/gnu/java/awt/peer/gtk/VolatileImageGraphics.java index 560d31750..3a9f9d693 100644 --- a/gnu/java/awt/peer/gtk/VolatileImageGraphics.java +++ b/gnu/java/awt/peer/gtk/VolatileImageGraphics.java @@ -282,12 +282,12 @@ public class VolatileImageGraphics extends ComponentGraphics if (buffer == null) { WritableRaster rst; - rst = Raster.createWritableRaster(CairoSurface. - createNativeSampleModel(owner.width, + rst = Raster.createWritableRaster(GtkVolatileImage.createGdkSampleModel(owner.width, owner.height), new Point(0,0)); - buffer = new BufferedImage(CairoSurface.nativeColorModel, rst, true, + buffer = new BufferedImage(GtkVolatileImage.gdkColorModel, rst, + GtkVolatileImage.gdkColorModel.isAlphaPremultiplied(), new Hashtable()); } else @@ -301,7 +301,12 @@ public class VolatileImageGraphics extends ComponentGraphics protected ColorModel getNativeCM() { - return CairoSurface.nativeColorModel; + // We should really return GtkVolatileImage.gdkColorModel , + // but CairoGraphics2D doesn't handle alpha premultiplication properly (see + // the fixme in drawImage) so we use the naive Cairo model instead to trick + // the compositing context. + // Because getNativeCM() == getBufferCM() for this peer, it doesn't break. + return CairoSurface.cairoCM_pre; } } |