fb: Adjust transform or composite coordinates for pixman operations

Windows (or even pixmaps, in some cases) may not sit at the origin of
the containing pixmap, so any coordinates relative to the drawable
must be adjusted. For destinations and untransformed sources, the
operation coordinates are adjusted. For transformed sources, the
transform matrix is adjusted.

Signed-off-by: Keith Packard <keithp@keithp.com>
Acked-by: Soeren Sandmann <sandmann@daimi.au.dk>

1 files changed, 5 insertions, 2 deletions

diff --git a/fb/fb.h b/fb/fb.h
index ed21f9eb6..02d6c0372 100644
--- a/fb/fb.h
+++ b/fb/fb.h
@@ -2082,8 +2082,11 @@ fbFillRegionSolid (DrawablePtr	pDrawable,
 		   FbBits	xor);
 
 extern _X_EXPORT pixman_image_t *
-image_from_pict (PicturePtr pict,
-		 Bool       has_clip);
+image_from_pict (PicturePtr	pict,
+		 Bool		has_clip,
+		 int		*xoff,
+		 int		*yoff);
+
 extern _X_EXPORT void free_pixman_pict (PicturePtr, pixman_image_t *);
 
 #endif /* _FB_H_ */