pjs/gfx/cairo/quartz-get-image.patch

diff --git a/gfx/cairo/README b/gfx/cairo/README
--- a/gfx/cairo/README
+++ b/gfx/cairo/README
@@ -69,16 +69,18 @@ quartz-state.patch: bug 522859; refactor
 quartz-cache-CGImageRef.patch: cache CGImageRef for a CGBitmapContext; when we reuse it, Quartz will cache stuff, improving performance
 
 quartz-remove-snapshot.patch: remove broken implementation of backend snapshot
 
 quartz-cglayers.patch: add support for cairo surfaces backed by CGLayers
 
 quartz-cglayers-fix-fallback.patch: Bug 572912; fix bug in fallback code in previous patch
 
+quartz-get-image.patch: Bug 575521; add a way to get the image surface associated with a surface
+
 premultiply-alpha-solid-gradients.patch: bug 539165; multiply the solid color by the alpha component before using it for a solid surface
 
 xlib-initialize-members.path: bug 548793; initialize XRender version if the server doesn't have the extension
 
 remove-comma: remove a comma from enum
 
 d2d.patch: add d2d support
 
diff --git a/gfx/cairo/cairo/src/cairo-quartz-surface.c b/gfx/cairo/cairo/src/cairo-quartz-surface.c
--- a/gfx/cairo/cairo/src/cairo-quartz-surface.c
+++ b/gfx/cairo/cairo/src/cairo-quartz-surface.c
@@ -1880,24 +1880,24 @@ _cairo_quartz_surface_finish (void *abst
     surface->cgContext = NULL;
 
     if (surface->bitmapContextImage) {
         CGImageRelease (surface->bitmapContextImage);
         surface->bitmapContextImage = NULL;
     }
 
     if (surface->imageSurfaceEquiv) {
+	_cairo_image_surface_assume_ownership_of_data (surface->imageSurfaceEquiv);
 	cairo_surface_destroy (surface->imageSurfaceEquiv);
 	surface->imageSurfaceEquiv = NULL;
+    } else if (surface->imageData) {
+        free (surface->imageData);
     }
 
-    if (surface->imageData) {
-	free (surface->imageData);
-	surface->imageData = NULL;
-    }
+    surface->imageData = NULL;
 
     if (surface->cgLayer) {
         CGLayerRelease (surface->cgLayer);
     }
 
     return CAIRO_STATUS_SUCCESS;
 }
 
@@ -3200,16 +3200,28 @@ cairo_quartz_finish_cg_context_with_clip
     cairo_quartz_surface_t *quartz = (cairo_quartz_surface_t*)surface;
 
     if (cairo_surface_get_type(surface) != CAIRO_SURFACE_TYPE_QUARTZ)
 	return;
 
     CGContextRestoreGState (quartz->cgContext);
 }
 
+cairo_surface_t *
+cairo_quartz_surface_get_image (cairo_surface_t *surface)
+{
+    cairo_quartz_surface_t *quartz = (cairo_quartz_surface_t *)surface;
+    cairo_image_surface_t *image;
+
+    if (_cairo_quartz_get_image(quartz, &image))
+        return NULL;
+
+    return (cairo_surface_t *)image;
+}
+
 /* Debug stuff */
 
 #ifdef QUARTZ_DEBUG
 
 #include <Movies.h>
 
 void ExportCGImageToPNGFile(CGImageRef inImageRef, char* dest)
 {
diff --git a/gfx/cairo/cairo/src/cairo-quartz.h b/gfx/cairo/cairo/src/cairo-quartz.h
--- a/gfx/cairo/cairo/src/cairo-quartz.h
+++ b/gfx/cairo/cairo/src/cairo-quartz.h
@@ -63,16 +63,19 @@ cairo_public CGContextRef
 cairo_quartz_surface_get_cg_context (cairo_surface_t *surface);
 
 cairo_public CGContextRef
 cairo_quartz_get_cg_context_with_clip (cairo_t *cr);
 
 cairo_public void
 cairo_quartz_finish_cg_context_with_clip (cairo_t *cr);
 
+cairo_public cairo_surface_t *
+cairo_quartz_surface_get_image (cairo_surface_t *surface);
+
 #if CAIRO_HAS_QUARTZ_FONT
 
 /*
  * Quartz font support
  */
 
 cairo_public cairo_font_face_t *
 cairo_quartz_font_face_create_for_cgfont (CGFontRef font);
diff --git a/gfx/cairo/cairo/src/cairo-rename.h b/gfx/cairo/cairo/src/cairo-rename.h
--- a/gfx/cairo/cairo/src/cairo-rename.h
+++ b/gfx/cairo/cairo/src/cairo-rename.h
@@ -178,16 +178,17 @@
 #define cairo_qpainter_surface_get_qpainter _moz_cairo_qpainter_surface_get_qpainter
 #define cairo_quartz_font_face_create_for_atsu_font_id _moz_cairo_quartz_font_face_create_for_atsu_font_id
 #define cairo_quartz_font_face_create_for_cgfont _moz_cairo_quartz_font_face_create_for_cgfont
 #define cairo_quartz_image_surface_create _moz_cairo_quartz_image_surface_create
 #define cairo_quartz_image_surface_get_image _moz_cairo_quartz_image_surface_get_image
 #define cairo_quartz_surface_create _moz_cairo_quartz_surface_create
 #define cairo_quartz_surface_create_for_cg_context _moz_cairo_quartz_surface_create_for_cg_context
 #define cairo_quartz_surface_get_cg_context _moz_cairo_quartz_surface_get_cg_context
+#define cairo_quartz_surface_get_image _moz_cairo_quartz_surface_get_image
 #define cairo_rectangle _moz_cairo_rectangle
 #define cairo_rectangle_list_destroy _moz_cairo_rectangle_list_destroy
 #define cairo_reference _moz_cairo_reference
 #define cairo_rel_curve_to _moz_cairo_rel_curve_to
 #define cairo_rel_line_to _moz_cairo_rel_line_to
 #define cairo_rel_move_to _moz_cairo_rel_move_to
 #define cairo_reset_clip _moz_cairo_reset_clip
 #define cairo_restore _moz_cairo_restore