The Tor Browser / file revision

 commit df2b22c8c6677d531194579c82a55e855adff706

 Author: Jeff Muizelaar <jmuizelaar@mozilla.com>

 Date:   Thu Apr 8 15:43:41 2010 -0400

     Propagate is_clear flag to quartz_image_surface

 diff --git a/src/cairo-quartz-image-surface.c b/src/cairo-quartz-image-surface.c

 index 5a624eb..b8809d5 100644

 --- a/src/cairo-quartz-image-surface.c

 +++ b/src/cairo-quartz-image-surface.c

 @@ -146,6 +146,8 @@ _cairo_quartz_image_surface_flush (void *asurface)

      surface->image = newImage;

      CGImageRelease (oldImage);

 +    surface->base.is_clear = surface->imageSurface->base.is_clear;

 +

      return CAIRO_STATUS_SUCCESS;

  }

 @@ -267,6 +269,8 @@ cairo_quartz_image_surface_create (cairo_surface_t *surface)

      qisurf->image = image;

      qisurf->imageSurface = image_surface;

 +    qisurf->base.is_clear = image_surface->base.is_clear;

 +

      return &qisurf->base;

  }