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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2013-01-31 14:19:53 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2013-01-31 14:19:53 +0000 |
| commit | 22b7fae0368ba6cff23b2ebdf58bd7d1bfdfbd6f (patch) | |
| tree | ae395289398d1d3fa80380e4b18baabf92627539 /src/cairo-image-surface.c | |
| parent | ec58fde294afd52c89fa5ed21ba2611edfdbd550 (diff) | |
| download | cairo-22b7fae0368ba6cff23b2ebdf58bd7d1bfdfbd6f.tar.gz | |
image: Add a reference for the clone's parent image
We use the parent as a flag during map-to-image/umap-image that the
resultant image came from a fallback rather than as direct call
to the backend's map_to_image(). Whilst we use it as a simple flag,
we need to make sure the parent surface obeys the reference counting
semantics and is consistent for all callers.
Unlike other users of the parent pointer, there is no resource sharing
between the two surfaces.
Reported-by: Henry Song <henry.song@samsung.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src/cairo-image-surface.c')
| -rw-r--r-- | src/cairo-image-surface.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/cairo-image-surface.c b/src/cairo-image-surface.c index 3fe6e433a..20a1c03e3 100644 --- a/src/cairo-image-surface.c +++ b/src/cairo-image-surface.c @@ -1240,7 +1240,14 @@ _cairo_image_surface_clone_subimage (cairo_surface_t *surface, if (unlikely (status)) goto error; - _cairo_image_surface_set_parent (to_image_surface (image), surface); + /* We use the parent as a flag during map-to-image/umap-image that the + * resultant image came from a fallback rather than as direct call + * to the backend's map_to_image(). Whilst we use it as a simple flag, + * we need to make sure the parent surface obeys the reference counting + * semantics and is consistent for all callers. + */ + _cairo_image_surface_set_parent (to_image_surface (image), + cairo_surface_reference (surface)); return to_image_surface (image); |