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[quartz] Take snapshot instead of using CGImageCreateCopy

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CGImageCreateCopy doesn't copy the data provider, so it's possible to
free the data underneath an image without snapshotting it first.
This commit is contained in:
Vladimir Vukicevic 2008-07-09 13:20:53 -07:00 • committed by Vladimir Vukicevic
parent e534b0bed1
commit d61c7df1c0
1 changed files with 22 additions and 10 deletions
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32
src/cairo-quartz-surface.c
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@ -695,6 +695,13 @@ CreateRepeatingGradientFunction (cairo_quartz_surface_t *surface,
/* Obtain a CGImageRef from a #cairo_surface_t * */
static void
DataProviderReleaseCallback (void *info, const void *data, size_t size)
{
cairo_surface_t *surface = (cairo_surface_t *) info;
cairo_surface_destroy (surface);
}
static cairo_status_t
_cairo_surface_to_cgimage (cairo_surface_t *target,
cairo_surface_t *source,
@ -737,17 +744,22 @@ _cairo_surface_to_cgimage (cairo_surface_t *target,
if (isurf->width == 0 || isurf->height == 0) {
*image_out = NULL;
} else {
image = _cairo_quartz_create_cgimage (isurf->format,
isurf->width,
isurf->height,
isurf->stride,
isurf->data,
TRUE,
NULL, NULL, NULL);
cairo_image_surface_t *isurf_snap = NULL;
isurf_snap = _cairo_surface_snapshot (isurf);
if (isurf_snap == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* Create a copy to ensure that the CGImageRef doesn't depend on the image surface's backing store */
*image_out = CGImageCreateCopy (image);
CGImageRelease (image);
image = _cairo_quartz_create_cgimage (isurf_snap->format,
isurf_snap->width,
isurf_snap->height,
isurf_snap->stride,
isurf_snap->data,
TRUE,
NULL,
DataProviderReleaseCallback,
isurf_snap);
*image_out = image;
}
if ((cairo_surface_t*) isurf != source)