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image: The a8 in-place span compositing is only valid for SOURCE

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Fixes test/a8-clear.

Reported-by: Jeremy Moles <jeremy@emperorlinux.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-09-29 13:46:02 +01:00
parent 05faebd584
commit 66ace8cd33
1 changed files with 7 additions and 2 deletions
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9
src/cairo-image-surface.c
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@ -3447,10 +3447,15 @@ _composite_spans (void *closure,
/* TODO: support rendering to A1 surfaces (or: go add span
* compositing to pixman.) */
if (pattern == NULL && dst_format == PIXMAN_a8) {
if (pattern == NULL &&
dst_format == PIXMAN_a8 &&
op == CAIRO_OPERATOR_SOURCE)
{
mask = dst;
dst = NULL;
} else {
}
else
{
int stride = CAIRO_STRIDE_FOR_WIDTH_BPP (extents->width, 8);
uint8_t *data = mask_buf;