diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-03-08 02:09:25 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2012-03-08 09:04:37 +0000 |
| commit | 8e6166a0e87a00248d0d4925953c923850f5b840 (patch) | |
| tree | 9a938a1f0e2e0251d45d955d093faea721f92f0b /src/sna/sna_composite.c | |
| parent | 3f73cc706ff39cd4c10433791f12b5f829f62e6d (diff) | |
sna: Becareful not to reduce operators for superluminal colors
wine-1.4 is such an example of a crazy application.
References: https://bugs.freedesktop.org/show_bug.cgi?id=42606
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src/sna/sna_composite.c')
| -rw-r--r-- | src/sna/sna_composite.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/sna/sna_composite.c b/src/sna/sna_composite.c index 225008fb..38ff99de 100644 --- a/src/sna/sna_composite.c +++ b/src/sna/sna_composite.c @@ -644,7 +644,7 @@ sna_composite_rectangles(CARD8 op, return; } - if (color->alpha <= 0x00ff) { + if ((color->red|color->green|color->blue|color->alpha) <= 0x00ff) { switch (op) { case PictOpOver: case PictOpOutReverse: @@ -661,6 +661,22 @@ sna_composite_rectangles(CARD8 op, op = PictOpOverReverse; break; } + } + if (color->alpha <= 0x00ff) { + switch (op) { + case PictOpOver: + case PictOpOutReverse: + return; + case PictOpInReverse: + op = PictOpClear; + break; + case PictOpAtopReverse: + op = PictOpOut; + break; + case PictOpXor: + op = PictOpOverReverse; + break; + } } else if (color->alpha >= 0xff00) { switch (op) { case PictOpOver: |