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61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
Index: fbcompose.c
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===================================================================
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RCS file: /cvsroot/mozilla/gfx/cairo/libpixman/src/fbcompose.c,v
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retrieving revision 1.6
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diff -u -8 -p -r1.6 fbcompose.c
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--- pixman/src/fbcompose.c 11 Jan 2006 00:48:57 -0000 1.6
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+++ pixman/src/fbcompose.c 8 Feb 2006 00:27:16 -0000
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@@ -23,16 +23,17 @@
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "pixman-xserver-compat.h"
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#include "fbpict.h"
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+#include "fbmmx.h"
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#ifdef RENDER
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#include "pixregionint.h"
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#ifdef _MSC_VER
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#define _USE_MATH_DEFINES
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#endif
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@@ -3756,16 +3757,34 @@ fbCompositeRect (const FbComposeData *da
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data->mask->componentAlpha &&
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PICT_FORMAT_RGB (data->mask->format_code))
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{
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CARD32 *mask_buffer = dest_buffer + data->width;
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CombineFuncC compose = composeFunctions.combineC[data->op];
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if (!compose)
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return;
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+ /* XXX: The non-MMX version of some of the fbCompose functions
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+ * overwrite the source or mask data (ones that use
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+ * fbCombineMaskC, fbCombineMaskAlphaC, or fbCombineMaskValueC
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+ * as helpers). This causes problems with the optimization in
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+ * this function that only fetches the source or mask once if
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+ * possible. If we're on a non-MMX machine, disable this
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+ * optimization as a bandaid fix.
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+ *
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+ * https://bugs.freedesktop.org/show_bug.cgi?id=5777
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+ */
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+#ifdef USE_MMX
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+ if (!fbHaveMMX())
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+#endif
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+ {
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+ srcClass = SourcePictClassUnknown;
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+ maskClass = SourcePictClassUnknown;
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+ }
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+
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for (i = 0; i < data->height; ++i) {
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/* fill first half of scanline with source */
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if (fetchSrc)
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{
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if (fetchMask)
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{
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/* fetch mask before source so that fetching of
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source can be optimized */
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