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37 lines
1.1 KiB
Diff
37 lines
1.1 KiB
Diff
diff -r 37dcf8c8ef5e gfx/cairo/libpixman/src/fbcompose.c
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--- a/gfx/cairo/libpixman/src/fbcompose.c Fri Jun 08 17:16:14 2007 -0700
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+++ b/gfx/cairo/libpixman/src/fbcompose.c Fri Jun 08 17:18:31 2007 -0700
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@@ -28,6 +28,7 @@
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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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@@ -4093,6 +4094,24 @@ fbCompositeRect (const FbComposeData *da
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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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