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diff -ru a/fb/fbpict.c b/fb/fbpict.c
--- a/fb/fbpict.c 2011-08-01 01:44:24.000000000 +0200
+++ b/fb/fbpict.c 2011-10-05 22:45:29.000000000 +0200
@@ -364,7 +364,7 @@
ps->Glyphs = miGlyphs;
ps->CompositeRects = miCompositeRects;
ps->RasterizeTrapezoid = fbRasterizeTrapezoid;
- ps->Trapezoids = fbTrapezoids;
+ ps->Trapezoids = miTrapezoids;
ps->AddTraps = fbAddTraps;
ps->AddTriangles = fbAddTriangles;
ps->Triangles = fbTriangles;
diff -ru a/render/mipict.c b/render/mipict.c
--- a/render/mipict.c 2011-04-04 05:19:50.000000000 +0200
+++ b/render/mipict.c 2011-10-05 22:02:53.000000000 +0200
@@ -573,6 +573,67 @@
}
}
+void
+miTrapezoids (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ PictFormatPtr maskFormat,
+ INT16 xSrc,
+ INT16 ySrc,
+ int ntrap,
+ xTrapezoid *traps)
+{
+ ScreenPtr pScreen = pDst->pDrawable->pScreen;
+ PictureScreenPtr ps = GetPictureScreen(pScreen);
+
+ /*
+ * Check for solid alpha add
+ */
+ if (op == PictOpAdd && miIsSolidAlpha (pSrc))
+ {
+ for (; ntrap; ntrap--, traps++)
+ (*ps->RasterizeTrapezoid) (pDst, traps, 0, 0);
+ }
+ else if (maskFormat)
+ {
+ PicturePtr pPicture;
+ BoxRec bounds;
+ INT16 xDst, yDst;
+ INT16 xRel, yRel;
+
+ xDst = traps[0].left.p1.x >> 16;
+ yDst = traps[0].left.p1.y >> 16;
+
+ miTrapezoidBounds (ntrap, traps, &bounds);
+ if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
+ return;
+ pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ if (!pPicture)
+ return;
+ for (; ntrap; ntrap--, traps++)
+ (*ps->RasterizeTrapezoid) (pPicture, traps,
+ -bounds.x1, -bounds.y1);
+ xRel = bounds.x1 + xSrc - xDst;
+ yRel = bounds.y1 + ySrc - yDst;
+ CompositePicture (op, pSrc, pPicture, pDst,
+ xRel, yRel, 0, 0, bounds.x1, bounds.y1,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ FreePicture (pPicture, 0);
+ }
+ else
+ {
+ if (pDst->polyEdge == PolyEdgeSharp)
+ maskFormat = PictureMatchFormat (pScreen, 1, PICT_a1);
+ else
+ maskFormat = PictureMatchFormat (pScreen, 8, PICT_a8);
+ for (; ntrap; ntrap--, traps++)
+ miTrapezoids (op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, traps);
+ }
+}
+
Bool
miPictureInit (ScreenPtr pScreen, PictFormatPtr formats, int nformats)
{
@@ -599,7 +660,7 @@
ps->Composite = 0; /* requires DDX support */
ps->Glyphs = miGlyphs;
ps->CompositeRects = miCompositeRects;
- ps->Trapezoids = 0;
+ ps->Trapezoids = miTrapezoids;
ps->Triangles = 0;
ps->RasterizeTrapezoid = 0; /* requires DDX support */
diff -ru a/render/mipict.h b/render/mipict.h
--- a/render/mipict.h 2011-04-04 05:19:50.000000000 +0200
+++ b/render/mipict.h 2011-10-05 22:06:19.000000000 +0200
@@ -129,6 +129,23 @@
CARD32 pixel,
xRenderColor *color);
+extern _X_EXPORT PicturePtr
+miCreateAlphaPicture (ScreenPtr pScreen,
+ PicturePtr pDst,
+ PictFormatPtr pPictFormat,
+ CARD16 width,
+ CARD16 height);
+
+extern _X_EXPORT void
+miTrapezoids (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ PictFormatPtr maskFormat,
+ INT16 xSrc,
+ INT16 ySrc,
+ int ntrap,
+ xTrapezoid *traps);
+
extern _X_EXPORT Bool
miIsSolidAlpha (PicturePtr pSrc);
diff -ru a/render/mitrap.c b/render/mitrap.c
--- a/render/mitrap.c 2011-04-04 05:19:50.000000000 +0200
+++ b/render/mitrap.c 2011-10-05 22:05:29.000000000 +0200
@@ -34,6 +34,55 @@
#include "picturestr.h"
#include "mipict.h"
+PicturePtr
+miCreateAlphaPicture (ScreenPtr pScreen,
+ PicturePtr pDst,
+ PictFormatPtr pPictFormat,
+ CARD16 width,
+ CARD16 height)
+{
+ PixmapPtr pPixmap;
+ PicturePtr pPicture;
+ GCPtr pGC;
+ int error;
+ xRectangle rect;
+
+ if (width > 32767 || height > 32767)
+ return 0;
+
+ if (!pPictFormat)
+ {
+ if (pDst->polyEdge == PolyEdgeSharp)
+ pPictFormat = PictureMatchFormat (pScreen, 1, PICT_a1);
+ else
+ pPictFormat = PictureMatchFormat (pScreen, 8, PICT_a8);
+ if (!pPictFormat)
+ return 0;
+ }
+
+ pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
+ pPictFormat->depth, 0);
+ if (!pPixmap)
+ return 0;
+ pGC = GetScratchGC (pPixmap->drawable.depth, pScreen);
+ if (!pGC)
+ {
+ (*pScreen->DestroyPixmap) (pPixmap);
+ return 0;
+ }
+ ValidateGC (&pPixmap->drawable, pGC);
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = width;
+ rect.height = height;
+ (*pGC->ops->PolyFillRect)(&pPixmap->drawable, pGC, 1, &rect);
+ FreeScratchGC (pGC);
+ pPicture = CreatePicture (0, &pPixmap->drawable, pPictFormat,
+ 0, 0, serverClient, &error);
+ (*pScreen->DestroyPixmap) (pPixmap);
+ return pPicture;
+}
+
static xFixed
miLineFixedX (xLineFixed *l, xFixed y, Bool ceil)
{
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