diff options
Diffstat (limited to 'exa/exa_render.c')
| -rw-r--r-- | exa/exa_render.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/exa/exa_render.c b/exa/exa_render.c index 5e7c67feb..2dd3fc1ce 100644 --- a/exa/exa_render.c +++ b/exa/exa_render.c @@ -749,6 +749,132 @@ done: } #endif +/** + * Same as miCreateAlphaPicture, except it uses ExaCheckPolyFillRect instead + * of PolyFillRect to initialize the pixmap after creating it, to prevent + * the pixmap from being migrated. + * + * See the comments about exaTrapezoids. + */ +static PicturePtr +exaCreateAlphaPicture (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); + 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; + ExaCheckPolyFillRect (&pPixmap->drawable, pGC, 1, &rect); + exaPixmapDirty (pPixmap, 0, 0, width, height); + FreeScratchGC (pGC); + pPicture = CreatePicture (0, &pPixmap->drawable, pPictFormat, + 0, 0, serverClient, &error); + (*pScreen->DestroyPixmap) (pPixmap); + return pPicture; +} + +/** + * exaTrapezoids is essentially a copy of miTrapezoids that uses + * exaCreateAlphaPicture instead of miCreateAlphaPicture. + * + * The problem with miCreateAlphaPicture is that it calls PolyFillRect + * to initialize the contents after creating the pixmap, which + * causes the pixmap to be moved in for acceleration. The subsequent + * call to RasterizeTrapezoid won't be accelerated however, which + * forces the pixmap to be moved out again. + * + * exaCreateAlphaPicture avoids this roundtrip by using ExaCheckPolyFillRect + * to initialize the contents. + */ +void +exaTrapezoids (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 = exaCreateAlphaPicture (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++) + exaTrapezoids (op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, traps); + } +} + #define NeedsComponent(f) (PICT_FORMAT_A(f) != 0 && PICT_FORMAT_RGB(f) != 0) /** |