/* * $XFree86: xc/programs/Xserver/render/mitrap.c,v 1.9 2002/11/05 23:39:16 keithp Exp $ * * Copyright � 2002 Keith Packard, member of The XFree86 Project, Inc. * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of Keith Packard not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. Keith Packard makes no * representations about the suitability of this software for any purpose. It * is provided "as is" without express or implied warranty. * * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ #include "scrnintstr.h" #include "gcstruct.h" #include "pixmapstr.h" #include "windowstr.h" #include "servermd.h" #include "mi.h" #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); 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) { xFixed dx = l->p2.x - l->p1.x; xFixed_32_32 ex = (xFixed_32_32) (y - l->p1.y) * dx; xFixed dy = l->p2.y - l->p1.y; if (ceil) ex += (dy - 1); return l->p1.x + (xFixed) (ex / dy); } void miTrapezoidBounds (int ntrap, xTrapezoid *traps, BoxPtr box) { box->y1 = MAXSHORT; box->y2 = MINSHORT; box->x1 = MAXSHORT; box->x2 = MINSHORT; for (; ntrap; ntrap--, traps++) { INT16 x1, y1, x2, y2; if (!xTrapezoidValid(traps)) continue; y1 = xFixedToInt (traps->top); if (y1 < box->y1) box->y1 = y1; y2 = xFixedToInt (xFixedCeil (traps->bottom)); if (y2 > box->y2) box->y2 = y2; x1 = xFixedToInt (min (miLineFixedX (&traps->left, traps->top, FALSE), miLineFixedX (&traps->left, traps->bottom, FALSE))); if (x1 < box->x1) box->x1 = x1; x2 = xFixedToInt (xFixedCeil (max (miLineFixedX (&traps->right, traps->top, TRUE), miLineFixedX (&traps->right, traps->bottom, TRUE)))); if (x2 > box->x2) box->x2 = x2; } } 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); PicturePtr pPicture = 0; BoxRec bounds; INT16 xDst, yDst; INT16 xRel, yRel; xDst = traps[0].left.p1.x >> 16; yDst = traps[0].left.p1.y >> 16; if (maskFormat) { 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++) { if (!xTrapezoidValid(traps)) continue; if (!maskFormat) { miTrapezoidBounds (1, traps, &bounds); if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2) continue; pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat, bounds.x2 - bounds.x1, bounds.y2 - bounds.y1); if (!pPicture) continue; } (*ps->RasterizeTrapezoid) (pPicture, traps, -bounds.x1, -bounds.y1); if (!maskFormat) { 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); } } if (maskFormat) { 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); } }