/* * * 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. */ #ifdef HAVE_DIX_CONFIG_H #include <dix-config.h> #endif #include "scrnintstr.h" #include "gcstruct.h" #include "pixmapstr.h" #include "windowstr.h" #include "mi.h" #include "picturestr.h" #include "mipict.h" void miPointFixedBounds (int npoint, xPointFixed *points, BoxPtr bounds) { bounds->x1 = xFixedToInt (points->x); bounds->x2 = xFixedToInt (xFixedCeil (points->x)); bounds->y1 = xFixedToInt (points->y); bounds->y2 = xFixedToInt (xFixedCeil (points->y)); points++; npoint--; while (npoint-- > 0) { INT16 x1 = xFixedToInt (points->x); INT16 x2 = xFixedToInt (xFixedCeil (points->x)); INT16 y1 = xFixedToInt (points->y); INT16 y2 = xFixedToInt (xFixedCeil (points->y)); if (x1 < bounds->x1) bounds->x1 = x1; else if (x2 > bounds->x2) bounds->x2 = x2; if (y1 < bounds->y1) bounds->y1 = y1; else if (y2 > bounds->y2) bounds->y2 = y2; points++; } } void miTriangleBounds (int ntri, xTriangle *tris, BoxPtr bounds) { miPointFixedBounds (ntri * 3, (xPointFixed *) tris, bounds); } void miTriangles (CARD8 op, PicturePtr pSrc, PicturePtr pDst, PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc, int ntri, xTriangle *tris) { ScreenPtr pScreen = pDst->pDrawable->pScreen; PictureScreenPtr ps = GetPictureScreen(pScreen); /* * Check for solid alpha add */ if (op == PictOpAdd && miIsSolidAlpha (pSrc)) { (*ps->AddTriangles) (pDst, 0, 0, ntri, tris); } else if (maskFormat) { BoxRec bounds; PicturePtr pPicture; INT16 xDst, yDst; INT16 xRel, yRel; xDst = tris[0].p1.x >> 16; yDst = tris[0].p1.y >> 16; miTriangleBounds (ntri, tris, &bounds); if (bounds.x2 <= bounds.x1 || bounds.y2 <= bounds.y1) return; pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat, bounds.x2 - bounds.x1, bounds.y2 - bounds.y1); if (!pPicture) return; (*ps->AddTriangles) (pPicture, -bounds.x1, -bounds.y1, ntri, tris); 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 (; ntri; ntri--, tris++) miTriangles (op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, tris); } } void miTriStrip (CARD8 op, PicturePtr pSrc, PicturePtr pDst, PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc, int npoint, xPointFixed *points) { ScreenPtr pScreen = pDst->pDrawable->pScreen; PictureScreenPtr ps = GetPictureScreen(pScreen); xTriangle *tris, *tri; int ntri; if (npoint < 3) return; ntri = npoint - 2; tris = xalloc (ntri * sizeof (xTriangle)); if (!tris) return; for (tri = tris; npoint >= 3; npoint--, points++, tri++) { tri->p1 = points[0]; tri->p2 = points[1]; tri->p3 = points[2]; } (*ps->Triangles) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntri, tris); xfree (tris); } void miTriFan (CARD8 op, PicturePtr pSrc, PicturePtr pDst, PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc, int npoint, xPointFixed *points) { ScreenPtr pScreen = pDst->pDrawable->pScreen; PictureScreenPtr ps = GetPictureScreen(pScreen); xTriangle *tris, *tri; xPointFixed *first; int ntri; if (npoint < 3) return; ntri = npoint - 2; tris = xalloc (ntri * sizeof (xTriangle)); if (!tris) return; first = points++; for (tri = tris; npoint >= 3; npoint--, points++, tri++) { tri->p1 = *first; tri->p2 = points[0]; tri->p3 = points[1]; } (*ps->Triangles) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntri, tris); xfree (tris); }