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IABSD.fr/xenocara/xserver/mi/micopy.c
matthieu
- xserver/mi/micopy.c
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/* * Copyright © 1998 Keith Packard * * 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 "mi.h" #include "scrnintstr.h" #include "gcstruct.h" #include "pixmap.h" #include "pixmapstr.h" #include "windowstr.h" void miCopyRegion(DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable, GCPtr pGC, RegionPtr pDstRegion, int dx, int dy, miCopyProc copyProc, Pixel bitPlane, void *closure) { int careful; Bool reverse; Bool upsidedown; BoxPtr pbox; int nbox; BoxPtr pboxNew1, pboxNew2, pboxBase, pboxNext, pboxTmp; pbox = RegionRects(pDstRegion); nbox = RegionNumRects(pDstRegion); /* XXX we have to err on the side of safety when both are windows, * because we don't know if IncludeInferiors is being used. */ careful = ((pSrcDrawable == pDstDrawable) || ((pSrcDrawable->type == DRAWABLE_WINDOW) && (pDstDrawable->type == DRAWABLE_WINDOW))); pboxNew1 = NULL; pboxNew2 = NULL; if (careful && dy < 0) { upsidedown = TRUE; if (nbox > 1) { /* keep ordering in each band, reverse order of bands */ pboxNew1 = xallocarray(nbox, sizeof(BoxRec)); if (!pboxNew1) return; pboxBase = pboxNext = pbox + nbox - 1; while (pboxBase >= pbox) { while ((pboxNext >= pbox) && (pboxBase->y1 == pboxNext->y1)) pboxNext--; pboxTmp = pboxNext + 1; while (pboxTmp <= pboxBase) { *pboxNew1++ = *pboxTmp++; } pboxBase = pboxNext; } pboxNew1 -= nbox; pbox = pboxNew1; } } else { /* walk source top to bottom */ upsidedown = FALSE; } if (careful && dx < 0) { /* walk source right to left */ if (dy <= 0) reverse = TRUE; else reverse = FALSE; if (nbox > 1) { /* reverse order of rects in each band */ pboxNew2 = xallocarray(nbox, sizeof(BoxRec)); if (!pboxNew2) { free(pboxNew1); return; } pboxBase = pboxNext = pbox; while (pboxBase < pbox + nbox) { while ((pboxNext < pbox + nbox) && (pboxNext->y1 == pboxBase->y1)) pboxNext++; pboxTmp = pboxNext; while (pboxTmp != pboxBase) { *pboxNew2++ = *--pboxTmp; } pboxBase = pboxNext; } pboxNew2 -= nbox; pbox = pboxNew2; } } else { /* walk source left to right */ reverse = FALSE; } (*copyProc) (pSrcDrawable, pDstDrawable, pGC, pbox, nbox, dx, dy, reverse, upsidedown, bitPlane, closure); free(pboxNew1); free(pboxNew2); } RegionPtr miDoCopy(DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable, GCPtr pGC, int xIn, int yIn, int widthSrc, int heightSrc, int xOut, int yOut, miCopyProc copyProc, Pixel bitPlane, void *closure) { RegionPtr prgnSrcClip = NULL; /* may be a new region, or just a copy */ Bool freeSrcClip = FALSE; RegionPtr prgnExposed = NULL; RegionRec rgnDst; int dx; int dy; int numRects; int box_x1; int box_y1; int box_x2; int box_y2; Bool fastSrc = FALSE; /* for fast clipping with pixmap source */ Bool fastDst = FALSE; /* for fast clipping with one rect dest */ Bool fastExpose = FALSE; /* for fast exposures with pixmap source */ /* Short cut for unmapped windows */ if (pDstDrawable->type == DRAWABLE_WINDOW && !((WindowPtr) pDstDrawable)->realized) { return NULL; } (*pSrcDrawable->pScreen->SourceValidate) (pSrcDrawable, xIn, yIn, widthSrc, heightSrc, pGC->subWindowMode); /* Compute source clip region */ if (pSrcDrawable->type == DRAWABLE_PIXMAP) { if ((pSrcDrawable == pDstDrawable) && (!pGC->clientClip)) prgnSrcClip = miGetCompositeClip(pGC); else fastSrc = TRUE; } else { if (pGC->subWindowMode == IncludeInferiors) { /* * XFree86 DDX empties the border clip when the * VT is inactive, make sure the region isn't empty */ if (!((WindowPtr) pSrcDrawable)->parent && RegionNotEmpty(&((WindowPtr) pSrcDrawable)->borderClip)) { /* * special case bitblt from root window in * IncludeInferiors mode; just like from a pixmap */ fastSrc = TRUE; } else if ((pSrcDrawable == pDstDrawable) && (!pGC->clientClip)) { prgnSrcClip = miGetCompositeClip(pGC); } else { prgnSrcClip = NotClippedByChildren((WindowPtr) pSrcDrawable); freeSrcClip = TRUE; } } else { prgnSrcClip = &((WindowPtr) pSrcDrawable)->clipList; } } xIn += pSrcDrawable->x; yIn += pSrcDrawable->y; xOut += pDstDrawable->x; yOut += pDstDrawable->y; box_x1 = xIn; box_y1 = yIn; box_x2 = xIn + widthSrc; box_y2 = yIn + heightSrc; dx = xIn - xOut; dy = yIn - yOut; /* Don't create a source region if we are doing a fast clip */ if (fastSrc) { RegionPtr cclip; fastExpose = TRUE; /* * clip the source; if regions extend beyond the source size, * make sure exposure events get sent */ if (box_x1 < pSrcDrawable->x) { box_x1 = pSrcDrawable->x; fastExpose = FALSE; } if (box_y1 < pSrcDrawable->y) { box_y1 = pSrcDrawable->y; fastExpose = FALSE; } if (box_x2 > pSrcDrawable->x + (int) pSrcDrawable->width) { box_x2 = pSrcDrawable->x + (int) pSrcDrawable->width; fastExpose = FALSE; } if (box_y2 > pSrcDrawable->y + (int) pSrcDrawable->height) { box_y2 = pSrcDrawable->y + (int) pSrcDrawable->height; fastExpose = FALSE; } /* Translate and clip the dst to the destination composite clip */ box_x1 -= dx; box_x2 -= dx; box_y1 -= dy; box_y2 -= dy; /* If the destination composite clip is one rectangle we can do the clip directly. Otherwise we have to create a full blown region and call intersect */ cclip = miGetCompositeClip(pGC); if (RegionNumRects(cclip) == 1) { BoxPtr pBox = RegionRects(cclip); if (box_x1 < pBox->x1) box_x1 = pBox->x1; if (box_x2 > pBox->x2) box_x2 = pBox->x2; if (box_y1 < pBox->y1) box_y1 = pBox->y1; if (box_y2 > pBox->y2) box_y2 = pBox->y2; fastDst = TRUE; } } /* Check to see if the region is empty */ if (box_x1 >= box_x2 || box_y1 >= box_y2) { RegionNull(&rgnDst); } else { BoxRec box; box.x1 = box_x1; box.y1 = box_y1; box.x2 = box_x2; box.y2 = box_y2; RegionInit(&rgnDst, &box, 1); } /* Clip against complex source if needed */ if (!fastSrc) { RegionIntersect(&rgnDst, &rgnDst, prgnSrcClip); RegionTranslate(&rgnDst, -dx, -dy); } /* Clip against complex dest if needed */ if (!fastDst) { RegionIntersect(&rgnDst, &rgnDst, miGetCompositeClip(pGC)); } /* Do bit blitting */ numRects = RegionNumRects(&rgnDst); if (numRects && widthSrc && heightSrc) miCopyRegion(pSrcDrawable, pDstDrawable, pGC, &rgnDst, dx, dy, copyProc, bitPlane, closure); /* Pixmap sources generate a NoExposed (we return NULL to do this) */ if (!fastExpose && pGC->fExpose) prgnExposed = miHandleExposures(pSrcDrawable, pDstDrawable, pGC, xIn - pSrcDrawable->x, yIn - pSrcDrawable->y, widthSrc, heightSrc, xOut - pDstDrawable->x, yOut - pDstDrawable->y); RegionUninit(&rgnDst); if (freeSrcClip) RegionDestroy(prgnSrcClip); return prgnExposed; }