138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/* $Xorg: Pixmap.c,v 1.3 2000/08/17 19:53:28 cpqbld Exp $ */
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/*
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Copyright 1993 by Davor Matic
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Permission to use, copy, modify, distribute, and sell this software
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and its documentation for any purpose is hereby granted without fee,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation. Davor Matic makes no representations about
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the suitability of this software for any purpose. It is provided "as
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is" without express or implied warranty.
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*/
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/* $XFree86: xc/programs/Xserver/hw/xnest/Pixmap.c,v 3.7 2003/07/16 01:38:51 dawes Exp $ */
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#include "X.h"
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#include "Xproto.h"
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#include "regionstr.h"
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#include "pixmapstr.h"
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#include "scrnintstr.h"
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#include "regionstr.h"
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#include "gc.h"
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#include "servermd.h"
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#include "mi.h"
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#include "Xnest.h"
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#include "Display.h"
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#include "Screen.h"
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#include "XNPixmap.h"
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#ifdef PIXPRIV
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int xnestPixmapPrivateIndex;
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#endif
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PixmapPtr
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xnestCreatePixmap(ScreenPtr pScreen, int width, int height, int depth)
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{
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PixmapPtr pPixmap;
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pPixmap = AllocatePixmap(pScreen, sizeof(xnestPrivPixmap));
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if (!pPixmap)
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return NullPixmap;
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pPixmap->drawable.type = DRAWABLE_PIXMAP;
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pPixmap->drawable.class = 0;
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pPixmap->drawable.depth = depth;
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pPixmap->drawable.bitsPerPixel = depth;
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pPixmap->drawable.id = 0;
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pPixmap->drawable.x = 0;
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pPixmap->drawable.y = 0;
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pPixmap->drawable.width = width;
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pPixmap->drawable.height = height;
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pPixmap->drawable.pScreen = pScreen;
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pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
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pPixmap->refcnt = 1;
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pPixmap->devKind = PixmapBytePad(width, depth);
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#ifdef PIXPRIV
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pPixmap->devPrivates[xnestPixmapPrivateIndex].ptr =
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(pointer)((char *)pPixmap + pScreen->totalPixmapSize);
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#else
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pPixmap->devPrivate.ptr = (pointer)(pPixmap + 1);
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#endif
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if (width && height)
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xnestPixmapPriv(pPixmap)->pixmap =
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XCreatePixmap(xnestDisplay,
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xnestDefaultWindows[pScreen->myNum],
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width, height, depth);
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else
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xnestPixmapPriv(pPixmap)->pixmap = 0;
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return pPixmap;
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}
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Bool
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xnestDestroyPixmap(PixmapPtr pPixmap)
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{
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if(--pPixmap->refcnt)
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return TRUE;
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XFreePixmap(xnestDisplay, xnestPixmap(pPixmap));
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xfree(pPixmap);
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return TRUE;
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}
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RegionPtr
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xnestPixmapToRegion(PixmapPtr pPixmap)
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{
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XImage *ximage;
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register RegionPtr pReg, pTmpReg;
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register int x, y;
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unsigned long previousPixel, currentPixel;
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BoxRec Box;
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Bool overlap;
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ximage = XGetImage(xnestDisplay, xnestPixmap(pPixmap), 0, 0,
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pPixmap->drawable.width, pPixmap->drawable.height,
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1, XYPixmap);
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pReg = REGION_CREATE(pPixmap->drawable.pScreen, NULL, 1);
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pTmpReg = REGION_CREATE(pPixmap->drawable.pScreen, NULL, 1);
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if(!pReg || !pTmpReg) return NullRegion;
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for (y = 0; y < pPixmap->drawable.height; y++) {
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Box.y1 = y;
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Box.y2 = y + 1;
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previousPixel = 0L;
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for (x = 0; x < pPixmap->drawable.width; x++) {
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currentPixel = XGetPixel(ximage, x, y);
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if (previousPixel != currentPixel) {
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if (previousPixel == 0L) {
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/* left edge */
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Box.x1 = x;
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}
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else if (currentPixel == 0L) {
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/* right edge */
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Box.x2 = x;
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REGION_RESET(pPixmap->drawable.pScreen, pTmpReg, &Box);
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REGION_APPEND(pPixmap->drawable.pScreen, pReg, pTmpReg);
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}
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previousPixel = currentPixel;
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}
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}
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if (previousPixel != 0L) {
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/* right edge because of the end of pixmap */
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Box.x2 = pPixmap->drawable.width;
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REGION_RESET(pPixmap->drawable.pScreen, pTmpReg, &Box);
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REGION_APPEND(pPixmap->drawable.pScreen, pReg, pTmpReg);
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}
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}
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REGION_DESTROY(pPixmap->drawable.pScreen, pTmpReg);
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XDestroyImage(ximage);
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REGION_VALIDATE(pPixmap->drawable.pScreen, pReg, &overlap);
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return(pReg);
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}
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