f2e310132f
These hints allow an acceleration architecture to optimize allocation of certain types of pixmaps, such as pixmaps that will serve as backing pixmaps for redirected windows.
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
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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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#ifdef HAVE_XNEST_CONFIG_H
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#include <xnest-config.h>
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#endif
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#include <X11/X.h>
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#include <X11/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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int xnestPixmapPrivateIndex;
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PixmapPtr
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xnestCreatePixmap(ScreenPtr pScreen, int width, int height, int depth,
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unsigned usage_hint)
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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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pPixmap->devPrivates[xnestPixmapPrivateIndex].ptr =
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(pointer)((char *)pPixmap + pScreen->totalPixmapSize);
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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) {
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XDestroyImage(ximage);
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return NullRegion;
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}
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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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