/* $Xorg: pixmap.c,v 1.4 2001/02/09 02:04:40 xorgcvs Exp $ */ /* Copyright 1993, 1998 The Open Group 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. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. */ /* $XFree86: xc/programs/Xserver/dix/pixmap.c,v 3.4 2001/01/17 22:36:44 dawes Exp $ */ #ifdef HAVE_DIX_CONFIG_H #include <dix-config.h> #endif #include <nx-X11/X.h> #include "scrnintstr.h" #include "misc.h" #include "os.h" #include "windowstr.h" #include "resource.h" #include "dixstruct.h" #include "gcstruct.h" #include "servermd.h" #include "site.h" /* * Scratch pixmap management and device independent pixmap allocation * function. */ /* callable by ddx */ PixmapPtr GetScratchPixmapHeader(ScreenPtr pScreen, int width, int height, int depth, int bitsPerPixel, int devKind, void * pPixData) { PixmapPtr pPixmap = pScreen->pScratchPixmap; if (pPixmap) pScreen->pScratchPixmap = NULL; else /* width and height of 0 means don't allocate any pixmap data */ pPixmap = (*pScreen->CreatePixmap)(pScreen, 0, 0, depth); if (pPixmap) { if ((*pScreen->ModifyPixmapHeader)(pPixmap, width, height, depth, bitsPerPixel, devKind, pPixData)) return pPixmap; (*pScreen->DestroyPixmap)(pPixmap); } return NullPixmap; } /* callable by ddx */ void FreeScratchPixmapHeader(PixmapPtr pPixmap) { if (pPixmap) { ScreenPtr pScreen = pPixmap->drawable.pScreen; pPixmap->devPrivate.ptr = NULL; /* lest ddx chases bad ptr */ if (pScreen->pScratchPixmap) (*pScreen->DestroyPixmap)(pPixmap); else pScreen->pScratchPixmap = pPixmap; } } Bool CreateScratchPixmapsForScreen(int scrnum) { /* let it be created on first use */ screenInfo.screens[scrnum]->pScratchPixmap = NULL; return TRUE; } void FreeScratchPixmapsForScreen(int scrnum) { FreeScratchPixmapHeader(screenInfo.screens[scrnum]->pScratchPixmap); } /* callable by ddx */ PixmapPtr AllocatePixmap(ScreenPtr pScreen, int pixDataSize) { PixmapPtr pPixmap; #ifdef PIXPRIV char *ptr; DevUnion *ppriv; unsigned *sizes; unsigned size; int i; if (pScreen->totalPixmapSize > ((size_t)-1) - pixDataSize) return NullPixmap; /* * FIXME: Allocate 4 bytes at the end of each pixmap. This * is a quick workaround intended to fix a problem reported * by Valgrind due to fbBlt() writing just after the end of * the pixmap buffer. This may be a RENDER bug. */ pPixmap = (PixmapPtr)xalloc(pScreen->totalPixmapSize + pixDataSize + 4); if (!pPixmap) return NullPixmap; ppriv = (DevUnion *)(pPixmap + 1); pPixmap->devPrivates = ppriv; sizes = pScreen->PixmapPrivateSizes; ptr = (char *)(ppriv + pScreen->PixmapPrivateLen); for (i = pScreen->PixmapPrivateLen; --i >= 0; ppriv++, sizes++) { if ((size = *sizes) != 0) { ppriv->ptr = (void *)ptr; ptr += size; } else ppriv->ptr = (void *)NULL; } #else pPixmap = (PixmapPtr)xalloc(sizeof(PixmapRec) + pixDataSize); #endif return pPixmap; }