diff options
Diffstat (limited to 'nx-X11/programs/Xserver/dix/pixmap.c')
| -rw-r--r-- | nx-X11/programs/Xserver/dix/pixmap.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/dix/pixmap.c b/nx-X11/programs/Xserver/dix/pixmap.c new file mode 100644 index 000000000..4be7d03ce --- /dev/null +++ b/nx-X11/programs/Xserver/dix/pixmap.c @@ -0,0 +1,152 @@ +/* $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 <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, pointer 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 = (pointer)ptr; + ptr += size; + } + else + ppriv->ptr = (pointer)NULL; + } +#else + pPixmap = (PixmapPtr)xalloc(sizeof(PixmapRec) + pixDataSize); +#endif + return pPixmap; +} |