IABSD.fr/xenocara/xserver/dix/pixmap.c

Branch : - branch - master - tag -

• Show log

  Commit

• Author : matthieu
  Date : 2007-11-24 17:55:21
  Hash : b14d6de7
  Message : xserver 1.4

• xserver/dix/pixmap.c

• /*
  
  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.
  
  */
  
  #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 */
  _X_EXPORT 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 */
  _X_EXPORT 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 */
  _X_EXPORT PixmapPtr
  AllocatePixmap(ScreenPtr pScreen, int pixDataSize)
  {
      PixmapPtr pPixmap;
      char *ptr;
      DevUnion *ppriv;
      unsigned *sizes;
      unsigned size;
      int i;
  
      if (pScreen->totalPixmapSize > ((size_t)-1) - pixDataSize)
  	return NullPixmap;
      
      pPixmap = (PixmapPtr)xalloc(pScreen->totalPixmapSize + pixDataSize);
      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;
      }
  
  #ifdef _XSERVER64
      if (pPixmap) {
  	pPixmap->drawable.pad0 = 0;
  	pPixmap->drawable.pad1 = 0;
      }
  #endif
  
      return pPixmap;
  }