IABSD.fr/xenocara/xserver/cfb/cfbpush8.c

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• Author : matthieu
  Date : 2006-11-26 18:13:41
  Hash : 889b8606
  Message : Importing xserver from X.Org 7.2RC2

• xserver/cfb/cfbpush8.c

• /*
   * Push Pixels for 8 bit displays.
   */
  
  
  /*
  
  Copyright 1989, 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
  
  #if PSZ == 8
  
  #include	<X11/X.h>
  #include	<X11/Xmd.h>
  #include	<X11/Xproto.h>
  #include	"gcstruct.h"
  #include	"windowstr.h"
  #include	"scrnintstr.h"
  #include	"pixmapstr.h"
  #include	"regionstr.h"
  #include	"cfb.h"
  #include	"cfbmskbits.h"
  #include	"cfb8bit.h"
  #define MFB_CONSTS_ONLY
  #include	"maskbits.h"
  
  void
  cfbPushPixels8 (pGC, pBitmap, pDrawable, dx, dy, xOrg, yOrg)
      GCPtr	pGC;
      PixmapPtr	pBitmap;
      DrawablePtr	pDrawable;
      int		dx, dy, xOrg, yOrg;
  {
      register CfbBits   *src, *dst;
      register CfbBits   pixel;
      register CfbBits   c, bits;
      CfbBits   *pdstLine, *psrcLine;
      CfbBits   *pdstBase;
      int		    srcWidth;
      int		    dstWidth;
      int		    xoff;
      int		    nBitmapLongs, nPixmapLongs;
      int		    nBitmapTmp, nPixmapTmp;
      CfbBits   rightMask;
      BoxRec	    bbox;
      cfbPrivGCPtr    devPriv;
  
      bbox.x1 = xOrg;
      bbox.y1 = yOrg;
      bbox.x2 = bbox.x1 + dx;
      bbox.y2 = bbox.y1 + dy;
      devPriv = cfbGetGCPrivate(pGC);
      
      switch (RECT_IN_REGION(pGC->pScreen, pGC->pCompositeClip, &bbox))
      {
        case rgnPART:
  	mfbPushPixels(pGC, pBitmap, pDrawable, dx, dy, xOrg, yOrg);
        case rgnOUT:
  	return;
      }
  
      cfbGetLongWidthAndPointer (pDrawable, dstWidth, pdstBase)
  
      psrcLine = (CfbBits *) pBitmap->devPrivate.ptr;
      srcWidth = (int) pBitmap->devKind >> PWSH;
      
      pixel = devPriv->xor;
      xoff = xOrg & PIM;
      nBitmapLongs = (dx + xoff) >> MFB_PWSH;
      nPixmapLongs = (dx + PGSZB + xoff) >> PWSH;
  
      rightMask = ~cfb8BitLenMasks[((dx + xoff) & MFB_PIM)];
  
      pdstLine = pdstBase + (yOrg * dstWidth) + (xOrg >> PWSH);
  
      while (dy--)
      {
  	c = 0;
  	nPixmapTmp = nPixmapLongs;
  	nBitmapTmp = nBitmapLongs;
  	src = psrcLine;
  	dst = pdstLine;
  	while (nBitmapTmp--)
  	{
  	    bits = *src++;
  	    c |= BitRight (bits, xoff);
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	    nPixmapTmp -= 8;
  	    c = 0;
  	    if (xoff)
  		c = BitLeft (bits, PGSZ - xoff);
  	}
  	if (BitLeft (rightMask, xoff))
  	    c |= BitRight (*src, xoff);
  	c &= rightMask;
  	switch (nPixmapTmp) {
  	case 8:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 7:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 6:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 5:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 4:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 3:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 2:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 1:
  	    WriteBitGroup(dst, pixel, GetBitGroup(c));
  	    NextBitGroup(c);
  	    dst++;
  	case 0:
  	    break;
  	}
  	pdstLine += dstWidth;
  	psrcLine += srcWidth;
      }
  }
  
  #endif