156 lines
5.1 KiB
C
156 lines
5.1 KiB
C
/* $XFree86: xc/programs/Xserver/mfb/mfbgetsp.c,v 1.3tsi Exp $ */
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/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
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/***********************************************************
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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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, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/* $Xorg: mfbgetsp.c,v 1.4 2001/02/09 02:05:19 xorgcvs Exp $ */
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#include "X.h"
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#include "Xmd.h"
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#include "misc.h"
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#include "region.h"
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#include "gc.h"
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#include "windowstr.h"
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#include "pixmapstr.h"
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#include "scrnintstr.h"
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#include "mfb.h"
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#include "maskbits.h"
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#include "servermd.h"
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/* GetSpans -- for each span, gets bits from drawable starting at ppt[i]
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* and continuing for pwidth[i] bits
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* Each scanline returned will be server scanline padded, i.e., it will come
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* out to an integral number of words.
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*/
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/*ARGSUSED*/
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void
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mfbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pchardstStart)
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DrawablePtr pDrawable; /* drawable from which to get bits */
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int wMax; /* largest value of all *pwidths */
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register DDXPointPtr ppt; /* points to start copying from */
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int *pwidth; /* list of number of bits to copy */
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int nspans; /* number of scanlines to copy */
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char *pchardstStart; /* where to put the bits */
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{
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PixelType *pdstStart = (PixelType *)(pointer)pchardstStart;
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register PixelType *pdst; /* where to put the bits */
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register PixelType *psrc; /* where to get the bits */
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register PixelType tmpSrc; /* scratch buffer for bits */
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PixelType *psrcBase; /* start of src bitmap */
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int widthSrc; /* width of pixmap in bytes */
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register DDXPointPtr pptLast; /* one past last point to get */
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int xEnd; /* last pixel to copy from */
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register int nstart;
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int nend = 0;
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int srcStartOver;
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PixelType startmask, endmask;
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unsigned int srcBit;
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int nlMiddle, nl;
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int w;
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pptLast = ppt + nspans;
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mfbGetPixelWidthAndPointer(pDrawable, widthSrc, psrcBase);
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pdst = pdstStart;
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while(ppt < pptLast)
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{
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/* XXX should this really be << PWSH, or * 8, or * PGSZB? */
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xEnd = min(ppt->x + *pwidth, widthSrc << PWSH);
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pwidth++;
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psrc = mfbScanline(psrcBase, ppt->x, ppt->y, widthSrc);
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w = xEnd - ppt->x;
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srcBit = ppt->x & PIM;
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if (srcBit + w <= PPW)
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{
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getandputbits0(psrc, srcBit, w, pdst);
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pdst++;
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}
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else
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{
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maskbits(ppt->x, w, startmask, endmask, nlMiddle);
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if (startmask)
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nstart = PPW - srcBit;
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else
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nstart = 0;
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if (endmask)
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nend = xEnd & PIM;
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srcStartOver = srcBit + nstart > PLST;
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if (startmask)
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{
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getandputbits0(psrc, srcBit, nstart, pdst);
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if(srcStartOver)
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psrc++;
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}
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nl = nlMiddle;
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#ifdef FASTPUTBITS
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Duff(nl, putbits(*psrc, nstart, PPW, pdst); psrc++; pdst++;);
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#else
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while (nl--)
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{
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tmpSrc = *psrc;
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putbits(tmpSrc, nstart, PPW, pdst);
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psrc++;
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pdst++;
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}
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#endif
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if (endmask)
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{
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putbits(*psrc, nstart, nend, pdst);
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if(nstart + nend > PPW)
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pdst++;
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}
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if (startmask || endmask)
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pdst++;
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}
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ppt++;
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}
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}
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