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Diffstat (limited to 'cfb/cfbgetsp.c')
| -rw-r--r-- | cfb/cfbgetsp.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/cfb/cfbgetsp.c b/cfb/cfbgetsp.c new file mode 100644 index 000000000..a2c9966df --- /dev/null +++ b/cfb/cfbgetsp.c @@ -0,0 +1,164 @@ +/* $Xorg: cfbgetsp.c,v 1.4 2001/02/09 02:04:38 xorgcvs Exp $ */ +/*********************************************************** + +Copyright 1987, 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. + + +Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of Digital not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +******************************************************************/ + +#include "X.h" +#include "Xmd.h" +#include "servermd.h" + +#include "misc.h" +#include "region.h" +#include "gc.h" +#include "windowstr.h" +#include "pixmapstr.h" +#include "scrnintstr.h" + +#include "cfb.h" +#include "cfbmskbits.h" + +/* GetSpans -- for each span, gets bits from drawable starting at ppt[i] + * and continuing for pwidth[i] bits + * Each scanline returned will be server scanline padded, i.e., it will come + * out to an integral number of words. + */ +void +cfbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pchardstStart) + DrawablePtr pDrawable; /* drawable from which to get bits */ + int wMax; /* largest value of all *pwidths */ + register DDXPointPtr ppt; /* points to start copying from */ + int *pwidth; /* list of number of bits to copy */ + int nspans; /* number of scanlines to copy */ + char *pchardstStart; /* where to put the bits */ +{ + PixelGroup *pdstStart = (PixelGroup *)pchardstStart; + register PixelGroup *pdst; /* where to put the bits */ + register PixelGroup *psrc; /* where to get the bits */ + register PixelGroup tmpSrc; /* scratch buffer for bits */ + PixelGroup *psrcBase; /* start of src bitmap */ + int widthSrc; /* width of pixmap in bytes */ + register DDXPointPtr pptLast; /* one past last point to get */ + int xEnd; /* last pixel to copy from */ + register int nstart; + int nend; + PixelGroup startmask, endmask; + int nlMiddle, nl, srcBit; + int w; + PixelGroup *pdstNext; + + switch (pDrawable->bitsPerPixel) { + case 1: + mfbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pchardstStart); + return; + case PSZ: + break; + default: + FatalError("cfbGetSpans: invalid depth\n"); + } + + + cfbGetLongWidthAndPointer (pDrawable, widthSrc, psrcBase) + +#ifdef PIXEL_ADDR + if ((nspans == 1) && (*pwidth == 1)) + { + tmpSrc = *((PixelType *)(psrcBase + (ppt->y * widthSrc)) + + ppt->x); +#if BITMAP_BIT_ORDER == MSBFirst + tmpSrc <<= (sizeof (unsigned long) - sizeof (PixelType)) * 8; +#endif + *pdstStart = tmpSrc; + return; + } +#endif + pdst = pdstStart; + pptLast = ppt + nspans; + while(ppt < pptLast) + { + xEnd = min(ppt->x + *pwidth, widthSrc << PWSH); + psrc = psrcBase + ppt->y * widthSrc + (ppt->x >> PWSH); + w = xEnd - ppt->x; + srcBit = ppt->x & PIM; + pdstNext = pdst + ((w + PPW - 1) >> PWSH); + + if (srcBit + w <= PPW) + { + getbits(psrc, srcBit, w, tmpSrc); + putbits(tmpSrc, 0, w, pdst, ~((unsigned long)0)); + pdst++; + } + else + { + maskbits(ppt->x, w, startmask, endmask, nlMiddle); + nstart = 0; + if (startmask) + { + nstart = PPW - srcBit; + getbits(psrc, srcBit, nstart, tmpSrc); + putbits(tmpSrc, 0, nstart, pdst, ~((unsigned long)0)); + if(srcBit + nstart >= PPW) + psrc++; + } + nl = nlMiddle; + while (nl--) + { + tmpSrc = *psrc; + putbits(tmpSrc, nstart, PPW, pdst, ~((unsigned long)0)); + psrc++; + pdst++; + } + if (endmask) + { + nend = xEnd & PIM; + getbits(psrc, 0, nend, tmpSrc); + putbits(tmpSrc, nstart, nend, pdst, ~((unsigned long)0)); + } + pdst = pdstNext; + } + ppt++; + pwidth++; + } +} |