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Diffstat (limited to 'cfb/cfbsetsp.c')
| -rw-r--r-- | cfb/cfbsetsp.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/cfb/cfbsetsp.c b/cfb/cfbsetsp.c new file mode 100644 index 000000000..4a3d2fbfe --- /dev/null +++ b/cfb/cfbsetsp.c @@ -0,0 +1,280 @@ +/* $Xorg: cfbsetsp.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 "regionstr.h" +#include "gcstruct.h" +#include "windowstr.h" +#include "pixmapstr.h" +#include "scrnintstr.h" + +#include "cfb.h" +#include "cfbmskbits.h" +#include <mergerop.h> + +/* cfbSetScanline -- copies the bits from psrc to the drawable starting at + * (xStart, y) and continuing to (xEnd, y). xOrigin tells us where psrc + * starts on the scanline. (I.e., if this scanline passes through multiple + * boxes, we may not want to start grabbing bits at psrc but at some offset + * further on.) + */ +cfbSetScanline(y, xOrigin, xStart, xEnd, psrc, alu, pdstBase, widthDst, planemask) + int y; + int xOrigin; /* where this scanline starts */ + int xStart; /* first bit to use from scanline */ + int xEnd; /* last bit to use from scanline + 1 */ + register unsigned int *psrc; + register int alu; /* raster op */ + int *pdstBase; /* start of the drawable */ + int widthDst; /* width of drawable in words */ + unsigned long planemask; +{ + int w; /* width of scanline in bits */ + register int *pdst; /* where to put the bits */ + register int tmpSrc; /* scratch buffer to collect bits in */ + int dstBit; /* offset in bits from beginning of + * word */ + register int nstart; /* number of bits from first partial */ + register int nend; /* " " last partial word */ + int offSrc; + int startmask, endmask, nlMiddle, nl; + DeclareMergeRop() + + InitializeMergeRop(alu,planemask); + pdst = pdstBase + (y * widthDst) + (xStart >> PWSH); + psrc += (xStart - xOrigin) >> PWSH; + offSrc = (xStart - xOrigin) & PIM; + w = xEnd - xStart; + dstBit = xStart & PIM; + + if (dstBit + w <= PPW) + { + maskpartialbits(dstBit, w, startmask); + endmask = 0; + nlMiddle = 0; + } + else + { + maskbits(xStart, w, startmask, endmask, nlMiddle); + } + if (startmask) + nstart = PPW - dstBit; + else + nstart = 0; + if (endmask) + nend = xEnd & PIM; + else + nend = 0; + if (startmask) + { + getbits(psrc, offSrc, nstart, tmpSrc); + putbitsmropshort(tmpSrc, dstBit, nstart, pdst); + pdst++; + offSrc += nstart; + if (offSrc > PLST) + { + psrc++; + offSrc -= PPW; + } + } + nl = nlMiddle; + while (nl--) + { + getbits(psrc, offSrc, PPW, tmpSrc); + *pdst = DoMergeRop(tmpSrc, *pdst); + pdst++; + psrc++; + } + if (endmask) + { + getbits(psrc, offSrc, nend, tmpSrc); + putbitsmropshort(tmpSrc, 0, nend, pdst); + } +} + + + +/* SetSpans -- for each span copy pwidth[i] bits from psrc to pDrawable at + * ppt[i] using the raster op from the GC. If fSorted is TRUE, the scanlines + * are in increasing Y order. + * Source bit lines are server scanline padded so that they always begin + * on a word boundary. + */ +void +cfbSetSpans(pDrawable, pGC, pcharsrc, ppt, pwidth, nspans, fSorted) + DrawablePtr pDrawable; + GCPtr pGC; + char *pcharsrc; + register DDXPointPtr ppt; + int *pwidth; + int nspans; + int fSorted; +{ + unsigned int *psrc = (unsigned int *)pcharsrc; + unsigned long *pdstBase; /* start of dst bitmap */ + int widthDst; /* width of bitmap in words */ + register BoxPtr pbox, pboxLast, pboxTest; + register DDXPointPtr pptLast; + int alu; + RegionPtr prgnDst; + int xStart, xEnd; + int yMax; + + alu = pGC->alu; + prgnDst = cfbGetCompositeClip(pGC); + pptLast = ppt + nspans; + + cfbGetLongWidthAndPointer (pDrawable, widthDst, pdstBase) + + yMax = (int) pDrawable->y + (int) pDrawable->height; + + pbox = REGION_RECTS(prgnDst); + pboxLast = pbox + REGION_NUM_RECTS(prgnDst); + + if(fSorted) + { + /* scan lines sorted in ascending order. Because they are sorted, we + * don't have to check each scanline against each clip box. We can be + * sure that this scanline only has to be clipped to boxes at or after the + * beginning of this y-band + */ + pboxTest = pbox; + while(ppt < pptLast) + { + pbox = pboxTest; + if(ppt->y >= yMax) + break; + while(pbox < pboxLast) + { + if(pbox->y1 > ppt->y) + { + /* scanline is before clip box */ + break; + } + else if(pbox->y2 <= ppt->y) + { + /* clip box is before scanline */ + pboxTest = ++pbox; + continue; + } + else if(pbox->x1 > ppt->x + *pwidth) + { + /* clip box is to right of scanline */ + break; + } + else if(pbox->x2 <= ppt->x) + { + /* scanline is to right of clip box */ + pbox++; + continue; + } + + /* at least some of the scanline is in the current clip box */ + xStart = max(pbox->x1, ppt->x); + xEnd = min(ppt->x + *pwidth, pbox->x2); + cfbSetScanline(ppt->y, ppt->x, xStart, xEnd, psrc, alu, + (int *)pdstBase, widthDst, pGC->planemask); + if(ppt->x + *pwidth <= pbox->x2) + { + /* End of the line, as it were */ + break; + } + else + pbox++; + } + /* We've tried this line against every box; it must be outside them + * all. move on to the next point */ + ppt++; + psrc += PixmapWidthInPadUnits(*pwidth, pDrawable->depth); + pwidth++; + } + } + else + { + /* scan lines not sorted. We must clip each line against all the boxes */ + while(ppt < pptLast) + { + if(ppt->y >= 0 && ppt->y < yMax) + { + + for(pbox = REGION_RECTS(prgnDst); pbox< pboxLast; pbox++) + { + if(pbox->y1 > ppt->y) + { + /* rest of clip region is above this scanline, + * skip it */ + break; + } + if(pbox->y2 <= ppt->y) + { + /* clip box is below scanline */ + pbox++; + break; + } + if(pbox->x1 <= ppt->x + *pwidth && + pbox->x2 > ppt->x) + { + xStart = max(pbox->x1, ppt->x); + xEnd = min(pbox->x2, ppt->x + *pwidth); + cfbSetScanline(ppt->y, ppt->x, xStart, xEnd, psrc, alu, + (int *)pdstBase, widthDst, pGC->planemask); + } + + } + } + psrc += PixmapWidthInPadUnits(*pwidth, pDrawable->depth); + ppt++; + pwidth++; + } + } +} + |