diff options
Diffstat (limited to 'afb/afbsetsp.c')
| -rw-r--r-- | afb/afbsetsp.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/afb/afbsetsp.c b/afb/afbsetsp.c new file mode 100644 index 000000000..93331b857 --- /dev/null +++ b/afb/afbsetsp.c @@ -0,0 +1,265 @@ +/* $XFree86: xc/programs/Xserver/afb/afbsetsp.c,v 3.3 2001/10/28 03:32:58 tsi Exp $ */ +/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */ +/*********************************************************** + +Copyright (c) 1987 X Consortium + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +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 +X CONSORTIUM 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 X Consortium 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 X Consortium. + + +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. + +******************************************************************/ +/* $XConsortium: afbsetsp.c,v 5.8 94/04/17 20:28:34 dpw Exp $ */ + +#include "X.h" +#include "Xmd.h" + +#include "misc.h" +#include "regionstr.h" +#include "gcstruct.h" +#include "windowstr.h" +#include "pixmapstr.h" +#include "scrnintstr.h" + +#include "afb.h" +#include "maskbits.h" + +#include "servermd.h" + + +/* afbSetScanline -- 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.) + */ +void +afbSetScanline(y, xOrigin, xStart, xEnd, psrc, alu, pdstBase, widthDst, + sizeDst, depthDst, sizeSrc) + 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 PixelType *psrc; + register int alu; /* raster op */ + PixelType *pdstBase; /* start of the drawable */ + int widthDst; /* width of drawable in words */ + int sizeDst; + int depthDst; + int sizeSrc; +{ + int w; /* width of scanline in bits */ + register PixelType *pdst; /* where to put the bits */ + register PixelType 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; + PixelType startmask, endmask; + PixelType *savePsrc = psrc + ((xStart - xOrigin) >> PWSH); + int nlMiddle, nl; + int d; + + for (d = 0; d < depthDst; d++) { + pdst = afbScanline(pdstBase, xStart, y, widthDst) + sizeDst * d; /* @@@ NEXT PLANE @@@ */ + psrc = savePsrc + sizeSrc * d; /* @@@ NEXT PLANE @@@ */ + offSrc = (xStart - xOrigin) & PIM; + w = xEnd - xStart; + dstBit = xStart & PIM; + + if (dstBit + w <= PPW) { + getandputrop(psrc, offSrc, dstBit, w, pdst, alu) + } 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) { + getandputrop(psrc, offSrc, dstBit, nstart, pdst, alu) + pdst++; + offSrc += nstart; + if (offSrc > PLST) { + psrc++; + offSrc -= PPW; + } + } + nl = nlMiddle; + while (nl--) { + getbits(psrc, offSrc, PPW, tmpSrc); + DoRop(*pdst, alu, tmpSrc, *pdst); + pdst++; + psrc++; + } + if (endmask) { + getandputrop0(psrc, offSrc, nend, pdst, alu); + } + } + } +} + + + +/* 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 +afbSetSpans(pDrawable, pGC, pcharsrc, ppt, pwidth, nspans, fSorted) + DrawablePtr pDrawable; + GCPtr pGC; + char *pcharsrc; + register DDXPointPtr ppt; + int *pwidth; + int nspans; + int fSorted; +{ + PixelType *psrc = (PixelType *)pcharsrc; + PixelType *pdstBase; /* start of dst bitmap */ + int widthDst; /* width of bitmap in words */ + int sizeDst; + int depthDst; + int sizeSrc = 0; + register BoxPtr pbox, pboxLast, pboxTest; + register DDXPointPtr pptLast; + int alu; + RegionPtr prgnDst; + int xStart, xEnd; + int yMax; + + alu = pGC->alu; + prgnDst = pGC->pCompositeClip; + + pptLast = ppt + nspans; + + yMax = pDrawable->y + (int) pDrawable->height; + afbGetPixelWidthSizeDepthAndPointer(pDrawable, widthDst, sizeDst, depthDst, + pdstBase); + + 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); + sizeSrc = PixmapWidthInPadUnits(*pwidth, 1); + afbSetScanline(ppt->y, ppt->x, xStart, xEnd, psrc, alu, pdstBase, + widthDst, sizeDst, depthDst, sizeSrc); + 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 += sizeSrc * depthDst; + 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); + sizeSrc = PixmapWidthInPadUnits(*pwidth, 1); + afbSetScanline(ppt->y, ppt->x, xStart, xEnd, psrc, alu, + pdstBase, widthDst, sizeDst, depthDst, + sizeSrc); + } + + } + } + psrc += sizeSrc * depthDst; + ppt++; + pwidth++; + } + } +} |