282 lines
7.9 KiB
C
282 lines
7.9 KiB
C
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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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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <X11/X.h>
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#include <X11/Xmd.h>
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#include "misc.h"
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#include "regionstr.h"
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#include "gcstruct.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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/* mfbSetScanline -- copies the bits from psrc to the drawable starting at
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* (xStart, y) and continuing to (xEnd, y). xOrigin tells us where psrc
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* starts on the scanline. (I.e., if this scanline passes through multiple
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* boxes, we may not want to start grabbing bits at psrc but at some offset
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* further on.)
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*/
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void
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mfbSetScanline(y, xOrigin, xStart, xEnd, psrc, alu, pdstBase, widthDst)
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int y;
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int xOrigin; /* where this scanline starts */
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int xStart; /* first bit to use from scanline */
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int xEnd; /* last bit to use from scanline + 1 */
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register PixelType *psrc;
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register int alu; /* raster op */
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PixelType *pdstBase; /* start of the drawable */
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int widthDst; /* width of drawable in words */
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{
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int w; /* width of scanline in bits */
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register PixelType *pdst; /* where to put the bits */
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register PixelType tmpSrc; /* scratch buffer to collect bits in */
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int dstBit; /* offset in bits from beginning of
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* word */
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register int nstart; /* number of bits from first partial */
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register int nend; /* " " last partial word */
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int offSrc;
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PixelType startmask, endmask;
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int nlMiddle, nl;
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pdst = mfbScanline(pdstBase, xStart, y, widthDst);
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psrc += (xStart - xOrigin) >> PWSH;
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offSrc = (xStart - xOrigin) & PIM;
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w = xEnd - xStart;
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dstBit = xStart & PIM;
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if (dstBit + w <= PPW)
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{
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getandputrop(psrc, offSrc, dstBit, w, pdst, alu)
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}
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else
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{
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maskbits(xStart, w, startmask, endmask, nlMiddle);
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if (startmask)
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nstart = PPW - dstBit;
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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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else
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nend = 0;
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if (startmask)
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{
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getandputrop(psrc, offSrc, dstBit, nstart, pdst, alu)
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pdst++;
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offSrc += nstart;
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if (offSrc > PLST)
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{
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psrc++;
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offSrc -= PPW;
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}
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}
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nl = nlMiddle;
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while (nl--)
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{
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getbits(psrc, offSrc, PPW, tmpSrc);
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DoRop(*pdst, alu, tmpSrc, *pdst);
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pdst++;
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psrc++;
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}
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if (endmask)
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{
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getandputrop0(psrc, offSrc, nend, pdst, alu);
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}
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}
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}
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/* SetSpans -- for each span copy pwidth[i] bits from psrc to pDrawable at
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* ppt[i] using the raster op from the GC. If fSorted is TRUE, the scanlines
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* are in increasing Y order.
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* Source bit lines are server scanline padded so that they always begin
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* on a word boundary.
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*/
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void
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mfbSetSpans(pDrawable, pGC, pcharsrc, ppt, pwidth, nspans, fSorted)
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DrawablePtr pDrawable;
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GCPtr pGC;
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char *pcharsrc;
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register DDXPointPtr ppt;
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int *pwidth;
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int nspans;
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int fSorted;
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{
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PixelType *psrc = (PixelType *)(pointer)pcharsrc;
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PixelType *pdstBase; /* start of dst bitmap */
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int widthDst; /* width of bitmap in words */
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register BoxPtr pbox, pboxLast, pboxTest;
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register DDXPointPtr pptLast;
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int alu;
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RegionPtr prgnDst;
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int xStart, xEnd;
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int yMax;
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alu = pGC->alu;
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prgnDst = pGC->pCompositeClip;
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pptLast = ppt + nspans;
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yMax = pDrawable->y + (int) pDrawable->height;
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mfbGetPixelWidthAndPointer(pDrawable, widthDst, pdstBase);
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pbox = REGION_RECTS(prgnDst);
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pboxLast = pbox + REGION_NUM_RECTS(prgnDst);
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if(fSorted)
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{
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/* scan lines sorted in ascending order. Because they are sorted, we
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* don't have to check each scanline against each clip box. We can be
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* sure that this scanline only has to be clipped to boxes at or after the
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* beginning of this y-band
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*/
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pboxTest = pbox;
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while(ppt < pptLast)
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{
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pbox = pboxTest;
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if(ppt->y >= yMax)
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break;
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while(pbox < pboxLast)
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{
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if(pbox->y1 > ppt->y)
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{
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/* scanline is before clip box */
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break;
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}
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else if(pbox->y2 <= ppt->y)
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{
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/* clip box is before scanline */
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pboxTest = ++pbox;
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continue;
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}
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else if(pbox->x1 > ppt->x + *pwidth)
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{
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/* clip box is to right of scanline */
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break;
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}
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else if(pbox->x2 <= ppt->x)
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{
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/* scanline is to right of clip box */
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pbox++;
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continue;
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}
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/* at least some of the scanline is in the current clip box */
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xStart = max(pbox->x1, ppt->x);
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xEnd = min(ppt->x + *pwidth, pbox->x2);
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mfbSetScanline(ppt->y, ppt->x, xStart, xEnd, psrc, alu,
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pdstBase, widthDst);
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if(ppt->x + *pwidth <= pbox->x2)
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{
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/* End of the line, as it were */
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break;
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}
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else
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pbox++;
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}
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/* We've tried this line against every box; it must be outside them
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* all. move on to the next point */
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ppt++;
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psrc += PixmapWidthInPadUnits(*pwidth, 1);
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pwidth++;
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}
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}
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else
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{
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/* scan lines not sorted. We must clip each line against all the boxes */
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while(ppt < pptLast)
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{
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if(ppt->y >= 0 && ppt->y < yMax)
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{
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for(pbox = REGION_RECTS(prgnDst); pbox< pboxLast; pbox++)
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{
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if(pbox->y1 > ppt->y)
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{
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/* rest of clip region is above this scanline,
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* skip it */
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break;
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}
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if(pbox->y2 <= ppt->y)
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{
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/* clip box is below scanline */
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pbox++;
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break;
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}
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if(pbox->x1 <= ppt->x + *pwidth &&
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pbox->x2 > ppt->x)
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{
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xStart = max(pbox->x1, ppt->x);
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xEnd = min(pbox->x2, ppt->x + *pwidth);
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mfbSetScanline(ppt->y, ppt->x, xStart, xEnd,
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psrc, alu, pdstBase, widthDst);
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}
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}
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}
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psrc += PixmapWidthInPadUnits(*pwidth, 1);
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ppt++;
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pwidth++;
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}
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}
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}
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