330 lines
7.4 KiB
C
330 lines
7.4 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaDashLine.c,v 1.4 2001/10/28 03:34:04 tsi Exp $ */
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#include "X.h"
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#include "misc.h"
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#include "xf86.h"
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#include "xf86_ansic.h"
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#include "xf86_OSproc.h"
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#include "scrnintstr.h"
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#include "pixmapstr.h"
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#include "miline.h"
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#include "xf86str.h"
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#include "xaa.h"
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#include "xaalocal.h"
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void
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#ifdef POLYSEGMENT
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XAAPolySegmentDashed(
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DrawablePtr pDrawable,
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GCPtr pGC,
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int nseg,
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xSegment *pSeg
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#else
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XAAPolyLinesDashed(
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DrawablePtr pDrawable,
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GCPtr pGC,
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int mode, /* Origin or Previous */
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int npt, /* number of points */
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DDXPointPtr pptInit
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#endif
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){
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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XAAGCPtr pGCPriv = (XAAGCPtr) (pGC)->devPrivates[XAAGCIndex].ptr;
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BoxPtr pboxInit = REGION_RECTS(pGC->pCompositeClip);
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int nboxInit = REGION_NUM_RECTS(pGC->pCompositeClip);
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unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
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int xorg = pDrawable->x;
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int yorg = pDrawable->y;
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int nbox;
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BoxPtr pbox;
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#ifndef POLYSEGMENT
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DDXPointPtr ppt;
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#endif
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unsigned int oc1, oc2;
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int dmin, dmaj, e, octant;
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int x1, x2, y1, y2, tmp, len, offset;
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int PatternLength, PatternOffset;
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if(!nboxInit)
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return;
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if (infoRec->DashedLineFlags & LINE_LIMIT_COORDS) {
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int minValX = infoRec->DashedLineLimits.x1;
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int maxValX = infoRec->DashedLineLimits.x2;
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int minValY = infoRec->DashedLineLimits.y1;
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int maxValY = infoRec->DashedLineLimits.y2;
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#ifdef POLYSEGMENT
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int n = nseg;
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xSegment *s = pSeg;
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while (n--)
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#else
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int n = npt;
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int xorgtmp = xorg;
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int yorgtmp = yorg;
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ppt = pptInit;
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x2 = ppt->x + xorgtmp;
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y2 = ppt->y + yorgtmp;
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while (--n)
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#endif
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{
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#ifdef POLYSEGMENT
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x1 = s->x1 + xorg;
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y1 = s->y1 + yorg;
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x2 = s->x2 + xorg;
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y2 = s->y2 + yorg;
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s++;
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#else
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x1 = x2;
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y1 = y2;
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++ppt;
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if (mode == CoordModePrevious) {
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xorgtmp = x1;
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yorgtmp = y1;
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}
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x2 = ppt->x + xorgtmp;
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y2 = ppt->y + yorgtmp;
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#endif
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if (x1 > maxValX || x1 < minValX ||
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x2 > maxValX || x2 < minValX ||
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y1 > maxValY || y1 < minValY ||
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y2 > maxValY || y2 < minValY) {
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#ifdef POLYSEGMENT
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XAAFallbackOps.PolySegment(pDrawable, pGC, nseg, pSeg);
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#else
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XAAFallbackOps.Polylines(pDrawable, pGC, mode, npt, pptInit);
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#endif
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return;
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}
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}
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}
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PatternLength = pGCPriv->DashLength;
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PatternOffset = pGC->dashOffset % PatternLength;
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(*infoRec->SetupForDashedLine)(infoRec->pScrn, pGC->fgPixel,
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(pGC->lineStyle == LineDoubleDash) ? pGC->bgPixel : -1,
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pGC->alu, pGC->planemask, PatternLength, pGCPriv->DashPattern);
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#ifdef POLYSEGMENT
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while (nseg--)
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#else
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ppt = pptInit;
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x2 = ppt->x + xorg;
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y2 = ppt->y + yorg;
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while(--npt)
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#endif
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{
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nbox = nboxInit;
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pbox = pboxInit;
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#ifdef POLYSEGMENT
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x1 = pSeg->x1 + xorg;
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y1 = pSeg->y1 + yorg;
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x2 = pSeg->x2 + xorg;
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y2 = pSeg->y2 + yorg;
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pSeg++;
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#else
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x1 = x2;
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y1 = y2;
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++ppt;
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if (mode == CoordModePrevious) {
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xorg = x1;
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yorg = y1;
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}
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x2 = ppt->x + xorg;
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y2 = ppt->y + yorg;
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#endif
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if (infoRec->SubsequentDashedBresenhamLine) {
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if((dmaj = x2 - x1) < 0) {
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dmaj = -dmaj;
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octant = XDECREASING;
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} else octant = 0;
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if((dmin = y2 - y1) < 0) {
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dmin = -dmin;
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octant |= YDECREASING;
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}
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if(dmin >= dmaj){
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tmp = dmin; dmin = dmaj; dmaj = tmp;
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octant |= YMAJOR;
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}
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e = -dmaj - ((bias >> octant) & 1);
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len = dmaj;
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dmin <<= 1;
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dmaj <<= 1;
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} else { /* Muffle compiler */
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dmin = dmaj = e = octant = len = 0;
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}
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while(nbox--) {
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oc1 = oc2 = 0;
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OUTCODES(oc1, x1, y1, pbox);
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OUTCODES(oc2, x2, y2, pbox);
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if (!(oc1 | oc2)) { /* uncliped */
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if(infoRec->SubsequentDashedTwoPointLine) {
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(*infoRec->SubsequentDashedTwoPointLine)(
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infoRec->pScrn, x1, y1, x2, y2,
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#ifdef POLYSEGMENT
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(pGC->capStyle != CapNotLast) ? 0 :
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#endif
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OMIT_LAST, PatternOffset);
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} else {
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(*infoRec->SubsequentDashedBresenhamLine)(
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infoRec->pScrn, x1, y1, dmaj, dmin, e,
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#ifdef POLYSEGMENT
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(pGC->capStyle != CapNotLast) ? (len+1) :
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#endif
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len, octant, PatternOffset);
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}
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break;
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} else if (oc1 & oc2) { /* completely clipped */
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pbox++;
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} else if (infoRec->ClippingFlags & HARDWARE_CLIP_DASHED_LINE) {
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(*infoRec->SetClippingRectangle)(infoRec->pScrn,
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pbox->x1, pbox->y1, pbox->x2 - 1, pbox->y2 - 1);
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if(infoRec->SubsequentDashedBresenhamLine) {
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(*infoRec->SubsequentDashedBresenhamLine)(
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infoRec->pScrn, x1, y1, dmaj, dmin, e,
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#ifdef POLYSEGMENT
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(pGC->capStyle != CapNotLast) ? (len+1) :
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#endif
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len, octant, PatternOffset);
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} else {
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(*infoRec->SubsequentDashedTwoPointLine)(
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infoRec->pScrn, x1, y1, x2, y2,
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#ifdef POLYSEGMENT
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(pGC->capStyle != CapNotLast) ? 0 :
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#endif
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OMIT_LAST, PatternOffset
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);
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}
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(*infoRec->DisableClipping)(infoRec->pScrn);
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pbox++;
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} else {
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int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
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int clip1 = 0, clip2 = 0;
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int err, adx, ady;
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if(octant & YMAJOR) {
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ady = dmaj >> 1;
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adx = dmin >> 1;
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} else {
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ady = dmin >> 1;
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adx = dmaj >> 1;
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}
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if (miZeroClipLine(pbox->x1, pbox->y1,
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pbox->x2 - 1, pbox->y2 - 1,
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&new_x1, &new_y1, &new_x2, &new_y2,
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adx, ady, &clip1, &clip2,
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octant, bias, oc1, oc2) == -1)
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{
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pbox++;
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continue;
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}
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if (octant & YMAJOR)
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len = abs(new_y2 - new_y1);
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else
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len = abs(new_x2 - new_x1);
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#ifdef POLYSEGMENT
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if (clip2 != 0 || pGC->capStyle != CapNotLast)
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len++;
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#else
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len += (clip2 != 0);
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#endif
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if (len) {
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int abserr, clipdx, clipdy;
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/* unwind bresenham error term to first point */
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if (clip1) {
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clipdx = abs(new_x1 - x1);
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clipdy = abs(new_y1 - y1);
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if (octant & YMAJOR)
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err = e + clipdy*dmin - clipdx*dmaj;
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else
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err = e + clipdx*dmin - clipdy*dmaj;
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} else
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err = e;
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#define range infoRec->DashedBresenhamLineErrorTermBits
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abserr = abs(err);
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while((abserr & range) ||
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(dmaj & range) ||
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(dmin & range)) {
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dmin >>= 1;
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dmaj >>= 1;
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abserr >>= 1;
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err /= 2;
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}
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if(octant & YMAJOR)
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offset = abs(new_y1 - y1);
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else
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offset = abs(new_x1 - x1);
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offset += PatternOffset;
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offset %= PatternLength;
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(*infoRec->SubsequentDashedBresenhamLine)(
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infoRec->pScrn, new_x1, new_y1,
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dmaj, dmin, err, len, octant, offset);
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}
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pbox++;
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}
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} /* while (nbox--) */
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#ifndef POLYSEGMENT
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len = abs(y2 - y1);
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tmp = abs(x2 - x1);
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PatternOffset += (len > tmp) ? len : tmp;
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PatternOffset %= PatternLength;
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#endif
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} /* while (nline--) */
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#ifndef POLYSEGMENT
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/* paint the last point if the end style isn't CapNotLast.
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(Assume that a projecting, butt, or round cap that is one
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pixel wide is the same as the single pixel of the endpoint.)
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*/
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if ((pGC->capStyle != CapNotLast) &&
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((ppt->x + xorg != pptInit->x + pDrawable->x) ||
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(ppt->y + yorg != pptInit->y + pDrawable->y) ||
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(ppt == pptInit + 1)))
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{
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nbox = nboxInit;
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pbox = pboxInit;
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while (nbox--) {
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if ((x2 >= pbox->x1) && (y2 >= pbox->y1) &&
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(x2 < pbox->x2) && (y2 < pbox->y2))
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{
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if(infoRec->SubsequentDashedTwoPointLine) {
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(*infoRec->SubsequentDashedTwoPointLine)(
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infoRec->pScrn, x2, y2, x2, y2, 0,
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PatternOffset);
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} else {
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(*infoRec->SubsequentDashedBresenhamLine)(
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infoRec->pScrn, x2, y2, 2, 0, -1,
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1, 0, PatternOffset);
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}
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break;
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} else
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pbox++;
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}
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}
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#endif
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SET_SYNC_FLAG(infoRec);
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}
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