diff options
Diffstat (limited to 'hw/xfree86/xaa/xaaLine.c')
| -rw-r--r-- | hw/xfree86/xaa/xaaLine.c | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/hw/xfree86/xaa/xaaLine.c b/hw/xfree86/xaa/xaaLine.c new file mode 100644 index 000000000..2084e8d61 --- /dev/null +++ b/hw/xfree86/xaa/xaaLine.c @@ -0,0 +1,390 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaLine.c,v 1.6 2002/09/18 18:15:00 martin Exp $ */ + +#include "X.h" +#include "misc.h" +#include "xf86.h" +#include "xf86_ansic.h" +#include "xf86_OSproc.h" + +#include "scrnintstr.h" +#include "pixmapstr.h" +#include "miline.h" +#include "xf86str.h" +#include "xaa.h" +#include "xaalocal.h" + + +void +#ifdef POLYSEGMENT +XAAPolySegment( + DrawablePtr pDrawable, + GCPtr pGC, + int nseg, + xSegment *pSeg +#else +XAAPolyLines( + DrawablePtr pDrawable, + GCPtr pGC, + int mode, /* Origin or Previous */ + int npt, /* number of points */ + DDXPointPtr pptInit +#endif +){ + XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC); + BoxPtr pboxInit = REGION_RECTS(pGC->pCompositeClip); + int nboxInit = REGION_NUM_RECTS(pGC->pCompositeClip); + unsigned int bias = miGetZeroLineBias(pDrawable->pScreen); + int xorg = pDrawable->x; + int yorg = pDrawable->y; + int nbox; + BoxPtr pbox; +#ifndef POLYSEGMENT + DDXPointPtr ppt; +#endif + int x1, x2, y1, y2, tmp, len; + + if(!nboxInit) + return; + + if (infoRec->SolidLineFlags & LINE_LIMIT_COORDS) { + int minValX = infoRec->SolidLineLimits.x1; + int maxValX = infoRec->SolidLineLimits.x2; + int minValY = infoRec->SolidLineLimits.y1; + int maxValY = infoRec->SolidLineLimits.y2; +#ifdef POLYSEGMENT + int n = nseg; + xSegment *s = pSeg; + + while (n--) +#else + int n = npt; + int xorgtmp = xorg; + int yorgtmp = yorg; + + ppt = pptInit; + x2 = ppt->x + xorgtmp; + y2 = ppt->y + yorgtmp; + while (--n) +#endif + { +#ifdef POLYSEGMENT + x1 = s->x1 + xorg; + y1 = s->y1 + yorg; + x2 = s->x2 + xorg; + y2 = s->y2 + yorg; + s++; +#else + x1 = x2; + y1 = y2; + ++ppt; + if (mode == CoordModePrevious) { + xorgtmp = x1; + yorgtmp = y1; + } + x2 = ppt->x + xorgtmp; + y2 = ppt->y + yorgtmp; +#endif + if (x1 > maxValX || x1 < minValX || + x2 > maxValX || x2 < minValX || + y1 > maxValY || y1 < minValY || + y2 > maxValY || y2 < minValY) { +#ifdef POLYSEGMENT + XAAFallbackOps.PolySegment(pDrawable, pGC, nseg, pSeg); +#else + XAAFallbackOps.Polylines(pDrawable, pGC, mode, npt, pptInit); +#endif + return; + } + } + } + + (*infoRec->SetupForSolidLine)(infoRec->pScrn, pGC->fgPixel, + pGC->alu, pGC->planemask); + +#ifdef POLYSEGMENT + while (nseg--) +#else + ppt = pptInit; + x2 = ppt->x + xorg; + y2 = ppt->y + yorg; + while(--npt) +#endif + { + nbox = nboxInit; + pbox = pboxInit; + +#ifdef POLYSEGMENT + x1 = pSeg->x1 + xorg; + y1 = pSeg->y1 + yorg; + x2 = pSeg->x2 + xorg; + y2 = pSeg->y2 + yorg; + pSeg++; +#else + x1 = x2; + y1 = y2; + ++ppt; + if (mode == CoordModePrevious) { + xorg = x1; + yorg = y1; + } + x2 = ppt->x + xorg; + y2 = ppt->y + yorg; +#endif + + if (x1 == x2) { /* vertical line */ + /* make the line go top to bottom of screen, keeping + endpoint semantics + */ + if (y1 > y2) { + tmp = y2; + y2 = y1 + 1; + y1 = tmp + 1; +#ifdef POLYSEGMENT + if (pGC->capStyle != CapNotLast) y1--; +#endif + } +#ifdef POLYSEGMENT + else if (pGC->capStyle != CapNotLast) y2++; +#endif + /* get to first band that might contain part of line */ + while(nbox && (pbox->y2 <= y1)) { + pbox++; + nbox--; + } + + /* stop when lower edge of box is beyond end of line */ + while(nbox && (y2 >= pbox->y1)) { + if ((x1 >= pbox->x1) && (x1 < pbox->x2)) { + tmp = max(y1, pbox->y1); + len = min(y2, pbox->y2) - tmp; + if (len) (*infoRec->SubsequentSolidHorVertLine)( + infoRec->pScrn, x1, tmp, len, DEGREES_270); + } + nbox--; + pbox++; + } +#ifndef POLYSEGMENT + y2 = ppt->y + yorg; +#endif + } else if (y1 == y2) { /* horizontal line */ + /* force line from left to right, keeping endpoint semantics */ + if (x1 > x2) { + tmp = x2; + x2 = x1 + 1; + x1 = tmp + 1; +#ifdef POLYSEGMENT + if (pGC->capStyle != CapNotLast) x1--; +#endif + } +#ifdef POLYSEGMENT + else if (pGC->capStyle != CapNotLast) x2++; +#endif + + /* find the correct band */ + while(nbox && (pbox->y2 <= y1)) { + pbox++; + nbox--; + } + + /* try to draw the line, if we haven't gone beyond it */ + if (nbox && (pbox->y1 <= y1)) { + int orig_y = pbox->y1; + /* when we leave this band, we're done */ + while(nbox && (orig_y == pbox->y1)) { + if (pbox->x2 <= x1) { + /* skip boxes until one might contain start point */ + nbox--; + pbox++; + continue; + } + + /* stop if left of box is beyond right of line */ + if (pbox->x1 >= x2) { + nbox = 0; + break; + } + + tmp = max(x1, pbox->x1); + len = min(x2, pbox->x2) - tmp; + if (len) (*infoRec->SubsequentSolidHorVertLine)( + infoRec->pScrn, tmp, y1, len, DEGREES_0); + nbox--; + pbox++; + } + } +#ifndef POLYSEGMENT + x2 = ppt->x + xorg; +#endif + } else{ /* sloped line */ + unsigned int oc1, oc2; + int dmin, dmaj, e, octant; + + if (infoRec->SubsequentSolidBresenhamLine) { + if((dmaj = x2 - x1) < 0) { + dmaj = -dmaj; + octant = XDECREASING; + } else octant = 0; + + if((dmin = y2 - y1) < 0) { + dmin = -dmin; + octant |= YDECREASING; + } + + if(dmin >= dmaj){ + tmp = dmin; dmin = dmaj; dmaj = tmp; + octant |= YMAJOR; + } + + e = -dmaj - ((bias >> octant) & 1); + len = dmaj; + dmin <<= 1; + dmaj <<= 1; + } else { /* Muffle compiler */ + dmin = dmaj = e = octant = len = 0; + } + + while(nbox--) { + oc1 = oc2 = 0; + OUTCODES(oc1, x1, y1, pbox); + OUTCODES(oc2, x2, y2, pbox); + if (!(oc1 | oc2)) { /* unclipped */ + if(infoRec->SubsequentSolidTwoPointLine) { + (*infoRec->SubsequentSolidTwoPointLine)( + infoRec->pScrn, x1, y1, x2, y2, +#ifdef POLYSEGMENT + (pGC->capStyle != CapNotLast) ? 0 : +#endif + OMIT_LAST + ); + } else { + (*infoRec->SubsequentSolidBresenhamLine)( + infoRec->pScrn, x1, y1, dmaj, dmin, e, +#ifdef POLYSEGMENT + (pGC->capStyle != CapNotLast) ? (len+1) : +#endif + len, octant); + } + break; + } else if (oc1 & oc2) { /* completely clipped */ + pbox++; + } else if (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_LINE) { + (*infoRec->SetClippingRectangle)(infoRec->pScrn, + pbox->x1, pbox->y1, pbox->x2 - 1, pbox->y2 - 1); + + if(infoRec->SubsequentSolidBresenhamLine) { + (*infoRec->SubsequentSolidBresenhamLine)( + infoRec->pScrn, x1, y1, dmaj, dmin, e, +#ifdef POLYSEGMENT + (pGC->capStyle != CapNotLast) ? (len+1) : +#endif + len, octant); + } else { + (*infoRec->SubsequentSolidTwoPointLine)( + infoRec->pScrn, x1, y1, x2, y2, +#ifdef POLYSEGMENT + (pGC->capStyle != CapNotLast) ? 0 : +#endif + OMIT_LAST + ); + } + (*infoRec->DisableClipping)(infoRec->pScrn); + pbox++; + } else { + int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2; + int clip1 = 0, clip2 = 0; + int err, adx, ady; + + if(octant & YMAJOR) { + ady = dmaj >> 1; + adx = dmin >> 1; + } else { + ady = dmin >> 1; + adx = dmaj >> 1; + } + + if (miZeroClipLine(pbox->x1, pbox->y1, + pbox->x2 - 1, pbox->y2 - 1, + &new_x1, &new_y1, &new_x2, &new_y2, + adx, ady, &clip1, &clip2, + octant, bias, oc1, oc2) == -1) + { + pbox++; + continue; + } + + if (octant & YMAJOR) + len = abs(new_y2 - new_y1); + else + len = abs(new_x2 - new_x1); +#ifdef POLYSEGMENT + if (clip2 != 0 || pGC->capStyle != CapNotLast) + len++; +#else + len += (clip2 != 0); +#endif + if (len) { + int abserr, clipdx, clipdy; + /* unwind bresenham error term to first point */ + if (clip1) { + clipdx = abs(new_x1 - x1); + clipdy = abs(new_y1 - y1); + + if (octant & YMAJOR) + err = e + clipdy*dmin - clipdx*dmaj; + else + err = e + clipdx*dmin - clipdy*dmaj; + } else + err = e; + +#define range infoRec->SolidBresenhamLineErrorTermBits + abserr = abs(err); + while((abserr & range) || + (dmaj & range) || + (dmin & range)) { + dmin >>= 1; + dmaj >>= 1; + abserr >>= 1; + err /= 2; + } + + (*infoRec->SubsequentSolidBresenhamLine)( + infoRec->pScrn, new_x1, new_y1, + dmaj, dmin, err, len, octant); + } + pbox++; + } + } /* while (nbox--) */ + } /* sloped line */ + } /* while (nline--) */ + +#ifndef POLYSEGMENT + /* paint the last point if the end style isn't CapNotLast. + (Assume that a projecting, butt, or round cap that is one + pixel wide is the same as the single pixel of the endpoint.) + */ + + if ((pGC->capStyle != CapNotLast) && + ((ppt->x + xorg != pptInit->x + pDrawable->x) || + (ppt->y + yorg != pptInit->y + pDrawable->y) || + (ppt == pptInit + 1))) + { + nbox = nboxInit; + pbox = pboxInit; + while (nbox--) + { + if ((x2 >= pbox->x1) && (y2 >= pbox->y1) && + (x2 < pbox->x2) && (y2 < pbox->y2)) + { + (*infoRec->SubsequentSolidHorVertLine)( + infoRec->pScrn, x2, y2, 1, DEGREES_0); + break; + } + else + pbox++; + } + } +#endif + + SET_SYNC_FLAG(infoRec); +} + |