395 lines
8.6 KiB
C
395 lines
8.6 KiB
C
|
|
#ifdef HAVE_XORG_CONFIG_H
|
|
#include <xorg-config.h>
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <X11/X.h>
|
|
#include "misc.h"
|
|
#include "xf86.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);
|
|
}
|
|
|