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#include <config.h>
#include "splash/SplashXPathScanner.h"
#include "OPVPSplashClip.h"
void OPVPSplashClip::getBBox(int *xMinA, int *yMinA, int *xMaxA, int *yMaxA)
{
int i;
int cxMin = splashRound(xMin), cyMin = splashRound(yMin);
int cxMax = splashRound(xMax), cyMax = splashRound(yMax);
int txMin, tyMin, txMax, tyMax;
for (i = 0; i < length; ++i) {
scanners[i]->getBBox(&txMin,&tyMin,&txMax,&tyMax);
if (txMin > cxMin) cxMin = txMin;
if (tyMin > cyMin) cyMin = tyMin;
if (txMax < cxMax) cxMax = txMax;
if (tyMax < cyMax) cyMax = tyMax;
}
*xMinA = cxMin;
*yMinA = cyMin;
*xMaxA = cxMax;
*yMaxA = cyMax;
}
OPVPSplashPath *OPVPSplashClip::makePath()
{
int i,j;
int y, x0, x1;
int txMin, tyMin, txMax, tyMax;
int tsxMin, tsyMin, tsxMax, tsyMax;
Guchar *cbuf,*tbuf;
int blen;
OPVPSplashPath *p = new OPVPSplashPath();
getBBox(&txMin,&tyMin,&txMax,&tyMax);
if (txMin > txMax || tyMin > tyMax) return p;
blen = txMax-txMin+1;
cbuf = new Guchar[blen];
tbuf = new Guchar[blen];
/* dummy call to clear state */
scanners[0]->getBBox(&tsxMin,&tsyMin,&tsxMax,&tsyMax);
scanners[0]->getNextSpan(tsyMin-2,&x0,&x1);
for (y = tyMin;y <= tyMax;y++) {
/* clear buffer */
for (i = 0;i < blen;i++) {
cbuf[i] = 0;
}
while (scanners[0]->getNextSpan(y,&x0,&x1)) {
if (x0 < txMin) x0 = txMin;
if (x1 > txMax) x1 = txMax;
for (i = x0;i < x1;i++) {
cbuf[i-txMin] = 1;
}
}
for (j = 1; j < length; ++j) {
/* clear buffer */
for (i = 0;i < blen;i++) {
tbuf[i] = 0;
}
while (scanners[j]->getNextSpan(y,&x0,&x1)) {
if (x0 < txMin) x0 = txMin;
if (x1 > txMax) x1 = txMax;
for (i = x0;i < x1;i++) {
tbuf[i-txMin] = 1;
}
}
/* and buffer */
for (i = 0;i < blen;i++) {
cbuf[i] &= tbuf[i];
}
}
/* scan buffer and add path */
for (i = 0;i < blen;i = j) {
if (cbuf[i] != 0) {
p->moveTo(i+txMin,y);
for (j = i+1;j < blen && cbuf[j] != 0;j++);
p->lineTo(j-1+txMin,y);
p->lineTo(j-1+txMin,y+1);
p->lineTo(i+txMin,y+1);
p->close();
} else {
j = i+1;
}
}
}
delete[] cbuf;
delete[] tbuf;
return p;
}
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