1 files changed, 91 insertions, 0 deletions
diff --git a/filter/pdftoopvp/oprs/OPVPSplashClip.cxx b/filter/pdftoopvp/oprs/OPVPSplashClip.cxx
new file mode 100644
index 000000000..c9d2e834c
--- /dev/null
+++ b/filter/pdftoopvp/oprs/OPVPSplashClip.cxx
@@ -0,0 +1,91 @@
+#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;
+}