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-rw-r--r--kpdf/xpdf/splash/SplashClip.cpp382
1 files changed, 382 insertions, 0 deletions
diff --git a/kpdf/xpdf/splash/SplashClip.cpp b/kpdf/xpdf/splash/SplashClip.cpp
new file mode 100644
index 00000000..ba03b7a4
--- /dev/null
+++ b/kpdf/xpdf/splash/SplashClip.cpp
@@ -0,0 +1,382 @@
+//========================================================================
+//
+// SplashClip.cpp
+//
+//========================================================================
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include "gmem.h"
+#include "SplashErrorCodes.h"
+#include "SplashPath.h"
+#include "SplashXPath.h"
+#include "SplashXPathScanner.h"
+#include "SplashBitmap.h"
+#include "SplashClip.h"
+
+//------------------------------------------------------------------------
+// SplashClip.flags
+//------------------------------------------------------------------------
+
+#define splashClipEO 0x01 // use even-odd rule
+
+//------------------------------------------------------------------------
+// SplashClip
+//------------------------------------------------------------------------
+
+SplashClip::SplashClip(SplashCoord x0, SplashCoord y0,
+ SplashCoord x1, SplashCoord y1,
+ GBool antialiasA) {
+ antialias = antialiasA;
+ if (x0 < x1) {
+ xMin = x0;
+ xMax = x1;
+ } else {
+ xMin = x1;
+ xMax = x0;
+ }
+ if (y0 < y1) {
+ yMin = y0;
+ yMax = y1;
+ } else {
+ yMin = y1;
+ yMax = y0;
+ }
+ xMinI = splashFloor(xMin);
+ yMinI = splashFloor(yMin);
+ xMaxI = splashFloor(xMax);
+ yMaxI = splashFloor(yMax);
+ paths = NULL;
+ flags = NULL;
+ scanners = NULL;
+ length = size = 0;
+}
+
+SplashClip::SplashClip(SplashClip *clip) {
+ int i;
+
+ antialias = clip->antialias;
+ xMin = clip->xMin;
+ yMin = clip->yMin;
+ xMax = clip->xMax;
+ yMax = clip->yMax;
+ xMinI = clip->xMinI;
+ yMinI = clip->yMinI;
+ xMaxI = clip->xMaxI;
+ yMaxI = clip->yMaxI;
+ length = clip->length;
+ size = clip->size;
+ paths = (SplashXPath **)gmallocn(size, sizeof(SplashXPath *));
+ flags = (Guchar *)gmallocn(size, sizeof(Guchar));
+ scanners = (SplashXPathScanner **)
+ gmallocn(size, sizeof(SplashXPathScanner *));
+ for (i = 0; i < length; ++i) {
+ paths[i] = clip->paths[i]->copy();
+ flags[i] = clip->flags[i];
+ scanners[i] = new SplashXPathScanner(paths[i], flags[i] & splashClipEO);
+ }
+}
+
+SplashClip::~SplashClip() {
+ int i;
+
+ for (i = 0; i < length; ++i) {
+ delete paths[i];
+ delete scanners[i];
+ }
+ gfree(paths);
+ gfree(flags);
+ gfree(scanners);
+}
+
+void SplashClip::grow(int nPaths) {
+ if (length + nPaths > size) {
+ if (size == 0) {
+ size = 32;
+ }
+ while (size < length + nPaths) {
+ size *= 2;
+ }
+ paths = (SplashXPath **)greallocn(paths, size, sizeof(SplashXPath *));
+ flags = (Guchar *)greallocn(flags, size, sizeof(Guchar));
+ scanners = (SplashXPathScanner **)
+ greallocn(scanners, size, sizeof(SplashXPathScanner *));
+ }
+}
+
+void SplashClip::resetToRect(SplashCoord x0, SplashCoord y0,
+ SplashCoord x1, SplashCoord y1) {
+ int i;
+
+ for (i = 0; i < length; ++i) {
+ delete paths[i];
+ delete scanners[i];
+ }
+ gfree(paths);
+ gfree(flags);
+ gfree(scanners);
+ paths = NULL;
+ flags = NULL;
+ scanners = NULL;
+ length = size = 0;
+
+ if (x0 < x1) {
+ xMin = x0;
+ xMax = x1;
+ } else {
+ xMin = x1;
+ xMax = x0;
+ }
+ if (y0 < y1) {
+ yMin = y0;
+ yMax = y1;
+ } else {
+ yMin = y1;
+ yMax = y0;
+ }
+ xMinI = splashFloor(xMin);
+ yMinI = splashFloor(yMin);
+ xMaxI = splashFloor(xMax);
+ yMaxI = splashFloor(yMax);
+}
+
+SplashError SplashClip::clipToRect(SplashCoord x0, SplashCoord y0,
+ SplashCoord x1, SplashCoord y1) {
+ if (x0 < x1) {
+ if (x0 > xMin) {
+ xMin = x0;
+ xMinI = splashFloor(xMin);
+ }
+ if (x1 < xMax) {
+ xMax = x1;
+ xMaxI = splashFloor(xMax);
+ }
+ } else {
+ if (x1 > xMin) {
+ xMin = x1;
+ xMinI = splashFloor(xMin);
+ }
+ if (x0 < xMax) {
+ xMax = x0;
+ xMaxI = splashFloor(xMax);
+ }
+ }
+ if (y0 < y1) {
+ if (y0 > yMin) {
+ yMin = y0;
+ yMinI = splashFloor(yMin);
+ }
+ if (y1 < yMax) {
+ yMax = y1;
+ yMaxI = splashFloor(yMax);
+ }
+ } else {
+ if (y1 > yMin) {
+ yMin = y1;
+ yMinI = splashFloor(yMin);
+ }
+ if (y0 < yMax) {
+ yMax = y0;
+ yMaxI = splashFloor(yMax);
+ }
+ }
+ return splashOk;
+}
+
+SplashError SplashClip::clipToPath(SplashPath *path, SplashCoord *matrix,
+ SplashCoord flatness, GBool eo) {
+ SplashXPath *xPath;
+
+ xPath = new SplashXPath(path, matrix, flatness, gTrue);
+
+ // check for an empty path
+ if (xPath->length == 0) {
+ xMax = xMin - 1;
+ yMax = yMin - 1;
+ xMaxI = splashFloor(xMax);
+ yMaxI = splashFloor(yMax);
+ delete xPath;
+
+ // check for a rectangle
+ } else if (xPath->length == 4 &&
+ ((xPath->segs[0].x0 == xPath->segs[0].x1 &&
+ xPath->segs[0].x0 == xPath->segs[1].x0 &&
+ xPath->segs[0].x0 == xPath->segs[3].x1 &&
+ xPath->segs[2].x0 == xPath->segs[2].x1 &&
+ xPath->segs[2].x0 == xPath->segs[1].x1 &&
+ xPath->segs[2].x0 == xPath->segs[3].x0 &&
+ xPath->segs[1].y0 == xPath->segs[1].y1 &&
+ xPath->segs[1].y0 == xPath->segs[0].y1 &&
+ xPath->segs[1].y0 == xPath->segs[2].y0 &&
+ xPath->segs[3].y0 == xPath->segs[3].y1 &&
+ xPath->segs[3].y0 == xPath->segs[0].y0 &&
+ xPath->segs[3].y0 == xPath->segs[2].y1) ||
+ (xPath->segs[0].y0 == xPath->segs[0].y1 &&
+ xPath->segs[0].y0 == xPath->segs[1].y0 &&
+ xPath->segs[0].y0 == xPath->segs[3].y1 &&
+ xPath->segs[2].y0 == xPath->segs[2].y1 &&
+ xPath->segs[2].y0 == xPath->segs[1].y1 &&
+ xPath->segs[2].y0 == xPath->segs[3].y0 &&
+ xPath->segs[1].x0 == xPath->segs[1].x1 &&
+ xPath->segs[1].x0 == xPath->segs[0].x1 &&
+ xPath->segs[1].x0 == xPath->segs[2].x0 &&
+ xPath->segs[3].x0 == xPath->segs[3].x1 &&
+ xPath->segs[3].x0 == xPath->segs[0].x0 &&
+ xPath->segs[3].x0 == xPath->segs[2].x1))) {
+ clipToRect(xPath->segs[0].x0, xPath->segs[0].y0,
+ xPath->segs[2].x0, xPath->segs[2].y0);
+ delete xPath;
+
+ } else {
+ grow(1);
+ if (antialias) {
+ xPath->aaScale();
+ }
+ xPath->sort();
+ paths[length] = xPath;
+ flags[length] = eo ? splashClipEO : 0;
+ scanners[length] = new SplashXPathScanner(xPath, eo);
+ ++length;
+ }
+
+ return splashOk;
+}
+
+GBool SplashClip::test(int x, int y) {
+ int i;
+
+ // check the rectangle
+ if (x < xMinI || x > xMaxI || y < yMinI || y > yMaxI) {
+ return gFalse;
+ }
+
+ // check the paths
+ if (antialias) {
+ for (i = 0; i < length; ++i) {
+ if (!scanners[i]->test(x * splashAASize, y * splashAASize)) {
+ return gFalse;
+ }
+ }
+ } else {
+ for (i = 0; i < length; ++i) {
+ if (!scanners[i]->test(x, y)) {
+ return gFalse;
+ }
+ }
+ }
+
+ return gTrue;
+}
+
+SplashClipResult SplashClip::testRect(int rectXMin, int rectYMin,
+ int rectXMax, int rectYMax) {
+ // This tests the rectangle:
+ // x = [rectXMin, rectXMax + 1) (note: rect coords are ints)
+ // y = [rectYMin, rectYMax + 1)
+ // against the clipping region:
+ // x = [xMin, xMax] (note: clipping coords are fp)
+ // y = [yMin, yMax]
+ if ((SplashCoord)(rectXMax + 1) <= xMin || (SplashCoord)rectXMin > xMax ||
+ (SplashCoord)(rectYMax + 1) <= yMin || (SplashCoord)rectYMin > yMax) {
+ return splashClipAllOutside;
+ }
+ if ((SplashCoord)rectXMin >= xMin && (SplashCoord)(rectXMax + 1) <= xMax &&
+ (SplashCoord)rectYMin >= yMin && (SplashCoord)(rectYMax + 1) <= yMax &&
+ length == 0) {
+ return splashClipAllInside;
+ }
+ return splashClipPartial;
+}
+
+SplashClipResult SplashClip::testSpan(int spanXMin, int spanXMax, int spanY) {
+ int i;
+
+ // This tests the rectangle:
+ // x = [spanXMin, spanXMax + 1) (note: span coords are ints)
+ // y = [spanY, spanY + 1)
+ // against the clipping region:
+ // x = [xMin, xMax] (note: clipping coords are fp)
+ // y = [yMin, yMax]
+ if ((SplashCoord)(spanXMax + 1) <= xMin || (SplashCoord)spanXMin > xMax ||
+ (SplashCoord)(spanY + 1) <= yMin || (SplashCoord)spanY > yMax) {
+ return splashClipAllOutside;
+ }
+ if (!((SplashCoord)spanXMin >= xMin && (SplashCoord)(spanXMax + 1) <= xMax &&
+ (SplashCoord)spanY >= yMin && (SplashCoord)(spanY + 1) <= yMax)) {
+ return splashClipPartial;
+ }
+ if (antialias) {
+ for (i = 0; i < length; ++i) {
+ if (!scanners[i]->testSpan(spanXMin * splashAASize,
+ spanXMax * splashAASize + (splashAASize - 1),
+ spanY * splashAASize)) {
+ return splashClipPartial;
+ }
+ }
+ } else {
+ for (i = 0; i < length; ++i) {
+ if (!scanners[i]->testSpan(spanXMin, spanXMax, spanY)) {
+ return splashClipPartial;
+ }
+ }
+ }
+ return splashClipAllInside;
+}
+
+void SplashClip::clipAALine(SplashBitmap *aaBuf, int *x0, int *x1, int y) {
+ int xx0, xx1, xx, yy, i;
+ SplashColorPtr p;
+
+ // zero out pixels with x < xMin
+ xx0 = *x0 * splashAASize;
+ xx1 = splashFloor(xMin * splashAASize);
+ if (xx1 > aaBuf->getWidth()) {
+ xx1 = aaBuf->getWidth();
+ }
+ if (xx0 < xx1) {
+ xx0 &= ~7;
+ for (yy = 0; yy < splashAASize; ++yy) {
+ p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() + (xx0 >> 3);
+ for (xx = xx0; xx + 7 < xx1; xx += 8) {
+ *p++ = 0;
+ }
+ if (xx < xx1) {
+ *p &= 0xff >> (xx1 & 7);
+ }
+ }
+ *x0 = splashFloor(xMin);
+ }
+
+ // zero out pixels with x > xMax
+ xx0 = splashFloor(xMax * splashAASize) + 1;
+ if (xx0 < 0) {
+ xx0 = 0;
+ }
+ xx1 = (*x1 + 1) * splashAASize;
+ if (xx0 < xx1) {
+ for (yy = 0; yy < splashAASize; ++yy) {
+ p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() + (xx0 >> 3);
+ xx = xx0;
+ if (xx & 7) {
+ *p &= 0xff00 >> (xx & 7);
+ xx = (xx & ~7) + 8;
+ ++p;
+ }
+ for (; xx < xx1; xx += 8) {
+ *p++ = 0;
+ }
+ }
+ *x1 = splashFloor(xMax);
+ }
+
+ // check the paths
+ for (i = 0; i < length; ++i) {
+ scanners[i]->clipAALine(aaBuf, x0, x1, y);
+ }
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-29 03:19:11 +0000