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//========================================================================
//
// SplashPath.cpp
//
//========================================================================
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
#include <string.h>
#include "gmem.h"
#include "SplashErrorCodes.h"
#include "SplashPath.h"
//------------------------------------------------------------------------
// SplashPath
//------------------------------------------------------------------------
// A path can be in three possible states:
//
// 1. no current point -- zero or more finished subpaths
// [curSubpath == length]
//
// 2. one point in subpath
// [curSubpath == length - 1]
//
// 3. open subpath with two or more points
// [curSubpath < length - 1]
SplashPath::SplashPath() {
pts = NULL;
flags = NULL;
length = size = 0;
curSubpath = 0;
hints = NULL;
hintsLength = hintsSize = 0;
}
SplashPath::SplashPath(SplashPath *path) {
length = path->length;
size = path->size;
pts = (SplashPathPoint *)gmallocn(size, sizeof(SplashPathPoint));
flags = (Guchar *)gmallocn(size, sizeof(Guchar));
memcpy(pts, path->pts, length * sizeof(SplashPathPoint));
memcpy(flags, path->flags, length * sizeof(Guchar));
curSubpath = path->curSubpath;
if (path->hints) {
hintsLength = hintsSize = path->hintsLength;
hints = (SplashPathHint *)gmallocn(hintsSize, sizeof(SplashPathHint));
memcpy(hints, path->hints, hintsLength * sizeof(SplashPathHint));
} else {
hints = NULL;
}
}
SplashPath::~SplashPath() {
gfree(pts);
gfree(flags);
gfree(hints);
}
// Add space for <nPts> more points.
void SplashPath::grow(int nPts) {
if (length + nPts > size) {
if (size == 0) {
size = 32;
}
while (size < length + nPts) {
size *= 2;
}
pts = (SplashPathPoint *)greallocn(pts, size, sizeof(SplashPathPoint));
flags = (Guchar *)greallocn(flags, size, sizeof(Guchar));
}
}
void SplashPath::append(SplashPath *path) {
int i;
curSubpath = length + path->curSubpath;
grow(path->length);
for (i = 0; i < path->length; ++i) {
pts[length] = path->pts[i];
flags[length] = path->flags[i];
++length;
}
}
SplashError SplashPath::moveTo(SplashCoord x, SplashCoord y) {
if (onePointSubpath()) {
return splashErrBogusPath;
}
grow(1);
pts[length].x = x;
pts[length].y = y;
flags[length] = splashPathFirst | splashPathLast;
curSubpath = length++;
return splashOk;
}
SplashError SplashPath::lineTo(SplashCoord x, SplashCoord y) {
if (noCurrentPoint()) {
return splashErrNoCurPt;
}
flags[length-1] &= ~splashPathLast;
grow(1);
pts[length].x = x;
pts[length].y = y;
flags[length] = splashPathLast;
++length;
return splashOk;
}
SplashError SplashPath::curveTo(SplashCoord x1, SplashCoord y1,
SplashCoord x2, SplashCoord y2,
SplashCoord x3, SplashCoord y3) {
if (noCurrentPoint()) {
return splashErrNoCurPt;
}
flags[length-1] &= ~splashPathLast;
grow(3);
pts[length].x = x1;
pts[length].y = y1;
flags[length] = splashPathCurve;
++length;
pts[length].x = x2;
pts[length].y = y2;
flags[length] = splashPathCurve;
++length;
pts[length].x = x3;
pts[length].y = y3;
flags[length] = splashPathLast;
++length;
return splashOk;
}
SplashError SplashPath::close() {
if (noCurrentPoint()) {
return splashErrNoCurPt;
}
if (curSubpath == length - 1 ||
pts[length - 1].x != pts[curSubpath].x ||
pts[length - 1].y != pts[curSubpath].y) {
lineTo(pts[curSubpath].x, pts[curSubpath].y);
}
flags[curSubpath] |= splashPathClosed;
flags[length - 1] |= splashPathClosed;
curSubpath = length;
return splashOk;
}
void SplashPath::addStrokeAdjustHint(int ctrl0, int ctrl1,
int firstPt, int lastPt) {
if (hintsLength == hintsSize) {
hintsSize = hintsLength ? 2 * hintsLength : 8;
hints = (SplashPathHint *)greallocn(hints, hintsSize,
sizeof(SplashPathHint));
}
hints[hintsLength].ctrl0 = ctrl0;
hints[hintsLength].ctrl1 = ctrl1;
hints[hintsLength].firstPt = firstPt;
hints[hintsLength].lastPt = lastPt;
++hintsLength;
}
void SplashPath::offset(SplashCoord dx, SplashCoord dy) {
int i;
for (i = 0; i < length; ++i) {
pts[i].x += dx;
pts[i].y += dy;
}
}
GBool SplashPath::getCurPt(SplashCoord *x, SplashCoord *y) {
if (noCurrentPoint()) {
return gFalse;
}
*x = pts[length - 1].x;
*y = pts[length - 1].y;
return gTrue;
}
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