//
// Gfx.cc
//
-// Copyright 1996-2002 Glyph & Cog, LLC
+// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================
-#ifdef __GNUC__
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
-#include <aconf.h>
+#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <string.h>
#include <math.h>
#include "gmem.h"
+#include "GlobalParams.h"
#include "CharTypes.h"
#include "Object.h"
#include "Array.h"
// constants
//------------------------------------------------------------------------
+// Max recursive depth for a function shading fill.
+#define functionMaxDepth 6
+
+// Max delta allowed in any color component for a function shading fill.
+#define functionColorDelta (dblToCol(1 / 256.0))
+
// Max number of splits along the t axis for an axial shading fill.
#define axialMaxSplits 256
// Max delta allowed in any color component for an axial shading fill.
-#define axialColorDelta (1 / 256.0)
+#define axialColorDelta (dblToCol(1 / 256.0))
// Max number of splits along the t axis for a radial shading fill.
#define radialMaxSplits 256
// Max delta allowed in any color component for a radial shading fill.
-#define radialColorDelta (1 / 256.0)
+#define radialColorDelta (dblToCol(1 / 256.0))
+
+// Max recursive depth for a Gouraud triangle shading fill.
+#define gouraudMaxDepth 4
+
+// Max delta allowed in any color component for a Gouraud triangle
+// shading fill.
+#define gouraudColorDelta (dblToCol(1 / 256.0))
+
+// Max recursive depth for a patch mesh shading fill.
+#define patchMaxDepth 6
+
+// Max delta allowed in any color component for a patch mesh shading
+// fill.
+#define patchColorDelta (dblToCol(1 / 256.0))
//------------------------------------------------------------------------
// Operator table
//------------------------------------------------------------------------
+#ifdef WIN32 // this works around a bug in the VC7 compiler
+# pragma optimize("",off)
+#endif
+
Operator Gfx::opTab[] = {
{"\"", 3, {tchkNum, tchkNum, tchkString},
&Gfx::opMoveSetShowText},
&Gfx::opCurveTo2},
};
+#ifdef WIN32 // this works around a bug in the VC7 compiler
+# pragma optimize("",on)
+#endif
+
#define numOps (sizeof(opTab) / sizeof(Operator))
//------------------------------------------------------------------------
//------------------------------------------------------------------------
GfxResources::GfxResources(XRef *xref, Dict *resDict, GfxResources *nextA) {
- Object obj1;
+ Object obj1, obj2;
+ Ref r;
if (resDict) {
// build font dictionary
fonts = NULL;
- resDict->lookup("Font", &obj1);
- if (obj1.isDict()) {
- fonts = new GfxFontDict(xref, obj1.getDict());
+ resDict->lookupNF("Font", &obj1);
+ if (obj1.isRef()) {
+ obj1.fetch(xref, &obj2);
+ if (obj2.isDict()) {
+ r = obj1.getRef();
+ fonts = new GfxFontDict(xref, &r, obj2.getDict());
+ }
+ obj2.free();
+ } else if (obj1.isDict()) {
+ fonts = new GfxFontDict(xref, NULL, obj1.getDict());
}
obj1.free();
xObjDict.initNull();
colorSpaceDict.initNull();
patternDict.initNull();
+ shadingDict.initNull();
gStateDict.initNull();
}
// Gfx
//------------------------------------------------------------------------
-Gfx::Gfx(XRef *xrefA, OutputDev *outA, int pageNum, Dict *resDict, double dpi,
- PDFRectangle *box, GBool crop, PDFRectangle *cropBox, int rotate,
- GBool printCommandsA) {
+Gfx::Gfx(XRef *xrefA, OutputDev *outA, int pageNum, Dict *resDict,
+ double hDPI, double vDPI, PDFRectangle *box,
+ PDFRectangle *cropBox, int rotate,
+ GBool (*abortCheckCbkA)(void *data),
+ void *abortCheckCbkDataA) {
int i;
xref = xrefA;
subPage = gFalse;
- printCommands = printCommandsA;
+ printCommands = globalParams->getPrintCommands();
// start the resource stack
res = new GfxResources(xref, resDict, NULL);
// initialize
out = outA;
- state = new GfxState(dpi, box, rotate, out->upsideDown());
+ state = new GfxState(hDPI, vDPI, box, rotate, out->upsideDown());
fontChanged = gFalse;
clip = clipNone;
ignoreUndef = 0;
for (i = 0; i < 6; ++i) {
baseMatrix[i] = state->getCTM()[i];
}
+ formDepth = 0;
+ abortCheckCbk = abortCheckCbkA;
+ abortCheckCbkData = abortCheckCbkDataA;
// set crop box
- /*if (crop) {
+ /*if (cropBox) {
state->moveTo(cropBox->x1, cropBox->y1);
state->lineTo(cropBox->x2, cropBox->y1);
state->lineTo(cropBox->x2, cropBox->y2);
}
Gfx::Gfx(XRef *xrefA, OutputDev *outA, Dict *resDict,
- PDFRectangle *box, GBool crop, PDFRectangle *cropBox) {
+ PDFRectangle *box, PDFRectangle *cropBox,
+ GBool (*abortCheckCbkA)(void *data),
+ void *abortCheckCbkDataA) {
int i;
xref = xrefA;
subPage = gTrue;
- printCommands = gFalse;
+ printCommands = globalParams->getPrintCommands();
// start the resource stack
res = new GfxResources(xref, resDict, NULL);
// initialize
out = outA;
- state = new GfxState(72, box, 0, gFalse);
+ state = new GfxState(72, 72, box, 0, gFalse);
fontChanged = gFalse;
clip = clipNone;
ignoreUndef = 0;
for (i = 0; i < 6; ++i) {
baseMatrix[i] = state->getCTM()[i];
}
+ formDepth = 0;
+ abortCheckCbk = abortCheckCbkA;
+ abortCheckCbkData = abortCheckCbkDataA;
// set crop box
- if (crop) {
+ if (cropBox) {
state->moveTo(cropBox->x1, cropBox->y1);
state->lineTo(cropBox->x2, cropBox->y1);
state->lineTo(cropBox->x2, cropBox->y2);
Gfx::~Gfx() {
while (state->hasSaves()) {
- state = state->restore();
- out->restoreState(state);
+ restoreState();
}
if (!subPage) {
out->endPage();
void Gfx::go(GBool topLevel) {
Object obj;
Object args[maxArgs];
- int numArgs;
- int i;
+ int numArgs, i;
+ int lastAbortCheck;
// scan a sequence of objects
- updateLevel = 0;
+ updateLevel = lastAbortCheck = 0;
numArgs = 0;
parser->getObj(&obj);
while (!obj.isEOF()) {
updateLevel = 0;
}
+ // check for an abort
+ if (abortCheckCbk) {
+ if (updateLevel - lastAbortCheck > 10) {
+ if ((*abortCheckCbk)(abortCheckCbkData)) {
+ break;
+ }
+ lastAbortCheck = updateLevel;
+ }
+ }
+
// got an argument - save it
} else if (numArgs < maxArgs) {
args[numArgs++] = obj;
void Gfx::execOp(Object *cmd, Object args[], int numArgs) {
Operator *op;
char *name;
+ Object *argPtr;
int i;
// find operator
- name = cmd->getName();
+ name = cmd->getCmd();
if (!(op = findOp(name))) {
if (ignoreUndef == 0)
error(getPos(), "Unknown operator '%s'", name);
}
// type check args
+ argPtr = args;
if (op->numArgs >= 0) {
- if (numArgs != op->numArgs) {
- error(getPos(), "Wrong number (%d) of args to '%s' operator",
- numArgs, name);
+ if (numArgs < op->numArgs) {
+ error(getPos(), "Too few (%d) args to '%s' operator", numArgs, name);
return;
}
+ if (numArgs > op->numArgs) {
+#if 0
+ error(getPos(), "Too many (%d) args to '%s' operator", numArgs, name);
+#endif
+ argPtr += numArgs - op->numArgs;
+ numArgs = op->numArgs;
+ }
} else {
if (numArgs > -op->numArgs) {
error(getPos(), "Too many (%d) args to '%s' operator",
}
}
for (i = 0; i < numArgs; ++i) {
- if (!checkArg(&args[i], op->tchk[i])) {
+ if (!checkArg(&argPtr[i], op->tchk[i])) {
error(getPos(), "Arg #%d to '%s' operator is wrong type (%s)",
- i, name, args[i].getTypeName());
+ i, name, argPtr[i].getTypeName());
return;
}
}
// do it
- (this->*op->func)(args, numArgs);
+ (this->*op->func)(argPtr, numArgs);
}
Operator *Gfx::findOp(char *name) {
//------------------------------------------------------------------------
void Gfx::opSave(Object args[], int numArgs) {
- out->saveState(state);
- state = state->save();
+ saveState();
}
void Gfx::opRestore(Object args[], int numArgs) {
- state = state->restore();
- out->restoreState(state);
+ restoreState();
}
void Gfx::opConcat(Object args[], int numArgs) {
if (length == 0) {
dash = NULL;
} else {
- dash = (double *)gmalloc(length * sizeof(double));
+ dash = (double *)gmallocn(length, sizeof(double));
for (i = 0; i < length; ++i) {
dash[i] = a->get(i, &obj)->getNum();
obj.free();
void Gfx::opSetExtGState(Object args[], int numArgs) {
Object obj1, obj2;
+ GfxBlendMode mode;
+ GBool haveFillOP;
if (!res->lookupGState(args[0].getName(), &obj1)) {
return;
obj1.free();
return;
}
+
+ // transparency support: blend mode, fill/stroke opacity
+ if (!obj1.dictLookup("BM", &obj2)->isNull()) {
+ if (state->parseBlendMode(&obj2, &mode)) {
+ state->setBlendMode(mode);
+ out->updateBlendMode(state);
+ } else {
+ error(getPos(), "Invalid blend mode in ExtGState");
+ }
+ }
+ obj2.free();
if (obj1.dictLookup("ca", &obj2)->isNum()) {
state->setFillOpacity(obj2.getNum());
out->updateFillOpacity(state);
out->updateStrokeOpacity(state);
}
obj2.free();
+
+ // fill/stroke overprint
+ if ((haveFillOP = (obj1.dictLookup("op", &obj2)->isBool()))) {
+ state->setFillOverprint(obj2.getBool());
+ out->updateFillOverprint(state);
+ }
+ obj2.free();
+ if (obj1.dictLookup("OP", &obj2)->isBool()) {
+ state->setStrokeOverprint(obj2.getBool());
+ out->updateStrokeOverprint(state);
+ if (!haveFillOP) {
+ state->setFillOverprint(obj2.getBool());
+ out->updateFillOverprint(state);
+ }
+ }
+ obj2.free();
+
obj1.free();
}
state->setFillPattern(NULL);
state->setFillColorSpace(new GfxDeviceGrayColorSpace());
- color.c[0] = args[0].getNum();
+ out->updateFillColorSpace(state);
+ color.c[0] = dblToCol(args[0].getNum());
state->setFillColor(&color);
out->updateFillColor(state);
}
state->setStrokePattern(NULL);
state->setStrokeColorSpace(new GfxDeviceGrayColorSpace());
- color.c[0] = args[0].getNum();
+ out->updateStrokeColorSpace(state);
+ color.c[0] = dblToCol(args[0].getNum());
state->setStrokeColor(&color);
out->updateStrokeColor(state);
}
state->setFillPattern(NULL);
state->setFillColorSpace(new GfxDeviceCMYKColorSpace());
+ out->updateFillColorSpace(state);
for (i = 0; i < 4; ++i) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
state->setFillColor(&color);
out->updateFillColor(state);
state->setStrokePattern(NULL);
state->setStrokeColorSpace(new GfxDeviceCMYKColorSpace());
+ out->updateStrokeColorSpace(state);
for (i = 0; i < 4; ++i) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
state->setStrokeColor(&color);
out->updateStrokeColor(state);
state->setFillPattern(NULL);
state->setFillColorSpace(new GfxDeviceRGBColorSpace());
+ out->updateFillColorSpace(state);
for (i = 0; i < 3; ++i) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
state->setFillColor(&color);
out->updateFillColor(state);
state->setStrokePattern(NULL);
state->setStrokeColorSpace(new GfxDeviceRGBColorSpace());
+ out->updateStrokeColorSpace(state);
for (i = 0; i < 3; ++i) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
state->setStrokeColor(&color);
out->updateStrokeColor(state);
obj.free();
if (colorSpace) {
state->setFillColorSpace(colorSpace);
+ out->updateFillColorSpace(state);
} else {
error(getPos(), "Bad color space (fill)");
}
obj.free();
if (colorSpace) {
state->setStrokeColorSpace(colorSpace);
+ out->updateStrokeColorSpace(state);
} else {
error(getPos(), "Bad color space (stroke)");
}
state->setFillPattern(NULL);
for (i = 0; i < numArgs; ++i) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
state->setFillColor(&color);
out->updateFillColor(state);
state->setStrokePattern(NULL);
for (i = 0; i < numArgs; ++i) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
state->setStrokeColor(&color);
out->updateStrokeColor(state);
if (numArgs > 1) {
for (i = 0; i < numArgs && i < 4; ++i) {
if (args[i].isNum()) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
}
state->setFillColor(&color);
state->setFillPattern(NULL);
for (i = 0; i < numArgs && i < 4; ++i) {
if (args[i].isNum()) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
}
state->setFillColor(&color);
if (numArgs > 1) {
for (i = 0; i < numArgs && i < 4; ++i) {
if (args[i].isNum()) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
}
state->setStrokeColor(&color);
state->setStrokePattern(NULL);
for (i = 0; i < numArgs && i < 4; ++i) {
if (args[i].isNum()) {
- color.c[i] = args[i].getNum();
+ color.c[i] = dblToCol(args[i].getNum());
}
}
state->setStrokeColor(&color);
}
void Gfx::doPatternFill(GBool eoFill) {
- GfxPatternColorSpace *patCS;
GfxPattern *pattern;
- GfxTilingPattern *tPat;
- GfxColorSpace *cs;
- double xMin, yMin, xMax, yMax, x, y, x1, y1;
- double cxMin, cyMin, cxMax, cyMax;
- int xi0, yi0, xi1, yi1, xi, yi;
- double *ctm, *btm, *ptm;
- double m[6], ictm[6], m1[6], imb[6];
- double det;
- double xstep, ystep;
- int i;
// this is a bit of a kludge -- patterns can be really slow, so we
// skip them if we're only doing text extraction, since they almost
return;
}
- // get color space
- patCS = (GfxPatternColorSpace *)state->getFillColorSpace();
-
- // get pattern
if (!(pattern = state->getFillPattern())) {
return;
}
- if (pattern->getType() != 1) {
- return;
+ switch (pattern->getType()) {
+ case 1:
+ doTilingPatternFill((GfxTilingPattern *)pattern, eoFill);
+ break;
+ case 2:
+ doShadingPatternFill((GfxShadingPattern *)pattern, eoFill);
+ break;
+ default:
+ error(getPos(), "Unimplemented pattern type (%d) in fill",
+ pattern->getType());
+ break;
}
- tPat = (GfxTilingPattern *)pattern;
+}
+
+void Gfx::doTilingPatternFill(GfxTilingPattern *tPat, GBool eoFill) {
+ GfxPatternColorSpace *patCS;
+ GfxColorSpace *cs;
+ GfxPath *savedPath;
+ double xMin, yMin, xMax, yMax, x, y, x1, y1;
+ double cxMin, cyMin, cxMax, cyMax;
+ int xi0, yi0, xi1, yi1, xi, yi;
+ double *ctm, *btm, *ptm;
+ double m[6], ictm[6], m1[6], imb[6];
+ double det;
+ double xstep, ystep;
+ int i;
+
+ // get color space
+ patCS = (GfxPatternColorSpace *)state->getFillColorSpace();
// construct a (pattern space) -> (current space) transform matrix
ctm = state->getCTM();
m[4] = m1[4] * ictm[0] + m1[5] * ictm[2] + ictm[4];
m[5] = m1[4] * ictm[1] + m1[5] * ictm[3] + ictm[5];
- // construct a (base space) -> (pattern space) transform matrix
+ // construct a (device space) -> (pattern space) transform matrix
det = 1 / (m1[0] * m1[3] - m1[1] * m1[2]);
imb[0] = m1[3] * det;
imb[1] = -m1[1] * det;
imb[5] = (m1[1] * m1[4] - m1[0] * m1[5]) * det;
// save current graphics state
- out->saveState(state);
- state = state->save();
+ savedPath = state->getPath()->copy();
+ saveState();
- // set underlying color space (for uncolored tiling patterns)
+ // set underlying color space (for uncolored tiling patterns); set
+ // various other parameters (stroke color, line width) to match
+ // Adobe's behavior
if (tPat->getPaintType() == 2 && (cs = patCS->getUnder())) {
state->setFillColorSpace(cs->copy());
+ out->updateFillColorSpace(state);
+ state->setStrokeColorSpace(cs->copy());
+ out->updateStrokeColorSpace(state);
+ state->setStrokeColor(state->getFillColor());
} else {
state->setFillColorSpace(new GfxDeviceGrayColorSpace());
+ out->updateFillColorSpace(state);
+ state->setStrokeColorSpace(new GfxDeviceGrayColorSpace());
+ out->updateStrokeColorSpace(state);
}
state->setFillPattern(NULL);
out->updateFillColor(state);
+ state->setStrokePattern(NULL);
+ out->updateStrokeColor(state);
+ state->setLineWidth(0);
+ out->updateLineWidth(state);
// clip to current path
state->clip();
}
state->clearPath();
- // transform clip region bbox to pattern space
+ // get the clip region, check for empty
state->getClipBBox(&cxMin, &cyMin, &cxMax, &cyMax);
+ if (cxMin > cxMax || cyMin > cyMax) {
+ goto err;
+ }
+
+ // transform clip region bbox to pattern space
xMin = xMax = cxMin * imb[0] + cyMin * imb[2] + imb[4];
yMin = yMax = cxMin * imb[1] + cyMin * imb[3] + imb[5];
x1 = cxMin * imb[0] + cyMax * imb[2] + imb[4];
//~ edge instead of left/bottom (?)
xstep = fabs(tPat->getXStep());
ystep = fabs(tPat->getYStep());
- xi0 = (int)floor(xMin / xstep);
- xi1 = (int)ceil(xMax / xstep);
- yi0 = (int)floor(yMin / ystep);
- yi1 = (int)ceil(yMax / ystep);
+ xi0 = (int)floor((xMin - tPat->getBBox()[0]) / xstep);
+ xi1 = (int)ceil((xMax - tPat->getBBox()[0]) / xstep);
+ yi0 = (int)floor((yMin - tPat->getBBox()[1]) / ystep);
+ yi1 = (int)ceil((yMax - tPat->getBBox()[1]) / ystep);
for (i = 0; i < 4; ++i) {
m1[i] = m[i];
}
- for (yi = yi0; yi < yi1; ++yi) {
- for (xi = xi0; xi < xi1; ++xi) {
- x = xi * xstep;
- y = yi * ystep;
- m1[4] = x * m[0] + y * m[2] + m[4];
- m1[5] = x * m[1] + y * m[3] + m[5];
- doForm1(tPat->getContentStream(), tPat->getResDict(),
- m1, tPat->getBBox());
+ if (out->useTilingPatternFill()) {
+ m1[4] = m[4];
+ m1[5] = m[5];
+ out->tilingPatternFill(state, tPat->getContentStream(),
+ tPat->getPaintType(), tPat->getResDict(),
+ m1, tPat->getBBox(),
+ xi0, yi0, xi1, yi1, xstep, ystep);
+ } else {
+ for (yi = yi0; yi < yi1; ++yi) {
+ for (xi = xi0; xi < xi1; ++xi) {
+ x = xi * xstep;
+ y = yi * ystep;
+ m1[4] = x * m[0] + y * m[2] + m[4];
+ m1[5] = x * m[1] + y * m[3] + m[5];
+ doForm1(tPat->getContentStream(), tPat->getResDict(),
+ m1, tPat->getBBox());
+ }
}
}
// restore graphics state
- state = state->restore();
- out->restoreState(state);
+ err:
+ restoreState();
+ state->setPath(savedPath);
+}
+
+void Gfx::doShadingPatternFill(GfxShadingPattern *sPat, GBool eoFill) {
+ GfxShading *shading;
+ GfxPath *savedPath;
+ double *ctm, *btm, *ptm;
+ double m[6], ictm[6], m1[6];
+ double xMin, yMin, xMax, yMax;
+ double det;
+
+ shading = sPat->getShading();
+
+ // save current graphics state
+ savedPath = state->getPath()->copy();
+ saveState();
+
+ // clip to bbox
+ if (shading->getHasBBox()) {
+ shading->getBBox(&xMin, &yMin, &xMax, &yMax);
+ state->moveTo(xMin, yMin);
+ state->lineTo(xMax, yMin);
+ state->lineTo(xMax, yMax);
+ state->lineTo(xMin, yMax);
+ state->closePath();
+ state->clip();
+ out->clip(state);
+ state->setPath(savedPath->copy());
+ }
+
+ // clip to current path
+ state->clip();
+ if (eoFill) {
+ out->eoClip(state);
+ } else {
+ out->clip(state);
+ }
+
+ // set the color space
+ state->setFillColorSpace(shading->getColorSpace()->copy());
+ out->updateFillColorSpace(state);
+
+ // background color fill
+ if (shading->getHasBackground()) {
+ state->setFillColor(shading->getBackground());
+ out->updateFillColor(state);
+ out->fill(state);
+ }
+ state->clearPath();
+
+ // construct a (pattern space) -> (current space) transform matrix
+ ctm = state->getCTM();
+ btm = baseMatrix;
+ ptm = sPat->getMatrix();
+ // iCTM = invert CTM
+ det = 1 / (ctm[0] * ctm[3] - ctm[1] * ctm[2]);
+ ictm[0] = ctm[3] * det;
+ ictm[1] = -ctm[1] * det;
+ ictm[2] = -ctm[2] * det;
+ ictm[3] = ctm[0] * det;
+ ictm[4] = (ctm[2] * ctm[5] - ctm[3] * ctm[4]) * det;
+ ictm[5] = (ctm[1] * ctm[4] - ctm[0] * ctm[5]) * det;
+ // m1 = PTM * BTM = PTM * base transform matrix
+ m1[0] = ptm[0] * btm[0] + ptm[1] * btm[2];
+ m1[1] = ptm[0] * btm[1] + ptm[1] * btm[3];
+ m1[2] = ptm[2] * btm[0] + ptm[3] * btm[2];
+ m1[3] = ptm[2] * btm[1] + ptm[3] * btm[3];
+ m1[4] = ptm[4] * btm[0] + ptm[5] * btm[2] + btm[4];
+ m1[5] = ptm[4] * btm[1] + ptm[5] * btm[3] + btm[5];
+ // m = m1 * iCTM = (PTM * BTM) * (iCTM)
+ m[0] = m1[0] * ictm[0] + m1[1] * ictm[2];
+ m[1] = m1[0] * ictm[1] + m1[1] * ictm[3];
+ m[2] = m1[2] * ictm[0] + m1[3] * ictm[2];
+ m[3] = m1[2] * ictm[1] + m1[3] * ictm[3];
+ m[4] = m1[4] * ictm[0] + m1[5] * ictm[2] + ictm[4];
+ m[5] = m1[4] * ictm[1] + m1[5] * ictm[3] + ictm[5];
+
+ // set the new matrix
+ state->concatCTM(m[0], m[1], m[2], m[3], m[4], m[5]);
+ out->updateCTM(state, m[0], m[1], m[2], m[3], m[4], m[5]);
+
+ // do shading type-specific operations
+ switch (shading->getType()) {
+ case 1:
+ doFunctionShFill((GfxFunctionShading *)shading);
+ break;
+ case 2:
+ doAxialShFill((GfxAxialShading *)shading);
+ break;
+ case 3:
+ doRadialShFill((GfxRadialShading *)shading);
+ break;
+ case 4:
+ case 5:
+ doGouraudTriangleShFill((GfxGouraudTriangleShading *)shading);
+ break;
+ case 6:
+ case 7:
+ doPatchMeshShFill((GfxPatchMeshShading *)shading);
+ break;
+ }
+
+ // restore graphics state
+ restoreState();
+ state->setPath(savedPath);
}
void Gfx::opShFill(Object args[], int numArgs) {
GfxShading *shading;
+ GfxPath *savedPath;
double xMin, yMin, xMax, yMax;
if (!(shading = res->lookupShading(args[0].getName()))) {
}
// save current graphics state
- out->saveState(state);
- state = state->save();
+ savedPath = state->getPath()->copy();
+ saveState();
// clip to bbox
if (shading->getHasBBox()) {
// set the color space
state->setFillColorSpace(shading->getColorSpace()->copy());
+ out->updateFillColorSpace(state);
// do shading type-specific operations
switch (shading->getType()) {
+ case 1:
+ doFunctionShFill((GfxFunctionShading *)shading);
+ break;
case 2:
doAxialShFill((GfxAxialShading *)shading);
break;
case 3:
doRadialShFill((GfxRadialShading *)shading);
break;
+ case 4:
+ case 5:
+ doGouraudTriangleShFill((GfxGouraudTriangleShading *)shading);
+ break;
+ case 6:
+ case 7:
+ doPatchMeshShFill((GfxPatchMeshShading *)shading);
+ break;
}
// restore graphics state
- state = state->restore();
- out->restoreState(state);
+ restoreState();
+ state->setPath(savedPath);
delete shading;
}
+void Gfx::doFunctionShFill(GfxFunctionShading *shading) {
+ double x0, y0, x1, y1;
+ GfxColor colors[4];
+
+ if (out->useShadedFills()) {
+ out->functionShadedFill(state, shading);
+ } else {
+ shading->getDomain(&x0, &y0, &x1, &y1);
+ shading->getColor(x0, y0, &colors[0]);
+ shading->getColor(x0, y1, &colors[1]);
+ shading->getColor(x1, y0, &colors[2]);
+ shading->getColor(x1, y1, &colors[3]);
+ doFunctionShFill1(shading, x0, y0, x1, y1, colors, 0);
+ }
+}
+
+void Gfx::doFunctionShFill1(GfxFunctionShading *shading,
+ double x0, double y0,
+ double x1, double y1,
+ GfxColor *colors, int depth) {
+ GfxColor fillColor;
+ GfxColor color0M, color1M, colorM0, colorM1, colorMM;
+ GfxColor colors2[4];
+ double *matrix;
+ double xM, yM;
+ int nComps, i, j;
+
+ nComps = shading->getColorSpace()->getNComps();
+ matrix = shading->getMatrix();
+
+ // compare the four corner colors
+ for (i = 0; i < 4; ++i) {
+ for (j = 0; j < nComps; ++j) {
+ if (abs(colors[i].c[j] - colors[(i+1)&3].c[j]) > functionColorDelta) {
+ break;
+ }
+ }
+ if (j < nComps) {
+ break;
+ }
+ }
+
+ // center of the rectangle
+ xM = 0.5 * (x0 + x1);
+ yM = 0.5 * (y0 + y1);
+
+ // the four corner colors are close (or we hit the recursive limit)
+ // -- fill the rectangle; but require at least one subdivision
+ // (depth==0) to avoid problems when the four outer corners of the
+ // shaded region are the same color
+ if ((i == 4 && depth > 0) || depth == functionMaxDepth) {
+
+ // use the center color
+ shading->getColor(xM, yM, &fillColor);
+ state->setFillColor(&fillColor);
+ out->updateFillColor(state);
+
+ // fill the rectangle
+ state->moveTo(x0 * matrix[0] + y0 * matrix[2] + matrix[4],
+ x0 * matrix[1] + y0 * matrix[3] + matrix[5]);
+ state->lineTo(x1 * matrix[0] + y0 * matrix[2] + matrix[4],
+ x1 * matrix[1] + y0 * matrix[3] + matrix[5]);
+ state->lineTo(x1 * matrix[0] + y1 * matrix[2] + matrix[4],
+ x1 * matrix[1] + y1 * matrix[3] + matrix[5]);
+ state->lineTo(x0 * matrix[0] + y1 * matrix[2] + matrix[4],
+ x0 * matrix[1] + y1 * matrix[3] + matrix[5]);
+ state->closePath();
+ out->fill(state);
+ state->clearPath();
+
+ // the four corner colors are not close enough -- subdivide the
+ // rectangle
+ } else {
+
+ // colors[0] colorM0 colors[2]
+ // (x0,y0) (xM,y0) (x1,y0)
+ // +----------+----------+
+ // | | |
+ // | UL | UR |
+ // color0M | colorMM | color1M
+ // (x0,yM) +----------+----------+ (x1,yM)
+ // | (xM,yM) |
+ // | LL | LR |
+ // | | |
+ // +----------+----------+
+ // colors[1] colorM1 colors[3]
+ // (x0,y1) (xM,y1) (x1,y1)
+
+ shading->getColor(x0, yM, &color0M);
+ shading->getColor(x1, yM, &color1M);
+ shading->getColor(xM, y0, &colorM0);
+ shading->getColor(xM, y1, &colorM1);
+ shading->getColor(xM, yM, &colorMM);
+
+ // upper-left sub-rectangle
+ colors2[0] = colors[0];
+ colors2[1] = color0M;
+ colors2[2] = colorM0;
+ colors2[3] = colorMM;
+ doFunctionShFill1(shading, x0, y0, xM, yM, colors2, depth + 1);
+
+ // lower-left sub-rectangle
+ colors2[0] = color0M;
+ colors2[1] = colors[1];
+ colors2[2] = colorMM;
+ colors2[3] = colorM1;
+ doFunctionShFill1(shading, x0, yM, xM, y1, colors2, depth + 1);
+
+ // upper-right sub-rectangle
+ colors2[0] = colorM0;
+ colors2[1] = colorMM;
+ colors2[2] = colors[2];
+ colors2[3] = color1M;
+ doFunctionShFill1(shading, xM, y0, x1, yM, colors2, depth + 1);
+
+ // lower-right sub-rectangle
+ colors2[0] = colorMM;
+ colors2[1] = colorM1;
+ colors2[2] = color1M;
+ colors2[3] = colors[3];
+ doFunctionShFill1(shading, xM, yM, x1, y1, colors2, depth + 1);
+ }
+}
+
void Gfx::doAxialShFill(GfxAxialShading *shading) {
double xMin, yMin, xMax, yMax;
double x0, y0, x1, y1;
double dx, dy, mul;
+ GBool dxZero, dyZero;
double tMin, tMax, t, tx, ty;
double s[4], sMin, sMax, tmp;
double ux0, uy0, ux1, uy1, vx0, vy0, vx1, vy1;
int nComps;
int i, j, k, kk;
- // get the clip region bbox
- state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
-
- // compute min and max t values, based on the four corners of the
- // clip region bbox
- shading->getCoords(&x0, &y0, &x1, &y1);
- dx = x1 - x0;
- dy = y1 - y0;
- mul = 1 / (dx * dx + dy * dy);
- tMin = tMax = ((xMin - x0) * dx + (yMin - y0) * dy) * mul;
- t = ((xMin - x0) * dx + (yMax - y0) * dy) * mul;
- if (t < tMin) {
- tMin = t;
- } else if (t > tMax) {
- tMax = t;
- }
- t = ((xMax - x0) * dx + (yMin - y0) * dy) * mul;
- if (t < tMin) {
- tMin = t;
- } else if (t > tMax) {
- tMax = t;
- }
- t = ((xMax - x0) * dx + (yMax - y0) * dy) * mul;
- if (t < tMin) {
- tMin = t;
- } else if (t > tMax) {
- tMax = t;
- }
- if (tMin < 0 && !shading->getExtend0()) {
- tMin = 0;
- }
- if (tMax > 1 && !shading->getExtend1()) {
- tMax = 1;
- }
-
- // get the function domain
- t0 = shading->getDomain0();
- t1 = shading->getDomain1();
-
- // Traverse the t axis and do the shading.
- //
- // For each point (tx, ty) on the t axis, consider a line through
- // that point perpendicular to the t axis:
- //
- // x(s) = tx + s * -dy --> s = (x - tx) / -dy
- // y(s) = ty + s * dx --> s = (y - ty) / dx
- //
- // Then look at the intersection of this line with the bounding box
- // (xMin, yMin, xMax, yMax). In the general case, there are four
- // intersection points:
- //
- // s0 = (xMin - tx) / -dy
- // s1 = (xMax - tx) / -dy
- // s2 = (yMin - ty) / dx
- // s3 = (yMax - ty) / dx
- //
- // and we want the middle two s values.
- //
- // In the case where dx = 0, take s0 and s1; in the case where dy =
- // 0, take s2 and s3.
- //
- // Each filled polygon is bounded by two of these line segments
- // perpdendicular to the t axis.
- //
- // The t axis is bisected into smaller regions until the color
- // difference across a region is small enough, and then the region
- // is painted with a single color.
-
- // set up
- nComps = shading->getColorSpace()->getNComps();
- ta[0] = tMin;
- ta[axialMaxSplits] = tMax;
- next[0] = axialMaxSplits;
-
- // compute the color at t = tMin
- if (tMin < 0) {
- tt = t0;
- } else if (tMin > 1) {
- tt = t1;
- } else {
- tt = t0 + (t1 - t0) * tMin;
- }
- shading->getColor(tt, &color0);
-
- // compute the coordinates of the point on the t axis at t = tMin;
- // then compute the intersection of the perpendicular line with the
- // bounding box
- tx = x0 + tMin * dx;
- ty = y0 + tMin * dy;
- if (dx == 0 && dy == 0) {
- sMin = sMax = 0;
- } if (dx == 0) {
- sMin = (xMin - tx) / -dy;
- sMax = (xMax - tx) / -dy;
- if (sMin > sMax) { tmp = sMin; sMin = sMax; sMax = tmp; }
- } else if (dy == 0) {
- sMin = (yMin - ty) / dx;
- sMax = (yMax - ty) / dx;
- if (sMin > sMax) { tmp = sMin; sMin = sMax; sMax = tmp; }
+ if (out->useShadedFills()) {
+
+ out->axialShadedFill(state, shading);
+
} else {
- s[0] = (yMin - ty) / dx;
- s[1] = (yMax - ty) / dx;
- s[2] = (xMin - tx) / -dy;
- s[3] = (xMax - tx) / -dy;
- for (j = 0; j < 3; ++j) {
- kk = j;
- for (k = j + 1; k < 4; ++k) {
- if (s[k] < s[kk]) {
- kk = k;
- }
- }
- tmp = s[j]; s[j] = s[kk]; s[kk] = tmp;
- }
- sMin = s[1];
- sMax = s[2];
- }
- ux0 = tx - sMin * dy;
- uy0 = ty + sMin * dx;
- vx0 = tx - sMax * dy;
- vy0 = ty + sMax * dx;
-
- i = 0;
- while (i < axialMaxSplits) {
-
- // bisect until color difference is small enough or we hit the
- // bisection limit
- j = next[i];
- while (j > i + 1) {
- if (ta[j] < 0) {
- tt = t0;
- } else if (ta[j] > 1) {
- tt = t1;
- } else {
- tt = t0 + (t1 - t0) * ta[j];
- }
- shading->getColor(tt, &color1);
- for (k = 0; k < nComps; ++k) {
- if (fabs(color1.c[k] - color0.c[k]) > axialColorDelta) {
- break;
- }
- }
- if (k == nComps) {
- break;
- }
- k = (i + j) / 2;
- ta[k] = 0.5 * (ta[i] + ta[j]);
- next[i] = k;
- next[k] = j;
- j = k;
+
+ // get the clip region bbox
+ state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
+
+ // compute min and max t values, based on the four corners of the
+ // clip region bbox
+ shading->getCoords(&x0, &y0, &x1, &y1);
+ dx = x1 - x0;
+ dy = y1 - y0;
+ dxZero = fabs(dx) < 0.001;
+ dyZero = fabs(dy) < 0.001;
+ mul = 1 / (dx * dx + dy * dy);
+ tMin = tMax = ((xMin - x0) * dx + (yMin - y0) * dy) * mul;
+ t = ((xMin - x0) * dx + (yMax - y0) * dy) * mul;
+ if (t < tMin) {
+ tMin = t;
+ } else if (t > tMax) {
+ tMax = t;
+ }
+ t = ((xMax - x0) * dx + (yMin - y0) * dy) * mul;
+ if (t < tMin) {
+ tMin = t;
+ } else if (t > tMax) {
+ tMax = t;
+ }
+ t = ((xMax - x0) * dx + (yMax - y0) * dy) * mul;
+ if (t < tMin) {
+ tMin = t;
+ } else if (t > tMax) {
+ tMax = t;
+ }
+ if (tMin < 0 && !shading->getExtend0()) {
+ tMin = 0;
+ }
+ if (tMax > 1 && !shading->getExtend1()) {
+ tMax = 1;
}
- // use the average of the colors of the two sides of the region
- for (k = 0; k < nComps; ++k) {
- color0.c[k] = 0.5 * (color0.c[k] + color1.c[k]);
+ // get the function domain
+ t0 = shading->getDomain0();
+ t1 = shading->getDomain1();
+
+ // Traverse the t axis and do the shading.
+ //
+ // For each point (tx, ty) on the t axis, consider a line through
+ // that point perpendicular to the t axis:
+ //
+ // x(s) = tx + s * -dy --> s = (x - tx) / -dy
+ // y(s) = ty + s * dx --> s = (y - ty) / dx
+ //
+ // Then look at the intersection of this line with the bounding box
+ // (xMin, yMin, xMax, yMax). In the general case, there are four
+ // intersection points:
+ //
+ // s0 = (xMin - tx) / -dy
+ // s1 = (xMax - tx) / -dy
+ // s2 = (yMin - ty) / dx
+ // s3 = (yMax - ty) / dx
+ //
+ // and we want the middle two s values.
+ //
+ // In the case where dx = 0, take s0 and s1; in the case where dy =
+ // 0, take s2 and s3.
+ //
+ // Each filled polygon is bounded by two of these line segments
+ // perpdendicular to the t axis.
+ //
+ // The t axis is bisected into smaller regions until the color
+ // difference across a region is small enough, and then the region
+ // is painted with a single color.
+
+ // set up: require at least one split to avoid problems when the two
+ // ends of the t axis have the same color
+ nComps = shading->getColorSpace()->getNComps();
+ ta[0] = tMin;
+ next[0] = axialMaxSplits / 2;
+ ta[axialMaxSplits / 2] = 0.5 * (tMin + tMax);
+ next[axialMaxSplits / 2] = axialMaxSplits;
+ ta[axialMaxSplits] = tMax;
+
+ // compute the color at t = tMin
+ if (tMin < 0) {
+ tt = t0;
+ } else if (tMin > 1) {
+ tt = t1;
+ } else {
+ tt = t0 + (t1 - t0) * tMin;
}
+ shading->getColor(tt, &color0);
- // compute the coordinates of the point on the t axis; then
- // compute the intersection of the perpendicular line with the
+ // compute the coordinates of the point on the t axis at t = tMin;
+ // then compute the intersection of the perpendicular line with the
// bounding box
- tx = x0 + ta[j] * dx;
- ty = y0 + ta[j] * dy;
- if (dx == 0 && dy == 0) {
+ tx = x0 + tMin * dx;
+ ty = y0 + tMin * dy;
+ if (dxZero && dyZero) {
sMin = sMax = 0;
- } if (dx == 0) {
+ } if (dxZero) {
sMin = (xMin - tx) / -dy;
sMax = (xMax - tx) / -dy;
if (sMin > sMax) { tmp = sMin; sMin = sMax; sMax = tmp; }
- } else if (dy == 0) {
+ } else if (dyZero) {
sMin = (yMin - ty) / dx;
sMax = (yMax - ty) / dx;
if (sMin > sMax) { tmp = sMin; sMin = sMax; sMax = tmp; }
sMin = s[1];
sMax = s[2];
}
- ux1 = tx - sMin * dy;
- uy1 = ty + sMin * dx;
- vx1 = tx - sMax * dy;
- vy1 = ty + sMax * dx;
+ ux0 = tx - sMin * dy;
+ uy0 = ty + sMin * dx;
+ vx0 = tx - sMax * dy;
+ vy0 = ty + sMax * dx;
+
+ i = 0;
+ while (i < axialMaxSplits) {
+
+ // bisect until color difference is small enough or we hit the
+ // bisection limit
+ j = next[i];
+ while (j > i + 1) {
+ if (ta[j] < 0) {
+ tt = t0;
+ } else if (ta[j] > 1) {
+ tt = t1;
+ } else {
+ tt = t0 + (t1 - t0) * ta[j];
+ }
+ shading->getColor(tt, &color1);
+ for (k = 0; k < nComps; ++k) {
+ if (abs(color1.c[k] - color0.c[k]) > axialColorDelta) {
+ break;
+ }
+ }
+ if (k == nComps) {
+ break;
+ }
+ k = (i + j) / 2;
+ ta[k] = 0.5 * (ta[i] + ta[j]);
+ next[i] = k;
+ next[k] = j;
+ j = k;
+ }
- // set the color
- state->setFillColor(&color0);
- out->updateFillColor(state);
+ // use the average of the colors of the two sides of the region
+ for (k = 0; k < nComps; ++k) {
+ color0.c[k] = (color0.c[k] + color1.c[k]) / 2;
+ }
- // fill the region
- state->moveTo(ux0, uy0);
- state->lineTo(vx0, vy0);
- state->lineTo(vx1, vy1);
- state->lineTo(ux1, uy1);
- state->closePath();
- out->fill(state);
- state->clearPath();
+ // compute the coordinates of the point on the t axis; then
+ // compute the intersection of the perpendicular line with the
+ // bounding box
+ tx = x0 + ta[j] * dx;
+ ty = y0 + ta[j] * dy;
+ if (dxZero && dyZero) {
+ sMin = sMax = 0;
+ } if (dxZero) {
+ sMin = (xMin - tx) / -dy;
+ sMax = (xMax - tx) / -dy;
+ if (sMin > sMax) { tmp = sMin; sMin = sMax; sMax = tmp; }
+ } else if (dyZero) {
+ sMin = (yMin - ty) / dx;
+ sMax = (yMax - ty) / dx;
+ if (sMin > sMax) { tmp = sMin; sMin = sMax; sMax = tmp; }
+ } else {
+ s[0] = (yMin - ty) / dx;
+ s[1] = (yMax - ty) / dx;
+ s[2] = (xMin - tx) / -dy;
+ s[3] = (xMax - tx) / -dy;
+ for (j = 0; j < 3; ++j) {
+ kk = j;
+ for (k = j + 1; k < 4; ++k) {
+ if (s[k] < s[kk]) {
+ kk = k;
+ }
+ }
+ tmp = s[j]; s[j] = s[kk]; s[kk] = tmp;
+ }
+ sMin = s[1];
+ sMax = s[2];
+ }
+ ux1 = tx - sMin * dy;
+ uy1 = ty + sMin * dx;
+ vx1 = tx - sMax * dy;
+ vy1 = ty + sMax * dx;
- // set up for next region
- ux0 = ux1;
- uy0 = uy1;
- vx0 = vx1;
- vy0 = vy1;
- color0 = color1;
- i = next[i];
+ // set the color
+ state->setFillColor(&color0);
+ out->updateFillColor(state);
+
+ // fill the region
+ state->moveTo(ux0, uy0);
+ state->lineTo(vx0, vy0);
+ state->lineTo(vx1, vy1);
+ state->lineTo(ux1, uy1);
+ state->closePath();
+ out->fill(state);
+ state->clearPath();
+
+ // set up for next region
+ ux0 = ux1;
+ uy0 = uy1;
+ vx0 = vx1;
+ vy0 = vy1;
+ color0 = color1;
+ i = next[i];
+ }
}
}
double ta, tb, sa, sb;
int ia, ib, k, n;
double *ctm;
- double angle, t;
+ double angle, t, d0, d1;
- // get the shading info
- shading->getCoords(&x0, &y0, &r0, &x1, &y1, &r1);
- t0 = shading->getDomain0();
- t1 = shading->getDomain1();
- nComps = shading->getColorSpace()->getNComps();
+ if (out->useShadedFills()) {
- // compute the (possibly extended) s range
- sMin = 0;
- sMax = 1;
- if (shading->getExtend0()) {
- if (r0 < r1) {
- // extend the smaller end
- sMin = -r0 / (r1 - r0);
- } else {
- // extend the larger end
- //~ this computes the diagonal of the bounding box -- we should
- //~ really compute the intersection of the moving/expanding
- //~ circles with each of the four corners and look for the max
- //~ radius
- state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
- sMin = (sqrt((xMax - xMin) * (xMax - xMin) +
- (yMax - yMin) * (yMax - yMin)) - r0) / (r1 - r0);
- if (sMin > 0) {
- sMin = 0;
- } else if (sMin < -20) {
- // sanity check
- sMin = -20;
+ out->radialShadedFill(state, shading);
+
+ } else {
+
+ // get the shading info
+ shading->getCoords(&x0, &y0, &r0, &x1, &y1, &r1);
+ t0 = shading->getDomain0();
+ t1 = shading->getDomain1();
+ nComps = shading->getColorSpace()->getNComps();
+
+ // compute the (possibly extended) s range
+ sMin = 0;
+ sMax = 1;
+ if (shading->getExtend0()) {
+ if (r0 < r1) {
+ // extend the smaller end
+ sMin = -r0 / (r1 - r0);
+ } else {
+ // extend the larger end
+ state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
+ d0 = (x0 - xMin) * (x0 - xMin);
+ d1 = (x0 - xMax) * (x0 - xMax);
+ sMin = d0 > d1 ? d0 : d1;
+ d0 = (y0 - yMin) * (y0 - yMin);
+ d1 = (y0 - yMax) * (y0 - yMax);
+ sMin += d0 > d1 ? d0 : d1;
+ sMin = (sqrt(sMin) - r0) / (r1 - r0);
+ if (sMin > 0) {
+ sMin = 0;
+ } else if (sMin < -20) {
+ // sanity check
+ sMin = -20;
+ }
}
}
- }
- if (shading->getExtend1()) {
- if (r1 < r0) {
- // extend the smaller end
- sMax = -r0 / (r1 - r0);
- } else if (r1 > r0) {
- // extend the larger end
- state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
- sMax = (sqrt((xMax - xMin) * (xMax - xMin) +
- (yMax - yMin) * (yMax - yMin)) - r0) / (r1 - r0);
- if (sMax < 1) {
- sMin = 1;
- } else if (sMax > 20) {
- // sanity check
- sMax = 20;
+ if (shading->getExtend1()) {
+ if (r1 < r0) {
+ // extend the smaller end
+ sMax = -r0 / (r1 - r0);
+ } else if (r1 > r0) {
+ // extend the larger end
+ state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax);
+ d0 = (x1 - xMin) * (x1 - xMin);
+ d1 = (x1 - xMax) * (x1 - xMax);
+ sMax = d0 > d1 ? d0 : d1;
+ d0 = (y1 - yMin) * (y1 - yMin);
+ d1 = (y1 - yMax) * (y1 - yMax);
+ sMax += d0 > d1 ? d0 : d1;
+ sMax = (sqrt(sMax) - r0) / (r1 - r0);
+ if (sMax < 1) {
+ sMax = 1;
+ } else if (sMax > 20) {
+ // sanity check
+ sMax = 20;
+ }
}
}
- }
- // compute the number of steps into which circles must be divided to
- // achieve a curve flatness of 0.1 pixel in device space for the
- // largest circle (note that "device space" is 72 dpi when generating
- // PostScript, hence the relatively small 0.1 pixel accuracy)
- ctm = state->getCTM();
- t = fabs(ctm[0]);
- if (fabs(ctm[1]) > t) {
- t = fabs(ctm[1]);
- }
- if (fabs(ctm[2]) > t) {
- t = fabs(ctm[2]);
- }
- if (fabs(ctm[3]) > t) {
- t = fabs(ctm[3]);
- }
- if (r0 > r1) {
- t *= r0;
- } else {
- t *= r1;
- }
- if (t < 1) {
- n = 3;
- } else {
- n = (int)(M_PI / acos(1 - 0.1 / t));
- if (n < 3) {
- n = 3;
- } else if (n > 200) {
- n = 200;
- }
- }
-
- // Traverse the t axis and do the shading.
- //
- // This generates and fills a series of rings. Each ring is defined
- // by two circles:
- // sa, ta, xa, ya, ra, colorA
- // sb, tb, xb, yb, rb, colorB
- //
- // The s/t axis is divided into radialMaxSplits parts; these parts
- // are combined as much as possible while respecting the
- // radialColorDelta parameter.
-
- // setup for the start circle
- ia = 0;
- sa = sMin;
- ta = t0 + sa * (t1 - t0);
- xa = x0 + sa * (x1 - x0);
- ya = y0 + sa * (y1 - y0);
- ra = r0 + sa * (r1 - r0);
- if (ta < t0) {
- shading->getColor(t0, &colorA);
- } else if (ta > t1) {
- shading->getColor(t1, &colorA);
- } else {
- shading->getColor(ta, &colorA);
- }
-
- while (ia < radialMaxSplits) {
-
- // go as far along the t axis (toward t1) as we can, such that the
- // color difference is within the tolerance (radialColorDelta) --
- // this uses bisection (between the current value, t, and t1),
- // limited to radialMaxSplits points along the t axis
- ib = radialMaxSplits;
- sb = sMin + ((double)ib / (double)radialMaxSplits) * (sMax - sMin);
- tb = t0 + sb * (t1 - t0);
- if (tb < t0) {
- shading->getColor(t0, &colorB);
- } else if (tb > t1) {
- shading->getColor(t1, &colorB);
+ // compute the number of steps into which circles must be divided to
+ // achieve a curve flatness of 0.1 pixel in device space for the
+ // largest circle (note that "device space" is 72 dpi when generating
+ // PostScript, hence the relatively small 0.1 pixel accuracy)
+ ctm = state->getCTM();
+ t = fabs(ctm[0]);
+ if (fabs(ctm[1]) > t) {
+ t = fabs(ctm[1]);
+ }
+ if (fabs(ctm[2]) > t) {
+ t = fabs(ctm[2]);
+ }
+ if (fabs(ctm[3]) > t) {
+ t = fabs(ctm[3]);
+ }
+ if (r0 > r1) {
+ t *= r0;
} else {
- shading->getColor(tb, &colorB);
+ t *= r1;
}
- while (ib - ia > 1) {
- for (k = 0; k < nComps; ++k) {
- if (fabs(colorB.c[k] - colorA.c[k]) > radialColorDelta) {
- break;
- }
- }
- if (k == nComps) {
- break;
+ if (t < 1) {
+ n = 3;
+ } else {
+ n = (int)(M_PI / acos(1 - 0.1 / t));
+ if (n < 3) {
+ n = 3;
+ } else if (n > 200) {
+ n = 200;
}
- ib = (ia + ib) / 2;
+ }
+
+ // Traverse the t axis and do the shading.
+ //
+ // This generates and fills a series of rings. Each ring is defined
+ // by two circles:
+ // sa, ta, xa, ya, ra, colorA
+ // sb, tb, xb, yb, rb, colorB
+ //
+ // The s/t axis is divided into radialMaxSplits parts; these parts
+ // are combined as much as possible while respecting the
+ // radialColorDelta parameter.
+
+ // setup for the start circle
+ ia = 0;
+ sa = sMin;
+ ta = t0 + sa * (t1 - t0);
+ xa = x0 + sa * (x1 - x0);
+ ya = y0 + sa * (y1 - y0);
+ ra = r0 + sa * (r1 - r0);
+ if (ta < t0) {
+ shading->getColor(t0, &colorA);
+ } else if (ta > t1) {
+ shading->getColor(t1, &colorA);
+ } else {
+ shading->getColor(ta, &colorA);
+ }
+
+ while (ia < radialMaxSplits) {
+
+ // go as far along the t axis (toward t1) as we can, such that the
+ // color difference is within the tolerance (radialColorDelta) --
+ // this uses bisection (between the current value, t, and t1),
+ // limited to radialMaxSplits points along the t axis; require at
+ // least one split to avoid problems when the innermost and
+ // outermost colors are the same
+ ib = radialMaxSplits;
sb = sMin + ((double)ib / (double)radialMaxSplits) * (sMax - sMin);
tb = t0 + sb * (t1 - t0);
if (tb < t0) {
} else {
shading->getColor(tb, &colorB);
}
- }
+ while (ib - ia > 1) {
+ for (k = 0; k < nComps; ++k) {
+ if (abs(colorB.c[k] - colorA.c[k]) > radialColorDelta) {
+ break;
+ }
+ }
+ if (k == nComps && ib < radialMaxSplits) {
+ break;
+ }
+ ib = (ia + ib) / 2;
+ sb = sMin + ((double)ib / (double)radialMaxSplits) * (sMax - sMin);
+ tb = t0 + sb * (t1 - t0);
+ if (tb < t0) {
+ shading->getColor(t0, &colorB);
+ } else if (tb > t1) {
+ shading->getColor(t1, &colorB);
+ } else {
+ shading->getColor(tb, &colorB);
+ }
+ }
+
+ // compute center and radius of the circle
+ xb = x0 + sb * (x1 - x0);
+ yb = y0 + sb * (y1 - y0);
+ rb = r0 + sb * (r1 - r0);
+
+ // use the average of the colors at the two circles
+ for (k = 0; k < nComps; ++k) {
+ colorA.c[k] = (colorA.c[k] + colorB.c[k]) / 2;
+ }
+ state->setFillColor(&colorA);
+ out->updateFillColor(state);
- // compute center and radius of the circle
- xb = x0 + sb * (x1 - x0);
- yb = y0 + sb * (y1 - y0);
- rb = r0 + sb * (r1 - r0);
+ // construct path for first circle
+ state->moveTo(xa + ra, ya);
+ for (k = 1; k < n; ++k) {
+ angle = ((double)k / (double)n) * 2 * M_PI;
+ state->lineTo(xa + ra * cos(angle), ya + ra * sin(angle));
+ }
+ state->closePath();
+
+ // construct and append path for second circle
+ state->moveTo(xb + rb, yb);
+ for (k = 1; k < n; ++k) {
+ angle = ((double)k / (double)n) * 2 * M_PI;
+ state->lineTo(xb + rb * cos(angle), yb + rb * sin(angle));
+ }
+ state->closePath();
- // use the average of the colors at the two circles
- for (k = 0; k < nComps; ++k) {
- colorA.c[k] = 0.5 * (colorA.c[k] + colorB.c[k]);
+ // fill the ring
+ out->eoFill(state);
+ state->clearPath();
+
+ // step to the next value of t
+ ia = ib;
+ sa = sb;
+ ta = tb;
+ xa = xb;
+ ya = yb;
+ ra = rb;
+ colorA = colorB;
}
- state->setFillColor(&colorA);
- out->updateFillColor(state);
+ }
+}
- // construct path for first circle
- state->moveTo(xa + ra, ya);
- for (k = 1; k < n; ++k) {
- angle = ((double)k / (double)n) * 2 * M_PI;
- state->lineTo(xa + ra * cos(angle), ya + ra * sin(angle));
+void Gfx::doGouraudTriangleShFill(GfxGouraudTriangleShading *shading) {
+ double x0, y0, x1, y1, x2, y2;
+ GfxColor color0, color1, color2;
+ int i;
+
+ for (i = 0; i < shading->getNTriangles(); ++i) {
+ shading->getTriangle(i, &x0, &y0, &color0,
+ &x1, &y1, &color1,
+ &x2, &y2, &color2);
+ gouraudFillTriangle(x0, y0, &color0, x1, y1, &color1, x2, y2, &color2,
+ shading->getColorSpace()->getNComps(), 0);
+ }
+}
+
+void Gfx::gouraudFillTriangle(double x0, double y0, GfxColor *color0,
+ double x1, double y1, GfxColor *color1,
+ double x2, double y2, GfxColor *color2,
+ int nComps, int depth) {
+ double x01, y01, x12, y12, x20, y20;
+ GfxColor color01, color12, color20;
+ int i;
+
+ for (i = 0; i < nComps; ++i) {
+ if (abs(color0->c[i] - color1->c[i]) > gouraudColorDelta ||
+ abs(color1->c[i] - color2->c[i]) > gouraudColorDelta) {
+ break;
}
+ }
+ if (i == nComps || depth == gouraudMaxDepth) {
+ state->setFillColor(color0);
+ out->updateFillColor(state);
+ state->moveTo(x0, y0);
+ state->lineTo(x1, y1);
+ state->lineTo(x2, y2);
state->closePath();
+ out->fill(state);
+ state->clearPath();
+ } else {
+ x01 = 0.5 * (x0 + x1);
+ y01 = 0.5 * (y0 + y1);
+ x12 = 0.5 * (x1 + x2);
+ y12 = 0.5 * (y1 + y2);
+ x20 = 0.5 * (x2 + x0);
+ y20 = 0.5 * (y2 + y0);
+ //~ if the shading has a Function, this should interpolate on the
+ //~ function parameter, not on the color components
+ for (i = 0; i < nComps; ++i) {
+ color01.c[i] = (color0->c[i] + color1->c[i]) / 2;
+ color12.c[i] = (color1->c[i] + color2->c[i]) / 2;
+ color20.c[i] = (color2->c[i] + color0->c[i]) / 2;
+ }
+ gouraudFillTriangle(x0, y0, color0, x01, y01, &color01,
+ x20, y20, &color20, nComps, depth + 1);
+ gouraudFillTriangle(x01, y01, &color01, x1, y1, color1,
+ x12, y12, &color12, nComps, depth + 1);
+ gouraudFillTriangle(x01, y01, &color01, x12, y12, &color12,
+ x20, y20, &color20, nComps, depth + 1);
+ gouraudFillTriangle(x20, y20, &color20, x12, y12, &color12,
+ x2, y2, color2, nComps, depth + 1);
+ }
+}
+
+void Gfx::doPatchMeshShFill(GfxPatchMeshShading *shading) {
+ int start, i;
+
+ if (shading->getNPatches() > 128) {
+ start = 3;
+ } else if (shading->getNPatches() > 64) {
+ start = 2;
+ } else if (shading->getNPatches() > 16) {
+ start = 1;
+ } else {
+ start = 0;
+ }
+ for (i = 0; i < shading->getNPatches(); ++i) {
+ fillPatch(shading->getPatch(i), shading->getColorSpace()->getNComps(),
+ start);
+ }
+}
- // construct and append path for second circle
- state->moveTo(xb + rb, yb);
- for (k = 1; k < n; ++k) {
- angle = ((double)k / (double)n) * 2 * M_PI;
- state->lineTo(xb + rb * cos(angle), yb + rb * sin(angle));
+void Gfx::fillPatch(GfxPatch *patch, int nComps, int depth) {
+ GfxPatch patch00, patch01, patch10, patch11;
+ double xx[4][8], yy[4][8];
+ double xxm, yym;
+ int i;
+
+ for (i = 0; i < nComps; ++i) {
+ if (abs(patch->color[0][0].c[i] - patch->color[0][1].c[i])
+ > patchColorDelta ||
+ abs(patch->color[0][1].c[i] - patch->color[1][1].c[i])
+ > patchColorDelta ||
+ abs(patch->color[1][1].c[i] - patch->color[1][0].c[i])
+ > patchColorDelta ||
+ abs(patch->color[1][0].c[i] - patch->color[0][0].c[i])
+ > patchColorDelta) {
+ break;
}
+ }
+ if (i == nComps || depth == patchMaxDepth) {
+ state->setFillColor(&patch->color[0][0]);
+ out->updateFillColor(state);
+ state->moveTo(patch->x[0][0], patch->y[0][0]);
+ state->curveTo(patch->x[0][1], patch->y[0][1],
+ patch->x[0][2], patch->y[0][2],
+ patch->x[0][3], patch->y[0][3]);
+ state->curveTo(patch->x[1][3], patch->y[1][3],
+ patch->x[2][3], patch->y[2][3],
+ patch->x[3][3], patch->y[3][3]);
+ state->curveTo(patch->x[3][2], patch->y[3][2],
+ patch->x[3][1], patch->y[3][1],
+ patch->x[3][0], patch->y[3][0]);
+ state->curveTo(patch->x[2][0], patch->y[2][0],
+ patch->x[1][0], patch->y[1][0],
+ patch->x[0][0], patch->y[0][0]);
state->closePath();
-
- // fill the ring
- out->eoFill(state);
+ out->fill(state);
state->clearPath();
-
- // step to the next value of t
- ia = ib;
- sa = sb;
- ta = tb;
- xa = xb;
- ya = yb;
- ra = rb;
- colorA = colorB;
+ } else {
+ for (i = 0; i < 4; ++i) {
+ xx[i][0] = patch->x[i][0];
+ yy[i][0] = patch->y[i][0];
+ xx[i][1] = 0.5 * (patch->x[i][0] + patch->x[i][1]);
+ yy[i][1] = 0.5 * (patch->y[i][0] + patch->y[i][1]);
+ xxm = 0.5 * (patch->x[i][1] + patch->x[i][2]);
+ yym = 0.5 * (patch->y[i][1] + patch->y[i][2]);
+ xx[i][6] = 0.5 * (patch->x[i][2] + patch->x[i][3]);
+ yy[i][6] = 0.5 * (patch->y[i][2] + patch->y[i][3]);
+ xx[i][2] = 0.5 * (xx[i][1] + xxm);
+ yy[i][2] = 0.5 * (yy[i][1] + yym);
+ xx[i][5] = 0.5 * (xxm + xx[i][6]);
+ yy[i][5] = 0.5 * (yym + yy[i][6]);
+ xx[i][3] = xx[i][4] = 0.5 * (xx[i][2] + xx[i][5]);
+ yy[i][3] = yy[i][4] = 0.5 * (yy[i][2] + yy[i][5]);
+ xx[i][7] = patch->x[i][3];
+ yy[i][7] = patch->y[i][3];
+ }
+ for (i = 0; i < 4; ++i) {
+ patch00.x[0][i] = xx[0][i];
+ patch00.y[0][i] = yy[0][i];
+ patch00.x[1][i] = 0.5 * (xx[0][i] + xx[1][i]);
+ patch00.y[1][i] = 0.5 * (yy[0][i] + yy[1][i]);
+ xxm = 0.5 * (xx[1][i] + xx[2][i]);
+ yym = 0.5 * (yy[1][i] + yy[2][i]);
+ patch10.x[2][i] = 0.5 * (xx[2][i] + xx[3][i]);
+ patch10.y[2][i] = 0.5 * (yy[2][i] + yy[3][i]);
+ patch00.x[2][i] = 0.5 * (patch00.x[1][i] + xxm);
+ patch00.y[2][i] = 0.5 * (patch00.y[1][i] + yym);
+ patch10.x[1][i] = 0.5 * (xxm + patch10.x[2][i]);
+ patch10.y[1][i] = 0.5 * (yym + patch10.y[2][i]);
+ patch00.x[3][i] = 0.5 * (patch00.x[2][i] + patch10.x[1][i]);
+ patch00.y[3][i] = 0.5 * (patch00.y[2][i] + patch10.y[1][i]);
+ patch10.x[0][i] = patch00.x[3][i];
+ patch10.y[0][i] = patch00.y[3][i];
+ patch10.x[3][i] = xx[3][i];
+ patch10.y[3][i] = yy[3][i];
+ }
+ for (i = 4; i < 8; ++i) {
+ patch01.x[0][i-4] = xx[0][i];
+ patch01.y[0][i-4] = yy[0][i];
+ patch01.x[1][i-4] = 0.5 * (xx[0][i] + xx[1][i]);
+ patch01.y[1][i-4] = 0.5 * (yy[0][i] + yy[1][i]);
+ xxm = 0.5 * (xx[1][i] + xx[2][i]);
+ yym = 0.5 * (yy[1][i] + yy[2][i]);
+ patch11.x[2][i-4] = 0.5 * (xx[2][i] + xx[3][i]);
+ patch11.y[2][i-4] = 0.5 * (yy[2][i] + yy[3][i]);
+ patch01.x[2][i-4] = 0.5 * (patch01.x[1][i-4] + xxm);
+ patch01.y[2][i-4] = 0.5 * (patch01.y[1][i-4] + yym);
+ patch11.x[1][i-4] = 0.5 * (xxm + patch11.x[2][i-4]);
+ patch11.y[1][i-4] = 0.5 * (yym + patch11.y[2][i-4]);
+ patch01.x[3][i-4] = 0.5 * (patch01.x[2][i-4] + patch11.x[1][i-4]);
+ patch01.y[3][i-4] = 0.5 * (patch01.y[2][i-4] + patch11.y[1][i-4]);
+ patch11.x[0][i-4] = patch01.x[3][i-4];
+ patch11.y[0][i-4] = patch01.y[3][i-4];
+ patch11.x[3][i-4] = xx[3][i];
+ patch11.y[3][i-4] = yy[3][i];
+ }
+ //~ if the shading has a Function, this should interpolate on the
+ //~ function parameter, not on the color components
+ for (i = 0; i < nComps; ++i) {
+ patch00.color[0][0].c[i] = patch->color[0][0].c[i];
+ patch00.color[0][1].c[i] = (patch->color[0][0].c[i] +
+ patch->color[0][1].c[i]) / 2;
+ patch01.color[0][0].c[i] = patch00.color[0][1].c[i];
+ patch01.color[0][1].c[i] = patch->color[0][1].c[i];
+ patch01.color[1][1].c[i] = (patch->color[0][1].c[i] +
+ patch->color[1][1].c[i]) / 2;
+ patch11.color[0][1].c[i] = patch01.color[1][1].c[i];
+ patch11.color[1][1].c[i] = patch->color[1][1].c[i];
+ patch11.color[1][0].c[i] = (patch->color[1][1].c[i] +
+ patch->color[1][0].c[i]) / 2;
+ patch10.color[1][1].c[i] = patch11.color[1][0].c[i];
+ patch10.color[1][0].c[i] = patch->color[1][0].c[i];
+ patch10.color[0][0].c[i] = (patch->color[1][0].c[i] +
+ patch->color[0][0].c[i]) / 2;
+ patch00.color[1][0].c[i] = patch10.color[0][0].c[i];
+ patch00.color[1][1].c[i] = (patch00.color[1][0].c[i] +
+ patch01.color[1][1].c[i]) / 2;
+ patch01.color[1][0].c[i] = patch00.color[1][1].c[i];
+ patch11.color[0][0].c[i] = patch00.color[1][1].c[i];
+ patch10.color[0][1].c[i] = patch00.color[1][1].c[i];
+ }
+ fillPatch(&patch00, nComps, depth + 1);
+ fillPatch(&patch10, nComps, depth + 1);
+ fillPatch(&patch01, nComps, depth + 1);
+ fillPatch(&patch11, nComps, depth + 1);
}
}
void Gfx::doEndPath() {
- if (state->isPath() && clip != clipNone) {
+ if (state->isCurPt() && clip != clipNone) {
state->clip();
if (clip == clipNormal) {
out->clip(state);
}
void Gfx::opEndText(Object args[], int numArgs) {
+ out->endTextObject(state);
}
//------------------------------------------------------------------------
error(getPos(), "No font in show");
return;
}
+ if (fontChanged) {
+ out->updateFont(state);
+ fontChanged = gFalse;
+ }
+ out->beginStringOp(state);
doShowText(args[0].getString());
+ out->endStringOp(state);
}
void Gfx::opMoveShowText(Object args[], int numArgs) {
error(getPos(), "No font in move/show");
return;
}
+ if (fontChanged) {
+ out->updateFont(state);
+ fontChanged = gFalse;
+ }
tx = state->getLineX();
ty = state->getLineY() - state->getLeading();
state->textMoveTo(tx, ty);
out->updateTextPos(state);
+ out->beginStringOp(state);
doShowText(args[0].getString());
+ out->endStringOp(state);
}
void Gfx::opMoveSetShowText(Object args[], int numArgs) {
error(getPos(), "No font in move/set/show");
return;
}
+ if (fontChanged) {
+ out->updateFont(state);
+ fontChanged = gFalse;
+ }
state->setWordSpace(args[0].getNum());
state->setCharSpace(args[1].getNum());
tx = state->getLineX();
out->updateWordSpace(state);
out->updateCharSpace(state);
out->updateTextPos(state);
+ out->beginStringOp(state);
doShowText(args[2].getString());
+ out->endStringOp(state);
}
void Gfx::opShowSpaceText(Object args[], int numArgs) {
error(getPos(), "No font in show/space");
return;
}
+ if (fontChanged) {
+ out->updateFont(state);
+ fontChanged = gFalse;
+ }
+ out->beginStringOp(state);
wMode = state->getFont()->getWMode();
a = args[0].getArray();
for (i = 0; i < a->getLength(); ++i) {
a->get(i, &obj);
if (obj.isNum()) {
+ // this uses the absolute value of the font size to match
+ // Acrobat's behavior
if (wMode) {
- state->textShift(0, -obj.getNum() * 0.001 * state->getFontSize());
+ state->textShift(0, -obj.getNum() * 0.001 *
+ fabs(state->getFontSize()));
} else {
- state->textShift(-obj.getNum() * 0.001 * state->getFontSize(), 0);
+ state->textShift(-obj.getNum() * 0.001 *
+ fabs(state->getFontSize()), 0);
}
out->updateTextShift(state, obj.getNum());
} else if (obj.isString()) {
}
obj.free();
}
+ out->endStringOp(state);
}
void Gfx::doShowText(GString *s) {
double riseX, riseY;
CharCode code;
Unicode u[8];
- double x, y, dx, dy, dx2, dy2, curX, curY, tdx, tdy;
+ double x, y, dx, dy, dx2, dy2, curX, curY, tdx, tdy, lineX, lineY;
double originX, originY, tOriginX, tOriginY;
double oldCTM[6], newCTM[6];
double *mat;
char *p;
int len, n, uLen, nChars, nSpaces, i;
- if (fontChanged) {
- out->updateFont(state);
- fontChanged = gFalse;
- }
font = state->getFont();
wMode = font->getWMode();
newCTM[2] = mat[2] * newCTM[0] + mat[3] * newCTM[2];
newCTM[3] = mat[2] * newCTM[1] + mat[3] * newCTM[3];
newCTM[0] *= state->getFontSize();
+ newCTM[1] *= state->getFontSize();
+ newCTM[2] *= state->getFontSize();
newCTM[3] *= state->getFontSize();
newCTM[0] *= state->getHorizScaling();
newCTM[2] *= state->getHorizScaling();
state->textTransformDelta(0, state->getRise(), &riseX, &riseY);
curX = state->getCurX();
curY = state->getCurY();
+ lineX = state->getLineX();
+ lineY = state->getLineY();
oldParser = parser;
p = s->getCString();
len = s->getLength();
dy *= state->getFontSize();
state->textTransformDelta(dx, dy, &tdx, &tdy);
state->transform(curX + riseX, curY + riseY, &x, &y);
- out->saveState(state);
- state = state->save();
+ saveState();
state->setCTM(newCTM[0], newCTM[1], newCTM[2], newCTM[3], x, y);
//~ out->updateCTM(???)
- if (!out->beginType3Char(state, code, u, uLen)) {
+ if (!out->beginType3Char(state, curX + riseX, curY + riseY, tdx, tdy,
+ code, u, uLen)) {
((Gfx8BitFont *)font)->getCharProc(code, &charProc);
if ((resDict = ((Gfx8BitFont *)font)->getResources())) {
pushResources(resDict);
}
charProc.free();
}
- state = state->restore();
- out->restoreState(state);
+ restoreState();
// GfxState::restore() does *not* restore the current position,
- // so we track it here with (curX, curY)
+ // so we deal with it here using (curX, curY) and (lineX, lineY)
curX += tdx;
curY += tdy;
state->moveTo(curX, curY);
+ state->textSetPos(lineX, lineY);
p += n;
len -= n;
}
originY *= state->getFontSize();
state->textTransformDelta(originX, originY, &tOriginX, &tOriginY);
out->drawChar(state, state->getCurX() + riseX, state->getCurY() + riseY,
- tdx, tdy, tOriginX, tOriginY, code, u, uLen);
+ tdx, tdy, tOriginX, tOriginY, code, n, u, uLen);
state->shift(tdx, tdy);
p += n;
len -= n;
#endif
obj1.streamGetDict()->lookup("Subtype", &obj2);
if (obj2.isName("Image")) {
- res->lookupXObjectNF(args[0].getName(), &refObj);
- doImage(&refObj, obj1.getStream(), gFalse);
- refObj.free();
+ if (out->needNonText()) {
+ res->lookupXObjectNF(args[0].getName(), &refObj);
+ doImage(&refObj, obj1.getStream(), gFalse);
+ refObj.free();
+ }
} else if (obj2.isName("Form")) {
doForm(&obj1);
} else if (obj2.isName("PS")) {
}
void Gfx::doImage(Object *ref, Stream *str, GBool inlineImg) {
- Dict *dict;
+ Dict *dict, *maskDict;
int width, height;
- int bits;
+ int bits, maskBits;
+ StreamColorSpaceMode csMode;
GBool mask;
GBool invert;
- GfxColorSpace *colorSpace;
- GfxImageColorMap *colorMap;
- Object maskObj;
- GBool haveMask;
+ GfxColorSpace *colorSpace, *maskColorSpace;
+ GfxImageColorMap *colorMap, *maskColorMap;
+ Object maskObj, smaskObj;
+ GBool haveColorKeyMask, haveExplicitMask, haveSoftMask;
int maskColors[2*gfxColorMaxComps];
+ int maskWidth, maskHeight;
+ GBool maskInvert;
+ Stream *maskStr;
Object obj1, obj2;
int i;
+ // get info from the stream
+ bits = 0;
+ csMode = streamCSNone;
+ str->getImageParams(&bits, &csMode);
+
// get stream dict
dict = str->getDict();
obj1.free();
// bit depth
- dict->lookup("BitsPerComponent", &obj1);
- if (obj1.isNull()) {
+ if (bits == 0) {
+ dict->lookup("BitsPerComponent", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ dict->lookup("BPC", &obj1);
+ }
+ if (obj1.isInt()) {
+ bits = obj1.getInt();
+ } else if (mask) {
+ bits = 1;
+ } else {
+ goto err2;
+ }
obj1.free();
- dict->lookup("BPC", &obj1);
}
- if (!obj1.isInt())
- goto err2;
- bits = obj1.getInt();
- obj1.free();
// display a mask
if (mask) {
obj2.free();
}
}
- colorSpace = GfxColorSpace::parse(&obj1);
+ if (!obj1.isNull()) {
+ colorSpace = GfxColorSpace::parse(&obj1);
+ } else if (csMode == streamCSDeviceGray) {
+ colorSpace = new GfxDeviceGrayColorSpace();
+ } else if (csMode == streamCSDeviceRGB) {
+ colorSpace = new GfxDeviceRGBColorSpace();
+ } else if (csMode == streamCSDeviceCMYK) {
+ colorSpace = new GfxDeviceCMYKColorSpace();
+ } else {
+ colorSpace = NULL;
+ }
obj1.free();
if (!colorSpace) {
goto err1;
}
// get the mask
- haveMask = gFalse;
+ haveColorKeyMask = haveExplicitMask = haveSoftMask = gFalse;
+ maskStr = NULL; // make gcc happy
+ maskWidth = maskHeight = 0; // make gcc happy
+ maskInvert = gFalse; // make gcc happy
+ maskColorMap = NULL; // make gcc happy
dict->lookup("Mask", &maskObj);
- if (maskObj.isArray()) {
- for (i = 0; i < maskObj.arrayGetLength(); ++i) {
+ dict->lookup("SMask", &smaskObj);
+ if (smaskObj.isStream()) {
+ // soft mask
+ if (inlineImg) {
+ goto err1;
+ }
+ maskStr = smaskObj.getStream();
+ maskDict = smaskObj.streamGetDict();
+ maskDict->lookup("Width", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("W", &obj1);
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskWidth = obj1.getInt();
+ obj1.free();
+ maskDict->lookup("Height", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("H", &obj1);
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskHeight = obj1.getInt();
+ obj1.free();
+ maskDict->lookup("BitsPerComponent", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("BPC", &obj1);
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskBits = obj1.getInt();
+ obj1.free();
+ maskDict->lookup("ColorSpace", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("CS", &obj1);
+ }
+ if (obj1.isName()) {
+ res->lookupColorSpace(obj1.getName(), &obj2);
+ if (!obj2.isNull()) {
+ obj1.free();
+ obj1 = obj2;
+ } else {
+ obj2.free();
+ }
+ }
+ maskColorSpace = GfxColorSpace::parse(&obj1);
+ obj1.free();
+ if (!maskColorSpace || maskColorSpace->getMode() != csDeviceGray) {
+ goto err1;
+ }
+ maskDict->lookup("Decode", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("D", &obj1);
+ }
+ maskColorMap = new GfxImageColorMap(maskBits, &obj1, maskColorSpace);
+ obj1.free();
+ if (!maskColorMap->isOk()) {
+ delete maskColorMap;
+ goto err1;
+ }
+ //~ handle the Matte entry
+ haveSoftMask = gTrue;
+ } else if (maskObj.isArray()) {
+ // color key mask
+ for (i = 0;
+ i < maskObj.arrayGetLength() && i < 2*gfxColorMaxComps;
+ ++i) {
maskObj.arrayGet(i, &obj1);
maskColors[i] = obj1.getInt();
obj1.free();
}
- haveMask = gTrue;
+ haveColorKeyMask = gTrue;
+ } else if (maskObj.isStream()) {
+ // explicit mask
+ if (inlineImg) {
+ goto err1;
+ }
+ maskStr = maskObj.getStream();
+ maskDict = maskObj.streamGetDict();
+ maskDict->lookup("Width", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("W", &obj1);
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskWidth = obj1.getInt();
+ obj1.free();
+ maskDict->lookup("Height", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("H", &obj1);
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskHeight = obj1.getInt();
+ obj1.free();
+ maskDict->lookup("ImageMask", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("IM", &obj1);
+ }
+ if (!obj1.isBool() || !obj1.getBool()) {
+ goto err2;
+ }
+ obj1.free();
+ maskInvert = gFalse;
+ maskDict->lookup("Decode", &obj1);
+ if (obj1.isNull()) {
+ obj1.free();
+ maskDict->lookup("D", &obj1);
+ }
+ if (obj1.isArray()) {
+ obj1.arrayGet(0, &obj2);
+ if (obj2.isInt() && obj2.getInt() == 1) {
+ maskInvert = gTrue;
+ }
+ obj2.free();
+ } else if (!obj1.isNull()) {
+ goto err2;
+ }
+ obj1.free();
+ haveExplicitMask = gTrue;
}
// draw it
- out->drawImage(state, ref, str, width, height, colorMap,
- haveMask ? maskColors : (int *)NULL, inlineImg);
+ if (haveSoftMask) {
+ out->drawSoftMaskedImage(state, ref, str, width, height, colorMap,
+ maskStr, maskWidth, maskHeight, maskColorMap);
+ delete maskColorMap;
+ } else if (haveExplicitMask) {
+ out->drawMaskedImage(state, ref, str, width, height, colorMap,
+ maskStr, maskWidth, maskHeight, maskInvert);
+ } else {
+ out->drawImage(state, ref, str, width, height, colorMap,
+ haveColorKeyMask ? maskColors : (int *)NULL, inlineImg);
+ }
delete colorMap;
maskObj.free();
+ smaskObj.free();
}
if ((i = width * height) > 1000) {
Object obj1;
int i;
+ // check for excessive recursion
+ if (formDepth > 20) {
+ return;
+ }
+
// get stream dict
dict = str->streamGetDict();
// check form type
dict->lookup("FormType", &obj1);
- if (!(obj1.isInt() && obj1.getInt() == 1)) {
+ if (!(obj1.isNull() || (obj1.isInt() && obj1.getInt() == 1))) {
error(getPos(), "Unknown form type");
}
obj1.free();
resDict = resObj.isDict() ? resObj.getDict() : (Dict *)NULL;
// draw it
+ ++formDepth;
doForm1(str, resDict, m, bbox);
+ --formDepth;
resObj.free();
}
pushResources(resDict);
// save current graphics state
- out->saveState(state);
- state = state->save();
+ saveState();
+
+ // kill any pre-existing path
+ state->clearPath();
// save current parser
oldParser = parser;
parser = oldParser;
// restore graphics state
- state = state->restore();
- out->restoreState(state);
+ restoreState();
// pop resource stack
popResources();
return;
}
-void Gfx::pushResources(Dict *resDict) {
- res = new GfxResources(xref, resDict, res);
-}
-
-void Gfx::popResources() {
- GfxResources *resPtr;
-
- resPtr = res->getNext();
- delete res;
- res = resPtr;
-}
-
//------------------------------------------------------------------------
// in-line image operators
//------------------------------------------------------------------------
obj.free();
// make stream
- str = new EmbedStream(parser->getStream(), &dict);
+ str = new EmbedStream(parser->getStream(), &dict, gFalse, 0);
str = str->addFilters(&dict);
return str;
fflush(stdout);
}
}
+
+//------------------------------------------------------------------------
+// misc
+//------------------------------------------------------------------------
+
+void Gfx::saveState() {
+ out->saveState(state);
+ state = state->save();
+}
+
+void Gfx::restoreState() {
+ state = state->restore();
+ out->restoreState(state);
+}
+
+void Gfx::pushResources(Dict *resDict) {
+ res = new GfxResources(xref, resDict, res);
+}
+
+void Gfx::popResources() {
+ GfxResources *resPtr;
+
+ resPtr = res->getNext();
+ delete res;
+ res = resPtr;
+}
git.asbjorn.biz / swftools.git / blobdiff