//======================================================================== // // Gfx.cc // // Copyright 1996-2003 Glyph & Cog, LLC // //======================================================================== #include #ifdef USE_GCC_PRAGMAS #pragma implementation #endif #include #include #include #include #include "gmem.h" #include "GlobalParams.h" #include "CharTypes.h" #include "Object.h" #include "Array.h" #include "Dict.h" #include "Stream.h" #include "Lexer.h" #include "Parser.h" #include "GfxFont.h" #include "GfxState.h" #include "OutputDev.h" #include "Page.h" #include "Error.h" #include "Gfx.h" // the MSVC math.h doesn't define this #ifndef M_PI #define M_PI 3.14159265358979323846 #endif //------------------------------------------------------------------------ // 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 (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) // 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) //------------------------------------------------------------------------ // 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}, {"'", 1, {tchkString}, &Gfx::opMoveShowText}, {"B", 0, {tchkNone}, &Gfx::opFillStroke}, {"B*", 0, {tchkNone}, &Gfx::opEOFillStroke}, {"BDC", 2, {tchkName, tchkProps}, &Gfx::opBeginMarkedContent}, {"BI", 0, {tchkNone}, &Gfx::opBeginImage}, {"BMC", 1, {tchkName}, &Gfx::opBeginMarkedContent}, {"BT", 0, {tchkNone}, &Gfx::opBeginText}, {"BX", 0, {tchkNone}, &Gfx::opBeginIgnoreUndef}, {"CS", 1, {tchkName}, &Gfx::opSetStrokeColorSpace}, {"DP", 2, {tchkName, tchkProps}, &Gfx::opMarkPoint}, {"Do", 1, {tchkName}, &Gfx::opXObject}, {"EI", 0, {tchkNone}, &Gfx::opEndImage}, {"EMC", 0, {tchkNone}, &Gfx::opEndMarkedContent}, {"ET", 0, {tchkNone}, &Gfx::opEndText}, {"EX", 0, {tchkNone}, &Gfx::opEndIgnoreUndef}, {"F", 0, {tchkNone}, &Gfx::opFill}, {"G", 1, {tchkNum}, &Gfx::opSetStrokeGray}, {"ID", 0, {tchkNone}, &Gfx::opImageData}, {"J", 1, {tchkInt}, &Gfx::opSetLineCap}, {"K", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opSetStrokeCMYKColor}, {"M", 1, {tchkNum}, &Gfx::opSetMiterLimit}, {"MP", 1, {tchkName}, &Gfx::opMarkPoint}, {"Q", 0, {tchkNone}, &Gfx::opRestore}, {"RG", 3, {tchkNum, tchkNum, tchkNum}, &Gfx::opSetStrokeRGBColor}, {"S", 0, {tchkNone}, &Gfx::opStroke}, {"SC", -4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opSetStrokeColor}, {"SCN", -5, {tchkSCN, tchkSCN, tchkSCN, tchkSCN, tchkSCN}, &Gfx::opSetStrokeColorN}, {"T*", 0, {tchkNone}, &Gfx::opTextNextLine}, {"TD", 2, {tchkNum, tchkNum}, &Gfx::opTextMoveSet}, {"TJ", 1, {tchkArray}, &Gfx::opShowSpaceText}, {"TL", 1, {tchkNum}, &Gfx::opSetTextLeading}, {"Tc", 1, {tchkNum}, &Gfx::opSetCharSpacing}, {"Td", 2, {tchkNum, tchkNum}, &Gfx::opTextMove}, {"Tf", 2, {tchkName, tchkNum}, &Gfx::opSetFont}, {"Tj", 1, {tchkString}, &Gfx::opShowText}, {"Tm", 6, {tchkNum, tchkNum, tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opSetTextMatrix}, {"Tr", 1, {tchkInt}, &Gfx::opSetTextRender}, {"Ts", 1, {tchkNum}, &Gfx::opSetTextRise}, {"Tw", 1, {tchkNum}, &Gfx::opSetWordSpacing}, {"Tz", 1, {tchkNum}, &Gfx::opSetHorizScaling}, {"W", 0, {tchkNone}, &Gfx::opClip}, {"W*", 0, {tchkNone}, &Gfx::opEOClip}, {"b", 0, {tchkNone}, &Gfx::opCloseFillStroke}, {"b*", 0, {tchkNone}, &Gfx::opCloseEOFillStroke}, {"c", 6, {tchkNum, tchkNum, tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opCurveTo}, {"cm", 6, {tchkNum, tchkNum, tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opConcat}, {"cs", 1, {tchkName}, &Gfx::opSetFillColorSpace}, {"d", 2, {tchkArray, tchkNum}, &Gfx::opSetDash}, {"d0", 2, {tchkNum, tchkNum}, &Gfx::opSetCharWidth}, {"d1", 6, {tchkNum, tchkNum, tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opSetCacheDevice}, {"f", 0, {tchkNone}, &Gfx::opFill}, {"f*", 0, {tchkNone}, &Gfx::opEOFill}, {"g", 1, {tchkNum}, &Gfx::opSetFillGray}, {"gs", 1, {tchkName}, &Gfx::opSetExtGState}, {"h", 0, {tchkNone}, &Gfx::opClosePath}, {"i", 1, {tchkNum}, &Gfx::opSetFlat}, {"j", 1, {tchkInt}, &Gfx::opSetLineJoin}, {"k", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opSetFillCMYKColor}, {"l", 2, {tchkNum, tchkNum}, &Gfx::opLineTo}, {"m", 2, {tchkNum, tchkNum}, &Gfx::opMoveTo}, {"n", 0, {tchkNone}, &Gfx::opEndPath}, {"q", 0, {tchkNone}, &Gfx::opSave}, {"re", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opRectangle}, {"rg", 3, {tchkNum, tchkNum, tchkNum}, &Gfx::opSetFillRGBColor}, {"ri", 1, {tchkName}, &Gfx::opSetRenderingIntent}, {"s", 0, {tchkNone}, &Gfx::opCloseStroke}, {"sc", -4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opSetFillColor}, {"scn", -5, {tchkSCN, tchkSCN, tchkSCN, tchkSCN, tchkSCN}, &Gfx::opSetFillColorN}, {"sh", 1, {tchkName}, &Gfx::opShFill}, {"v", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opCurveTo1}, {"w", 1, {tchkNum}, &Gfx::opSetLineWidth}, {"y", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, &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::GfxResources(XRef *xref, Dict *resDict, GfxResources *nextA) { Object obj1, obj2; Ref r; if (resDict) { // build font dictionary fonts = NULL; 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(); // get XObject dictionary resDict->lookup("XObject", &xObjDict); // get color space dictionary resDict->lookup("ColorSpace", &colorSpaceDict); // get pattern dictionary resDict->lookup("Pattern", &patternDict); // get shading dictionary resDict->lookup("Shading", &shadingDict); // get graphics state parameter dictionary resDict->lookup("ExtGState", &gStateDict); } else { fonts = NULL; xObjDict.initNull(); colorSpaceDict.initNull(); patternDict.initNull(); shadingDict.initNull(); gStateDict.initNull(); } next = nextA; } GfxResources::~GfxResources() { if (fonts) { delete fonts; } xObjDict.free(); colorSpaceDict.free(); patternDict.free(); shadingDict.free(); gStateDict.free(); } GfxFont *GfxResources::lookupFont(char *name) { GfxFont *font; GfxResources *resPtr; for (resPtr = this; resPtr; resPtr = resPtr->next) { if (resPtr->fonts) { if ((font = resPtr->fonts->lookup(name))) return font; } } error(-1, "Unknown font tag '%s'", name); return NULL; } GBool GfxResources::lookupXObject(char *name, Object *obj) { GfxResources *resPtr; for (resPtr = this; resPtr; resPtr = resPtr->next) { if (resPtr->xObjDict.isDict()) { if (!resPtr->xObjDict.dictLookup(name, obj)->isNull()) return gTrue; obj->free(); } } error(-1, "XObject '%s' is unknown", name); return gFalse; } GBool GfxResources::lookupXObjectNF(char *name, Object *obj) { GfxResources *resPtr; for (resPtr = this; resPtr; resPtr = resPtr->next) { if (resPtr->xObjDict.isDict()) { if (!resPtr->xObjDict.dictLookupNF(name, obj)->isNull()) return gTrue; obj->free(); } } error(-1, "XObject '%s' is unknown", name); return gFalse; } void GfxResources::lookupColorSpace(char *name, Object *obj) { GfxResources *resPtr; for (resPtr = this; resPtr; resPtr = resPtr->next) { if (resPtr->colorSpaceDict.isDict()) { if (!resPtr->colorSpaceDict.dictLookup(name, obj)->isNull()) { return; } obj->free(); } } obj->initNull(); } GfxPattern *GfxResources::lookupPattern(char *name) { GfxResources *resPtr; GfxPattern *pattern; Object obj; for (resPtr = this; resPtr; resPtr = resPtr->next) { if (resPtr->patternDict.isDict()) { if (!resPtr->patternDict.dictLookup(name, &obj)->isNull()) { pattern = GfxPattern::parse(&obj); obj.free(); return pattern; } obj.free(); } } error(-1, "Unknown pattern '%s'", name); return NULL; } GfxShading *GfxResources::lookupShading(char *name) { GfxResources *resPtr; GfxShading *shading; Object obj; for (resPtr = this; resPtr; resPtr = resPtr->next) { if (resPtr->shadingDict.isDict()) { if (!resPtr->shadingDict.dictLookup(name, &obj)->isNull()) { shading = GfxShading::parse(&obj); obj.free(); return shading; } obj.free(); } } error(-1, "Unknown shading '%s'", name); return NULL; } GBool GfxResources::lookupGState(char *name, Object *obj) { GfxResources *resPtr; for (resPtr = this; resPtr; resPtr = resPtr->next) { if (resPtr->gStateDict.isDict()) { if (!resPtr->gStateDict.dictLookup(name, obj)->isNull()) { return gTrue; } obj->free(); } } error(-1, "ExtGState '%s' is unknown", name); return gFalse; } //------------------------------------------------------------------------ // Gfx //------------------------------------------------------------------------ Gfx::Gfx(XRef *xrefA, OutputDev *outA, int pageNum, Dict *resDict, double hDPI, double vDPI, PDFRectangle *box, GBool crop, PDFRectangle *cropBox, int rotate, GBool (*abortCheckCbkA)(void *data), void *abortCheckCbkDataA) { int i; xref = xrefA; subPage = gFalse; printCommands = globalParams->getPrintCommands(); // start the resource stack res = new GfxResources(xref, resDict, NULL); // initialize out = outA; state = new GfxState(hDPI, vDPI, box, rotate, out->upsideDown()); fontChanged = gFalse; clip = clipNone; ignoreUndef = 0; out->startPage(pageNum, state); out->setDefaultCTM(state->getCTM()); out->updateAll(state); for (i = 0; i < 6; ++i) { baseMatrix[i] = state->getCTM()[i]; } formDepth = 0; abortCheckCbk = abortCheckCbkA; abortCheckCbkData = abortCheckCbkDataA; // set crop box if (crop) { state->moveTo(cropBox->x1, cropBox->y1); state->lineTo(cropBox->x2, cropBox->y1); state->lineTo(cropBox->x2, cropBox->y2); state->lineTo(cropBox->x1, cropBox->y2); state->closePath(); state->clip(); out->clip(state); state->clearPath(); } } Gfx::Gfx(XRef *xrefA, OutputDev *outA, Dict *resDict, PDFRectangle *box, GBool crop, PDFRectangle *cropBox, GBool (*abortCheckCbkA)(void *data), void *abortCheckCbkDataA) { int i; xref = xrefA; subPage = gTrue; printCommands = globalParams->getPrintCommands(); // start the resource stack res = new GfxResources(xref, resDict, NULL); // initialize out = outA; 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) { state->moveTo(cropBox->x1, cropBox->y1); state->lineTo(cropBox->x2, cropBox->y1); state->lineTo(cropBox->x2, cropBox->y2); state->lineTo(cropBox->x1, cropBox->y2); state->closePath(); state->clip(); out->clip(state); state->clearPath(); } } Gfx::~Gfx() { while (state->hasSaves()) { restoreState(); } if (!subPage) { out->endPage(); } while (res) { popResources(); } if (state) { delete state; } } void Gfx::display(Object *obj, GBool topLevel) { Object obj2; int i; if (obj->isArray()) { for (i = 0; i < obj->arrayGetLength(); ++i) { obj->arrayGet(i, &obj2); if (!obj2.isStream()) { error(-1, "Weird page contents"); obj2.free(); return; } obj2.free(); } } else if (!obj->isStream()) { error(-1, "Weird page contents"); return; } parser = new Parser(xref, new Lexer(xref, obj)); go(topLevel); delete parser; parser = NULL; } void Gfx::go(GBool topLevel) { Object obj; Object args[maxArgs]; int numArgs, i; int lastAbortCheck; // scan a sequence of objects updateLevel = lastAbortCheck = 0; numArgs = 0; parser->getObj(&obj); while (!obj.isEOF()) { // got a command - execute it if (obj.isCmd()) { if (printCommands) { obj.print(stdout); for (i = 0; i < numArgs; ++i) { printf(" "); args[i].print(stdout); } printf("\n"); fflush(stdout); } execOp(&obj, args, numArgs); obj.free(); for (i = 0; i < numArgs; ++i) args[i].free(); numArgs = 0; // periodically update display if (++updateLevel >= 20000) { out->dump(); 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; // too many arguments - something is wrong } else { error(getPos(), "Too many args in content stream"); if (printCommands) { printf("throwing away arg: "); obj.print(stdout); printf("\n"); fflush(stdout); } obj.free(); } // grab the next object parser->getObj(&obj); } obj.free(); // args at end with no command if (numArgs > 0) { error(getPos(), "Leftover args in content stream"); if (printCommands) { printf("%d leftovers:", numArgs); for (i = 0; i < numArgs; ++i) { printf(" "); args[i].print(stdout); } printf("\n"); fflush(stdout); } for (i = 0; i < numArgs; ++i) args[i].free(); } // update display if (topLevel && updateLevel > 0) { out->dump(); } } void Gfx::execOp(Object *cmd, Object args[], int numArgs) { Operator *op; char *name; Object *argPtr; int i; // find operator name = cmd->getCmd(); if (!(op = findOp(name))) { if (ignoreUndef == 0) error(getPos(), "Unknown operator '%s'", name); return; } // type check args argPtr = args; if (op->numArgs >= 0) { 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", numArgs, name); return; } } for (i = 0; i < numArgs; ++i) { if (!checkArg(&argPtr[i], op->tchk[i])) { error(getPos(), "Arg #%d to '%s' operator is wrong type (%s)", i, name, argPtr[i].getTypeName()); return; } } // do it (this->*op->func)(argPtr, numArgs); } Operator *Gfx::findOp(char *name) { int a, b, m, cmp; a = -1; b = numOps; // invariant: opTab[a] < name < opTab[b] while (b - a > 1) { m = (a + b) / 2; cmp = strcmp(opTab[m].name, name); if (cmp < 0) a = m; else if (cmp > 0) b = m; else a = b = m; } if (cmp != 0) return NULL; return &opTab[a]; } GBool Gfx::checkArg(Object *arg, TchkType type) { switch (type) { case tchkBool: return arg->isBool(); case tchkInt: return arg->isInt(); case tchkNum: return arg->isNum(); case tchkString: return arg->isString(); case tchkName: return arg->isName(); case tchkArray: return arg->isArray(); case tchkProps: return arg->isDict() || arg->isName(); case tchkSCN: return arg->isNum() || arg->isName(); case tchkNone: return gFalse; } return gFalse; } int Gfx::getPos() { return parser ? parser->getPos() : -1; } //------------------------------------------------------------------------ // graphics state operators //------------------------------------------------------------------------ void Gfx::opSave(Object args[], int numArgs) { saveState(); } void Gfx::opRestore(Object args[], int numArgs) { restoreState(); } void Gfx::opConcat(Object args[], int numArgs) { state->concatCTM(args[0].getNum(), args[1].getNum(), args[2].getNum(), args[3].getNum(), args[4].getNum(), args[5].getNum()); out->updateCTM(state, args[0].getNum(), args[1].getNum(), args[2].getNum(), args[3].getNum(), args[4].getNum(), args[5].getNum()); fontChanged = gTrue; } void Gfx::opSetDash(Object args[], int numArgs) { Array *a; int length; Object obj; double *dash; int i; a = args[0].getArray(); length = a->getLength(); if (length == 0) { dash = NULL; } else { dash = (double *)gmalloc(length * sizeof(double)); for (i = 0; i < length; ++i) { dash[i] = a->get(i, &obj)->getNum(); obj.free(); } } state->setLineDash(dash, length, args[1].getNum()); out->updateLineDash(state); } void Gfx::opSetFlat(Object args[], int numArgs) { state->setFlatness((int)args[0].getNum()); out->updateFlatness(state); } void Gfx::opSetLineJoin(Object args[], int numArgs) { state->setLineJoin(args[0].getInt()); out->updateLineJoin(state); } void Gfx::opSetLineCap(Object args[], int numArgs) { state->setLineCap(args[0].getInt()); out->updateLineCap(state); } void Gfx::opSetMiterLimit(Object args[], int numArgs) { state->setMiterLimit(args[0].getNum()); out->updateMiterLimit(state); } void Gfx::opSetLineWidth(Object args[], int numArgs) { state->setLineWidth(args[0].getNum()); out->updateLineWidth(state); } void Gfx::opSetExtGState(Object args[], int numArgs) { Object obj1, obj2; if (!res->lookupGState(args[0].getName(), &obj1)) { return; } if (!obj1.isDict()) { error(getPos(), "ExtGState '%s' is wrong type", args[0].getName()); obj1.free(); return; } if (obj1.dictLookup("ca", &obj2)->isNum()) { state->setFillOpacity(obj2.getNum()); out->updateFillOpacity(state); } obj2.free(); if (obj1.dictLookup("CA", &obj2)->isNum()) { state->setStrokeOpacity(obj2.getNum()); out->updateStrokeOpacity(state); } obj2.free(); obj1.free(); } void Gfx::opSetRenderingIntent(Object args[], int numArgs) { } //------------------------------------------------------------------------ // color operators //------------------------------------------------------------------------ void Gfx::opSetFillGray(Object args[], int numArgs) { GfxColor color; state->setFillPattern(NULL); state->setFillColorSpace(new GfxDeviceGrayColorSpace()); color.c[0] = args[0].getNum(); state->setFillColor(&color); out->updateFillColor(state); } void Gfx::opSetStrokeGray(Object args[], int numArgs) { GfxColor color; state->setStrokePattern(NULL); state->setStrokeColorSpace(new GfxDeviceGrayColorSpace()); color.c[0] = args[0].getNum(); state->setStrokeColor(&color); out->updateStrokeColor(state); } void Gfx::opSetFillCMYKColor(Object args[], int numArgs) { GfxColor color; int i; state->setFillPattern(NULL); state->setFillColorSpace(new GfxDeviceCMYKColorSpace()); for (i = 0; i < 4; ++i) { color.c[i] = args[i].getNum(); } state->setFillColor(&color); out->updateFillColor(state); } void Gfx::opSetStrokeCMYKColor(Object args[], int numArgs) { GfxColor color; int i; state->setStrokePattern(NULL); state->setStrokeColorSpace(new GfxDeviceCMYKColorSpace()); for (i = 0; i < 4; ++i) { color.c[i] = args[i].getNum(); } state->setStrokeColor(&color); out->updateStrokeColor(state); } void Gfx::opSetFillRGBColor(Object args[], int numArgs) { GfxColor color; int i; state->setFillPattern(NULL); state->setFillColorSpace(new GfxDeviceRGBColorSpace()); for (i = 0; i < 3; ++i) { color.c[i] = args[i].getNum(); } state->setFillColor(&color); out->updateFillColor(state); } void Gfx::opSetStrokeRGBColor(Object args[], int numArgs) { GfxColor color; int i; state->setStrokePattern(NULL); state->setStrokeColorSpace(new GfxDeviceRGBColorSpace()); for (i = 0; i < 3; ++i) { color.c[i] = args[i].getNum(); } state->setStrokeColor(&color); out->updateStrokeColor(state); } void Gfx::opSetFillColorSpace(Object args[], int numArgs) { Object obj; GfxColorSpace *colorSpace; GfxColor color; int i; state->setFillPattern(NULL); res->lookupColorSpace(args[0].getName(), &obj); if (obj.isNull()) { colorSpace = GfxColorSpace::parse(&args[0]); } else { colorSpace = GfxColorSpace::parse(&obj); } obj.free(); if (colorSpace) { state->setFillColorSpace(colorSpace); } else { error(getPos(), "Bad color space (fill)"); } for (i = 0; i < gfxColorMaxComps; ++i) { color.c[i] = 0; } state->setFillColor(&color); out->updateFillColor(state); } void Gfx::opSetStrokeColorSpace(Object args[], int numArgs) { Object obj; GfxColorSpace *colorSpace; GfxColor color; int i; state->setStrokePattern(NULL); res->lookupColorSpace(args[0].getName(), &obj); if (obj.isNull()) { colorSpace = GfxColorSpace::parse(&args[0]); } else { colorSpace = GfxColorSpace::parse(&obj); } obj.free(); if (colorSpace) { state->setStrokeColorSpace(colorSpace); } else { error(getPos(), "Bad color space (stroke)"); } for (i = 0; i < gfxColorMaxComps; ++i) { color.c[i] = 0; } state->setStrokeColor(&color); out->updateStrokeColor(state); } void Gfx::opSetFillColor(Object args[], int numArgs) { GfxColor color; int i; state->setFillPattern(NULL); for (i = 0; i < numArgs; ++i) { color.c[i] = args[i].getNum(); } state->setFillColor(&color); out->updateFillColor(state); } void Gfx::opSetStrokeColor(Object args[], int numArgs) { GfxColor color; int i; state->setStrokePattern(NULL); for (i = 0; i < numArgs; ++i) { color.c[i] = args[i].getNum(); } state->setStrokeColor(&color); out->updateStrokeColor(state); } void Gfx::opSetFillColorN(Object args[], int numArgs) { GfxColor color; GfxPattern *pattern; int i; if (state->getFillColorSpace()->getMode() == csPattern) { if (numArgs > 1) { for (i = 0; i < numArgs && i < 4; ++i) { if (args[i].isNum()) { color.c[i] = args[i].getNum(); } } state->setFillColor(&color); out->updateFillColor(state); } if (args[numArgs-1].isName() && (pattern = res->lookupPattern(args[numArgs-1].getName()))) { state->setFillPattern(pattern); } } else { state->setFillPattern(NULL); for (i = 0; i < numArgs && i < 4; ++i) { if (args[i].isNum()) { color.c[i] = args[i].getNum(); } } state->setFillColor(&color); out->updateFillColor(state); } } void Gfx::opSetStrokeColorN(Object args[], int numArgs) { GfxColor color; GfxPattern *pattern; int i; if (state->getStrokeColorSpace()->getMode() == csPattern) { if (numArgs > 1) { for (i = 0; i < numArgs && i < 4; ++i) { if (args[i].isNum()) { color.c[i] = args[i].getNum(); } } state->setStrokeColor(&color); out->updateStrokeColor(state); } if (args[numArgs-1].isName() && (pattern = res->lookupPattern(args[numArgs-1].getName()))) { state->setStrokePattern(pattern); } } else { state->setStrokePattern(NULL); for (i = 0; i < numArgs && i < 4; ++i) { if (args[i].isNum()) { color.c[i] = args[i].getNum(); } } state->setStrokeColor(&color); out->updateStrokeColor(state); } } //------------------------------------------------------------------------ // path segment operators //------------------------------------------------------------------------ void Gfx::opMoveTo(Object args[], int numArgs) { state->moveTo(args[0].getNum(), args[1].getNum()); } void Gfx::opLineTo(Object args[], int numArgs) { if (!state->isCurPt()) { error(getPos(), "No current point in lineto"); return; } state->lineTo(args[0].getNum(), args[1].getNum()); } void Gfx::opCurveTo(Object args[], int numArgs) { double x1, y1, x2, y2, x3, y3; if (!state->isCurPt()) { error(getPos(), "No current point in curveto"); return; } x1 = args[0].getNum(); y1 = args[1].getNum(); x2 = args[2].getNum(); y2 = args[3].getNum(); x3 = args[4].getNum(); y3 = args[5].getNum(); state->curveTo(x1, y1, x2, y2, x3, y3); } void Gfx::opCurveTo1(Object args[], int numArgs) { double x1, y1, x2, y2, x3, y3; if (!state->isCurPt()) { error(getPos(), "No current point in curveto1"); return; } x1 = state->getCurX(); y1 = state->getCurY(); x2 = args[0].getNum(); y2 = args[1].getNum(); x3 = args[2].getNum(); y3 = args[3].getNum(); state->curveTo(x1, y1, x2, y2, x3, y3); } void Gfx::opCurveTo2(Object args[], int numArgs) { double x1, y1, x2, y2, x3, y3; if (!state->isCurPt()) { error(getPos(), "No current point in curveto2"); return; } x1 = args[0].getNum(); y1 = args[1].getNum(); x2 = args[2].getNum(); y2 = args[3].getNum(); x3 = x2; y3 = y2; state->curveTo(x1, y1, x2, y2, x3, y3); } void Gfx::opRectangle(Object args[], int numArgs) { double x, y, w, h; x = args[0].getNum(); y = args[1].getNum(); w = args[2].getNum(); h = args[3].getNum(); state->moveTo(x, y); state->lineTo(x + w, y); state->lineTo(x + w, y + h); state->lineTo(x, y + h); state->closePath(); } void Gfx::opClosePath(Object args[], int numArgs) { if (!state->isCurPt()) { error(getPos(), "No current point in closepath"); return; } state->closePath(); } //------------------------------------------------------------------------ // path painting operators //------------------------------------------------------------------------ void Gfx::opEndPath(Object args[], int numArgs) { doEndPath(); } void Gfx::opStroke(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in stroke"); return; } if (state->isPath()) out->stroke(state); doEndPath(); } void Gfx::opCloseStroke(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in closepath/stroke"); return; } if (state->isPath()) { state->closePath(); out->stroke(state); } doEndPath(); } void Gfx::opFill(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in fill"); return; } if (state->isPath()) { if (state->getFillColorSpace()->getMode() == csPattern) { doPatternFill(gFalse); } else { out->fill(state); } } doEndPath(); } void Gfx::opEOFill(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in eofill"); return; } if (state->isPath()) { if (state->getFillColorSpace()->getMode() == csPattern) { doPatternFill(gTrue); } else { out->eoFill(state); } } doEndPath(); } void Gfx::opFillStroke(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in fill/stroke"); return; } if (state->isPath()) { if (state->getFillColorSpace()->getMode() == csPattern) { doPatternFill(gFalse); } else { out->fill(state); } out->stroke(state); } doEndPath(); } void Gfx::opCloseFillStroke(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in closepath/fill/stroke"); return; } if (state->isPath()) { state->closePath(); if (state->getFillColorSpace()->getMode() == csPattern) { doPatternFill(gFalse); } else { out->fill(state); } out->stroke(state); } doEndPath(); } void Gfx::opEOFillStroke(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in eofill/stroke"); return; } if (state->isPath()) { if (state->getFillColorSpace()->getMode() == csPattern) { doPatternFill(gTrue); } else { out->eoFill(state); } out->stroke(state); } doEndPath(); } void Gfx::opCloseEOFillStroke(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in closepath/eofill/stroke"); return; } if (state->isPath()) { state->closePath(); if (state->getFillColorSpace()->getMode() == csPattern) { doPatternFill(gTrue); } else { out->eoFill(state); } out->stroke(state); } doEndPath(); } void Gfx::doPatternFill(GBool eoFill) { GfxPattern *pattern; // 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 // certainly don't contain any text if (!out->needNonText()) { return; } if (!(pattern = state->getFillPattern())) { 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; } } 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(); btm = baseMatrix; ptm = tPat->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]; // construct a (base 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[2] = -m1[2] * det; imb[3] = m1[0] * det; imb[4] = (m1[2] * m1[5] - m1[3] * m1[4]) * det; imb[5] = (m1[1] * m1[4] - m1[0] * m1[5]) * det; // save current graphics state savedPath = state->getPath()->copy(); saveState(); // 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()); state->setStrokeColorSpace(cs->copy()); state->setStrokeColor(state->getFillColor()); } else { state->setFillColorSpace(new GfxDeviceGrayColorSpace()); state->setStrokeColorSpace(new GfxDeviceGrayColorSpace()); } state->setFillPattern(NULL); out->updateFillColor(state); state->setStrokePattern(NULL); out->updateStrokeColor(state); state->setLineWidth(0); out->updateLineWidth(state); // clip to current path state->clip(); if (eoFill) { out->eoClip(state); } else { out->clip(state); } state->clearPath(); // transform clip region bbox to pattern space state->getClipBBox(&cxMin, &cyMin, &cxMax, &cyMax); 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]; y1 = cxMin * imb[1] + cyMax * imb[3] + imb[5]; if (x1 < xMin) { xMin = x1; } else if (x1 > xMax) { xMax = x1; } if (y1 < yMin) { yMin = y1; } else if (y1 > yMax) { yMax = y1; } x1 = cxMax * imb[0] + cyMin * imb[2] + imb[4]; y1 = cxMax * imb[1] + cyMin * imb[3] + imb[5]; if (x1 < xMin) { xMin = x1; } else if (x1 > xMax) { xMax = x1; } if (y1 < yMin) { yMin = y1; } else if (y1 > yMax) { yMax = y1; } x1 = cxMax * imb[0] + cyMax * imb[2] + imb[4]; y1 = cxMax * imb[1] + cyMax * imb[3] + imb[5]; if (x1 < xMin) { xMin = x1; } else if (x1 > xMax) { xMax = x1; } if (y1 < yMin) { yMin = y1; } else if (y1 > yMax) { yMax = y1; } // draw the pattern //~ this should treat negative steps differently -- start at right/top //~ edge instead of left/bottom (?) xstep = fabs(tPat->getXStep()); ystep = fabs(tPat->getYStep()); 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()); } } // restore graphics state 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->clearPath(); } // clip to current path state->clip(); if (eoFill) { out->eoClip(state); } else { out->clip(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]); // set the color space state->setFillColorSpace(shading->getColorSpace()->copy()); // 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; } // 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()))) { return; } // 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->clearPath(); } // set the color space state->setFillColorSpace(shading->getColorSpace()->copy()); // 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; } // restore graphics state restoreState(); state->setPath(savedPath); delete shading; } void Gfx::doFunctionShFill(GfxFunctionShading *shading) { double x0, y0, x1, y1; GfxColor colors[4]; 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 (fabs(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; double tMin, tMax, t, tx, ty; double s[4], sMin, sMax, tmp; double ux0, uy0, ux1, uy1, vx0, vy0, vx1, vy1; double t0, t1, tt; double ta[axialMaxSplits + 1]; int next[axialMaxSplits + 1]; GfxColor color0, color1; 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: 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 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; } } 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; } // 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]); } // 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 (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; } } 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 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]; } } void Gfx::doRadialShFill(GfxRadialShading *shading) { double sMin, sMax, xMin, yMin, xMax, yMax; double x0, y0, r0, x1, y1, r1, t0, t1; int nComps; GfxColor colorA, colorB; double xa, ya, xb, yb, ra, rb; double ta, tb, sa, sb; int ia, ib, k, n; double *ctm; double angle, t; // 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 //~ 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; } } } 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; } } } // 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; 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) { shading->getColor(t0, &colorB); } else if (tb > t1) { shading->getColor(t1, &colorB); } else { shading->getColor(tb, &colorB); } while (ib - ia > 1) { for (k = 0; k < nComps; ++k) { if (fabs(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] = 0.5 * (colorA.c[k] + colorB.c[k]); } 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)); } 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(); // 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; } } void Gfx::doEndPath() { if (state->isCurPt() && clip != clipNone) { state->clip(); if (clip == clipNormal) { out->clip(state); } else { out->eoClip(state); } } clip = clipNone; state->clearPath(); } //------------------------------------------------------------------------ // path clipping operators //------------------------------------------------------------------------ void Gfx::opClip(Object args[], int numArgs) { clip = clipNormal; } void Gfx::opEOClip(Object args[], int numArgs) { clip = clipEO; } //------------------------------------------------------------------------ // text object operators //------------------------------------------------------------------------ void Gfx::opBeginText(Object args[], int numArgs) { state->setTextMat(1, 0, 0, 1, 0, 0); state->textMoveTo(0, 0); out->updateTextMat(state); out->updateTextPos(state); fontChanged = gTrue; } void Gfx::opEndText(Object args[], int numArgs) { out->endTextObject(state); } //------------------------------------------------------------------------ // text state operators //------------------------------------------------------------------------ void Gfx::opSetCharSpacing(Object args[], int numArgs) { state->setCharSpace(args[0].getNum()); out->updateCharSpace(state); } void Gfx::opSetFont(Object args[], int numArgs) { GfxFont *font; if (!(font = res->lookupFont(args[0].getName()))) { return; } if (printCommands) { printf(" font: tag=%s name='%s' %g\n", font->getTag()->getCString(), font->getName() ? font->getName()->getCString() : "???", args[1].getNum()); fflush(stdout); } state->setFont(font, args[1].getNum()); fontChanged = gTrue; } void Gfx::opSetTextLeading(Object args[], int numArgs) { state->setLeading(args[0].getNum()); } void Gfx::opSetTextRender(Object args[], int numArgs) { state->setRender(args[0].getInt()); out->updateRender(state); } void Gfx::opSetTextRise(Object args[], int numArgs) { state->setRise(args[0].getNum()); out->updateRise(state); } void Gfx::opSetWordSpacing(Object args[], int numArgs) { state->setWordSpace(args[0].getNum()); out->updateWordSpace(state); } void Gfx::opSetHorizScaling(Object args[], int numArgs) { state->setHorizScaling(args[0].getNum()); out->updateHorizScaling(state); fontChanged = gTrue; } //------------------------------------------------------------------------ // text positioning operators //------------------------------------------------------------------------ void Gfx::opTextMove(Object args[], int numArgs) { double tx, ty; tx = state->getLineX() + args[0].getNum(); ty = state->getLineY() + args[1].getNum(); state->textMoveTo(tx, ty); out->updateTextPos(state); } void Gfx::opTextMoveSet(Object args[], int numArgs) { double tx, ty; tx = state->getLineX() + args[0].getNum(); ty = args[1].getNum(); state->setLeading(-ty); ty += state->getLineY(); state->textMoveTo(tx, ty); out->updateTextPos(state); } void Gfx::opSetTextMatrix(Object args[], int numArgs) { state->setTextMat(args[0].getNum(), args[1].getNum(), args[2].getNum(), args[3].getNum(), args[4].getNum(), args[5].getNum()); state->textMoveTo(0, 0); out->updateTextMat(state); out->updateTextPos(state); fontChanged = gTrue; } void Gfx::opTextNextLine(Object args[], int numArgs) { double tx, ty; tx = state->getLineX(); ty = state->getLineY() - state->getLeading(); state->textMoveTo(tx, ty); out->updateTextPos(state); } //------------------------------------------------------------------------ // text string operators //------------------------------------------------------------------------ void Gfx::opShowText(Object args[], int numArgs) { if (!state->getFont()) { error(getPos(), "No font in show"); return; } doShowText(args[0].getString()); } void Gfx::opMoveShowText(Object args[], int numArgs) { double tx, ty; if (!state->getFont()) { error(getPos(), "No font in move/show"); return; } tx = state->getLineX(); ty = state->getLineY() - state->getLeading(); state->textMoveTo(tx, ty); out->updateTextPos(state); doShowText(args[0].getString()); } void Gfx::opMoveSetShowText(Object args[], int numArgs) { double tx, ty; if (!state->getFont()) { error(getPos(), "No font in move/set/show"); return; } state->setWordSpace(args[0].getNum()); state->setCharSpace(args[1].getNum()); tx = state->getLineX(); ty = state->getLineY() - state->getLeading(); state->textMoveTo(tx, ty); out->updateWordSpace(state); out->updateCharSpace(state); out->updateTextPos(state); doShowText(args[2].getString()); } void Gfx::opShowSpaceText(Object args[], int numArgs) { Array *a; Object obj; int wMode; int i; if (!state->getFont()) { error(getPos(), "No font in show/space"); return; } wMode = state->getFont()->getWMode(); a = args[0].getArray(); for (i = 0; i < a->getLength(); ++i) { a->get(i, &obj); if (obj.isNum()) { if (wMode) { state->textShift(0, -obj.getNum() * 0.001 * state->getFontSize()); } else { state->textShift(-obj.getNum() * 0.001 * state->getFontSize(), 0); } out->updateTextShift(state, obj.getNum()); } else if (obj.isString()) { doShowText(obj.getString()); } else { error(getPos(), "Element of show/space array must be number or string"); } obj.free(); } } void Gfx::doShowText(GString *s) { GfxFont *font; int wMode; double riseX, riseY; CharCode code; Unicode u[8]; 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; Object charProc; Dict *resDict; Parser *oldParser; char *p; int len, n, uLen, nChars, nSpaces, i; if (fontChanged) { out->updateFont(state); fontChanged = gFalse; } font = state->getFont(); wMode = font->getWMode(); if (out->useDrawChar()) { out->beginString(state, s); } // handle a Type 3 char if (font->getType() == fontType3 && out->interpretType3Chars()) { mat = state->getCTM(); for (i = 0; i < 6; ++i) { oldCTM[i] = mat[i]; } mat = state->getTextMat(); newCTM[0] = mat[0] * oldCTM[0] + mat[1] * oldCTM[2]; newCTM[1] = mat[0] * oldCTM[1] + mat[1] * oldCTM[3]; newCTM[2] = mat[2] * oldCTM[0] + mat[3] * oldCTM[2]; newCTM[3] = mat[2] * oldCTM[1] + mat[3] * oldCTM[3]; mat = font->getFontMatrix(); newCTM[0] = mat[0] * newCTM[0] + mat[1] * newCTM[2]; newCTM[1] = mat[0] * newCTM[1] + mat[1] * newCTM[3]; 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(); while (len > 0) { n = font->getNextChar(p, len, &code, u, (int)(sizeof(u) / sizeof(Unicode)), &uLen, &dx, &dy, &originX, &originY); dx = dx * state->getFontSize() + state->getCharSpace(); if (n == 1 && *p == ' ') { dx += state->getWordSpace(); } dx *= state->getHorizScaling(); dy *= state->getFontSize(); state->textTransformDelta(dx, dy, &tdx, &tdy); state->transform(curX + riseX, curY + riseY, &x, &y); saveState(); state->setCTM(newCTM[0], newCTM[1], newCTM[2], newCTM[3], x, y); //~ out->updateCTM(???) 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); } if (charProc.isStream()) { display(&charProc, gFalse); } else { error(getPos(), "Missing or bad Type3 CharProc entry"); } out->endType3Char(state); if (resDict) { popResources(); } charProc.free(); } restoreState(); // GfxState::restore() does *not* restore the current position, // 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; } parser = oldParser; } else if (out->useDrawChar()) { state->textTransformDelta(0, state->getRise(), &riseX, &riseY); p = s->getCString(); len = s->getLength(); while (len > 0) { n = font->getNextChar(p, len, &code, u, (int)(sizeof(u) / sizeof(Unicode)), &uLen, &dx, &dy, &originX, &originY); if (wMode) { dx *= state->getFontSize(); dy = dy * state->getFontSize() + state->getCharSpace(); if (n == 1 && *p == ' ') { dy += state->getWordSpace(); } } else { dx = dx * state->getFontSize() + state->getCharSpace(); if (n == 1 && *p == ' ') { dx += state->getWordSpace(); } dx *= state->getHorizScaling(); dy *= state->getFontSize(); } state->textTransformDelta(dx, dy, &tdx, &tdy); originX *= state->getFontSize(); 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); state->shift(tdx, tdy); p += n; len -= n; } } else { dx = dy = 0; p = s->getCString(); len = s->getLength(); nChars = nSpaces = 0; while (len > 0) { n = font->getNextChar(p, len, &code, u, (int)(sizeof(u) / sizeof(Unicode)), &uLen, &dx2, &dy2, &originX, &originY); dx += dx2; dy += dy2; if (n == 1 && *p == ' ') { ++nSpaces; } ++nChars; p += n; len -= n; } if (wMode) { dx *= state->getFontSize(); dy = dy * state->getFontSize() + nChars * state->getCharSpace() + nSpaces * state->getWordSpace(); } else { dx = dx * state->getFontSize() + nChars * state->getCharSpace() + nSpaces * state->getWordSpace(); dx *= state->getHorizScaling(); dy *= state->getFontSize(); } state->textTransformDelta(dx, dy, &tdx, &tdy); out->drawString(state, s); state->shift(tdx, tdy); } if (out->useDrawChar()) { out->endString(state); } updateLevel += 10 * s->getLength(); } //------------------------------------------------------------------------ // XObject operators //------------------------------------------------------------------------ void Gfx::opXObject(Object args[], int numArgs) { Object obj1, obj2, obj3, refObj; #if OPI_SUPPORT Object opiDict; #endif if (!res->lookupXObject(args[0].getName(), &obj1)) { return; } if (!obj1.isStream()) { error(getPos(), "XObject '%s' is wrong type", args[0].getName()); obj1.free(); return; } #if OPI_SUPPORT obj1.streamGetDict()->lookup("OPI", &opiDict); if (opiDict.isDict()) { out->opiBegin(state, opiDict.getDict()); } #endif obj1.streamGetDict()->lookup("Subtype", &obj2); if (obj2.isName("Image")) { 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")) { obj1.streamGetDict()->lookup("Level1", &obj3); out->psXObject(obj1.getStream(), obj3.isStream() ? obj3.getStream() : (Stream *)NULL); } else if (obj2.isName()) { error(getPos(), "Unknown XObject subtype '%s'", obj2.getName()); } else { error(getPos(), "XObject subtype is missing or wrong type"); } obj2.free(); #if OPI_SUPPORT if (opiDict.isDict()) { out->opiEnd(state, opiDict.getDict()); } opiDict.free(); #endif obj1.free(); } void Gfx::doImage(Object *ref, Stream *str, GBool inlineImg) { Dict *dict; int width, height; int bits; GBool mask; GBool invert; GfxColorSpace *colorSpace; GfxImageColorMap *colorMap; Object maskObj; GBool haveMask; int maskColors[2*gfxColorMaxComps]; Object obj1, obj2; int i; // get stream dict dict = str->getDict(); // get size dict->lookup("Width", &obj1); if (obj1.isNull()) { obj1.free(); dict->lookup("W", &obj1); } if (!obj1.isInt()) goto err2; width = obj1.getInt(); obj1.free(); dict->lookup("Height", &obj1); if (obj1.isNull()) { obj1.free(); dict->lookup("H", &obj1); } if (!obj1.isInt()) goto err2; height = obj1.getInt(); obj1.free(); // image or mask? dict->lookup("ImageMask", &obj1); if (obj1.isNull()) { obj1.free(); dict->lookup("IM", &obj1); } mask = gFalse; if (obj1.isBool()) mask = obj1.getBool(); else if (!obj1.isNull()) goto err2; obj1.free(); // bit depth 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(); // display a mask if (mask) { // check for inverted mask if (bits != 1) goto err1; invert = gFalse; dict->lookup("Decode", &obj1); if (obj1.isNull()) { obj1.free(); dict->lookup("D", &obj1); } if (obj1.isArray()) { obj1.arrayGet(0, &obj2); if (obj2.isInt() && obj2.getInt() == 1) invert = gTrue; obj2.free(); } else if (!obj1.isNull()) { goto err2; } obj1.free(); // draw it out->drawImageMask(state, ref, str, width, height, invert, inlineImg); } else { // get color space and color map dict->lookup("ColorSpace", &obj1); if (obj1.isNull()) { obj1.free(); dict->lookup("CS", &obj1); } if (obj1.isName()) { res->lookupColorSpace(obj1.getName(), &obj2); if (!obj2.isNull()) { obj1.free(); obj1 = obj2; } else { obj2.free(); } } colorSpace = GfxColorSpace::parse(&obj1); obj1.free(); if (!colorSpace) { goto err1; } dict->lookup("Decode", &obj1); if (obj1.isNull()) { obj1.free(); dict->lookup("D", &obj1); } colorMap = new GfxImageColorMap(bits, &obj1, colorSpace); obj1.free(); if (!colorMap->isOk()) { delete colorMap; goto err1; } // get the mask haveMask = gFalse; dict->lookup("Mask", &maskObj); if (maskObj.isArray()) { for (i = 0; i < maskObj.arrayGetLength(); ++i) { maskObj.arrayGet(i, &obj1); maskColors[i] = obj1.getInt(); obj1.free(); } haveMask = gTrue; } // draw it out->drawImage(state, ref, str, width, height, colorMap, haveMask ? maskColors : (int *)NULL, inlineImg); delete colorMap; maskObj.free(); } if ((i = width * height) > 1000) { i = 1000; } updateLevel += i; return; err2: obj1.free(); err1: error(getPos(), "Bad image parameters"); } void Gfx::doForm(Object *str) { Dict *dict; Object matrixObj, bboxObj; double m[6], bbox[6]; Object resObj; Dict *resDict; 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)) { error(getPos(), "Unknown form type"); } obj1.free(); // get bounding box dict->lookup("BBox", &bboxObj); if (!bboxObj.isArray()) { matrixObj.free(); bboxObj.free(); error(getPos(), "Bad form bounding box"); return; } for (i = 0; i < 4; ++i) { bboxObj.arrayGet(i, &obj1); bbox[i] = obj1.getNum(); obj1.free(); } bboxObj.free(); // get matrix dict->lookup("Matrix", &matrixObj); if (matrixObj.isArray()) { for (i = 0; i < 6; ++i) { matrixObj.arrayGet(i, &obj1); m[i] = obj1.getNum(); obj1.free(); } } else { m[0] = 1; m[1] = 0; m[2] = 0; m[3] = 1; m[4] = 0; m[5] = 0; } matrixObj.free(); // get resources dict->lookup("Resources", &resObj); resDict = resObj.isDict() ? resObj.getDict() : (Dict *)NULL; // draw it ++formDepth; doForm1(str, resDict, m, bbox); --formDepth; resObj.free(); } void Gfx::doAnnot(Object *str, double xMin, double yMin, double xMax, double yMax) { Dict *dict, *resDict; Object matrixObj, bboxObj, resObj; Object obj1; double m[6], bbox[6], ictm[6]; double *ctm; double formX0, formY0, formX1, formY1; double annotX0, annotY0, annotX1, annotY1; double det, x, y, sx, sy; int i; // get stream dict dict = str->streamGetDict(); // get the form bounding box dict->lookup("BBox", &bboxObj); if (!bboxObj.isArray()) { bboxObj.free(); error(getPos(), "Bad form bounding box"); return; } for (i = 0; i < 4; ++i) { bboxObj.arrayGet(i, &obj1); bbox[i] = obj1.getNum(); obj1.free(); } bboxObj.free(); // get the form matrix dict->lookup("Matrix", &matrixObj); if (matrixObj.isArray()) { for (i = 0; i < 6; ++i) { matrixObj.arrayGet(i, &obj1); m[i] = obj1.getNum(); obj1.free(); } } else { m[0] = 1; m[1] = 0; m[2] = 0; m[3] = 1; m[4] = 0; m[5] = 0; } matrixObj.free(); // transform the form bbox from form space to user space formX0 = bbox[0] * m[0] + bbox[1] * m[2] + m[4]; formY0 = bbox[0] * m[1] + bbox[1] * m[3] + m[5]; formX1 = bbox[2] * m[0] + bbox[3] * m[2] + m[4]; formY1 = bbox[2] * m[1] + bbox[3] * m[3] + m[5]; // transform the annotation bbox from default user space to user // space: (bbox * baseMatrix) * iCTM ctm = state->getCTM(); 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; x = baseMatrix[0] * xMin + baseMatrix[2] * yMin + baseMatrix[4]; y = baseMatrix[1] * xMin + baseMatrix[3] * yMin + baseMatrix[5]; annotX0 = ictm[0] * x + ictm[2] * y + ictm[4]; annotY0 = ictm[1] * x + ictm[3] * y + ictm[5]; x = baseMatrix[0] * xMax + baseMatrix[2] * yMax + baseMatrix[4]; y = baseMatrix[1] * xMax + baseMatrix[3] * yMax + baseMatrix[5]; annotX1 = ictm[0] * x + ictm[2] * y + ictm[4]; annotY1 = ictm[1] * x + ictm[3] * y + ictm[5]; // swap min/max coords if (formX0 > formX1) { x = formX0; formX0 = formX1; formX1 = x; } if (formY0 > formY1) { y = formY0; formY0 = formY1; formY1 = y; } if (annotX0 > annotX1) { x = annotX0; annotX0 = annotX1; annotX1 = x; } if (annotY0 > annotY1) { y = annotY0; annotY0 = annotY1; annotY1 = y; } // scale the form to fit the annotation bbox if (formX1 == formX0) { // this shouldn't happen sx = 1; } else { sx = (annotX1 - annotX0) / (formX1 - formX0); } if (formY1 == formY0) { // this shouldn't happen sy = 1; } else { sy = (annotY1 - annotY0) / (formY1 - formY0); } m[0] *= sx; m[2] *= sx; m[4] = (m[4] - formX0) * sx + annotX0; m[1] *= sy; m[3] *= sy; m[5] = (m[5] - formY0) * sy + annotY0; // get resources dict->lookup("Resources", &resObj); resDict = resObj.isDict() ? resObj.getDict() : (Dict *)NULL; // draw it doForm1(str, resDict, m, bbox); resObj.free(); bboxObj.free(); } void Gfx::doForm1(Object *str, Dict *resDict, double *matrix, double *bbox) { Parser *oldParser; double oldBaseMatrix[6]; int i; // push new resources on stack pushResources(resDict); // save current graphics state saveState(); // kill any pre-existing path state->clearPath(); // save current parser oldParser = parser; // set form transformation matrix state->concatCTM(matrix[0], matrix[1], matrix[2], matrix[3], matrix[4], matrix[5]); out->updateCTM(state, matrix[0], matrix[1], matrix[2], matrix[3], matrix[4], matrix[5]); // set new base matrix for (i = 0; i < 6; ++i) { oldBaseMatrix[i] = baseMatrix[i]; baseMatrix[i] = state->getCTM()[i]; } // set form bounding box state->moveTo(bbox[0], bbox[1]); state->lineTo(bbox[2], bbox[1]); state->lineTo(bbox[2], bbox[3]); state->lineTo(bbox[0], bbox[3]); state->closePath(); state->clip(); out->clip(state); state->clearPath(); // draw the form display(str, gFalse); // restore base matrix for (i = 0; i < 6; ++i) { baseMatrix[i] = oldBaseMatrix[i]; } // restore parser parser = oldParser; // restore graphics state restoreState(); // pop resource stack popResources(); return; } //------------------------------------------------------------------------ // in-line image operators //------------------------------------------------------------------------ void Gfx::opBeginImage(Object args[], int numArgs) { Stream *str; int c1, c2; // build dict/stream str = buildImageStream(); // display the image if (str) { doImage(NULL, str, gTrue); // skip 'EI' tag c1 = str->getBaseStream()->getChar(); c2 = str->getBaseStream()->getChar(); while (!(c1 == 'E' && c2 == 'I') && c2 != EOF) { c1 = c2; c2 = str->getBaseStream()->getChar(); } delete str; } } Stream *Gfx::buildImageStream() { Object dict; Object obj; char *key; Stream *str; // build dictionary dict.initDict(xref); parser->getObj(&obj); while (!obj.isCmd("ID") && !obj.isEOF()) { if (!obj.isName()) { error(getPos(), "Inline image dictionary key must be a name object"); obj.free(); } else { key = copyString(obj.getName()); obj.free(); parser->getObj(&obj); if (obj.isEOF() || obj.isError()) { gfree(key); break; } dict.dictAdd(key, &obj); } parser->getObj(&obj); } if (obj.isEOF()) { error(getPos(), "End of file in inline image"); obj.free(); dict.free(); return NULL; } obj.free(); // make stream str = new EmbedStream(parser->getStream(), &dict, gFalse, 0); str = str->addFilters(&dict); return str; } void Gfx::opImageData(Object args[], int numArgs) { error(getPos(), "Internal: got 'ID' operator"); } void Gfx::opEndImage(Object args[], int numArgs) { error(getPos(), "Internal: got 'EI' operator"); } //------------------------------------------------------------------------ // type 3 font operators //------------------------------------------------------------------------ void Gfx::opSetCharWidth(Object args[], int numArgs) { out->type3D0(state, args[0].getNum(), args[1].getNum()); } void Gfx::opSetCacheDevice(Object args[], int numArgs) { out->type3D1(state, args[0].getNum(), args[1].getNum(), args[2].getNum(), args[3].getNum(), args[4].getNum(), args[5].getNum()); } //------------------------------------------------------------------------ // compatibility operators //------------------------------------------------------------------------ void Gfx::opBeginIgnoreUndef(Object args[], int numArgs) { ++ignoreUndef; } void Gfx::opEndIgnoreUndef(Object args[], int numArgs) { if (ignoreUndef > 0) --ignoreUndef; } //------------------------------------------------------------------------ // marked content operators //------------------------------------------------------------------------ void Gfx::opBeginMarkedContent(Object args[], int numArgs) { if (printCommands) { printf(" marked content: %s ", args[0].getName()); if (numArgs == 2) args[2].print(stdout); printf("\n"); fflush(stdout); } } void Gfx::opEndMarkedContent(Object args[], int numArgs) { } void Gfx::opMarkPoint(Object args[], int numArgs) { if (printCommands) { printf(" mark point: %s ", args[0].getName()); if (numArgs == 2) args[2].print(stdout); printf("\n"); 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; }