//======================================================================== // // Gfx.cc // // Copyright 1996 Derek B. Noonburg // //======================================================================== #ifdef __GNUC__ #pragma implementation #endif #include #include #include #include "gmem.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 "Params.h" #include "Error.h" #include "Gfx.h" //------------------------------------------------------------------------ // Operator table //------------------------------------------------------------------------ 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}, {"s", 0, {tchkNone}, &Gfx::opCloseStroke}, {"sc", -4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opSetFillColor}, {"scn", -5, {tchkSCN, tchkSCN, tchkSCN, tchkSCN, tchkSCN}, &Gfx::opSetFillColorN}, {"v", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opCurveTo1}, {"w", 1, {tchkNum}, &Gfx::opSetLineWidth}, {"y", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, &Gfx::opCurveTo2}, }; #define numOps (sizeof(opTab) / sizeof(Operator)) //------------------------------------------------------------------------ // Gfx //------------------------------------------------------------------------ Gfx::Gfx(OutputDev *out1, int pageNum, Dict *resDict, int dpi, double x1, double y1, double x2, double y2, GBool crop, double cropX1, double cropY1, double cropX2, double cropY2, int rotate) { Object obj1; // start the resource stack res = new GfxResources(NULL); // build font dictionary res->fonts = NULL; if (resDict) { resDict->lookup("Font", &obj1); if (obj1.isDict()) res->fonts = new GfxFontDict(obj1.getDict()); obj1.free(); } // get XObject dictionary if (resDict) resDict->lookup("XObject", &res->xObjDict); else res->xObjDict.initNull(); // get colorspace dictionary if (resDict) resDict->lookup("ColorSpace", &res->colorSpaceDict); else res->colorSpaceDict.initNull(); // initialize out = out1; state = new GfxState(dpi, x1, y1, x2, y2, rotate, out->upsideDown()); fontChanged = gFalse; clip = clipNone; ignoreUndef = 0; out->startPage(pageNum, state); out->setDefaultCTM(state->getCTM()); out->updateAll(state); // set crop box if (crop) { state->moveTo(cropX1, cropY1); state->lineTo(cropX2, cropY1); state->lineTo(cropX2, cropY2); state->lineTo(cropX1, cropY2); state->closePath(); out->clip(state); state->clearPath(); } } Gfx::~Gfx() { GfxResources *resPtr; while (state->hasSaves()) { state = state->restore(); out->restoreState(state); } out->endPage(); while (res) { resPtr = res->next; delete res; res = resPtr; } if (state) delete state; } GfxResources::~GfxResources() { if (fonts) delete fonts; xObjDict.free(); colorSpaceDict.free(); } void Gfx::display(Object *obj) { 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(new Lexer(obj)); go(); } void Gfx::go() { Object obj; Object args[maxArgs]; int numCmds, numArgs; int i; // scan a sequence of objects numCmds = 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"); } execOp(&obj, args, numArgs); obj.free(); for (i = 0; i < numArgs; ++i) args[i].free(); numArgs = 0; // periodically update display if (++numCmds == 200) { out->dump(); numCmds = 0; } // 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"); } 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"); } for (i = 0; i < numArgs; ++i) args[i].free(); } // update display if (numCmds > 0) out->dump(); // clean up if (parser) delete parser; if (printCommands) fflush(stdout); } void Gfx::execOp(Object *cmd, Object args[], int numArgs) { Operator *op; char *name; int i; // find operator name = cmd->getName(); if (!(op = findOp(name))) { if (ignoreUndef == 0) error(getPos(), "Unknown operator '%s'", name); return; } // type check args if (op->numArgs >= 0) { if (numArgs != op->numArgs) { error(getPos(), "Wrong number (%d) of args to '%s' operator", numArgs, name); return; } } 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(&args[i], op->tchk[i])) { error(getPos(), "Arg #%d to '%s' operator is wrong type (%s)", i, name, args[i].getTypeName()); return; } } // do it (this->*op->func)(args, 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->getPos(); } GfxFont *Gfx::lookupFont(char *name) { GfxFont *font; GfxResources *resPtr; for (resPtr = res; resPtr; resPtr = resPtr->next) { if (resPtr->fonts) { if ((font = resPtr->fonts->lookup(name))) return font; } } error(getPos(), "unknown font tag '%s'", name); return NULL; } GBool Gfx::lookupXObject(char *name, Object *obj) { GfxResources *resPtr; for (resPtr = res; resPtr; resPtr = resPtr->next) { if (resPtr->xObjDict.isDict()) { if (!resPtr->xObjDict.dictLookup(name, obj)->isNull()) return gTrue; obj->free(); } } error(getPos(), "XObject '%s' is unknown", name); return gFalse; } void Gfx::lookupColorSpace(char *name, Object *obj) { GfxResources *resPtr; for (resPtr = res; resPtr; resPtr = resPtr->next) { if (resPtr->colorSpaceDict.isDict()) { if (!resPtr->colorSpaceDict.dictLookup(name, obj)->isNull()) return; obj->free(); } } obj->initNull(); } //------------------------------------------------------------------------ // graphics state operators //------------------------------------------------------------------------ void Gfx::opSave(Object args[], int numArgs) { out->saveState(state); state = state->save(); } void Gfx::opRestore(Object args[], int numArgs) { state = state->restore(); out->restoreState(state); } 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) { } //------------------------------------------------------------------------ // color operators //------------------------------------------------------------------------ void Gfx::opSetFillGray(Object args[], int numArgs) { state->setFillColorSpace(new GfxColorSpace(colorGray)); state->setFillGray(args[0].getNum()); out->updateFillColor(state); } void Gfx::opSetStrokeGray(Object args[], int numArgs) { state->setStrokeColorSpace(new GfxColorSpace(colorGray)); state->setStrokeGray(args[0].getNum()); out->updateStrokeColor(state); } void Gfx::opSetFillCMYKColor(Object args[], int numArgs) { state->setFillColorSpace(new GfxColorSpace(colorCMYK)); state->setFillCMYK(args[0].getNum(), args[1].getNum(), args[2].getNum(), args[3].getNum()); out->updateFillColor(state); } void Gfx::opSetStrokeCMYKColor(Object args[], int numArgs) { state->setStrokeColorSpace(new GfxColorSpace(colorCMYK)); state->setStrokeCMYK(args[0].getNum(), args[1].getNum(), args[2].getNum(), args[3].getNum()); out->updateStrokeColor(state); } void Gfx::opSetFillRGBColor(Object args[], int numArgs) { state->setFillColorSpace(new GfxColorSpace(colorRGB)); state->setFillRGB(args[0].getNum(), args[1].getNum(), args[2].getNum()); out->updateFillColor(state); } void Gfx::opSetStrokeRGBColor(Object args[], int numArgs) { state->setStrokeColorSpace(new GfxColorSpace(colorRGB)); state->setStrokeRGB(args[0].getNum(), args[1].getNum(), args[2].getNum()); out->updateStrokeColor(state); } void Gfx::opSetFillColorSpace(Object args[], int numArgs) { Object obj; GfxColorSpace *colorSpace; double x[4]; lookupColorSpace(args[0].getName(), &obj); if (obj.isNull()) colorSpace = new GfxColorSpace(&args[0]); else colorSpace = new GfxColorSpace(&obj); obj.free(); if (colorSpace->isOk()) { state->setFillColorSpace(colorSpace); } else { delete colorSpace; error(getPos(), "Bad colorspace"); } x[0] = x[1] = x[2] = x[3] = 0; state->setFillColor(x); out->updateFillColor(state); } void Gfx::opSetStrokeColorSpace(Object args[], int numArgs) { Object obj; GfxColorSpace *colorSpace; double x[4]; lookupColorSpace(args[0].getName(), &obj); if (obj.isNull()) colorSpace = new GfxColorSpace(&args[0]); else colorSpace = new GfxColorSpace(&obj); obj.free(); if (colorSpace->isOk()) { state->setStrokeColorSpace(colorSpace); } else { delete colorSpace; error(getPos(), "Bad colorspace"); } x[0] = x[1] = x[2] = x[3] = 0; state->setStrokeColor(x); out->updateStrokeColor(state); } void Gfx::opSetFillColor(Object args[], int numArgs) { double x[4]; int i; x[0] = x[1] = x[2] = x[3] = 0; for (i = 0; i < numArgs; ++i) x[i] = args[i].getNum(); state->setFillColor(x); out->updateFillColor(state); } void Gfx::opSetStrokeColor(Object args[], int numArgs) { double x[4]; int i; x[0] = x[1] = x[2] = x[3] = 0; for (i = 0; i < numArgs; ++i) x[i] = args[i].getNum(); state->setStrokeColor(x); out->updateStrokeColor(state); } void Gfx::opSetFillColorN(Object args[], int numArgs) { double x[4]; int i; x[0] = x[1] = x[2] = x[3] = 0; for (i = 0; i < numArgs && i < 4; ++i) { if (args[i].isNum()) x[i] = args[i].getNum(); else break; } state->setFillColor(x); out->updateFillColor(state); } void Gfx::opSetStrokeColorN(Object args[], int numArgs) { double x[4]; int i; x[0] = x[1] = x[2] = x[3] = 0; for (i = 0; i < numArgs && i < 4; ++i) { if (args[i].isNum()) x[i] = args[i].getNum(); else break; } state->setStrokeColor(x); 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->isPath()) { 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()) out->fill(state); doEndPath(); } void Gfx::opEOFill(Object args[], int numArgs) { if (!state->isCurPt()) { //error(getPos(), "No path in eofill"); return; } if (state->isPath()) 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()) { 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(); 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()) { 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(); out->eoFill(state); out->stroke(state); } doEndPath(); } void Gfx::doEndPath() { if (state->isPath()) { if (clip == clipNormal) out->clip(state); else if (clip == clipEO) 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) { } //------------------------------------------------------------------------ // 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 = lookupFont(args[0].getName()))) return; if (printCommands) { printf(" font: '%s' %g\n", font->getName() ? font->getName()->getCString() : "???", args[1].getNum()); } 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); } //------------------------------------------------------------------------ // 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 i; if (!state->getFont()) { error(getPos(), "No font in show/space"); return; } a = args[0].getArray(); for (i = 0; i < a->getLength(); ++i) { a->get(i, &obj); if (obj.isNum()) { state->textShift(-obj.getNum() * 0.001 * state->getFontSize()); 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; GfxFontEncoding16 *enc; Guchar *p; Guchar c8; int c16; GString *s16; int m, n; double dx, dy, width, w, h; if (fontChanged) { out->updateFont(state); fontChanged = gFalse; } font = state->getFont(); //----- 16-bit font if (font->is16Bit()) { enc = font->getEncoding16(); if (out->useDrawChar()) { out->beginString(state, s); s16 = NULL; } else { s16 = new GString(" "); } state->textTransformDelta(0, state->getRise(), &dx, &dy); p = (Guchar *)s->getCString(); n = s->getLength(); while (n > 0) { m = getNextChar16(enc, p, &c16); width = state->getFontSize() * state->getHorizScaling() * font->getWidth16(c16) + state->getCharSpace(); if (c16 == ' ') width += state->getWordSpace(); state->textTransformDelta(width, 0, &w, &h); if (out->useDrawChar()) { out->drawChar16(state, state->getCurX() + dx, state->getCurY() + dy, w, h, c16); } else { s16->setChar(0, (char)(c16 >> 8)); s16->setChar(1, (char)c16); out->drawString16(state, s16); } state->textShift(width); n -= m; p += m; } if (out->useDrawChar()) out->endString(state); else delete s16; //----- 8-bit font } else { if (out->useDrawChar()) { out->beginString(state, s); state->textTransformDelta(0, state->getRise(), &dx, &dy); for (p = (Guchar *)s->getCString(), n = s->getLength(); n; ++p, --n) { c8 = *p; width = state->getFontSize() * state->getHorizScaling() * font->getWidth(c8) + state->getCharSpace(); if (c8 == ' ') width += state->getWordSpace(); state->textTransformDelta(width, 0, &w, &h); out->drawChar(state, state->getCurX() + dx, state->getCurY() + dy, w, h, c8); state->textShift(width); } out->endString(state); } else { out->drawString(state, s); width = state->getFontSize() * state->getHorizScaling() * font->getWidth(s) + s->getLength() * state->getCharSpace(); for (p = (Guchar *)s->getCString(), n = s->getLength(); n; ++p, --n) { if (*p == ' ') width += state->getWordSpace(); } state->textShift(width); } } } int Gfx::getNextChar16(GfxFontEncoding16 *enc, Guchar *p, int *c16) { int n; int code; int a, b, m; n = enc->codeLen[*p]; if (n == 1) { *c16 = enc->map1[*p]; } else { code = (p[0] << 8) + p[1]; a = 0; b = enc->map2Len; // invariant: map2[2*a] <= code < map2[2*b] while (b - a > 1) { m = (a + b) / 2; if (enc->map2[2*m] <= code) a = m; else if (enc->map2[2*m] > code) b = m; else break; } *c16 = enc->map2[2*a+1] + (code - enc->map2[2*a]); } return n; } //------------------------------------------------------------------------ // XObject operators //------------------------------------------------------------------------ void Gfx::opXObject(Object args[], int numArgs) { Object obj1, obj2; if (!lookupXObject(args[0].getName(), &obj1)) return; if (!obj1.isStream("XObject")) { error(getPos(), "XObject '%s' is wrong type", args[0].getName()); obj1.free(); return; } obj1.streamGetDict()->lookup("Subtype", &obj2); if (obj2.isName("Image")) doImage(obj1.getStream(), gFalse); else if (obj2.isName("Form")) doForm(&obj1); else if (obj2.isName()) error(getPos(), "Unknown XObject subtype '%s'", obj2.getName()); else error(getPos(), "XObject subtype is missing or wrong type"); obj2.free(); obj1.free(); } void Gfx::doImage(Stream *str, GBool inlineImg) { Dict *dict; Object obj1, obj2; int width, height; int bits; GBool mask; GfxColorSpace *colorSpace; GfxImageColorMap *colorMap; GBool invert; // 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()) goto err2; bits = obj1.getInt(); 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, 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()) { lookupColorSpace(obj1.getName(), &obj2); if (!obj2.isNull()) { obj1.free(); obj1 = obj2; } else { obj2.free(); } } colorSpace = new GfxColorSpace(&obj1); obj1.free(); if (!colorSpace->isOk()) { delete 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 colorSpace; goto err1; } // draw it out->drawImage(state, str, width, height, colorMap, inlineImg); delete colorMap; } return; err2: obj1.free(); err1: error(getPos(), "Bad image parameters"); } void Gfx::doForm(Object *str) { Parser *oldParser; GfxResources *resPtr; Dict *dict; Dict *resDict; Object matrixObj, bboxObj; double m[6]; Object obj1, obj2; int i; // get stream dict dict = str->streamGetDict(); // check form type dict->lookup("FormType", &obj1); if (!(obj1.isInt() && obj1.getInt() == 1)) { obj1.free(); error(getPos(), "Unknown form type"); return; } obj1.free(); // get matrix and bounding box dict->lookup("Matrix", &matrixObj); if (!matrixObj.isArray()) { matrixObj.free(); error(getPos(), "Bad form matrix"); return; } dict->lookup("BBox", &bboxObj); if (!bboxObj.isArray()) { matrixObj.free(); bboxObj.free(); error(getPos(), "Bad form bounding box"); return; } // push new resources on stack dict->lookup("Resources", &obj1); if (obj1.isDict()) { resDict = obj1.getDict(); res = new GfxResources(res); res->fonts = NULL; resDict->lookup("Font", &obj2); if (obj2.isDict()) res->fonts = new GfxFontDict(obj2.getDict()); obj2.free(); resDict->lookup("XObject", &res->xObjDict); resDict->lookup("ColorSpace", &res->colorSpaceDict); obj1.free(); } // save current graphics state out->saveState(state); state = state->save(); // save current parser oldParser = parser; // set form transformation matrix for (i = 0; i < 6; ++i) { matrixObj.arrayGet(i, &obj1); m[i] = obj1.getNum(); obj1.free(); } 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 form bounding box for (i = 0; i < 4; ++i) { bboxObj.arrayGet(i, &obj1); m[i] = obj1.getNum(); obj1.free(); } state->moveTo(m[0], m[1]); state->lineTo(m[0]+m[2], m[1]); state->lineTo(m[0]+m[2], m[1]+m[3]); state->lineTo(m[0], m[1]+m[3]); state->closePath(); out->clip(state); state->clearPath(); // draw the form display(str); // free matrix and bounding box matrixObj.free(); bboxObj.free(); // restore parser parser = oldParser; // restore graphics state state = state->restore(); out->restoreState(state); // pop resource stack resPtr = res->next; delete res; res = resPtr; 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(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(); 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(); parser->getObj(&obj); } else { key = copyString(obj.getName()); obj.free(); parser->getObj(&obj); if (obj.isEOF() || obj.isError()) break; dict.dictAdd(key, &obj); } parser->getObj(&obj); } if (obj.isEOF()) error(getPos(), "End of file in inline image"); obj.free(); // make stream str = new SubStream(parser->getStream(), &dict); 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) { error(getPos(), "Encountered 'd0' operator in content stream"); } void Gfx::opSetCacheDevice(Object args[], int numArgs) { error(getPos(), "Encountered 'd1' operator in content stream"); } //------------------------------------------------------------------------ // 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"); } } 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"); } }