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-rw-r--r--src/extension/internal/pdfinput/pdf-parser.cpp3196
1 files changed, 3196 insertions, 0 deletions
diff --git a/src/extension/internal/pdfinput/pdf-parser.cpp b/src/extension/internal/pdfinput/pdf-parser.cpp
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+++ b/src/extension/internal/pdfinput/pdf-parser.cpp
@@ -0,0 +1,3196 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * PDF parsing using libpoppler.
+ *//*
+ * Authors:
+ * Derived from poppler's Gfx.cc, which was derived from Xpdf by 1996-2003 Glyph & Cog, LLC
+ * Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h" // only include where actually required!
+#endif
+
+#ifdef HAVE_POPPLER
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <cmath>
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+#include "2geom/transforms.h"
+#include "Annot.h"
+#include "Array.h"
+#include "CharTypes.h"
+#include "Dict.h"
+#include "Error.h"
+#include "Gfx.h"
+#include "GfxFont.h"
+#include "GfxState.h"
+#include "GlobalParams.h"
+#include "Lexer.h"
+#include "Object.h"
+#include "OutputDev.h"
+#include "PDFDoc.h"
+#include "Page.h"
+#include "Parser.h"
+#include "Stream.h"
+#include "glib/poppler-features.h"
+#include "goo/GooString.h"
+#include "goo/gmem.h"
+#include "pdf-parser.h"
+#include "pdf-utils.h"
+#include "poppler-cairo-font-engine.h"
+#include "poppler-transition-api.h"
+#include "poppler-utils.h"
+#include "svg-builder.h"
+#include "util/units.h"
+
+// the MSVC math.h doesn't define this
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+//------------------------------------------------------------------------
+// constants
+//------------------------------------------------------------------------
+
+// Default max delta allowed in any color component for a shading fill.
+#define defaultShadingColorDelta (dblToCol( 1 / 2.0 ))
+
+// Default max recursive depth for a shading fill.
+#define defaultShadingMaxDepth 6
+
+// Max number of operators kept in the history list.
+#define maxOperatorHistoryDepth 16
+
+//------------------------------------------------------------------------
+// Operator table
+//------------------------------------------------------------------------
+
+PdfOperator PdfParser::opTab[] = {
+ {"\"", 3, {tchkNum, tchkNum, tchkString},
+ &PdfParser::opMoveSetShowText},
+ {"'", 1, {tchkString},
+ &PdfParser::opMoveShowText},
+ {"B", 0, {tchkNone},
+ &PdfParser::opFillStroke},
+ {"B*", 0, {tchkNone},
+ &PdfParser::opEOFillStroke},
+ {"BDC", 2, {tchkName, tchkProps},
+ &PdfParser::opBeginMarkedContent},
+ {"BI", 0, {tchkNone},
+ &PdfParser::opBeginImage},
+ {"BMC", 1, {tchkName},
+ &PdfParser::opBeginMarkedContent},
+ {"BT", 0, {tchkNone},
+ &PdfParser::opBeginText},
+ {"BX", 0, {tchkNone},
+ &PdfParser::opBeginIgnoreUndef},
+ {"CS", 1, {tchkName},
+ &PdfParser::opSetStrokeColorSpace},
+ {"DP", 2, {tchkName, tchkProps},
+ &PdfParser::opMarkPoint},
+ {"Do", 1, {tchkName},
+ &PdfParser::opXObject},
+ {"EI", 0, {tchkNone},
+ &PdfParser::opEndImage},
+ {"EMC", 0, {tchkNone},
+ &PdfParser::opEndMarkedContent},
+ {"ET", 0, {tchkNone},
+ &PdfParser::opEndText},
+ {"EX", 0, {tchkNone},
+ &PdfParser::opEndIgnoreUndef},
+ {"F", 0, {tchkNone},
+ &PdfParser::opFill},
+ {"G", 1, {tchkNum},
+ &PdfParser::opSetStrokeGray},
+ {"ID", 0, {tchkNone},
+ &PdfParser::opImageData},
+ {"J", 1, {tchkInt},
+ &PdfParser::opSetLineCap},
+ {"K", 4, {tchkNum, tchkNum, tchkNum, tchkNum},
+ &PdfParser::opSetStrokeCMYKColor},
+ {"M", 1, {tchkNum},
+ &PdfParser::opSetMiterLimit},
+ {"MP", 1, {tchkName},
+ &PdfParser::opMarkPoint},
+ {"Q", 0, {tchkNone},
+ &PdfParser::opRestore},
+ {"RG", 3, {tchkNum, tchkNum, tchkNum},
+ &PdfParser::opSetStrokeRGBColor},
+ {"S", 0, {tchkNone},
+ &PdfParser::opStroke},
+ {"SC", -4, {tchkNum, tchkNum, tchkNum, tchkNum},
+ &PdfParser::opSetStrokeColor},
+ {"SCN", -33, {tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN,},
+ &PdfParser::opSetStrokeColorN},
+ {"T*", 0, {tchkNone},
+ &PdfParser::opTextNextLine},
+ {"TD", 2, {tchkNum, tchkNum},
+ &PdfParser::opTextMoveSet},
+ {"TJ", 1, {tchkArray},
+ &PdfParser::opShowSpaceText},
+ {"TL", 1, {tchkNum},
+ &PdfParser::opSetTextLeading},
+ {"Tc", 1, {tchkNum},
+ &PdfParser::opSetCharSpacing},
+ {"Td", 2, {tchkNum, tchkNum},
+ &PdfParser::opTextMove},
+ {"Tf", 2, {tchkName, tchkNum},
+ &PdfParser::opSetFont},
+ {"Tj", 1, {tchkString},
+ &PdfParser::opShowText},
+ {"Tm", 6, {tchkNum, tchkNum, tchkNum, tchkNum,
+ tchkNum, tchkNum},
+ &PdfParser::opSetTextMatrix},
+ {"Tr", 1, {tchkInt},
+ &PdfParser::opSetTextRender},
+ {"Ts", 1, {tchkNum},
+ &PdfParser::opSetTextRise},
+ {"Tw", 1, {tchkNum},
+ &PdfParser::opSetWordSpacing},
+ {"Tz", 1, {tchkNum},
+ &PdfParser::opSetHorizScaling},
+ {"W", 0, {tchkNone},
+ &PdfParser::opClip},
+ {"W*", 0, {tchkNone},
+ &PdfParser::opEOClip},
+ {"b", 0, {tchkNone},
+ &PdfParser::opCloseFillStroke},
+ {"b*", 0, {tchkNone},
+ &PdfParser::opCloseEOFillStroke},
+ {"c", 6, {tchkNum, tchkNum, tchkNum, tchkNum,
+ tchkNum, tchkNum},
+ &PdfParser::opCurveTo},
+ {"cm", 6, {tchkNum, tchkNum, tchkNum, tchkNum,
+ tchkNum, tchkNum},
+ &PdfParser::opConcat},
+ {"cs", 1, {tchkName},
+ &PdfParser::opSetFillColorSpace},
+ {"d", 2, {tchkArray, tchkNum},
+ &PdfParser::opSetDash},
+ {"d0", 2, {tchkNum, tchkNum},
+ &PdfParser::opSetCharWidth},
+ {"d1", 6, {tchkNum, tchkNum, tchkNum, tchkNum,
+ tchkNum, tchkNum},
+ &PdfParser::opSetCacheDevice},
+ {"f", 0, {tchkNone},
+ &PdfParser::opFill},
+ {"f*", 0, {tchkNone},
+ &PdfParser::opEOFill},
+ {"g", 1, {tchkNum},
+ &PdfParser::opSetFillGray},
+ {"gs", 1, {tchkName},
+ &PdfParser::opSetExtGState},
+ {"h", 0, {tchkNone},
+ &PdfParser::opClosePath},
+ {"i", 1, {tchkNum},
+ &PdfParser::opSetFlat},
+ {"j", 1, {tchkInt},
+ &PdfParser::opSetLineJoin},
+ {"k", 4, {tchkNum, tchkNum, tchkNum, tchkNum},
+ &PdfParser::opSetFillCMYKColor},
+ {"l", 2, {tchkNum, tchkNum},
+ &PdfParser::opLineTo},
+ {"m", 2, {tchkNum, tchkNum},
+ &PdfParser::opMoveTo},
+ {"n", 0, {tchkNone},
+ &PdfParser::opEndPath},
+ {"q", 0, {tchkNone},
+ &PdfParser::opSave},
+ {"re", 4, {tchkNum, tchkNum, tchkNum, tchkNum},
+ &PdfParser::opRectangle},
+ {"rg", 3, {tchkNum, tchkNum, tchkNum},
+ &PdfParser::opSetFillRGBColor},
+ {"ri", 1, {tchkName},
+ &PdfParser::opSetRenderingIntent},
+ {"s", 0, {tchkNone},
+ &PdfParser::opCloseStroke},
+ {"sc", -4, {tchkNum, tchkNum, tchkNum, tchkNum},
+ &PdfParser::opSetFillColor},
+ {"scn", -33, {tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN, tchkSCN, tchkSCN, tchkSCN,
+ tchkSCN,},
+ &PdfParser::opSetFillColorN},
+ {"sh", 1, {tchkName},
+ &PdfParser::opShFill},
+ {"v", 4, {tchkNum, tchkNum, tchkNum, tchkNum},
+ &PdfParser::opCurveTo1},
+ {"w", 1, {tchkNum},
+ &PdfParser::opSetLineWidth},
+ {"y", 4, {tchkNum, tchkNum, tchkNum, tchkNum},
+ &PdfParser::opCurveTo2}
+};
+
+#define numOps (sizeof(opTab) / sizeof(PdfOperator))
+
+namespace {
+
+GfxPatch blankPatch()
+{
+ GfxPatch patch;
+ memset(&patch, 0, sizeof(patch)); // quick-n-dirty
+ return patch;
+}
+
+} // namespace
+
+//------------------------------------------------------------------------
+// PdfParser
+//------------------------------------------------------------------------
+
+PdfParser::PdfParser(std::shared_ptr<PDFDoc> pdf_doc, Inkscape::Extension::Internal::SvgBuilder *builderA, Page *page,
+ _POPPLER_CONST PDFRectangle *cropBox)
+ : _pdf_doc(pdf_doc)
+ , xref(pdf_doc->getXRef())
+ , builder(builderA)
+ , subPage(false)
+ , printCommands(false)
+ , res(new GfxResources(xref, page->getResourceDict(), nullptr))
+ , // start the resource stack
+ state(new GfxState(96.0, 96.0, page->getCropBox(), page->getRotate(), true))
+ , fontChanged(gFalse)
+ , clip(clipNone)
+ , ignoreUndef(0)
+ , formDepth(0)
+ , parser(nullptr)
+ , colorDeltas()
+ , maxDepths()
+ , operatorHistory(nullptr)
+{
+ setDefaultApproximationPrecision();
+ loadOptionalContentLayers(page->getResourceDict());
+ loadColorProfile();
+ baseMatrix = stateToAffine(state);
+
+ if (page) {
+ // Increment the page building here and set page label
+ Catalog *catalog = pdf_doc->getCatalog();
+ GooString *label = new GooString("");
+ catalog->indexToLabel(page->getNum() - 1, label);
+ builder->pushPage(label->getCString(), state);
+ }
+
+ // Must come after pushPage!
+ builder->setDocumentSize(state->getPageWidth(), state->getPageHeight());
+
+ // Set margins, bleeds and page-cropping
+ auto page_box = getRect(page->getCropBox());
+ auto scale = Geom::Scale(state->getPageWidth() / page_box.width(),
+ state->getPageHeight() / page_box.height());
+ builder->setMargins(getRect(page->getTrimBox()) * scale,
+ getRect(page->getArtBox()) * scale,
+ getRect(page->getBleedBox()) * scale);
+ if (cropBox && getRect(cropBox) != page_box) {
+ builder->cropPage(getRect(cropBox) * scale);
+ }
+
+ saveState();
+ formDepth = 0;
+
+ pushOperator("startPage");
+}
+
+PdfParser::PdfParser(XRef *xrefA, Inkscape::Extension::Internal::SvgBuilder *builderA, Dict *resDict,
+ _POPPLER_CONST PDFRectangle *box)
+ : xref(xrefA)
+ , builder(builderA)
+ , subPage(true)
+ , printCommands(false)
+ , res(new GfxResources(xref, resDict, nullptr))
+ , // start the resource stack
+ state(new GfxState(72, 72, box, 0, false))
+ , fontChanged(gFalse)
+ , clip(clipNone)
+ , ignoreUndef(0)
+ , formDepth(0)
+ , parser(nullptr)
+ , colorDeltas()
+ , maxDepths()
+ , operatorHistory(nullptr)
+{
+ setDefaultApproximationPrecision();
+ baseMatrix = stateToAffine(state);
+ formDepth = 0;
+}
+
+PdfParser::~PdfParser() {
+ while(operatorHistory) {
+ OpHistoryEntry *tmp = operatorHistory->next;
+ delete operatorHistory;
+ operatorHistory = tmp;
+ }
+
+ while (state && state->hasSaves()) {
+ restoreState();
+ }
+
+ if (!subPage) {
+ //out->endPage();
+ }
+
+ while (res) {
+ popResources();
+ }
+
+ if (state) {
+ delete state;
+ state = nullptr;
+ }
+}
+
+void PdfParser::parse(Object *obj, GBool topLevel) {
+ Object obj2;
+
+ if (obj->isArray()) {
+ for (int i = 0; i < obj->arrayGetLength(); ++i) {
+ _POPPLER_CALL_ARGS(obj2, obj->arrayGet, i);
+ if (!obj2.isStream()) {
+ error(errInternal, -1, "Weird page contents");
+ _POPPLER_FREE(obj2);
+ return;
+ }
+ _POPPLER_FREE(obj2);
+ }
+ } else if (!obj->isStream()) {
+ error(errInternal, -1, "Weird page contents");
+ return;
+ }
+ parser = new _POPPLER_NEW_PARSER(xref, obj);
+ go(topLevel);
+ delete parser;
+ parser = nullptr;
+}
+
+void PdfParser::go(GBool /*topLevel*/)
+{
+ Object obj;
+ Object args[maxArgs];
+
+ // scan a sequence of objects
+ int numArgs = 0;
+ _POPPLER_CALL(obj, parser->getObj);
+ while (!obj.isEOF()) {
+
+ // got a command - execute it
+ if (obj.isCmd()) {
+ if (printCommands) {
+ obj.print(stdout);
+ for (int i = 0; i < numArgs; ++i) {
+ printf(" ");
+ args[i].print(stdout);
+ }
+ printf("\n");
+ fflush(stdout);
+ }
+
+ // Run the operation
+ execOp(&obj, args, numArgs);
+
+#if !defined(POPPLER_NEW_OBJECT_API)
+ _POPPLER_FREE(obj);
+ for (int i = 0; i < numArgs; ++i)
+ _POPPLER_FREE(args[i]);
+#endif
+ numArgs = 0;
+
+ // got an argument - save it
+ } else if (numArgs < maxArgs) {
+ args[numArgs++] = std::move(obj);
+
+ // too many arguments - something is wrong
+ } else {
+ error(errSyntaxError, getPos(), "Too many args in content stream");
+ if (printCommands) {
+ printf("throwing away arg: ");
+ obj.print(stdout);
+ printf("\n");
+ fflush(stdout);
+ }
+ _POPPLER_FREE(obj);
+ }
+
+ // grab the next object
+ _POPPLER_CALL(obj, parser->getObj);
+ }
+ _POPPLER_FREE(obj);
+
+ // args at end with no command
+ if (numArgs > 0) {
+ error(errSyntaxError, getPos(), "Leftover args in content stream");
+ if (printCommands) {
+ printf("%d leftovers:", numArgs);
+ for (int i = 0; i < numArgs; ++i) {
+ printf(" ");
+ args[i].print(stdout);
+ }
+ printf("\n");
+ fflush(stdout);
+ }
+#if !defined(POPPLER_NEW_OBJECT_API)
+ for (int i = 0; i < numArgs; ++i)
+ _POPPLER_FREE(args[i]);
+#endif
+ }
+}
+
+void PdfParser::pushOperator(const char *name)
+{
+ OpHistoryEntry *newEntry = new OpHistoryEntry;
+ newEntry->name = name;
+ newEntry->state = nullptr;
+ newEntry->depth = (operatorHistory != nullptr ? (operatorHistory->depth+1) : 0);
+ newEntry->next = operatorHistory;
+ operatorHistory = newEntry;
+
+ // Truncate list if needed
+ if (operatorHistory->depth > maxOperatorHistoryDepth) {
+ OpHistoryEntry *curr = operatorHistory;
+ OpHistoryEntry *prev = nullptr;
+ while (curr && curr->next != nullptr) {
+ curr->depth--;
+ prev = curr;
+ curr = curr->next;
+ }
+ if (prev) {
+ if (curr->state != nullptr)
+ delete curr->state;
+ delete curr;
+ prev->next = nullptr;
+ }
+ }
+}
+
+const char *PdfParser::getPreviousOperator(unsigned int look_back) {
+ OpHistoryEntry *prev = nullptr;
+ if (operatorHistory != nullptr && look_back > 0) {
+ prev = operatorHistory->next;
+ while (--look_back > 0 && prev != nullptr) {
+ prev = prev->next;
+ }
+ }
+ if (prev != nullptr) {
+ return prev->name;
+ } else {
+ return "";
+ }
+}
+
+void PdfParser::execOp(Object *cmd, Object args[], int numArgs) {
+ PdfOperator *op;
+ const char *name;
+ Object *argPtr;
+ int i;
+
+ // find operator
+ name = cmd->getCmd();
+ if (!(op = findOp(name))) {
+ if (ignoreUndef == 0)
+ error(errSyntaxError, getPos(), "Unknown operator '{0:s}'", name);
+ return;
+ }
+
+ // type check args
+ argPtr = args;
+ if (op->numArgs >= 0) {
+ if (numArgs < op->numArgs) {
+ error(errSyntaxError, getPos(), "Too few ({0:d}) args to '{1:d}' operator", numArgs, name);
+ return;
+ }
+ if (numArgs > op->numArgs) {
+#if 0
+ error(errSyntaxError, getPos(), "Too many ({0:d}) args to '{1:s}' operator", numArgs, name);
+#endif
+ argPtr += numArgs - op->numArgs;
+ numArgs = op->numArgs;
+ }
+ } else {
+ if (numArgs > -op->numArgs) {
+ error(errSyntaxError, getPos(), "Too many ({0:d}) args to '{1:s}' operator",
+ numArgs, name);
+ return;
+ }
+ }
+ for (i = 0; i < numArgs; ++i) {
+ if (!checkArg(&argPtr[i], op->tchk[i])) {
+ error(errSyntaxError, getPos(), "Arg #{0:d} to '{1:s}' operator is wrong type ({2:s})",
+ i, name, argPtr[i].getTypeName());
+ return;
+ }
+ }
+
+ // add to history
+ pushOperator((char*)&op->name);
+
+ // do it
+ (this->*op->func)(argPtr, numArgs);
+}
+
+PdfOperator* PdfParser::findOp(const char *name) {
+ int a = -1;
+ int b = numOps;
+ int cmp = -1;
+ // invariant: opTab[a] < name < opTab[b]
+ while (b - a > 1) {
+ const int 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 nullptr;
+ }
+ return &opTab[a];
+}
+
+GBool PdfParser::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 PdfParser::getPos() {
+ return parser ? parser->getPos() : -1;
+}
+
+//------------------------------------------------------------------------
+// graphics state operators
+//------------------------------------------------------------------------
+
+void PdfParser::opSave(Object /*args*/[], int /*numArgs*/)
+{
+ saveState();
+}
+
+void PdfParser::opRestore(Object /*args*/[], int /*numArgs*/)
+{
+ restoreState();
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+/**
+ * Concatenate transformation matrix to the current state
+ */
+void PdfParser::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());
+ fontChanged = gTrue;
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetDash(Object args[], int /*numArgs*/)
+{
+ double *dash = nullptr;
+
+ Array *a = args[0].getArray();
+ int length = a->getLength();
+ if (length != 0) {
+ dash = (double *)gmallocn(length, sizeof(double));
+ for (int i = 0; i < length; ++i) {
+ Object obj;
+ dash[i] = _POPPLER_CALL_ARGS_DEREF(obj, a->get, i).getNum();
+ _POPPLER_FREE(obj);
+ }
+ }
+#if POPPLER_CHECK_VERSION(22, 9, 0)
+ state->setLineDash(std::vector<double> (dash, dash + length), args[1].getNum());
+#else
+ state->setLineDash(dash, length, args[1].getNum());
+#endif
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetFlat(Object args[], int /*numArgs*/)
+{
+ state->setFlatness((int)args[0].getNum());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetLineJoin(Object args[], int /*numArgs*/)
+{
+ state->setLineJoin(args[0].getInt());
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetLineCap(Object args[], int /*numArgs*/)
+{
+ state->setLineCap(args[0].getInt());
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetMiterLimit(Object args[], int /*numArgs*/)
+{
+ state->setMiterLimit(args[0].getNum());
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetLineWidth(Object args[], int /*numArgs*/)
+{
+ state->setLineWidth(args[0].getNum());
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetExtGState(Object args[], int /*numArgs*/)
+{
+ Object obj1, obj2, obj3, obj4, obj5;
+ Function *funcs[4] = {nullptr, nullptr, nullptr, nullptr};
+ GfxColor backdropColor;
+ GBool haveBackdropColor = gFalse;
+ GBool alpha = gFalse;
+
+ _POPPLER_CALL_ARGS(obj1, res->lookupGState, args[0].getName());
+ if (obj1.isNull()) {
+ return;
+ }
+ if (!obj1.isDict()) {
+ error(errSyntaxError, getPos(), "ExtGState '{0:s}' is wrong type"), args[0].getName();
+ _POPPLER_FREE(obj1);
+ return;
+ }
+ if (printCommands) {
+ printf(" gfx state dict: ");
+ obj1.print();
+ printf("\n");
+ }
+
+ // transparency support: blend mode, fill/stroke opacity
+ if (!_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "BM").isNull()) {
+ GfxBlendMode mode = gfxBlendNormal;
+ if (state->parseBlendMode(&obj2, &mode)) {
+ state->setBlendMode(mode);
+ } else {
+ error(errSyntaxError, getPos(), "Invalid blend mode in ExtGState");
+ }
+ }
+ _POPPLER_FREE(obj2);
+ if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "ca").isNum()) {
+ state->setFillOpacity(obj2.getNum());
+ }
+ _POPPLER_FREE(obj2);
+ if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "CA").isNum()) {
+ state->setStrokeOpacity(obj2.getNum());
+ }
+ _POPPLER_FREE(obj2);
+
+ // fill/stroke overprint
+ GBool haveFillOP = gFalse;
+ if ((haveFillOP = _POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "op").isBool())) {
+ state->setFillOverprint(obj2.getBool());
+ }
+ _POPPLER_FREE(obj2);
+ if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "OP").isBool()) {
+ state->setStrokeOverprint(obj2.getBool());
+ if (!haveFillOP) {
+ state->setFillOverprint(obj2.getBool());
+ }
+ }
+ _POPPLER_FREE(obj2);
+
+ // stroke adjust
+ if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "SA").isBool()) {
+ state->setStrokeAdjust(obj2.getBool());
+ }
+ _POPPLER_FREE(obj2);
+
+ // transfer function
+ if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "TR2").isNull()) {
+ _POPPLER_FREE(obj2);
+ _POPPLER_CALL_ARGS(obj2, obj1.dictLookup, "TR");
+ }
+ if (obj2.isName(const_cast<char*>("Default")) ||
+ obj2.isName(const_cast<char*>("Identity"))) {
+ funcs[0] = funcs[1] = funcs[2] = funcs[3] = nullptr;
+ state->setTransfer(funcs);
+ } else if (obj2.isArray() && obj2.arrayGetLength() == 4) {
+ int pos = 4;
+ for (int i = 0; i < 4; ++i) {
+ _POPPLER_CALL_ARGS(obj3, obj2.arrayGet, i);
+ funcs[i] = Function::parse(&obj3);
+ _POPPLER_FREE(obj3);
+ if (!funcs[i]) {
+ pos = i;
+ break;
+ }
+ }
+ if (pos == 4) {
+ state->setTransfer(funcs);
+ }
+ } else if (obj2.isName() || obj2.isDict() || obj2.isStream()) {
+ if ((funcs[0] = Function::parse(&obj2))) {
+ funcs[1] = funcs[2] = funcs[3] = nullptr;
+ state->setTransfer(funcs);
+ }
+ } else if (!obj2.isNull()) {
+ error(errSyntaxError, getPos(), "Invalid transfer function in ExtGState");
+ }
+ _POPPLER_FREE(obj2);
+
+ // soft mask
+ if (!_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "SMask").isNull()) {
+ if (obj2.isName(const_cast<char*>("None"))) {
+ // Do nothing.
+ } else if (obj2.isDict()) {
+ if (_POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "S").isName("Alpha")) {
+ alpha = gTrue;
+ } else { // "Luminosity"
+ alpha = gFalse;
+ }
+ _POPPLER_FREE(obj3);
+ funcs[0] = nullptr;
+ if (!_POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "TR").isNull()) {
+ funcs[0] = Function::parse(&obj3);
+ if (funcs[0]->getInputSize() != 1 ||
+ funcs[0]->getOutputSize() != 1) {
+ error(errSyntaxError, getPos(), "Invalid transfer function in soft mask in ExtGState");
+ delete funcs[0];
+ funcs[0] = nullptr;
+ }
+ }
+ _POPPLER_FREE(obj3);
+ if ((haveBackdropColor = _POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "BC").isArray())) {
+ for (int & i : backdropColor.c) {
+ i = 0;
+ }
+ for (int i = 0; i < obj3.arrayGetLength() && i < gfxColorMaxComps; ++i) {
+ _POPPLER_CALL_ARGS(obj4, obj3.arrayGet, i);
+ if (obj4.isNum()) {
+ backdropColor.c[i] = dblToCol(obj4.getNum());
+ }
+ _POPPLER_FREE(obj4);
+ }
+ }
+ _POPPLER_FREE(obj3);
+ if (_POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "G").isStream()) {
+ if (_POPPLER_CALL_ARGS_DEREF(obj4, obj3.streamGetDict()->lookup, "Group").isDict()) {
+ GfxColorSpace *blendingColorSpace = nullptr;
+ GBool isolated = gFalse;
+ GBool knockout = gFalse;
+ if (!_POPPLER_CALL_ARGS_DEREF(obj5, obj4.dictLookup, "CS").isNull()) {
+ blendingColorSpace = GfxColorSpace::parse(nullptr, &obj5, nullptr, state);
+ }
+ _POPPLER_FREE(obj5);
+ if (_POPPLER_CALL_ARGS_DEREF(obj5, obj4.dictLookup, "I").isBool()) {
+ isolated = obj5.getBool();
+ }
+ _POPPLER_FREE(obj5);
+ if (_POPPLER_CALL_ARGS_DEREF(obj5, obj4.dictLookup, "K").isBool()) {
+ knockout = obj5.getBool();
+ }
+ _POPPLER_FREE(obj5);
+ if (!haveBackdropColor) {
+ if (blendingColorSpace) {
+ blendingColorSpace->getDefaultColor(&backdropColor);
+ } else {
+ //~ need to get the parent or default color space (?)
+ for (int & i : backdropColor.c) {
+ i = 0;
+ }
+ }
+ }
+ doSoftMask(&obj3, alpha, blendingColorSpace,
+ isolated, knockout, funcs[0], &backdropColor);
+ if (funcs[0]) {
+ delete funcs[0];
+ }
+ } else {
+ error(errSyntaxError, getPos(), "Invalid soft mask in ExtGState - missing group");
+ }
+ _POPPLER_FREE(obj4);
+ } else {
+ error(errSyntaxError, getPos(), "Invalid soft mask in ExtGState - missing group");
+ }
+ _POPPLER_FREE(obj3);
+ } else if (!obj2.isNull()) {
+ error(errSyntaxError, getPos(), "Invalid soft mask in ExtGState");
+ }
+ }
+ _POPPLER_FREE(obj2);
+
+ _POPPLER_FREE(obj1);
+}
+
+void PdfParser::doSoftMask(Object *str, GBool alpha,
+ GfxColorSpace *blendingColorSpace,
+ GBool isolated, GBool knockout,
+ Function *transferFunc, GfxColor *backdropColor) {
+ Dict *dict, *resDict;
+ double m[6], bbox[4];
+ Object obj1, obj2;
+ int i;
+
+ // check for excessive recursion
+ if (formDepth > 20) {
+ return;
+ }
+
+ // get stream dict
+ dict = str->streamGetDict();
+
+ // check form type
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "FormType");
+ if (!(obj1.isNull() || (obj1.isInt() && obj1.getInt() == 1))) {
+ error(errSyntaxError, getPos(), "Unknown form type");
+ }
+ _POPPLER_FREE(obj1);
+
+ // get bounding box
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "BBox");
+ if (!obj1.isArray()) {
+ _POPPLER_FREE(obj1);
+ error(errSyntaxError, getPos(), "Bad form bounding box");
+ return;
+ }
+ for (i = 0; i < 4; ++i) {
+ _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, i);
+ bbox[i] = obj2.getNum();
+ _POPPLER_FREE(obj2);
+ }
+ _POPPLER_FREE(obj1);
+
+ // get matrix
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "Matrix");
+ if (obj1.isArray()) {
+ for (i = 0; i < 6; ++i) {
+ _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, i);
+ m[i] = obj2.getNum();
+ _POPPLER_FREE(obj2);
+ }
+ } else {
+ m[0] = 1; m[1] = 0;
+ m[2] = 0; m[3] = 1;
+ m[4] = 0; m[5] = 0;
+ }
+ _POPPLER_FREE(obj1);
+
+ // get resources
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "Resources");
+ resDict = obj1.isDict() ? obj1.getDict() : (Dict *)nullptr;
+
+ // draw it
+ ++formDepth;
+ doForm1(str, resDict, m, bbox, gTrue, gTrue,
+ blendingColorSpace, isolated, knockout,
+ alpha, transferFunc, backdropColor);
+ --formDepth;
+
+ if (blendingColorSpace) {
+ delete blendingColorSpace;
+ }
+ _POPPLER_FREE(obj1);
+}
+
+void PdfParser::opSetRenderingIntent(Object /*args*/[], int /*numArgs*/)
+{
+}
+
+//------------------------------------------------------------------------
+// color operators
+//------------------------------------------------------------------------
+
+/**
+ * Get a newly allocated color space instance by CS operation argument.
+ *
+ * Maintains a cache for named color spaces to avoid expensive re-parsing.
+ */
+GfxColorSpace *PdfParser::lookupColorSpaceCopy(Object &arg)
+{
+ assert(!arg.isNull());
+ GfxColorSpace *colorSpace = nullptr;
+
+ if (char const *name = arg.isName() ? arg.getName() : nullptr) {
+ auto cache_name = std::to_string(formDepth) + "-" + std::string(name);
+ if (colorSpace = colorSpacesCache[cache_name].get()) {
+ return colorSpace->copy();
+ }
+
+ Object obj = res->lookupColorSpace(name);
+ if (obj.isNull()) {
+ colorSpace = GfxColorSpace::parse(res, &arg, nullptr, state);
+ } else {
+ colorSpace = GfxColorSpace::parse(res, &obj, nullptr, state);
+ }
+
+ if (colorSpace && colorSpace->getMode() != csPattern) {
+ colorSpacesCache[cache_name].reset(colorSpace->copy());
+ }
+ } else {
+ // We were passed in an object directly.
+ colorSpace = GfxColorSpace::parse(res, &arg, nullptr, state);
+ }
+ return colorSpace;
+}
+
+/**
+ * Look up pattern/gradients from the GfxResource dictionary
+ */
+GfxPattern *PdfParser::lookupPattern(Object *obj, GfxState *state)
+{
+ if (!obj->isName())
+ return nullptr;
+ return res->lookupPattern(obj->getName(), nullptr, state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetFillGray(Object args[], int /*numArgs*/)
+{
+ GfxColor color;
+
+ state->setFillPattern(nullptr);
+ state->setFillColorSpace(new GfxDeviceGrayColorSpace());
+ color.c[0] = dblToCol(args[0].getNum());
+ state->setFillColor(&color);
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetStrokeGray(Object args[], int /*numArgs*/)
+{
+ GfxColor color;
+
+ state->setStrokePattern(nullptr);
+ state->setStrokeColorSpace(new GfxDeviceGrayColorSpace());
+ color.c[0] = dblToCol(args[0].getNum());
+ state->setStrokeColor(&color);
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetFillCMYKColor(Object args[], int /*numArgs*/)
+{
+ GfxColor color;
+ int i;
+
+ state->setFillPattern(nullptr);
+ state->setFillColorSpace(new GfxDeviceCMYKColorSpace());
+ for (i = 0; i < 4; ++i) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ state->setFillColor(&color);
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetStrokeCMYKColor(Object args[], int /*numArgs*/)
+{
+ GfxColor color;
+
+ state->setStrokePattern(nullptr);
+ state->setStrokeColorSpace(new GfxDeviceCMYKColorSpace());
+ for (int i = 0; i < 4; ++i) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ state->setStrokeColor(&color);
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetFillRGBColor(Object args[], int /*numArgs*/)
+{
+ GfxColor color;
+
+ state->setFillPattern(nullptr);
+ state->setFillColorSpace(new GfxDeviceRGBColorSpace());
+ for (int i = 0; i < 3; ++i) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ state->setFillColor(&color);
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetStrokeRGBColor(Object args[], int /*numArgs*/) {
+ GfxColor color;
+
+ state->setStrokePattern(nullptr);
+ state->setStrokeColorSpace(new GfxDeviceRGBColorSpace());
+ for (int i = 0; i < 3; ++i) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ state->setStrokeColor(&color);
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetFillColorSpace(Object args[], int numArgs)
+{
+ assert(numArgs >= 1);
+ GfxColorSpace *colorSpace = lookupColorSpaceCopy(args[0]);
+
+ state->setFillPattern(nullptr);
+
+ if (colorSpace) {
+ GfxColor color;
+ state->setFillColorSpace(colorSpace);
+ colorSpace->getDefaultColor(&color);
+ state->setFillColor(&color);
+ builder->updateStyle(state);
+ } else {
+ error(errSyntaxError, getPos(), "Bad color space (fill)");
+ }
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetStrokeColorSpace(Object args[], int numArgs)
+{
+ assert(numArgs >= 1);
+ GfxColorSpace *colorSpace = lookupColorSpaceCopy(args[0]);
+
+ state->setStrokePattern(nullptr);
+
+ if (colorSpace) {
+ GfxColor color;
+ state->setStrokeColorSpace(colorSpace);
+ colorSpace->getDefaultColor(&color);
+ state->setStrokeColor(&color);
+ builder->updateStyle(state);
+ } else {
+ error(errSyntaxError, getPos(), "Bad color space (stroke)");
+ }
+}
+
+void PdfParser::opSetFillColor(Object args[], int numArgs) {
+ GfxColor color;
+ int i;
+
+ if (numArgs != state->getFillColorSpace()->getNComps()) {
+ error(errSyntaxError, getPos(), "Incorrect number of arguments in 'sc' command");
+ return;
+ }
+ state->setFillPattern(nullptr);
+ for (i = 0; i < numArgs; ++i) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ state->setFillColor(&color);
+ builder->updateStyle(state);
+}
+
+void PdfParser::opSetStrokeColor(Object args[], int numArgs) {
+ GfxColor color;
+ int i;
+
+ if (numArgs != state->getStrokeColorSpace()->getNComps()) {
+ error(errSyntaxError, getPos(), "Incorrect number of arguments in 'SC' command");
+ return;
+ }
+ state->setStrokePattern(nullptr);
+ for (i = 0; i < numArgs; ++i) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ state->setStrokeColor(&color);
+ builder->updateStyle(state);
+}
+
+void PdfParser::opSetFillColorN(Object args[], int numArgs) {
+ GfxColor color;
+ int i;
+
+ if (state->getFillColorSpace()->getMode() == csPattern) {
+ if (numArgs > 1) {
+ if (!((GfxPatternColorSpace *)state->getFillColorSpace())->getUnder() ||
+ numArgs - 1 != ((GfxPatternColorSpace *)state->getFillColorSpace())
+ ->getUnder()->getNComps()) {
+ error(errSyntaxError, getPos(), "Incorrect number of arguments in 'scn' command");
+ return;
+ }
+ for (i = 0; i < numArgs - 1 && i < gfxColorMaxComps; ++i) {
+ if (args[i].isNum()) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ }
+ state->setFillColor(&color);
+ builder->updateStyle(state);
+ }
+ if (auto pattern = lookupPattern(&(args[numArgs - 1]), state)) {
+ state->setFillPattern(pattern);
+ builder->updateStyle(state);
+ }
+
+ } else {
+ if (numArgs != state->getFillColorSpace()->getNComps()) {
+ error(errSyntaxError, getPos(), "Incorrect number of arguments in 'scn' command");
+ return;
+ }
+ state->setFillPattern(nullptr);
+ for (i = 0; i < numArgs && i < gfxColorMaxComps; ++i) {
+ if (args[i].isNum()) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ }
+ state->setFillColor(&color);
+ builder->updateStyle(state);
+ }
+}
+
+void PdfParser::opSetStrokeColorN(Object args[], int numArgs) {
+ GfxColor color;
+ int i;
+
+ if (state->getStrokeColorSpace()->getMode() == csPattern) {
+ if (numArgs > 1) {
+ if (!((GfxPatternColorSpace *)state->getStrokeColorSpace())
+ ->getUnder() ||
+ numArgs - 1 != ((GfxPatternColorSpace *)state->getStrokeColorSpace())
+ ->getUnder()->getNComps()) {
+ error(errSyntaxError, getPos(), "Incorrect number of arguments in 'SCN' command");
+ return;
+ }
+ for (i = 0; i < numArgs - 1 && i < gfxColorMaxComps; ++i) {
+ if (args[i].isNum()) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ }
+ state->setStrokeColor(&color);
+ builder->updateStyle(state);
+ }
+ if (auto pattern = lookupPattern(&(args[numArgs - 1]), state)) {
+ state->setStrokePattern(pattern);
+ builder->updateStyle(state);
+ }
+
+ } else {
+ if (numArgs != state->getStrokeColorSpace()->getNComps()) {
+ error(errSyntaxError, getPos(), "Incorrect number of arguments in 'SCN' command");
+ return;
+ }
+ state->setStrokePattern(nullptr);
+ for (i = 0; i < numArgs && i < gfxColorMaxComps; ++i) {
+ if (args[i].isNum()) {
+ color.c[i] = dblToCol(args[i].getNum());
+ }
+ }
+ state->setStrokeColor(&color);
+ builder->updateStyle(state);
+ }
+}
+
+//------------------------------------------------------------------------
+// path segment operators
+//------------------------------------------------------------------------
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opMoveTo(Object args[], int /*numArgs*/)
+{
+ state->moveTo(args[0].getNum(), args[1].getNum());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opLineTo(Object args[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ error(errSyntaxError, getPos(), "No current point in lineto");
+ return;
+ }
+ state->lineTo(args[0].getNum(), args[1].getNum());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opCurveTo(Object args[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ error(errSyntaxError, getPos(), "No current point in curveto");
+ return;
+ }
+ double x1 = args[0].getNum();
+ double y1 = args[1].getNum();
+ double x2 = args[2].getNum();
+ double y2 = args[3].getNum();
+ double x3 = args[4].getNum();
+ double y3 = args[5].getNum();
+ state->curveTo(x1, y1, x2, y2, x3, y3);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opCurveTo1(Object args[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ error(errSyntaxError, getPos(), "No current point in curveto1");
+ return;
+ }
+ double x1 = state->getCurX();
+ double y1 = state->getCurY();
+ double x2 = args[0].getNum();
+ double y2 = args[1].getNum();
+ double x3 = args[2].getNum();
+ double y3 = args[3].getNum();
+ state->curveTo(x1, y1, x2, y2, x3, y3);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opCurveTo2(Object args[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ error(errSyntaxError, getPos(), "No current point in curveto2");
+ return;
+ }
+ double x1 = args[0].getNum();
+ double y1 = args[1].getNum();
+ double x2 = args[2].getNum();
+ double y2 = args[3].getNum();
+ double x3 = x2;
+ double y3 = y2;
+ state->curveTo(x1, y1, x2, y2, x3, y3);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opRectangle(Object args[], int /*numArgs*/)
+{
+ double x = args[0].getNum();
+ double y = args[1].getNum();
+ double w = args[2].getNum();
+ double 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 PdfParser::opClosePath(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ error(errSyntaxError, getPos(), "No current point in closepath");
+ return;
+ }
+ state->closePath();
+}
+
+//------------------------------------------------------------------------
+// path painting operators
+//------------------------------------------------------------------------
+
+void PdfParser::opEndPath(Object /*args*/[], int /*numArgs*/)
+{
+ doEndPath();
+}
+
+void PdfParser::opStroke(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in stroke"));
+ return;
+ }
+ if (state->isPath()) {
+ if (state->getStrokeColorSpace()->getMode() == csPattern &&
+ !builder->isPatternTypeSupported(state->getStrokePattern())) {
+ doPatternStrokeFallback();
+ } else {
+ builder->addPath(state, false, true);
+ }
+ }
+ doEndPath();
+}
+
+void PdfParser::opCloseStroke(Object * /*args[]*/, int /*numArgs*/) {
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in closepath/stroke"));
+ return;
+ }
+ state->closePath();
+ if (state->isPath()) {
+ if (state->getStrokeColorSpace()->getMode() == csPattern &&
+ !builder->isPatternTypeSupported(state->getStrokePattern())) {
+ doPatternStrokeFallback();
+ } else {
+ builder->addPath(state, false, true);
+ }
+ }
+ doEndPath();
+}
+
+void PdfParser::opFill(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in fill"));
+ return;
+ }
+ if (state->isPath()) {
+ if (state->getFillColorSpace()->getMode() == csPattern &&
+ !builder->isPatternTypeSupported(state->getFillPattern())) {
+ doPatternFillFallback(gFalse);
+ } else {
+ builder->addPath(state, true, false);
+ }
+ }
+ doEndPath();
+}
+
+void PdfParser::opEOFill(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in eofill"));
+ return;
+ }
+ if (state->isPath()) {
+ if (state->getFillColorSpace()->getMode() == csPattern &&
+ !builder->isPatternTypeSupported(state->getFillPattern())) {
+ doPatternFillFallback(gTrue);
+ } else {
+ builder->addPath(state, true, false, true);
+ }
+ }
+ doEndPath();
+}
+
+void PdfParser::opFillStroke(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in fill/stroke"));
+ return;
+ }
+ if (state->isPath()) {
+ doFillAndStroke(gFalse);
+ } else {
+ builder->addPath(state, true, true);
+ }
+ doEndPath();
+}
+
+void PdfParser::opCloseFillStroke(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in closepath/fill/stroke"));
+ return;
+ }
+ if (state->isPath()) {
+ state->closePath();
+ doFillAndStroke(gFalse);
+ }
+ doEndPath();
+}
+
+void PdfParser::opEOFillStroke(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in eofill/stroke"));
+ return;
+ }
+ if (state->isPath()) {
+ doFillAndStroke(gTrue);
+ }
+ doEndPath();
+}
+
+void PdfParser::opCloseEOFillStroke(Object /*args*/[], int /*numArgs*/)
+{
+ if (!state->isCurPt()) {
+ //error(getPos(), const_cast<char*>("No path in closepath/eofill/stroke"));
+ return;
+ }
+ if (state->isPath()) {
+ state->closePath();
+ doFillAndStroke(gTrue);
+ }
+ doEndPath();
+}
+
+void PdfParser::doFillAndStroke(GBool eoFill) {
+ GBool fillOk = gTrue, strokeOk = gTrue;
+ if (state->getFillColorSpace()->getMode() == csPattern &&
+ !builder->isPatternTypeSupported(state->getFillPattern())) {
+ fillOk = gFalse;
+ }
+ if (state->getStrokeColorSpace()->getMode() == csPattern &&
+ !builder->isPatternTypeSupported(state->getStrokePattern())) {
+ strokeOk = gFalse;
+ }
+ if (fillOk && strokeOk) {
+ builder->addPath(state, true, true, eoFill);
+ } else {
+ doPatternFillFallback(eoFill);
+ doPatternStrokeFallback();
+ }
+}
+
+void PdfParser::doPatternFillFallback(GBool eoFill) {
+ GfxPattern *pattern;
+
+ if (!(pattern = state->getFillPattern())) {
+ return;
+ }
+ switch (pattern->getType()) {
+ case 1:
+ break;
+ case 2:
+ doShadingPatternFillFallback(static_cast<GfxShadingPattern *>(pattern), gFalse, eoFill);
+ break;
+ default:
+ error(errUnimplemented, getPos(), "Unimplemented pattern type (%d) in fill",
+ pattern->getType());
+ break;
+ }
+}
+
+void PdfParser::doPatternStrokeFallback() {
+ GfxPattern *pattern;
+
+ if (!(pattern = state->getStrokePattern())) {
+ return;
+ }
+ switch (pattern->getType()) {
+ case 1:
+ break;
+ case 2:
+ doShadingPatternFillFallback(static_cast<GfxShadingPattern *>(pattern), gTrue, gFalse);
+ break;
+ default:
+ error(errUnimplemented, getPos(), "Unimplemented pattern type ({0:d}) in stroke",
+ pattern->getType());
+ break;
+ }
+}
+
+void PdfParser::doShadingPatternFillFallback(GfxShadingPattern *sPat,
+ GBool stroke, GBool eoFill) {
+ GfxShading *shading;
+ GfxPath *savedPath;
+
+ shading = sPat->getShading();
+
+ // save current graphics state
+ savedPath = state->getPath()->copy();
+ saveState();
+
+ // clip to bbox
+ /*if (false ){//shading->getHasBBox()) {
+ double xMin, yMin, xMax, yMax;
+ 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();
+ state->setPath(savedPath->copy());
+ }*/
+
+ // clip to current path
+ if (stroke) {
+ state->clipToStrokePath();
+ } else {
+ state->clip();
+ // XXX WARNING WE HAVE REMOVED THE SET CLIP
+ /*if (eoFill) {
+ builder->setClipPath(state, true);
+ } else {
+ builder->setClipPath(state);
+ }*/
+ }
+
+ // set the color space
+ state->setFillColorSpace(shading->getColorSpace()->copy());
+
+ // background color fill
+ if (shading->getHasBackground()) {
+ state->setFillColor(shading->getBackground());
+ builder->addPath(state, true, false);
+ }
+ state->clearPath();
+
+ // construct a (pattern space) -> (current space) transform matrix
+ auto ptr = ctmToAffine(sPat->getMatrix());
+ auto m = (ptr * baseMatrix) * stateToAffine(state).inverse();
+
+ // Set the new matrix
+ state->concatCTM(m[0], m[1], m[2], m[3], m[4], m[5]);
+
+ // do shading type-specific operations
+ switch (shading->getType()) {
+ case 1:
+ doFunctionShFill(static_cast<GfxFunctionShading *>(shading));
+ break;
+ case 2:
+ case 3:
+ // no need to implement these
+ break;
+ case 4:
+ case 5:
+ doGouraudTriangleShFill(static_cast<GfxGouraudTriangleShading *>(shading));
+ break;
+ case 6:
+ case 7:
+ doPatchMeshShFill(static_cast<GfxPatchMeshShading *>(shading));
+ break;
+ }
+
+ // restore graphics state
+ restoreState();
+ state->setPath(savedPath);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opShFill(Object args[], int /*numArgs*/)
+{
+ GfxShading *shading = nullptr;
+ GfxPath *savedPath = nullptr;
+ bool savedState = false;
+
+ if (!(shading = res->lookupShading(args[0].getName(), nullptr, state))) {
+ return;
+ }
+
+ // save current graphics state
+ if (shading->getType() != 2 && shading->getType() != 3) {
+ savedPath = state->getPath()->copy();
+ saveState();
+ savedState = true;
+ }
+
+ // clip to bbox
+ /*if (shading->getHasBBox()) {
+ double xMin, yMin, xMax, yMax;
+ 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();
+ builder->setClip(state);
+ state->clearPath();
+ }*/
+
+ // set the color space
+ if (savedState)
+ state->setFillColorSpace(shading->getColorSpace()->copy());
+
+ // do shading type-specific operations
+ switch (shading->getType()) {
+ case 1: // Function-based shading
+ doFunctionShFill(static_cast<GfxFunctionShading *>(shading));
+ break;
+ case 2: // Axial shading
+ case 3: // Radial shading
+ builder->addClippedFill(shading, stateToAffine(state));
+ break;
+ case 4: // Free-form Gouraud-shaded triangle mesh
+ case 5: // Lattice-form Gouraud-shaded triangle mesh
+ doGouraudTriangleShFill(static_cast<GfxGouraudTriangleShading *>(shading));
+ break;
+ case 6: // Coons patch mesh
+ case 7: // Tensor-product patch mesh
+ doPatchMeshShFill(static_cast<GfxPatchMeshShading *>(shading));
+ break;
+ }
+
+ // restore graphics state
+ if (savedState) {
+ restoreState();
+ state->setPath(savedPath);
+ }
+
+ delete shading;
+}
+
+void PdfParser::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 PdfParser::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 functionColorDelta = colorDeltas[pdfFunctionShading-1];
+ const double *matrix;
+ double xM, yM;
+ int nComps, i, j;
+
+ nComps = shading->getColorSpace()->getNComps();
+ matrix = shading->getMatrix();
+
+ // compare the four corner colors
+ for (i = 0; i < 4; ++i) {
+ for (j = 0; j < nComps; ++j) {
+ if (abs(colors[i].c[j] - colors[(i+1)&3].c[j]) > functionColorDelta) {
+ break;
+ }
+ }
+ if (j < nComps) {
+ break;
+ }
+ }
+
+ // center of the rectangle
+ xM = 0.5 * (x0 + x1);
+ yM = 0.5 * (y0 + y1);
+
+ // the four corner colors are close (or we hit the recursive limit)
+ // -- fill the rectangle; but require at least one subdivision
+ // (depth==0) to avoid problems when the four outer corners of the
+ // shaded region are the same color
+ if ((i == 4 && depth > 0) || depth == maxDepths[pdfFunctionShading-1]) {
+
+ // use the center color
+ shading->getColor(xM, yM, &fillColor);
+ state->setFillColor(&fillColor);
+
+ // 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();
+ builder->addPath(state, true, false);
+ 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 PdfParser::doGouraudTriangleShFill(GfxGouraudTriangleShading *shading) {
+ double x0, y0, x1, y1, x2, y2;
+ GfxColor color0, color1, color2;
+ int i;
+
+ for (i = 0; i < shading->getNTriangles(); ++i) {
+ shading->getTriangle(i, &x0, &y0, &color0,
+ &x1, &y1, &color1,
+ &x2, &y2, &color2);
+ gouraudFillTriangle(x0, y0, &color0, x1, y1, &color1, x2, y2, &color2,
+ shading->getColorSpace()->getNComps(), 0);
+ }
+}
+
+void PdfParser::gouraudFillTriangle(double x0, double y0, GfxColor *color0,
+ double x1, double y1, GfxColor *color1,
+ double x2, double y2, GfxColor *color2,
+ int nComps, int depth) {
+ double x01, y01, x12, y12, x20, y20;
+ double gouraudColorDelta = colorDeltas[pdfGouraudTriangleShading-1];
+ GfxColor color01, color12, color20;
+ int i;
+
+ for (i = 0; i < nComps; ++i) {
+ if (abs(color0->c[i] - color1->c[i]) > gouraudColorDelta ||
+ abs(color1->c[i] - color2->c[i]) > gouraudColorDelta) {
+ break;
+ }
+ }
+ if (i == nComps || depth == maxDepths[pdfGouraudTriangleShading-1]) {
+ state->setFillColor(color0);
+ state->moveTo(x0, y0);
+ state->lineTo(x1, y1);
+ state->lineTo(x2, y2);
+ state->closePath();
+ builder->addPath(state, true, false);
+ state->clearPath();
+ } else {
+ x01 = 0.5 * (x0 + x1);
+ y01 = 0.5 * (y0 + y1);
+ x12 = 0.5 * (x1 + x2);
+ y12 = 0.5 * (y1 + y2);
+ x20 = 0.5 * (x2 + x0);
+ y20 = 0.5 * (y2 + y0);
+ //~ if the shading has a Function, this should interpolate on the
+ //~ function parameter, not on the color components
+ for (i = 0; i < nComps; ++i) {
+ color01.c[i] = (color0->c[i] + color1->c[i]) / 2;
+ color12.c[i] = (color1->c[i] + color2->c[i]) / 2;
+ color20.c[i] = (color2->c[i] + color0->c[i]) / 2;
+ }
+ gouraudFillTriangle(x0, y0, color0, x01, y01, &color01,
+ x20, y20, &color20, nComps, depth + 1);
+ gouraudFillTriangle(x01, y01, &color01, x1, y1, color1,
+ x12, y12, &color12, nComps, depth + 1);
+ gouraudFillTriangle(x01, y01, &color01, x12, y12, &color12,
+ x20, y20, &color20, nComps, depth + 1);
+ gouraudFillTriangle(x20, y20, &color20, x12, y12, &color12,
+ x2, y2, color2, nComps, depth + 1);
+ }
+}
+
+void PdfParser::doPatchMeshShFill(GfxPatchMeshShading *shading) {
+ int start, i;
+
+ if (shading->getNPatches() > 128) {
+ start = 3;
+ } else if (shading->getNPatches() > 64) {
+ start = 2;
+ } else if (shading->getNPatches() > 16) {
+ start = 1;
+ } else {
+ start = 0;
+ }
+ for (i = 0; i < shading->getNPatches(); ++i) {
+ fillPatch(shading->getPatch(i), shading->getColorSpace()->getNComps(),
+ start);
+ }
+}
+
+void PdfParser::fillPatch(_POPPLER_CONST GfxPatch *patch, int nComps, int depth) {
+ GfxPatch patch00 = blankPatch();
+ GfxPatch patch01 = blankPatch();
+ GfxPatch patch10 = blankPatch();
+ GfxPatch patch11 = blankPatch();
+ GfxColor color = {{0}};
+ double xx[4][8];
+ double yy[4][8];
+ double xxm;
+ double yym;
+ double patchColorDelta = colorDeltas[pdfPatchMeshShading - 1];
+
+ int i;
+
+ for (i = 0; i < nComps; ++i) {
+ if (std::abs(patch->color[0][0].c[i] - patch->color[0][1].c[i])
+ > patchColorDelta ||
+ std::abs(patch->color[0][1].c[i] - patch->color[1][1].c[i])
+ > patchColorDelta ||
+ std::abs(patch->color[1][1].c[i] - patch->color[1][0].c[i])
+ > patchColorDelta ||
+ std::abs(patch->color[1][0].c[i] - patch->color[0][0].c[i])
+ > patchColorDelta) {
+ break;
+ }
+ color.c[i] = GfxColorComp(patch->color[0][0].c[i]);
+ }
+ if (i == nComps || depth == maxDepths[pdfPatchMeshShading-1]) {
+ state->setFillColor(&color);
+ state->moveTo(patch->x[0][0], patch->y[0][0]);
+ state->curveTo(patch->x[0][1], patch->y[0][1],
+ patch->x[0][2], patch->y[0][2],
+ patch->x[0][3], patch->y[0][3]);
+ state->curveTo(patch->x[1][3], patch->y[1][3],
+ patch->x[2][3], patch->y[2][3],
+ patch->x[3][3], patch->y[3][3]);
+ state->curveTo(patch->x[3][2], patch->y[3][2],
+ patch->x[3][1], patch->y[3][1],
+ patch->x[3][0], patch->y[3][0]);
+ state->curveTo(patch->x[2][0], patch->y[2][0],
+ patch->x[1][0], patch->y[1][0],
+ patch->x[0][0], patch->y[0][0]);
+ state->closePath();
+ builder->addPath(state, true, false);
+ state->clearPath();
+ } else {
+ for (i = 0; i < 4; ++i) {
+ xx[i][0] = patch->x[i][0];
+ yy[i][0] = patch->y[i][0];
+ xx[i][1] = 0.5 * (patch->x[i][0] + patch->x[i][1]);
+ yy[i][1] = 0.5 * (patch->y[i][0] + patch->y[i][1]);
+ xxm = 0.5 * (patch->x[i][1] + patch->x[i][2]);
+ yym = 0.5 * (patch->y[i][1] + patch->y[i][2]);
+ xx[i][6] = 0.5 * (patch->x[i][2] + patch->x[i][3]);
+ yy[i][6] = 0.5 * (patch->y[i][2] + patch->y[i][3]);
+ xx[i][2] = 0.5 * (xx[i][1] + xxm);
+ yy[i][2] = 0.5 * (yy[i][1] + yym);
+ xx[i][5] = 0.5 * (xxm + xx[i][6]);
+ yy[i][5] = 0.5 * (yym + yy[i][6]);
+ xx[i][3] = xx[i][4] = 0.5 * (xx[i][2] + xx[i][5]);
+ yy[i][3] = yy[i][4] = 0.5 * (yy[i][2] + yy[i][5]);
+ xx[i][7] = patch->x[i][3];
+ yy[i][7] = patch->y[i][3];
+ }
+ for (i = 0; i < 4; ++i) {
+ patch00.x[0][i] = xx[0][i];
+ patch00.y[0][i] = yy[0][i];
+ patch00.x[1][i] = 0.5 * (xx[0][i] + xx[1][i]);
+ patch00.y[1][i] = 0.5 * (yy[0][i] + yy[1][i]);
+ xxm = 0.5 * (xx[1][i] + xx[2][i]);
+ yym = 0.5 * (yy[1][i] + yy[2][i]);
+ patch10.x[2][i] = 0.5 * (xx[2][i] + xx[3][i]);
+ patch10.y[2][i] = 0.5 * (yy[2][i] + yy[3][i]);
+ patch00.x[2][i] = 0.5 * (patch00.x[1][i] + xxm);
+ patch00.y[2][i] = 0.5 * (patch00.y[1][i] + yym);
+ patch10.x[1][i] = 0.5 * (xxm + patch10.x[2][i]);
+ patch10.y[1][i] = 0.5 * (yym + patch10.y[2][i]);
+ patch00.x[3][i] = 0.5 * (patch00.x[2][i] + patch10.x[1][i]);
+ patch00.y[3][i] = 0.5 * (patch00.y[2][i] + patch10.y[1][i]);
+ patch10.x[0][i] = patch00.x[3][i];
+ patch10.y[0][i] = patch00.y[3][i];
+ patch10.x[3][i] = xx[3][i];
+ patch10.y[3][i] = yy[3][i];
+ }
+ for (i = 4; i < 8; ++i) {
+ patch01.x[0][i-4] = xx[0][i];
+ patch01.y[0][i-4] = yy[0][i];
+ patch01.x[1][i-4] = 0.5 * (xx[0][i] + xx[1][i]);
+ patch01.y[1][i-4] = 0.5 * (yy[0][i] + yy[1][i]);
+ xxm = 0.5 * (xx[1][i] + xx[2][i]);
+ yym = 0.5 * (yy[1][i] + yy[2][i]);
+ patch11.x[2][i-4] = 0.5 * (xx[2][i] + xx[3][i]);
+ patch11.y[2][i-4] = 0.5 * (yy[2][i] + yy[3][i]);
+ patch01.x[2][i-4] = 0.5 * (patch01.x[1][i-4] + xxm);
+ patch01.y[2][i-4] = 0.5 * (patch01.y[1][i-4] + yym);
+ patch11.x[1][i-4] = 0.5 * (xxm + patch11.x[2][i-4]);
+ patch11.y[1][i-4] = 0.5 * (yym + patch11.y[2][i-4]);
+ patch01.x[3][i-4] = 0.5 * (patch01.x[2][i-4] + patch11.x[1][i-4]);
+ patch01.y[3][i-4] = 0.5 * (patch01.y[2][i-4] + patch11.y[1][i-4]);
+ patch11.x[0][i-4] = patch01.x[3][i-4];
+ patch11.y[0][i-4] = patch01.y[3][i-4];
+ patch11.x[3][i-4] = xx[3][i];
+ patch11.y[3][i-4] = yy[3][i];
+ }
+ //~ if the shading has a Function, this should interpolate on the
+ //~ function parameter, not on the color components
+ for (i = 0; i < nComps; ++i) {
+ patch00.color[0][0].c[i] = patch->color[0][0].c[i];
+ patch00.color[0][1].c[i] = (patch->color[0][0].c[i] +
+ patch->color[0][1].c[i]) / 2;
+ patch01.color[0][0].c[i] = patch00.color[0][1].c[i];
+ patch01.color[0][1].c[i] = patch->color[0][1].c[i];
+ patch01.color[1][1].c[i] = (patch->color[0][1].c[i] +
+ patch->color[1][1].c[i]) / 2;
+ patch11.color[0][1].c[i] = patch01.color[1][1].c[i];
+ patch11.color[1][1].c[i] = patch->color[1][1].c[i];
+ patch11.color[1][0].c[i] = (patch->color[1][1].c[i] +
+ patch->color[1][0].c[i]) / 2;
+ patch10.color[1][1].c[i] = patch11.color[1][0].c[i];
+ patch10.color[1][0].c[i] = patch->color[1][0].c[i];
+ patch10.color[0][0].c[i] = (patch->color[1][0].c[i] +
+ patch->color[0][0].c[i]) / 2;
+ patch00.color[1][0].c[i] = patch10.color[0][0].c[i];
+ patch00.color[1][1].c[i] = (patch00.color[1][0].c[i] +
+ patch01.color[1][1].c[i]) / 2;
+ patch01.color[1][0].c[i] = patch00.color[1][1].c[i];
+ patch11.color[0][0].c[i] = patch00.color[1][1].c[i];
+ patch10.color[0][1].c[i] = patch00.color[1][1].c[i];
+ }
+ fillPatch(&patch00, nComps, depth + 1);
+ fillPatch(&patch10, nComps, depth + 1);
+ fillPatch(&patch01, nComps, depth + 1);
+ fillPatch(&patch11, nComps, depth + 1);
+ }
+}
+
+void PdfParser::doEndPath() {
+ if (state->isCurPt() && clip != clipNone) {
+ state->clip();
+ builder->setClip(state, clip);
+ clip = clipNone;
+ }
+ state->clearPath();
+}
+
+//------------------------------------------------------------------------
+// path clipping operators
+//------------------------------------------------------------------------
+
+void PdfParser::opClip(Object /*args*/[], int /*numArgs*/)
+{
+ clip = clipNormal;
+}
+
+void PdfParser::opEOClip(Object /*args*/[], int /*numArgs*/)
+{
+ clip = clipEO;
+}
+
+//------------------------------------------------------------------------
+// text object operators
+//------------------------------------------------------------------------
+
+void PdfParser::opBeginText(Object /*args*/[], int /*numArgs*/)
+{
+ state->setTextMat(1, 0, 0, 1, 0, 0);
+ state->textMoveTo(0, 0);
+ builder->updateTextPosition(0.0, 0.0);
+ fontChanged = gTrue;
+ builder->beginTextObject(state);
+}
+
+void PdfParser::opEndText(Object /*args*/[], int /*numArgs*/)
+{
+ builder->endTextObject(state);
+}
+
+//------------------------------------------------------------------------
+// text state operators
+//------------------------------------------------------------------------
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetCharSpacing(Object args[], int /*numArgs*/)
+{
+ state->setCharSpace(args[0].getNum());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetFont(Object args[], int /*numArgs*/)
+{
+ auto font = res->lookupFont(args[0].getName());
+
+ if (!font) {
+ // unsetting the font (drawing no text) is better than using the
+ // previous one and drawing random glyphs from it
+ state->setFont(nullptr, args[1].getNum());
+ fontChanged = gTrue;
+ return;
+ }
+ if (printCommands) {
+ printf(" font: tag=%s name='%s' %g\n",
+#if POPPLER_CHECK_VERSION(21,11,0)
+ font->getTag().c_str(),
+#else
+ font->getTag()->getCString(),
+#endif
+ font->getName() ? font->getName()->getCString() : "???",
+ args[1].getNum());
+ fflush(stdout);
+ }
+
+#if !POPPLER_CHECK_VERSION(22, 4, 0)
+ font->incRefCnt();
+#endif
+ state->setFont(font, args[1].getNum());
+ fontChanged = gTrue;
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetTextLeading(Object args[], int /*numArgs*/)
+{
+ state->setLeading(args[0].getNum());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetTextRender(Object args[], int /*numArgs*/)
+{
+ state->setRender(args[0].getInt());
+ builder->updateStyle(state);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetTextRise(Object args[], int /*numArgs*/)
+{
+ state->setRise(args[0].getNum());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetWordSpacing(Object args[], int /*numArgs*/)
+{
+ state->setWordSpace(args[0].getNum());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opSetHorizScaling(Object args[], int /*numArgs*/)
+{
+ state->setHorizScaling(args[0].getNum());
+ builder->updateTextMatrix(state, !subPage);
+ fontChanged = gTrue;
+}
+
+//------------------------------------------------------------------------
+// text positioning operators
+//------------------------------------------------------------------------
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opTextMove(Object args[], int /*numArgs*/)
+{
+ double tx, ty;
+
+ tx = state->getLineX() + args[0].getNum();
+ ty = state->getLineY() + args[1].getNum();
+ state->textMoveTo(tx, ty);
+ builder->updateTextPosition(tx, ty);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::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);
+ builder->updateTextPosition(tx, ty);
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::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);
+ builder->updateTextMatrix(state, !subPage);
+ builder->updateTextPosition(0.0, 0.0);
+ fontChanged = gTrue;
+}
+
+void PdfParser::opTextNextLine(Object /*args*/[], int /*numArgs*/)
+{
+ double tx, ty;
+
+ tx = state->getLineX();
+ ty = state->getLineY() - state->getLeading();
+ state->textMoveTo(tx, ty);
+ builder->updateTextPosition(tx, ty);
+}
+
+//------------------------------------------------------------------------
+// text string operators
+//------------------------------------------------------------------------
+
+void PdfParser::doUpdateFont()
+{
+ if (fontChanged) {
+ auto font = getFontEngine()->getFont(state->getFont(), _pdf_doc.get(), true, xref);
+ builder->updateFont(state, font, !subPage);
+ fontChanged = false;
+ }
+}
+
+std::shared_ptr<CairoFontEngine> PdfParser::getFontEngine()
+{
+ // poppler/CairoOutputDev.cc claims the FT Library needs to be kept around
+ // for a while. It's unclear if this is sure for our case.
+ static FT_Library ft_lib;
+ static std::once_flag ft_lib_once_flag;
+ std::call_once(ft_lib_once_flag, FT_Init_FreeType, &ft_lib);
+ if (!_font_engine) {
+ // This will make a new font engine per form1, in the future we could
+ // share this between PdfParser instances for the same PDF file.
+ _font_engine = std::make_shared<CairoFontEngine>(ft_lib);
+ }
+ return _font_engine;
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opShowText(Object args[], int /*numArgs*/)
+{
+ if (!state->getFont()) {
+ error(errSyntaxError, getPos(), "No font in show");
+ return;
+ }
+ doUpdateFont();
+ doShowText(args[0].getString());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opMoveShowText(Object args[], int /*numArgs*/)
+{
+ double tx = 0;
+ double ty = 0;
+
+ if (!state->getFont()) {
+ error(errSyntaxError, getPos(), "No font in move/show");
+ return;
+ }
+ doUpdateFont();
+ tx = state->getLineX();
+ ty = state->getLineY() - state->getLeading();
+ state->textMoveTo(tx, ty);
+ builder->updateTextPosition(tx, ty);
+ doShowText(args[0].getString());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opMoveSetShowText(Object args[], int /*numArgs*/)
+{
+ double tx = 0;
+ double ty = 0;
+
+ if (!state->getFont()) {
+ error(errSyntaxError, getPos(), "No font in move/set/show");
+ return;
+ }
+ doUpdateFont();
+ state->setWordSpace(args[0].getNum());
+ state->setCharSpace(args[1].getNum());
+ tx = state->getLineX();
+ ty = state->getLineY() - state->getLeading();
+ state->textMoveTo(tx, ty);
+ builder->updateTextPosition(tx, ty);
+ doShowText(args[2].getString());
+}
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opShowSpaceText(Object args[], int /*numArgs*/)
+{
+ Array *a = nullptr;
+ Object obj;
+ int wMode = 0;
+
+ if (!state->getFont()) {
+ error(errSyntaxError, getPos(), "No font in show/space");
+ return;
+ }
+ doUpdateFont();
+ wMode = state->getFont()->getWMode();
+ a = args[0].getArray();
+ for (int i = 0; i < a->getLength(); ++i) {
+ _POPPLER_CALL_ARGS(obj, a->get, i);
+ if (obj.isNum()) {
+ // this uses the absolute value of the font size to match
+ // Acrobat's behavior
+ if (wMode) {
+ state->textShift(0, -obj.getNum() * 0.001 *
+ fabs(state->getFontSize()));
+ } else {
+ state->textShift(-obj.getNum() * 0.001 *
+ fabs(state->getFontSize()), 0);
+ }
+ builder->updateTextShift(state, obj.getNum());
+ } else if (obj.isString()) {
+ doShowText(obj.getString());
+ } else {
+ error(errSyntaxError, getPos(), "Element of show/space array must be number or string");
+ }
+ _POPPLER_FREE(obj);
+ }
+}
+
+#if POPPLER_CHECK_VERSION(0,64,0)
+void PdfParser::doShowText(const GooString *s) {
+#else
+void PdfParser::doShowText(GooString *s) {
+#endif
+ int wMode;
+ double riseX, riseY;
+ CharCode code;
+ Unicode _POPPLER_CONST_82 *u = nullptr;
+ double dx, dy, tdx, tdy;
+ double originX, originY, tOriginX, tOriginY;
+ Object charProc;
+#if POPPLER_CHECK_VERSION(0,64,0)
+ const char *p;
+#else
+ char *p;
+#endif
+ int len, n, uLen;
+
+ auto font = state->getFont();
+ wMode = font->getWMode();
+
+ builder->beginString(state, s->getLength());
+
+ // handle a Type 3 char
+ if (font->getType() == fontType3) {
+ g_warning("PDF fontType3 information ignored.");
+ }
+
+ state->textTransformDelta(0, state->getRise(), &riseX, &riseY);
+ p = s->getCString();
+ len = s->getLength();
+ while (len > 0) {
+ /* TODO: This looks like a memory leak for u. */
+ n = font->getNextChar(p, len, &code, &u, &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);
+ // In Gfx.cc this is drawChar(...)
+ builder->addChar(state, state->getCurX() + riseX, state->getCurY() + riseY, dx, dy, tOriginX, tOriginY, code, n,
+ u, uLen);
+ state->shift(tdx, tdy);
+ p += n;
+ len -= n;
+ }
+ builder->endString(state);
+}
+
+
+//------------------------------------------------------------------------
+// XObject operators
+//------------------------------------------------------------------------
+
+// TODO not good that numArgs is ignored but args[] is used:
+void PdfParser::opXObject(Object args[], int /*numArgs*/)
+{
+ Object obj1, obj2, obj3, refObj;
+
+#if POPPLER_CHECK_VERSION(0,64,0)
+ const char *name = args[0].getName();
+#else
+ char *name = args[0].getName();
+#endif
+ _POPPLER_CALL_ARGS(obj1, res->lookupXObject, name);
+ if (obj1.isNull()) {
+ return;
+ }
+ if (!obj1.isStream()) {
+ error(errSyntaxError, getPos(), "XObject '{0:s}' is wrong type", name);
+ _POPPLER_FREE(obj1);
+ return;
+ }
+ _POPPLER_CALL_ARGS(obj2, obj1.streamGetDict()->lookup, "Subtype");
+ if (obj2.isName(const_cast<char*>("Image"))) {
+ _POPPLER_CALL_ARGS(refObj, res->lookupXObjectNF, name);
+ doImage(&refObj, obj1.getStream(), gFalse);
+ _POPPLER_FREE(refObj);
+ } else if (obj2.isName(const_cast<char*>("Form"))) {
+ doForm(&obj1);
+ } else if (obj2.isName(const_cast<char*>("PS"))) {
+ _POPPLER_CALL_ARGS(obj3, obj1.streamGetDict()->lookup, "Level1");
+/* out->psXObject(obj1.getStream(),
+ obj3.isStream() ? obj3.getStream() : (Stream *)NULL);*/
+ } else if (obj2.isName()) {
+ error(errSyntaxError, getPos(), "Unknown XObject subtype '{0:s}'", obj2.getName());
+ } else {
+ error(errSyntaxError, getPos(), "XObject subtype is missing or wrong type");
+ }
+ _POPPLER_FREE(obj2);
+ _POPPLER_FREE(obj1);
+}
+
+void PdfParser::doImage(Object * /*ref*/, Stream *str, GBool inlineImg)
+{
+ Dict *dict;
+ int width, height;
+ int bits;
+ GBool interpolate;
+ StreamColorSpaceMode csMode;
+ GBool mask;
+ GBool invert;
+ Object maskObj, smaskObj;
+ GBool haveColorKeyMask, haveExplicitMask, haveSoftMask;
+ GBool maskInvert;
+ GBool maskInterpolate;
+ Object obj1, obj2;
+
+ // get info from the stream
+ bits = 0;
+ csMode = streamCSNone;
+ str->getImageParams(&bits, &csMode);
+
+ // get stream dict
+ dict = str->getDict();
+
+ // get size
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "Width");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "W");
+ }
+ if (obj1.isInt()){
+ width = obj1.getInt();
+ }
+ else if (obj1.isReal()) {
+ width = (int)obj1.getReal();
+ }
+ else {
+ goto err2;
+ }
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "Height");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "H");
+ }
+ if (obj1.isInt()) {
+ height = obj1.getInt();
+ }
+ else if (obj1.isReal()){
+ height = static_cast<int>(obj1.getReal());
+ }
+ else {
+ goto err2;
+ }
+ _POPPLER_FREE(obj1);
+
+ // image interpolation
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "Interpolate");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "I");
+ }
+ if (obj1.isBool())
+ interpolate = obj1.getBool();
+ else
+ interpolate = gFalse;
+ _POPPLER_FREE(obj1);
+ maskInterpolate = gFalse;
+
+ // image or mask?
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "ImageMask");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "IM");
+ }
+ mask = gFalse;
+ if (obj1.isBool()) {
+ mask = obj1.getBool();
+ }
+ else if (!obj1.isNull()) {
+ goto err2;
+ }
+ _POPPLER_FREE(obj1);
+
+ // bit depth
+ if (bits == 0) {
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "BitsPerComponent");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "BPC");
+ }
+ if (obj1.isInt()) {
+ bits = obj1.getInt();
+ } else if (mask) {
+ bits = 1;
+ } else {
+ goto err2;
+ }
+ _POPPLER_FREE(obj1);
+ }
+
+ // display a mask
+ if (mask) {
+ // check for inverted mask
+ if (bits != 1) {
+ goto err1;
+ }
+ invert = gFalse;
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "Decode");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "D");
+ }
+ if (obj1.isArray()) {
+ _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, 0);
+ if (obj2.isInt() && obj2.getInt() == 1) {
+ invert = gTrue;
+ }
+ _POPPLER_FREE(obj2);
+ } else if (!obj1.isNull()) {
+ goto err2;
+ }
+ _POPPLER_FREE(obj1);
+
+ // draw it
+ builder->addImageMask(state, str, width, height, invert, interpolate);
+
+ } else {
+ // get color space and color map
+ GfxColorSpace *colorSpace;
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "ColorSpace");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "CS");
+ }
+ if (!obj1.isNull()) {
+ colorSpace = lookupColorSpaceCopy(obj1);
+ } else if (csMode == streamCSDeviceGray) {
+ colorSpace = new GfxDeviceGrayColorSpace();
+ } else if (csMode == streamCSDeviceRGB) {
+ colorSpace = new GfxDeviceRGBColorSpace();
+ } else if (csMode == streamCSDeviceCMYK) {
+ colorSpace = new GfxDeviceCMYKColorSpace();
+ } else {
+ colorSpace = nullptr;
+ }
+ _POPPLER_FREE(obj1);
+ if (!colorSpace) {
+ goto err1;
+ }
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "Decode");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "D");
+ }
+ GfxImageColorMap *colorMap = new GfxImageColorMap(bits, &obj1, colorSpace);
+ _POPPLER_FREE(obj1);
+ if (!colorMap->isOk()) {
+ delete colorMap;
+ goto err1;
+ }
+
+ // get the mask
+ int maskColors[2*gfxColorMaxComps];
+ haveColorKeyMask = haveExplicitMask = haveSoftMask = gFalse;
+ Stream *maskStr = nullptr;
+ int maskWidth = 0;
+ int maskHeight = 0;
+ maskInvert = gFalse;
+ GfxImageColorMap *maskColorMap = nullptr;
+ _POPPLER_CALL_ARGS(maskObj, dict->lookup, "Mask");
+ _POPPLER_CALL_ARGS(smaskObj, dict->lookup, "SMask");
+ Dict* maskDict;
+ if (smaskObj.isStream()) {
+ // soft mask
+ if (inlineImg) {
+ goto err1;
+ }
+ maskStr = smaskObj.getStream();
+ maskDict = smaskObj.streamGetDict();
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Width");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "W");
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskWidth = obj1.getInt();
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Height");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "H");
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskHeight = obj1.getInt();
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "BitsPerComponent");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "BPC");
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ int maskBits = obj1.getInt();
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Interpolate");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "I");
+ }
+ if (obj1.isBool())
+ maskInterpolate = obj1.getBool();
+ else
+ maskInterpolate = gFalse;
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "ColorSpace");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "CS");
+ }
+ GfxColorSpace *maskColorSpace = lookupColorSpaceCopy(obj1);
+ _POPPLER_FREE(obj1);
+ if (!maskColorSpace || maskColorSpace->getMode() != csDeviceGray) {
+ goto err1;
+ }
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Decode");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "D");
+ }
+ maskColorMap = new GfxImageColorMap(maskBits, &obj1, maskColorSpace);
+ _POPPLER_FREE(obj1);
+ if (!maskColorMap->isOk()) {
+ delete maskColorMap;
+ goto err1;
+ }
+ //~ handle the Matte entry
+ haveSoftMask = gTrue;
+ } else if (maskObj.isArray()) {
+ // color key mask
+ int i;
+ for (i = 0; i < maskObj.arrayGetLength() && i < 2*gfxColorMaxComps; ++i) {
+ _POPPLER_CALL_ARGS(obj1, maskObj.arrayGet, i);
+ maskColors[i] = obj1.getInt();
+ _POPPLER_FREE(obj1);
+ }
+ haveColorKeyMask = gTrue;
+ } else if (maskObj.isStream()) {
+ // explicit mask
+ if (inlineImg) {
+ goto err1;
+ }
+ maskStr = maskObj.getStream();
+ maskDict = maskObj.streamGetDict();
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Width");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "W");
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskWidth = obj1.getInt();
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Height");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "H");
+ }
+ if (!obj1.isInt()) {
+ goto err2;
+ }
+ maskHeight = obj1.getInt();
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "ImageMask");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "IM");
+ }
+ if (!obj1.isBool() || !obj1.getBool()) {
+ goto err2;
+ }
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Interpolate");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "I");
+ }
+ if (obj1.isBool())
+ maskInterpolate = obj1.getBool();
+ else
+ maskInterpolate = gFalse;
+ _POPPLER_FREE(obj1);
+ maskInvert = gFalse;
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Decode");
+ if (obj1.isNull()) {
+ _POPPLER_FREE(obj1);
+ _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "D");
+ }
+ if (obj1.isArray()) {
+ _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, 0);
+ if (obj2.isInt() && obj2.getInt() == 1) {
+ maskInvert = gTrue;
+ }
+ _POPPLER_FREE(obj2);
+ } else if (!obj1.isNull()) {
+ goto err2;
+ }
+ _POPPLER_FREE(obj1);
+ haveExplicitMask = gTrue;
+ }
+
+ // draw it
+ if (haveSoftMask) {
+ builder->addSoftMaskedImage(state, str, width, height, colorMap, interpolate,
+ maskStr, maskWidth, maskHeight, maskColorMap, maskInterpolate);
+ delete maskColorMap;
+ } else if (haveExplicitMask) {
+ builder->addMaskedImage(state, str, width, height, colorMap, interpolate,
+ maskStr, maskWidth, maskHeight, maskInvert, maskInterpolate);
+ } else {
+ builder->addImage(state, str, width, height, colorMap, interpolate,
+ haveColorKeyMask ? maskColors : static_cast<int *>(nullptr));
+ }
+ delete colorMap;
+
+ _POPPLER_FREE(maskObj);
+ _POPPLER_FREE(smaskObj);
+ }
+
+ return;
+
+ err2:
+ _POPPLER_FREE(obj1);
+ err1:
+ error(errSyntaxError, getPos(), "Bad image parameters");
+}
+
+void PdfParser::doForm(Object *str) {
+ Dict *dict;
+ GBool transpGroup, isolated, knockout;
+ GfxColorSpace *blendingColorSpace;
+ Object matrixObj, bboxObj;
+ double m[6], bbox[4];
+ Object resObj;
+ Dict *resDict;
+ Object obj1, obj2, obj3;
+ int i;
+
+ // check for excessive recursion
+ if (formDepth > 20) {
+ return;
+ }
+
+ // get stream dict
+ dict = str->streamGetDict();
+
+ // check form type
+ _POPPLER_CALL_ARGS(obj1, dict->lookup, "FormType");
+ if (!(obj1.isNull() || (obj1.isInt() && obj1.getInt() == 1))) {
+ error(errSyntaxError, getPos(), "Unknown form type");
+ }
+ _POPPLER_FREE(obj1);
+
+ // get bounding box
+ _POPPLER_CALL_ARGS(bboxObj, dict->lookup, "BBox");
+ if (!bboxObj.isArray()) {
+ _POPPLER_FREE(bboxObj);
+ error(errSyntaxError, getPos(), "Bad form bounding box");
+ return;
+ }
+ for (i = 0; i < 4; ++i) {
+ _POPPLER_CALL_ARGS(obj1, bboxObj.arrayGet, i);
+ bbox[i] = obj1.getNum();
+ _POPPLER_FREE(obj1);
+ }
+ _POPPLER_FREE(bboxObj);
+
+ // get matrix
+ _POPPLER_CALL_ARGS(matrixObj, dict->lookup, "Matrix");
+ if (matrixObj.isArray()) {
+ for (i = 0; i < 6; ++i) {
+ _POPPLER_CALL_ARGS(obj1, matrixObj.arrayGet, i);
+ m[i] = obj1.getNum();
+ _POPPLER_FREE(obj1);
+ }
+ } else {
+ m[0] = 1; m[1] = 0;
+ m[2] = 0; m[3] = 1;
+ m[4] = 0; m[5] = 0;
+ }
+ _POPPLER_FREE(matrixObj);
+
+ // get resources
+ _POPPLER_CALL_ARGS(resObj, dict->lookup, "Resources");
+ resDict = resObj.isDict() ? resObj.getDict() : (Dict *)nullptr;
+
+ // check for a transparency group
+ transpGroup = isolated = knockout = gFalse;
+ blendingColorSpace = nullptr;
+ if (_POPPLER_CALL_ARGS_DEREF(obj1, dict->lookup, "Group").isDict()) {
+ if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "S").isName("Transparency")) {
+ transpGroup = gTrue;
+ if (!_POPPLER_CALL_ARGS_DEREF(obj3, obj1.dictLookup, "CS").isNull()) {
+ blendingColorSpace = GfxColorSpace::parse(nullptr, &obj3, nullptr, state);
+ }
+ _POPPLER_FREE(obj3);
+ if (_POPPLER_CALL_ARGS_DEREF(obj3, obj1.dictLookup, "I").isBool()) {
+ isolated = obj3.getBool();
+ }
+ _POPPLER_FREE(obj3);
+ if (_POPPLER_CALL_ARGS_DEREF(obj3, obj1.dictLookup, "K").isBool()) {
+ knockout = obj3.getBool();
+ }
+ _POPPLER_FREE(obj3);
+ }
+ _POPPLER_FREE(obj2);
+ }
+ _POPPLER_FREE(obj1);
+
+ // draw it
+ ++formDepth;
+ doForm1(str, resDict, m, bbox,
+ transpGroup, gFalse, blendingColorSpace, isolated, knockout);
+ --formDepth;
+
+ if (blendingColorSpace) {
+ delete blendingColorSpace;
+ }
+ _POPPLER_FREE(resObj);
+}
+
+void PdfParser::doForm1(Object *str, Dict *resDict, double *matrix, double *bbox, GBool transpGroup, GBool softMask,
+ GfxColorSpace *blendingColorSpace, GBool isolated, GBool knockout, GBool alpha,
+ Function *transferFunc, GfxColor *backdropColor)
+{
+ Parser *oldParser;
+
+ // push new resources on stack
+ pushResources(resDict);
+
+ // Add a new container group before saving the state
+ builder->startGroup(state, bbox, blendingColorSpace, isolated, knockout, softMask);
+
+ // 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]);
+
+ // 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();
+ builder->setClip(state, clipNormal, true);
+ state->clearPath();
+
+ if (softMask || transpGroup) {
+ if (state->getBlendMode() != gfxBlendNormal) {
+ state->setBlendMode(gfxBlendNormal);
+ }
+ if (state->getFillOpacity() != 1) {
+ builder->setGroupOpacity(state->getFillOpacity());
+ state->setFillOpacity(1);
+ }
+ if (state->getStrokeOpacity() != 1) {
+ state->setStrokeOpacity(1);
+ }
+ }
+
+ // set new base matrix
+ auto oldBaseMatrix = baseMatrix;
+ baseMatrix = stateToAffine(state);
+
+ // draw the form
+ parse(str, gFalse);
+
+ // restore base matrix
+ baseMatrix = oldBaseMatrix;
+
+ // restore parser
+ parser = oldParser;
+
+ // restore graphics state
+ restoreState();
+
+ // pop resource stack
+ popResources();
+
+ // complete any masking
+ builder->finishGroup(state, softMask);
+}
+
+//------------------------------------------------------------------------
+// in-line image operators
+//------------------------------------------------------------------------
+
+void PdfParser::opBeginImage(Object /*args*/[], int /*numArgs*/)
+{
+ // build dict/stream
+ Stream *str = buildImageStream();
+
+ // display the image
+ if (str) {
+ doImage(nullptr, str, gTrue);
+
+ // skip 'EI' tag
+ int c1 = str->getUndecodedStream()->getChar();
+ int c2 = str->getUndecodedStream()->getChar();
+ while (!(c1 == 'E' && c2 == 'I') && c2 != EOF) {
+ c1 = c2;
+ c2 = str->getUndecodedStream()->getChar();
+ }
+ delete str;
+ }
+}
+
+Stream *PdfParser::buildImageStream() {
+ Object dict;
+ Object obj;
+ Stream *str;
+
+ // build dictionary
+#if defined(POPPLER_NEW_OBJECT_API)
+ dict = Object(new Dict(xref));
+#else
+ dict.initDict(xref);
+#endif
+ _POPPLER_CALL(obj, parser->getObj);
+ while (!obj.isCmd(const_cast<char*>("ID")) && !obj.isEOF()) {
+ if (!obj.isName()) {
+ error(errSyntaxError, getPos(), "Inline image dictionary key must be a name object");
+ _POPPLER_FREE(obj);
+ } else {
+ Object obj2;
+ _POPPLER_CALL(obj2, parser->getObj);
+ if (obj2.isEOF() || obj2.isError()) {
+ _POPPLER_FREE(obj);
+ break;
+ }
+ _POPPLER_DICTADD(dict, obj.getName(), obj2);
+ _POPPLER_FREE(obj);
+ _POPPLER_FREE(obj2);
+ }
+ _POPPLER_CALL(obj, parser->getObj);
+ }
+ if (obj.isEOF()) {
+ error(errSyntaxError, getPos(), "End of file in inline image");
+ _POPPLER_FREE(obj);
+ _POPPLER_FREE(dict);
+ return nullptr;
+ }
+ _POPPLER_FREE(obj);
+
+ // make stream
+#if defined(POPPLER_NEW_OBJECT_API)
+ str = new EmbedStream(parser->getStream(), dict.copy(), gFalse, 0);
+ str = str->addFilters(dict.getDict());
+#else
+ str = new EmbedStream(parser->getStream(), &dict, gFalse, 0);
+ str = str->addFilters(&dict);
+#endif
+
+ return str;
+}
+
+void PdfParser::opImageData(Object /*args*/[], int /*numArgs*/)
+{
+ error(errInternal, getPos(), "Internal: got 'ID' operator");
+}
+
+void PdfParser::opEndImage(Object /*args*/[], int /*numArgs*/)
+{
+ error(errInternal, getPos(), "Internal: got 'EI' operator");
+}
+
+//------------------------------------------------------------------------
+// type 3 font operators
+//------------------------------------------------------------------------
+
+void PdfParser::opSetCharWidth(Object /*args*/[], int /*numArgs*/)
+{
+}
+
+void PdfParser::opSetCacheDevice(Object /*args*/[], int /*numArgs*/)
+{
+}
+
+//------------------------------------------------------------------------
+// compatibility operators
+//------------------------------------------------------------------------
+
+void PdfParser::opBeginIgnoreUndef(Object /*args*/[], int /*numArgs*/)
+{
+ ++ignoreUndef;
+}
+
+void PdfParser::opEndIgnoreUndef(Object /*args*/[], int /*numArgs*/)
+{
+ if (ignoreUndef > 0)
+ --ignoreUndef;
+}
+
+//------------------------------------------------------------------------
+// marked content operators
+//------------------------------------------------------------------------
+
+void PdfParser::opBeginMarkedContent(Object args[], int numArgs) {
+ if (formDepth != 0)
+ return;
+ if (printCommands) {
+ printf(" marked content: %s ", args[0].getName());
+ if (numArgs == 2)
+ args[2].print(stdout);
+ printf("\n");
+ fflush(stdout);
+ }
+ if (numArgs == 2 && args[1].isName()) {
+ // Optional content (OC) to add objects to layer.
+ builder->beginMarkedContent(args[0].getName(), args[1].getName());
+ } else {
+ builder->beginMarkedContent();
+ }
+}
+
+void PdfParser::opEndMarkedContent(Object /*args*/[], int /*numArgs*/)
+{
+ if (formDepth == 0)
+ builder->endMarkedContent();
+}
+
+void PdfParser::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);
+ }
+
+ if(numArgs == 2) {
+ //out->markPoint(args[0].getName(),args[1].getDict());
+ } else {
+ //out->markPoint(args[0].getName());
+ }
+
+}
+
+//------------------------------------------------------------------------
+// misc
+//------------------------------------------------------------------------
+
+void PdfParser::saveState() {
+ bool is_radial = false;
+ GfxPattern *pattern = state->getFillPattern();
+
+ if (pattern && pattern->getType() == 2) {
+ GfxShadingPattern *shading_pattern = static_cast<GfxShadingPattern *>(pattern);
+ GfxShading *shading = shading_pattern->getShading();
+ if (shading->getType() == 3)
+ is_radial = true;
+ }
+
+ if (is_radial)
+ state->save(); // nasty hack to prevent GfxRadialShading from getting corrupted during copy operation
+ else
+ state = state->save(); // see LP Bug 919176 comment 8
+ builder->saveState(state);
+}
+
+void PdfParser::restoreState() {
+ builder->restoreState(state);
+ state = state->restore();
+}
+
+void PdfParser::pushResources(Dict *resDict) {
+ res = new GfxResources(xref, resDict, res);
+}
+
+void PdfParser::popResources() {
+ GfxResources *resPtr;
+
+ resPtr = res->getNext();
+ delete res;
+ res = resPtr;
+}
+
+void PdfParser::setDefaultApproximationPrecision() {
+ for (int i = 1; i <= pdfNumShadingTypes; ++i) {
+ setApproximationPrecision(i, defaultShadingColorDelta, defaultShadingMaxDepth);
+ }
+}
+
+void PdfParser::setApproximationPrecision(int shadingType, double colorDelta,
+ int maxDepth) {
+
+ if (shadingType > pdfNumShadingTypes || shadingType < 1) {
+ return;
+ }
+ colorDeltas[shadingType-1] = dblToCol(colorDelta);
+ maxDepths[shadingType-1] = maxDepth;
+}
+
+/**
+ * Optional content groups are often used in ai files, but
+ * not always and can be useful ways of collecting objects.
+ */
+void PdfParser::loadOptionalContentLayers(Dict *resources)
+{
+ auto props = resources->lookup("Properties");
+ if (!props.isDict())
+ return;
+
+ auto cat = _pdf_doc->getCatalog();
+ auto ocgs = cat->getOptContentConfig();
+ auto dict = props.getDict();
+
+ for (auto j = 0; j < dict->getLength(); j++) {
+ auto val = dict->getVal(j);
+ if (!val.isDict())
+ continue;
+ auto dict2 = val.getDict();
+ if (dict2->lookup("Type").isName("OCG") && ocgs) {
+ std::string label = getDictString(dict2, "Name");
+ auto visible = true;
+ // Normally we'd use poppler optContentIsVisible, but these dict
+ // objects don't retain their references so can't be used directly.
+ for (auto &[ref, ocg] : ocgs->getOCGs()) {
+ if (ocg->getName()->cmp(label) == 0)
+ visible = ocg->getState() == OptionalContentGroup::On;
+ }
+ builder->addOptionalGroup(dict->getKey(j), label, visible);
+ }
+ }
+}
+
+/**
+ * Load the internal ICC profile from the PDF file.
+ */
+void PdfParser::loadColorProfile()
+{
+ Object catDict = xref->getCatalog();
+ if (!catDict.isDict())
+ return;
+
+ Object outputIntents = catDict.dictLookup("OutputIntents");
+ if (!outputIntents.isArray() || outputIntents.arrayGetLength() != 1)
+ return;
+
+ Object firstElement = outputIntents.arrayGet(0);
+ if (!firstElement.isDict())
+ return;
+
+ Object profile = firstElement.dictLookup("DestOutputProfile");
+ if (!profile.isStream())
+ return;
+
+ Stream *iccStream = profile.getStream();
+#if POPPLER_CHECK_VERSION(22, 4, 0)
+ std::vector<unsigned char> profBuf = iccStream->toUnsignedChars(65536, 65536);
+ builder->addColorProfile(profBuf.data(), profBuf.size());
+#else
+ int length = 0;
+ unsigned char *profBuf = iccStream->toUnsignedChars(&length, 65536, 65536);
+ builder->addColorProfile(profBuf, length);
+#endif
+}
+
+void PdfParser::debug_array(const Array *array, int depth, XRef *xref)
+{
+ if (depth > 20) {
+ std::cout << "[ ... ]";
+ return;
+ }
+ std::cout << "[\n";
+ for (int i = 0; i < array->getLength(); ++i) {
+ for (int x = depth; x > -1; x--)
+ std::cout << " ";
+ std::cout << i << ": ";
+ Object obj = array->get(i);
+ PdfParser::debug_object(&obj, depth + 1, xref);
+ std::cout << ",\n";
+ }
+ for (int x = depth; x > 0; x--)
+ std::cout << " ";
+ std::cout << "]";
+}
+
+void PdfParser::debug_dict(const Dict *dict, int depth, XRef *xref)
+{
+ if (depth > 20) {
+ std::cout << "{ ... }";
+ return;
+ }
+ std::cout << "{\n";
+ for (auto j = 0; j < dict->getLength(); j++) {
+ auto key = dict->getKey(j);
+ auto val = dict->getVal(j);
+ for (int x = depth; x > -1; x--)
+ std::cout << " ";
+ std::cout << key << ": ";
+ PdfParser::debug_object(&val, depth + 1, xref);
+ std::cout << ",\n";
+ }
+ for (int x = depth; x > 0; x--)
+ std::cout << " ";
+ std::cout << "}";
+}
+
+void PdfParser::debug_object(const Object *obj, int depth, XRef *xref)
+{
+ if (obj->isRef()) {
+ std::cout << " > REF(" << obj->getRef().num << "):";
+ if (xref) {
+ auto ref = obj->fetch(xref);
+ PdfParser::debug_object(&ref, depth + 1, xref);
+ }
+ } else if (obj->isDict()) {
+ PdfParser::debug_dict(obj->getDict(), depth, xref);
+ } else if (obj->isArray()) {
+ PdfParser::debug_array(obj->getArray(), depth, xref);
+ } else if (obj->isString()) {
+ std::cout << " STR '" << obj->getString()->getCString() << "'";
+ } else if (obj->isName()) {
+ std::cout << " NAME '" << obj->getName() << "'";
+ } else if (obj->isBool()) {
+ std::cout << " BOOL " << (obj->getBool() ? "true" : "false");
+ } else if (obj->isNum()) {
+ std::cout << " NUM " << obj->getNum();
+ } else {
+ std::cout << " > ? " << obj->getType() << "";
+ }
+}
+
+#endif /* HAVE_POPPLER */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-07 18:24:15 +0000