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// Gfx.h
// Copyright 1996-2003 Glyph & Cog, LLC
// Modified under the Poppler project -
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
// Copyright (C) 2005 Jonathan Blandford <>
// Copyright (C) 2007 Iñigo Martínez <>
// Copyright (C) 2008 Brad Hards <>
// Copyright (C) 2008, 2010 Carlos Garcia Campos <>
// Copyright (C) 2009-2013 Albert Astals Cid <>
// Copyright (C) 2009, 2010, 2012, 2013 Thomas Freitag <>
// Copyright (C) 2010 David Benjamin <>
// Copyright (C) 2010 Christian Feuersänger <>
// Copyright (C) 2013 Fabio D'Urso <>
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
#ifndef GFX_H
#define GFX_H
#pragma interface
#include "poppler-config.h"
#include "goo/gtypes.h"
#include "goo/GooList.h"
#include "GfxState.h"
#include "Object.h"
#include "PopplerCache.h"
#include <vector>
class GooString;
class PDFDoc;
class XRef;
class Array;
class Stream;
class Parser;
class Dict;
class Function;
class OutputDev;
class GfxFontDict;
class GfxFont;
class GfxPattern;
class GfxTilingPattern;
class GfxShadingPattern;
class GfxShading;
class GfxFunctionShading;
class GfxAxialShading;
class GfxRadialShading;
class GfxGouraudTriangleShading;
class GfxPatchMeshShading;
struct GfxPatch;
class GfxState;
struct GfxColor;
class GfxColorSpace;
class Gfx;
class PDFRectangle;
class AnnotBorder;
class AnnotColor;
class Catalog;
struct MarkedContentStack;
enum GfxClipType {
enum TchkType {
tchkBool, // boolean
tchkInt, // integer
tchkNum, // number (integer or real)
tchkString, // string
tchkName, // name
tchkArray, // array
tchkProps, // properties (dictionary or name)
tchkSCN, // scn/SCN args (number of name)
tchkNone // used to avoid empty initializer lists
#define maxArgs 33
struct Operator {
char name[4];
int numArgs;
TchkType tchk[maxArgs];
void (Gfx::*func)(Object args[], int numArgs);
class GfxResources {
GfxResources(XRef *xref, Dict *resDict, GfxResources *nextA);
GfxFont *lookupFont(char *name);
GBool lookupXObject(char *name, Object *obj);
GBool lookupXObjectNF(char *name, Object *obj);
GBool lookupMarkedContentNF(char *name, Object *obj);
void lookupColorSpace(const char *name, Object *obj);
GfxPattern *lookupPattern(char *name, OutputDev *out);
GfxShading *lookupShading(char *name, OutputDev *out);
GBool lookupGState(char *name, Object *obj);
GBool lookupGStateNF(char *name, Object *obj);
GfxResources *getNext() { return next; }
GfxFontDict *fonts;
Object xObjDict;
Object colorSpaceDict;
Object patternDict;
Object shadingDict;
Object gStateDict;
PopplerObjectCache gStateCache;
Object propertiesDict;
GfxResources *next;
// Gfx
class Gfx {
// Constructor for regular output.
Gfx(PDFDoc *docA, OutputDev *outA, int pageNum, Dict *resDict,
double hDPI, double vDPI, PDFRectangle *box,
PDFRectangle *cropBox, int rotate,
GBool (*abortCheckCbkA)(void *data) = NULL,
void *abortCheckCbkDataA = NULL, XRef *xrefA = NULL);
// Constructor for a sub-page object.
Gfx(PDFDoc *docA, OutputDev *outA, Dict *resDict,
PDFRectangle *box, PDFRectangle *cropBox,
GBool (*abortCheckCbkA)(void *data) = NULL,
void *abortCheckCbkDataA = NULL, XRef *xrefA = NULL);
XRef *getXRef() { return xref; }
// Interpret a stream or array of streams.
void display(Object *obj, GBool topLevel = gTrue);
// Display an annotation, given its appearance (a Form XObject),
// border style, and bounding box (in default user space).
void drawAnnot(Object *str, AnnotBorder *border, AnnotColor *aColor,
double xMin, double yMin, double xMax, double yMax, int rotate);
// Save graphics state.
void saveState();
// Push a new state guard
void pushStateGuard();
// Restore graphics state.
void restoreState();
// Pop to state guard and pop guard
void popStateGuard();
// Get the current graphics state object.
GfxState *getState() { return state; }
GBool checkTransparencyGroup(Dict *resDict);
void drawForm(Object *str, Dict *resDict, double *matrix, double *bbox,
GBool transpGroup = gFalse, GBool softMask = gFalse,
GfxColorSpace *blendingColorSpace = NULL,
GBool isolated = gFalse, GBool knockout = gFalse,
GBool alpha = gFalse, Function *transferFunc = NULL,
GfxColor *backdropColor = NULL);
void pushResources(Dict *resDict);
void popResources();
PDFDoc *doc;
XRef *xref; // the xref table for this PDF file
Catalog *catalog; // the Catalog for this PDF file
OutputDev *out; // output device
GBool subPage; // is this a sub-page object?
GBool printCommands; // print the drawing commands (for debugging)
GBool profileCommands; // profile the drawing commands (for debugging)
GBool commandAborted; // did the previous command abort the drawing?
GfxResources *res; // resource stack
int updateLevel;
GfxState *state; // current graphics state
int stackHeight; // the height of the current graphics stack
std::vector<int> stateGuards; // a stack of state limits; to guard against unmatched pops
GBool fontChanged; // set if font or text matrix has changed
GfxClipType clip; // do a clip?
int ignoreUndef; // current BX/EX nesting level
double baseMatrix[6]; // default matrix for most recent
// page/form/pattern
int formDepth;
GBool ocState; // true if drawing is enabled, false if
// disabled
MarkedContentStack *mcStack; // current BMC/EMC stack
Parser *parser; // parser for page content stream(s)
std::set<int> formsDrawing; // the forms that are being drawn
GBool // callback to check for an abort
(*abortCheckCbk)(void *data);
void *abortCheckCbkData;
static Operator opTab[]; // table of operators
void go(GBool topLevel);
void execOp(Object *cmd, Object args[], int numArgs);
Operator *findOp(char *name);
GBool checkArg(Object *arg, TchkType type);
Goffset getPos();
int bottomGuard();
// graphics state operators
void opSave(Object args[], int numArgs);
void opRestore(Object args[], int numArgs);
void opConcat(Object args[], int numArgs);
void opSetDash(Object args[], int numArgs);
void opSetFlat(Object args[], int numArgs);
void opSetLineJoin(Object args[], int numArgs);
void opSetLineCap(Object args[], int numArgs);
void opSetMiterLimit(Object args[], int numArgs);
void opSetLineWidth(Object args[], int numArgs);
void opSetExtGState(Object args[], int numArgs);
void doSoftMask(Object *str, GBool alpha,
GfxColorSpace *blendingColorSpace,
GBool isolated, GBool knockout,
Function *transferFunc, GfxColor *backdropColor);
void opSetRenderingIntent(Object args[], int numArgs);
// color operators
void opSetFillGray(Object args[], int numArgs);
void opSetStrokeGray(Object args[], int numArgs);
void opSetFillCMYKColor(Object args[], int numArgs);
void opSetStrokeCMYKColor(Object args[], int numArgs);
void opSetFillRGBColor(Object args[], int numArgs);
void opSetStrokeRGBColor(Object args[], int numArgs);
void opSetFillColorSpace(Object args[], int numArgs);
void opSetStrokeColorSpace(Object args[], int numArgs);
void opSetFillColor(Object args[], int numArgs);
void opSetStrokeColor(Object args[], int numArgs);
void opSetFillColorN(Object args[], int numArgs);
void opSetStrokeColorN(Object args[], int numArgs);
// path segment operators
void opMoveTo(Object args[], int numArgs);
void opLineTo(Object args[], int numArgs);
void opCurveTo(Object args[], int numArgs);
void opCurveTo1(Object args[], int numArgs);
void opCurveTo2(Object args[], int numArgs);
void opRectangle(Object args[], int numArgs);
void opClosePath(Object args[], int numArgs);
// path painting operators
void opEndPath(Object args[], int numArgs);
void opStroke(Object args[], int numArgs);
void opCloseStroke(Object args[], int numArgs);
void opFill(Object args[], int numArgs);
void opEOFill(Object args[], int numArgs);
void opFillStroke(Object args[], int numArgs);
void opCloseFillStroke(Object args[], int numArgs);
void opEOFillStroke(Object args[], int numArgs);
void opCloseEOFillStroke(Object args[], int numArgs);
void doPatternFill(GBool eoFill);
void doPatternStroke();
void doPatternText();
void doPatternImageMask(Object *ref, Stream *str, int width, int height,
GBool invert, GBool inlineImg);
void doTilingPatternFill(GfxTilingPattern *tPat,
GBool stroke, GBool eoFill, GBool text);
void doShadingPatternFill(GfxShadingPattern *sPat,
GBool stroke, GBool eoFill, GBool text);
void opShFill(Object args[], int numArgs);
void doFunctionShFill(GfxFunctionShading *shading);
void doFunctionShFill1(GfxFunctionShading *shading,
double x0, double y0,
double x1, double y1,
GfxColor *colors, int depth);
void doAxialShFill(GfxAxialShading *shading);
void doRadialShFill(GfxRadialShading *shading);
void doGouraudTriangleShFill(GfxGouraudTriangleShading *shading);
void gouraudFillTriangle(double x0, double y0, GfxColor *color0,
double x1, double y1, GfxColor *color1,
double x2, double y2, GfxColor *color2,
int nComps, int depth, GfxState::ReusablePathIterator *path);
void gouraudFillTriangle(double x0, double y0, double color0,
double x1, double y1, double color1,
double x2, double y2, double color2,
double refineColorThreshold, int depth, GfxGouraudTriangleShading *shading, GfxState::ReusablePathIterator *path);
void doPatchMeshShFill(GfxPatchMeshShading *shading);
void fillPatch(GfxPatch *patch, int colorComps, int patchColorComps, double refineColorThreshold, int depth, GfxPatchMeshShading *shading);
void doEndPath();
// path clipping operators
void opClip(Object args[], int numArgs);
void opEOClip(Object args[], int numArgs);
// text object operators
void opBeginText(Object args[], int numArgs);
void opEndText(Object args[], int numArgs);
// text state operators
void opSetCharSpacing(Object args[], int numArgs);
void opSetFont(Object args[], int numArgs);
void opSetTextLeading(Object args[], int numArgs);
void opSetTextRender(Object args[], int numArgs);
void opSetTextRise(Object args[], int numArgs);
void opSetWordSpacing(Object args[], int numArgs);
void opSetHorizScaling(Object args[], int numArgs);
// text positioning operators
void opTextMove(Object args[], int numArgs);
void opTextMoveSet(Object args[], int numArgs);
void opSetTextMatrix(Object args[], int numArgs);
void opTextNextLine(Object args[], int numArgs);
// text string operators
void opShowText(Object args[], int numArgs);
void opMoveShowText(Object args[], int numArgs);
void opMoveSetShowText(Object args[], int numArgs);
void opShowSpaceText(Object args[], int numArgs);
void doShowText(GooString *s);
void doIncCharCount(GooString *s);
// XObject operators
void opXObject(Object args[], int numArgs);
void doImage(Object *ref, Stream *str, GBool inlineImg);
void doForm(Object *str);
// in-line image operators
void opBeginImage(Object args[], int numArgs);
Stream *buildImageStream();
void opImageData(Object args[], int numArgs);
void opEndImage(Object args[], int numArgs);
// type 3 font operators
void opSetCharWidth(Object args[], int numArgs);
void opSetCacheDevice(Object args[], int numArgs);
// compatibility operators
void opBeginIgnoreUndef(Object args[], int numArgs);
void opEndIgnoreUndef(Object args[], int numArgs);
// marked content operators
void opBeginMarkedContent(Object args[], int numArgs);
void opEndMarkedContent(Object args[], int numArgs);
void opMarkPoint(Object args[], int numArgs);
GfxState *saveStateStack();
void restoreStateStack(GfxState *oldState);
GBool contentIsHidden();
void pushMarkedContent();
void popMarkedContent();