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// OutputDev.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) 2006 Thorkild Stray <>
// Copyright (C) 2007 Jeff Muizelaar <>
// Copyright (C) 2007, 2011, 2017 Adrian Johnson <>
// Copyright (C) 2009-2013, 2015 Thomas Freitag <>
// Copyright (C) 2009, 2011 Carlos Garcia Campos <>
// Copyright (C) 2009, 2012, 2013, 2018, 2019 Albert Astals Cid <>
// Copyright (C) 2010 Christian Feuersänger <>
// Copyright (C) 2012 Fabio D'Urso <>
// Copyright (C) 2012 William Bader <>
// Copyright (C) 2017, 2018 Oliver Sander <>
// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <>. Work sponsored by the LiMux project of the city of Munich
// Copyright (C) 2018 Adam Reichold <>
// 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
#include "poppler-config.h"
#include "CharTypes.h"
#include "Object.h"
#include "PopplerCache.h"
#include "ProfileData.h"
#include <memory>
#include <unordered_map>
#include <string>
class Annot;
class Dict;
class GooString;
class GfxState;
class Gfx;
struct GfxColor;
class GfxColorSpace;
#ifdef USE_CMS
class GfxICCBasedColorSpace;
class GfxImageColorMap;
class GfxFunctionShading;
class GfxAxialShading;
class GfxGouraudTriangleShading;
class GfxPatchMeshShading;
class GfxRadialShading;
class GfxGouraudTriangleShading;
class GfxPatchMeshShading;
class Stream;
class Links;
class AnnotLink;
class Catalog;
class Page;
class Function;
// OutputDev
class OutputDev {
// Constructor.
// Destructor.
virtual ~OutputDev();
//----- get info about output device
// Does this device use upside-down coordinates?
// (Upside-down means (0,0) is the top left corner of the page.)
virtual bool upsideDown() = 0;
// Does this device use drawChar() or drawString()?
virtual bool useDrawChar() = 0;
// Does this device use tilingPatternFill()? If this returns false,
// tiling pattern fills will be reduced to a series of other drawing
// operations.
virtual bool useTilingPatternFill() { return false; }
// Does this device support specific shading types?
// see gouraudTriangleShadedFill() and patchMeshShadedFill()
virtual bool useShadedFills(int type) { return false; }
// Does this device use FillColorStop()?
virtual bool useFillColorStop() { return false; }
// Does this device use drawForm()? If this returns false,
// form-type XObjects will be interpreted (i.e., unrolled).
virtual bool useDrawForm() { return false; }
// Does this device use beginType3Char/endType3Char? Otherwise,
// text in Type 3 fonts will be drawn with drawChar/drawString.
virtual bool interpretType3Chars() = 0;
// Does this device need non-text content?
virtual bool needNonText() { return true; }
// Does this device require incCharCount to be called for text on
// non-shown layers?
virtual bool needCharCount() { return false; }
// Does this device need to clip pages to the crop box even when the
// box is the crop box?
virtual bool needClipToCropBox() { return false; }
//----- initialization and control
// Set default transform matrix.
virtual void setDefaultCTM(const double *ctm);
// Check to see if a page slice should be displayed. If this
// returns false, the page display is aborted. Typically, an
// OutputDev will use some alternate means to display the page
// before returning false.
virtual bool checkPageSlice(Page *page, double hDPI, double vDPI,
int rotate, bool useMediaBox, bool crop,
int sliceX, int sliceY, int sliceW, int sliceH,
bool printing,
bool (* abortCheckCbk)(void *data) = nullptr,
void * abortCheckCbkData = nullptr,
bool (*annotDisplayDecideCbk)(Annot *annot, void *user_data) = nullptr,
void *annotDisplayDecideCbkData = nullptr)
{ return true; }
// Start a page.
virtual void startPage(int pageNum, GfxState *state, XRef *xref) {}
// End a page.
virtual void endPage() {}
// Dump page contents to display.
virtual void dump() {}
//----- coordinate conversion
// Convert between device and user coordinates.
virtual void cvtDevToUser(double dx, double dy, double *ux, double *uy);
virtual void cvtUserToDev(double ux, double uy, int *dx, int *dy);
const double *getDefCTM() const { return defCTM; }
const double *getDefICTM() const { return defICTM; }
//----- save/restore graphics state
virtual void saveState(GfxState * /*state*/) {}
virtual void restoreState(GfxState * /*state*/) {}
//----- update graphics state
virtual void updateAll(GfxState *state);
// Update the Current Transformation Matrix (CTM), i.e., the new matrix
// given in m11, ..., m32 is combined with the current value of the CTM.
// At the same time, when this method is called, state->getCTM() already
// contains the correct new CTM, so one may as well replace the
// CTM of the renderer with that.
virtual void updateCTM(GfxState * /*state*/, double /*m11*/, double /*m12*/,
double /*m21*/, double /*m22*/, double /*m31*/, double /*m32*/) {}
virtual void updateLineDash(GfxState * /*state*/) {}
virtual void updateFlatness(GfxState * /*state*/) {}
virtual void updateLineJoin(GfxState * /*state*/) {}
virtual void updateLineCap(GfxState * /*state*/) {}
virtual void updateMiterLimit(GfxState * /*state*/) {}
virtual void updateLineWidth(GfxState * /*state*/) {}
virtual void updateStrokeAdjust(GfxState * /*state*/) {}
virtual void updateAlphaIsShape(GfxState * /*state*/) {}
virtual void updateTextKnockout(GfxState * /*state*/) {}
virtual void updateFillColorSpace(GfxState * /*state*/) {}
virtual void updateStrokeColorSpace(GfxState * /*state*/) {}
virtual void updateFillColor(GfxState * /*state*/) {}
virtual void updateStrokeColor(GfxState * /*state*/) {}
virtual void updateBlendMode(GfxState * /*state*/) {}
virtual void updateFillOpacity(GfxState * /*state*/) {}
virtual void updateStrokeOpacity(GfxState * /*state*/) {}
virtual void updatePatternOpacity(GfxState * /*state*/) {}
virtual void clearPatternOpacity(GfxState * /*state*/) {}
virtual void updateFillOverprint(GfxState * /*state*/) {}
virtual void updateStrokeOverprint(GfxState * /*state*/) {}
virtual void updateOverprintMode(GfxState * /*state*/) {}
virtual void updateTransfer(GfxState * /*state*/) {}
virtual void updateFillColorStop(GfxState * /*state*/, double /*offset*/) {}
//----- update text state
virtual void updateFont(GfxState * /*state*/) {}
virtual void updateTextMat(GfxState * /*state*/) {}
virtual void updateCharSpace(GfxState * /*state*/) {}
virtual void updateRender(GfxState * /*state*/) {}
virtual void updateRise(GfxState * /*state*/) {}
virtual void updateWordSpace(GfxState * /*state*/) {}
virtual void updateHorizScaling(GfxState * /*state*/) {}
virtual void updateTextPos(GfxState * /*state*/) {}
virtual void updateTextShift(GfxState * /*state*/, double /*shift*/) {}
virtual void saveTextPos(GfxState * /*state*/) {}
virtual void restoreTextPos(GfxState * /*state*/) {}
//----- path painting
virtual void stroke(GfxState * /*state*/) {}
virtual void fill(GfxState * /*state*/) {}
virtual void eoFill(GfxState * /*state*/) {}
virtual bool tilingPatternFill(GfxState * /*state*/, Gfx * /*gfx*/, Catalog * /*cat*/, Object * /*str*/,
const double * /*pmat*/, int /*paintType*/, int /*tilingType*/, Dict * /*resDict*/,
const double * /*mat*/, const double * /*bbox*/,
int /*x0*/, int /*y0*/, int /*x1*/, int /*y1*/,
double /*xStep*/, double /*yStep*/)
{ return false; }
virtual bool functionShadedFill(GfxState * /*state*/,
GfxFunctionShading * /*shading*/)
{ return false; }
virtual bool axialShadedFill(GfxState * /*state*/, GfxAxialShading * /*shading*/, double /*tMin*/, double /*tMax*/)
{ return false; }
virtual bool axialShadedSupportExtend(GfxState * /*state*/, GfxAxialShading * /*shading*/)
{ return false; }
virtual bool radialShadedFill(GfxState * /*state*/, GfxRadialShading * /*shading*/, double /*sMin*/, double /*sMax*/)
{ return false; }
virtual bool radialShadedSupportExtend(GfxState * /*state*/, GfxRadialShading * /*shading*/)
{ return false; }
virtual bool gouraudTriangleShadedFill(GfxState *state, GfxGouraudTriangleShading *shading)
{ return false; }
virtual bool patchMeshShadedFill(GfxState *state, GfxPatchMeshShading *shading)
{ return false; }
//----- path clipping
// Update the clipping path. The new path is the intersection of the old path
// with the path given in 'state'.
// Additionally, set the clipping mode to the 'nonzero winding number rule'.
// That is, a point is inside the clipping region if its winding number
// with respect to the clipping path is nonzero.
virtual void clip(GfxState * /*state*/) {}
// Update the clipping path. The new path is the intersection of the old path
// with the path given in 'state'.
// Additionally, set the clipping mode to the 'even-odd rule'. That is, a point is
// inside the clipping region if a ray from it to infinity will cross the clipping
// path an odd number of times (disregarding the path orientation).
virtual void eoClip(GfxState * /*state*/) {}
virtual void clipToStrokePath(GfxState * /*state*/) {}
//----- text drawing
virtual void beginStringOp(GfxState * /*state*/) {}
virtual void endStringOp(GfxState * /*state*/) {}
virtual void beginString(GfxState * /*state*/, const GooString * /*s*/) {}
virtual void endString(GfxState * /*state*/) {}
// Draw one glyph at a specified position
// Arguments are:
// CharCode code: This is the character code in the content stream. It needs to be mapped back to a glyph index.
// int nBytes: The text strings in the content stream can consists of either 8-bit or 16-bit
// character codes depending on the font. nBytes is the number of bytes in the character code.
// Unicode *u: The UCS-4 mapping used for text extraction (TextOutputDev).
// int uLen: The number of unicode entries in u. Usually '1', for a single character,
// but it may also have larger values, for example for ligatures.
virtual void drawChar(GfxState * /*state*/, double /*x*/, double /*y*/,
double /*dx*/, double /*dy*/,
double /*originX*/, double /*originY*/,
CharCode /*code*/, int /*nBytes*/, const Unicode * /*u*/, int /*uLen*/) {}
virtual void drawString(GfxState * /*state*/, const GooString * /*s*/) {}
virtual bool beginType3Char(GfxState * /*state*/, double /*x*/, double /*y*/,
double /*dx*/, double /*dy*/,
CharCode /*code*/, const Unicode * /*u*/, int /*uLen*/);
virtual void endType3Char(GfxState * /*state*/) {}
virtual void beginTextObject(GfxState * /*state*/) {}
virtual void endTextObject(GfxState * /*state*/) {}
virtual void incCharCount(int /*nChars*/) {}
virtual void beginActualText(GfxState * /*state*/, const GooString * /*text*/ ) {}
virtual void endActualText(GfxState * /*state*/) {}
//----- image drawing
// Draw an image mask. An image mask is a one-bit-per-pixel image, where each pixel
// can only be 'fill color' or 'transparent'.
// If 'invert' is false, a sample value of 0 marks the page with the current color,
// and a 1 leaves the previous contents unchanged. If 'invert' is true, these meanings are reversed.
virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
int width, int height, bool invert, bool interpolate,
bool inlineImg);
virtual void setSoftMaskFromImageMask(GfxState *state,
Object *ref, Stream *str,
int width, int height, bool invert,
bool inlineImg, double *baseMatrix);
virtual void unsetSoftMaskFromImageMask(GfxState *state, double *baseMatrix);
virtual void drawImage(GfxState *state, Object *ref, Stream *str,
int width, int height, GfxImageColorMap *colorMap,
bool interpolate, const int *maskColors, bool inlineImg);
virtual void drawMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap, bool interpolate,
Stream *maskStr, int maskWidth, int maskHeight,
bool maskInvert, bool maskInterpolate);
virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap,
bool interpolate,
Stream *maskStr,
int maskWidth, int maskHeight,
GfxImageColorMap *maskColorMap,
bool maskInterpolate);
//----- grouping operators
virtual void endMarkedContent(GfxState *state);
virtual void beginMarkedContent(const char *name, Dict *properties);
virtual void markPoint(const char *name);
virtual void markPoint(const char *name, Dict *properties);
//----- OPI functions
virtual void opiBegin(GfxState *state, Dict *opiDict);
virtual void opiEnd(GfxState *state, Dict *opiDict);
//----- Type 3 font operators
virtual void type3D0(GfxState * /*state*/, double /*wx*/, double /*wy*/) {}
virtual void type3D1(GfxState * /*state*/, double /*wx*/, double /*wy*/,
double /*llx*/, double /*lly*/, double /*urx*/, double /*ury*/) {}
//----- form XObjects
virtual void drawForm(Ref /*id*/) {}
//----- PostScript XObjects
virtual void psXObject(Stream * /*psStream*/, Stream * /*level1Stream*/) {}
//----- Profiling
void startProfile();
std::unordered_map<std::string, ProfileData>* getProfileHash() const { return profileHash.get(); }
std::unique_ptr<std::unordered_map<std::string, ProfileData>> endProfile();
//----- transparency groups and soft masks
virtual bool checkTransparencyGroup(GfxState * /*state*/, bool /*knockout*/) { return true; }
virtual void beginTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/,
GfxColorSpace * /*blendingColorSpace*/,
bool /*isolated*/, bool /*knockout*/,
bool /*forSoftMask*/) {}
virtual void endTransparencyGroup(GfxState * /*state*/) {}
virtual void paintTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/) {}
virtual void setSoftMask(GfxState * /*state*/, const double * /*bbox*/, bool /*alpha*/,
Function * /*transferFunc*/, GfxColor * /*backdropColor*/) {}
virtual void clearSoftMask(GfxState * /*state*/) {}
//----- links
virtual void processLink(AnnotLink * /*link*/) {}
#if 1 //~tmp: turn off anti-aliasing temporarily
virtual bool getVectorAntialias() { return false; }
virtual void setVectorAntialias(bool /*vaa*/) {}
#ifdef USE_CMS
PopplerCache<Ref, GfxICCBasedColorSpace> *getIccColorSpaceCache() { return &iccColorSpaceCache; }
double defCTM[6]; // default coordinate transform matrix
double defICTM[6]; // inverse of default CTM
std::unique_ptr<std::unordered_map<std::string, ProfileData>> profileHash;
#ifdef USE_CMS
PopplerCache<Ref, GfxICCBasedColorSpace> iccColorSpaceCache;