pdftops/Gfx.h

   1 //========================================================================
   2 //
   3 // Gfx.h
   4 //
   5 // Copyright 1996 Derek B. Noonburg
   6 //
   7 //========================================================================
   8
   9 #ifndef GFX_H
  10 #define GFX_H
  11
  12 #ifdef __GNUC__
  13 #pragma interface
  14 #endif
  15
  16 #include "gtypes.h"
  17
  18 class GString;
  19 class XRef;
  20 class Array;
  21 class Stream;
  22 class Parser;
  23 class Dict;
  24 class OutputDev;
  25 class GfxFontDict;
  26 class GfxFont;
  27 struct GfxFontEncoding16;
  28 class GfxPattern;
  29 class GfxShading;
  30 class GfxAxialShading;
  31 class GfxState;
  32 class Gfx;
  33 struct PDFRectangle;
  34
  35 //------------------------------------------------------------------------
  36 // Gfx
  37 //------------------------------------------------------------------------
  38
  39 enum GfxClipType {
  40   clipNone,
  41   clipNormal,
  42   clipEO
  43 };
  44
  45 enum TchkType {
  46   tchkBool,                     // boolean
  47   tchkInt,                      // integer
  48   tchkNum,                      // number (integer or real)
  49   tchkString,                   // string
  50   tchkName,                     // name
  51   tchkArray,                    // array
  52   tchkProps,                    // properties (dictionary or name)
  53   tchkSCN,                      // scn/SCN args (number of name)
  54   tchkNone                      // used to avoid empty initializer lists
  55 };
  56
  57 #define maxArgs 8
  58
  59 struct Operator {
  60   char name[4];
  61   int numArgs;
  62   TchkType tchk[maxArgs];
  63   void (Gfx::*func)(Object args[], int numArgs);
  64 };
  65
  66 class GfxResources {
  67 public:
  68
  69   GfxResources(XRef *xref, Dict *resDict, GfxResources *nextA);
  70   ~GfxResources();
  71
  72   GfxFont *lookupFont(char *name);
  73   GBool lookupXObject(char *name, Object *obj);
  74   GBool lookupXObjectNF(char *name, Object *obj);
  75   void lookupColorSpace(char *name, Object *obj);
  76   GfxPattern *lookupPattern(char *name);
  77   GfxShading *lookupShading(char *name);
  78   GBool lookupGState(char *name, Object *obj);
  79
  80   GfxResources *getNext() { return next; }
  81
  82 private:
  83
  84   GfxFontDict *fonts;
  85   Object xObjDict;
  86   Object colorSpaceDict;
  87   Object patternDict;
  88   Object shadingDict;
  89   Object gStateDict;
  90   GfxResources *next;
  91 };
  92
  93 class Gfx {
  94 public:
  95
  96   // Constructor for regular output.
  97   Gfx(XRef *xrefA, OutputDev *outA, int pageNum, Dict *resDict, double dpi,
  98       PDFRectangle *box, GBool crop, PDFRectangle *cropBox, int rotate,
  99       GBool printCommandsA);
 100
 101   // Destructor.
 102   ~Gfx();
 103
 104   // Interpret a stream or array of streams.
 105   void display(Object *obj, GBool topLevel = gTrue);
 106
 107   void doWidgetForm(Object *str, double xMin, double yMin,
 108                     double xMax, double yMax);
 109
 110 private:
 111
 112   XRef *xref;                   // the xref table for this PDF file
 113   OutputDev *out;               // output device
 114   GBool printCommands;          // print the drawing commands (for debugging)
 115   GfxResources *res;            // resource stack
 116
 117   GfxState *state;              // current graphics state
 118   GBool fontChanged;            // set if font or text matrix has changed
 119   GfxClipType clip;             // do a clip?
 120   int ignoreUndef;              // current BX/EX nesting level
 121   double baseMatrix[6];         // default matrix for most recent
 122                                 //   page/form/pattern
 123
 124   Parser *parser;               // parser for page content stream(s)
 125
 126   static Operator opTab[];      // table of operators
 127
 128   void go(GBool topLevel);
 129   void execOp(Object *cmd, Object args[], int numArgs);
 130   Operator *findOp(char *name);
 131   GBool checkArg(Object *arg, TchkType type);
 132   int getPos();
 133
 134   // graphics state operators
 135   void opSave(Object args[], int numArgs);
 136   void opRestore(Object args[], int numArgs);
 137   void opConcat(Object args[], int numArgs);
 138   void opSetDash(Object args[], int numArgs);
 139   void opSetFlat(Object args[], int numArgs);
 140   void opSetLineJoin(Object args[], int numArgs);
 141   void opSetLineCap(Object args[], int numArgs);
 142   void opSetMiterLimit(Object args[], int numArgs);
 143   void opSetLineWidth(Object args[], int numArgs);
 144   void opSetExtGState(Object args[], int numArgs);
 145   void opSetRenderingIntent(Object args[], int numArgs);
 146
 147   // color operators
 148   void opSetFillGray(Object args[], int numArgs);
 149   void opSetStrokeGray(Object args[], int numArgs);
 150   void opSetFillCMYKColor(Object args[], int numArgs);
 151   void opSetStrokeCMYKColor(Object args[], int numArgs);
 152   void opSetFillRGBColor(Object args[], int numArgs);
 153   void opSetStrokeRGBColor(Object args[], int numArgs);
 154   void opSetFillColorSpace(Object args[], int numArgs);
 155   void opSetStrokeColorSpace(Object args[], int numArgs);
 156   void opSetFillColor(Object args[], int numArgs);
 157   void opSetStrokeColor(Object args[], int numArgs);
 158   void opSetFillColorN(Object args[], int numArgs);
 159   void opSetStrokeColorN(Object args[], int numArgs);
 160
 161   // path segment operators
 162   void opMoveTo(Object args[], int numArgs);
 163   void opLineTo(Object args[], int numArgs);
 164   void opCurveTo(Object args[], int numArgs);
 165   void opCurveTo1(Object args[], int numArgs);
 166   void opCurveTo2(Object args[], int numArgs);
 167   void opRectangle(Object args[], int numArgs);
 168   void opClosePath(Object args[], int numArgs);
 169
 170   // path painting operators
 171   void opEndPath(Object args[], int numArgs);
 172   void opStroke(Object args[], int numArgs);
 173   void opCloseStroke(Object args[], int numArgs);
 174   void opFill(Object args[], int numArgs);
 175   void opEOFill(Object args[], int numArgs);
 176   void opFillStroke(Object args[], int numArgs);
 177   void opCloseFillStroke(Object args[], int numArgs);
 178   void opEOFillStroke(Object args[], int numArgs);
 179   void opCloseEOFillStroke(Object args[], int numArgs);
 180   void doPatternFill(GBool eoFill);
 181   void opShFill(Object args[], int numArgs);
 182   void doAxialShFill(GfxAxialShading *shading);
 183   void doEndPath();
 184
 185   // path clipping operators
 186   void opClip(Object args[], int numArgs);
 187   void opEOClip(Object args[], int numArgs);
 188
 189   // text object operators
 190   void opBeginText(Object args[], int numArgs);
 191   void opEndText(Object args[], int numArgs);
 192
 193   // text state operators
 194   void opSetCharSpacing(Object args[], int numArgs);
 195   void opSetFont(Object args[], int numArgs);
 196   void opSetTextLeading(Object args[], int numArgs);
 197   void opSetTextRender(Object args[], int numArgs);
 198   void opSetTextRise(Object args[], int numArgs);
 199   void opSetWordSpacing(Object args[], int numArgs);
 200   void opSetHorizScaling(Object args[], int numArgs);
 201
 202   // text positioning operators
 203   void opTextMove(Object args[], int numArgs);
 204   void opTextMoveSet(Object args[], int numArgs);
 205   void opSetTextMatrix(Object args[], int numArgs);
 206   void opTextNextLine(Object args[], int numArgs);
 207
 208   // text string operators
 209   void opShowText(Object args[], int numArgs);
 210   void opMoveShowText(Object args[], int numArgs);
 211   void opMoveSetShowText(Object args[], int numArgs);
 212   void opShowSpaceText(Object args[], int numArgs);
 213   void doShowText(GString *s);
 214   int getNextChar16(GfxFontEncoding16 *enc, Guchar *p, int *c16);
 215
 216   // XObject operators
 217   void opXObject(Object args[], int numArgs);
 218   void doImage(Object *ref, Stream *str, GBool inlineImg);
 219   void doForm(Object *str);
 220   void doForm1(Object *str, Dict *resDict, double *matrix, double *bbox);
 221
 222   // in-line image operators
 223   void opBeginImage(Object args[], int numArgs);
 224   Stream *buildImageStream();
 225   void opImageData(Object args[], int numArgs);
 226   void opEndImage(Object args[], int numArgs);
 227
 228   // type 3 font operators
 229   void opSetCharWidth(Object args[], int numArgs);
 230   void opSetCacheDevice(Object args[], int numArgs);
 231
 232   // compatibility operators
 233   void opBeginIgnoreUndef(Object args[], int numArgs);
 234   void opEndIgnoreUndef(Object args[], int numArgs);
 235
 236   // marked content operators
 237   void opBeginMarkedContent(Object args[], int numArgs);
 238   void opEndMarkedContent(Object args[], int numArgs);
 239   void opMarkPoint(Object args[], int numArgs);
 240 };
 241
 242 #endif