Initial revision

1 files changed, 214 insertions, 0 deletions

diff --git a/pdf/xpdf/Gfx.h b/pdf/xpdf/Gfx.h
new file mode 100644
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+++ b/pdf/xpdf/Gfx.h
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+//========================================================================
+//
+// Gfx.h
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifndef GFX_H
+#define GFX_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include "gtypes.h"
+
+class GString;
+class Array;
+class Stream;
+class Parser;
+class Dict;
+class OutputDev;
+class GfxFontDict;
+class GfxFont;
+struct GfxFontEncoding16;
+class GfxState;
+class Gfx;
+
+//------------------------------------------------------------------------
+// Gfx
+//------------------------------------------------------------------------
+
+enum GfxClipType {
+  clipNone,
+  clipNormal,
+  clipEO
+};
+
+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 8
+
+struct Operator {
+  char name[4];
+  int numArgs;
+  TchkType tchk[maxArgs];
+  void (Gfx::*func)(Object args[], int numArgs);
+};
+
+class GfxResources {
+public:
+
+  GfxResources(GfxResources *next1) { next = next1; }
+  ~GfxResources();
+
+  GfxFontDict *fonts;
+  Object xObjDict;
+  Object colorSpaceDict;
+  GfxResources *next;
+};
+
+class Gfx {
+public:
+
+  // Constructor for regular output.
+  Gfx(OutputDev *out1, int pageNum, Dict *resDict,
+      int dpi, double x1, double y1, double x2, double y2, GBool crop,
+      double cropX1, double cropY1, double cropX2, double cropY2,
+      int rotate);
+
+  // Destructor.
+  ~Gfx();
+
+  // Interpret a stream or array of streams.
+  void display(Object *obj);
+
+private:
+
+  OutputDev *out;		// output device
+  GfxResources *res;		// resource stack
+
+  GfxState *state;		// current graphics state
+  GBool fontChanged;		// set if font or text matrix has changed
+  GfxClipType clip;		// do a clip?
+  int ignoreUndef;		// current BX/EX nesting level
+
+  Parser *parser;		// parser for page content stream(s)
+
+  static Operator opTab[];	// table of operators
+
+  void go();
+  void execOp(Object *cmd, Object args[], int numArgs);
+  Operator *findOp(char *name);
+  GBool checkArg(Object *arg, TchkType type);
+  int getPos();
+  GfxFont *lookupFont(char *name);
+  GBool lookupXObject(char *name, Object *obj);
+  void lookupColorSpace(char *name, Object *obj);
+
+  // 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);
+
+  // 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 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(GString *s);
+  int getNextChar16(GfxFontEncoding16 *enc, Guchar *p, int *c16);
+
+  // XObject operators
+  void opXObject(Object args[], int numArgs);
+  void doImage(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);
+};
+
+#endif