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1 files changed, 245 insertions, 0 deletions

diff --git a/pdf/xpdf/GfxFont.h b/pdf/xpdf/GfxFont.h
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+//========================================================================
+//
+// GfxFont.h
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifndef GFXFONT_H
+#define GFXFONT_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include "gtypes.h"
+#include "GString.h"
+#include "Object.h"
+
+class Dict;
+
+//------------------------------------------------------------------------
+// GfxFontEncoding
+//------------------------------------------------------------------------
+
+#define gfxFontEncHashSize 419
+
+class GfxFontEncoding {
+public:
+
+  // Construct an empty encoding.
+  GfxFontEncoding();
+
+  // Construct an encoding from an array of char names.
+  GfxFontEncoding(char **encoding1, int encSize);
+
+  // Destructor.
+  ~GfxFontEncoding();
+
+  // Add a char to the encoding.
+  void addChar(int code, char *name);
+
+  // Return the character name associated with <code>.
+  char *getCharName(int code) { return encoding[code]; }
+
+  // Return the code associated with <name>.
+  int getCharCode(char *name);
+
+private:
+
+  int hash(char *name);
+  void addChar1(int code, char *name);
+
+  char **encoding;		// code --> name mapping
+  GBool freeEnc;		// should we free the encoding array?
+  short				// name --> code hash table
+    hashTab[gfxFontEncHashSize];
+};
+
+//------------------------------------------------------------------------
+// GfxFontCharSet16
+//------------------------------------------------------------------------
+
+enum GfxFontCharSet16 {
+  font16AdobeJapan12			// Adobe-Japan1-2
+};
+
+//------------------------------------------------------------------------
+// GfxFontEncoding16
+//------------------------------------------------------------------------
+
+struct GfxFontEncoding16 {
+  Guchar codeLen[256];		// length of codes, in bytes, indexed by
+				//   first byte of code
+  Gushort map1[256];		// one-byte code mapping:
+				//   map1[code] --> 16-bit char selector
+  Gushort *map2;		// two-byte code mapping
+				//   map2[2*i]   --> first code in range
+				//   map2[2*i+1] --> 16-bit char selector
+				//                   for map2[2*i]
+  int map2Len;			// length of map2 array (divided by 2)
+};
+
+//------------------------------------------------------------------------
+// GfxFontWidths16
+//------------------------------------------------------------------------
+
+struct GfxFontWidthExcep {
+  int first;			// chars <first>..<last> have
+  int last;			//   width <width>
+  double width;
+};
+
+struct GfxFontWidths16 {
+  double defWidth;		// default char width
+  GfxFontWidthExcep *exceps;	// exceptions
+  int numExceps;		// number of valid entries in exceps
+};
+
+//------------------------------------------------------------------------
+// GfxFont
+//------------------------------------------------------------------------
+
+#define fontFixedWidth (1 << 0)
+#define fontSerif      (1 << 1)
+#define fontSymbolic   (1 << 2)
+#define fontItalic     (1 << 6)
+#define fontBold       (1 << 18)
+
+enum GfxFontType {
+  fontUnknownType,
+  fontType1,
+  fontType3,
+  fontTrueType,
+  fontType0
+};
+
+class GfxFont {
+public:
+
+  // Constructor.
+  GfxFont(char *tag1, Ref id1, Dict *fontDict);
+
+  // Destructor.
+  ~GfxFont();
+
+  // Get font tag.
+  GString *getTag() { return tag; }
+
+  // Get font dictionary ID.
+  Ref getID() { return id; }
+
+  // Does this font match the tag?
+  GBool matches(char *tag1) { return !tag->cmp(tag1); }
+
+  // Get base font name.
+  GString *getName() { return name; }
+
+  // Get font type.
+  GfxFontType getType() { return type; }
+
+  // Does this font use 16-bit characters?
+  GBool is16Bit() { return is16; }
+
+  // Get embedded font ID, i.e., a ref for the font file stream.
+  // Returns false if there is no embedded font.
+  GBool getEmbeddedFontID(Ref *embID)
+    { *embID = embFontID; return embFontID.num >= 0; }
+
+  // Get the PostScript font name for the embedded font.  Returns
+  // NULL if there is no embedded font.
+  char *getEmbeddedFontName()
+    { return embFontName ? embFontName->getCString() : (char *)NULL; }
+
+  // Get the name of the external font file.  Returns NULL if there
+  // is no external font file.
+  char *getExtFontFile()
+    { return extFontFile ? extFontFile->getCString() : (char *)NULL; }
+
+  // Get font descriptor flags.
+  GBool isFixedWidth() { return flags & fontFixedWidth; }
+  GBool isSerif() { return flags & fontSerif; }
+  GBool isSymbolic() { return flags & fontSymbolic; }
+  GBool isItalic() { return flags & fontItalic; }
+  GBool isBold() { return flags & fontBold; }
+
+  // Get width of a character or string.
+  double getWidth(Guchar c) { return widths[c]; }
+  double getWidth(GString *s);
+  double getWidth16(int c);
+  double getWidth16(GString *s);
+
+  // Return the character name associated with <code>.
+  char *getCharName(int code) { return encoding->getCharName(code); }
+
+  // Return the code associated with <name>.
+  int getCharCode(char *charName) { return encoding->getCharCode(charName); }
+
+  // Return the 16-bit character set and encoding.
+  GfxFontCharSet16 getCharSet16() { return enc16.charSet; }
+  GfxFontEncoding16 *getEncoding16() { return enc16.enc; }
+
+  // Return the font matrix.
+  double *getFontMatrix() { return fontMat; }
+
+private:
+
+  void makeEncoding(Dict *fontDict, GfxFontEncoding *builtinEncoding);
+  GfxFontEncoding *makeEncoding1(Object obj, Dict *fontDesc,
+				 GfxFontEncoding *builtinEncoding);
+  void getType1Encoding(Stream *str);
+  void makeWidths(Dict *fontDict, GfxFontEncoding *builtinEncoding,
+		  Gushort *builtinWidths);
+  void getType0EncAndWidths(Dict *fontDict);
+
+  GString *tag;			// PDF font tag
+  Ref id;			// reference (used as unique ID)
+  GString *name;		// font name
+  int flags;			// font descriptor flags
+  GfxFontType type;		// type of font
+  GBool is16;			// set if font uses 16-bit chars
+  GString *embFontName;		// name of embedded font
+  Ref embFontID;		// ref to embedded font file stream
+  GString *extFontFile;		// external font file name
+  double fontMat[6];		// font matrix
+  union {
+    GfxFontEncoding *encoding;	// 8-bit font encoding
+    struct {
+      GfxFontCharSet16 charSet;	// 16-bit character set
+      GfxFontEncoding16 *enc;	// 16-bit encoding (CMap)
+    } enc16;
+  };
+  union {
+    double widths[256];		// width of each char for 8-bit font
+    GfxFontWidths16 widths16;	// char widths for 16-bit font
+  };
+};
+
+//------------------------------------------------------------------------
+// GfxFontDict
+//------------------------------------------------------------------------
+
+class GfxFontDict {
+public:
+
+  // Build the font dictionary, given the PDF font dictionary.
+  GfxFontDict(Dict *fontDict);
+
+  // Destructor.
+  ~GfxFontDict();
+
+  // Get the specified font.
+  GfxFont *lookup(char *tag);
+
+  // Iterative access.
+  int getNumFonts() { return numFonts; }
+  GfxFont *getFont(int i) { return fonts[i]; }
+
+private:
+
+  GfxFont **fonts;		// list of fonts
+  int numFonts;			// number of fonts
+};
+
+#endif