+++ /dev/null
-//========================================================================
-//
-// GfxFont.h
-//
-// Copyright 1996-2003 Glyph & Cog, LLC
-//
-//========================================================================
-
-#ifndef GFXFONT_H
-#define GFXFONT_H
-
-#include <aconf.h>
-
-#ifdef USE_GCC_PRAGMAS
-#pragma interface
-#endif
-
-#include "gtypes.h"
-#include "GString.h"
-#include "Object.h"
-#include "CharTypes.h"
-
-class Dict;
-class CMap;
-class CharCodeToUnicode;
-class FoFiTrueType;
-struct GfxFontCIDWidths;
-
-//------------------------------------------------------------------------
-// GfxFontType
-//------------------------------------------------------------------------
-
-enum GfxFontType {
- //----- Gfx8BitFont
- fontUnknownType,
- fontType1,
- fontType1C,
- fontType3,
- fontTrueType,
- //----- GfxCIDFont
- fontCIDType0,
- fontCIDType0C,
- fontCIDType2
-};
-
-//------------------------------------------------------------------------
-// GfxFontCIDWidths
-//------------------------------------------------------------------------
-
-struct GfxFontCIDWidthExcep {
- CID first; // this record applies to
- CID last; // CIDs <first>..<last>
- double width; // char width
-};
-
-struct GfxFontCIDWidthExcepV {
- CID first; // this record applies to
- CID last; // CIDs <first>..<last>
- double height; // char height
- double vx, vy; // origin position
-};
-
-struct GfxFontCIDWidths {
- double defWidth; // default char width
- double defHeight; // default char height
- double defVY; // default origin position
- GfxFontCIDWidthExcep *exceps; // exceptions
- int nExceps; // number of valid entries in exceps
- GfxFontCIDWidthExcepV * // exceptions for vertical font
- excepsV;
- int nExcepsV; // number of valid entries in excepsV
-};
-
-//------------------------------------------------------------------------
-// GfxFont
-//------------------------------------------------------------------------
-
-#define fontFixedWidth (1 << 0)
-#define fontSerif (1 << 1)
-#define fontSymbolic (1 << 2)
-#define fontItalic (1 << 6)
-#define fontBold (1 << 18)
-
-class GfxFont {
-public:
-
- // Build a GfxFont object.
- static GfxFont *makeFont(XRef *xref, char *tagA, Ref idA, Dict *fontDict);
-
- GfxFont(char *tagA, Ref idA, GString *nameA);
-
- virtual ~GfxFont();
-
- GBool isOk() { return ok; }
-
- // Get font tag.
- GString *getTag() { return tag; }
-
- // Get font dictionary ID.
- Ref *getID() { return &id; }
-
- // Does this font match the tag?
- GBool matches(char *tagA) { return !tag->cmp(tagA); }
-
- // Get base font name.
- GString *getName() { return name; }
-
- // Get the original font name (ignornig any munging that might have
- // been done to map to a canonical Base-14 font name).
- GString *getOrigName() { return origName; }
-
- // Get font type.
- GfxFontType getType() { return type; }
- virtual GBool isCIDFont() { return gFalse; }
-
- // 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.
- GString *getEmbeddedFontName() { return embFontName; }
-
- // Get the name of the external font file. Returns NULL if there
- // is no external font file.
- GString *getExtFontFile() { return extFontFile; }
-
- // 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; }
-
- // Return the font matrix.
- double *getFontMatrix() { return fontMat; }
-
- // Return the font bounding box.
- double *getFontBBox() { return fontBBox; }
-
- // Return the ascent and descent values.
- double getAscent() { return ascent; }
- double getDescent() { return descent; }
-
- // Return the writing mode (0=horizontal, 1=vertical).
- virtual int getWMode() { return 0; }
-
- // Read an external or embedded font file into a buffer.
- char *readExtFontFile(int *len);
- char *readEmbFontFile(XRef *xref, int *len);
-
- // Get the next char from a string <s> of <len> bytes, returning the
- // char <code>, its Unicode mapping <u>, its displacement vector
- // (<dx>, <dy>), and its origin offset vector (<ox>, <oy>). <uSize>
- // is the number of entries available in <u>, and <uLen> is set to
- // the number actually used. Returns the number of bytes used by
- // the char code.
- virtual int getNextChar(char *s, int len, CharCode *code,
- Unicode *u, int uSize, int *uLen,
- double *dx, double *dy, double *ox, double *oy) = 0;
-
-protected:
-
- void readFontDescriptor(XRef *xref, Dict *fontDict);
- CharCodeToUnicode *readToUnicodeCMap(Dict *fontDict, int nBits,
- CharCodeToUnicode *ctu);
- void findExtFontFile();
-
- GString *tag; // PDF font tag
- Ref id; // reference (used as unique ID)
- GString *name; // font name
- GString *origName; // original font name
- GfxFontType type; // type of font
- int flags; // font descriptor flags
- 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 (Type 3 only)
- double fontBBox[4]; // font bounding box (Type 3 only)
- double missingWidth; // "default" width
- double ascent; // max height above baseline
- double descent; // max depth below baseline
- GBool ok;
-};
-
-//------------------------------------------------------------------------
-// Gfx8BitFont
-//------------------------------------------------------------------------
-
-class Gfx8BitFont: public GfxFont {
-public:
-
- Gfx8BitFont(XRef *xref, char *tagA, Ref idA, GString *nameA,
- GfxFontType typeA, Dict *fontDict);
-
- virtual ~Gfx8BitFont();
-
- virtual int getNextChar(char *s, int len, CharCode *code,
- Unicode *u, int uSize, int *uLen,
- double *dx, double *dy, double *ox, double *oy);
-
- // Return the encoding.
- char **getEncoding() { return enc; }
-
- // Return the Unicode map.
- CharCodeToUnicode *getToUnicode();
-
- // Return the character name associated with <code>.
- char *getCharName(int code) { return code>=256?0:enc[code]; }
-
- // Returns true if the PDF font specified an encoding.
- GBool getHasEncoding() { return hasEncoding; }
-
- // Returns true if the PDF font specified MacRomanEncoding.
- GBool getUsesMacRomanEnc() { return usesMacRomanEnc; }
-
- // Get width of a character.
- double getWidth(Guchar c) { return widths[c]; }
-
- // Return a char code-to-GID mapping for the provided font file.
- // (This is only useful for TrueType fonts.)
- Gushort *getCodeToGIDMap(FoFiTrueType *ff);
-
- // Return the Type 3 CharProc dictionary, or NULL if none.
- Dict *getCharProcs();
-
- // Return the Type 3 CharProc for the character associated with <code>.
- Object *getCharProc(int code, Object *proc);
-
- // Return the Type 3 Resources dictionary, or NULL if none.
- Dict *getResources();
-
-private:
-
- char *enc[256]; // char code --> char name
- char encFree[256]; // boolean for each char name: if set,
- // the string is malloc'ed
- CharCodeToUnicode *ctu; // char code --> Unicode
- GBool hasEncoding;
- GBool usesMacRomanEnc;
- double widths[256]; // character widths
- Object charProcs; // Type 3 CharProcs dictionary
- Object resources; // Type 3 Resources dictionary
-};
-
-//------------------------------------------------------------------------
-// GfxCIDFont
-//------------------------------------------------------------------------
-
-class GfxCIDFont: public GfxFont {
-public:
-
- GfxCIDFont(XRef *xref, char *tagA, Ref idA, GString *nameA,
- Dict *fontDict);
-
- virtual ~GfxCIDFont();
-
- virtual GBool isCIDFont() { return gTrue; }
-
- virtual int getNextChar(char *s, int len, CharCode *code,
- Unicode *u, int uSize, int *uLen,
- double *dx, double *dy, double *ox, double *oy);
-
- // Return the writing mode (0=horizontal, 1=vertical).
- virtual int getWMode();
-
- // Return the Unicode map.
- CharCodeToUnicode *getToUnicode();
-
- // Get the collection name (<registry>-<ordering>).
- GString *getCollection();
-
- // Return the CID-to-GID mapping table. These should only be called
- // if type is fontCIDType2.
- Gushort *getCIDToGID() { return cidToGID; }
- int getCIDToGIDLen() { return cidToGIDLen; }
-
-private:
-
- CMap *cMap; // char code --> CID
- CharCodeToUnicode *ctu; // CID --> Unicode
- GfxFontCIDWidths widths; // character widths
- Gushort *cidToGID; // CID --> GID mapping (for embedded
- // TrueType fonts)
- int cidToGIDLen;
-};
-
-//------------------------------------------------------------------------
-// GfxFontDict
-//------------------------------------------------------------------------
-
-class GfxFontDict {
-public:
-
- // Build the font dictionary, given the PDF font dictionary.
- GfxFontDict(XRef *xref, Ref *fontDictRef, 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
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