1 // 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 4 /* 5 ******************************************************************************* 6 * 7 * Copyright (C) 1999-2015, International Business Machines 8 * Corporation and others. All Rights Reserved. 9 * 10 ******************************************************************************* 11 * file name: PortableFontInstance.h 12 * 13 * created on: 11/12/1999 14 * created by: Eric R. Mader 15 */ 16 17 #ifndef __PORTABLEFONTINSTANCE_H 18 #define __PORTABLEFONTINSTANCE_H 19 20 #include <stdio.h> 21 22 #include "layout/LETypes.h" 23 #include "layout/LEFontInstance.h" 24 25 #include "FontTableCache.h" 26 27 #include "sfnt.h" 28 #include "cmaps.h" 29 30 class PortableFontInstance : public LEFontInstance, protected FontTableCache 31 { 32 private: 33 FILE *fFile; 34 35 float fPointSize; 36 le_int32 fUnitsPerEM; 37 le_uint32 fFontChecksum; 38 le_int32 fAscent; 39 le_int32 fDescent; 40 le_int32 fLeading; 41 42 const SFNTDirectory *fDirectory; 43 le_uint16 fDirPower; 44 le_uint16 fDirExtra; 45 46 float fDeviceScaleX; 47 float fDeviceScaleY; 48 49 const NAMETable *fNAMETable; 50 le_uint16 fNameCount; 51 le_uint16 fNameStringOffset; 52 53 CMAPMapper *fCMAPMapper; 54 55 const HMTXTable *fHMTXTable; 56 le_uint16 fNumGlyphs; 57 le_uint16 fNumLongHorMetrics; 58 59 static le_int8 highBit(le_int32 value); 60 61 const DirectoryEntry *findTable(LETag tag) const; 62 const void *readTable(LETag tag, le_uint32 *length) const; 63 void getMetrics(); 64 65 CMAPMapper *findUnicodeMapper(); 66 67 protected: 68 const void *readFontTable(LETag tableTag) const { size_t ignored; return readFontTable(tableTag, ignored); } 69 const void *readFontTable(LETag tableTag, size_t &length) const; 70 71 public: 72 PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status); 73 74 virtual ~PortableFontInstance(); 75 76 virtual const void *getFontTable(LETag tableTag, size_t &length) const; 77 78 virtual const char *getNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const; 79 80 virtual const LEUnicode16 *getUnicodeNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const; 81 82 virtual void deleteNameString(const char *name) const; 83 84 virtual void deleteNameString(const LEUnicode16 *name) const; 85 86 virtual le_int32 getUnitsPerEM() const; 87 88 virtual le_uint32 getFontChecksum() const; 89 90 virtual le_uint32 getRawChecksum() const; 91 92 virtual le_int32 getAscent() const; 93 94 virtual le_int32 getDescent() const; 95 96 virtual le_int32 getLeading() const; 97 98 // We really want to inherit this method from the superclass, but some compilers 99 // issue a warning if we don't implement it... 100 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const; 101 102 // We really want to inherit this method from the superclass, but some compilers 103 // issue a warning if we don't implement it... 104 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const; 105 106 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const; 107 108 virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const; 109 110 virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const; 111 112 float getXPixelsPerEm() const; 113 114 float getYPixelsPerEm() const; 115 116 float getScaleFactorX() const; 117 118 float getScaleFactorY() const; 119 120 }; 121 122 #endif 123
