1 2 /* 3 ******************************************************************************* 4 * 5 * © 2016 and later: Unicode, Inc. and others. 6 * License & terms of use: http://www.unicode.org/copyright.html#License 7 * 8 ******************************************************************************* 9 ******************************************************************************* 10 * 11 * Copyright (C) 1999-2013, International Business Machines 12 * Corporation and others. All Rights Reserved. 13 * 14 ******************************************************************************* 15 * file name: PortableFontInstance.h 16 * 17 * created on: 11/12/1999 18 * created by: Eric R. Mader 19 */ 20 21 #ifndef __PORTABLEFONTINSTANCE_H 22 #define __PORTABLEFONTINSTANCE_H 23 24 #include <stdio.h> 25 26 #include "layout/LETypes.h" 27 #include "layout/LEFontInstance.h" 28 29 #include "FontTableCache.h" 30 31 #include "sfnt.h" 32 #include "cmaps.h" 33 34 class PortableFontInstance : public LEFontInstance, protected FontTableCache 35 { 36 private: 37 FILE *fFile; 38 39 float fPointSize; 40 le_int32 fUnitsPerEM; 41 le_uint32 fFontChecksum; 42 le_int32 fAscent; 43 le_int32 fDescent; 44 le_int32 fLeading; 45 46 const SFNTDirectory *fDirectory; 47 le_uint16 fDirPower; 48 le_uint16 fDirExtra; 49 50 float fDeviceScaleX; 51 float fDeviceScaleY; 52 53 const NAMETable *fNAMETable; 54 le_uint16 fNameCount; 55 le_uint16 fNameStringOffset; 56 57 CMAPMapper *fCMAPMapper; 58 59 const HMTXTable *fHMTXTable; 60 le_uint16 fNumGlyphs; 61 le_uint16 fNumLongHorMetrics; 62 63 static le_int8 highBit(le_int32 value); 64 65 const DirectoryEntry *findTable(LETag tag) const; 66 const void *readTable(LETag tag, le_uint32 *length) const; 67 void getMetrics(); 68 69 CMAPMapper *findUnicodeMapper(); 70 71 protected: readFontTable(LETag tableTag)72 const void *readFontTable(LETag tableTag) const { size_t ignored; return readFontTable(tableTag, ignored); } 73 const void *readFontTable(LETag tableTag, size_t &length) const; 74 75 public: 76 PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status); 77 78 virtual ~PortableFontInstance(); 79 80 virtual const void *getFontTable(LETag tableTag) const; 81 virtual const void *getFontTable(LETag tableTag, size_t &length) const; 82 83 virtual const char *getNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const; 84 85 virtual const LEUnicode16 *getUnicodeNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const; 86 87 virtual void deleteNameString(const char *name) const; 88 89 virtual void deleteNameString(const LEUnicode16 *name) const; 90 91 virtual le_int32 getUnitsPerEM() const; 92 93 virtual le_uint32 getFontChecksum() const; 94 95 virtual le_uint32 getRawChecksum() const; 96 97 virtual le_int32 getAscent() const; 98 99 virtual le_int32 getDescent() const; 100 101 virtual le_int32 getLeading() const; 102 103 // We really want to inherit this method from the superclass, but some compilers 104 // issue a warning if we don't implement it... 105 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const; 106 107 // We really want to inherit this method from the superclass, but some compilers 108 // issue a warning if we don't implement it... 109 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const; 110 111 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const; 112 113 virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const; 114 115 virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const; 116 117 float getXPixelsPerEm() const; 118 119 float getYPixelsPerEm() const; 120 121 float getScaleFactorX() const; 122 123 float getScaleFactorY() const; 124 125 }; 126 127 #endif 128