3 *******************************************************************************
5 * Copyright (C) 1999-2013, International Business Machines
6 * Corporation and others. All Rights Reserved.
8 *******************************************************************************
9 * file name: PortableFontInstance.h
11 * created on: 11/12/1999
12 * created by: Eric R. Mader
15 #ifndef __PORTABLEFONTINSTANCE_H
16 #define __PORTABLEFONTINSTANCE_H
20 #include "layout/LETypes.h"
21 #include "layout/LEFontInstance.h"
23 #include "FontTableCache.h"
28 class PortableFontInstance : public LEFontInstance, protected FontTableCache
35 le_uint32 fFontChecksum;
40 const SFNTDirectory *fDirectory;
47 const NAMETable *fNAMETable;
49 le_uint16 fNameStringOffset;
51 CMAPMapper *fCMAPMapper;
53 const HMTXTable *fHMTXTable;
55 le_uint16 fNumLongHorMetrics;
57 static le_int8 highBit(le_int32 value);
59 const DirectoryEntry *findTable(LETag tag) const;
60 const void *readTable(LETag tag, le_uint32 *length) const;
63 CMAPMapper *findUnicodeMapper();
66 const void *readFontTable(LETag tableTag) const { size_t ignored; return readFontTable(tableTag, ignored); }
67 const void *readFontTable(LETag tableTag, size_t &length) const;
70 PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status);
72 virtual ~PortableFontInstance();
74 virtual const void *getFontTable(LETag tableTag) const;
75 virtual const void *getFontTable(LETag tableTag, size_t &length) const;
77 virtual const char *getNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;
79 virtual const LEUnicode16 *getUnicodeNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;
81 virtual void deleteNameString(const char *name) const;
83 virtual void deleteNameString(const LEUnicode16 *name) const;
85 virtual le_int32 getUnitsPerEM() const;
87 virtual le_uint32 getFontChecksum() const;
89 virtual le_uint32 getRawChecksum() const;
91 virtual le_int32 getAscent() const;
93 virtual le_int32 getDescent() const;
95 virtual le_int32 getLeading() const;
97 // We really want to inherit this method from the superclass, but some compilers
98 // issue a warning if we don't implement it...
99 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const;
101 // We really want to inherit this method from the superclass, but some compilers
102 // issue a warning if we don't implement it...
103 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const;
105 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
107 virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
109 virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
111 float getXPixelsPerEm() const;
113 float getYPixelsPerEm() const;
115 float getScaleFactorX() const;
117 float getScaleFactorY() const;