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2 // License & terms of use: http://www.unicode.org/copyright.html

4 /*

5 *******************************************************************************

6 *

9 *

10 *******************************************************************************

11 * file name: PortableFontInstance.h

12 *

13 * created on: 11/12/1999

14 * created by: Eric R. Mader

15 */

17 #ifndef __PORTABLEFONTINSTANCE_H

18 #define __PORTABLEFONTINSTANCE_H

20 #include <stdio.h>

22 #include "layout/LETypes.h"

23 #include "layout/LEFontInstance.h"

25 #include "FontTableCache.h"

27 #include "sfnt.h"

28 #include "cmaps.h"

 class PortableFontInstance : public LEFontInstance, protected FontTableCache

31 {

32 private:

33 FILE *fFile;

35 float fPointSize;

36 le_int32 fUnitsPerEM;

37 le_uint32 fFontChecksum;

38 le_int32 fAscent;

39 le_int32 fDescent;

40 le_int32 fLeading;

42 const SFNTDirectory *fDirectory;

43 le_uint16 fDirPower;

44 le_uint16 fDirExtra;

46 float fDeviceScaleX;

47 float fDeviceScaleY;

49 const NAMETable *fNAMETable;

50 le_uint16 fNameCount;

51 le_uint16 fNameStringOffset;

53 CMAPMapper *fCMAPMapper;

55 const HMTXTable *fHMTXTable;

56 le_uint16 fNumGlyphs;

57 le_uint16 fNumLongHorMetrics;

59 static le_int8 highBit(le_int32 value);

     const DirectoryEntry *findTable(LETag tag) const;

     const void *readTable(LETag tag, le_uint32 *length) const;

63 void getMetrics();

65 CMAPMapper *findUnicodeMapper();

67 protected:

     const void *readFontTable(LETag tableTag) const { size_t ignored; return readFontTable(tableTag, ignored); }

     const void *readFontTable(LETag tableTag, size_t &length) const;

71 public:

     PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status);

74 virtual ~PortableFontInstance();

     virtual const void *getFontTable(LETag tableTag, size_t &length) const;

     virtual const char *getNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;

     virtual const LEUnicode16 *getUnicodeNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;

     virtual void deleteNameString(const char *name) const;

     virtual void deleteNameString(const LEUnicode16 *name) const;

     virtual le_int32 getUnitsPerEM() const;

     virtual le_uint32 getFontChecksum() const;

     virtual le_uint32 getRawChecksum() const;

     virtual le_int32 getAscent() const;

     virtual le_int32 getDescent() const;

     virtual le_int32 getLeading() const;

98 // We really want to inherit this method from the superclass, but some compilers

99 // issue a warning if we don't implement it...

     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...

     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;

119

120 };

121

122 #endif