| |
| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 1999-2001, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: PortableFontInstance.h |
| * |
| * created on: 11/12/1999 |
| * created by: Eric R. Mader |
| */ |
| |
| #ifndef __PORTABLEFONTINSTANCE_H |
| #define __PORTABLEFONTINSTANCE_H |
| |
| #include <stdio.h> |
| |
| #include "LETypes.h" |
| #include "LEFontInstance.h" |
| |
| #include "sfnt.h" |
| #include "cmaps.h" |
| |
| #define TABLE_CACHE_INIT 5 |
| #define TABLE_CACHE_GROW 5 |
| |
| struct TableCacheEntry |
| { |
| LETag tag; |
| void *table; |
| }; |
| |
| enum PFIErrorCode { |
| PFI_NO_ERROR = 0, |
| |
| PFI_FONT_FILE_NOT_FOUND_ERROR = 1, |
| PFI_MISSING_FONT_TABLE_ERROR = 2, |
| PFI_OUT_OF_MEMORY_ERROR = 3 |
| }; |
| |
| #ifndef XP_CPLUSPLUS |
| typedef enum PFIErrorCode PFIErrorCode; |
| #endif |
| |
| class PortableFontInstance : public LEFontInstance |
| { |
| private: |
| FILE *fFile; |
| |
| float fUnitsPerEM; |
| float fPointSize; |
| |
| const SFNTDirectory *fDirectory; |
| le_uint16 fDirPower; |
| le_uint16 fDirExtra; |
| |
| TableCacheEntry *fTableCache; |
| le_int32 fTableCacheCurr; |
| le_int32 fTableCacheSize; |
| |
| CMAPMapper *fCMAPMapper; |
| |
| const HMTXTable *fHMTXTable; |
| le_uint16 fNumGlyphs; |
| le_uint16 fNumLongHorMetrics; |
| |
| static le_int8 highBit(le_int32 value); |
| |
| PFIErrorCode PortableFontInstance::initFontTableCache(); |
| void PortableFontInstance::flushFontTableCache(); |
| |
| const DirectoryEntry *findTable(LETag tag) const; |
| const void *readTable(LETag tag, le_uint32 *length) const; |
| void deleteTable(const void *table) const; |
| |
| CMAPMapper *PortableFontInstance::findUnicodeMapper(); |
| |
| public: |
| PortableFontInstance(char *fileName, float pointSize, PFIErrorCode &status); |
| |
| virtual ~PortableFontInstance(); |
| |
| virtual const void *getFontTable(LETag tableTag) const; |
| |
| virtual le_bool canDisplay(LEUnicode32 ch) const |
| { |
| return (le_bool) fCMAPMapper->unicodeToGlyph(ch) != 0; |
| }; |
| |
| virtual le_int32 getUnitsPerEM() const |
| { |
| return (le_int32) fUnitsPerEM; |
| }; |
| |
| virtual le_int32 getLineHeight() const |
| { |
| // this is a cheap hack!! |
| return (le_int32) fPointSize; |
| }; |
| |
| virtual void mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, const LECharMapper *mapper, LEGlyphID glyphs[]) const; |
| |
| virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const; |
| |
| virtual le_int32 getName(le_uint16 platformID, le_uint16 scriptID, le_uint16 languageID, le_uint16 nameID, LEUnicode *name) const |
| { |
| // This is only used for CDAC fonts, and we'll have to loose that support anyhow... |
| //return (le_int32) fFontObject->getName(platformID, scriptID, languageID, nameID, name); |
| if (name != NULL) { |
| *name = 0; |
| } |
| |
| return 0; |
| }; |
| |
| virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const; |
| |
| virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const; |
| |
| float getXPixelsPerEm() const |
| { |
| return fPointSize; |
| }; |
| |
| float getYPixelsPerEm() const |
| { |
| return fPointSize; |
| }; |
| |
| float xUnitsToPoints(float xUnits) const |
| { |
| return (xUnits * fPointSize) / fUnitsPerEM; |
| }; |
| |
| float yUnitsToPoints(float yUnits) const |
| { |
| return (yUnits * fPointSize) / fUnitsPerEM; |
| }; |
| |
| void unitsToPoints(LEPoint &units, LEPoint &points) const |
| { |
| points.fX = xUnitsToPoints(units.fX); |
| points.fY = yUnitsToPoints(units.fY); |
| } |
| |
| float xPixelsToUnits(float xPixels) const |
| { |
| return (xPixels * fUnitsPerEM) / fPointSize; |
| }; |
| |
| float yPixelsToUnits(float yPixels) const |
| { |
| return (yPixels * fUnitsPerEM) / fPointSize; |
| }; |
| |
| void pixelsToUnits(LEPoint &pixels, LEPoint &units) const |
| { |
| units.fX = xPixelsToUnits(pixels.fX); |
| units.fY = yPixelsToUnits(pixels.fY); |
| }; |
| |
| void transformFunits(float xFunits, float yFunits, LEPoint &pixels) const; |
| }; |
| |
| #endif |