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00008 #ifndef __LEFONTINSTANCE_H
00009 #define __LEFONTINSTANCE_H
00010
00011 #include "LETypes.h"
00017 U_NAMESPACE_BEGIN
00018
00028 class LECharMapper
00029 {
00030 public:
00035 virtual ~LECharMapper();
00036
00046 virtual LEUnicode32 mapChar(LEUnicode32 ch) const = 0;
00047 };
00048
00055 class LEGlyphStorage;
00056
00081 class U_LAYOUT_API LEFontInstance : public UObject
00082 {
00083 public:
00084
00091 virtual ~LEFontInstance();
00092
00144 virtual const LEFontInstance *getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit, le_int32 script, LEErrorCode &success) const;
00145
00146
00147
00148
00149
00166 virtual const void *getFontTable(LETag tableTag) const = 0;
00167
00184 virtual le_bool canDisplay(LEUnicode32 ch) const;
00185
00194 virtual le_int32 getUnitsPerEM() const = 0;
00195
00219 virtual void mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, const LECharMapper *mapper, le_bool filterZeroWidth, LEGlyphStorage &glyphStorage) const;
00220
00236 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const;
00237
00252 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const;
00253
00266 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const = 0;
00267
00268
00269
00270
00271
00280 virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const = 0;
00281
00294 virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const = 0;
00295
00304 virtual float getXPixelsPerEm() const = 0;
00305
00314 virtual float getYPixelsPerEm() const = 0;
00315
00326 virtual float xUnitsToPoints(float xUnits) const;
00327
00338 virtual float yUnitsToPoints(float yUnits) const;
00339
00348 virtual void unitsToPoints(LEPoint &units, LEPoint &points) const;
00349
00360 virtual float xPixelsToUnits(float xPixels) const;
00361
00372 virtual float yPixelsToUnits(float yPixels) const;
00373
00382 virtual void pixelsToUnits(LEPoint &pixels, LEPoint &units) const;
00383
00395 virtual float getScaleFactorX() const = 0;
00396
00407 virtual float getScaleFactorY() const = 0;
00408
00424 virtual void transformFunits(float xFunits, float yFunits, LEPoint &pixels) const;
00425
00436 static inline float fixedToFloat(le_int32 fixed);
00437
00448 static inline le_int32 floatToFixed(float theFloat);
00449
00450
00451
00452
00453
00454
00455
00464 virtual le_int32 getAscent() const = 0;
00465
00474 virtual le_int32 getDescent() const = 0;
00475
00484 virtual le_int32 getLeading() const = 0;
00485
00496 virtual le_int32 getLineHeight() const;
00497
00503 virtual UClassID getDynamicClassID() const;
00504
00510 static UClassID getStaticClassID();
00511
00512 };
00513
00514 inline float LEFontInstance::fixedToFloat(le_int32 fixed)
00515 {
00516 return (float) (fixed / 65536.0);
00517 }
00518
00519 inline le_int32 LEFontInstance::floatToFixed(float theFloat)
00520 {
00521 return (le_int32) (theFloat * 65536.0);
00522 }
00523
00524 U_NAMESPACE_END
00525 #endif
00526
00527