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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
00238
00253 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const;
00254
00267 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const = 0;
00268
00269
00270
00271
00272
00281 virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const = 0;
00282
00295 virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const = 0;
00296
00305 virtual float getXPixelsPerEm() const = 0;
00306
00315 virtual float getYPixelsPerEm() const = 0;
00316
00327 virtual float xUnitsToPoints(float xUnits) const;
00328
00339 virtual float yUnitsToPoints(float yUnits) const;
00340
00349 virtual void unitsToPoints(LEPoint &units, LEPoint &points) const;
00350
00361 virtual float xPixelsToUnits(float xPixels) const;
00362
00373 virtual float yPixelsToUnits(float yPixels) const;
00374
00383 virtual void pixelsToUnits(LEPoint &pixels, LEPoint &units) const;
00384
00396 virtual float getScaleFactorX() const = 0;
00397
00408 virtual float getScaleFactorY() const = 0;
00409
00425 virtual void transformFunits(float xFunits, float yFunits, LEPoint &pixels) const;
00426
00437 static inline float fixedToFloat(le_int32 fixed);
00438
00449 static inline le_int32 floatToFixed(float theFloat);
00450
00451
00452
00453
00454
00455
00456
00465 virtual le_int32 getAscent() const = 0;
00466
00475 virtual le_int32 getDescent() const = 0;
00476
00485 virtual le_int32 getLeading() const = 0;
00486
00497 virtual le_int32 getLineHeight() const;
00498
00504 virtual UClassID getDynamicClassID() const;
00505
00511 static UClassID getStaticClassID();
00512
00513 };
00514
00515 inline float LEFontInstance::fixedToFloat(le_int32 fixed)
00516 {
00517 return (float) (fixed / 65536.0);
00518 }
00519
00520 inline le_int32 LEFontInstance::floatToFixed(float theFloat)
00521 {
00522 return (le_int32) (theFloat * 65536.0);
00523 }
00524
00525 U_NAMESPACE_END
00526 #endif
00527
00528