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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
00185 virtual const void* getFontTable(LETag tableTag, size_t &length) const { length=-1; return getFontTable(tableTag); }
00186
00203 virtual le_bool canDisplay(LEUnicode32 ch) const;
00204
00213 virtual le_int32 getUnitsPerEM() const = 0;
00214
00238 virtual void mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, const LECharMapper *mapper, le_bool filterZeroWidth, LEGlyphStorage &glyphStorage) const;
00239
00255 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const;
00256
00271 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const;
00272
00285 virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const = 0;
00286
00287
00288
00289
00290
00299 virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const = 0;
00300
00313 virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const = 0;
00314
00323 virtual float getXPixelsPerEm() const = 0;
00324
00333 virtual float getYPixelsPerEm() const = 0;
00334
00345 virtual float xUnitsToPoints(float xUnits) const;
00346
00357 virtual float yUnitsToPoints(float yUnits) const;
00358
00367 virtual void unitsToPoints(LEPoint &units, LEPoint &points) const;
00368
00379 virtual float xPixelsToUnits(float xPixels) const;
00380
00391 virtual float yPixelsToUnits(float yPixels) const;
00392
00401 virtual void pixelsToUnits(LEPoint &pixels, LEPoint &units) const;
00402
00414 virtual float getScaleFactorX() const = 0;
00415
00426 virtual float getScaleFactorY() const = 0;
00427
00443 virtual void transformFunits(float xFunits, float yFunits, LEPoint &pixels) const;
00444
00455 static inline float fixedToFloat(le_int32 fixed);
00456
00467 static inline le_int32 floatToFixed(float theFloat);
00468
00469
00470
00471
00472
00473
00474
00483 virtual le_int32 getAscent() const = 0;
00484
00493 virtual le_int32 getDescent() const = 0;
00494
00503 virtual le_int32 getLeading() const = 0;
00504
00515 virtual le_int32 getLineHeight() const;
00516
00522 virtual UClassID getDynamicClassID() const;
00523
00529 static UClassID getStaticClassID();
00530
00531 };
00532
00533 inline float LEFontInstance::fixedToFloat(le_int32 fixed)
00534 {
00535 return (float) (fixed / 65536.0);
00536 }
00537
00538 inline le_int32 LEFontInstance::floatToFixed(float theFloat)
00539 {
00540 return (le_int32) (theFloat * 65536.0);
00541 }
00542
00543 U_NAMESPACE_END
00544 #endif
00545
00546