LayoutEngine.h

Go to the documentation of this file.
00001 
00002 /*
00003  *
00004  * (C) Copyright IBM Corp. 1998-2007 - All Rights Reserved
00005  *
00006  */
00007 
00008 #ifndef __LAYOUTENGINE_H
00009 #define __LAYOUTENGINE_H
00010 
00011 #include "LETypes.h"
00012 
00018 U_NAMESPACE_BEGIN
00019 
00020 class LEFontInstance;
00021 class LEGlyphFilter;
00022 class LEGlyphStorage;
00023 
00067 class U_LAYOUT_API LayoutEngine : public UObject {
00068 protected:
00074     LEGlyphStorage *fGlyphStorage;
00075 
00083     const LEFontInstance *fFontInstance;
00084 
00092     le_int32 fScriptCode;
00093 
00101     le_int32 fLanguageCode;
00102 
00108     le_int32 fTypoFlags;
00109 
00116     le_bool fFilterZeroWidth;
00117 
00133     LayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags);
00134 
00142     LayoutEngine();
00143 
00166     virtual le_int32 characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
00167             LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success);
00168 
00195     virtual le_int32 computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success);
00196 
00210     virtual void positionGlyphs(LEGlyphStorage &glyphStorage, float x, float y, LEErrorCode &success);
00211 
00232     virtual void adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, LEGlyphStorage &glyphStorage, LEErrorCode &success);
00233 
00246     virtual const void *getFontTable(LETag tableTag) const;
00247 
00273     virtual void mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, le_bool mirror, LEGlyphStorage &glyphStorage, LEErrorCode &success);
00274 
00287     static void adjustMarkGlyphs(LEGlyphStorage &glyphStorage, LEGlyphFilter *markFilter, LEErrorCode &success);
00288 
00289 
00308     static void adjustMarkGlyphs(const LEUnicode chars[], le_int32 charCount, le_bool reverse, LEGlyphStorage &glyphStorage, LEGlyphFilter *markFilter, LEErrorCode &success);
00309 
00310 
00311 public:
00320     virtual ~LayoutEngine();
00321 
00347     virtual le_int32 layoutChars(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, float x, float y, LEErrorCode &success);
00348 
00358     le_int32 getGlyphCount() const;
00359 
00370     void getGlyphs(LEGlyphID glyphs[], LEErrorCode &success) const;
00371 
00384     virtual void getGlyphs(le_uint32 glyphs[], le_uint32 extraBits, LEErrorCode &success) const;
00385 
00396     void getCharIndices(le_int32 charIndices[], LEErrorCode &success) const;
00397 
00409     void getCharIndices(le_int32 charIndices[], le_int32 indexBase, LEErrorCode &success) const;
00410 
00422     void getGlyphPositions(float positions[], LEErrorCode &success) const;
00423 
00438     void getGlyphPosition(le_int32 glyphIndex, float &x, float &y, LEErrorCode &success) const;
00439 
00447     virtual void reset();
00448 
00465     static LayoutEngine *layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, LEErrorCode &success);
00466 
00471     static LayoutEngine *layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typo_flags, LEErrorCode &success);
00472 
00478     virtual UClassID getDynamicClassID() const;
00479 
00485     static UClassID getStaticClassID();
00486 
00487 };
00488 
00489 U_NAMESPACE_END
00490 #endif
00491 

Generated on Tue Oct 2 10:18:14 2007 for ICU 3.8 by  doxygen 1.5.2