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Diffstat (limited to 'Build/source/texk/web2c/xetexdir/XeTeXFontInst.h')
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1 files changed, 205 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/xetexdir/XeTeXFontInst.h b/Build/source/texk/web2c/xetexdir/XeTeXFontInst.h new file mode 100644 index 00000000000..d158186b66f --- /dev/null +++ b/Build/source/texk/web2c/xetexdir/XeTeXFontInst.h @@ -0,0 +1,205 @@ +/****************************************************************************\ + Part of the XeTeX typesetting system + copyright (c) 1994-2006 by SIL International + written by Jonathan Kew + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL SIL INTERNATIONAL BE LIABLE FOR +ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF +CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of SIL International +shall not be used in advertising or otherwise to promote the sale, +use or other dealings in this Software without prior written +authorization from SIL International. +\****************************************************************************/ + +/* + * file name: XeTeXFontInst.h + * + * created on: 2005-10-22 + * created by: Jonathan Kew + * + * originally based on PortableFontInstance.h from ICU + */ + + +#ifndef __XeTeXFontInst_H +#define __XeTeXFontInst_H + +#include <stdio.h> + +#include "LETypes.h" +#include "LEFontInstance.h" + +#include "FontTableCache.h" + +#include "sfnt.h" +#include "cmaps.h" + +#include "XeTeXFontMgr.h" +#include "XeTeX_ext.h" + +extern "C" { + void *xmalloc(unsigned); // from kpathsea +}; + +// Abstract superclass that XeTeXOTLayoutEngine uses; +// create specific subclasses for each supported platform + +class XeTeXFontInst : public LEFontInstance, protected FontTableCache +{ +protected: + PlatformFontRef fFontRef; + + float fPointSize; + + le_int32 fUnitsPerEM; + float fAscent; + float fDescent; + float fLeading; + + float fDeviceScaleX; + float fDeviceScaleY; + + float fXHeight; + float fItalicAngle; + + CMAPMapper *fCMAPMapper; + + const HMTXTable *fMetricsTable; + le_uint16 fNumLongMetrics; + le_uint16 fNumGlyphs; + bool fNumGlyphsInited; + + bool fVertical; // false = horizontal, true = vertical + + virtual const void *readTable(LETag tag, le_uint32 *length) const = 0; + void deleteTable(const void *table) const; + void getMetrics(); + + CMAPMapper *findUnicodeMapper(); + + const void *readFontTable(LETag tableTag) const; + const void *readFontTable(LETag tableTag, le_uint32& len) const; + +public: + XeTeXFontInst(PlatformFontRef fontRef, float pointSize, LEErrorCode &status); + + virtual ~XeTeXFontInst(); + + virtual PlatformFontRef getFontRef() const + { return fFontRef; } + + virtual void initialize(LEErrorCode &status); + + virtual const void *getFontTable(LETag tableTag) const; + + virtual void setLayoutDirVertical(bool vertical); + + virtual bool getLayoutDirVertical() const + { + return fVertical; + }; + + virtual le_int32 getUnitsPerEM() const + { + return fUnitsPerEM; + }; + + virtual le_int32 getAscent() const + { + return (le_int32)fAscent; + } + + virtual le_int32 getDescent() const + { + return (le_int32)fDescent; + } + + virtual le_int32 getLeading() const + { + return (le_int32)fLeading; + } + + virtual float getExactAscent() const + { + return fAscent; + } + + virtual float getExactDescent() const + { + return fDescent; + } + + virtual float getExactLeading() const + { + return fLeading; + } + + virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const + { + return fCMAPMapper->unicodeToGlyph(ch); + } + + virtual LEGlyphID mapGlyphToIndex(const char* glyphName) const; + + virtual le_uint16 getNumGlyphs() const; + + virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const; + + virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const; + + virtual void getGlyphBounds(LEGlyphID glyph, GlyphBBox *bbox) = 0; /* must be implemented by subclass */ + + float getGlyphWidth(LEGlyphID glyph); + void getGlyphHeightDepth(LEGlyphID glyph, float *ht, float* dp); + void getGlyphSidebearings(LEGlyphID glyph, float* lsb, float* rsb); + float getGlyphItalCorr(LEGlyphID glyph); + + float getXPixelsPerEm() const + { + return fPointSize; + }; + + float getYPixelsPerEm() const + { + return fPointSize; + }; + + float getScaleFactorX() const + { + return 1.0; + } + + float getScaleFactorY() const + { + return 1.0; + } + + float getXHeight() const + { + return fXHeight; + } + + float getItalicAngle() const + { + return fItalicAngle; + } +}; + +#endif |