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+/****************************************************************************\
+ 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