1 files changed, 103 insertions, 0 deletions
diff --git a/gfx/graphite2/src/inc/GlyphFaceCache.h b/gfx/graphite2/src/inc/GlyphFaceCache.h
new file mode 100644
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+++ b/gfx/graphite2/src/inc/GlyphFaceCache.h
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+/*  GRAPHITE2 LICENSING
+
+    Copyright 2010, SIL International
+    All rights reserved.
+
+    This library is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published
+    by the Free Software Foundation; either version 2.1 of License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should also have received a copy of the GNU Lesser General Public
+    License along with this library in the file named "LICENSE".
+    If not, write to the Free Software Foundation, 51 Franklin Street, 
+    Suite 500, Boston, MA 02110-1335, USA or visit their web page on the 
+    internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+#pragma once
+
+#include "inc/GlyphFace.h"
+#include "graphite2/Font.h"
+
+namespace graphite2 {
+
+class Segment;
+class Face;
+class FeatureVal;
+
+
+class GlyphFaceCacheHeader
+{
+public:
+    bool initialize(const Face & face, const bool dumb_font);    //return result indicates success. Do not use if failed.
+    unsigned short numGlyphs() const { return m_nGlyphs; }
+    unsigned short numAttrs() const { return m_numAttrs; }
+
+private:
+friend class Face;
+friend class GlyphFace;
+    const byte* m_pHead,
+    		  * m_pHHea,
+    		  * m_pHmtx,
+    		  * m_pGlat,
+    		  * m_pGloc,
+    		  * m_pGlyf,
+    		  * m_pLoca;
+    size_t		m_lHmtx,
+    			m_lGlat,
+    			m_lGlyf,
+    			m_lLoca;
+
+    uint32			m_fGlat;
+    unsigned short 	m_numAttrs,					// number of glyph attributes per glyph
+    				m_nGlyphsWithGraphics,		//i.e. boundary box and advance
+    				m_nGlyphsWithAttributes,
+    				m_nGlyphs;					// number of glyphs in the font. Max of the above 2.
+    bool 			m_locFlagsUse32Bit;
+};
+
+class GlyphFaceCache : public GlyphFaceCacheHeader
+{
+public:
+    static GlyphFaceCache* makeCache(const GlyphFaceCacheHeader& hdr /*, EGlyphCacheStrategy requested */);
+
+    GlyphFaceCache(const GlyphFaceCacheHeader& hdr);
+    ~GlyphFaceCache();
+
+    const GlyphFace *glyphSafe(unsigned short glyphid) const { return glyphid<numGlyphs()?glyph(glyphid):NULL; }
+    uint16 glyphAttr(uint16 gid, uint8 gattr) const { if (gattr>=numAttrs()) return 0; const GlyphFace*p=glyphSafe(gid); return p?p->getAttr(gattr):0; }
+
+    void * operator new (size_t s, const GlyphFaceCacheHeader& hdr)
+    {
+        return malloc(s + sizeof(GlyphFace*)*hdr.numGlyphs());
+    }
+    // delete in case an exception is thrown in constructor
+    void operator delete(void* p, const GlyphFaceCacheHeader& ) throw()
+    {
+        free(p);
+    }
+
+    const GlyphFace *glyph(unsigned short glyphid) const;      //result may be changed by subsequent call with a different glyphid
+    void loadAllGlyphs();
+
+    CLASS_NEW_DELETE
+    
+private:
+    GlyphFace **glyphPtrDirect(unsigned short glyphid) const { return (GlyphFace **)((const char*)(this)+sizeof(GlyphFaceCache)+sizeof(GlyphFace*)*glyphid);}
+
+private:      //defensive
+    GlyphFaceCache(const GlyphFaceCache&);
+    GlyphFaceCache& operator=(const GlyphFaceCache&);
+};
+
+} // namespace graphite2