1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/graphite2/src/inc/GlyphFaceCache.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,103 @@
1.4 +/* GRAPHITE2 LICENSING
1.5 +
1.6 + Copyright 2010, SIL International
1.7 + All rights reserved.
1.8 +
1.9 + This library is free software; you can redistribute it and/or modify
1.10 + it under the terms of the GNU Lesser General Public License as published
1.11 + by the Free Software Foundation; either version 2.1 of License, or
1.12 + (at your option) any later version.
1.13 +
1.14 + This program is distributed in the hope that it will be useful,
1.15 + but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1.17 + Lesser General Public License for more details.
1.18 +
1.19 + You should also have received a copy of the GNU Lesser General Public
1.20 + License along with this library in the file named "LICENSE".
1.21 + If not, write to the Free Software Foundation, 51 Franklin Street,
1.22 + Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
1.23 + internet at http://www.fsf.org/licenses/lgpl.html.
1.24 +
1.25 +Alternatively, the contents of this file may be used under the terms of the
1.26 +Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
1.27 +License, as published by the Free Software Foundation, either version 2
1.28 +of the License or (at your option) any later version.
1.29 +*/
1.30 +#pragma once
1.31 +
1.32 +#include "inc/GlyphFace.h"
1.33 +#include "graphite2/Font.h"
1.34 +
1.35 +namespace graphite2 {
1.36 +
1.37 +class Segment;
1.38 +class Face;
1.39 +class FeatureVal;
1.40 +
1.41 +
1.42 +class GlyphFaceCacheHeader
1.43 +{
1.44 +public:
1.45 + bool initialize(const Face & face, const bool dumb_font); //return result indicates success. Do not use if failed.
1.46 + unsigned short numGlyphs() const { return m_nGlyphs; }
1.47 + unsigned short numAttrs() const { return m_numAttrs; }
1.48 +
1.49 +private:
1.50 +friend class Face;
1.51 +friend class GlyphFace;
1.52 + const byte* m_pHead,
1.53 + * m_pHHea,
1.54 + * m_pHmtx,
1.55 + * m_pGlat,
1.56 + * m_pGloc,
1.57 + * m_pGlyf,
1.58 + * m_pLoca;
1.59 + size_t m_lHmtx,
1.60 + m_lGlat,
1.61 + m_lGlyf,
1.62 + m_lLoca;
1.63 +
1.64 + uint32 m_fGlat;
1.65 + unsigned short m_numAttrs, // number of glyph attributes per glyph
1.66 + m_nGlyphsWithGraphics, //i.e. boundary box and advance
1.67 + m_nGlyphsWithAttributes,
1.68 + m_nGlyphs; // number of glyphs in the font. Max of the above 2.
1.69 + bool m_locFlagsUse32Bit;
1.70 +};
1.71 +
1.72 +class GlyphFaceCache : public GlyphFaceCacheHeader
1.73 +{
1.74 +public:
1.75 + static GlyphFaceCache* makeCache(const GlyphFaceCacheHeader& hdr /*, EGlyphCacheStrategy requested */);
1.76 +
1.77 + GlyphFaceCache(const GlyphFaceCacheHeader& hdr);
1.78 + ~GlyphFaceCache();
1.79 +
1.80 + const GlyphFace *glyphSafe(unsigned short glyphid) const { return glyphid<numGlyphs()?glyph(glyphid):NULL; }
1.81 + uint16 glyphAttr(uint16 gid, uint8 gattr) const { if (gattr>=numAttrs()) return 0; const GlyphFace*p=glyphSafe(gid); return p?p->getAttr(gattr):0; }
1.82 +
1.83 + void * operator new (size_t s, const GlyphFaceCacheHeader& hdr)
1.84 + {
1.85 + return malloc(s + sizeof(GlyphFace*)*hdr.numGlyphs());
1.86 + }
1.87 + // delete in case an exception is thrown in constructor
1.88 + void operator delete(void* p, const GlyphFaceCacheHeader& ) throw()
1.89 + {
1.90 + free(p);
1.91 + }
1.92 +
1.93 + const GlyphFace *glyph(unsigned short glyphid) const; //result may be changed by subsequent call with a different glyphid
1.94 + void loadAllGlyphs();
1.95 +
1.96 + CLASS_NEW_DELETE
1.97 +
1.98 +private:
1.99 + GlyphFace **glyphPtrDirect(unsigned short glyphid) const { return (GlyphFace **)((const char*)(this)+sizeof(GlyphFaceCache)+sizeof(GlyphFace*)*glyphid);}
1.100 +
1.101 +private: //defensive
1.102 + GlyphFaceCache(const GlyphFaceCache&);
1.103 + GlyphFaceCache& operator=(const GlyphFaceCache&);
1.104 +};
1.105 +
1.106 +} // namespace graphite2
