1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/graphite2/src/GlyphFaceCache.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,149 @@
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 +#include "inc/GlyphFaceCache.h"
1.31 +#include "graphite2/Font.h"
1.32 +#include "inc/Face.h" //for the tags
1.33 +#include "inc/Endian.h"
1.34 +
1.35 +using namespace graphite2;
1.36 +
1.37 +/*virtual*/ bool GlyphFaceCacheHeader::initialize(const Face & face, const bool dumb_font) //return result indicates success. Do not use if failed.
1.38 +{
1.39 + if ((m_pLoca = face.getTable(Tag::loca, &m_lLoca)) == NULL) return false;
1.40 + if ((m_pHead = face.getTable(Tag::head)) == NULL) return false;
1.41 + if ((m_pGlyf = face.getTable(Tag::glyf, &m_lGlyf)) == NULL) return false;
1.42 + if ((m_pHmtx = face.getTable(Tag::hmtx, &m_lHmtx)) == NULL) return false;
1.43 + if ((m_pHHea = face.getTable(Tag::hhea)) == NULL) return false;
1.44 +
1.45 + const void* pMaxp = face.getTable(Tag::maxp);
1.46 + if (pMaxp == NULL) return false;
1.47 + m_nGlyphs = m_nGlyphsWithGraphics = (unsigned short)TtfUtil::GlyphCount(pMaxp);
1.48 + if (TtfUtil::LocaLookup(m_nGlyphs-1, m_pLoca, m_lLoca, m_pHead) == size_t(-1))
1.49 + return false; // This will fail if m_nGlyphs is wildly out of range.
1.50 +
1.51 + if (!dumb_font)
1.52 + {
1.53 + if ((m_pGlat = face.getTable(Tag::Glat, &m_lGlat)) == NULL) return false;
1.54 + m_fGlat = be::peek<uint32>(m_pGlat);
1.55 + size_t lGloc;
1.56 + if ((m_pGloc = face.getTable(Tag::Gloc, &lGloc)) == NULL) return false;
1.57 + if (lGloc < 6) return false;
1.58 + int version = be::read<uint32>(m_pGloc);
1.59 + if (version != 0x00010000) return false;
1.60 +
1.61 + const uint16 locFlags = be::read<uint16>(m_pGloc);
1.62 + m_numAttrs = be::read<uint16>(m_pGloc);
1.63 + if (m_numAttrs > 0x1000) return false; // is this hard limit appropriate?
1.64 +
1.65 + if (locFlags & 1)
1.66 + {
1.67 + m_locFlagsUse32Bit = true;
1.68 + m_nGlyphsWithAttributes = (unsigned short)((lGloc - 12) / 4);
1.69 + }
1.70 + else
1.71 + {
1.72 + m_locFlagsUse32Bit = false;
1.73 + m_nGlyphsWithAttributes = (unsigned short)((lGloc - 10) / 2);
1.74 + }
1.75 +
1.76 + if (m_nGlyphsWithAttributes > m_nGlyphs)
1.77 + m_nGlyphs = m_nGlyphsWithAttributes;
1.78 + }
1.79 +
1.80 + return true;
1.81 +}
1.82 +
1.83 +GlyphFaceCache* GlyphFaceCache::makeCache(const GlyphFaceCacheHeader& hdr)
1.84 +{
1.85 + return new (hdr) GlyphFaceCache(hdr);
1.86 +}
1.87 +
1.88 +GlyphFaceCache::GlyphFaceCache(const GlyphFaceCacheHeader& hdr)
1.89 +: GlyphFaceCacheHeader(hdr)
1.90 +{
1.91 + unsigned int nGlyphs = numGlyphs();
1.92 +
1.93 + for (unsigned int i = 0; i < nGlyphs; i++)
1.94 + {
1.95 + *glyphPtrDirect(i) = NULL;
1.96 + }
1.97 +}
1.98 +
1.99 +GlyphFaceCache::~GlyphFaceCache()
1.100 +{
1.101 + unsigned int nGlyphs = numGlyphs();
1.102 + int deltaPointers = (*glyphPtrDirect(nGlyphs-1u) - *glyphPtrDirect(0u));
1.103 + if ((nGlyphs > 0u) && (deltaPointers == static_cast<int>(nGlyphs - 1)))
1.104 + {
1.105 + for (unsigned int i=0 ; i<nGlyphs; ++i)
1.106 + {
1.107 + GlyphFace *p = *glyphPtrDirect(i);
1.108 + assert (p);
1.109 + p->~GlyphFace();
1.110 + }
1.111 + free (*glyphPtrDirect(0));
1.112 + }
1.113 + else
1.114 + {
1.115 + for (unsigned int i=0 ; i<nGlyphs; ++i)
1.116 + {
1.117 + GlyphFace *p = *glyphPtrDirect(i);
1.118 + if (p)
1.119 + {
1.120 + p->~GlyphFace();
1.121 + free(p);
1.122 + }
1.123 + }
1.124 + }
1.125 +}
1.126 +
1.127 +void GlyphFaceCache::loadAllGlyphs()
1.128 +{
1.129 + unsigned int nGlyphs = numGlyphs();
1.130 +// size_t sparse_size = 0;
1.131 + GlyphFace * glyphs = gralloc<GlyphFace>(nGlyphs);
1.132 + for (unsigned short glyphid = 0; glyphid < nGlyphs; glyphid++)
1.133 + {
1.134 + GlyphFace **p = glyphPtrDirect(glyphid);
1.135 + *p = &(glyphs[glyphid]);
1.136 + new(*p) GlyphFace(*this, glyphid);
1.137 +// sparse_size += (*p)->m_attrs._sizeof();
1.138 + }
1.139 +// const size_t flat_size = nGlyphs*(sizeof(uint16*) + sizeof(uint16)*numAttrs());
1.140 +// assert(sparse_size <= flat_size);
1.141 +}
1.142 +
1.143 +/*virtual*/ const GlyphFace *GlyphFaceCache::glyph(unsigned short glyphid) const //result may be changed by subsequent call with a different glyphid
1.144 +{
1.145 + GlyphFace **p = glyphPtrDirect(glyphid);
1.146 + if (*p)
1.147 + return *p;
1.148 +
1.149 + *p = (GlyphFace*)malloc(sizeof(GlyphFace));
1.150 + new(*p) GlyphFace(*this, glyphid);
1.151 + return *p;
1.152 +}
