vcl/generic/glyphs/graphite_serverfont.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 // Header files
  21 //
  22
  23 // Platform
  24 #include <i18nlangtag/languagetag.hxx>
  25 #include <sallayout.hxx>
  26 // Module
  27 #include "gcach_ftyp.hxx"
  28 #include "generic/glyphcache.hxx"
  29 #include <graphite_features.hxx>
  30 #include <graphite_serverfont.hxx>
  31
  32 float freetypeServerFontAdvance(const void* appFontHandle, gr_uint16 glyphId)
  33 {
  34     ServerFont * pServerFont =
  35         const_cast<ServerFont*>
  36         (reinterpret_cast<const ServerFont*>(appFontHandle));
  37     if (pServerFont)
  38     {
  39         return static_cast<float>(pServerFont->GetGlyphMetric(glyphId).GetCharWidth());
  40     }
  41     return .0f;
  42 }
  43
  44 //
  45 // An implementation of the GraphiteLayout interface to enable Graphite enabled fonts to be used.
  46 //
  47
  48 GraphiteServerFontLayout::GraphiteServerFontLayout(ServerFont& rServerFont) throw()
  49   : ServerFontLayout(rServerFont),
  50     maImpl(rServerFont.GetGraphiteFace()->face(),
  51         rServerFont),
  52     mpFeatures(NULL)
  53 {
  54     gr_font * pFont = rServerFont.GetGraphiteFace()->font(rServerFont.GetFontSelData().mnHeight);
  55     if (!pFont)
  56     {
  57         pFont = gr_make_font_with_advance_fn(
  58                // need to use mnHeight here, mfExactHeight can give wrong values
  59                static_cast<float>(rServerFont.GetFontSelData().mnHeight),
  60                &rServerFont,
  61                freetypeServerFontAdvance,
  62                rServerFont.GetGraphiteFace()->face());
  63         rServerFont.GetGraphiteFace()->addFont(rServerFont.GetFontSelData().mnHeight, pFont);
  64     }
  65     maImpl.SetFont(pFont);
  66     OString aLang("");
  67     if (rServerFont.GetFontSelData().meLanguage != LANGUAGE_DONTKNOW)
  68     {
  69         aLang = OUStringToOString( LanguageTag( rServerFont.GetFontSelData().meLanguage ).getBcp47(),
  70                 RTL_TEXTENCODING_UTF8 );
  71     }
  72     OString name = OUStringToOString(
  73         rServerFont.GetFontSelData().maTargetName, RTL_TEXTENCODING_UTF8 );
  74 #ifdef DEBUG
  75     printf("GraphiteServerFontLayout %lx %s size %d %f\n", (long unsigned int)this, name.getStr(),
  76         rServerFont.GetMetricsFT().x_ppem,
  77         rServerFont.GetFontSelData().mfExactHeight);
  78 #endif
  79     sal_Int32 nFeat = name.indexOf(grutils::GrFeatureParser::FEAT_PREFIX) + 1;
  80     if (nFeat > 0)
  81     {
  82         OString aFeat = name.copy(nFeat, name.getLength() - nFeat);
  83         mpFeatures = new grutils::GrFeatureParser(
  84             rServerFont.GetGraphiteFace()->face(), aFeat, aLang);
  85 #ifdef DEBUG
  86         if (mpFeatures)
  87             printf("GraphiteServerFontLayout %s/%s/%s %x language %d features %d errors\n",
  88                 OUStringToOString( rServerFont.GetFontSelData().GetFamilyName(),
  89                 RTL_TEXTENCODING_UTF8 ).getStr(),
  90                 OUStringToOString( rServerFont.GetFontSelData().maTargetName,
  91                 RTL_TEXTENCODING_UTF8 ).getStr(),
  92                 OUStringToOString( rServerFont.GetFontSelData().maSearchName,
  93                 RTL_TEXTENCODING_UTF8 ).getStr(),
  94                 rServerFont.GetFontSelData().meLanguage,
  95                 (int)mpFeatures->numFeatures(), mpFeatures->parseErrors());
  96 #endif
  97     }
  98     else
  99     {
 100         mpFeatures = new grutils::GrFeatureParser(
 101             rServerFont.GetGraphiteFace()->face(), aLang);
 102     }
 103     maImpl.SetFeatures(mpFeatures);
 104 }
 105
 106 GraphiteServerFontLayout::~GraphiteServerFontLayout() throw()
 107 {
 108     delete mpFeatures;
 109     mpFeatures = NULL;
 110 }
 111
 112 bool GraphiteServerFontLayout::IsGraphiteEnabledFont(ServerFont& rServerFont)
 113 {
 114     if (rServerFont.GetGraphiteFace())
 115     {
 116 #ifdef DEBUG
 117         printf("IsGraphiteEnabledFont\n");
 118 #endif
 119         return true;
 120     }
 121     return false;
 122 }
 123
 124 sal_GlyphId GraphiteLayoutImpl::getKashidaGlyph(int & width)
 125 {
 126     int nKashidaIndex = mrServerFont.GetGlyphIndex( 0x0640 );
 127     if( nKashidaIndex != 0 )
 128     {
 129         const GlyphMetric& rGM = mrServerFont.GetGlyphMetric( nKashidaIndex );
 130         width = rGM.GetCharWidth();
 131     }
 132     else
 133     {
 134         width = 0;
 135     }
 136     return nKashidaIndex;
 137 }
 138
 139 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */