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 // Platform
  23 #include <i18nlangtag/languagetag.hxx>
  24 #include <sallayout.hxx>
  25 // Module
  26 #include "gcach_ftyp.hxx"
  27 #include "generic/glyphcache.hxx"
  28 #include <graphite_features.hxx>
  29 #include <graphite_serverfont.hxx>
  30
  31 float freetypeServerFontAdvance(const void* appFontHandle, gr_uint16 glyphId)
  32 {
  33     ServerFont * pServerFont =
  34         const_cast<ServerFont*>
  35         (static_cast<const ServerFont*>(appFontHandle));
  36     if (pServerFont)
  37     {
  38         return static_cast<float>(pServerFont->GetGlyphMetric(glyphId).GetCharWidth());
  39     }
  40     return .0f;
  41 }
  42
  43 // An implementation of the GraphiteLayout interface to enable Graphite enabled fonts to be used.
  44
  45 GraphiteServerFontLayout::GraphiteServerFontLayout(ServerFont& rServerFont) throw()
  46     : ServerFontLayout(rServerFont),
  47         maImpl(rServerFont.GetGraphiteFace()->face(), rServerFont)
  48     , mpFeatures(NULL)
  49     , mpStr(NULL)
  50 {
  51     gr_font * pFont = rServerFont.GetGraphiteFace()->font(rServerFont.GetFontSelData().mnHeight, rServerFont.NeedsArtificialBold(), rServerFont.NeedsArtificialItalic());
  52     if (!pFont)
  53     {
  54         pFont = gr_make_font_with_advance_fn(
  55                // need to use mnHeight here, mfExactHeight can give wrong values
  56                static_cast<float>(rServerFont.GetFontSelData().mnHeight),
  57                &rServerFont,
  58                freetypeServerFontAdvance,
  59                rServerFont.GetGraphiteFace()->face());
  60         rServerFont.GetGraphiteFace()->addFont(rServerFont.GetFontSelData().mnHeight, pFont, rServerFont.NeedsArtificialBold(), rServerFont.NeedsArtificialItalic());
  61     }
  62     maImpl.SetFont(pFont);
  63     OString aLang("");
  64     if (rServerFont.GetFontSelData().meLanguage != LANGUAGE_DONTKNOW)
  65     {
  66         aLang = OUStringToOString( LanguageTag( rServerFont.GetFontSelData().meLanguage ).getBcp47(),
  67                 RTL_TEXTENCODING_UTF8 );
  68     }
  69     OString name = OUStringToOString(
  70         rServerFont.GetFontSelData().maTargetName, RTL_TEXTENCODING_UTF8 );
  71 #ifdef DEBUG
  72     printf("GraphiteServerFontLayout %lx %s size %d %f\n", (long unsigned int)this, name.getStr(),
  73         rServerFont.GetMetricsFT().x_ppem,
  74         rServerFont.GetFontSelData().mfExactHeight);
  75 #endif
  76     sal_Int32 nFeat = name.indexOf(grutils::GrFeatureParser::FEAT_PREFIX) + 1;
  77     if (nFeat > 0)
  78     {
  79         OString aFeat = name.copy(nFeat, name.getLength() - nFeat);
  80         mpFeatures = new grutils::GrFeatureParser(
  81             rServerFont.GetGraphiteFace()->face(), aFeat, aLang);
  82 #ifdef DEBUG
  83         if (mpFeatures)
  84             printf("GraphiteServerFontLayout %s/%s/%s %x language %d features %d errors\n",
  85                 OUStringToOString( rServerFont.GetFontSelData().GetFamilyName(),
  86                 RTL_TEXTENCODING_UTF8 ).getStr(),
  87                 OUStringToOString( rServerFont.GetFontSelData().maTargetName,
  88                 RTL_TEXTENCODING_UTF8 ).getStr(),
  89                 OUStringToOString( rServerFont.GetFontSelData().maSearchName,
  90                 RTL_TEXTENCODING_UTF8 ).getStr(),
  91                 rServerFont.GetFontSelData().meLanguage,
  92                 (int)mpFeatures->numFeatures(), mpFeatures->parseErrors());
  93 #endif
  94     }
  95     else
  96     {
  97         mpFeatures = new grutils::GrFeatureParser(
  98             rServerFont.GetGraphiteFace()->face(), aLang);
  99     }
 100     maImpl.SetFeatures(mpFeatures);
 101 }
 102
 103 GraphiteServerFontLayout::~GraphiteServerFontLayout() throw()
 104 {
 105     delete mpFeatures;
 106     mpFeatures = NULL;
 107 }
 108
 109 bool GraphiteServerFontLayout::IsGraphiteEnabledFont(ServerFont& rServerFont)
 110 {
 111     if (rServerFont.GetGraphiteFace())
 112     {
 113 #ifdef DEBUG
 114         printf("IsGraphiteEnabledFont\n");
 115 #endif
 116         return true;
 117     }
 118     return false;
 119 }
 120
 121 sal_GlyphId GraphiteLayoutImpl::getKashidaGlyph(int & width)
 122 {
 123     int nKashidaIndex = mrServerFont.GetGlyphIndex( 0x0640 );
 124     if( nKashidaIndex != 0 )
 125     {
 126         const GlyphMetric& rGM = mrServerFont.GetGlyphMetric( nKashidaIndex );
 127         width = rGM.GetCharWidth();
 128     }
 129     else
 130     {
 131         width = 0;
 132     }
 133     return nKashidaIndex;
 134 }
 135
 136 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */