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      1 /*
      2  * Copyright (C) 2008 Alp Toker <alp (at) atoker.com>
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #include "config.h"
     22 #include "FontCache.h"
     23 
     24 #include "Font.h"
     25 #include "SimpleFontData.h"
     26 #include <wtf/Assertions.h>
     27 
     28 namespace WebCore {
     29 
     30 void FontCache::platformInit()
     31 {
     32     if (!FontPlatformData::init())
     33         ASSERT_NOT_REACHED();
     34 }
     35 
     36 const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
     37 {
     38 #if defined(USE_FREETYPE)
     39     FcResult fresult;
     40     FontPlatformData* prim = const_cast<FontPlatformData*>(&font.primaryFont()->platformData());
     41 
     42     if (!prim->m_fallbacks)
     43         prim->m_fallbacks = FcFontSort(NULL, prim->m_pattern, FcTrue, NULL, &fresult);
     44 
     45     FcFontSet* fs = prim->m_fallbacks;
     46 
     47     for (int i = 0; i < fs->nfont; i++) {
     48         FcPattern* fin = FcFontRenderPrepare(NULL, prim->m_pattern, fs->fonts[i]);
     49         cairo_font_face_t* fontFace = cairo_ft_font_face_create_for_pattern(fin);
     50         FontPlatformData alternateFont(fontFace, font.fontDescription().computedPixelSize(), false, false);
     51         cairo_font_face_destroy(fontFace);
     52         alternateFont.m_pattern = fin;
     53         SimpleFontData* sfd = getCachedFontData(&alternateFont);
     54         if (sfd->containsCharacters(characters, length))
     55             return sfd;
     56     }
     57 #endif
     58 
     59     return 0;
     60 }
     61 
     62 SimpleFontData* FontCache::getSimilarFontPlatformData(const Font& font)
     63 {
     64     return 0;
     65 }
     66 
     67 SimpleFontData* FontCache::getLastResortFallbackFont(const FontDescription& fontDescription)
     68 {
     69     // FIXME: Would be even better to somehow get the user's default font here.
     70     // For now we'll pick the default that the user would get without changing any prefs.
     71     static AtomicString timesStr("Times New Roman");
     72     return getCachedFontData(fontDescription, timesStr);
     73 }
     74 
     75 void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
     76 {
     77 }
     78 
     79 FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
     80 {
     81     return new FontPlatformData(fontDescription, family);
     82 }
     83 
     84 }
     85