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      1 /*
      2  * This file is part of the internal font implementation.  It should not be included by anyone other than
      3  * FontMac.cpp, FontWin.cpp and Font.cpp.
      4  *
      5  * Copyright (C) 2006 Apple Computer, Inc.
      6  * Copyright (C) 2006 Michael Emmel mike.emmel (at) gmail.com
      7  * Copyright (C) 2007 Holger Hans Peter Freyther
      8  * Copyright (C) 2007 Pioneer Research Center USA, Inc.
      9  * All rights reserved.
     10  *
     11  * This library is free software; you can redistribute it and/or
     12  * modify it under the terms of the GNU Library General Public
     13  * License as published by the Free Software Foundation; either
     14  * version 2 of the License, or (at your option) any later version.
     15  *
     16  * This library is distributed in the hope that it will be useful,
     17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     19  * Library General Public License for more details.
     20  *
     21  * You should have received a copy of the GNU Library General Public License
     22  * along with this library; see the file COPYING.LIB.  If not, write to
     23  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     24  * Boston, MA 02110-1301, USA.
     25  *
     26  */
     27 
     28 #ifndef FontPlatformData_h
     29 #define FontPlatformData_h
     30 
     31 #include "GlyphBuffer.h"
     32 #include "FontDescription.h"
     33 #include <cairo.h>
     34 #if defined(USE_FREETYPE)
     35 #include <cairo-ft.h>
     36 #include <fontconfig/fcfreetype.h>
     37 #elif defined(USE_PANGO)
     38 #include <pango/pangocairo.h>
     39 #else
     40 #error "Must defined a font backend"
     41 #endif
     42 
     43 namespace WebCore {
     44 
     45 class String;
     46 
     47 class FontPlatformData {
     48 public:
     49     FontPlatformData(WTF::HashTableDeletedValueType)
     50 #if defined(USE_FREETYPE)
     51         : m_pattern(hashTableDeletedFontValue())
     52         , m_fallbacks(0)
     53 #elif defined(USE_PANGO)
     54         : m_context(0)
     55         , m_font(hashTableDeletedFontValue())
     56 #else
     57 #error "Must defined a font backend"
     58 #endif
     59         , m_scaledFont(0)
     60         { }
     61 
     62     FontPlatformData()
     63 #if defined(USE_FREETYPE)
     64         : m_pattern(0)
     65         , m_fallbacks(0)
     66 #elif defined(USE_PANGO)
     67         : m_context(0)
     68         , m_font(0)
     69 #else
     70 #error "Must defined a font backend"
     71 #endif
     72         , m_scaledFont(0)
     73         { }
     74 
     75     FontPlatformData(const FontDescription&, const AtomicString& family);
     76 
     77     FontPlatformData(float size, bool bold, bool italic);
     78     FontPlatformData(cairo_font_face_t* fontFace, int size, bool bold, bool italic);
     79     FontPlatformData(const FontPlatformData&);
     80 
     81     ~FontPlatformData();
     82 
     83     static bool init();
     84 
     85     bool isFixedPitch();
     86     float size() const { return m_size; }
     87     bool syntheticBold() const { return m_syntheticBold; }
     88     bool syntheticOblique() const { return m_syntheticOblique; }
     89 
     90     cairo_scaled_font_t* scaledFont() const { return m_scaledFont; }
     91 
     92     unsigned hash() const
     93     {
     94 #if defined(USE_FREETYPE)
     95         if (m_pattern)
     96             return FcPatternHash(m_pattern);
     97 #endif
     98         uintptr_t hashCodes[1] = { reinterpret_cast<uintptr_t>(m_scaledFont) };
     99         return StringImpl::computeHash(reinterpret_cast<UChar*>(hashCodes), sizeof(hashCodes) / sizeof(UChar));
    100     }
    101 
    102     bool operator==(const FontPlatformData&) const;
    103     FontPlatformData& operator=(const FontPlatformData&);
    104     bool isHashTableDeletedValue() const {
    105 #if defined(USE_FREETYPE)
    106         return m_pattern == hashTableDeletedFontValue();
    107 #elif defined(USE_PANGO)
    108         return m_font == hashTableDeletedFontValue();
    109 #endif
    110     };
    111 
    112 #ifndef NDEBUG
    113     String description() const;
    114 #endif
    115 
    116 #if defined(USE_FREETYPE)
    117     FcPattern* m_pattern;
    118     FcFontSet* m_fallbacks;
    119 #elif defined(USE_PANGO)
    120     static PangoFontMap* m_fontMap;
    121     static GHashTable* m_hashTable;
    122 
    123     PangoContext* m_context;
    124     PangoFont* m_font;
    125 #else
    126 #error "Must defined a font backend"
    127 #endif
    128     float m_size;
    129     bool m_syntheticBold;
    130     bool m_syntheticOblique;
    131     cairo_scaled_font_t* m_scaledFont;
    132 private:
    133 #if defined(USE_FREETYPE)
    134     static FcPattern *hashTableDeletedFontValue() { return reinterpret_cast<FcPattern*>(-1); }
    135 #elif defined(USE_PANGO)
    136     static PangoFont *hashTableDeletedFontValue() { return reinterpret_cast<PangoFont*>(-1); }
    137 #endif
    138 };
    139 
    140 }
    141 
    142 #endif
    143