WebCore/FontPlatformData.h

   1 /*
   2  * This file is part of the internal font implementation.
   3  * It should not be included by source files outside it.
   4  *
   5  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public License
  18  * along with this library; see the file COPYING.LIB.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02110-1301, USA.
  21  *
  22  */
  23
  24 #ifndef FontPlatformData_h
  25 #define FontPlatformData_h
  26
  27 #include "StringImpl.h"
  28
  29 #ifdef __OBJC__
  30 @class NSFont;
  31 #else
  32 class NSFont;
  33 #endif
  34
  35 #import <GraphicsServices/GSFont.h>
  36
  37 typedef struct CGFont* CGFontRef;
  38 typedef UInt32 ATSUFontID;
  39 #ifndef BUILDING_ON_TIGER
  40 typedef const struct __CTFont* CTFontRef;
  41 #endif
  42
  43 #include <CoreFoundation/CFBase.h>
  44 #include <objc/objc-auto.h>
  45 #include <wtf/RetainPtr.h>
  46
  47 namespace WebCore {
  48
  49
  50 struct FontPlatformData {
  51     FontPlatformData(float size, bool syntheticBold, bool syntheticOblique)
  52         : m_syntheticBold(syntheticBold)
  53         , m_syntheticOblique(syntheticOblique)
  54         , m_gsFont(0)
  55         , m_isImageFont(false)
  56         , m_size(size)
  57         , m_font(0)
  58     {
  59     }
  60
  61     FontPlatformData(GSFontRef = 0, bool syntheticBold = false, bool syntheticOblique = false);
  62
  63     FontPlatformData(GSFontRef f, float s, bool b , bool o)
  64         : m_syntheticBold(b), m_syntheticOblique(o), m_gsFont(f), m_isImageFont(false), m_size(s), m_font(0)
  65     {
  66     }
  67
  68     FontPlatformData(const FontPlatformData&);
  69
  70     ~FontPlatformData();
  71
  72     FontPlatformData(WTF::HashTableDeletedValueType) : m_font(hashTableDeletedFontValue()) { }
  73     bool isHashTableDeletedValue() const { return m_font == hashTableDeletedFontValue(); }
  74
  75     float size() const { return m_size; }
  76
  77     bool m_syntheticBold;
  78     bool m_syntheticOblique;
  79
  80     GSFontRef m_gsFont;
  81     bool m_isImageFont;
  82     float m_size;
  83
  84     unsigned hash() const
  85     {
  86         ASSERT(m_font != 0 || m_gsFont == 0 || m_isImageFont != 0);
  87         uintptr_t hashCodes[2] = { (uintptr_t)m_font, m_isImageFont << 2 | m_syntheticBold << 1 | m_syntheticOblique };
  88         return StringImpl::computeHash(reinterpret_cast<UChar*>(hashCodes), sizeof(hashCodes) / sizeof(UChar));
  89     }
  90
  91     const FontPlatformData& operator=(const FontPlatformData& f);
  92
  93     bool operator==(const FontPlatformData& other) const
  94     {
  95         return m_font == other.m_font && m_syntheticBold == other.m_syntheticBold && m_syntheticOblique == other.m_syntheticOblique &&
  96                m_gsFont == other.m_gsFont && m_size == other.m_size && m_isImageFont == other.m_isImageFont;
  97     }
  98
  99     GSFontRef font() const { return m_font; }
 100     void setFont(GSFontRef font);
 101
 102     bool roundsGlyphAdvances() const { return false; }
 103 #if USE(CORE_TEXT)
 104     bool allowsLigatures() const;
 105 #else
 106     bool allowsLigatures() const { return false; }
 107 #endif
 108
 109
 110 private:
 111     static GSFontRef hashTableDeletedFontValue() { return reinterpret_cast<GSFontRef>(-1); }
 112
 113     GSFontRef m_font;
 114 };
 115
 116 }
 117
 118 #endif