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      1 /*
      2  * Copyright 2009, The Android Open Source Project
      3  * Copyright (C) 2006 Apple Computer, Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 // This file is part of the internal font implementation.  It should not be included by anyone other than
     28 // FontMac.cpp, FontWin.cpp and Font.cpp.
     29 
     30 #ifndef FontPlatformData_h
     31 #define FontPlatformData_h
     32 
     33 #include "FontOrientation.h"
     34 #include "TextOrientation.h"
     35 #include <wtf/text/StringImpl.h>
     36 
     37 #ifndef NDEBUG
     38 #include "PlatformString.h"
     39 #endif
     40 
     41 class SkPaint;
     42 class SkTypeface;
     43 
     44 struct HB_FaceRec_;
     45 
     46 namespace WebCore {
     47 
     48 class FontPlatformData {
     49 public:
     50     static FontPlatformData Deleted() {
     51         return FontPlatformData(NULL, -1, false, false);
     52     }
     53 
     54     FontPlatformData();
     55     FontPlatformData(const FontPlatformData&);
     56     FontPlatformData(SkTypeface*, float textSize, bool fakeBold, bool fakeItalic,
     57                      FontOrientation = Horizontal, TextOrientation = TextOrientationVerticalRight);
     58     FontPlatformData(const FontPlatformData& src, float textSize);
     59     FontPlatformData(float size, bool syntheticBold, bool syntheticOblique);
     60     FontPlatformData(const FontPlatformData& src, SkTypeface* typeface);
     61 
     62     ~FontPlatformData();
     63 
     64     FontPlatformData(WTF::HashTableDeletedValueType)
     65         : mTypeface(hashTableDeletedFontValue()) { }
     66     bool isHashTableDeletedValue() const {
     67         return mTypeface == hashTableDeletedFontValue();
     68     }
     69 
     70     FontOrientation orientation() const { return mOrientation; }
     71     void setOrientation(FontOrientation orientation) { mOrientation = orientation; }
     72     FontPlatformData& operator=(const FontPlatformData&);
     73     bool operator==(const FontPlatformData& a) const;
     74 
     75     void     setupPaint(SkPaint*) const;
     76 
     77     // -------------------------------------------------------------------------
     78     // Return Skia's unique id for this font. This encodes both the style and
     79     // the font's file name so refers to a single face.
     80     // -------------------------------------------------------------------------
     81     uint32_t uniqueID() const;
     82 
     83     float size() const { return mTextSize; }
     84     unsigned hash() const;
     85     int emSizeInFontUnits() const;
     86     bool isFixedPitch() const;
     87 
     88 #ifndef NDEBUG
     89     String description() const { return ""; }
     90 #endif
     91 
     92     HB_FaceRec_* harfbuzzFace() const;
     93     SkTypeface* typeface() const { return mTypeface; }
     94 
     95     bool isFakeBold() const { return mFakeBold; }
     96     bool isFakeItalic() const { return mFakeItalic; }
     97 
     98 private:
     99     class RefCountedHarfbuzzFace : public RefCounted<RefCountedHarfbuzzFace> {
    100     public:
    101         static PassRefPtr<RefCountedHarfbuzzFace> create(HB_FaceRec_* harfbuzzFace)
    102         {
    103             return adoptRef(new RefCountedHarfbuzzFace(harfbuzzFace));
    104         }
    105 
    106         ~RefCountedHarfbuzzFace();
    107 
    108         HB_FaceRec_* face() const { return m_harfbuzzFace; }
    109 
    110     private:
    111         RefCountedHarfbuzzFace(HB_FaceRec_* harfbuzzFace) : m_harfbuzzFace(harfbuzzFace)
    112         {
    113         }
    114 
    115         HB_FaceRec_* m_harfbuzzFace;
    116     };
    117 
    118     SkTypeface* mTypeface;
    119     float       mTextSize;
    120     mutable int mEmSizeInFontUnits;
    121     bool        mFakeBold;
    122     bool        mFakeItalic;
    123     FontOrientation mOrientation;
    124     TextOrientation mTextOrientation;
    125     mutable RefPtr<RefCountedHarfbuzzFace> m_harfbuzzFace;
    126 
    127     static SkTypeface* hashTableDeletedFontValue() {
    128         return reinterpret_cast<SkTypeface*>(-1);
    129     }
    130 };
    131 
    132 } /* namespace */
    133 
    134 #endif
    135