Home | History | Annotate | Download | only in chromium 
      1 /*
      2  * Copyright (C) 2006, 2007 Apple Computer, Inc.
      3  * Copyright (c) 2006, 2007, 2008, 2009, Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include "config.h"
     33 #include "FontPlatformData.h"
     34 
     35 #include <windows.h>
     36 #include <objidl.h>
     37 #include <mlang.h>
     38 
     39 #include "PlatformBridge.h"
     40 #include "SkiaFontWin.h"
     41 
     42 namespace WebCore {
     43 
     44 FontPlatformData::FontPlatformData(WTF::HashTableDeletedValueType)
     45     : m_font(hashTableDeletedFontValue())
     46     , m_size(-1)
     47     , m_scriptCache(0)
     48     , m_scriptFontProperties(0)
     49 {
     50 }
     51 
     52 FontPlatformData::FontPlatformData()
     53     : m_font(0)
     54     , m_size(0)
     55     , m_scriptCache(0)
     56     , m_scriptFontProperties(0)
     57 {
     58 }
     59 
     60 FontPlatformData::FontPlatformData(HFONT font, float size)
     61     : m_font(RefCountedHFONT::create(font))
     62     , m_size(size)
     63     , m_scriptCache(0)
     64     , m_scriptFontProperties(0)
     65 {
     66 }
     67 
     68 // FIXME: this constructor is needed for SVG fonts but doesn't seem to do much
     69 FontPlatformData::FontPlatformData(float size, bool bold, bool oblique)
     70     : m_font(0)
     71     , m_size(size)
     72     , m_scriptCache(0)
     73     , m_scriptFontProperties(0)
     74 {
     75 }
     76 
     77 FontPlatformData::FontPlatformData(const FontPlatformData& data)
     78     : m_font(data.m_font)
     79     , m_size(data.m_size)
     80     , m_scriptCache(0)
     81     , m_scriptFontProperties(0)
     82 {
     83 }
     84 
     85 FontPlatformData& FontPlatformData::operator=(const FontPlatformData& data)
     86 {
     87     if (this != &data) {
     88         m_font = data.m_font;
     89         m_size = data.m_size;
     90 
     91         // The following fields will get re-computed if necessary.
     92         ScriptFreeCache(&m_scriptCache);
     93         m_scriptCache = 0;
     94 
     95         delete m_scriptFontProperties;
     96         m_scriptFontProperties = 0;
     97     }
     98     return *this;
     99 }
    100 
    101 FontPlatformData::~FontPlatformData()
    102 {
    103     ScriptFreeCache(&m_scriptCache);
    104     m_scriptCache = 0;
    105 
    106     delete m_scriptFontProperties;
    107     m_scriptFontProperties = 0;
    108 }
    109 
    110 FontPlatformData::RefCountedHFONT::~RefCountedHFONT()
    111 {
    112     if (m_hfont != reinterpret_cast<HFONT>(-1)) {
    113         SkiaWinOutlineCache::removePathsForFont(m_hfont);
    114         DeleteObject(m_hfont);
    115     }
    116 }
    117 
    118 FontPlatformData::RefCountedHFONT* FontPlatformData::hashTableDeletedFontValue()
    119 {
    120     static RefPtr<RefCountedHFONT> deletedValue =
    121         RefCountedHFONT::create(reinterpret_cast<HFONT>(-1));
    122     return deletedValue.get();
    123 }
    124 
    125 SCRIPT_FONTPROPERTIES* FontPlatformData::scriptFontProperties() const
    126 {
    127     if (!m_scriptFontProperties) {
    128         m_scriptFontProperties = new SCRIPT_FONTPROPERTIES;
    129         memset(m_scriptFontProperties, 0, sizeof(SCRIPT_FONTPROPERTIES));
    130         m_scriptFontProperties->cBytes = sizeof(SCRIPT_FONTPROPERTIES);
    131         HRESULT result = ScriptGetFontProperties(0, scriptCache(),
    132                                                  m_scriptFontProperties);
    133         if (result == E_PENDING) {
    134             HDC dc = GetDC(0);
    135             HGDIOBJ oldFont = SelectObject(dc, hfont());
    136             HRESULT hr = ScriptGetFontProperties(dc, scriptCache(),
    137                                                  m_scriptFontProperties);
    138             if (S_OK != hr) {
    139                 if (PlatformBridge::ensureFontLoaded(hfont())) {
    140                     // FIXME: Handle gracefully the error if this call also fails.
    141                     hr = ScriptGetFontProperties(dc, scriptCache(),
    142                                                  m_scriptFontProperties);
    143                     if (S_OK != hr) {
    144                         LOG_ERROR("Unable to get the font properties after second attempt");
    145                     }
    146                 }
    147             }
    148 
    149             SelectObject(dc, oldFont);
    150             ReleaseDC(0, dc);
    151         }
    152     }
    153     return m_scriptFontProperties;
    154 }
    155 
    156 #ifndef NDEBUG
    157 String FontPlatformData::description() const
    158 {
    159     return String();
    160 }
    161 #endif
    162 
    163 }
    164