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      1 /*
      2  * Copyright (C) 2007, 2008, 2010, 2011 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "core/css/CSSFontFaceSource.h"
     28 
     29 #include "core/css/CSSFontFace.h"
     30 #include "platform/fonts/FontCacheKey.h"
     31 #include "platform/fonts/FontDescription.h"
     32 #include "platform/fonts/FontFaceCreationParams.h"
     33 #include "platform/fonts/SimpleFontData.h"
     34 
     35 namespace blink {
     36 
     37 CSSFontFaceSource::CSSFontFaceSource()
     38     : m_face(nullptr)
     39 {
     40 }
     41 
     42 CSSFontFaceSource::~CSSFontFaceSource()
     43 {
     44 }
     45 
     46 PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(const FontDescription& fontDescription)
     47 {
     48     // If the font hasn't loaded or an error occurred, then we've got nothing.
     49     if (!isValid())
     50         return nullptr;
     51 
     52     if (isLocal()) {
     53         // We're local. Just return a SimpleFontData from the normal cache.
     54         return createFontData(fontDescription);
     55     }
     56 
     57     // See if we have a mapping in our FontData cache.
     58     FontCacheKey key = fontDescription.cacheKey(FontFaceCreationParams());
     59 
     60     RefPtr<SimpleFontData>& fontData = m_fontDataTable.add(key.hash(), nullptr).storedValue->value;
     61     if (!fontData)
     62         fontData = createFontData(fontDescription);
     63     return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
     64 }
     65 
     66 void CSSFontFaceSource::trace(Visitor* visitor)
     67 {
     68     visitor->trace(m_face);
     69 }
     70 
     71 }
     72