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      1 /*
      2  * Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #include "config.h"
     22 #include "core/platform/graphics/FontCustomPlatformData.h"
     23 
     24 #include "core/platform/SharedBuffer.h"
     25 #include "core/platform/graphics/FontPlatformData.h"
     26 #include "core/platform/graphics/opentype/OpenTypeSanitizer.h"
     27 #include "core/platform/graphics/skia/SkiaSharedBufferStream.h"
     28 #include "third_party/skia/include/core/SkStream.h"
     29 #include "third_party/skia/include/core/SkTypeface.h"
     30 #include "wtf/PassOwnPtr.h"
     31 
     32 #include <ApplicationServices/ApplicationServices.h>
     33 
     34 namespace WebCore {
     35 
     36 FontCustomPlatformData::FontCustomPlatformData(CGFontRef cgFont, PassRefPtr<SkTypeface> typeface)
     37     : m_cgFont(AdoptCF, cgFont)
     38     , m_typeface(typeface)
     39 {
     40 }
     41 
     42 FontCustomPlatformData::~FontCustomPlatformData()
     43 {
     44 }
     45 
     46 FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation orientation, FontWidthVariant widthVariant)
     47 {
     48     return FontPlatformData(m_cgFont.get(), size, bold, italic, orientation, widthVariant);
     49 }
     50 
     51 PassOwnPtr<FontCustomPlatformData> FontCustomPlatformData::create(SharedBuffer* buffer)
     52 {
     53     ASSERT_ARG(buffer, buffer);
     54 
     55     OpenTypeSanitizer sanitizer(buffer);
     56     RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
     57     if (!transcodeBuffer)
     58         return nullptr; // validation failed.
     59     buffer = transcodeBuffer.get();
     60 
     61     RetainPtr<CFDataRef> bufferData(AdoptCF, CFDataCreate(0, reinterpret_cast<const UInt8*>(buffer->data()), buffer->size()));
     62     RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateWithCFData(bufferData.get()));
     63     RetainPtr<CGFontRef> cgFontRef(AdoptCF, CGFontCreateWithDataProvider(dataProvider.get()));
     64     if (!cgFontRef)
     65         return nullptr;
     66 
     67     // It's unclear whether this is used. It seems like it has the effect of priming the cache.
     68     // Since we store this anyways, it might be worthwhile just plumbing this to FontMac.cpp in
     69     // a more obvious way.
     70     // FIXME: Remove this, add an explicit use, or add a comment explaining why this exists.
     71     RefPtr<SkiaSharedBufferStream> stream = SkiaSharedBufferStream::create(buffer);
     72     RefPtr<SkTypeface> typeface = adoptRef(SkTypeface::CreateFromStream(stream.get()));
     73     if (!typeface)
     74         return nullptr;
     75 
     76     return adoptPtr(new FontCustomPlatformData(cgFontRef.leakRef(), typeface.release()));
     77 }
     78 
     79 bool FontCustomPlatformData::supportsFormat(const String& format)
     80 {
     81     return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format);
     82 }
     83 
     84 }
     85