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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 "platform/fonts/FontCustomPlatformData.h"
     23 
     24 #include "platform/SharedBuffer.h"
     25 #include "platform/fonts/FontPlatformData.h"
     26 #include "platform/fonts/opentype/OpenTypeSanitizer.h"
     27 #include "third_party/skia/include/core/SkStream.h"
     28 #include "third_party/skia/include/core/SkTypeface.h"
     29 #include "wtf/PassOwnPtr.h"
     30 
     31 #include <ApplicationServices/ApplicationServices.h>
     32 
     33 namespace WebCore {
     34 
     35 FontCustomPlatformData::FontCustomPlatformData(CGFontRef cgFont, PassRefPtr<SkTypeface> typeface)
     36     : m_cgFont(AdoptCF, cgFont)
     37     , m_typeface(typeface)
     38 {
     39 }
     40 
     41 FontCustomPlatformData::~FontCustomPlatformData()
     42 {
     43 }
     44 
     45 FontPlatformData FontCustomPlatformData::fontPlatformData(float size, bool bold, bool italic, FontOrientation orientation, FontWidthVariant widthVariant)
     46 {
     47     return FontPlatformData(m_cgFont.get(), size, bold, italic, orientation, widthVariant);
     48 }
     49 
     50 PassOwnPtr<FontCustomPlatformData> FontCustomPlatformData::create(SharedBuffer* buffer)
     51 {
     52     ASSERT_ARG(buffer, buffer);
     53 
     54     OpenTypeSanitizer sanitizer(buffer);
     55     RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
     56     if (!transcodeBuffer)
     57         return nullptr; // validation failed.
     58     buffer = transcodeBuffer.get();
     59 
     60     RetainPtr<CFDataRef> bufferData(AdoptCF, CFDataCreate(0, reinterpret_cast<const UInt8*>(buffer->data()), buffer->size()));
     61     RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateWithCFData(bufferData.get()));
     62     RetainPtr<CGFontRef> cgFontRef(AdoptCF, CGFontCreateWithDataProvider(dataProvider.get()));
     63     if (!cgFontRef)
     64         return nullptr;
     65 
     66     // It's unclear whether this is used. It seems like it has the effect of priming the cache.
     67     // Since we store this anyways, it might be worthwhile just plumbing this to FontMac.cpp in
     68     // a more obvious way.
     69     // FIXME: Remove this, add an explicit use, or add a comment explaining why this exists.
     70     RefPtr<SkMemoryStream> stream = adoptRef(new SkMemoryStream(buffer->getAsSkData().get()));
     71     RefPtr<SkTypeface> typeface = adoptRef(SkTypeface::CreateFromStream(stream.get()));
     72     if (!typeface)
     73         return nullptr;
     74 
     75     return adoptPtr(new FontCustomPlatformData(cgFontRef.leakRef(), typeface.release()));
     76 }
     77 
     78 bool FontCustomPlatformData::supportsFormat(const String& format)
     79 {
     80     return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format);
     81 }
     82 
     83 }
     84