src/third_party/WebKit/Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp

   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 }