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
33namespace blink {
34
35FontCustomPlatformData::FontCustomPlatformData(CGFontRef cgFont, PassRefPtr<SkTypeface> typeface)
36    : m_cgFont(AdoptCF, cgFont)
37    , m_typeface(typeface)
38{
39}
40
41FontCustomPlatformData::~FontCustomPlatformData()
42{
43}
44
45FontPlatformData 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
50PassOwnPtr<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
78bool FontCustomPlatformData::supportsFormat(const String& format)
79{
80    return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format);
81}
82
83} // namespace blink
84