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/*
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CachedFont.h"
#include "CachedFontClient.h"
#include "CachedResourceClientWalker.h"
#include "CachedResourceLoader.h"
#include "FontCustomPlatformData.h"
#include "FontDescription.h"
#include "FontPlatformData.h"
#include "SharedBuffer.h"
#include "TextResourceDecoder.h"
#include "TypedElementDescendantIterator.h"
#include "WOFFFileFormat.h"
#include <wtf/Vector.h>
#if USE(DIRECT2D)
#include <dwrite.h>
#endif
namespace WebCore {
CachedFont::CachedFont(CachedResourceRequest&& request, SessionID sessionID, Type type)
: CachedResource(WTFMove(request), type, sessionID)
, m_loadInitiated(false)
, m_hasCreatedFontDataWrappingResource(false)
{
}
CachedFont::~CachedFont()
{
}
void CachedFont::load(CachedResourceLoader&)
{
// Don't load the file yet. Wait for an access before triggering the load.
setLoading(true);
}
void CachedFont::didAddClient(CachedResourceClient& client)
{
ASSERT(client.resourceClientType() == CachedFontClient::expectedType());
if (!isLoading())
static_cast<CachedFontClient&>(client).fontLoaded(*this);
}
void CachedFont::finishLoading(SharedBuffer* data)
{
m_data = data;
setEncodedSize(m_data.get() ? m_data->size() : 0);
setLoading(false);
checkNotify();
}
void CachedFont::beginLoadIfNeeded(CachedResourceLoader& loader)
{
if (!m_loadInitiated) {
m_loadInitiated = true;
CachedResource::load(loader);
}
}
bool CachedFont::ensureCustomFontData(const AtomicString&)
{
return ensureCustomFontData(m_data.get());
}
bool CachedFont::ensureCustomFontData(SharedBuffer* data)
{
if (!m_fontCustomPlatformData && !errorOccurred() && !isLoading() && data) {
bool wrapping;
m_fontCustomPlatformData = createCustomFontData(*data, wrapping);
m_hasCreatedFontDataWrappingResource = m_fontCustomPlatformData && wrapping;
if (!m_fontCustomPlatformData)
setStatus(DecodeError);
}
return m_fontCustomPlatformData.get();
}
std::unique_ptr<FontCustomPlatformData> CachedFont::createCustomFontData(SharedBuffer& bytes, bool& wrapping)
{
wrapping = true;
#if !PLATFORM(COCOA)
if (isWOFF(bytes)) {
wrapping = false;
Vector<char> convertedFont;
if (!convertWOFFToSfnt(bytes, convertedFont))
return nullptr;
auto buffer = SharedBuffer::create(WTFMove(convertedFont));
return createFontCustomPlatformData(buffer);
}
#endif
return createFontCustomPlatformData(bytes);
}
RefPtr<Font> CachedFont::createFont(const FontDescription& fontDescription, const AtomicString&, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
{
return Font::create(platformDataFromCustomData(fontDescription, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities), Font::Origin::Remote);
}
FontPlatformData CachedFont::platformDataFromCustomData(const FontDescription& fontDescription, bool bold, bool italic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
{
ASSERT(m_fontCustomPlatformData);
return platformDataFromCustomData(*m_fontCustomPlatformData, fontDescription, bold, italic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities);
}
FontPlatformData CachedFont::platformDataFromCustomData(FontCustomPlatformData& fontCustomPlatformData, const FontDescription& fontDescription, bool bold, bool italic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
{
#if PLATFORM(COCOA)
return fontCustomPlatformData.fontPlatformData(fontDescription, bold, italic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities);
#else
UNUSED_PARAM(fontFaceFeatures);
UNUSED_PARAM(fontFaceVariantSettings);
UNUSED_PARAM(fontFaceCapabilities);
return fontCustomPlatformData.fontPlatformData(fontDescription, bold, italic);
#endif
}
void CachedFont::allClientsRemoved()
{
m_fontCustomPlatformData = nullptr;
}
void CachedFont::checkNotify()
{
if (isLoading())
return;
CachedResourceClientWalker<CachedFontClient> walker(m_clients);
while (CachedFontClient* client = walker.next())
client->fontLoaded(*this);
}
bool CachedFont::mayTryReplaceEncodedData() const
{
// If a FontCustomPlatformData has ever been constructed to wrap the internal resource buffer then it still might be in use somewhere.
// That platform font object might directly reference the encoded data buffer behind this CachedFont,
// so replacing it is unsafe.
return !m_hasCreatedFontDataWrappingResource;
}
}
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