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/*
Copyright (C) 2008 Holger Hans Peter Freyther
Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
Copyright (C) 2015 The Qt Company Ltd
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "FontPlatformData.h"
#include "FontCascade.h"
#include "SharedBuffer.h"
#include <wtf/text/WTFString.h>
namespace WebCore {
// See http://www.w3.org/TR/css3-fonts/#font-weight-prop
#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
static inline QFont::Weight toQFontWeight(FontWeight fontWeight)
{
switch (fontWeight) {
case FontWeight100:
return QFont::Thin;
case FontWeight200:
return QFont::ExtraLight;
case FontWeight300:
return QFont::Light;
case FontWeight400:
return QFont::Normal;
case FontWeight500:
return QFont::Medium;
case FontWeight600:
return QFont::DemiBold;
case FontWeight700:
return QFont::Bold;
case FontWeight800:
return QFont::ExtraBold;
case FontWeight900:
return QFont::Black;
}
Q_UNREACHABLE();
}
#else
static inline QFont::Weight toQFontWeight(FontWeight fontWeight)
{
switch (fontWeight) {
case FontWeight100:
case FontWeight200:
case FontWeight300:
return QFont::Light; // QFont::Light == Weight of 25
case FontWeight400:
case FontWeight500:
return QFont::Normal; // QFont::Normal == Weight of 50
case FontWeight600:
return QFont::DemiBold; // QFont::DemiBold == Weight of 63
case FontWeight700:
return QFont::Bold; // QFont::Bold == Weight of 75
case FontWeight800:
case FontWeight900:
return QFont::Black; // QFont::Black == Weight of 87
}
Q_UNREACHABLE();
}
#endif
static inline bool isEmptyValue(const float size, const bool bold, const bool oblique)
{
// this is the empty value by definition of the trait FontDataCacheKeyTraits
return !bold && !oblique && size == 0.f;
}
FontPlatformData::FontPlatformData(float size, bool bold, bool oblique)
{
if (!isEmptyValue(size, bold, oblique))
m_data = adoptRef(new FontPlatformDataPrivate(size, bold, oblique));
}
FontPlatformData::FontPlatformData(const FontDescription& description, const AtomicString& familyName, int wordSpacing, int letterSpacing)
: m_data(adoptRef(new FontPlatformDataPrivate()))
{
QFont font;
int requestedSize = description.computedPixelSize();
font.setFamily(familyName);
if (requestedSize)
font.setPixelSize(requestedSize);
font.setItalic(description.italic());
font.setWeight(toQFontWeight(description.weight()));
font.setWordSpacing(wordSpacing);
font.setLetterSpacing(QFont::AbsoluteSpacing, letterSpacing);
if (!FontCascade::shouldUseSmoothing())
font.setStyleStrategy(static_cast<QFont::StyleStrategy>(QFont::NoAntialias | QFont::ForceOutline));
else
font.setStyleStrategy(QFont::ForceOutline);
m_data->bold = font.bold();
// WebKit allows font size zero but QFont does not. We will return
// m_data->size if a font size of zero is requested and pixelSize()
// otherwise.
m_data->size = (!requestedSize) ? requestedSize : font.pixelSize();
m_data->rawFont = QRawFont::fromFont(font, QFontDatabase::Any);
}
FontPlatformData::FontPlatformData(const FontPlatformData& other, float size)
: m_data(adoptRef(new FontPlatformDataPrivate()))
{
m_data->rawFont = other.m_data->rawFont;
m_data->bold = other.m_data->bold;
m_data->oblique = other.m_data->oblique;
m_data->rawFont.setPixelSize(size);
m_data->size = m_data->rawFont.pixelSize();
}
bool FontPlatformData::operator==(const FontPlatformData& other) const
{
if (m_data == other.m_data)
return true;
if (!m_data || !other.m_data || m_data->isDeletedValue || other.m_data->isDeletedValue)
return false;
const bool equals = (m_data->size == other.m_data->size
&& m_data->bold == other.m_data->bold
&& m_data->oblique == other.m_data->oblique
&& m_data->rawFont == other.m_data->rawFont);
return equals;
}
PassRefPtr<SharedBuffer> FontPlatformData::openTypeTable(uint32_t table) const
{
const char tag[4] = {
char(table & 0xff),
char((table & 0xff00) >> 8),
char((table & 0xff0000) >> 16),
char(table >> 24)
};
QByteArray tableData = m_data->rawFont.fontTable(tag);
// TODO: Wrap SharedBuffer around QByteArray when it's possible
return SharedBuffer::create(tableData.data(), tableData.size());
}
unsigned FontPlatformData::hash() const
{
if (!m_data)
return 0;
if (m_data->isDeletedValue)
return 1;
return qHash(m_data->rawFont.familyName()) ^ qHash(m_data->rawFont.style())
^ qHash(m_data->rawFont.weight())
^ qHash(*reinterpret_cast<quint32*>(&m_data->size));
}
#ifndef NDEBUG
String FontPlatformData::description() const
{
return String();
}
#endif
}
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