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/*
* Copyright (C) 2007 Nicholas Shanks <contact@nickshanks.com>
* Copyright (C) 2008 Apple Inc. All rights reserved.
*
* 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "platform/fonts/FontDescription.h"
#include "RuntimeEnabledFeatures.h"
#include "wtf/text/AtomicStringHash.h"
#include "wtf/text/StringHash.h"
namespace WebCore {
struct SameSizeAsFontDescription {
FontFamily familyList;
RefPtr<FontFeatureSettings> m_featureSettings;
float sizes[2];
// FXIME: Make them fit into one word.
uint32_t bitfields;
uint32_t bitfields2 : 8;
};
COMPILE_ASSERT(sizeof(FontDescription) == sizeof(SameSizeAsFontDescription), FontDescription_should_stay_small);
bool FontDescription::s_useSubpixelTextPositioning = false;
FontWeight FontDescription::lighterWeight(void) const
{
switch (m_weight) {
case FontWeight100:
case FontWeight200:
case FontWeight300:
case FontWeight400:
case FontWeight500:
return FontWeight100;
case FontWeight600:
case FontWeight700:
return FontWeight400;
case FontWeight800:
case FontWeight900:
return FontWeight700;
}
ASSERT_NOT_REACHED();
return FontWeightNormal;
}
FontWeight FontDescription::bolderWeight(void) const
{
switch (m_weight) {
case FontWeight100:
case FontWeight200:
case FontWeight300:
return FontWeight400;
case FontWeight400:
case FontWeight500:
return FontWeight700;
case FontWeight600:
case FontWeight700:
case FontWeight800:
case FontWeight900:
return FontWeight900;
}
ASSERT_NOT_REACHED();
return FontWeightNormal;
}
FontTraitsMask FontDescription::traitsMask() const
{
return static_cast<FontTraitsMask>((m_italic ? FontStyleItalicMask : FontStyleNormalMask)
| (m_smallCaps ? FontVariantSmallCapsMask : FontVariantNormalMask)
| (FontWeight100Mask << (m_weight - FontWeight100)));
}
void FontDescription::setTraitsMask(FontTraitsMask traitsMask)
{
switch (traitsMask & FontWeightMask) {
case FontWeight100Mask:
setWeight(FontWeight100);
break;
case FontWeight200Mask:
setWeight(FontWeight200);
break;
case FontWeight300Mask:
setWeight(FontWeight300);
break;
case FontWeight400Mask:
setWeight(FontWeight400);
break;
case FontWeight500Mask:
setWeight(FontWeight500);
break;
case FontWeight600Mask:
setWeight(FontWeight600);
break;
case FontWeight700Mask:
setWeight(FontWeight700);
break;
case FontWeight800Mask:
setWeight(FontWeight800);
break;
case FontWeight900Mask:
setWeight(FontWeight900);
break;
default:
ASSERT_NOT_REACHED();
}
setItalic((traitsMask & FontStyleItalicMask) ? FontItalicOn : FontItalicOff);
setSmallCaps((traitsMask & FontVariantSmallCapsMask) ? FontSmallCapsOn : FontSmallCapsOff);
}
FontDescription FontDescription::makeNormalFeatureSettings() const
{
FontDescription normalDescription(*this);
normalDescription.setFeatureSettings(0);
return normalDescription;
}
float FontDescription::effectiveFontSize() const
{
float size = (RuntimeEnabledFeatures::subpixelFontScalingEnabled())
? computedSize()
: computedPixelSize();
// Ensure that the effective precision matches the font-cache precision.
// This guarantees that the same precision is used regardless of cache status.
return floorf(size * FontCacheKey::precisionMultiplier()) / FontCacheKey::precisionMultiplier();
}
FontCacheKey FontDescription::cacheKey(const AtomicString& familyName, FontTraitsMask desiredTraits) const
{
FontTraitsMask traits = desiredTraits
? desiredTraits
: traitsMask();
unsigned options =
static_cast<unsigned>(m_syntheticItalic) << 8 | // bit 9
static_cast<unsigned>(m_syntheticBold) << 7 | // bit 8
static_cast<unsigned>(m_fontSmoothing) << 5 | // bits 6-7
static_cast<unsigned>(m_textRendering) << 3 | // bits 4-5
static_cast<unsigned>(m_orientation) << 2 | // bit 3
static_cast<unsigned>(m_usePrinterFont) << 1 | // bit 2
static_cast<unsigned>(m_subpixelTextPosition); // bit 1
return FontCacheKey(familyName, effectiveFontSize(), options | traits << 9);
}
} // namespace WebCore
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