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/*
* Copyright (C) 2007 Nicholas Shanks <contact@nickshanks.com>
* Copyright (C) 2008-2021 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 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 "FontCascadeDescription.h"
#include <wtf/text/StringHash.h>
#if USE(CORE_TEXT)
#include "FontCascade.h"
#endif
namespace WebCore {
struct SameSizeAsFontCascadeDescription {
Vector<void*> vector;
Vector<void*> vector2;
FontPalette palette;
FontSizeAdjust sizeAdjust;
FontVariantAlternates alternates;
AtomString string;
AtomString string2;
int16_t fontSelectionRequest[3];
float size;
unsigned bitfields1;
unsigned bitfields2 : 22;
void* array;
float size2;
unsigned bitfields3 : 10;
};
#if !defined(__m68k__)
static_assert(sizeof(FontCascadeDescription) == sizeof(SameSizeAsFontCascadeDescription), "FontCascadeDescription should stay small");
#endif
FontCascadeDescription::FontCascadeDescription()
: m_families(RefCountedFixedVector<AtomString>::create(1))
, m_isAbsoluteSize(false)
, m_kerning(static_cast<unsigned>(Kerning::Auto))
, m_keywordSize(0)
, m_fontSmoothing(static_cast<unsigned>(FontSmoothingMode::AutoSmoothing))
, m_isSpecifiedFont(false)
{
}
FontSelectionValue FontCascadeDescription::lighterWeight(FontSelectionValue weight)
{
if (weight < FontSelectionValue(100))
return weight;
if (weight < FontSelectionValue(550))
return FontSelectionValue(100);
if (weight < FontSelectionValue(750))
return FontSelectionValue(400);
return FontSelectionValue(700);
}
FontSelectionValue FontCascadeDescription::bolderWeight(FontSelectionValue weight)
{
if (weight < FontSelectionValue(350))
return FontSelectionValue(400);
if (weight < FontSelectionValue(550))
return FontSelectionValue(700);
if (weight < FontSelectionValue(900))
return FontSelectionValue(900);
return weight;
}
#if ENABLE(TEXT_AUTOSIZING)
bool FontCascadeDescription::familiesEqualForTextAutoSizing(const FontCascadeDescription& other) const
{
unsigned thisFamilyCount = familyCount();
unsigned otherFamilyCount = other.familyCount();
if (thisFamilyCount != otherFamilyCount)
return false;
for (unsigned i = 0; i < thisFamilyCount; ++i) {
if (!familyNamesAreEqual(familyAt(i), other.familyAt(i)))
return false;
}
return true;
}
#endif // ENABLE(TEXT_AUTOSIZING)
bool FontCascadeDescription::familyNamesAreEqual(const AtomString& family1, const AtomString& family2)
{
#if PLATFORM(COCOA)
if (family1.startsWith('.'))
return family1 == family2;
#endif
return ASCIICaseInsensitiveHash::equal(family1, family2);
}
unsigned FontCascadeDescription::familyNameHash(const AtomString& family)
{
#if PLATFORM(COCOA)
if (family.startsWith('.'))
return family.existingHash();
#endif
return ASCIICaseInsensitiveHash::hash(family);
}
String FontCascadeDescription::foldedFamilyName(const String& family)
{
#if PLATFORM(COCOA)
if (family.startsWith('.'))
return family;
#endif
return family.convertToASCIILowercase();
}
FontSmoothingMode FontCascadeDescription::usedFontSmoothing() const
{
auto fontSmoothingMode = fontSmoothing();
#if USE(CORE_TEXT)
if (FontCascade::shouldDisableFontSubpixelAntialiasingForTesting() && (fontSmoothingMode == FontSmoothingMode::AutoSmoothing || fontSmoothingMode == FontSmoothingMode::SubpixelAntialiased))
return FontSmoothingMode::Antialiased;
#endif
return fontSmoothingMode;
}
} // namespace WebCore
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