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/*
* Copyright (C) 2024 Igalia S.L.
*
* 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 "FontPlatformData.h"
#include "FontCache.h"
#include "FontCustomPlatformData.h"
#include "FontRenderOptions.h"
#include "FontVariationsSkia.h"
#include "NotImplemented.h"
#include "OpenTypeTypes.h"
#include "SkiaHarfBuzzFont.h"
#include <skia/core/SkStream.h>
#include <skia/core/SkTypeface.h>
#include <wtf/Hasher.h>
#include <wtf/VectorHash.h>
namespace WebCore {
FontPlatformData::FontPlatformData(sk_sp<SkTypeface>&& typeface, float size, bool syntheticBold, bool syntheticOblique, FontOrientation orientation, FontWidthVariant widthVariant, TextRenderingMode textRenderingMode, Vector<hb_feature_t>&& features, const FontCustomPlatformData* customPlatformData)
: FontPlatformData(size, syntheticBold, syntheticOblique, orientation, widthVariant, textRenderingMode, customPlatformData)
{
m_font = SkFont(typeface, m_size);
m_features = WTFMove(features);
platformDataInit();
}
FontPlatformData::FontPlatformData(float size, FontOrientation&& orientation, FontWidthVariant&& widthVariant, TextRenderingMode&& textRenderingMode, bool syntheticBold, bool syntheticOblique, RefPtr<FontCustomPlatformData>&& customPlatformData)
: FontPlatformData(size, syntheticBold, syntheticOblique, orientation, widthVariant, textRenderingMode, customPlatformData.get())
{
m_font = SkFont(customPlatformData->m_typeface, m_size);
platformDataInit();
}
void FontPlatformData::platformDataInit()
{
m_font.setEmbolden(m_syntheticBold);
m_font.setSkewX(m_syntheticOblique ? -SK_Scalar1 / 4 : 0);
bool useSubpixelPositioning = FontRenderOptions::singleton().useSubpixelPositioning();
m_font.setEdging(FontRenderOptions::singleton().antialias());
if (m_font.getEdging() == SkFont::Edging::kAlias) {
// Force full hinting when antialiasing is disabled like Cairo does.
m_font.setHinting(SkFontHinting::kFull);
} else if (useSubpixelPositioning) {
// Disable hinting when subpixel positioning is enabled.
m_font.setHinting(SkFontHinting::kNone);
} else
m_font.setHinting(FontRenderOptions::singleton().hinting());
// Force subpixel positioning when not running tests and full hinting was not requested.
bool forceSubpixel = !FontRenderOptions::singleton().isHintingDisabledForTesting() && m_font.getHinting() != SkFontHinting::kFull;
m_font.setSubpixel(forceSubpixel || useSubpixelPositioning);
m_font.setLinearMetrics(m_font.getHinting() == SkFontHinting::kNone && m_font.isSubpixel());
m_hbFont = SkiaHarfBuzzFont::getOrCreate(*m_font.getTypeface());
}
std::optional<FontPlatformData> FontPlatformData::fromIPCData(float size, FontOrientation&& orientation, FontWidthVariant&& widthVariant, TextRenderingMode&& textRenderingMode, bool syntheticBold, bool syntheticOblique, IPCData&& ipcData)
{
return WTF::switchOn(ipcData,
[&] (const FontPlatformSerializedData& d) -> std::optional<FontPlatformData> {
if (sk_sp<SkTypeface> typeface = SkTypeface::MakeDeserialize(SkMemoryStream::Make(d.typefaceData).get(), nullptr))
return FontPlatformData(WTFMove(typeface), size, syntheticBold, syntheticOblique, WTFMove(orientation), WTFMove(widthVariant), WTFMove(textRenderingMode), { });
return std::nullopt;
},
[&] (FontPlatformSerializedCreationData& d) -> std::optional<FontPlatformData> {
auto fontFaceData = SharedBuffer::create(WTFMove(d.fontFaceData));
if (RefPtr fontCustomPlatformData = FontCustomPlatformData::create(fontFaceData, d.itemInCollection))
return FontPlatformData(size, WTFMove(orientation), WTFMove(widthVariant), WTFMove(textRenderingMode), syntheticBold, syntheticOblique, WTFMove(fontCustomPlatformData));
return std::nullopt;
}
);
}
FontPlatformData::IPCData FontPlatformData::toIPCData() const
{
if (auto* data = creationData())
return FontPlatformSerializedCreationData { { data->fontFaceData->span() }, data->itemInCollection };
return FontPlatformSerializedData { m_font.getTypeface()->serialize() };
}
bool FontPlatformData::isFixedPitch() const
{
return m_font.getTypeface()->isFixedPitch();
}
unsigned FontPlatformData::hash() const
{
// FIXME: do we need to consider m_features for the hash?
return computeHash(m_font.getTypeface()->uniqueID(), m_widthVariant, m_isHashTableDeletedValue, m_textRenderingMode, m_orientation, m_syntheticBold, m_syntheticOblique);
}
bool FontPlatformData::platformIsEqual(const FontPlatformData& other) const
{
return SkTypeface::Equal(m_font.getTypeface(), other.skFont().getTypeface()) && m_features == other.m_features;
}
#if !LOG_DISABLED
String FontPlatformData::description() const
{
return String();
}
#endif
String FontPlatformData::familyName() const
{
if (auto* typeface = m_font.getTypeface()) {
SkString familyName;
typeface->getFamilyName(&familyName);
return String::fromUTF8(familyName.data());
}
return { };
}
static_assert(std::is_same<SkFontTableTag, OpenType::Tag>::value);
RefPtr<SharedBuffer> FontPlatformData::openTypeTable(uint32_t table) const
{
auto* typeface = m_font.getTypeface();
if (!typeface)
return nullptr;
OpenType::Tag tag = OT_MAKE_TAG(table >> 24, (table & 0xff0000) >> 16, (table & 0xff00) >> 8, (table & 0xff));
size_t tableSize = typeface->getTableSize(tag);
if (!tableSize)
return nullptr;
Vector<uint8_t> data(tableSize);
if (typeface->getTableData(tag, 0, tableSize, data.data()) != tableSize)
return nullptr;
return SharedBuffer::create(WTFMove(data));
}
FontPlatformData FontPlatformData::create(const Attributes& data, const FontCustomPlatformData* custom)
{
Vector<hb_feature_t> features = data.m_features;
if (custom) {
sk_sp<SkTypeface> typeface = custom->m_typeface;
return { WTFMove(typeface), data.m_size, data.m_syntheticBold, data.m_syntheticOblique, data.m_orientation, data.m_widthVariant, data.m_textRenderingMode, WTFMove(features), custom };
}
sk_sp<SkTypeface> typeface = FontCache::forCurrentThread().fontManager().matchFamilyStyle(data.m_familyName.c_str(), data.m_style);
return { WTFMove(typeface), data.m_size, data.m_syntheticBold, data.m_syntheticOblique, data.m_orientation, data.m_widthVariant, data.m_textRenderingMode, WTFMove(features) };
}
FontPlatformData::Attributes FontPlatformData::attributes() const
{
SkString familyName;
skFont().getTypeface()->getFamilyName(&familyName);
SkFontStyle style = skFont().getTypeface()->fontStyle();
Vector<hb_feature_t> features = m_features;
return { m_size, m_orientation, m_widthVariant, m_textRenderingMode, m_syntheticBold, m_syntheticOblique, familyName, style, WTFMove(features) };
}
hb_font_t* FontPlatformData::hbFont() const
{
return m_hbFont->scaledFont(*this);
}
#if ENABLE(MATHML)
HbUniquePtr<hb_font_t> FontPlatformData::createOpenTypeMathHarfBuzzFont() const
{
auto* face = hb_font_get_face(hbFont());
if (!hb_ot_math_has_data(face))
return nullptr;
return HbUniquePtr<hb_font_t>(hb_font_create(face));
}
#endif
void FontPlatformData::updateSize(float size)
{
m_size = size;
m_font.setSize(m_size);
}
Vector<FontPlatformData::FontVariationAxis> FontPlatformData::variationAxes(ShouldLocalizeAxisNames) const
{
auto* typeface = m_font.getTypeface();
if (!typeface)
return { };
return WTF::map(defaultFontVariationValues(*typeface), [](auto&& entry) {
auto& [tag, values] = entry;
return FontPlatformData::FontVariationAxis { values.axisName, String(tag), values.defaultValue, values.minimumValue, values.maximumValue };
});
}
} // namespace WebCore
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