PassOwnPtr<SimpleFontData> SimpleFontData::createScaledFontData(const FontDescription& fontDescription, float scaleFactor) const
{
FontDescription desc = FontDescription(fontDescription);
desc.setSpecifiedSize(scaleFactor * fontDescription.computedSize());
FontPlatformData fontPlatformData(desc, desc.family().family());
return adoptPtr(new SimpleFontData(fontPlatformData, isCustomFont(), false));
}
FontPlatformData FontCustomPlatformData::fontPlatformData(const FontDescription& fontDescription, bool bold, bool italic)
{
int size = fontDescription.computedPixelSize();
FontRenderingMode renderingMode = fontDescription.renderingMode();
LOGFONT logFont;
memset(&logFont, 0, sizeof(LOGFONT));
wcsncpy(logFont.lfFaceName, m_name.charactersWithNullTermination().data(), LF_FACESIZE - 1);
logFont.lfHeight = -size;
if (renderingMode == FontRenderingMode::Normal)
logFont.lfHeight *= 32;
logFont.lfWidth = 0;
logFont.lfEscapement = 0;
logFont.lfOrientation = 0;
logFont.lfUnderline = false;
logFont.lfStrikeOut = false;
logFont.lfCharSet = DEFAULT_CHARSET;
logFont.lfOutPrecision = OUT_TT_ONLY_PRECIS;
logFont.lfQuality = CLEARTYPE_QUALITY;
logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
logFont.lfItalic = italic;
logFont.lfWeight = bold ? 700 : 400;
auto hfont = adoptGDIObject(::CreateFontIndirect(&logFont));
cairo_font_face_t* fontFace = cairo_win32_font_face_create_for_hfont(hfont.get());
FontPlatformData fontPlatformData(WTFMove(hfont), fontFace, size, bold, italic);
cairo_font_face_destroy(fontFace);
return fontPlatformData;
}
RefPtr<Font> CSSFontFaceSource::font(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return nullptr;
if (!m_font
#if ENABLE(SVG_FONTS)
&& !m_svgFontFaceElement
#endif
) {
// We're local. Just return a Font from the normal cache.
// We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
return FontCache::singleton().fontForFamily(fontDescription, m_string, true);
}
if (!m_font || m_font->isLoaded()) {
if (m_font) {
if (!m_font->ensureCustomFontData(m_string))
return nullptr;
return m_font->createFont(fontDescription, m_string, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings);
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement) {
#if ENABLE(SVG_OTF_CONVERTER)
if (!m_svgFontFaceElement->parentNode() || !is<SVGFontElement>(m_svgFontFaceElement->parentNode()))
return nullptr;
SVGFontElement& fontElement = downcast<SVGFontElement>(*m_svgFontFaceElement->parentNode());
// FIXME: Re-run this when script modifies the element or any of its descendents
// FIXME: We might have already converted this font. Make existing conversions discoverable.
if (auto otfFont = convertSVGToOTFFont(fontElement))
m_generatedOTFBuffer = SharedBuffer::adoptVector(otfFont.value());
if (!m_generatedOTFBuffer)
return nullptr;
auto customPlatformData = createFontCustomPlatformData(*m_generatedOTFBuffer);
if (!customPlatformData)
return nullptr;
return Font::create(customPlatformData->fontPlatformData(fontDescription, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings), true, false);
#else
return Font::create(std::make_unique<SVGFontData>(m_svgFontFaceElement.get()), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic);
#endif
}
#endif
return nullptr;
}
} else {
// Kick off the load. Do it soon rather than now, because we may be in the middle of layout,
// and the loader may invoke arbitrary delegate or event handler code.
fontSelector->beginLoadingFontSoon(m_font.get());
return Font::create(FontCache::singleton().lastResortFallbackFont(fontDescription)->platformData(), true, true);
}
}
const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* chars, int length)
{
// The comments below are valid but we still need to support fallback fonts for sites out of our control (like a payment site for example).
// So we need to send down a sample glyph with the fontDescription and prefered family name so that EAText can find an alternate font.
// For example, several sites just use Times New Roman expecting that it will include Chinese fonts but our Time New Roman does not have it so
// it drops back in here as a last resort.
// Ideally, it would be great if we could pass down a sample glyph to EAText when we first get a font instead of just machting the family name/description.
// Seems that other text implementations might be able to automatically replace a missing glyph with another font so they just return NULL here.
// It may be better to have a leak free implementation here. See the commented out code below as example however that implementation does not pass
// down a sample char so it is unable to confirm that the glyph is actually supported by the font.
const FontDescription& fontDescription(font.fontDescription());
const AtomicString& fontFamily(font.family().family());
FontPlatformData fontPlatformData(fontDescription, fontFamily, chars, length);
return new SimpleFontData(fontPlatformData);
/*
// Note by Arpit Baldeva:
// This method is called when WebCore can not find the glyphs for the characters in the loaded font. This method is intended
// to serve as a "fallback to available fonts in the system". Since we never want to load fonts ourselves(the application is
// supposed to preload the fonts it needs), we simply return 0 here.
#if 1
return 0;
#else
// In case, we need to implement this functionality, the leak free implementation is as follows. Following makes sure that the
// created font ends up in a list that is freed at the Shutdown.
const FontDescription& fontDescription(font.fontDescription());
const AtomicString& fontFamily(font.family().family());
FontPlatformData* platformData = getCachedFontPlatformData(font.fontDescription(), fontFamily, false);
SimpleFontData* fontData = getCachedFontData(platformData);
// ASSERT(fontData->containsCharacters(characters, length));
return fontData;
#endif
*/
}
RefPtr<Font> CSSFontFaceSource::font(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return nullptr;
if (!m_font
#if ENABLE(SVG_FONTS)
&& !m_svgFontFaceElement
#endif
) {
// We're local. Just return a Font from the normal cache.
// We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
return FontCache::singleton().fontForFamily(fontDescription, m_string, true);
}
unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 5 | fontDescription.widthVariant() << 3
| (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);
RefPtr<Font> font = m_fontTable.add(hashKey, nullptr).iterator->value;
if (font)
return font.release();
// If we are still loading, then we let the system pick a font.
if (isLoaded()) {
if (m_font) {
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
bool hasExternalSVGFont = false;
#if ENABLE(SVG_FONTS)
hasExternalSVGFont = m_hasExternalSVGFont;
#endif
if (!m_font->ensureCustomFontData(hasExternalSVGFont, m_string))
return nullptr;
font = m_font->createFont(fontDescription, m_string, syntheticBold, syntheticItalic, hasExternalSVGFont);
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement) {
#if ENABLE(SVG_OTF_CONVERTER)
if (!m_svgFontFaceElement->parentNode() || !is<SVGFontElement>(m_svgFontFaceElement->parentNode()))
return nullptr;
SVGFontElement& fontElement = downcast<SVGFontElement>(*m_svgFontFaceElement->parentNode());
// FIXME: Re-run this when script modifies the element or any of its descendents
// FIXME: We might have already converted this font. Make existing conversions discoverable.
Vector<char> otfFont = convertSVGToOTFFont(fontElement);
m_generatedOTFBuffer = SharedBuffer::adoptVector(otfFont);
if (!m_generatedOTFBuffer)
return nullptr;
auto customPlatformData = createFontCustomPlatformData(*m_generatedOTFBuffer);
if (!customPlatformData)
return nullptr;
font = Font::create(customPlatformData->fontPlatformData(fontDescription, syntheticBold, syntheticItalic), true, false);
#else
font = Font::create(std::make_unique<SVGFontData>(m_svgFontFaceElement.get()), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic);
#endif
}
#endif
}
} else {
// Kick off the load. Do it soon rather than now, because we may be in the middle of layout,
// and the loader may invoke arbitrary delegate or event handler code.
fontSelector->beginLoadingFontSoon(m_font.get());
Ref<Font> placeholderFont = FontCache::singleton().lastResortFallbackFont(fontDescription);
Ref<Font> placeholderFontCopyInLoadingState = Font::create(placeholderFont->platformData(), true, true);
return WTF::move(placeholderFontCopyInLoadingState);
}
return font.release();
}
