C++ FontDescription::renderingMode方法代码示例

FontPlatformData FontCustomPlatformData::fontPlatformData(const FontDescription& fontDescription, bool bold, bool italic)
{
    int size = fontDescription.computedPixelSize();
    FontRenderingMode renderingMode = fontDescription.renderingMode();

    ASSERT(m_fontReference);

    LOGFONT& logFont = *static_cast<LOGFONT*>(malloc(sizeof(LOGFONT)));
    memcpy(logFont.lfFaceName, m_name.charactersWithNullTermination().data(), sizeof(logFont.lfFaceName[0]) * std::min<size_t>(static_cast<size_t>(LF_FACESIZE), 1 + m_name.length()));

    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));

    RetainPtr<CGFontRef> cgFont = adoptCF(CGFontCreateWithPlatformFont(&logFont));
    return FontPlatformData(WTFMove(hfont), cgFont.get(), size, bold, italic, renderingMode == FontRenderingMode::Alternate);
}

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;
}

PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(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 0;

    if (!m_font
#if ENABLE(SVG_FONTS)
            && !m_svgFontFaceElement
#endif
    ) {
        // We're local. Just return a SimpleFontData from the normal cache.
        // We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
        return fontCache()->getCachedFontData(fontDescription, m_string, true);
    }

    // See if we have a mapping in our FontData cache.
    unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 5 | fontDescription.widthVariant() << 3
                       | (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);

    RefPtr<SimpleFontData>& fontData = m_fontDataTable.add(hashKey, 0).iterator->value;
    if (fontData)
        return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.

    // If we are still loading, then we let the system pick a font.
    if (isLoaded()) {
        if (m_font) {
#if ENABLE(SVG_FONTS)
            if (m_hasExternalSVGFont) {
                // For SVG fonts parse the external SVG document, and extract the <font> element.
                if (!m_font->ensureSVGFontData())
                    return 0;

                if (!m_externalSVGFontElement) {
                    String fragmentIdentifier;
                    size_t start = m_string.find('#');
                    if (start != notFound)
                        fragmentIdentifier = m_string.string().substring(start + 1);
                    m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier);
                }

                if (!m_externalSVGFontElement)
                    return 0;

                if (auto fontFaceElement = Traversal<SVGFontFaceElement>::firstChild(m_externalSVGFontElement.get())) {
                    if (!m_svgFontFaceElement) {
                        // We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
                        // Use the imported <font-face> tag as referencing font-face element for these cases.
                        m_svgFontFaceElement = fontFaceElement;
                    }

                    fontData = SimpleFontData::create(SVGFontData::create(fontFaceElement), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic);
                }
            } else
#endif
            {
                // Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
                if (!m_font->ensureCustomFontData())
                    return 0;

                fontData = SimpleFontData::create(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic,
                    fontDescription.orientation(), fontDescription.widthVariant(), fontDescription.renderingMode()), true, false);
            }
        } else {
#if ENABLE(SVG_FONTS)
            // In-Document SVG Fonts
            if (m_svgFontFaceElement)
                fontData = SimpleFontData::create(SVGFontData::create(m_svgFontFaceElement.get()), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic);
#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());

        // This temporary font is not retained and should not be returned.
        FontCachePurgePreventer fontCachePurgePreventer;
        SimpleFontData* temporaryFont = fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
        fontData = SimpleFontData::create(temporaryFont->platformData(), true, true);
    }

    return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
}