SimpleFontData::SimpleFontData(const FontPlatformData& f, bool customFont, bool loading, SVGFontData* svgFontData)
    : m_maxCharWidth(-1)
    , m_avgCharWidth(-1)
    , m_unitsPerEm(defaultUnitsPerEm)
    , m_platformData(f)
    , m_treatAsFixedPitch(false)
#if ENABLE(SVG_FONTS)
    , m_svgFontData(svgFontData)
#endif
    , m_isCustomFont(customFont)
    , m_isLoading(loading)
    , m_smallCapsFontData(0)
#if (PLATFORM(WKC))
    , m_lineSpacing(0)
#endif
{
#if !ENABLE(SVG_FONTS)
    UNUSED_PARAM(svgFontData);
#else
    if (SVGFontFaceElement* svgFontFaceElement = svgFontData ? svgFontData->svgFontFaceElement() : 0) {
        m_unitsPerEm = svgFontFaceElement->unitsPerEm();

        double scale = f.size();
        if (m_unitsPerEm)
            scale /= m_unitsPerEm;

        m_ascent = static_cast<int>(svgFontFaceElement->ascent() * scale);
        m_descent = static_cast<int>(svgFontFaceElement->descent() * scale);
        m_xHeight = static_cast<int>(svgFontFaceElement->xHeight() * scale);
        m_lineGap = 0.1f * f.size();
        m_lineSpacing = m_ascent + m_descent + m_lineGap;

        SVGFontElement* associatedFontElement = svgFontFaceElement->associatedFontElement();

        Vector<SVGGlyphIdentifier> spaceGlyphs;
        associatedFontElement->getGlyphIdentifiersForString(String(" ", 1), spaceGlyphs);
        m_spaceWidth = spaceGlyphs.isEmpty() ? m_xHeight : static_cast<float>(spaceGlyphs.first().horizontalAdvanceX * scale);

        Vector<SVGGlyphIdentifier> numeralZeroGlyphs;
        associatedFontElement->getGlyphIdentifiersForString(String("0", 1), numeralZeroGlyphs);
        m_avgCharWidth = numeralZeroGlyphs.isEmpty() ? m_spaceWidth : static_cast<float>(numeralZeroGlyphs.first().horizontalAdvanceX * scale);

        Vector<SVGGlyphIdentifier> letterWGlyphs;
        associatedFontElement->getGlyphIdentifiersForString(String("W", 1), letterWGlyphs);
        m_maxCharWidth = letterWGlyphs.isEmpty() ? m_ascent : static_cast<float>(letterWGlyphs.first().horizontalAdvanceX * scale);

        // FIXME: is there a way we can get the space glyph from the SVGGlyphIdentifier above?
        m_spaceGlyph = 0;
        determinePitch();
        m_adjustedSpaceWidth = roundf(m_spaceWidth);
        m_missingGlyphData.fontData = this;
        m_missingGlyphData.glyph = 0;
        return;
    }
#endif

    platformInit();
    platformGlyphInit();
    platformCharWidthInit();
}
SimpleFontData::SimpleFontData(PassOwnPtr<SVGFontData> svgFontData, int size, bool syntheticBold, bool syntheticItalic)
    : m_platformData(FontPlatformData(size, syntheticBold, syntheticItalic))
    , m_treatAsFixedPitch(false)
    , m_svgFontData(svgFontData)
    , m_isCustomFont(true)
    , m_isLoading(false)
    , m_isTextOrientationFallback(false)
    , m_isBrokenIdeographFallback(false)
    , m_hasVerticalGlyphs(false)
{
    SVGFontFaceElement* svgFontFaceElement = m_svgFontData->svgFontFaceElement();
    unsigned unitsPerEm = svgFontFaceElement->unitsPerEm();

    float scale = size;
    if (unitsPerEm)
        scale /= unitsPerEm;

    float xHeight = svgFontFaceElement->xHeight() * scale;
    float ascent = svgFontFaceElement->ascent() * scale;
    float descent = svgFontFaceElement->descent() * scale;
    float lineGap = 0.1f * size;

    SVGFontElement* associatedFontElement = svgFontFaceElement->associatedFontElement();
    if (!xHeight) {    
        // Fallback if x_heightAttr is not specified for the font element.
        Vector<SVGGlyphIdentifier> letterXGlyphs;
        associatedFontElement->getGlyphIdentifiersForString(String("x", 1), letterXGlyphs);
        xHeight = letterXGlyphs.isEmpty() ? 2 * ascent / 3 : letterXGlyphs.first().horizontalAdvanceX * scale;
    }

    m_fontMetrics.setUnitsPerEm(unitsPerEm);
    m_fontMetrics.setAscent(ascent);
    m_fontMetrics.setDescent(descent);
    m_fontMetrics.setLineGap(lineGap);
    m_fontMetrics.setLineSpacing(roundf(ascent) + roundf(descent) + roundf(lineGap));
    m_fontMetrics.setXHeight(xHeight);

    Vector<SVGGlyphIdentifier> spaceGlyphs;
    associatedFontElement->getGlyphIdentifiersForString(String(" ", 1), spaceGlyphs);
    m_spaceWidth = spaceGlyphs.isEmpty() ? xHeight : spaceGlyphs.first().horizontalAdvanceX * scale;

    Vector<SVGGlyphIdentifier> numeralZeroGlyphs;
    associatedFontElement->getGlyphIdentifiersForString(String("0", 1), numeralZeroGlyphs);
    m_avgCharWidth = numeralZeroGlyphs.isEmpty() ? m_spaceWidth : numeralZeroGlyphs.first().horizontalAdvanceX * scale;

    Vector<SVGGlyphIdentifier> letterWGlyphs;
    associatedFontElement->getGlyphIdentifiersForString(String("W", 1), letterWGlyphs);
    m_maxCharWidth = letterWGlyphs.isEmpty() ? ascent : letterWGlyphs.first().horizontalAdvanceX * scale;

    // FIXME: is there a way we can get the space glyph from the SVGGlyphIdentifier above?
    m_spaceGlyph = 0;
    m_zeroWidthSpaceGlyph = 0;
    determinePitch();
    m_missingGlyphData.fontData = this;
    m_missingGlyphData.glyph = 0;
}
예제 #3
0
SimpleFontData::SimpleFontData(PassOwnPtr<SVGFontData> svgFontData, int size, bool syntheticBold, bool syntheticItalic)
    : m_orientation(Horizontal)
    , m_platformData(FontPlatformData(size, syntheticBold, syntheticItalic))
    , m_treatAsFixedPitch(false)
    , m_svgFontData(svgFontData)
    , m_isCustomFont(true)
    , m_isLoading(false)
    , m_isBrokenIdeographFont(false)
{
    SVGFontFaceElement* svgFontFaceElement = m_svgFontData->svgFontFaceElement();
    m_unitsPerEm = svgFontFaceElement->unitsPerEm();

    double scale = size;
    if (m_unitsPerEm)
        scale /= m_unitsPerEm;

    m_ascent = static_cast<int>(svgFontFaceElement->ascent() * scale);
    m_descent = static_cast<int>(svgFontFaceElement->descent() * scale);
    m_xHeight = static_cast<int>(svgFontFaceElement->xHeight() * scale);
    m_lineGap = 0.1f * size;
    m_lineSpacing = m_ascent + m_descent + m_lineGap;

    SVGFontElement* associatedFontElement = svgFontFaceElement->associatedFontElement();

    Vector<SVGGlyphIdentifier> spaceGlyphs;
    associatedFontElement->getGlyphIdentifiersForString(String(" ", 1), spaceGlyphs);
    m_spaceWidth = spaceGlyphs.isEmpty() ? m_xHeight : static_cast<float>(spaceGlyphs.first().horizontalAdvanceX * scale);

    Vector<SVGGlyphIdentifier> numeralZeroGlyphs;
    associatedFontElement->getGlyphIdentifiersForString(String("0", 1), numeralZeroGlyphs);
    m_avgCharWidth = numeralZeroGlyphs.isEmpty() ? m_spaceWidth : static_cast<float>(numeralZeroGlyphs.first().horizontalAdvanceX * scale);

    Vector<SVGGlyphIdentifier> letterWGlyphs;
    associatedFontElement->getGlyphIdentifiersForString(String("W", 1), letterWGlyphs);
    m_maxCharWidth = letterWGlyphs.isEmpty() ? m_ascent : static_cast<float>(letterWGlyphs.first().horizontalAdvanceX * scale);

    // FIXME: is there a way we can get the space glyph from the SVGGlyphIdentifier above?
    m_spaceGlyph = 0;
    m_zeroWidthSpaceGlyph = 0;
    determinePitch();
    m_adjustedSpaceWidth = roundf(m_spaceWidth);
    m_missingGlyphData.fontData = this;
    m_missingGlyphData.glyph = 0;
}