C++ (Cpp) FontDescription::hasSizeAdjust Examples

Example #1

File: FontBuilder.cpp Project: alexanderbill/blink-crosswalk

void FontBuilder::updateAdjustedSize(FontDescription& fontDescription, const ComputedStyle& style, FontSelector* fontSelector)
{
    const float specifiedSize = fontDescription.specifiedSize();
    if (!fontDescription.hasSizeAdjust() || !specifiedSize)
        return;

    // We need to create a temporal Font to get xHeight of a primary font.
    // The aspect value is based on the xHeight of the font for the computed font size,
    // so we need to reset the adjustedSize to computedSize. See FontDescription::effectiveFontSize.
    fontDescription.setAdjustedSize(fontDescription.computedSize());

    Font font(fontDescription);
    font.update(fontSelector);
    if (!font.fontMetrics().hasXHeight())
        return;

    const float sizeAdjust = fontDescription.sizeAdjust();
    float aspectValue = font.fontMetrics().xHeight() / specifiedSize;
    float adjustedSize = (sizeAdjust / aspectValue) * specifiedSize;
    adjustedSize = getComputedSizeFromSpecifiedSize(fontDescription, style.effectiveZoom(), adjustedSize);

    float multiplier = style.textAutosizingMultiplier();
    if (multiplier > 1)
        adjustedSize = TextAutosizer::computeAutosizedFontSize(adjustedSize, multiplier);
    fontDescription.setAdjustedSize(adjustedSize);
}