SimpleFontDataQt.cpp [plain text]
#include "config.h"
#include "SimpleFontData.h"
#include "NotImplemented.h"
namespace WebCore {
void SimpleFontData::determinePitch()
{
notImplemented();
m_treatAsFixedPitch = false;
}
bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
{
QRawFont rawFont(m_platformData.rawFont());
for (int i = 0; i < length; ++i) {
if (!rawFont.supportsCharacter(static_cast<QChar>(characters[i])))
return false;
}
return true;
}
float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
{
if (!glyph || !platformData().size())
return 0;
QVector<quint32> glyphIndexes;
glyphIndexes.append(glyph);
QVector<QPointF> advances = platformData().rawFont().advancesForGlyphIndexes(glyphIndexes);
ASSERT(!advances.isEmpty());
return advances.at(0).x();
}
PassRefPtr<SimpleFontData> SimpleFontData::platformCreateScaledFontData(const FontDescription& fontDescription, float scaleFactor) const
{
const float scaledSize = lroundf(fontDescription.computedSize() * scaleFactor);
return SimpleFontData::create(FontPlatformData(m_platformData, scaledSize), isCustomFont(), false);
}
FloatRect SimpleFontData::platformBoundsForGlyph(Glyph glyph) const
{
return m_platformData.rawFont().boundingRect(glyph);
}
void SimpleFontData::platformInit()
{
if (!m_platformData.size()) {
m_fontMetrics.reset();
m_avgCharWidth = 0;
m_maxCharWidth = 0;
return;
}
QRawFont rawFont(m_platformData.rawFont());
float descent = rawFont.descent();
float ascent = rawFont.ascent();
float xHeight = rawFont.xHeight();
float lineSpacing = ascent + descent + rawFont.leading();
QVector<quint32> indexes = rawFont.glyphIndexesForString(QLatin1String(" "));
QVector<QPointF> advances = rawFont.advancesForGlyphIndexes(indexes);
float spaceWidth = advances.at(0).x();
indexes = rawFont.glyphIndexesForString(QLatin1String("0"));
advances = rawFont.advancesForGlyphIndexes(indexes);
float zeroWidth = advances.at(0).x();
if (lineSpacing < ascent + descent)
lineSpacing = ascent + descent;
float lineGap = lineSpacing - ascent - descent;
m_fontMetrics.setAscent(ascent);
m_fontMetrics.setDescent(qAbs(descent));
m_fontMetrics.setLineSpacing(lineSpacing);
m_fontMetrics.setXHeight(xHeight);
m_fontMetrics.setLineGap(lineGap);
m_fontMetrics.setZeroWidth(zeroWidth);
m_spaceWidth = spaceWidth;
}
void SimpleFontData::platformCharWidthInit()
{
if (!m_platformData.size())
return;
QRawFont rawFont(m_platformData.rawFont());
m_avgCharWidth = rawFont.averageCharWidth();
m_maxCharWidth = rawFont.maxCharWidth();
}
void SimpleFontData::platformDestroy()
{
}
}