glyph_metrics_t QFontEngineDirectWrite::boundingBox(glyph_t g)
{
if (m_directWriteFontFace == 0)
return glyph_metrics_t();
UINT16 glyphIndex = g;
DWRITE_GLYPH_METRICS glyphMetrics;
HRESULT hr = m_directWriteFontFace->GetDesignGlyphMetrics(&glyphIndex, 1, &glyphMetrics);
if (SUCCEEDED(hr)) {
QFixed advanceWidth = DESIGN_TO_LOGICAL(glyphMetrics.advanceWidth);
QFixed leftSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.leftSideBearing);
QFixed rightSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.rightSideBearing);
QFixed advanceHeight = DESIGN_TO_LOGICAL(glyphMetrics.advanceHeight);
QFixed verticalOriginY = DESIGN_TO_LOGICAL(glyphMetrics.verticalOriginY);
if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) {
advanceWidth = advanceWidth.round();
advanceHeight = advanceHeight.round();
}
QFixed width = advanceWidth - leftSideBearing - rightSideBearing;
return glyph_metrics_t(-leftSideBearing, -verticalOriginY,
width, m_ascent + m_descent,
advanceWidth, advanceHeight);
} else {
qErrnoWarning("QFontEngineDirectWrite::boundingBox: GetDesignGlyphMetrics failed");
}
return glyph_metrics_t();
}
void QFontEngineDirectWrite::collectMetrics()
{
if (m_directWriteFontFace != 0) {
DWRITE_FONT_METRICS metrics;
m_directWriteFontFace->GetMetrics(&metrics);
m_unitsPerEm = metrics.designUnitsPerEm;
m_lineThickness = DESIGN_TO_LOGICAL(metrics.underlineThickness);
m_ascent = DESIGN_TO_LOGICAL(metrics.ascent);
m_descent = DESIGN_TO_LOGICAL(metrics.descent);
m_xHeight = DESIGN_TO_LOGICAL(metrics.xHeight);
m_lineGap = DESIGN_TO_LOGICAL(metrics.lineGap);
}
}
void QFontEngineDirectWrite::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const
{
if (m_directWriteFontFace == 0)
return;
QVarLengthArray<UINT16> glyphIndices(glyphs->numGlyphs);
// ### Caching?
for(int i=0; i<glyphs->numGlyphs; i++)
glyphIndices[i] = UINT16(glyphs->glyphs[i]);
QVarLengthArray<DWRITE_GLYPH_METRICS> glyphMetrics(glyphIndices.size());
HRESULT hr = m_directWriteFontFace->GetDesignGlyphMetrics(glyphIndices.data(),
glyphIndices.size(),
glyphMetrics.data());
if (SUCCEEDED(hr)) {
for (int i=0; i<glyphs->numGlyphs; ++i) {
glyphs->advances_x[i] = DESIGN_TO_LOGICAL(glyphMetrics[i].advanceWidth);
if (fontDef.styleStrategy & QFont::ForceIntegerMetrics)
glyphs->advances_x[i] = glyphs->advances_x[i].round();
glyphs->advances_y[i] = 0;
}
} else {
qErrnoWarning("QFontEngineDirectWrite::recalcAdvances: GetDesignGlyphMetrics failed");
}
}
glyph_metrics_t QWindowsFontEngineDirectWrite::boundingBox(glyph_t g)
{
UINT16 glyphIndex = g;
DWRITE_GLYPH_METRICS glyphMetrics;
HRESULT hr = m_directWriteFontFace->GetDesignGlyphMetrics(&glyphIndex, 1, &glyphMetrics);
if (SUCCEEDED(hr)) {
QFixed advanceWidth = DESIGN_TO_LOGICAL(glyphMetrics.advanceWidth);
QFixed leftSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.leftSideBearing);
QFixed rightSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.rightSideBearing);
QFixed advanceHeight = DESIGN_TO_LOGICAL(glyphMetrics.advanceHeight);
QFixed verticalOriginY = DESIGN_TO_LOGICAL(glyphMetrics.verticalOriginY);
QFixed topSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.topSideBearing);
QFixed bottomSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.bottomSideBearing);
if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) {
advanceWidth = advanceWidth.round();
advanceHeight = advanceHeight.round();
}
QFixed width = advanceWidth - leftSideBearing - rightSideBearing;
QFixed height = advanceHeight - topSideBearing - bottomSideBearing;
return glyph_metrics_t(leftSideBearing,
-verticalOriginY + topSideBearing,
width,
height,
advanceWidth,
advanceHeight);
} else {
qErrnoWarning("%s: GetDesignGlyphMetrics failed", __FUNCTION__);
}
return glyph_metrics_t();
}
