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");
}
}
void
fontMetrics(FontPtr font,
int *max_awidth_return,
int *min_x_return, int *min_y_return,
int *max_x_return, int *max_y_return)
{
int i, rc;
int max_awidth = 0;
int min_x = 10000 << 16, min_y = 10000 << 16;
int max_x = -10000 << 16, max_y = -10000 << 16;
for(i = 0; i < FONT_CODES; i++) {
int awidth, x0, y0, x1, y1;
rc = glyphMetrics(font, i, &awidth, &x0, &y0, &x1, &y1);
if(rc < 0)
continue;
if(awidth > max_awidth)
max_awidth = awidth;
if(x0 < min_x) min_x = x0;
if(y0 < min_y) min_y = y0;
if(x1 > max_x) max_x = x1;
if(y1 > max_y) max_y = y1;
}
if(max_awidth_return) *max_awidth_return = max_awidth;
if(min_x_return) *min_x_return = min_x;
if(min_y_return) *min_y_return = min_y;
if(max_x_return) *max_x_return = max_x;
if(max_y_return) *max_y_return = max_y;
}
