void TTFRenderer::getFaceMetrics(int &advance, int &yOffset, int &xMin) const {
FT_Glyph_Metrics &metrics = _face->glyph->metrics;
xMin = ftFloor26_6(metrics.horiBearingX);
yOffset = _ascent - ftFloor26_6(metrics.horiBearingY);
advance = ftCeil26_6(metrics.horiAdvance);
}
bool TrueTypeFont::renderGlyph(uint32 unicode, Glyph &glyph) {
uint32 index = FT_Get_Char_Index(_sjisFont, unicode);
if (!index)
return false;
FT_Error err = FT_Load_Glyph(_sjisFont, index, FT_LOAD_MONOCHROME | FT_LOAD_NO_HINTING);
if (err)
return false;
err = FT_Render_Glyph(_sjisFont->glyph, FT_RENDER_MODE_MONO);
if (err)
return false;
FT_Glyph_Metrics &metrics = _sjisFont->glyph->metrics;
glyph.xOffset = ftFloor26_6(metrics.horiBearingX);
glyph.yOffset = _ascent - ftFloor26_6(metrics.horiBearingY);
// In case we got a negative xMin we adjust that, this might make some
// characters give a odd layout though.
if (glyph.xOffset < 0)
glyph.xOffset = 0;
const FT_Bitmap &bitmap = _sjisFont->glyph->bitmap;
glyph.height = bitmap.rows;
glyph.width = bitmap.width;
glyph.pitch = bitmap.pitch;
glyph.plainData = 0;
// We only accept monochrome characters.
if (bitmap.pixel_mode != FT_PIXEL_MODE_MONO)
return false;
if (glyph.height) {
glyph.plainData = new uint8[glyph.height * abs(glyph.pitch)];
if (!glyph.plainData)
return false;
const uint8 *src = bitmap.buffer;
uint8 *dst = glyph.plainData;
if (glyph.pitch < 0)
dst += (glyph.height - 1) * (-glyph.pitch);
for (int i = 0; i < bitmap.rows; ++i) {
memcpy(dst, src, abs(glyph.pitch));
src += bitmap.pitch;
dst += glyph.pitch;
}
}
glyph.pitch = abs(glyph.pitch);
return true;
}
void TTFRenderer::getFaceMetrics(int &advance, int &yOffset, int &xMin) const {
FT_Glyph_Metrics &metrics = _face->glyph->metrics;
xMin = ftFloor26_6(metrics.horiBearingX);
int xMax = xMin + ftCeil26_6(metrics.width);
yOffset = _ascent - ftFloor26_6(metrics.horiBearingY);
advance = ftCeil26_6(metrics.horiAdvance);
// In case we got a negative xMin we adjust that, this might make some
// characters look a bit odd, but it's the only way we can ensure no
// invalid memory gets written to with the current font API
if (xMin < 0) {
xMax -= xMin;
xMin = 0;
if (xMax > advance)
advance = xMax;
}
}
