SVGnumber MacOpSVGFont::GetGlyphAdvance(uni_char uc)
{
ATSGlyphIdealMetrics metrics[1];
GlyphID glyphs[1];
if(m_font)
{
GlyphID glyph = 0;
#ifdef USE_CG_SHOW_GLYPHS
glyph = ((MacOpFont*)m_font)->GetGlyphID((UniChar)uc);
#else
#if 0
if(!mGlyphInfoArray)
{
((MacOpFont*)m_font)->GetGlyphs(m_text, mGlyphInfoArray);
}
if(mGlyphInfoArray)
glyph = mGlyphInfoArray->glyphs[gnum].glyphID;
#endif
#endif
OSStatus err = noErr;
glyphs[0] = glyph;
err = ATSUGlyphGetIdealMetrics(((MacOpFont*)m_font)->GetATSUStyle(1.0), 1, glyphs, 0, metrics);
if(err == noErr)
{
return metrics[0].advance.x;
}
}
return 0;
}
static cairo_status_t
_cairo_atsui_font_glyph_extents(void *abstract_font,
cairo_glyph_t * glyphs,
int num_glyphs,
cairo_text_extents_t * extents)
{
cairo_atsui_font_t *font = abstract_font;
OSStatus err;
assert(num_glyphs == 1);
GlyphID theGlyph = glyphs[0].index;
ATSGlyphIdealMetrics metricsH, metricsV;
ATSUStyle style;
ATSUCreateAndCopyStyle(font->unscaled_style, &style);
err = ATSUGlyphGetIdealMetrics(style,
1, &theGlyph, 0, &metricsH);
ATSUVerticalCharacterType verticalType = kATSUStronglyVertical;
const ATSUAttributeTag theTag[] = { kATSUVerticalCharacterTag };
const ByteCount theSizes[] = { sizeof(verticalType) };
ATSUAttributeValuePtr theValues[] = { &verticalType };
err = ATSUSetAttributes(style, 1, theTag, theSizes, theValues);
err = ATSUGlyphGetIdealMetrics(style,
1, &theGlyph, 0, &metricsV);
extents->x_bearing = metricsH.sideBearing.x;
extents->y_bearing = metricsV.advance.y;
extents->width =
metricsH.advance.x - metricsH.sideBearing.x - metricsH.otherSideBearing.x;
extents->height =
-metricsV.advance.y - metricsV.sideBearing.y - metricsV.otherSideBearing.y;
extents->x_advance = metricsH.advance.x;
extents->y_advance = 0;
ATSUDisposeStyle(style);
return CAIRO_STATUS_SUCCESS;
}
float GetGlyphWidth_AAT(ATSUStyle style, UInt16 gid)
/* returns TeX points */
{
ATSGlyphIdealMetrics metrics;
OSStatus status = ATSUGlyphGetIdealMetrics(style, 1, &gid, 0, &metrics);
if (status == noErr)
return PStoTeXPoints(metrics.advance.x);
else
return 0;
}
float GetGlyphItalCorr_AAT(ATSUStyle style, UInt16 gid)
{
float rval = 0.0;
ATSGlyphIdealMetrics metrics;
OSStatus status = ATSUGlyphGetIdealMetrics(style, 1, &gid, 0, &metrics);
if (status == noErr) {
GlyphBBox bbox;
GetGlyphBBox_AAT(style, gid, &bbox);
if (bbox.xMax > PStoTeXPoints(metrics.advance.x))
rval = bbox.xMax - PStoTeXPoints(metrics.advance.x);
}
return rval;
}
void GetGlyphSidebearings_AAT(ATSUStyle style, UInt16 gid, float* lsb, float* rsb)
/* returns TeX points */
{
ATSGlyphIdealMetrics metrics;
OSStatus status = ATSUGlyphGetIdealMetrics(style, 1, &gid, 0, &metrics);
if (status == noErr) {
GlyphBBox bbox;
GetGlyphBBox_AAT(style, gid, &bbox);
*lsb = bbox.xMin;
*rsb = PStoTeXPoints(metrics.advance.x) - bbox.xMax;
}
else {
*lsb = *rsb = 0;
}
}
