/** Get the outline of a character given the glyph id */
protected synchronized GeneralPath getOutline(int glyphId, float width) {
// find the glyph itself
GlyfTable glyf = (GlyfTable) this.font.getTable("glyf");
Glyf g = glyf.getGlyph(glyphId);
GeneralPath gp = null;
if (g instanceof GlyfSimple) {
gp = renderSimpleGlyph((GlyfSimple) g);
} else if (g instanceof GlyfCompound) {
gp = renderCompoundGlyph(glyf, (GlyfCompound) g);
} else {
gp = new GeneralPath();
}
// calculate the advance
HmtxTable hmtx = (HmtxTable) this.font.getTable("hmtx");
float advance = hmtx.getAdvance(glyphId) / this.unitsPerEm;
// scale the glyph to match the desired advance
float widthfactor = width / advance;
// the base transform scales the glyph to 1x1
AffineTransform at = AffineTransform.getScaleInstance(1 / this.unitsPerEm, 1 / this.unitsPerEm);
at.concatenate(AffineTransform.getScaleInstance(widthfactor, 1));
gp.transform(at);
return gp;
}
/** Render a compound glyf */
protected GeneralPath renderCompoundGlyph(GlyfTable glyf, GlyfCompound g) {
GeneralPath gp = new GeneralPath();
for (int i = 0; i < g.getNumComponents(); i++) {
// find and render the component glyf
Glyf gl = glyf.getGlyph(g.getGlyphIndex(i));
GeneralPath path = null;
if (gl instanceof GlyfSimple) {
path = renderSimpleGlyph((GlyfSimple) gl);
} else if (gl instanceof GlyfCompound) {
path = renderCompoundGlyph(glyf, (GlyfCompound) gl);
} else {
throw new RuntimeException("Unsupported glyph type " + gl.getClass().getCanonicalName());
}
// multiply the translations by units per em
double[] matrix = g.getTransform(i);
// transform the path
path.transform(new AffineTransform(matrix));
// add it to the global path
gp.append(path, false);
}
return gp;
}
