OVG 1.1 Specification says that for vgDrawGlyph and vgDrawGlyphs if paintmode is equal to 0 says it will be useful to determine the metrics of the glyph sequence. But conditions that throw errors in these functions, one is paintMode being 0. So, what's the behavior I really should expect from printing with paintMode 0? Does the function will really do something even if it is in error condition?