- From: Nikolai Grigoriev <grigoriev@comtv.ru>
- Date: Fri, 10 Jun 2005 01:03:56 +0400
- To: <www-svg@w3.org>
Dear SVG editors, I am building a MathML-to-SVG renderer, and want to add support for SVG fonts. To do this, I need to access font metrics: in particular, I need bounding box data for individual glyphs. It is easily obtainable from AFMs or TrueType/OpenType font files; but there is no place to store it in an SVG font. SVG 1.1 spec explicitly refuses to provide bbox values for either glyphs or entire fonts (section 20.2). (The refusal looks like an overstatement - at least for the font bounding box, there is a 'bbox' attribute on 'font-face'. Helas, for individual glyph, no such expedient exists). Looks like I need to run an SVG rendering engine in order to compute bounding boxes -- definitely not an option for a modest Python script. On the other hand, support for SVG fonts in a MathML-to-SVG converter looks too appealing to discard it easily. What shall I do? Perhaps run an external application, and build an AFM out of the SVG font? Is anyone aware of a tool for this? Putting the question more generally - what is the rationale behind exclusion of bbox data? It really precludes using SVG fonts as sources of metric info in applications like mine. And I feel pretty strange recoding an SVG font into a legacy AFM... Regards, Nikolai Grigoriev
Received on Thursday, 9 June 2005 21:05:05 UTC