Oh, yes, I almost forgot: I'm removing the "dy" parameter for now since
it's not supported anyway until we support different writing-modes.
Doesn't make sense to keep that around until then.

On 03.02.2009 11:10:03 Jeremias Maerki wrote:
> I'm getting near to finishing my work on the new intermediate format.
> Logically, performance tests have to show whether the goals have been
> achieved. Generally, they have:
> - Rendering directly from the new intermediate is a lot faster than from
> the old area tree XML format.
> - The new intermediate files are also a lot smaller.
> - New output formats are much easier to implement than the old Renderers.
> However, the performance tests showed that the improvement for the
> PostScript output was rather small (and that's one of the most important
> formats in that context). The cause was my simplistic approach to glyph
> positioning (using the xshow operator). It causes at least one
> DecimalFormat.format() call per glyph even if the text has no kerning,
> letter/wordspacing or justification. So I had to revise my decision to
> simply carry a "dx" (from SVG) property with glyph offsets. Adding SVG's
> letter-spacing and word-spacing attributes made it possible to keep dx
> to null in many cases. Furthermore, a custom text painting operator in
> PostScript (similar to PDF's TJ) allowed much more compact PostScript
> code and brought the performance back in the region of PDF and AFP.
> So, IFPainter.drawText will get two new parameters letterSpacing and
> wordSpacing. I'm currently updating the rest of the output formats in a
> similar way (for example, PDF gets to use the Tc operator for
> letter-spacing). AFP will also profit from that. I'll commit when
> everything's working again.
> I'll also publish performance figures when this is done.
> Jeremias Maerki

Jeremias Maerki

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