[luatex] LuaTeX file almost 2.5x bigger
hartmut_henkel at gmx.de
Sun Aug 8 13:10:28 CEST 2010
On Sun, 8 Aug 2010, Reinhard Kotucha wrote:
> There is probably some room for improvements. The TJ operator
> supports kerning already quite similar to dvips, which is very
> Example (from the PDF reference manual):
> [(A) 120 (W) 120 (A) 95 (Y)] TJ
that's already being used, as long as no expand change is needed. The
reason for repeated Tm is that different glyphs in a line may have
different efcode tagged to them, so that several expand switches are
needed in the same line.
> And the Th operator supports horizontal scaling.
> I think that a lot of space can be saved if these operators are used
> instead of the TextMatrix.
yes, one could try this. I refrained from using Th as it's not entirely
clear yet how the absolute horizontal PDF position is incrementally
updated when using Th TJ Th TJ sequences, in particular with mixed
horizontal and vertical typesetting. This would need some experimenting.
With the absolute position reset done be Tm it's rather safe.
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