| Hey,
If you really really need to do that - I advice you not to (see if you can optimize other stuff instead, if possible) - have a look at Zorros code (zDesk sources).
He has a fairly efficient text rout which generates text in a monochrome buffer which is then blitted to screen. It can be optimized further, but imo the code looks nice.
-- PeP
15 mar 2011 kl. 00.08 skrev m0n0:
Hello guys ,
probably not really the right place to ask... but I guess some
people here know a lot about VDI =)
I'm currently improving font rendering within netsurf a bit... I
want to make the drawing faster, at least for font renderer which
support monochrom glyphs.
My question is: should I calculate clippings for each character
myself, or should i just let VDI do the job? As I said, this will
be called for each and every character...
but doing the clipping myself takes at least 3 calls to
rc_intersect and some grect x = grect y etc.
From the pure source code point of view vs_clip is a lot less to
do... but I don't know how much overhead it introduces. First: is
the call expensive ( traps involved...)? Second: How expensive is
clipping during the raster operation?
Infomation would be nice - as always =) !
Greets,
m
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