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Atari coding BBS
| VDI clipping |
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Posted by: ragnar
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Mar,15.2011-07:05
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Hi all,
as you may know, m0n0 is porting netsurf to out beloved Atari. He asked in the Mint Mailinglist this.
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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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Please give answers here or at the Mint Mailinglist which is available here: http://sparemint.org/mailinglist/
Thx a lot.
Bernd
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