Thanks eddie.
Too bad that I'm bad with blt.
But we really took care of your fixes so be sure that we will pay  
attention to the next ones :)

Stef


On 21 mars 06, at 07:49, Eddie Cottongim wrote:

> As some know, I spent some time looking into how to do the fastest  
> blts possible. The motivation for this was that the  
> LookEnhancements in 3.9 put a heavy load on BitBlt for things like  
> window resizing and other common things that people expect to be  
> very fluid.
>
> The result was a promising architecture, but I ran out of steam on  
> this after getting it to a 'first demo' stage. It runs from within  
> squeak, at 1 and 32 bit depths, on rules 3 and 25 (the most  
> common), but not as a drop-in replacement. The prospect of getting  
> it to work with the many modes of operation that Squeak's bitblt  
> has scared me off for now, but it should be possible.
>
> The demonstrated performance gain for the supported modes ranges  
> from 1.3x to 14x. Most of the performance opportunities exist in  
> color conversions; Squeak's bitblt is fairly close to optimal when  
> no conversion is needed. Color conversion was also one thing I  
> never completely figured out, and I was worried that my highly  
> specific color conversion routines would not offer the flexibility  
> that Squeak's mechanism offers.
>
> I wanted to make this available in case anyone is interested. I  
> also thank all the people on IRC that put up with my questions.
>
> A brief description, as well as source code files, are located here.
> http://minnow.cc.gatech.edu/squeak/5845
>
> Eddie
>
>