[MPlayer-dev-eng] [PATCH] dynamic font generation

[Michael Niedermayer]

Hi

On Thursday 15 August 2002 22:47, Arpi wrote:
> Hi,
>
> > we could develop very fast outlining routine, and then use swscaler's
> > blur.
>
> arial.ttf 38pt latin-2 blur=3 outline=2.5:
>
> charset:    5873 us
> render:    18381 us
> outline:  278076 us
> gauss:     67838 us
>
> real    0m0.378s
> user    0m0.370s
> sys     0m0.000s
>
> using Michael's ideas:
> skipping color=255 (black) pixels in outline algo:
black is 255?

>
> charset:    5296 us
> render:    18373 us
> outline:  228103 us
> gauss:     68316 us
>
> skipping the division at the end fo outlien pixel calcutaion if max==0:
>
> charset:    6065 us
> render:    18391 us
> outline:  233063 us
> gauss:     68407 us
>
> so we could speed up a bit but not too much.
>
> we need a very fast algo to detect if we're close to a non-white pixel, so
> we could skip the big white areas.
./subfont --blur 3 --outline 2.5 iso8859-2 38pt /c/windows/fonts/arial.ttf 

255 skip:
charset:   24857 us
render:    60615 us
outline:  506763 us
gauss:    195062 us

black skip:
./subfont --blur 3 --outline 2.5 iso8859-2 38pt /c/windows/fonts/arial.ttf 
charset:   17092 us
render:    61736 us
outline:   79030 us
gauss:    194719 us

[...]

Michael