Re: New Rasterizer available..

[Just van Rossum]

At 3:28 PM +0100 08-03-2000, David Turner wrote:
>Thanks, I'd like to inform you that apparently, I've found that ftraster.c
>produces some unexpected artifacts at small pixel sizes. These are really
>hard to spot but can be rather bothering if you want the highest possible
>quality..

I have spotted some minor artifacts at large sizes, too, but what I found
more annoying is that it looked rather jagged on almost horizontal lines
and curves.

>All right, I have just commited to the CVS Repository my current working
>version of this new raster. Everything is in "demos/src", look at the files
>"ftgrays.h" and "ftgrays.c".

I just checked it out and in this regard it's *much* better! Thanks.

>I have also updated the "ftview" and "fttimer" modules in order to support
>it. When in "ftview", press "g" to toggle between the "old" and "new"
>renderer,
>and see the difference..

Cool. Works as advertized ;-)

>Note that the new code computes the _exact_ coverage of the outline on
>each pixel
>grid. However, some diagonals & curves look more fuzzy than with the old
>ftraster.c
>I believe this could be corrected in a near future through a gamma table
>or something
>similar..

It does look a lot more fuzzy indeed (FullFuzz(tm) ;-). For graphics and
large sizes that's not a problem at all, but I must say the "old" raster
looks quite a bit better for small text.

Just