[PATCH 1/2] Fix clipping when windows are used as sources

[Maarten Maathuis]

On Mon, Jun 15, 2009 at 11:23 AM, Soeren Sandmann<sandmann at daimi.au.dk> wrote:
> Maarten Maathuis <madman2003 at gmail.com> writes:
>
>> Does this make transformed composite (XRGB source) with no extending
>> ok again with regards to the black pixels that a lot of hw sample
>> outside the texture?
>
> It doesn't change that.
>
>> Previously it switched from being ok to being bad, i'm just curious if
>> it changed again?
>
> The RENDER spec says that for REPEAT_NONE, pixels outside the texture
> are 0, which is what pixman has always done for transformed images and
> in 0.16.0 will also do in the non-transformed case. Previously it
> would clip those pixels away and not do any compositing for them.
>
> For operators like SRC, this is the difference between leaving the
> destination in place and painting it transparent black.

I'm still curious how a texture without alpha channel is supposed to
have transparent pixels.

>
>
> Soren
>