[Pixman] Source clipping: how-to and tests

[Pekka Paalanen]

On Tue, 3 Mar 2015 13:47:22 +0100
Petr Kobalíček <kobalicek.petr at gmail.com> wrote:

> Hi Pekka,
> 
> Can't be this solved by creating a subimage based on the input image and
> the viewport? This way you can basically use the same pipeline. I'm not
> sure, however, if I fully understand the issue.

Hi,

that's what Siarhei suggested below. It seems to work too, I just got
it implemented.


Thanks,
pq

> On Tue, Mar 3, 2015 at 8:49 AM, Pekka Paalanen <ppaalanen at gmail.com> wrote:
> 
> > On Mon, 2 Mar 2015 17:33:16 +0200
> > Siarhei Siamashka <siarhei.siamashka at gmail.com> wrote:
> >
> > > In some cases, the source image clipping might be simulated by
> > > just wrapping a rectangular area of an existing image as a new
> > > pixman_image_t. And then using it as the source image in the
> > > compositing operation.
> >
> > That's an excellent idea! I will try that.