For Wayland you can easily make another shm buffer out of a subrectangle
of an existing one by using the appropriate stride.
I don't know if this can be done with egl.
Because pixman is already dealing with stride, it certainly should be
technically possible to deal with an arbitrary rectangle clipped out of
the source image. The api to make a new pixman_image_t seems like the
right approach because it is by defnintion only a rectangle.
On 03/03/2015 05:36 AM, Pekka Paalanen wrote:
On Tue, 3 Mar 2015 13:47:22 +0100
Petr Kobalíček <kobalicek.p...@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 <ppaala...@gmail.com> wrote:
On Mon, 2 Mar 2015 17:33:16 +0200
Siarhei Siamashka <siarhei.siamas...@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.
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