[Mesa-dev] WL_bind_wayland_display

[Pekka Paalanen]

On Sun, 26 May 2013 17:38:41 +0200
Wladimir <laanwj at gmail.com> wrote:

> Hello all,
> 
> I was reading the WL_bind_wayland_display extension spec and noticed the
> following:
> 
>         EGL_TEXTURE_Y_U_V_WL
>                 Three planes, samples Y from the first plane to r in
>                 the shader, U from the second plane to r, and V from
>                 the third plane to r.
> 
>         EGL_TEXTURE_Y_UV_WL
>                 Two planes, samples Y from the first plane to r in
>                 the shader, U and V from the second plane to rg.
> 
>         EGL_TEXTURE_Y_XUXV_WL
>                 Two planes, samples Y from the first plane to r in
>                 the shader, U and V from the second plane to g and a.
> 
> How does this work? EGL_TEXTURE_Y_U_V_WL puts all planes in r;
> EGL_TEXTURE_Y_UV_WL puts a plane in r and one in rg (thus overlapping).

Hi Wladimir,

it is used like this:
http://cgit.freedesktop.org/wayland/weston/tree/src/gl-renderer.c?id=14e438c8a2bc7342489d248a3d66b9123245d552#n1220

You get a separate EGLImage for each plane.


Cheers,
pq