[Mesa-dev] [PATCH] egl_dri2: set ctx->WindowRenderBuffer

[Chad Versace]

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On 08/28/2011 08:38 AM, Chia-I Wu wrote:
> From: Chia-I Wu <olv at lunarg.com>
> 
> Set ctx->WindowRenderBuffer to EGL_BACK_BUFFER.  As EGL_WINDOW_BIT of a
> config is set only when there is dri_double_buffer, that makes sure
> window surfaces are always double-buffered and contexts will render to
> the back buffer.
> ---
>  src/egl/drivers/dri2/egl_dri2.c |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
> index 4aa1df0..0099a0d 100644
> --- a/src/egl/drivers/dri2/egl_dri2.c
> +++ b/src/egl/drivers/dri2/egl_dri2.c
> @@ -697,6 +697,12 @@ dri2_create_context(_EGLDriver *drv, _EGLDisplay *disp, _EGLConfig *conf,
>           dri_config = dri2_config->dri_double_config;
>        else
>           dri_config = dri2_config->dri_single_config;
> +
> +      /* EGL_WINDOW_BIT is set only when there is a dri_double_config.  This
> +       * makes sure the back buffer will always be used.
> +       */
> +      if (conf->SurfaceType & EGL_WINDOW_BIT)
> +         dri2_ctx->base.WindowRenderBuffer = EGL_BACK_BUFFER;
>     }
>     else
>        dri_config = NULL;

Yes. Now eglQuerySurface(EGL_RENDER_BUFFER) will do the right thing.

Reviewed-by: Chad Versace <chad at chad-versace.us>

- -- 
Chad Versace
chad at chad-versace.us
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