[Mesa-dev] [PATCH v2 3/3] egl/wayland: Implement EGL_EXT_buffer_age

[Ander Conselvan de Oliveira]

On 01/09/2013 04:45 PM, Kristian Høgsberg wrote:
> ---
>   src/egl/drivers/dri2/platform_wayland.c |   25 ++++++++++++++++++++++++-
>   1 file changed, 24 insertions(+), 1 deletion(-)
>
> diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
> index 5b5c849..e9a66af 100644
> --- a/src/egl/drivers/dri2/platform_wayland.c
> +++ b/src/egl/drivers/dri2/platform_wayland.c
> @@ -286,6 +286,7 @@ get_back_bo(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
>                                           __DRI_BUFFER_BACK_LEFT, 32,
>                                           dri2_surf->base.Width,
>                                           dri2_surf->base.Height);
> +      dri2_surf->back->age = 0;
>      }
>      if (dri2_surf->back->dri_buffer == NULL)
>         return -1;
> @@ -445,7 +446,7 @@ dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
>   {
>      struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
>      struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
> -   int ret = 0;
> +   int i, ret = 0;
>
>      while (dri2_surf->frame_callback && ret != -1)
>         ret = wl_display_dispatch_queue(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
> @@ -458,6 +459,11 @@ dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
>      wl_proxy_set_queue((struct wl_proxy *) dri2_surf->frame_callback,
>                         dri2_dpy->wl_queue);
>
> +   for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
> +      if (dri2_surf->color_buffers[i].age > 0)
> +         dri2_surf->color_buffers[i].age++;
> +
> +   dri2_surf->back->age = 1;
>      dri2_surf->current = dri2_surf->back;
>      dri2_surf->back = NULL;
>
> @@ -496,6 +502,21 @@ dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
>      return EGL_TRUE;
>   }
>
> +static EGLint
> +dri2_query_buffer_age(_EGLDriver *drv,
> +                      _EGLDisplay *disp, _EGLSurface *surface)
> +{
> +   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
> +   __DRIbuffer buffer;
> +
> +   if (get_back_bo(dri2_surf, &buffer) < 0) {
> +      _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
> +      return 0;
> +   }
> +
> +   return dri2_surf->back->age;
> +}
> +
>   static int
>   dri2_wayland_authenticate(_EGLDisplay *disp, uint32_t id)
>   {
> @@ -633,6 +654,7 @@ dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
>      drv->API.DestroySurface = dri2_destroy_surface;
>      drv->API.SwapBuffers = dri2_swap_buffers;
>      drv->API.Terminate = dri2_terminate;
> +   drv->API.QueryBufferAge = dri2_query_buffer_age;
>
>      dri2_dpy = calloc(1, sizeof *dri2_dpy);
>      if (!dri2_dpy)
> @@ -697,6 +719,7 @@ dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
>      }
>
>      disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
> +   disp->Extensions.EXT_buffer_age = EGL_TRUE;
>      dri2_dpy->authenticate = dri2_wayland_authenticate;
>
>      /* we're supporting EGL 1.4 */
>


Reviewed-by: Ander Conselvan de Oliveira <conselvan2 at gmail.com>