[Mesa-dev] [PATCH] st/mesa: increase viewport bounds limits for GL4 hw

[Marek Olšák]

Reviewed-by: Marek Olšák <marek.olsak at amd.com>

Marek

On Tue, Sep 8, 2015 at 10:59 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> According to the ARB_viewport_array spec, GL4 limit is higher than the
> GL3 limit. Also take this opportunity to fix the GL3 limit.
>
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> Cc: "11.0" <mesa-stable at lists.freedesktop.org>
> ---
>  src/mesa/state_tracker/st_extensions.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
> index 17f572f..884761c 100644
> --- a/src/mesa/state_tracker/st_extensions.c
> +++ b/src/mesa/state_tracker/st_extensions.c
> @@ -873,8 +873,13 @@ void st_init_extensions(struct pipe_screen *screen,
>
>     consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
>     if (consts->MaxViewports >= 16) {
> -      consts->ViewportBounds.Min = -16384.0;
> -      consts->ViewportBounds.Max = 16384.0;
> +      if (glsl_feature_level >= 400) {
> +         consts->ViewportBounds.Min = -32768.0;
> +         consts->ViewportBounds.Max = 32767.0;
> +      } else {
> +         consts->ViewportBounds.Min = -16384.0;
> +         consts->ViewportBounds.Max = 16383.0;
> +      }
>        extensions->ARB_viewport_array = GL_TRUE;
>        extensions->ARB_fragment_layer_viewport = GL_TRUE;
>        if (extensions->AMD_vertex_shader_layer)
> --
> 2.4.6
>
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