Hi,
Where does the spec say we should fail to link? I don't see such a
statement there.
It looks like varyings with stream > 0 should not be linked with the
fragment shader.
Marek
On Wed, Jun 18, 2014 at 11:51 AM, Iago Toral Quiroga <ito...@igalia.com> wrote:
> Outputs that are linked to inputs in the next stage must be output to stream
> 0,
> otherwise we should fail to link.
> ---
> src/glsl/link_varyings.cpp | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp
> index 9725a43..3b20594 100644
> --- a/src/glsl/link_varyings.cpp
> +++ b/src/glsl/link_varyings.cpp
> @@ -1345,6 +1345,14 @@ assign_varying_locations(struct gl_context *ctx,
> if (input_var || (prog->SeparateShader && consumer == NULL)) {
> matches.record(output_var, input_var);
> }
> +
> + /* Only stream 0 outputs can be consumed in the next stage */
> + if (input_var && output_var->data.stream != 0) {
> + linker_error(prog, "output %s is assigned to stream=%d but "
> + "is linked to an input, which requires stream=0",
> + output_var->name, output_var->data.stream);
> + return false;
> + }
> }
> } else {
> /* If there's no producer stage, then this must be a separable program.
> --
> 1.9.1
>
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