glsl: add xfb_stride link time validation

From the ARB_enhanced_layous spec:

   "It is a compile-time or link-time error to have any *xfb_offset*
    that overflows *xfb_stride*, whether stated on declarations before
    or after the *xfb_stride*, or in different compilation units.

    ...

    When no *xfb_stride* is specified for a buffer, the stride of a
    buffer will be the smallest needed to hold the variable placed at
    the highest offset, including any required padding."

Reviewed-by: Dave Airlie <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/compiler/glsl/link_varyings.h b/src/compiler/glsl/link_varyings.h
index 7165ecb9184..7919a8d5cd5 100644
--- a/src/compiler/glsl/link_varyings.h
+++ b/src/compiler/glsl/link_varyings.h
@@ -98,7 +98,8 @@ public:
    unsigned get_num_outputs() const;
    bool store(struct gl_context *ctx, struct gl_shader_program *prog,
               struct gl_transform_feedback_info *info, unsigned buffer,
-              const unsigned max_outputs, bool has_xfb_qualifiers) const;
+              const unsigned max_outputs, bool *explicit_stride,
+              bool has_xfb_qualifiers) const;
    const tfeedback_candidate *find_candidate(gl_shader_program *prog,
                                              hash_table *tfeedback_candidates);