diff options
Diffstat (limited to 'src/compiler/glsl/link_varyings.cpp')
| -rw-r--r-- | src/compiler/glsl/link_varyings.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/compiler/glsl/link_varyings.cpp b/src/compiler/glsl/link_varyings.cpp index 33eb7d0e8bc..8aefb7e201d 100644 --- a/src/compiler/glsl/link_varyings.cpp +++ b/src/compiler/glsl/link_varyings.cpp @@ -849,6 +849,17 @@ parse_tfeedback_decls(struct gl_context *ctx, struct gl_shader_program *prog, } +static int +cmp_xfb_offset(const void * x_generic, const void * y_generic) +{ + tfeedback_decl *x = (tfeedback_decl *) x_generic; + tfeedback_decl *y = (tfeedback_decl *) y_generic; + + if (x->get_buffer() != y->get_buffer()) + return x->get_buffer() - y->get_buffer(); + return x->get_offset() - y->get_offset(); +} + /** * Store transform feedback location assignments into * prog->LinkedTransformFeedback based on the data stored in tfeedback_decls. @@ -870,6 +881,14 @@ store_tfeedback_info(struct gl_context *ctx, struct gl_shader_program *prog, memset(&prog->LinkedTransformFeedback, 0, sizeof(prog->LinkedTransformFeedback)); + /* The xfb_offset qualifier does not have to be used in increasing order + * however some drivers expect to receive the list of transform feedback + * declarations in order so sort it now for convenience. + */ + if (has_xfb_qualifiers) + qsort(tfeedback_decls, num_tfeedback_decls, sizeof(*tfeedback_decls), + cmp_xfb_offset); + prog->LinkedTransformFeedback.Varyings = rzalloc_array(prog, struct gl_transform_feedback_varying_info, |