diff options
| author | Chad Versace <[email protected]> | 2011-01-11 17:21:18 -0800 |
|---|---|---|
| committer | Chad Versace <[email protected]> | 2011-01-17 09:41:24 -0800 |
| commit | 605aacc67d73db0926e0046a90a07fcd93a2d613 (patch) | |
| tree | de484f94ab19f20b93a45c6611f63d3151a18d1e | |
| parent | 0e2f8936c8ef872cb464e54a9f09ae0324487147 (diff) | |
glsl: Check that interpolation qualifiers do not precede 'varying'
... and 'centroid varying'. The check is performed only in GLSL
versions >= 1.30.
From page 29 (page 35 of the PDF) of the GLSL 1.30 spec:
"interpolation qualifiers may only precede the qualifiers in, centroid
in, out, or centroid out in a declaration. They do not apply to the
deprecated storage qualifiers varying or centroid varying."
Fixes Piglit test
spec/glsl-1.30/compiler/interpolation-qualifiers/smooth-varying-01.frag.
| -rw-r--r-- | src/glsl/ast.h | 5 | ||||
| -rw-r--r-- | src/glsl/ast_to_hir.cpp | 26 | ||||
| -rw-r--r-- | src/glsl/ast_type.cpp | 7 |
3 files changed, 38 insertions, 0 deletions
diff --git a/src/glsl/ast.h b/src/glsl/ast.h index c096f9aa876..523a38937a5 100644 --- a/src/glsl/ast.h +++ b/src/glsl/ast.h @@ -366,6 +366,11 @@ struct ast_type_qualifier { unsigned location; /** + * Return true if and only if an interpolation qualifier is present. + */ + bool has_interpolation() const; + + /** * \brief Return string representation of interpolation qualifier. * * If an interpolation qualifier is present, then return that qualifier's diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp index 365a6e2676f..a2edb6a27cf 100644 --- a/src/glsl/ast_to_hir.cpp +++ b/src/glsl/ast_to_hir.cpp @@ -2277,6 +2277,32 @@ ast_declarator_list::hir(exec_list *instructions, } + /* Interpolation qualifiers cannot be applied to 'centroid' and + * 'centroid varying'. + * + * From page 29 (page 35 of the PDF) of the GLSL 1.30 spec: + * "interpolation qualifiers may only precede the qualifiers in, + * centroid in, out, or centroid out in a declaration. They do not apply + * to the deprecated storage qualifiers varying or centroid varying." + */ + if (state->language_version >= 130 + && this->type->qualifier.has_interpolation() + && this->type->qualifier.flags.q.varying) { + + const char *i = this->type->qualifier.interpolation_string(); + assert(i != NULL); + const char *s; + if (this->type->qualifier.flags.q.centroid) + s = "centroid varying"; + else + s = "varying"; + + _mesa_glsl_error(&loc, state, + "qualifier '%s' cannot be applied to the " + "deprecated storage qualifier '%s'", i, s); + } + + /* Process the initializer and add its instructions to a temporary * list. This list will be added to the instruction stream (below) after * the declaration is added. This is done because in some cases (such as diff --git a/src/glsl/ast_type.cpp b/src/glsl/ast_type.cpp index a8761611d36..f23e5457621 100644 --- a/src/glsl/ast_type.cpp +++ b/src/glsl/ast_type.cpp @@ -117,6 +117,13 @@ ast_fully_specified_type::has_qualifiers() const return this->qualifier.flags.i != 0; } +bool ast_type_qualifier::has_interpolation() const +{ + return this->flags.q.smooth + || this->flags.q.flat + || this->flags.q.noperspective; +} + const char* ast_type_qualifier::interpolation_string() const { |