glcpp: Set extension defines after resolving the GLSL version.

Instead of defining preprocessor macros in glcpp_parser_create based on
the GL API, wait until the shader version has been resolved. Doing this
allows us to correctly set (and not set) preprocessor macros for
extensions allowed by the API but not the shader, as in the case of
ARB_ES3_compatibility.

The shader version has been resolved when the preprocessor encounters
the first preprocessor token, since the GLSL spec says

   "The #version directive must occur in a shader before anything else,
    except for comments and white space."

Specifically, if a #version token is found the version is known
explicitly, and if any other preprocessor token is found then the GLSL
version is implicitly 1.10.

Cc: [email protected]
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71630
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/glsl/glcpp/glcpp.h b/src/glsl/glcpp/glcpp.h
index 85f3fdcd2cd..4aa200a635d 100644
--- a/src/glsl/glcpp/glcpp.h
+++ b/src/glsl/glcpp/glcpp.h
@@ -182,6 +182,8 @@ struct glcpp_parser {
 	size_t output_length;
 	size_t info_log_length;
 	int error;
+	const struct gl_extensions *extensions;
+	bool version_resolved;
 	bool has_new_line_number;
 	int new_line_number;
 	bool has_new_source_number;
@@ -192,7 +194,7 @@ struct glcpp_parser {
 struct gl_extensions;
 
 glcpp_parser_t *
-glcpp_parser_create (const struct gl_extensions *extensions, int api);
+glcpp_parser_create (const struct gl_extensions *extensions);
 
 int
 glcpp_parser_parse (glcpp_parser_t *parser);
@@ -200,6 +202,9 @@ glcpp_parser_parse (glcpp_parser_t *parser);
 void
 glcpp_parser_destroy (glcpp_parser_t *parser);
 
+void
+glcpp_parser_resolve_version(glcpp_parser_t *parser);
+
 int
 glcpp_preprocess(void *ralloc_ctx, const char **shader, char **info_log,
 	   const struct gl_extensions *extensions, struct gl_context *g_ctx);