glcpp: Accept pointer to GL context rather than just the API version

As the preprocessor becomes more sophisticated and gains more optional
behavior, it's easiest to just pass the GL context pointer to it so that
it can examine any fields there that it needs to (such as API version,
or the state of any driconf options, etc.).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/glsl/glcpp/glcpp.c

@@ -94,6 +94,14 @@ load_text_file(void *ctx, const char *filename)
 	return text;
 }
 
+/* Initialize only those things that glcpp cares about.
+ */
+static void
+init_fake_gl_context (struct gl_context *gl_ctx)
+{
+	gl_ctx->API = API_OPENGL_COMPAT;
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -102,6 +110,9 @@ main (int argc, char *argv[])
 	char *info_log = ralloc_strdup(ctx, "");
 	const char *shader;
 	int ret;
+	struct gl_context gl_ctx;
+
+	init_fake_gl_context (&gl_ctx);
 
 	if (argc) {
 		filename = argv[1];
@@ -111,7 +122,7 @@ main (int argc, char *argv[])
 	if (shader == NULL)
 	   return 1;
 
-	ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, API_OPENGL_COMPAT);
+	ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, &gl_ctx);
 
 	printf("%s", shader);
 	fprintf(stderr, "%s", info_log);

src/glsl/glcpp/glcpp.h

@@ -27,6 +27,8 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+#include "main/mtypes.h"
+
 #include "../ralloc.h"
 
 #include "program/hash_table.h"
@@ -198,7 +200,7 @@ glcpp_parser_destroy (glcpp_parser_t *parser);
 
 int
 glcpp_preprocess(void *ralloc_ctx, const char **shader, char **info_log,
-	   const struct gl_extensions *extensions, int api);
+	   const struct gl_extensions *extensions, struct gl_context *g_ctx);
 
 /* Functions for writing to the info log */
 

src/glsl/glcpp/pp.c

@@ -151,10 +151,10 @@ remove_line_continuations(glcpp_parser_t *ctx, const char *shader)
 
 int
 glcpp_preprocess(void *ralloc_ctx, const char **shader, char **info_log,
-	   const struct gl_extensions *extensions, int api)
+	   const struct gl_extensions *extensions, struct gl_context *gl_ctx)
 {
 	int errors;
-	glcpp_parser_t *parser = glcpp_parser_create (extensions, api);
+	glcpp_parser_t *parser = glcpp_parser_create (extensions, gl_ctx->API);
 	*shader = remove_line_continuations(parser, *shader);
 
 	glcpp_lex_set_source_string (parser, *shader);