glsl: Define GL_ES preprocessor macro if API is OpenGL ES 2.0.

Also define it if #version 100 is encountered.

src/glsl/glcpp/glcpp-parse.h

@@ -1,10 +1,9 @@
-
-/* A Bison parser, made by GNU Bison 2.4.1.  */
+/* A Bison parser, made by GNU Bison 2.4.3.  */
 
 /* Skeleton interface for Bison's Yacc-like parsers in C
    
-      Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-   Free Software Foundation, Inc.
+      Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+   2009, 2010 Free Software Foundation, Inc.
    
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/glsl/glcpp/glcpp-parse.y

@@ -30,6 +30,7 @@
 
 #include "glcpp.h"
 #include "main/core.h" /* for struct gl_extensions */
+#include "main/mtypes.h" /* for gl_api enum */
 
 #define glcpp_print(stream, str) stream = talloc_strdup_append(stream, str)
 #define glcpp_printf(stream, fmt, args, ...) \
@@ -309,6 +310,9 @@ control_line:
 		_glcpp_parser_skip_stack_pop (parser, & @1);
 	}
 |	HASH_VERSION integer_constant NEWLINE {
+		if ($2 == 100)
+			add_builtin_define (parser, "GL_ES", 1);
+
 		macro_t *macro = hash_table_find (parser->defines, "__VERSION__");
 		if (macro) {
 			hash_table_remove (parser->defines, "__VERSION__");
@@ -1048,7 +1052,7 @@ static void add_builtin_define(glcpp_parser_t *parser,
 }
 
 glcpp_parser_t *
-glcpp_parser_create (const struct gl_extensions *extensions)
+glcpp_parser_create (const struct gl_extensions *extensions, int api)
 {
 	glcpp_parser_t *parser;
 	int language_version;
@@ -1078,6 +1082,9 @@ glcpp_parser_create (const struct gl_extensions *extensions)
 	add_builtin_define(parser, "GL_ARB_draw_buffers", 1);
 	add_builtin_define(parser, "GL_ARB_texture_rectangle", 1);
 
+	if (api == API_OPENGLES2)
+		add_builtin_define(parser, "GL_ES", 1);
+
 	if (extensions != NULL) {
 	   if (extensions->EXT_texture_array) {
 	      add_builtin_define(parser, "GL_EXT_texture_array", 1);

src/glsl/glcpp/glcpp.c

@@ -28,6 +28,7 @@
 #include <string.h>
 #include <errno.h>
 #include "glcpp.h"
+#include "main/mtypes.h"
 
 extern int yydebug;
 
@@ -111,7 +112,7 @@ main (int argc, char *argv[])
 	if (shader == NULL)
 	   return 1;
 
-	ret = preprocess(ctx, &shader, &info_log, NULL);
+	ret = preprocess(ctx, &shader, &info_log, NULL, API_OPENGL);
 
 	printf("%s", shader);
 	fprintf(stderr, "%s", info_log);

src/glsl/glcpp/glcpp.h

@@ -180,7 +180,7 @@ struct glcpp_parser {
 struct gl_extensions;
 
 glcpp_parser_t *
-glcpp_parser_create (const struct gl_extensions *extensions);
+glcpp_parser_create (const struct gl_extensions *extensions, int api);
 
 int
 glcpp_parser_parse (glcpp_parser_t *parser);
@@ -190,7 +190,7 @@ glcpp_parser_destroy (glcpp_parser_t *parser);
 
 int
 preprocess(void *talloc_ctx, const char **shader, char **info_log,
-	   const struct gl_extensions *extensions);
+	   const struct gl_extensions *extensions, int api);
 
 /* Functions for writing to the info log */
 

src/glsl/glcpp/pp.c

@@ -143,10 +143,10 @@ remove_line_continuations(glcpp_parser_t *ctx, const char *shader)
 
 int
 preprocess(void *talloc_ctx, const char **shader, char **info_log,
-	   const struct gl_extensions *extensions)
+	   const struct gl_extensions *extensions, int api)
 {
 	int errors;
-	glcpp_parser_t *parser = glcpp_parser_create (extensions);
+	glcpp_parser_t *parser = glcpp_parser_create (extensions, api);
 	*shader = remove_line_continuations(parser, *shader);
 
 	glcpp_lex_set_source_string (parser, *shader);