Require the shader target be specified to the driver program
diff --git a/glsl_parser_extras.cpp b/glsl_parser_extras.cpp
index caa221f..222f06b 100644
--- a/glsl_parser_extras.cpp
+++ b/glsl_parser_extras.cpp
@@ -684,8 +684,27 @@
struct simple_node *ptr;
exec_list instructions;
- (void) argc;
- shader = load_text_file(argv[1], & shader_len);
+ if (argc < 3) {
+ printf("Usage: %s [v|g|f] <shader_file>\n", argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ switch (argv[1][0]) {
+ case 'v':
+ state.target = vertex_shader;
+ break;
+ case 'g':
+ state.target = geometry_shader;
+ break;
+ case 'f':
+ state.target = fragment_shader;
+ break;
+ default:
+ printf("Usage: %s [v|g|f] <shader_file>\n", argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ shader = load_text_file(argv[2], & shader_len);
state.scanner = NULL;
make_empty_list(& state.translation_unit);