Amend st_module.

Add a enum to st_module to describe the API supported by the module.

1 files changed, 16 insertions, 5 deletions

diff --git a/st_api.h b/st_api.h
index 6cba1b9..940c896 100644
--- a/st_api.h
+++ b/st_api.h
@@ -45,10 +45,20 @@
 /**
  * The entry points of the state trackers.
  */
-#define ST_MODULE_OPENGL      "st_module_OpenGL"
-#define ST_MODULE_OPENGL_ES1  "st_module_OpenGL_ES1"
-#define ST_MODULE_OPENGL_ES2  "st_module_OpenGL_ES2"
-#define ST_MODULE_OPENVG      "st_module_OpenVG"
+#define ST_MODULE_OPENGL_SYMBOL      "st_module_OpenGL"
+#define ST_MODULE_OPENGL_ES1_SYMBOL  "st_module_OpenGL_ES1"
+#define ST_MODULE_OPENGL_ES2_SYMBOL  "st_module_OpenGL_ES2"
+#define ST_MODULE_OPENVG_SYMBOL      "st_module_OpenVG"
+
+/**
+ * The supported rendering API of a state tracker.
+ */
+enum st_module_api {
+   ST_MODULE_OPENGL,
+   ST_MODULE_OPENGL_ES1,
+   ST_MODULE_OPENGL_ES2,
+   ST_MODULE_OPENVG,
+};
 
 /**
  * Used in st_context->teximage.
@@ -326,10 +336,11 @@ struct st_api
  */
 struct st_module
 {
+   enum st_module_api api;
    struct st_api *(*create_api)(const struct st_manager_api *smapi);
 };
 
-/* these symbols should be dynamically looked up */
+/* these symbols may need to be dynamically lookup up */
 extern PUBLIC const struct st_module st_module_OpenGL;
 extern PUBLIC const struct st_module st_module_OpenGL_ES1;
 extern PUBLIC const struct st_module st_module_OpenGL_ES2;