Big glfw refactor

I did a lot of this in a very ad-hoc fashion with no proper commit
history. As such, the kindest thing to do seemed to be to just squash it
into this one commit.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/log.h b/src/log.h
index a426289..43b1894 100644
--- a/src/log.h
+++ b/src/log.h
@@ -8,8 +8,15 @@ enum imv_log_level {
   IMV_ERROR
 };
 
-void imv_log_set_level(enum imv_log_level level);
-
+/* Write to the log */
 void imv_log(enum imv_log_level level, const char *fmt,  ...);
 
+typedef void (*imv_log_callback)(enum imv_log_level level, const char *text, void *data);
+
+/* Subscribe to the log, callback is called whenever a log entry is written */
+void imv_log_add_log_callback(imv_log_callback callback, void *data);
+
+/* Unsubscribe from the log */
+void imv_log_remove_log_callback(imv_log_callback callback);
+
 #endif