[QUESTION] Debug presets

[utoni]

Please confirm the following points:

• This question is NOT about the Android apps in the Play Store
• I have searched the project page to check if the question was already asked elsewhere

Topic

Milkdrop Presets

Your Request

Is there any programmatic way to debug custom made Milkdrop presets?
I would like to see, why my preset does not load an image.

I've added the following lines to src/sdl-test-ui/projectM_SDL_main.cpp:

--- a/src/sdl-test-ui/projectM_SDL_main.cpp
+++ b/src/sdl-test-ui/projectM_SDL_main.cpp
@@ -71,9 +71,16 @@ static int mainLoop(void *userData) {
     return 0;
 }
 
+static void log_callback(const char * const msg, projectm_log_level, void*) {
+    printf("Log Callback: %s\n", msg);
+}
+
 int main(int argc, char *argv[]) {
+    projectm_set_log_callback(log_callback, false, NULL);
+    projectm_set_log_level(PROJECTM_LOG_LEVEL_DEBUG, false);
+
     projectMSDL *app = setupSDLApp();
-    
+
     int status = mainLoop(&app);
 
     // cleanup

But there is not much debug output here. What am I doing wrong?