[client] overlay: allow registration of runtime configuration options

client/src/main.c

@@ -820,11 +820,11 @@ static int lg_run(void)
   DEBUG_INFO("Using font: %s", g_state.fontName);
 
   g_state.overlays = ll_new();
+  app_registerOverlay(&LGOverlayConfig, NULL);
   app_registerOverlay(&LGOverlayAlert , NULL);
   app_registerOverlay(&LGOverlayFPS   , NULL);
   app_registerOverlay(&LGOverlayGraphs, NULL);
   app_registerOverlay(&LGOverlayHelp  , NULL);
-  app_registerOverlay(&LGOverlayConfig, NULL);
 
   // initialize metrics ringbuffers
   g_state.renderTimings  = ringbuffer_new(256, sizeof(float));

client/src/overlay/config.c

@@ -21,27 +21,50 @@
 #include "interface/overlay.h"
 #include "cimgui.h"
 #include "overlay_utils.h"
+#include "ll.h"
 
 #include "../main.h"
 #include "../overlays.h"
 #include "version.h"
 
+#include "common/debug.h"
 #include "common/appstrings.h"
 
+typedef struct ConfigCallback
+{
+  const char * title;
+  void * udata;
+  void (*callback)(void * udata);
+}
+ConfigCallback;
+
+typedef struct OverlayConfig
+{
+  struct ll * callbacks;
+}
+OverlayConfig;
+
+static OverlayConfig cfg = { 0 };
+
 static bool config_init(void ** udata, void * params)
 {
+  cfg.callbacks = ll_new();
+  if (!cfg.callbacks)
+  {
+    DEBUG_ERROR("failed to allocate ram");
+    return false;
+  }
+
   return true;
 }
 
 static void config_free(void * udata)
 {
-}
+  ConfigCallback * cb;
+  while(ll_shift(cfg.callbacks, (void **)&cb))
+    free(cb);
 
-static void graphIterator(GraphHandle handle, const char * name, bool * enabled,
-    void * udata)
-{
-  igTableNextColumn();
-  igCheckbox(name, enabled);
+  ll_free(cfg.callbacks);
 }
 
 static int config_render(void * udata, bool interactive, struct Rect * windowRects,
@@ -132,14 +155,12 @@ static int config_render(void * udata, bool interactive, struct Rect * windowRec
     }
   }
 
-  if(igCollapsingHeaderBoolPtr("Performance Metrics", NULL, 0))
+  ConfigCallback * cb;
+  for (ll_reset(cfg.callbacks); ll_walk(cfg.callbacks, (void **)&cb); )
   {
-    igCheckbox("Show Timing Graphs", &g_state.showTiming);
-    igSeparator();
-
-    igBeginTable("split", 2, 0, (ImVec2){}, 0);
-    overlayGraph_iterate(graphIterator, NULL);
-    igEndTable();
+    if (!igCollapsingHeaderBoolPtr(cb->title, NULL, 0))
+      continue;
+    cb->callback(cb->udata);
   }
 
   overlayGetImGuiRect(windowRects);
@@ -154,3 +175,19 @@ struct LG_OverlayOps LGOverlayConfig =
   .free           = config_free,
   .render         = config_render
 };
+
+void overlayConfig_register(const char * title, void (*callback)(void * udata),
+    void * udata)
+{
+  ConfigCallback * cb = calloc(1, sizeof(*cb));
+  if (!cb)
+  {
+    DEBUG_ERROR("failed to allocate ram");
+    return;
+  }
+
+  cb->title    = title;
+  cb->udata    = udata;
+  cb->callback = callback;
+  ll_push(cfg.callbacks, cb);
+};

client/src/overlay/graphs.c

@@ -22,6 +22,7 @@
 #include "cimgui.h"
 
 #include "../main.h"
+#include "../overlays.h"
 
 #include "ll.h"
 #include "common/debug.h"
@@ -43,9 +44,28 @@ struct OverlayGraph
   float        max;
 };
 
+
+static void configCallback(void * udata)
+{
+  igCheckbox("Show Timing Graphs", &g_state.showTiming);
+  igSeparator();
+
+  igBeginTable("split", 2, 0, (ImVec2){}, 0);
+
+  GraphHandle graph;
+  for (ll_reset(gs.graphs); ll_walk(gs.graphs, (void **)&graph); )
+  {
+    igTableNextColumn();
+    igCheckbox(graph->name, &graph->enabled);
+  }
+
+  igEndTable();
+}
+
 static bool graphs_init(void ** udata, void * params)
 {
   gs.graphs = ll_new();
+  overlayConfig_register("Performance Metrics", configCallback, NULL);
   return true;
 }
 

client/src/overlays.h

@@ -33,6 +33,9 @@ GraphHandle overlayGraph_register(const char * name, RingBuffer buffer,
     float min, float max);
 void overlayGraph_unregister();
 void overlayGraph_iterate(void (*callback)(GraphHandle handle, const char * name,
-      bool * enabled, void * udata), void * udata);
+    bool * enabled, void * udata), void * udata);
+
+void overlayConfig_register(const char * title, void (*callback)(void * udata),
+    void * udata);
 
 #endif