From b8c44b81abb7d83fe41e07cae558b30042255b9a Mon Sep 17 00:00:00 2001
From: Aaron Culliney <devnull@deadc0de.org>
Date: Sun, 18 Jan 2015 11:10:16 -0800
Subject: [PATCH] Simple FPS logging

---
 src/video/glvideo.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/video/glvideo.c b/src/video/glvideo.c
index 4e040433..35cedeef 100644
--- a/src/video/glvideo.c
+++ b/src/video/glvideo.c
@@ -586,6 +586,23 @@ static void gldriver_shutdown(void) {
 //
 #if USE_GLUT
 static void gldriver_update(int unused) {
+#if DEBUG_GL
+    static uint32_t prevCount = 0;
+    static uint32_t idleCount = 0;
+
+    idleCount++;
+
+    static struct timespec prev = { 0 };
+    struct timespec now;
+    clock_gettime(CLOCK_MONOTONIC, &now);
+
+    if (now.tv_sec != prev.tv_sec) {
+        LOG("gldriver_update() : %u", idleCount-prevCount);
+        prevCount = idleCount;
+        prev = now;
+    }
+#endif
+
     c_keys_handle_input(-1, 0, 0);
     glutPostRedisplay();
     glutTimerFunc(17, gldriver_update, 0);