added 3dengfx into the repo, probably not the correct version for this

[summerhack] / src / 3dengfx / src / common / fps_counter.c

diff --git a/src/3dengfx/src/common/fps_counter.c b/src/3dengfx/src/common/fps_counter.c
new file mode 100644 (file)
index 0000000..48aeef0
--- /dev/null
+++ b/src/3dengfx/src/common/fps_counter.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include "fps_counter.h"
+
+void fps_start(fps_counter *fpsc, unsigned long time, unsigned long sample_interval) {
+       fpsc->sample_interval = sample_interval;
+       fpsc->sample_start_time = time;
+       fpsc->frame_count = 0;
+       fpsc->fps = 0.0f;
+}
+
+int fps_frame_proc(fps_counter *fpsc, unsigned long time) {
+       if(time - fpsc->sample_start_time < fpsc->sample_interval) {
+               fpsc->frame_count++;
+               return 0;
+       } else {
+               fpsc->fps = (float)fpsc->frame_count / ((float)fpsc->sample_interval / 1000.0f);
+
+               fpsc->sample_start_time = time;
+               fpsc->frame_count = 0;
+               return 1;
+       }
+}
+
+/* changed it to a macro, see header */
+/*
+float fps_get_frame_rate(fps_counter *fpsc) {
+       return fpsc->fps;
+}
+*/
+
+const char *fps_get_frame_rate_str(fps_counter *fpsc) {
+       static char str[32];
+       sprintf(str, "%.1f", fpsc->fps);
+       return str;
+}