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-rw-r--r--src/gallium/auxiliary/hud/hud_fps.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/hud/hud_fps.c b/src/gallium/auxiliary/hud/hud_fps.c
new file mode 100644
index 00000000000..71cdfd04ee7
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+++ b/src/gallium/auxiliary/hud/hud_fps.c
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+/**************************************************************************
+ *
+ * Copyright 2013 Marek Olšák <[email protected]>
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/* This file contains code for calculating framerate for displaying on the HUD.
+ */
+
+#include "hud/hud_private.h"
+#include "os/os_time.h"
+#include "util/u_memory.h"
+
+struct fps_info {
+ int frames;
+ uint64_t last_time;
+};
+
+static void
+query_fps(struct hud_graph *gr)
+{
+ struct fps_info *info = gr->query_data;
+ uint64_t now = os_time_get();
+
+ info->frames++;
+
+ if (info->last_time) {
+ if (info->last_time + gr->pane->period <= now) {
+ double fps = info->frames * 1000000 / (double)(now - info->last_time);
+ info->frames = 0;
+ info->last_time = now;
+
+ hud_graph_add_value(gr, fps);
+ }
+ }
+ else {
+ info->last_time = now;
+ }
+}
+
+void
+hud_fps_graph_install(struct hud_pane *pane)
+{
+ struct hud_graph *gr = CALLOC_STRUCT(hud_graph);
+
+ if (!gr)
+ return;
+
+ strcpy(gr->name, "fps");
+ gr->query_data = CALLOC_STRUCT(fps_info);
+ if (!gr->query_data) {
+ FREE(gr);
+ return;
+ }
+
+ gr->query_new_value = query_fps;
+ gr->free_query_data = free;
+
+ hud_pane_add_graph(pane, gr);
+}