1 files changed, 73 insertions, 0 deletions
diff --git a/tools/timer/Timer.h b/tools/timer/Timer.h
new file mode 100644
index 0000000000..7a91ac6e53
--- /dev/null
+++ b/tools/timer/Timer.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef Timer_DEFINED
+#define Timer_DEFINED
+
+#include "SkTypes.h"
+
+#if defined(SK_BUILD_FOR_WIN32)
+    #include "SysTimer_windows.h"
+#elif defined(SK_BUILD_FOR_MAC)
+    #include "SysTimer_mach.h"
+#elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID)
+    #include "SysTimer_posix.h"
+#endif
+
+#if SK_SUPPORT_GPU
+    #include "GpuTimer.h"
+#endif
+
+class SkGLContextHelper;
+
+/**
+ * SysTimers and GpuTimers are implemented orthogonally.
+ * This class combines 2 SysTimers and a GpuTimer into one single,
+ * platform specific Timer with a simple interface. The truncated
+ * timer doesn't include the time required for the GPU to finish
+ * its rendering. It should always be <= the un-truncated system
+ * times and (for GPU configurations) can be used to roughly (very
+ * roughly) gauge the GPU load/backlog.
+ */
+class Timer {
+public:
+    explicit Timer(SkGLContextHelper* gl = NULL);
+
+    void start();
+    void truncatedEnd();
+    void end();
+
+    // All times in milliseconds.
+    double fCpu;
+    double fWall;
+    double fTruncatedCpu;
+    double fTruncatedWall;
+    double fGpu;
+
+private:
+    SysTimer fSysTimer;
+    SysTimer fTruncatedSysTimer;
+#if SK_SUPPORT_GPU
+    GpuTimer fGpuTimer;
+#endif
+};
+
+// Same as Timer above, supporting only fWall but with much lower overhead.
+// (Typically, ~30ns instead of Timer's ~1us.)
+class WallTimer {
+public:
+    WallTimer();
+
+    void start();
+    void end();
+
+    double fWall;  // Milliseconds.
+
+private:
+    SysTimer fSysTimer;
+};
+
+#endif