1 files changed, 29 insertions, 0 deletions
diff --git a/gfx/layers/composite/Diagnostics.h b/gfx/layers/composite/Diagnostics.h
new file mode 100644
index 0000000000..b348128a20
--- /dev/null
+++ b/gfx/layers/composite/Diagnostics.h
@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_gfx_layers_composite_Diagnostics_h
+#define mozilla_gfx_layers_composite_Diagnostics_h
+
+#include "mozilla/Maybe.h"
+#include <cstdint>
+
+namespace mozilla {
+namespace layers {
+
+// These statistics are collected by layers backends, preferably by the GPU
+struct GPUStats {
+  GPUStats() : mInvalidPixels(0), mScreenPixels(0), mPixelsFilled(0) {}
+
+  uint32_t mInvalidPixels;
+  uint32_t mScreenPixels;
+  uint32_t mPixelsFilled;
+  Maybe<float> mDrawTime;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // mozilla_gfx_layers_composite_Diagnostics_h