1 files changed, 96 insertions, 0 deletions
diff --git a/gfx/gl/GfxTexturesReporter.h b/gfx/gl/GfxTexturesReporter.h
new file mode 100644
index 0000000000..077fc0e879
--- /dev/null
+++ b/gfx/gl/GfxTexturesReporter.h
@@ -0,0 +1,96 @@
+/* -*- 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 GFXTEXTURESREPORTER_H_
+#define GFXTEXTURESREPORTER_H_
+
+#include "mozilla/Atomics.h"
+#include "nsIMemoryReporter.h"
+#include "GLTypes.h"
+
+namespace mozilla {
+namespace gl {
+
+class GfxTexturesReporter final : public nsIMemoryReporter {
+  ~GfxTexturesReporter() = default;
+
+ public:
+  NS_DECL_ISUPPORTS
+
+  GfxTexturesReporter() {
+#ifdef DEBUG
+    // There must be only one instance of this class, due to |sAmount|
+    // being static.  Assert this.
+    static bool hasRun = false;
+    MOZ_ASSERT(!hasRun);
+    hasRun = true;
+#endif
+  }
+
+  enum MemoryUse {
+    // when memory being allocated is reported to a memory reporter
+    MemoryAllocated,
+    // when memory being freed is reported to a memory reporter
+    MemoryFreed
+  };
+
+  // When memory is used/freed for tile textures, call this method to update
+  // the value reported by this memory reporter.
+  static void UpdateAmount(MemoryUse action, size_t amount);
+
+  static void UpdateWasteAmount(size_t delta) { sTileWasteAmount += delta; }
+
+  NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
+                            nsISupports* aData, bool aAnonymize) override {
+    MOZ_COLLECT_REPORT(
+        "gfx-tiles-waste", KIND_OTHER, UNITS_BYTES, int64_t(sTileWasteAmount),
+        "Memory lost due to tiles extending past content boundaries");
+
+    MOZ_COLLECT_REPORT("gfx-textures", KIND_OTHER, UNITS_BYTES,
+                       int64_t(sAmount),
+                       "Memory used for storing GL textures.");
+
+    MOZ_COLLECT_REPORT("gfx-textures-peak", KIND_OTHER, UNITS_BYTES,
+                       int64_t(sPeakAmount),
+                       "Peak memory used for storing GL textures.");
+
+    return NS_OK;
+  }
+
+ private:
+  static Atomic<size_t> sAmount;
+  static Atomic<size_t> sPeakAmount;
+  // Count the amount of memory lost to tile waste
+  static Atomic<size_t> sTileWasteAmount;
+};
+
+class GfxTextureWasteTracker {
+ public:
+  GfxTextureWasteTracker() : mBytes(0) {
+    MOZ_COUNT_CTOR(GfxTextureWasteTracker);
+  }
+
+  void Update(int32_t aPixelArea, int32_t aBytesPerPixel) {
+    GfxTexturesReporter::UpdateWasteAmount(-mBytes);
+    mBytes = aPixelArea * aBytesPerPixel;
+    GfxTexturesReporter::UpdateWasteAmount(mBytes);
+  }
+
+  ~GfxTextureWasteTracker() {
+    GfxTexturesReporter::UpdateWasteAmount(-mBytes);
+    MOZ_COUNT_DTOR(GfxTextureWasteTracker);
+  }
+
+ private:
+  GfxTextureWasteTracker(const GfxTextureWasteTracker& aRef);
+
+  int32_t mBytes;
+};
+
+}  // namespace gl
+}  // namespace mozilla
+
+#endif  // GFXTEXTURESREPORTER_H_