ContextProvider in OutputSurface

webkit/common/gpu/managed_memory_policy_convert.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/common/gpu/managed_memory_policy_convert.h"
+
+namespace webkit {
+namespace gpu {
+
+static cc::ManagedMemoryPolicy::PriorityCutoff ConvertPriorityCutoff(
+    WebKit::WebGraphicsMemoryAllocation::PriorityCutoff priority_cutoff) {
+  // This is simple a 1:1 map, the names differ only because the WebKit names
+  // should be to match the cc names.
+  switch (priority_cutoff) {
+    case WebKit::WebGraphicsMemoryAllocation::PriorityCutoffAllowNothing:
+      return cc::ManagedMemoryPolicy::CUTOFF_ALLOW_NOTHING;
+    case WebKit::WebGraphicsMemoryAllocation::PriorityCutoffAllowVisibleOnly:
+      return cc::ManagedMemoryPolicy::CUTOFF_ALLOW_REQUIRED_ONLY;
+    case WebKit::WebGraphicsMemoryAllocation::
+        PriorityCutoffAllowVisibleAndNearby:
+      return cc::ManagedMemoryPolicy::CUTOFF_ALLOW_NICE_TO_HAVE;
+    case WebKit::WebGraphicsMemoryAllocation::PriorityCutoffAllowEverything:
+      return cc::ManagedMemoryPolicy::CUTOFF_ALLOW_EVERYTHING;
+  }
+  NOTREACHED();
+  return cc::ManagedMemoryPolicy::CUTOFF_ALLOW_NOTHING;
+}
+
+// static
+cc::ManagedMemoryPolicy ManagedMemoryPolicyConvert::Convert(
+    const WebKit::WebGraphicsMemoryAllocation& allocation,
+    bool* discard_backbuffer_when_not_visible) {
+  *discard_backbuffer_when_not_visible = !allocation.suggestHaveBackbuffer;
+  return cc::ManagedMemoryPolicy(
+      allocation.bytesLimitWhenVisible,
+      ConvertPriorityCutoff(allocation.priorityCutoffWhenVisible),
+      allocation.bytesLimitWhenNotVisible,
+      ConvertPriorityCutoff(allocation.priorityCutoffWhenNotVisible),
+      cc::ManagedMemoryPolicy::kDefaultNumResourcesLimit);
+}
+
+}  // namespace gpu
+}  // namespace webkit