1 files changed, 46 insertions, 0 deletions
diff --git a/layout/style/LayerAnimationInfo.cpp b/layout/style/LayerAnimationInfo.cpp
new file mode 100644
index 0000000000..753838c439
--- /dev/null
+++ b/layout/style/LayerAnimationInfo.cpp
@@ -0,0 +1,46 @@
+/* -*- 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/. */
+
+#include "LayerAnimationInfo.h"
+
+#include "nsCSSProps.h"          // For nsCSSProps::PropHasFlags
+#include "nsCSSPropertyIDSet.h"  // For nsCSSPropertyIDSet::CompositorAnimatable
+
+namespace mozilla {
+
+/* static */ const Array<
+    DisplayItemType, nsCSSPropertyIDSet::CompositorAnimatableDisplayItemCount()>
+    LayerAnimationInfo::sDisplayItemTypes = {
+        DisplayItemType::TYPE_BACKGROUND_COLOR,
+        DisplayItemType::TYPE_OPACITY,
+        DisplayItemType::TYPE_TRANSFORM,
+};
+
+/* static */
+DisplayItemType LayerAnimationInfo::GetDisplayItemTypeForProperty(
+    nsCSSPropertyID aProperty) {
+  switch (aProperty) {
+    case eCSSProperty_background_color:
+      return DisplayItemType::TYPE_BACKGROUND_COLOR;
+    case eCSSProperty_opacity:
+      return DisplayItemType::TYPE_OPACITY;
+    case eCSSProperty_transform:
+    case eCSSProperty_translate:
+    case eCSSProperty_scale:
+    case eCSSProperty_rotate:
+    case eCSSProperty_offset_path:
+    case eCSSProperty_offset_distance:
+    case eCSSProperty_offset_rotate:
+    case eCSSProperty_offset_anchor:
+    case eCSSProperty_offset_position:
+      return DisplayItemType::TYPE_TRANSFORM;
+    default:
+      break;
+  }
+  return DisplayItemType::TYPE_ZERO;
+}
+
+}  // namespace mozilla