1 files changed, 64 insertions, 0 deletions
diff --git a/layout/painting/MaskLayerImageCache.cpp b/layout/painting/MaskLayerImageCache.cpp
new file mode 100644
index 0000000000..2b3b63dc57
--- /dev/null
+++ b/layout/painting/MaskLayerImageCache.cpp
@@ -0,0 +1,64 @@
+/* -*- 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 "MaskLayerImageCache.h"
+
+#include "ImageContainer.h"
+#include "mozilla/layers/KnowsCompositor.h"
+
+using namespace mozilla::layers;
+
+namespace mozilla {
+
+MaskLayerImageCache::MaskLayerImageCache() {
+  MOZ_COUNT_CTOR(MaskLayerImageCache);
+}
+MaskLayerImageCache::~MaskLayerImageCache() {
+  MOZ_COUNT_DTOR(MaskLayerImageCache);
+}
+
+void MaskLayerImageCache::Sweep() {
+  for (auto iter = mMaskImageContainers.Iter(); !iter.Done(); iter.Next()) {
+    const auto& key = iter.Get()->mKey;
+    if (key->HasZeroLayerCount()) {
+      iter.Remove();
+    }
+  }
+}
+
+ImageContainer* MaskLayerImageCache::FindImageFor(
+    const MaskLayerImageKey** aKey) {
+  if (MaskLayerImageEntry* entry = mMaskImageContainers.GetEntry(**aKey)) {
+    *aKey = entry->mKey.get();
+    return entry->mContainer;
+  }
+
+  return nullptr;
+}
+
+void MaskLayerImageCache::PutImage(const MaskLayerImageKey* aKey,
+                                   ImageContainer* aContainer) {
+  MaskLayerImageEntry* entry = mMaskImageContainers.PutEntry(*aKey);
+  entry->mContainer = aContainer;
+}
+
+MaskLayerImageCache::MaskLayerImageKey::MaskLayerImageKey()
+    : mRoundedClipRects(), mLayerCount(0) {
+  MOZ_COUNT_CTOR(MaskLayerImageKey);
+}
+
+MaskLayerImageCache::MaskLayerImageKey::MaskLayerImageKey(
+    const MaskLayerImageKey& aKey)
+    : mRoundedClipRects(aKey.mRoundedClipRects.Clone()),
+      mLayerCount(aKey.mLayerCount) {
+  MOZ_COUNT_CTOR(MaskLayerImageKey);
+}
+
+MaskLayerImageCache::MaskLayerImageKey::~MaskLayerImageKey() {
+  MOZ_COUNT_DTOR(MaskLayerImageKey);
+}
+
+}  // namespace mozilla