Index: third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.cpp |
diff --git a/third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.cpp b/third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b65fe9cda15ea3dc3ceed9862d8f05e95dd00bcc |
--- /dev/null |
+++ b/third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.cpp |
@@ -0,0 +1,56 @@ |
+// Copyright 2017 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 "platform/graphics/paint/GeometryMapperClipCache.h" |
+ |
+#include "platform/graphics/paint/FloatClipRect.h" |
+ |
+namespace blink { |
+ |
+// All clip caches invalidate themselves by tracking a local cache generation, |
+// and invalidating their cache if their cache generation disagrees with |
+// s_clipCacheGeneration. |
+static unsigned s_clipCacheGeneration = 0; |
+ |
+void GeometryMapperClipCache::clearCache() { |
+ s_clipCacheGeneration++; |
+} |
+ |
+Vector<GeometryMapperClipCache::ClipCacheEntry>* |
+GeometryMapperClipCache::getClipCacheEntries() { |
+ if (m_cacheGeneration != s_clipCacheGeneration || !m_clipCache) { |
+ m_clipCache.reset(new Vector<ClipCacheEntry>); |
+ m_cacheGeneration = s_clipCacheGeneration; |
+ } |
+ |
+ return m_clipCache.get(); |
+} |
+ |
+const FloatClipRect* GeometryMapperClipCache::getCachedClip( |
+ const ClipAndTransform& clipAndTransform) { |
+ auto* clipCacheEntries = |
+ const_cast<GeometryMapperClipCache*>(this)->getClipCacheEntries(); |
+ for (const auto& entry : *clipCacheEntries) { |
+ if (entry.clipAndTransform == clipAndTransform) { |
+ return &entry.clipRect; |
+ } |
+ } |
+ return nullptr; |
+} |
+ |
+void GeometryMapperClipCache::setCachedClip( |
+ const ClipAndTransform& clipAndTransform, |
+ const FloatClipRect& clip) { |
+ auto* clipCacheEntries = |
+ const_cast<GeometryMapperClipCache*>(this)->getClipCacheEntries(); |
+#if DCHECK_IS_ON |
pdr.
2017/03/08 02:34:55
DCHECK_IS_ON()
chrishtr
2017/03/08 02:59:28
Done.
|
+ for (const auto& entry : clipCachEntries) { |
+ if (entry.clipAndTransform == clipAndTransform) |
+ DCHECK(false); // There should be no existing entry. |
+ } |
+#endif |
+ clipCacheEntries->push_back(ClipCacheEntry(clipAndTransform, clip)); |
+} |
+ |
+} // namespace blink |