Index: cc/trees/clip_node.h |
diff --git a/cc/trees/clip_node.h b/cc/trees/clip_node.h |
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+// Copyright 2016 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. |
+ |
+#ifndef CC_TREES_CLIP_NODE_H_ |
+#define CC_TREES_CLIP_NODE_H_ |
+ |
+#include "cc/base/cc_export.h" |
+#include "ui/gfx/geometry/rect_f.h" |
+ |
+namespace base { |
+namespace trace_event { |
+class TracedValue; |
+} // namespace trace_event |
+} // namespace base |
+ |
+namespace cc { |
+ |
+namespace proto { |
+class TreeNode; |
+} // namespace proto |
+ |
+struct CC_EXPORT ClipNode { |
+ ClipNode(); |
+ ClipNode(const ClipNode& other); |
+ |
+ int id; |
+ int parent_id; |
+ int owner_id; |
+ |
+ // The clip rect that this node contributes, expressed in the space of its |
+ // transform node. |
+ gfx::RectF clip; |
+ |
+ // Clip nodes are uses for two reasons. First, they are used for determining |
+ // which parts of each layer are visible. Second, they are used for |
+ // determining whether a clip needs to be applied when drawing a layer, and if |
+ // so, the rect that needs to be used. These can be different since not all |
+ // clips need to be applied directly to each layer. For example, a layer is |
+ // implicitly clipped by the bounds of its target render surface and by clips |
+ // applied to this surface. |combined_clip_in_target_space| is used for |
+ // computing visible rects, and |clip_in_target_space| is used for computing |
+ // clips applied at draw time. Both rects are expressed in the space of the |
+ // target transform node, and may include clips contributed by ancestors. |
+ gfx::RectF combined_clip_in_target_space; |
+ gfx::RectF clip_in_target_space; |
+ |
+ // The id of the transform node that defines the clip node's local space. |
+ int transform_id; |
+ |
+ // The id of the transform node that defines the clip node's target space. |
+ int target_id; |
+ |
+ // Whether this node contributes a new clip (that is, whether |clip| needs to |
+ // be applied), rather than only inheriting ancestor clips. |
+ bool applies_local_clip : 1; |
+ |
+ // When true, |clip_in_target_space| does not include clips from ancestor |
+ // nodes. |
+ bool layer_clipping_uses_only_local_clip : 1; |
+ |
+ // True if target surface needs to be drawn with a clip applied. |
+ bool target_is_clipped : 1; |
+ |
+ // True if layers with this clip tree node need to be drawn with a clip |
+ // applied. |
+ bool layers_are_clipped : 1; |
+ bool layers_are_clipped_when_surfaces_disabled : 1; |
+ |
+ // Nodes that correspond to unclipped surfaces disregard ancestor clips. |
+ bool resets_clip : 1; |
+ |
+ bool operator==(const ClipNode& other) const; |
+ |
+ void ToProtobuf(proto::TreeNode* proto) const; |
+ void FromProtobuf(const proto::TreeNode& proto); |
+ void AsValueInto(base::trace_event::TracedValue* value) const; |
+}; |
+ |
+} // namespace cc |
+ |
+#endif // CC_TREES_CLIP_NODE_H_ |