Index: cc/trees/clip_node.h |
diff --git a/cc/trees/clip_node.h b/cc/trees/clip_node.h |
index ca1156d12688a2365de72a7072c0f87c4f6c9a20..b81c72c235eb4775963127db161c0ec9dcdfa440 100644 |
--- a/cc/trees/clip_node.h |
+++ b/cc/trees/clip_node.h |
@@ -5,7 +5,10 @@ |
#ifndef CC_TREES_CLIP_NODE_H_ |
#define CC_TREES_CLIP_NODE_H_ |
+#include <memory> |
+ |
#include "cc/base/cc_export.h" |
+#include "cc/trees/clip_expander.h" |
#include "ui/gfx/geometry/rect_f.h" |
namespace base { |
@@ -20,6 +23,10 @@ struct CC_EXPORT ClipNode { |
ClipNode(); |
ClipNode(const ClipNode& other); |
+ ClipNode& operator=(const ClipNode& other); |
+ |
+ ~ClipNode(); |
+ |
// The node index of this node in the clip tree node vector. |
int id; |
// The node index of the parent node in the clip tree node vector. |
@@ -33,7 +40,15 @@ struct CC_EXPORT ClipNode { |
NONE, |
// The node contributes a new clip (that is, |clip| needs to be applied). |
- APPLIES_LOCAL_CLIP |
+ APPLIES_LOCAL_CLIP, |
+ |
+ // This node represents a space expansion. When computing visible rects, |
+ // the accumulated clip inherited by this node gets expanded. Similarly, |
+ // when mapping a rect in descendant space to the rect in ancestor space |
+ // that depends on the descendant rect's contents, this node expands the |
+ // descendant rect. This is used for effects like pixel-moving filters, |
+ // where clipped-out content can affect visible output. |
+ EXPANDS_CLIP |
}; |
ClipType clip_type; |
@@ -42,6 +57,9 @@ struct CC_EXPORT ClipNode { |
// transform node. |
gfx::RectF clip; |
+ // For nodes that expand, this represents the amount of expansion. |
+ std::unique_ptr<ClipExpander> clip_expander; |
+ |
// Clip nodes are used 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 |