Splitting of layers for correct intersections

cc/output/bsp_walk_action.cc

 // Copyright 2014 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 "cc/output/bsp_walk_action.h"
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/output/direct_renderer.h"
 #include "cc/quads/draw_polygon.h"
+#include "cc/quads/draw_quad.h"
 
 namespace cc {
 
-void BspWalkActionToVector::operator()(DrawPolygon* item) {
-  list_->push_back(item);
+BspWalkActionDrawPolygon::BspWalkActionDrawPolygon(
+    DirectRenderer* renderer,
+    DirectRenderer::DrawingFrame* frame,
+    const gfx::Rect& render_pass_scissor,
+    bool using_scissor_as_optimization)
+    : renderer_(renderer),
+      frame_(frame),
+      render_pass_scissor_(render_pass_scissor),
+      using_scissor_as_optimization_(using_scissor_as_optimization) {
+}
+
+void BspWalkActionDrawPolygon::operator()(DrawPolygon* item) {
+  gfx::Transform inverse_transform;
+  if (item->original_ref()->quadTransform().GetInverse(&inverse_transform)) {

[enne (OOO), 2015/02/04 21:23:59]

Isn't it true that we don't draw things that don't have an inverse? If so,
should this be a dcheck?

[awoloszyn, 2015/02/12 16:48:51]

Done.

+    item->TransformToLayerSpace(inverse_transform);
+    renderer_->DoDrawPolygon(*item, frame_, render_pass_scissor_,
+                             using_scissor_as_optimization_);
+  }
 }
 
 BspWalkActionToVector::BspWalkActionToVector(std::vector<DrawPolygon*>* in_list)
     : list_(in_list) {
 }
 
+void BspWalkActionToVector::operator()(DrawPolygon* item) {
+  list_->push_back(item);
+}
+
 }  // namespace cc