render_surface.cc revision f2477e01787aa58f445919b809d89e252beef54f 
1// Copyright 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "cc/layers/render_surface.h"
6
7#include "cc/base/math_util.h"
8#include "cc/layers/layer.h"
9#include "ui/gfx/transform.h"
10
11namespace cc {
12
13RenderSurface::RenderSurface(Layer* owning_layer)
14    : owning_layer_(owning_layer),
15      draw_opacity_(1),
16      draw_opacity_is_animating_(false),
17      target_surface_transforms_are_animating_(false),
18      screen_space_transforms_are_animating_(false),
19      is_clipped_(false),
20      contributes_to_drawn_surface_(false),
21      nearest_occlusion_immune_ancestor_(NULL) {}
22
23RenderSurface::~RenderSurface() {
24  for (size_t i = 0; i < layer_list_.size(); ++i) {
25    DCHECK(!layer_list_.at(i)->render_surface()) <<
26        "RenderSurfaces should be cleared from the contributing layers " <<
27        "before destroying this surface to avoid leaking a circular " <<
28        "reference on the contributing layer. Probably the " <<
29        "RenderSurfaceLayerList should just be destroyed before destroying " <<
30        "any RenderSurfaces on layers.";
31  }
32}
33
34gfx::RectF RenderSurface::DrawableContentRect() const {
35  gfx::RectF drawable_content_rect =
36      MathUtil::MapClippedRect(draw_transform_, content_rect_);
37  if (owning_layer_->has_replica())
38    drawable_content_rect.Union(
39        MathUtil::MapClippedRect(replica_draw_transform_, content_rect_));
40  return drawable_content_rect;
41}
42
43}  // namespace cc
44