cc/layers/render_surface.cc

   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
  11 namespace cc {
  12
  13 RenderSurface::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_(nullptr) {
  22 }
  23
  24 RenderSurface::~RenderSurface() {
  25   for (size_t i = 0; i < layer_list_.size(); ++i) {
  26     DCHECK(!layer_list_.at(i)->render_surface()) <<
  27         "RenderSurfaces should be cleared from the contributing layers " <<
  28         "before destroying this surface to avoid leaking a circular " <<
  29         "reference on the contributing layer. Probably the " <<
  30         "RenderSurfaceLayerList should just be destroyed before destroying " <<
  31         "any RenderSurfaces on layers.";
  32   }
  33 }
  34
  35 gfx::RectF RenderSurface::DrawableContentRect() const {
  36   gfx::RectF drawable_content_rect =
  37       MathUtil::MapClippedRect(draw_transform_, content_rect_);
  38   if (owning_layer_->has_replica())
  39     drawable_content_rect.Union(
  40         MathUtil::MapClippedRect(replica_draw_transform_, content_rect_));
  41   return drawable_content_rect;
  42 }
  43
  44 void RenderSurface::ClearLayerLists() {
  45   layer_list_.clear();
  46 }
  47
  48 }  // namespace cc