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       is_clipped_(false),
  17       contributes_to_drawn_surface_(false),
  18       nearest_occlusion_immune_ancestor_(nullptr) {
  19 }
  20
  21 RenderSurface::~RenderSurface() {
  22   for (size_t i = 0; i < layer_list_.size(); ++i) {
  23     DCHECK(!layer_list_.at(i)->render_surface()) <<
  24         "RenderSurfaces should be cleared from the contributing layers " <<
  25         "before destroying this surface to avoid leaking a circular " <<
  26         "reference on the contributing layer. Probably the " <<
  27         "RenderSurfaceLayerList should just be destroyed before destroying " <<
  28         "any RenderSurfaces on layers.";
  29   }
  30 }
  31
  32 gfx::RectF RenderSurface::DrawableContentRect() const {
  33   gfx::RectF drawable_content_rect =
  34       MathUtil::MapClippedRect(draw_transform_, content_rect_);
  35   if (owning_layer_->has_replica())
  36     drawable_content_rect.Union(
  37         MathUtil::MapClippedRect(replica_draw_transform_, content_rect_));
  38   return drawable_content_rect;
  39 }
  40
  41 void RenderSurface::ClearLayerLists() {
  42   layer_list_.clear();
  43 }
  44
  45 }  // namespace cc