text: 
  //
  // This source file is part of appleseed.
  // Visit http://appleseedhq.net/ for additional information and resources.
  //
  // This software is released under the MIT license.
  //
  // Copyright (c) 2010-2013 Francois Beaune, Jupiter Jazz Limited
  // Copyright (c) 2014-2016 Francois Beaune, The appleseedhq Organization
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  
  #ifndef APPLESEED_RENDERER_KERNEL_AOV_TILESTACK_H
  #define APPLESEED_RENDERER_KERNEL_AOV_TILESTACK_H
  
  // appleseed.renderer headers.
  #include "renderer/kernel/aov/aovsettings.h"
  
  // appleseed.foundation headers.
  #include "foundation/image/color.h"
  #include "foundation/image/tile.h"
  
  // Standard headers.
  #include <cassert>
  #include <cstddef>
  
  namespace renderer
  {
  
  //
  // A small array of image tiles.
  //
  
  class TileStack
  {
    public:
      TileStack();
      TileStack(const TileStack& rhs);
  
      void append(foundation::Tile* tile);
  
      void set_pixel(
         const size_t                 x,
         const size_t                 y,
         const size_t                 i,
         const foundation::Color4f&   color) const;
  
    private:
      foundation::Tile*   m_tiles[MaxAOVCount];
      size_t              m_size;
  };
  
  
  //
  // TileStack class implementation.
  //
  
  inline TileStack::TileStack()
    : m_size(0)
  {
  }
  
  inline TileStack::TileStack(const TileStack& rhs)
    : m_size(rhs.m_size)
  {
      for (size_t i = 0; i < m_size; ++i)
          m_tiles[i] = rhs.m_tiles[i];
  }
  
  inline void TileStack::append(foundation::Tile* tile)
  {
      assert(m_size < MaxAOVCount);
      m_tiles[m_size++] = tile;
  }
  
  inline void TileStack::set_pixel(
      const size_t                x,
      const size_t                y,
      const size_t                i,
      const foundation::Color4f&  color) const
  {
      m_tiles[i]->set_pixel(x, y, color);
  }
  
  }       // namespace renderer
  
  #endif  // !APPLESEED_RENDERER_KERNEL_AOV_TILESTACK_H
  