batch_manager.h

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/*
 * Copyright (c) 2010, Willow Garage, Inc.
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#ifndef RVE_RENDER_SERVER_BATCH_MANAGER_H
#define RVE_RENDER_SERVER_BATCH_MANAGER_H

#include <rve_common/uuid.h>
#include <map>

namespace Ogre
{
class SceneManager;
}

namespace rve_render_server
{

template<typename Child, typename Input, typename Renderer, typename Description>
class BatchManager
{
private:
  struct InputInfo
  {
    rve_common::UUID id;
    uint32_t internal_id;
    Renderer* renderer;
  };
  typedef std::map<rve_common::UUID, InputInfo> M_InputInfo;

public:
  BatchManager(Ogre::SceneManager* scene_manager)
  : scene_manager_(scene_manager)
  {

  }

  ~BatchManager()
  {
    typename M_DescToRenderer::iterator it = renderers_.begin();
    typename M_DescToRenderer::iterator end = renderers_.end();
    for (; it != end; ++it)
    {
      delete it->second;
    }

    renderers_.clear();
  }

  void add(const rve_common::UUID& id, const Input& input)
  {
    Renderer* renderer = getOrCreateRenderer(input);
    uint32_t internal_id = renderer->add(id, input);
    InputInfo info;
    info.id = id;
    info.internal_id = internal_id;
    info.renderer = renderer;
    input_to_renderer_[id] = info;
  }

  void remove(const rve_common::UUID& id)
  {
    typename M_InputInfo::iterator it = input_to_renderer_.find(id);

    const InputInfo& info = it->second;
    info.renderer->remove(info.internal_id);

    input_to_renderer_.erase(it);
  }

private:
  Renderer* getOrCreateRenderer(const Input& input)
  {
    Description desc = static_cast<Child*>(this)->createDescription(input);
    typename M_DescToRenderer::iterator it = renderers_.find(desc);
    if (it != renderers_.end())
    {
      return it->second;
    }

    Renderer* rend = new Renderer(scene_manager_, desc);

    renderers_.insert(std::make_pair(desc, rend));
    return rend;
  }

  M_InputInfo input_to_renderer_;

  typedef std::map<Description, Renderer*> M_DescToRenderer;
  M_DescToRenderer renderers_;

  Ogre::SceneManager* scene_manager_;
};

} // namespace rve_render_server

#endif // RVE_RENDER_SERVER_BATCH_MANAGER_H