/*
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 * modification, are permitted provided that the following conditions are
 * met:
 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// This file contains the definition of DrawElement.

#include "core/cross/precompile.h"
#include "core/cross/draw_element.h"
#include "core/cross/renderer.h"
#include "core/cross/error.h"

namespace o3d {

O3D_DEFN_CLASS(DrawElement, ParamObject);

const char* DrawElement::kMaterialParamName =
    O3D_STRING_CONSTANT("material");

ObjectBase::Ref DrawElement::Create(ServiceLocator* service_locator) {
  Renderer* renderer = service_locator->GetService<Renderer>();
  if (NULL == renderer) {
    O3D_ERROR(service_locator) << "No Render Device Available";
    return ObjectBase::Ref();
  }

  return ObjectBase::Ref(renderer->CreateDrawElement());
}

DrawElement::DrawElement(ServiceLocator* service_locator)
    : ParamObject(service_locator),
      owner_(NULL) {
  RegisterParamRef(kMaterialParamName, &material_param_ref_);
}

DrawElement::~DrawElement() {
}

void DrawElement::SetOwner(Element* new_owner) {
  // Hold a ref to ourselves so we make sure we don't get deleted while
  // as we remove ourself from our current owner.
  DrawElement::Ref temp(this);

  if (owner_ != NULL) {
    bool removed = owner_->RemoveDrawElement(this);
    DLOG_ASSERT(removed);
  }

  owner_ = new_owner;

  if (new_owner) {
    new_owner->AddDrawElement(this);
  }
}
}  // namespace o3d
