text: //
  // Copyright 2016 Pixar
  //
  // Licensed under the Apache License, Version 2.0 (the "Apache License")
  // with the following modification; you may not use this file except in
  // compliance with the Apache License and the following modification to it:
  // Section 6. Trademarks. is deleted and replaced with:
  //
  // 6. Trademarks. This License does not grant permission to use the trade
  //    names, trademarks, service marks, or product names of the Licensor
  //    and its affiliates, except as required to comply with Section 4(c) of
  //    the License and to reproduce the content of the NOTICE file.
  //
  // You may obtain a copy of the Apache License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the Apache License with the above modification is
  // distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied. See the Apache License for the specific
  // language governing permissions and limitations under the Apache License.
  //
  #include "pxr/imaging/hdSt/drawItem.h"
  #include "pxr/imaging/hdSt/materialNetworkShader.h"
  
  PXR_NAMESPACE_OPEN_SCOPE
  
  HdStDrawItem::HdStDrawItem(HdRprimSharedData const *sharedData)
      : HdDrawItem(sharedData)
  {
      HF_MALLOC_TAG_FUNCTION();
  }
  
  HdStDrawItem::~HdStDrawItem()
  {
      /*NOTHING*/
  }
  
  /*virtual*/
  size_t
  HdStDrawItem::_GetBufferArraysHash() const
  {
      if (const HdStShaderCodeSharedPtr& shader = GetMaterialNetworkShader()) {
          if (const HdBufferArrayRangeSharedPtr& shaderBAR =
              shader->GetShaderData()) {
              return shaderBAR->GetVersion();
          }
      }
      
      return 0;
  }
  
  /*virtual*/
  size_t
  HdStDrawItem::_GetElementOffsetsHash() const
  {
      if (const HdStShaderCodeSharedPtr& shader = GetMaterialNetworkShader()) {
          if (const HdBufferArrayRangeSharedPtr& shaderBAR =
                  shader->GetShaderData()) {
              return shaderBAR->GetElementOffset();
          }
      }
      
      return 0;
  }
  
  PXR_NAMESPACE_CLOSE_SCOPE
  
  