optional
primitive: GPUPrimitiveState
      
    optional
depthStencil: GPUDepthStencilState
      
    optional
multisample: GPUMultisampleState
      
    optional
fragment: GPUFragmentState
      
    
primitive: GPUPrimitiveState
      
    
depthStencil: GPUDepthStencilState
      
    
multisample: GPUMultisampleState
      
    
fragment: GPUFragmentState