interface GPURenderPipelineDescriptor
optional
primitive: GPUPrimitiveStateoptional
depthStencil: GPUDepthStencilStateoptional
multisample: GPUMultisampleStateoptional
fragment: GPUFragmentStateprimitive: GPUPrimitiveStatedepthStencil: GPUDepthStencilStatemultisample: GPUMultisampleStatefragment: GPUFragmentState