richer wesl-test: ideas from amberscript

[mighdoll]

amberscript has a rich declarative language for shader tests. Far beyond what wesl-test can do so far..

What ideas can/should we adapt for wesl-test?

Some amberscript of note:

• declarative buffer initalizers:

    BUFFER myData DATA_TYPE float DATA 1.0 2.0 3.0 4.0 END                                
  

• A rich set of comparators for numeric values:
  EXPECT LT, EXPECT LE, EXPECT EQ, etc.

• Buffer comparisions

  EXPECT buf1 RMSE_BUFFER buf2 TOLERANCE 0.01
  

• Buffer copying, clearing

  CLEAR pipeline                                                                        
  COPY buf1 TO buf2                                                                     
  

• earth mover distance metrics for image snapshot comparisons

• Probes to check particular values or regions in buffers and images

  EXPECT kImgBuffer IDX 0 0 SIZE 127 127 EQ_RGB 255 0 0
  EXPECT kComputeBuffer IDX 524280 EQ 255 255
  

• Declarative pipelines

  PIPELINE compute kComputePipeline
    ATTACH kComputeShader
    BIND BUFFER kComputeBuffer AS storage DESCRIPTOR_SET 0 BINDING 3
  END  # pipeline
  

• Run pipelines, expiclity and repeatedly

  REPEAT 10
    RUN pipeline1 10 1 1
    RUN pipeline2 2 1 1
  END