Shader parity

The WGSL in shaders/ against the CPU reference in crates/video, in this browser, on this GPU — an Apple IIe's composite monitor and an Apple IIgs's AppleColor RGB. The bar is |Δ| ≤ 2 per channel per pixel; the exact-match rate is beside it because that is what would go first.

Asking for a GPU.

Cases that were not bit-identical

By output size

What a frame costs

The verdict, for a machine to read