Real-World Examples

Start with complete, compiled call chains adapted from real crates in zen/:

• zenfilters: image-plane scaling — generated contexts, array chunks and scalar tail.
• zenblend: SrcOver — a generated caller and a reusable generic backend helper.
• zenwebp: add-green — the actual scalar-unrolled integer body inside generated contexts.
• linear-srgb: gamma decoding — vector approximation and scalar tail, with their accuracy distinction.

Each page gives a pinned source revision, the production call chain, and any adaptations required to make the excerpt standalone. Rust fences are compiled directly by xtask/check_docs.py; the existing magetypes/tests/doc_examples.rs adds numerical regression cases.

• Generic types and const modes — zenanalyze, zenavif, and zenpixels-convert specialization.
• Production codec and filter walkthroughs — convolution, blur, quantization, and color conversion in one place.
• Coverage and suspicious gaps — what actual zen usage supports, and what it does not.