b771908e5b
Add a PNG writer so the demos produce actual images. Two pieces: - src/jolt/png.janet — the encoder (8-bit RGB, filter None, stored/uncompressed DEFLATE so no compressor is needed; correct CRC32 + Adler32). It lives in Janet because per-byte work in the overlay is far too slow (a byte-array aset loop is ~30s for 360k bytes, and CRC32 over even a tiny image would be worse). Janet's bit ops are 32-bit signed, so the 32-bit-unsigned arithmetic is done with plain number ops (doubles hold 2^32) plus byte-level bxor. Exposed to the overlay as janet.png/* by importing it into eval_base's module-load-env. - src/jolt/jolt/png.clj — the jolt.png overlay wrapper: image / put! / write. The overlay only produces pixels; the host encodes them in one pass. mandelbrot gets a `render` subcommand (jolt -m mandelbrot render out.png [size]) that colours count-point's escape counts; the numeric-arg bench path is untouched. Verified end to end: macOS `sips` accepts the output (so CRC/zlib are valid). png-test covers the encoder structure (signature/IHDR/IEND) and the overlay round-trip. Co-authored-by: Yogthos <yogthos@gmail.com> |
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| .. | ||
| bench | ||
| clojure-stdlib/clojure | ||
| fixtures/cgen-build | ||
| integration | ||
| spec | ||
| support | ||
| unit | ||