33664ed5e0
A minimal truecolor PNG encoder over Chez bytevectors — CRC-32 / Adler-32 framing with DEFLATE "stored" blocks, so there's no compressor to carry. Restores the jolt.png built-in (image/put!/write) the old host provided; def-var!'d into the jolt.png namespace and loaded in the CLI before the loader's baked-namespace snapshot, so (require '[jolt.png]) resolves with no source file. Output verified to decode as a valid PNG (signature, IHDR, CRC-correct chunks, inflatable IDAT). |
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