SharpAstro.Png
Pure-managed PNG encoder + decoder for .NET. Writer: adaptive per-row filter selection (libpng "minimum sum of absolute values" heuristic), 8/16-bit RGBA/Gray. Reader: chunk parsing with CRC validation, color types 0/2/4/6 at 8/16-bit. Both sides handle iCCP / sRGB / gAMA / cHRM / eXIf metadata plus PNG-3 HDR signaling chunks cICP (Coding-Independent Code Points), mDCv (Mastering Display Color Volume), cLLI (Content Light Level Info) — full HDR10 / HLG round-trip. Also exports PngPredictor as a reusable row-unfilter building block (TIFF Predictor=2 / PDF FlateDecode). AOT-compatible.
Install
dotnet add package SharpAstro.Png --version 3.14.871+43ac2412bbc86a491c7bc41d48c6828f0b8af1f1
Install-Package SharpAstro.Png -Version 3.14.871+43ac2412bbc86a491c7bc41d48c6828f0b8af1f1
<PackageReference Include="SharpAstro.Png" Version="3.14.871+43ac2412bbc86a491c7bc41d48c6828f0b8af1f1" />
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Dependencies
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