GreenPng

Fastest PNG decoder for .NET designed to be blazingly fast and memory efficient.

It is focused on decoding 8-bit-per-channel images to little-endian BGRA format (like VK_FORMAT_B8G8R8A8_SRGB or SDL_PIXELFORMAT_ARGB8888).

Comparsion

Project	Speed	Memory efficiency	Free license
GreenPng	⚡	🟢	✅
StbImageSharp	💡	🟡	✅
Magick.NET	❄️	🟡	✅
SixLabors.ImageSharp	💡	🟡	❌

Format support

Type	1, 2, 4 bit	8 bit	16 bit
Greyscale	✅	✅	❌
Truecolor		✅	❌
Indexed	✅	✅	❌
Indexed (with transparency)	✅	✅	❌
Greyscale with alpha		✅	❌
Truecolor with alpha		✅	❌

How to use

Installing from NuGet

dotnet add package GreenPng

Easy use

byte[] image = PngDecoder.Decode(pngFileData, out PngHeader header);

int width = header.Width;
int height = header.Height;

More advanced way

bool ok = PngDecoder.TryDecodeHeader(pngFileData, out PngHeader header);

ok = PngDecoder.IsHeaderSupported(header);

byte[] image = new byte[header.ByteSize];

ok = PngDecoder.TryDecode(pngFileData, header, image);

Not supported

• Interlacing
• 16 bit
• Unusual chunks
• War

Git Workspace

This is workspace of Git Workspace paradigm.
Main component: GreenPng
Components:

• GreenPng
• GreenBuf