Qoi.NetStandard 1.0.0

Qoi.NetStandard

This is an implementation of QOI format (https://github.com/phoboslab/qoi) written in .Net Standard 2.0 and therefore compatible with all modern versions of .Net, including .Net Framework 4.6.1+, Net Core 2.0+, NET 5, NET 6, and Xamarin (iOS 10.14+ and Android 8.0+).

Sample usage

Decoding a .qoi image

From a file:

// Decode a .qoi image from a file
byte[] colorBytes = Qoi.NetStandard.QoiEncoder.DecodeQoi(fileName, out Qoi.NetStandard.QoiHeader header);
// THAT'S ALL!

// Now you can use the decoded pixels to create an 
// image that can be displayed anywhere
Bitmap image = BitmapFromPixels(colorBytes, header);
pictureBox1.BackgroundImage = image;

Alternatively you can decode from streams or from bytes array.

From a stream:

// Decode a .qoi image from a stream
byte[] colorBytes = Qoi.NetStandard.QoiEncoder.DecodeQoi(stream, out Qoi.NetStandard.QoiHeader header);
...

From a bytes array:

// Decode a .qoi image from a bytes array
byte[] colorBytes = Qoi.NetStandard.QoiEncoder.DecodeQoi(qoiFileByes, out Qoi.NetStandard.QoiHeader header);
...

Encoding a .qoi image

The main thing to take into account is that [decodedBytes] are the actual bytes of the image, so the (A)RGB information, not the bytes of the image file itself.

byte[] qoiFileBytes = Qoi.NetStandard.QoiEncoder.EncodeToQoi(pngImage.Width,
    pngImage.Height,
    decodedBytes,
    hasAlpha,
    linearAlpha);
// THAT'S ALL!

// You can now write all these bytes as a .qoi file.
File.WriteAllBytes("myQoiImage.qoi", qoiFileBytes);
...

List of compatible .Net implementations: