Convert HEIC to PNG programatically using System.Drawing.Common.Bitmap

heic-to-png-using-bitmap.cs

// Open the HEIC file named "filename.heic" in read mode using FileStream.
using (var fs = new FileStream("filename.heic", FileMode.Open))
{
    // Load the HEIC image from the file stream into a HeicImage object.
    HeicImage image = HeicImage.Load(fs);
    
    // Extract the pixel data from the HEIC image in the ARGB32 format, storing it in an int array.
    var pixels = image.GetInt32Array(Heic.Decoder.PixelFormat.Argb32);
    // Retrieve the width and height of the HEIC image.
    var width = (int)image.Width;
    var height = (int)image.Height;
    var i = 0;
    
    // Create a Bitmap object with the specified width, and height.
    Bitmap myBitmap = new Bitmap(width, height);
    // Set pixel data for each pixel of the bitmap.
    for (int y = 0; y < height; y++)
        for (int x = 0; x < width; x++)
            myBitmap.SetPixel(x, y, Color.FromArgb(pixels[i++]));
    
    // Save the encoded image to the file stream.
    myBitmap.Save("output.png");
}