Custom decoders for PNG files

Question

I've donwloaded an image from user manual (see attachment) and need to transform it. When I tried to load it via following code, I got the exception: "Image cannot be loaded. Available decoders:\r\n - JPEG : JpegDecoder\r\n - PNG : PngDecoder\r\n - GIF : GifDecoder\r\n - BMP : BmpDecoder\r\n". Is it possible to apply custom decoder and where can I found them?

using (var originalImage = new MemoryStream(...))
using (var image = Image.Load<Rgba32>(originalImage))
{

}

Answer 1

The linked image can be decoded using ImageSharp. As @tocsoft says in the comments it likely you forgot to reset your input stream position.

Here's the two images. The second we've loaded and flipped vertically using the following code:

using (var image = Image.Load(Path.Combine(inPath, "-7bH2hfA.png")))
{
    image.Mutate(x => x.Flip(FlipMode.Vertical));

    image.Save(Path.Combine(outPath, "-7bH2hfA-flipped.png"));
}

Your input image:

Our flipped output image:

EDIT

When I originally tested the image I used r-click save which gave me a valid png. I have since used the direct download from Dropbox which yields the original file.

It's not a png! It is, in fact, a webp file.