AnyBitmap.FromFile() on a 24bpp file will return a bitmap with the wrong encoding.

[chipego-ironsoftware]

Description

When using the AnyBitmap.FromFile() method on a 24bpp file, the returned bitmap has the correct properties BitsPerPixel=24 and Stride=2564 (approximately width * 3). However, upon inspecting the Scan0 data, it appears to contain unexpected alpha data in the pattern of X Y Z 255 X Y Z 255 which is 32bpp with an alpha channel.

To Reproduce

• Use the AnyBitmap.FromFile() method to load a 24bpp file.
• Inspect the properties of the returned bitmap, specifically BitsPerPixel and Stride.
• Examine the Scan0 data of the bitmap.

Workaround

public static AnyBitmap BitmapFromFile(string path)
  {
   AnyBitmap img = AnyBitmap.FromFile(path);
   return new AnyBitmap(img, img.Width, img.Height);
  }

Test Image

This is a 24bpp image provided for the purpose of reproduction.