/// <summary>
/// Take a screenshot of the host framebuffer.
/// </summary>
/// <returns>Hash of the screenshot.</returns>
public static unsafe string TakeScreenshot()
{
int w = (int)Engine.Host.Size.X;
int h = (int)Engine.Host.Size.Y;
byte[] pixels = new byte[3 * w * h];
// Read the pixels.
GLThread.ExecuteGLThread(() =>
{
Engine.GraphicsManager.CheckError("before screenshot");
fixed(byte *pixel = &pixels[0])
{
Gl.ReadPixels(0, 0, w, h, PixelFormat.Bgr, PixelType.UnsignedByte, new IntPtr(pixel));
}
Engine.GraphicsManager.CheckError("after screenshot");
});
// Compute the hash.
string hash = Convert.ToBase64String(new SHA256Managed().ComputeHash(pixels));
// Save the file.
FIBITMAP image = FreeImage.ConvertFromRawBitsArray(pixels, w, h, w * 3, 24, 0, 0, 0, false);
FreeImage.Save(FREE_IMAGE_FORMAT.FIF_PNG, image,
$".{Path.DirectorySeparatorChar}ReferenceImages{Path.DirectorySeparatorChar}{_id} ~ {hash.Replace("+", "_").Replace("/", "-").Replace("=", " ")}.png",
FREE_IMAGE_SAVE_FLAGS.DEFAULT);
_id++;
// Check if the hash is an alternative.
if (_alternativeHashes.ContainsKey(hash))
{
return(_alternativeHashes[hash]);
}
// Return hash.
return(hash);
}