static (Bmp bmp, bool valid) ShrinkToRect(Bmp bmp, Rectangle rect)
{
var newPixels = new BmpPixel[rect.Height, rect.Width];
for (var y = rect.Y; y < rect.Bottom; y++)
{
for (var x = rect.X; x < rect.Right; x++)
{
newPixels[y - rect.Y, x - rect.X] = bmp.Pixels[y, x];
}
}
return(BmpParser.FromPixels(newPixels), newPixels.Length != 0);
}
public void BmpFromPixels(string fileName)
{
var bytes = File.ReadAllBytes(fileName);
var bmpFromBytes = BmpParser.Parse(bytes);
var bmp = BmpParser.FromPixels(bmpFromBytes.Pixels, bmpFromBytes.InfoHeader.BitPerPixel);
bmp.InfoHeader.BitPerPixel = bmpFromBytes.InfoHeader.BitPerPixel;
var outbytes = bmp.GetFileBytes();
Assert.IsTrue(bytes.Length == outbytes.Length);
for (var i = 0; i < bytes.Length; i++)
{
Assert.AreEqual(bytes[i], outbytes[i]);
}
}