public void Given1PixelBitmap_Returns1PixelBitmap()
{
var bitmap = new Bitmap(1, 1);
var result = bitmap.RGBADownSample();
Assert.That(result.Width, Is.EqualTo(1));
Assert.That(result.Height, Is.EqualTo(1));
}
public void Given1PixelBitmap_ReturnsSamePixel()
{
var bitmap = new Bitmap(1, 1);
bitmap.SetPixel(0,0, Color.FromArgb(128, 255, 255, 255));
var result = bitmap.RGBADownSample();
Assert.That(result.GetPixel(0, 0).A, Is.EqualTo(bitmap.GetPixel(0, 0).A));
}
public void Given2x2PixelBitmap_ReturnsAverage()
{
var bitmap = new Bitmap(2, 2);
bitmap.SetPixel(0, 0, Color.FromArgb(0, 255, 255, 255));
bitmap.SetPixel(0, 1, Color.FromArgb(63, 255, 255, 255));
bitmap.SetPixel(1, 0, Color.FromArgb(127, 255, 255, 255));
bitmap.SetPixel(1, 1, Color.FromArgb(191, 255, 255, 255));
var result = bitmap.RGBADownSample();
Assert.That(result.GetPixel(0, 0).A, Is.EqualTo(95));
}