public void AddCTest()
{
foreach (int bitsPerPixel in new[] { 1, 2, 4, 8, 16, 24, 32 })
{
foreach (int scaleFactor in new[] { 0, 1, -2 })
{
Image src = new Image((32 * 2) + 23, 43, bitsPerPixel, 200, 200);
src.Randomize();
Image copy = src.Clone(true);
switch (bitsPerPixel)
{
case 8:
{
Image dst1 = src.AddC(null, 23, scaleFactor);
Image dst2 = src.AddC(src, 23, scaleFactor);
Assert.IsTrue(src == dst2);
for (int y = 0; y < src.Height; y++)
{
for (int x = 0; x < src.Width; x++)
{
uint expected = (uint)Math.Min(255, (int)Math.Round(((int)copy.GetPixel(x, y) + 23) * Math.Pow(2, -scaleFactor), MidpointRounding.ToEven));
Assert.AreEqual(expected, dst1.GetPixel(x, y));
Assert.AreEqual(expected, dst2.GetPixel(x, y));
}
}
}
break;
case 24:
{
Color addcolor = Color.FromArgb(0, 12, 34, 56);
Image dst1 = src.AddC(null, addcolor.Argb, scaleFactor);
Image dst2 = src.AddC(src, addcolor.Argb, scaleFactor);
Assert.IsTrue(src == dst2);
for (int y = 0; y < src.Height; y++)
{
for (int x = 0; x < src.Width; x++)
{
Color source = Color.FromArgb(copy.GetPixel(x, y));
Color expected = Color.Add(source, addcolor, Math.Pow(2, -scaleFactor), MidpointRounding.ToEven);
Assert.AreEqual(expected.Argb, dst1.GetPixel(x, y));
Assert.AreEqual(expected.Argb, dst2.GetPixel(x, y));
}
}
}
break;
case 32:
{
Color addcolor = Color.FromArgb(23, 12, 34, 56);
Image dst1 = src.AddC(null, addcolor.Argb, scaleFactor);
Image dst2 = src.AddC(src, addcolor.Argb, scaleFactor);
Assert.IsTrue(src == dst2);
for (int y = 0; y < src.Height; y++)
{
for (int x = 0; x < src.Width; x++)
{
Color source = Color.FromArgb(copy.GetPixel(x, y));
Color expected = Color.Add(source, addcolor, Math.Pow(2, -scaleFactor), MidpointRounding.ToEven);
Assert.AreEqual(expected.Argb, dst1.GetPixel(x, y));
Assert.AreEqual(expected.Argb, dst2.GetPixel(x, y));
}
}
}
break;
default:
try
{
src.AddC(null, 23, scaleFactor);
Assert.Fail();
}
catch (NotSupportedException)
{
}
break;
}
}
}
}
