public void ConstructFrom_Vector4()
{
var source = new Vector4(0f, 0.2f, 0.5f, 1f);
Rgba64 expected = default;
expected.FromScaledVector4(source);
var actual = new Rgba64(source);
Assert.Equal(expected, actual);
}
public void Rgba64_FromScaledVector4(ushort r, ushort g, ushort b, ushort a)
{
// arrange
var source = new Rgba64(r, g, b, a);
// act
Vector4 scaled = source.ToScaledVector4();
Rgba64 actual = default;
actual.FromScaledVector4(scaled);
// assert
Assert.Equal(source, actual);
}
public static void ModifyPixel <TPixel>(ImageFrame <TPixel> img, int x, int y, byte perChannelChange)
where TPixel : unmanaged, IPixel <TPixel>
{
TPixel pixel = img[x, y];
Rgba64 rgbaPixel = default;
rgbaPixel.FromScaledVector4(pixel.ToScaledVector4());
ushort change = (ushort)Math.Round((perChannelChange / 255F) * 65535F);
if (rgbaPixel.R + perChannelChange <= 255)
{
rgbaPixel.R += change;
}
else
{
rgbaPixel.R -= change;
}
if (rgbaPixel.G + perChannelChange <= 255)
{
rgbaPixel.G += change;
}
else
{
rgbaPixel.G -= change;
}
if (rgbaPixel.B + perChannelChange <= 255)
{
rgbaPixel.B += perChannelChange;
}
else
{
rgbaPixel.B -= perChannelChange;
}
if (rgbaPixel.A + perChannelChange <= 255)
{
rgbaPixel.A += perChannelChange;
}
else
{
rgbaPixel.A -= perChannelChange;
}
pixel.FromRgba64(rgbaPixel);
img[x, y] = pixel;
}