private static System.Func <float, float, float> CreateBlendFunction(GradationMaterial.Blend blend)
{
switch (blend)
{
case GradationMaterial.Blend.Multiply:
default:
return((x, y) => x * y);
case GradationMaterial.Blend.Override:
return((x, y) => y);
case GradationMaterial.Blend.Ignore:
return((x, y) => x);
case GradationMaterial.Blend.Add:
return((x, y) => x + y);
case GradationMaterial.Blend.Subtract:
return((x, y) => x - y);
case GradationMaterial.Blend.Screen:
return((x, y) => 1.0f - (1.0f - x) * (1.0f - y));
case GradationMaterial.Blend.HardLight:
return((x, y) => ((y < 0.5f)? (x * y): (1.0f - (1.0f - x) * (1.0f - y))));
case GradationMaterial.Blend.HardLightFast:
return((x, y) => ((y < 0.5f)? (x * y): (x + y)));
case GradationMaterial.Blend.Darken:
return((x, y) => Mathf.Min(x, y));
case GradationMaterial.Blend.Lighten:
return((x, y) => Mathf.Max(x, y));
}
}
private static System.Func <int, int, int> CreateBlendFunction(GradationMaterial.Blend blend)
{
switch (blend)
{
case GradationMaterial.Blend.Multiply:
default:
return((x, y) => x * y / 0xFF);
case GradationMaterial.Blend.Override:
return((x, y) => y);
case GradationMaterial.Blend.Ignore:
return((x, y) => x);
case GradationMaterial.Blend.Add:
return((x, y) => Mathf.Min(x + y, 0xFF));
case GradationMaterial.Blend.Subtract:
return((x, y) => Mathf.Max(0, x - y));
case GradationMaterial.Blend.Screen:
return((x, y) => 0xFF - ((0xFF - x) * (0xFF - y) / 0xFF));
case GradationMaterial.Blend.HardLight:
return((x, y) => (y < 0x80)? (x * y / 0xFF): (0xFF - ((0xFF - x) * (0xFF - y) / 0xFF)));
case GradationMaterial.Blend.HardLightFast:
return((x, y) => (y < 0x80)? (x * y / 0xFF): Mathf.Min(x + y, 0xFF));
case GradationMaterial.Blend.Darken:
return((x, y) => Mathf.Min(x, y));
case GradationMaterial.Blend.Lighten:
return((x, y) => Mathf.Max(x, y));
}
}
