public static TPixel GetReferenceBGRP32 <TPixel>(this Pixel.BGRP32 pixel)
where TPixel : unmanaged
{
if (typeof(TPixel) == typeof(Pixel.BGR24))
{
var pix = pixel.GetReferenceBGR24();
return(MEMUNSAFE.As <Pixel.BGR24, TPixel>(ref pix));
}
if (typeof(TPixel) == typeof(Pixel.RGB24))
{
var pix = pixel.GetReferenceRGB24();
return(MEMUNSAFE.As <Pixel.RGB24, TPixel>(ref pix));
}
if (typeof(TPixel) == typeof(Pixel.BGRA32))
{
var pix = pixel.GetReferenceBGRA32();
return(MEMUNSAFE.As <Pixel.BGRA32, TPixel>(ref pix));
}
if (typeof(TPixel) == typeof(Pixel.RGBA32))
{
var pix = pixel.GetReferenceRGBA32();
return(MEMUNSAFE.As <Pixel.RGBA32, TPixel>(ref pix));
}
if (typeof(TPixel) == typeof(Pixel.ARGB32))
{
var pix = pixel.GetReferenceARGB32();
return(MEMUNSAFE.As <Pixel.ARGB32, TPixel>(ref pix));
}
throw new NotImplementedException(typeof(TPixel).Name);
}
// 9.215 ns
public static Pixel.BGRA32 ToUnpremulReference(Pixel.BGRP32 src)
{
uint aa = src.A;
return(new Pixel.BGRA32
(
(Byte)((src.PreR * 255u) / aa),
(Byte)((src.PreG * 255u) / aa),
(Byte)((src.PreB * 255u) / aa),
src.A));
}
// 8.054 ns
public Pixel.BGRA32 ToUnpremulFast1(Pixel.BGRP32 src)
{
if (src.A == 0)
{
return(default);