unsafe public static void ConvertBgrToGreyUQ15(byte *ipstart, byte *opstart, int cb)
{
fixed(byte *gtstart = &LookupTables.SrgbGamma[0])
{
ushort *ip = (ushort *)ipstart, ipe = (ushort *)(ipstart + cb) - 3, op = (ushort *)opstart;
byte * gt = gtstart;
while (ip <= ipe)
{
uint y = Rec709.LumaFromBgr(ip[0], ip[1], ip[2]);
op[0] = gt[y];
ip += 3;
op++;
}
}
}
unsafe public static void ConvertBgrxToGreyUQ15(byte *ipstart, byte *opstart, int cb)
{
fixed(byte *gtstart = LookupTables.Gamma)
{
ushort *ip = (ushort *)ipstart + 4, ipe = (ushort *)(ipstart + cb), op = (ushort *)opstart + 1;
byte * gt = gtstart;
while (ip <= ipe)
{
uint y = Rec709.LumaFromBgr(ip[-4], ip[-3], ip[-2]);
op[-1] = gt[y];
ip += 4;
op++;
}
}
}
unsafe public static void ConvertBgrToGreyUQ15(byte *ipstart, byte *opstart, int cb)
{
fixed(byte *gtstart = LookupTables.Gamma)
{
ushort *ip = (ushort *)ipstart + 3, ipe = (ushort *)(ipstart + cb);
byte * op = opstart + 1, gt = gtstart;
while (ip <= ipe)
{
ushort y = Rec709.LumaFromBgr(ip[-3], ip[-2], ip[-1]);
op[-1] = gt[ClampToUQ15(y)];
ip += 3;
op++;
}
}
}