public Image MinC(Image dst, uint color)
{
color &= this.MaxColor;
if (color == this.MaxColor)
{
// nothing to set - simple copy
return(this.Copy(dst, true));
}
// create a copy of this image
dst = this.Copy(dst, false);
if (color == 0)
{
dst.SetToZero();
}
else
{
unsafe
{
fixed(ulong *bitssrc = this.Bits, bitsdst = dst.Bits)
{
switch (this.BitsPerPixel)
{
case 8:
Vectors.MinC(this.Height * this.Stride8, (byte *)bitssrc, (byte)color, (byte *)bitsdst);
break;
case 16:
Vectors.MinC(this.Height * this.Stride8 / sizeof(ushort), (ushort *)bitssrc, (ushort)color, (ushort *)bitsdst);
break;
case 24:
case 32:
{
byte *ptrsrc = (byte *)bitssrc;
byte *ptrdst = (byte *)bitsdst;
int stride8 = this.Stride8;
fixed(ulong *mask = this.ColorScanline(this.Stride, color))
{
for (int i = 0, ii = this.Height; i < ii; i++, ptrsrc += stride8, ptrdst += stride8)
{
Vectors.Min(stride8, ptrsrc, (byte *)mask, ptrdst);
}
}
}
break;
default:
throw new NotSupportedException(string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.E_UnsupportedDepth,
this.BitsPerPixel));
}
}
}
}
return(dst);
}
