public BGR24 AlphaBlendWith(BGRA32 src, int opacity)
{
opacity = opacity * src.A / 255;
var x = 16384 - opacity;
var r = (this.R * x + src.R * opacity) / 16384;
var g = (this.G * x + src.G * opacity) / 16384;
var b = (this.B * x + src.B * opacity) / 16384;
return(new BGR24(r, g, b));
}
public Luminance8(BGRA32 color)
{
uint accum = 0;
accum += RLuminanceWeight16 * (uint)color.R;
accum += GLuminanceWeight16 * (uint)color.G;
accum += BLuminanceWeight16 * (uint)color.B;
accum >>= 16;
L = (Byte)accum;
}
public Luminance16(BGRA32 color)
{
uint accum = 0;
accum += RLuminanceWeight16 * (uint)color.R;
accum += GLuminanceWeight16 * (uint)color.G;
accum += BLuminanceWeight16 * (uint)color.B;
accum >>= 8;
L = (UInt16)accum;
}
public readonly void CopyTo(ref BGRA32 pixel, int y)
{
#if NETSTANDARD2_0
pixel.R = GetRed(y);
pixel.G = GetGreen(y);
pixel.B = GetBlue(y);
#else
pixel.R = (Byte)Math.Clamp(y + _V, 0, 255);
pixel.G = (Byte)Math.Clamp(y + _UV, 0, 255);
pixel.B = (Byte)Math.Clamp(y + _U, 0, 255);
#endif
pixel.A = 255;
}
public static RGBP128F LerpToRGBP128F(BGRA32 tl, BGRA32 tr, BGRA32 bl, BGRA32 br, float rx, float by)
{
// calculate quantized weights
var lx = 1f - rx;
var ty = 1f - by;
var wwww = new System.Numerics.Vector4(lx * ty, rx * ty, lx * by, rx * by) / 255f;
// calculate final alpha
var aaaa = new System.Numerics.Vector4(tl.A, tr.A, bl.A, br.A);
var a = System.Numerics.Vector4.Dot(aaaa, wwww);
if (a == 0)
{
return(default);
public BGRA5551(BGRA32 color) : this(_PackRGBA(color.R, color.G, color.B, color.A >= _ALPHA_THRESHOLD))
{
}
public BGR565(BGRA32 color) : this(_PackRGB(color.R, color.G, color.B))
{
}
public Alpha8(BGRA32 color)
{
A = color.A;
}
public Luminance32F(BGRA32 color)
{
L = _FromRGBA(color.R, color.G, color.B, color.A) * Reciprocal65025;
}
