public static FromUInt32 ( |
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/// <summary> /// Blends the colors based on the given weight values. /// </summary> /// <param name="c">The array of color values.</param> /// <param name="w">The array of weight values.</param> /// <returns> /// Each color will be blended in proportionally to its weight value respective to /// the total summation of the weight values. /// </returns> /// <remarks> /// "WAIP" stands for "weights, floating-point"</remarks> public static ColorBgra BlendColorsWFP(ColorBgra[] c, double[] w) { if (c.Length != w.Length) { throw new ArgumentException("c.Length != w.Length"); } if (c.Length == 0) { return(ColorBgra.FromUInt32(0)); } double wsum = 0; double asum = 0; for (int i = 0; i < w.Length; ++i) { wsum += w[i]; asum += (double)c[i].A * w[i]; } double a = asum / wsum; double aMultWsum = a * wsum; double b; double g; double r; if (asum == 0) { b = 0; g = 0; r = 0; } else { b = 0; g = 0; r = 0; for (int i = 0; i < c.Length; ++i) { b += (double)c[i].A * c[i].B * w[i]; g += (double)c[i].A * c[i].G * w[i]; r += (double)c[i].A * c[i].R * w[i]; } b /= aMultWsum; g /= aMultWsum; r /= aMultWsum; } return(ColorBgra.FromBgra((byte)b, (byte)g, (byte)r, (byte)a)); }
/// <summary> /// Blends the colors based on the given weight values. /// </summary> /// <param name="c">The array of color values.</param> /// <param name="w">The array of weight values.</param> /// <returns> /// The weights should be fixed point numbers. /// The total summation of the weight values will be treated as "1.0". /// Each color will be blended in proportionally to its weight value respective to /// the total summation of the weight values. /// </returns> /// <remarks> /// "WAIP" stands for "weights, arbitrary integer precision"</remarks> public static ColorBgra BlendColorsWAIP(ColorBgra[] c, uint[] w) { if (c.Length != w.Length) { throw new ArgumentException("c.Length != w.Length"); } if (c.Length == 0) { return(ColorBgra.FromUInt32(0)); } long wsum = 0; long asum = 0; for (int i = 0; i < w.Length; ++i) { wsum += w[i]; asum += c[i].A * w[i]; } uint a = (uint)((asum + (wsum >> 1)) / wsum); long b; long g; long r; if (a == 0) { b = 0; g = 0; r = 0; } else { b = 0; g = 0; r = 0; for (int i = 0; i < c.Length; ++i) { b += (long)c[i].A * c[i].B * w[i]; g += (long)c[i].A * c[i].G * w[i]; r += (long)c[i].A * c[i].R * w[i]; } b /= asum; g /= asum; r /= asum; } return(ColorBgra.FromUInt32((uint)b + ((uint)g << 8) + ((uint)r << 16) + ((uint)a << 24))); }
public static ColorBgra ParseHexString(string hexString) { uint value = Convert.ToUInt32(hexString, 16); return(ColorBgra.FromUInt32(value)); }