// Y = Brightness 100 -> 0
protected override void DrawBrightness()
{
using (var graphics = Graphics.FromImage(bmp))
{
var start = new Hsb(SelectedColor.Hsb.Hue, SelectedColor.Hsb.Saturation, 1.0, SelectedColor.Rgba.Alpha);
var end = new Hsb(SelectedColor.Hsb.Hue, SelectedColor.Hsb.Saturation, 0.0, SelectedColor.Rgba.Alpha);
using (var brush = new LinearGradientBrush(new Rectangle(0, 0, clientWidth, clientHeight), start, end, LinearGradientMode.Vertical))
{
graphics.FillRectangle(brush, new Rectangle(0, 0, clientWidth, clientHeight));
}
}
}
protected override void DrawHue()
{
using (var graphics = Graphics.FromImage(bmp))
{
var color = new Hsb(0.0, 1.0, 1.0, SelectedColor.Rgba.Alpha);
for (var y = 0; y < clientHeight; y++)
{
color.Hue = 1.0 - ((double)y / (clientHeight - 1));
using (var pen = new Pen(color))
{
graphics.DrawLine(pen, 0, y, clientWidth, y);
}
}
}
}
public static Color HsbToColor(Hsb hsb)
{
int mid;
var max = (int)Math.Round(hsb.Brightness * 255);
var min = (int)Math.Round((1.0 - hsb.Saturation) * (hsb.Brightness / 1.0) * 255);
var q = (double)(max - min) / 255;
if (hsb.Hue >= 0 && hsb.Hue <= (double)1 / 6)
{
mid = (int)Math.Round((hsb.Hue - 0) * q * 1530 + min);
return(Color.FromArgb(hsb.Alpha, max, mid, min));
}
if (hsb.Hue <= (double)1 / 3)
{
return(Color.FromArgb(hsb.Alpha, (int)Math.Round(-((hsb.Hue - (double)1 / 6) * q) * 1530 + max), max,
min));
}
if (hsb.Hue <= 0.5)
{
mid = (int)Math.Round((hsb.Hue - (double)1 / 3) * q * 1530 + min);
return(Color.FromArgb(hsb.Alpha, min, max, mid));
}
if (hsb.Hue <= (double)2 / 3)
{
mid = (int)Math.Round(-((hsb.Hue - 0.5) * q) * 1530 + max);
return(Color.FromArgb(hsb.Alpha, min, mid, max));
}
if (hsb.Hue <= (double)5 / 6)
{
mid = (int)Math.Round((hsb.Hue - (double)2 / 3) * q * 1530 + min);
return(Color.FromArgb(hsb.Alpha, mid, min, max));
}
if (hsb.Hue <= 1.0)
{
mid = (int)Math.Round(-((hsb.Hue - (double)5 / 6) * q) * 1530 + max);
return(Color.FromArgb(hsb.Alpha, max, min, mid));
}
return(Color.FromArgb(hsb.Alpha, 0, 0, 0));
}
/// <summary>
/// </summary>
protected override void DrawBrightness()
{
using (var g = Graphics.FromImage(bmp))
{
var start = new Hsb(0.0, 1.0, SelectedColor.Hsb.Brightness, SelectedColor.Rgba.Alpha);
var end = new Hsb(0.0, 0.0, SelectedColor.Hsb.Brightness, SelectedColor.Rgba.Alpha);
for (var x = 0; x < clientWidth; x++)
{
start.Hue = end.Hue = (double)x / (clientHeight - 1);
using (var brush = new LinearGradientBrush(new Rectangle(0, 0, 1, clientHeight), start, end, LinearGradientMode.Vertical))
{
g.FillRectangle(brush, new Rectangle(x, 0, 1, clientHeight));
}
}
}
}
/// <summary>
/// </summary>
protected override void DrawHue()
{
using (var graphics = Graphics.FromImage(bmp))
{
var start = new Hsb(SelectedColor.Hsb.Hue, 0.0, 0.0, SelectedColor.Rgba.Alpha);
var end = new Hsb(SelectedColor.Hsb.Hue, 1.0, 0.0, SelectedColor.Rgba.Alpha);
for (var y = 0; y < clientHeight; y++)
{
start.Brightness = end.Brightness = 1.0 - (double)y / (clientHeight - 1);
using (var brush = new LinearGradientBrush(new Rectangle(0, 0, clientWidth, 1), start, end, LinearGradientMode.Horizontal))
{
graphics.FillRectangle(brush, new Rectangle(0, y, clientWidth, 1));
}
}
}
}
/// <summary>
/// </summary>
public void RgbaUpdate()
{
Hsb = Rgba;
Cmyk = Rgba;
}
/// <summary>
/// </summary>
/// <param name="color"></param>
public MyColor(Color color)
{
Rgba = color;
Hsb = color;
Cmyk = color;
}
/// <summary>
/// </summary>
public void CmykUpdate()
{
Rgba = Cmyk;
Hsb = Cmyk;
}
public bool Equals(Hsb other)
{
return(_hue.Equals(other._hue) && _saturation.Equals(other._saturation) && _brightness.Equals(other._brightness) && _alpha == other._alpha);
}
public static Hsb ColorToHsb(Color color)
{
var hsb = new Hsb();
int max, min;
if (color.R > color.G)
{
max = color.R;
min = color.G;
}
else
{
max = color.G;
min = color.R;
}
if (color.B > max)
{
max = color.B;
}
else if (color.B < min)
{
min = color.B;
}
var diff = max - min;
hsb.Brightness = (double)max / 255;
if (max == 0)
{
hsb.Saturation = 0;
}
else
{
hsb.Saturation = (double)diff / max;
}
double q;
if (diff == 0)
{
q = 0;
}
else
{
q = (double)60 / diff;
}
if (max == color.R)
{
if (color.G < color.B)
{
hsb.Hue = (360 + q * (color.G - color.B)) / 360;
}
else
{
hsb.Hue = q * (color.G - color.B) / 360;
}
}
else if (max == color.G)
{
hsb.Hue = (120 + q * (color.B - color.R)) / 360;
}
else if (max == color.B)
{
hsb.Hue = (240 + q * (color.R - color.G)) / 360;
}
else
{
hsb.Hue = 0.0;
}
hsb.Alpha = color.A;
return(hsb);
}
