/// <summary>
/// 色相の取得
/// </summary>
/// <param name="grp"></param>
/// <param name="pict"></param>
/// <param name="param"></param>
private void GetHue(GroupBox grp, PictureBox pict, ref Color.Param param)
{
int ix = Cursor.Position.X - (Location.X + grp.Location.X + pict.Location.X + 9);
int iy = Cursor.Position.Y - (Location.Y + grp.Location.Y + pict.Location.Y + 31);
double px = 2.0 * ix / pict.Width - 1.0;
double py = 1.0 - 2.0 * iy / pict.Height;
param.H = (int)(45 * Math.Atan2(py, px) / Math.Atan(1.0) + 0.5);
}
/// <summary>
/// HSL色空間の描画
/// </summary>
/// <param name="pictH"></param>
/// <param name="pictS"></param>
/// <param name="pictL"></param>
/// <param name="param"></param>
private void DrawHSL(PictureBox pictH, PictureBox pictS, PictureBox pictL, Color.Param param)
{
Pen penNorm = new Pen(System.Drawing.Color.Black, 1.0f);
Pen penBold = new Pen(System.Drawing.Color.Black, 4.0f);
Color.HSL hsl = new Color.HSL();
//*** 色相環の描画 ***//
Bitmap bmpHue = new Bitmap(BmpHue.Width, BmpHue.Height);
Graphics gHue = Graphics.FromImage(bmpHue);
RectangleF rectHue = new RectangleF(0.0f, 0.0f, bmpHue.Width, bmpHue.Height);
double th = -Math.Atan(1.0) * param.H / 45.0;
float ax = (float)(bmpHue.Width * Math.Cos(th) / 2.0);
float ay = (float)(bmpHue.Height * Math.Sin(th) / 2.0);
float bx = 0.75f * ax + bmpHue.Width / 2.0f;
float by = 0.75f * ay + bmpHue.Height / 2.0f;
ax += bmpHue.Width / 2.0f;
ay += bmpHue.Height / 2.0f;
gHue.DrawImage(BmpHue, 0, 0);
gHue.DrawArc(penBold, rectHue, -param.H, param.HWidth);
gHue.DrawArc(penBold, rectHue, -param.H - param.HWidth, param.HWidth);
gHue.DrawLine(penNorm, new PointF(ax, ay), new PointF(bx, by));
pictH.Image = bmpHue;
//*** 彩度と明度の描画 ***//
Bitmap bmpS = new Bitmap(pictS.Width, pictS.Height);
Bitmap bmpL = new Bitmap(pictL.Width, pictL.Height);
byte[] pixS = new byte[bmpS.Width * bmpS.Height * 4];
byte[] pixL = new byte[bmpL.Width * bmpL.Height * 4];
BitmapData bmpSData = bmpS.LockBits(
new Rectangle(0, 0, bmpS.Width, bmpS.Height)
, ImageLockMode.ReadOnly
, bmpS.PixelFormat
);
BitmapData bmpLData = bmpL.LockBits(
new Rectangle(0, 0, bmpL.Width, bmpL.Height)
, ImageLockMode.ReadOnly
, bmpL.PixelFormat
);
double k = 100.0 / bmpS.Width;
for (int px = 0, s = 0; px < bmpS.Width; ++px, s += 4)
{
hsl.H = param.H;
hsl.S = (int)(k * px);
hsl.L = 50;
hsl.A = 255;
Color.HSLtoRGB(ref hsl, ref pixS, ref s);
hsl.H = param.H;
hsl.S = param.SMax;
hsl.L = (int)(k * px);
hsl.A = 255;
Color.HSLtoRGB(ref hsl, ref pixL, ref s);
}
for (int py = 0, s = 0; py < bmpS.Height; ++py, s += bmpSData.Stride)
{
Array.Copy(pixS, 0, pixS, s, bmpSData.Stride);
Array.Copy(pixL, 0, pixL, s, bmpSData.Stride);
}
Marshal.Copy(pixS, 0, bmpSData.Scan0, pixS.Length);
Marshal.Copy(pixL, 0, bmpLData.Scan0, pixL.Length);
bmpS.UnlockBits(bmpSData);
bmpL.UnlockBits(bmpLData);
pictS.Image = bmpS;
pictL.Image = bmpL;
}
