/// <summary>
/// Fills in the content of the control showing all values of Luminance (0 to 100%) for the given
/// Hue and Saturation.
/// </summary>
protected void Draw_Style_Luminance()
{
Graphics g = Graphics.FromImage(m_Output);
float3 HSL = this.HSL; // Use the H and S values of the current color (m_HSL)
for (int i = 0; i < this.Height - 8; i++) // i represents the current line of pixels we want to draw horizontally
{
HSL.z = 1.0f - (float)i / (Height - 8); // L (Luminance) is based on the current vertical position
Pen pen = new Pen(AdobeColors.HSL_to_RGB_LDR(HSL)); // Get the Color for this line
g.DrawLine(pen, 11, i + 4, this.Width - 11, i + 4); // Draw the line and loop back for next line
pen.Dispose();
}
g.Dispose();
}
// The following functions do the real work of the control, drawing the primary content (the area between the slider)
//
/// <summary>
/// Fills in the content of the control showing all values of Hue (from 0 to 360)
/// </summary>
protected void Draw_Style_Hue()
{
Graphics g = Graphics.FromImage(m_Output);
float3 HSL = new float3();
HSL.y = 1.0f; // S and L will both be at 100% for this DrawStyle
HSL.z = 1.0f;
for (int i = 0; i < this.Height - 8; i++) // i represents the current line of pixels we want to draw horizontally
{
HSL.x = 1.0f - (float)i / (Height - 8); // H (hue) is based on the current vertical position
Pen pen = new Pen(AdobeColors.HSL_to_RGB_LDR(HSL)); // Get the Color for this line
g.DrawLine(pen, 11, i + 4, this.Width - 11, i + 4); // Draw the line and loop back for next line
pen.Dispose();
}
g.Dispose();
}
/// <summary>
/// Draws the content of the control filling in all color values with the provided Luminance or Brightness value.
/// </summary>
protected void Draw_Style_Brightness()
{
Graphics g = Graphics.FromImage(m_Output);
float3 HSL = this.HSL;
float3 hsl_start = float3.Zero;
float3 hsl_end = float3.Zero;
hsl_start.z = HSL.z;
hsl_end.z = HSL.z;
hsl_start.y = 1.0f;
hsl_end.y = 0.0f;
for (int i = 0; i < Width - 4; i++) // For each vertical line in the control:
{
hsl_start.x = (float)i / (Width - 4); // Calculate Hue at this line (Saturation and Luminance are constant)
hsl_end.x = hsl_start.x;
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(2, 2, 1, this.Height - 4), AdobeColors.HSL_to_RGB_LDR(hsl_start), AdobeColors.HSL_to_RGB_LDR(hsl_end), 90, false);
g.FillRectangle(br, new System.Drawing.Rectangle(i + 2, 2, 1, this.Height - 4));
}
}
/// <summary>
/// Draws the content of the control filling in all color values with the provided Hue value.
/// </summary>
protected void Draw_Style_Hue()
{
Graphics g = Graphics.FromImage(m_Output);
float3 HSL = this.HSL;
float3 hsl_start = float3.Zero;
float3 hsl_end = float3.Zero;
hsl_start.x = HSL.x;
hsl_end.x = HSL.x;
hsl_start.y = 0.0f;
hsl_end.y = 1.0f;
for (int i = 0; i < this.Height - 4; i++) // For each horizontal line in the control:
{
hsl_start.z = 1.0f - (float)i / (Height - 4); // Calculate luminance at this line (Hue and Saturation are constant)
hsl_end.z = hsl_start.z;
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(2, 2, this.Width - 4, 1), AdobeColors.HSL_to_RGB_LDR(hsl_start), AdobeColors.HSL_to_RGB_LDR(hsl_end), 0, false);
g.FillRectangle(br, new System.Drawing.Rectangle(2, i + 2, this.Width - 4, 1));
}
}
/// <summary>
/// Redraws only the content over the marker
/// </summary>
protected void ClearMarker()
{
Graphics g = Graphics.FromImage(m_Output);
// Determine the area that needs to be redrawn
int start_x, start_y, end_x, end_y;
int red = 0; int green = 0; int blue = 0;
float3 hsl_start = float3.Zero;
float3 hsl_end = float3.Zero;
// Find the markers corners
start_x = m_iMarker_X - 5;
start_y = m_iMarker_Y - 5;
end_x = m_iMarker_X + 5;
end_y = m_iMarker_Y + 5;
// Adjust the area if part of it hangs outside the content area
if (start_x < 0)
{
start_x = 0;
}
if (start_y < 0)
{
start_y = 0;
}
if (end_x > this.Width - 4)
{
end_x = this.Width - 4;
}
if (end_y > this.Height - 4)
{
end_y = this.Height - 4;
}
float3 HSL = this.HSL;
// Redraw the content based on the current draw style:
// The code is getting a little messy from here
switch (m_DrawStyle)
{
// S=0,S=1,S=2,S=3.....S=100
// L=100
// L=99
// L=98 Drawstyle
// L=97 Hue
// ...
// L=0
case ColorPickerForm.DRAW_STYLE.Hue:
hsl_start.x = HSL.x; hsl_end.x = HSL.x; // Hue is constant
hsl_start.y = (float)start_x / (Width - 4); // Because we're drawing horizontal lines, s will not change
hsl_end.y = (float)end_x / (Width - 4); // from line to line
for (int i = start_y; i <= end_y; i++) // For each horizontal line:
{
hsl_start.z = 1.0f - (float)i / (Height - 4); // Brightness (L) WILL change for each horizontal
hsl_end.z = hsl_start.z; // line drawn
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(start_x + 1, i + 2, end_x - start_x + 1, 1), AdobeColors.HSL_to_RGB_LDR(hsl_start), AdobeColors.HSL_to_RGB_LDR(hsl_end), 0, false);
g.FillRectangle(br, new System.Drawing.Rectangle(start_x + 2, i + 2, end_x - start_x + 1, 1));
}
break;
// H=0,H=1,H=2,H=3.....H=360
// L=100
// L=99
// L=98 Drawstyle
// L=97 Saturation
// ...
// L=0
case ColorPickerForm.DRAW_STYLE.Saturation:
hsl_start.y = HSL.y; hsl_end.y = HSL.y; // Saturation is constant
hsl_start.z = 1.0f - (float)start_y / (Height - 4); // Because we're drawing vertical lines, L will
hsl_end.z = 1.0f - (float)end_y / (Height - 4); // not change from line to line
for (int i = start_x; i <= end_x; i++) // For each vertical line:
{
hsl_start.x = (float)i / (Width - 4); // Hue (H) WILL change for each vertical
hsl_end.x = hsl_start.x; // line drawn
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(i + 2, start_y + 1, 1, end_y - start_y + 2), AdobeColors.HSL_to_RGB_LDR(hsl_start), AdobeColors.HSL_to_RGB_LDR(hsl_end), 90, false);
g.FillRectangle(br, new System.Drawing.Rectangle(i + 2, start_y + 2, 1, end_y - start_y + 1));
}
break;
// H=0,H=1,H=2,H=3.....H=360
// S=100
// S=99
// S=98 Drawstyle
// S=97 Brightness
// ...
// S=0
case ColorPickerForm.DRAW_STYLE.Brightness:
hsl_start.z = HSL.z; hsl_end.z = HSL.z; // Luminance is constant
hsl_start.y = 1.0f - (float)start_y / (Height - 4); // Because we're drawing vertical lines, S will
hsl_end.y = 1.0f - (float)end_y / (Height - 4); // not change from line to line
for (int i = start_x; i <= end_x; i++) // For each vertical line:
{
hsl_start.x = (float)i / (Width - 4); // Hue (H) WILL change for each vertical
hsl_end.x = hsl_start.x; // line drawn
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(i + 2, start_y + 1, 1, end_y - start_y + 2), AdobeColors.HSL_to_RGB_LDR(hsl_start), AdobeColors.HSL_to_RGB_LDR(hsl_end), 90, false);
g.FillRectangle(br, new System.Drawing.Rectangle(i + 2, start_y + 2, 1, end_y - start_y + 1));
}
break;
// B=0,B=1,B=2,B=3.....B=100
// G=100
// G=99
// G=98 Drawstyle
// G=97 Red
// ...
// G=0
case ColorPickerForm.DRAW_STYLE.Red:
red = AdobeColors.ConvertHDR2LDR(m_RGB).R; // Red is constant
int start_b = Round(255 * (double)start_x / (this.Width - 4)); // Because we're drawing horizontal lines, B
int end_b = Round(255 * (double)end_x / (this.Width - 4)); // will not change from line to line
for (int i = start_y; i <= end_y; i++) // For each horizontal line:
{
green = Round(255 - (255 * (double)i / (this.Height - 4))); // green WILL change for each horizontal line drawn
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(start_x + 1, i + 2, end_x - start_x + 1, 1), Color.FromArgb(red, green, start_b), Color.FromArgb(red, green, end_b), 0, false);
g.FillRectangle(br, new System.Drawing.Rectangle(start_x + 2, i + 2, end_x - start_x + 1, 1));
}
break;
// B=0,B=1,B=2,B=3.....B=100
// R=100
// R=99
// R=98 Drawstyle
// R=97 Green
// ...
// R=0
case ColorPickerForm.DRAW_STYLE.Green:
green = AdobeColors.ConvertHDR2LDR(m_RGB).G; // Green is constant
int start_b2 = Round(255 * (double)start_x / (this.Width - 4)); // Because we're drawing horizontal lines, B
int end_b2 = Round(255 * (double)end_x / (this.Width - 4)); // will not change from line to line
for (int i = start_y; i <= end_y; i++) // For each horizontal line:
{
red = Round(255 - (255 * (double)i / (this.Height - 4))); // red WILL change for each horizontal line drawn
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(start_x + 1, i + 2, end_x - start_x + 1, 1), Color.FromArgb(red, green, start_b2), Color.FromArgb(red, green, end_b2), 0, false);
g.FillRectangle(br, new System.Drawing.Rectangle(start_x + 2, i + 2, end_x - start_x + 1, 1));
}
break;
// R=0,R=1,R=2,R=3.....R=100
// G=100
// G=99
// G=98 Drawstyle
// G=97 Blue
// ...
// G=0
case ColorPickerForm.DRAW_STYLE.Blue:
blue = AdobeColors.ConvertHDR2LDR(m_RGB).B; // Blue is constant
int start_r = Round(255 * (double)start_x / (this.Width - 4)); // Because we're drawing horizontal lines, R
int end_r = Round(255 * (double)end_x / (this.Width - 4)); // will not change from line to line
for (int i = start_y; i <= end_y; i++) // For each horizontal line:
{
green = Round(255 - (255 * (double)i / (this.Height - 4))); // green WILL change for each horizontal line drawn
LinearGradientBrush br = new LinearGradientBrush(new System.Drawing.Rectangle(start_x + 1, i + 2, end_x - start_x + 1, 1), Color.FromArgb(start_r, green, blue), Color.FromArgb(end_r, green, blue), 0, false);
g.FillRectangle(br, new System.Drawing.Rectangle(start_x + 2, i + 2, end_x - start_x + 1, 1));
}
break;
}
}