public Color[] GetColors(ColoringMode coloringMode, MapColorPalette colorPalette, Color startColor, Color middleColor, Color endColor, int colorCount)
{
if (colorCount == 0)
{
return(null);
}
if (coloringMode == ColoringMode.DistinctColors)
{
ColorGenerator colorGenerator = new ColorGenerator();
return(colorGenerator.GenerateColors(colorPalette, colorCount));
}
switch (colorCount)
{
case 1:
return(new Color[1]
{
startColor
});
case 2:
return(new Color[2]
{
startColor,
endColor
});
default:
{
bool flag = middleColor.A == 0;
byte a = startColor.A;
byte a3 = middleColor.A;
byte a2 = endColor.A;
startColor = Color.FromArgb(255, startColor);
middleColor = Color.FromArgb(255, middleColor);
endColor = Color.FromArgb(255, endColor);
Color[] array = new Color[colorCount];
array[0] = startColor;
array[colorCount - 1] = endColor;
Rectangle rect = new Rectangle(0, 0, colorCount, 1);
if (colorCount % 2 == 1)
{
rect.Width--;
}
Bitmap bitmap = new Bitmap(colorCount, 1);
using (LinearGradientBrush linearGradientBrush = new LinearGradientBrush(rect, startColor, endColor, 0f, false))
{
ColorBlend colorBlend = new ColorBlend();
if (flag)
{
colorBlend.Positions = new float[2]
{
0f,
1f
};
colorBlend.Colors = new Color[2]
{
startColor,
endColor
};
}
else
{
colorBlend.Positions = new float[3]
{
0f,
0.5f,
1f
};
colorBlend.Colors = new Color[3]
{
startColor,
middleColor,
endColor
};
}
linearGradientBrush.InterpolationColors = colorBlend;
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.FillRectangle(linearGradientBrush, rect);
}
}
float num = (float)((a2 - a) / (colorCount - 1));
float num2 = (float)(int)a;
for (int i = 1; i < colorCount - 1; i++)
{
num2 += num;
Color pixel = bitmap.GetPixel(i, 0);
array[i] = Color.FromArgb((int)num2, pixel);
}
return(array);
}
}
}
