public void GenerateHSLRoundtripCharts()
{
var pixelFormat = PixelFormat.Format24bppRgb;
Directory.CreateDirectory("rgb_to_hsl");
for (var b = 0; b < 256; b++)
{
using (var bitmap = new Bitmap(256, 256, pixelFormat))
{
var bits = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, pixelFormat);
try
{
unsafe
{
void *pData = bits.Scan0.ToPointer();
byte *pRow = (byte *)pData;
for (var g = 0; g < 256; g++)
{
BitmapRGB *pCol = (BitmapRGB *)pRow;
for (var r = 0; r < 256; r++)
{
var rgb1 = new RGB((byte)r, (byte)g, (byte)b);
var hsl = rgb1.ToHSL();
var rgb2 = hsl.ToRGB();
var rgb = new RGB();
#if HIGHLIGHT_ROUNDTRIP_DIFFERENCES
rgb.R = (byte)(Abs(rgb1.R - rgb2.R));
rgb.G = (byte)(Abs(rgb1.G - rgb2.G));
rgb.B = (byte)(Abs(rgb1.B - rgb2.B));
#else
rgb.R = (byte)Math.Abs(rgb1.R - rgb2.R);
rgb.G = (byte)Math.Abs(rgb1.G - rgb2.G);
rgb.B = (byte)Math.Abs(rgb1.B - rgb2.B);
#endif
pCol->R = rgb.R;
pCol->G = rgb.G;
pCol->B = rgb.B;
pCol++;
}
pRow += bits.Stride;
}
}
}
finally
{
bitmap.UnlockBits(bits);
}
bitmap.Save($@"rgb_to_hsl\{b}.bmp", ImageFormat.Bmp);
}
}
}
public void GenerateHSLCharts()
{
var pixelFormat = PixelFormat.Format24bppRgb;
Directory.CreateDirectory("hsl");
for (var l = 0; l < 256; l++)
{
using (var bitmap = new Bitmap(360, 256, pixelFormat))
{
var bits = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, pixelFormat);
try
{
unsafe
{
void *pData = bits.Scan0.ToPointer();
byte *pRow = (byte *)pData;
for (var s = 0; s < 256; s++)
{
BitmapRGB *pCol = (BitmapRGB *)pRow;
for (var h = 0; h < 360; h++)
{
var hsl = new HSL((ushort)h, (byte)s, (byte)l);
var rgb = hsl.ToRGB();
pCol->R = rgb.R;
pCol->G = rgb.G;
pCol->B = rgb.B;
pCol++;
}
pRow += bits.Stride;
}
}
}
finally
{
bitmap.UnlockBits(bits);
}
bitmap.Save($@"hsl\{l}.bmp", ImageFormat.Bmp);
}
}
}
public void GenerateRGBReferenceCharts()
{
var pixelFormat = PixelFormat.Format24bppRgb;
Directory.CreateDirectory("rgb");
for (var b = 0; b < 256; b++)
{
using (var bitmap = new Bitmap(256, 256, pixelFormat))
{
var bits = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, pixelFormat);
try
{
unsafe
{
void *pData = bits.Scan0.ToPointer();
byte *pRow = (byte *)pData;
for (var g = 0; g < 256; g++)
{
BitmapRGB *pCol = (BitmapRGB *)pRow;
for (var r = 0; r < 256; r++)
{
pCol->R = (byte)r;
pCol->G = (byte)g;
pCol->B = (byte)b;
pCol++;
}
pRow += bits.Stride;
}
}
}
finally
{
bitmap.UnlockBits(bits);
}
bitmap.Save($@"rgb\{b}.bmp", ImageFormat.Bmp);
}
}
}
