public void ConversionTest()
{
Color32 c = Color32.FromArgb(0x11223344);
Color64 c64 = new Color64(c);
Assert.AreEqual(c, c64.ToColor32());
}
public void ConversionTest()
{
Color32 c = Color32.FromArgb(0x11223344);
Color48 c48 = new Color48(c);
Assert.AreEqual(c.ToOpaque(), c48.ToColor32());
}
public void ConversionTest()
{
Color32 c = Color32.FromArgb(0x11223344);
Color16Gray c16 = new Color16Gray(c);
Assert.AreEqual((ushort)(0x2222 * ColorExtensions.RLum + 0x3333 * ColorExtensions.GLum + 0x4444 * ColorExtensions.BLum), c16.Value);
}
protected static void GenerateAlphaGradient(IReadWriteBitmapData bitmapData)
{
var firstRow = bitmapData.FirstRow;
float ratio = 255f / (bitmapData.Width / 6f);
float limit = bitmapData.Width / 6f;
for (int x = 0; x < bitmapData.Width; x++)
{
// red -> yellow
if (x < limit)
{
firstRow[x] = new Color32(255, (x * ratio).ClipToByte(), 0);
}
// yellow -> green
else if (x < limit * 2)
{
firstRow[x] = new Color32((255 - (x - limit) * ratio).ClipToByte(), 255, 0);
}
// green -> cyan
else if (x < limit * 3)
{
firstRow[x] = new Color32(0, 255, ((x - limit * 2) * ratio).ClipToByte());
}
// cyan -> blue
else if (x < limit * 4)
{
firstRow[x] = new Color32(0, (255 - (x - limit * 3) * ratio).ClipToByte(), 255);
}
// blue -> magenta
else if (x < limit * 5)
{
firstRow[x] = new Color32(((x - limit * 4) * ratio).ClipToByte(), 0, 255);
}
// magenta -> red
else
{
firstRow[x] = new Color32(255, 0, (255 - (x - limit * 5) * ratio).ClipToByte());
}
}
if (bitmapData.Height < 2)
{
return;
}
var row = bitmapData[1];
ratio = 255f / bitmapData.Height;
do
{
byte a = (255 - row.Index * ratio).ClipToByte();
for (int x = 0; x < bitmapData.Width; x++)
{
row[x] = Color32.FromArgb(a, firstRow[x]);
}
} while (row.MoveNextRow());
}
