/// <summary>
/// See <see cref="BaseColorCache.OnGetColorPaletteIndex"/> for more details.
/// </summary>
protected override void OnGetColorPaletteIndex(Color color, out Int32 paletteIndex)
{
BucketInfo bucket = GetBucket(color);
Int32 colorCount = bucket.Colors.Count();
paletteIndex = 0;
if (colorCount == 1)
{
paletteIndex = bucket.Colors.First().Key;
}
else
{
Int32 index = 0;
Int32 colorIndex = ColorModelHelper.GetEuclideanDistance(color, ColorModel, bucket.Colors.Values.ToList());
foreach (Int32 colorPaletteIndex in bucket.Colors.Keys)
{
if (index == colorIndex)
{
paletteIndex = colorPaletteIndex;
break;
}
index++;
}
}
}
/// <summary>
/// Splits this cube's color list at median index, and returns two newly created cubes.
/// </summary>
/// <param name="componentIndex">Index of the component (red = 0, green = 1, blue = 2).</param>
/// <param name="firstMedianCutCube">The first created cube.</param>
/// <param name="secondMedianCutCube">The second created cube.</param>
public void SplitAtMedian(Byte componentIndex, out MedianCutCube firstMedianCutCube, out MedianCutCube secondMedianCutCube)
{
List <Int32> colors;
switch (componentIndex)
{
// red colors
case 0:
colors = colorList.OrderBy(argb => ColorModelHelper.GetComponentA(ColorModel, TextureBitmap.Color.FromARGB(argb))).ToList();
break;
// green colors
case 1:
colors = colorList.OrderBy(argb => ColorModelHelper.GetComponentB(ColorModel, TextureBitmap.Color.FromARGB(argb))).ToList();
break;
// blue colors
case 2:
colors = colorList.OrderBy(argb => ColorModelHelper.GetComponentC(ColorModel, TextureBitmap.Color.FromARGB(argb))).ToList();
break;
default:
throw new NotSupportedException("Only three color components are supported (R, G and B).");
}
// retrieves the median index (a half point)
Int32 medianIndex = colorList.Count >> 1;
// creates the two half-cubes
firstMedianCutCube = new MedianCutCube(colors.GetRange(0, medianIndex));
secondMedianCutCube = new MedianCutCube(colors.GetRange(medianIndex, colors.Count - medianIndex));
}
/// <summary>
/// Determines whether the color is in the space of this cube.
/// </summary>
/// <param name="color">The color to be checked, if it's contained in this cube.</param>
/// <returns>if true a color is in the space of this cube, otherwise returns false.</returns>
public Boolean IsColorIn(TextureBitmap.Color color)
{
Int32 red = ColorModelHelper.GetComponentA(ColorModel, color);
Int32 green = ColorModelHelper.GetComponentB(ColorModel, color);
Int32 blue = ColorModelHelper.GetComponentC(ColorModel, color);
return((red >= redLowBound && red <= redHighBound) &&
(green >= greenLowBound && green <= greenHighBound) &&
(blue >= blueLowBound && blue <= blueHighBound));
}
/// <summary>
/// See <see cref="BaseColorCache.OnGetColorPaletteIndex"/> for more details.
/// </summary>
protected override void OnGetColorPaletteIndex(TextureBitmap.Color color, out Int32 paletteIndex)
{
Dictionary <Int32, TextureBitmap.Color> candidates = root.GetPaletteIndex(color, 0);
paletteIndex = 0;
Int32 index = 0;
Int32 colorIndex = ColorModelHelper.GetEuclideanDistance(color, ColorModel, candidates.Values.ToList());
foreach (Int32 colorPaletteIndex in candidates.Keys)
{
if (index == colorIndex)
{
paletteIndex = colorPaletteIndex;
break;
}
index++;
}
}
private Int64 GetColorBucketIndex(Color color)
{
Single normalizedDistance = 0.0f;
Single componentA, componentB, componentC;
switch (ColorModel)
{
case ColorModel.RedGreenBlue: normalizedDistance = NormalizedDistanceRGB; break;
case ColorModel.HueSaturationLuminance: normalizedDistance = NormalizedDistanceHSL; break;
case ColorModel.LabColorSpace: normalizedDistance = NormalizedDistanceLab; break;
}
ColorModelHelper.GetColorComponents(ColorModel, color, out componentA, out componentB, out componentC);
Single distance = componentA * componentA + componentB * componentB + componentC * componentC;
Single normalized = distance * normalizedDistance * MaximalDistance;
Int64 resultHash = (Int64)normalized / bucketSize;
return(resultHash);
}
protected override int CalculatePaletteIndex(Color color)
{
var candidates = _root.GetPaletteIndex(color, 0);
var result = 0;
int index = 0;
int colorIndex =
ColorModelHelper.GetSmallestEuclideanDistanceIndex(_colorModel, color, candidates.Values.ToList());
foreach (var colorPaletteIndex in candidates.Keys)
{
if (index == colorIndex)
{
result = colorPaletteIndex;
break;
}
index++;
}
return(result);
}
/// <summary>
/// Shrinks this cube to the least dimensions that covers all the colors in the RGB space.
/// </summary>
private void Shrink()
{
redLowBound = greenLowBound = blueLowBound = 255;
redHighBound = greenHighBound = blueHighBound = 0;
foreach (Int32 argb in colorList)
{
TextureBitmap.Color color = TextureBitmap.Color.FromARGB(argb);
Int32 red = ColorModelHelper.GetComponentA(ColorModel, color);
Int32 green = ColorModelHelper.GetComponentB(ColorModel, color);
Int32 blue = ColorModelHelper.GetComponentC(ColorModel, color);
if (red < redLowBound)
{
redLowBound = red;
}
if (red > redHighBound)
{
redHighBound = red;
}
if (green < greenLowBound)
{
greenLowBound = green;
}
if (green > greenHighBound)
{
greenHighBound = green;
}
if (blue < blueLowBound)
{
blueLowBound = blue;
}
if (blue > blueHighBound)
{
blueHighBound = blue;
}
}
}
private int CalculatePaletteIndexInternal(Color color)
{
return(ColorModelHelper.GetSmallestEuclideanDistanceIndex(ColorModel, color, Palette, AlphaThreshold));
}
/// <summary>
/// See <see cref="BaseColorCache.OnGetColorPaletteIndex"/> for more details.
/// </summary>
protected override void OnGetColorPaletteIndex(Color color, out Int32 paletteIndex)
{
paletteIndex = ColorModelHelper.GetEuclideanDistance(color, ColorModel, palette);
}
