protected override byte QuantizePixel(Color2 pixel)
{
byte paletteIndex = (byte) colors;
if (pixel.ToBytes()[3] > Threshold){
paletteIndex = (byte) octree.GetPaletteIndex(pixel);
}
return paletteIndex;
}
public void Increment(Color2 pixel)
{
pixelCount++;
byte[] components = pixel.ToBytes();
red += components[0];
green += components[1];
blue += components[2];
}
protected override byte QuantizePixel(Color2 pixel)
{
byte paletteIndex = (byte)colors;
if (pixel.ToBytes()[3] > Threshold)
{
paletteIndex = (byte)octree.GetPaletteIndex(pixel);
}
return(paletteIndex);
}
protected override byte QuantizePixel(Color2 pixel)
{
byte colorIndex = 0;
string colorHash = pixel.ToString();
if (colorMap.ContainsKey(colorHash))
{
colorIndex = colorMap[colorHash];
}
else
{
byte[] bytes = pixel.ToBytes();
if (!(bytes[3] > Threshold))
{
for (int index = 0; index < colors.Length; index++)
{
if (colors[index].ToBytes()[3] == 0)
{
colorIndex = (byte)index;
TransparentIndex = colorIndex;
break;
}
}
}
else
{
int leastDistance = int.MaxValue;
int red = bytes[0];
int green = bytes[1];
int blue = bytes[2];
for (int index = 0; index < colors.Length; index++)
{
byte[] paletteColor = colors[index].ToBytes();
int redDistance = paletteColor[0] - red;
int greenDistance = paletteColor[1] - green;
int blueDistance = paletteColor[2] - blue;
int distance = (redDistance * redDistance) + (greenDistance * greenDistance) + (blueDistance * blueDistance);
if (distance < leastDistance)
{
colorIndex = (byte)index;
leastDistance = distance;
if (distance == 0)
{
break;
}
}
}
}
colorMap.TryAdd(colorHash, colorIndex);
}
return(colorIndex);
}
public int GetPaletteIndex(Color2 pixel, int level)
{
int index = paletteIndex;
if (!leaf)
{
int shift = 7 - level;
byte[] components = pixel.ToBytes();
int pixelIndex = ((components[2] & Mask[level]) >> (shift - 2)) | ((components[1] & Mask[level]) >> (shift - 1)) |
((components[0] & Mask[level]) >> shift);
if (children[pixelIndex] != null)
{
index = children[pixelIndex].GetPaletteIndex(pixel, level + 1);
}
else
{
throw new Exception($"Cannot retrive a pixel at the given index {pixelIndex}.");
}
}
return(index);
}
protected override byte QuantizePixel(Color2 pixel)
{
byte colorIndex = 0;
string colorHash = pixel.ToString();
if (colorMap.ContainsKey(colorHash)){
colorIndex = colorMap[colorHash];
} else{
byte[] bytes = pixel.ToBytes();
if (!(bytes[3] > Threshold)){
for (int index = 0; index < colors.Length; index++){
if (colors[index].ToBytes()[3] == 0){
colorIndex = (byte) index;
TransparentIndex = colorIndex;
break;
}
}
} else{
int leastDistance = int.MaxValue;
int red = bytes[0];
int green = bytes[1];
int blue = bytes[2];
for (int index = 0; index < colors.Length; index++){
byte[] paletteColor = colors[index].ToBytes();
int redDistance = paletteColor[0] - red;
int greenDistance = paletteColor[1] - green;
int blueDistance = paletteColor[2] - blue;
int distance = (redDistance*redDistance) + (greenDistance*greenDistance) + (blueDistance*blueDistance);
if (distance < leastDistance){
colorIndex = (byte) index;
leastDistance = distance;
if (distance == 0){
break;
}
}
}
}
colorMap.TryAdd(colorHash, colorIndex);
}
return colorIndex;
}
public void AddColor(Color2 pixel, int colorBits, int level, Octree octree)
{
if (leaf)
{
Increment(pixel);
octree.TrackPrevious(this);
}
else
{
int shift = 7 - level;
byte[] components = pixel.ToBytes();
int index = ((components[2] & Mask[level]) >> (shift - 2)) | ((components[1] & Mask[level]) >> (shift - 1)) |
((components[0] & Mask[level]) >> shift);
OctreeNode child = children[index];
if (child == null)
{
child = new OctreeNode(level + 1, colorBits, octree);
children[index] = child;
}
child.AddColor(pixel, colorBits, level + 1, octree);
}
}
public void Increment(Color2 pixel)
{
pixelCount++;
byte[] components = pixel.ToBytes();
red += components[0];
green += components[1];
blue += components[2];
}
public int GetPaletteIndex(Color2 pixel, int level)
{
int index = paletteIndex;
if (!leaf){
int shift = 7 - level;
byte[] components = pixel.ToBytes();
int pixelIndex = ((components[2] & Mask[level]) >> (shift - 2)) | ((components[1] & Mask[level]) >> (shift - 1)) |
((components[0] & Mask[level]) >> shift);
if (children[pixelIndex] != null){
index = children[pixelIndex].GetPaletteIndex(pixel, level + 1);
} else{
throw new Exception($"Cannot retrive a pixel at the given index {pixelIndex}.");
}
}
return index;
}
public void AddColor(Color2 pixel, int colorBits, int level, Octree octree)
{
if (leaf){
Increment(pixel);
octree.TrackPrevious(this);
} else{
int shift = 7 - level;
byte[] components = pixel.ToBytes();
int index = ((components[2] & Mask[level]) >> (shift - 2)) | ((components[1] & Mask[level]) >> (shift - 1)) |
((components[0] & Mask[level]) >> shift);
OctreeNode child = children[index];
if (child == null){
child = new OctreeNode(level + 1, colorBits, octree);
children[index] = child;
}
child.AddColor(pixel, colorBits, level + 1, octree);
}
}