/// <summary>
/// Returns the nearest color in the palette
/// </summary>
public Color GetNearestColor(Color[] palette, Color color, ColorMatchMode colorMatchMode, float threshold, ColorEntry[] colorOperations, bool enableColorAdjustments, ColorAdjustments colorAdjustments)
{
if (colorOperations != null && colorOperations.Length > 0)
{
HSLColor hsl = ColorConversion.GetHSLFromRGB(color.r, color.g, color.b);
for (int k = 0; k < colorOperations.Length; k++)
{
switch (colorMatchMode)
{
case ColorMatchMode.RGB: {
float dr = colorOperations[k].color.r < color.r ? color.r - colorOperations[k].color.r : colorOperations[k].color.r - color.r;
float dg = colorOperations[k].color.g < color.g ? color.g - colorOperations[k].color.g : colorOperations[k].color.g - color.g;
float db = colorOperations[k].color.b < color.b ? color.b - colorOperations[k].color.b : colorOperations[k].color.b - color.b;
if (dr <= threshold && dg <= threshold && db <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
case ColorMatchMode.Red: {
float dr = colorOperations[k].color.r < color.r ? color.r - colorOperations[k].color.r : colorOperations[k].color.r - color.r;
if (dr <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
case ColorMatchMode.Green: {
float dg = colorOperations[k].color.g < color.g ? color.g - colorOperations[k].color.g : colorOperations[k].color.g - color.g;
if (dg <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
case ColorMatchMode.Blue: {
float db = colorOperations[k].color.b < color.b ? color.b - colorOperations[k].color.b : colorOperations[k].color.b - color.b;
if (db <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
case ColorMatchMode.HSL: {
HSLColor hslOp = ColorConversion.GetHSLFromRGB(colorOperations[k].color.r, colorOperations[k].color.g, colorOperations[k].color.b);
float dh = hslOp.h < hsl.h ? hsl.h - hslOp.h : hslOp.h - hsl.h;
float ds = hslOp.s < hsl.s ? hsl.s - hslOp.s : hslOp.s - hsl.s;
float dl = hslOp.l < hsl.l ? hsl.l - hslOp.l : hslOp.l - hsl.l;
if (dh <= threshold && ds <= threshold && dl <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
case ColorMatchMode.Hue: {
float hue = ColorConversion.GetHue(colorOperations[k].color.r, colorOperations[k].color.g, colorOperations[k].color.b);
float dh = hue < hsl.h ? hsl.h - hue : hue - hsl.h;
if (dh <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
case ColorMatchMode.Saturation: {
float sat = ColorConversion.GetSaturation(colorOperations[k].color.r, colorOperations[k].color.g, colorOperations[k].color.b);
float ds = sat < hsl.s ? hsl.s - sat : sat - hsl.s;
if (ds <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
case ColorMatchMode.Lightness: {
float l = ColorConversion.GetLightness(colorOperations[k].color.r, colorOperations[k].color.g, colorOperations[k].color.b);
float dl = l < hsl.l ? hsl.l - l : l - hsl.l;
if (dl <= threshold)
{
if (colorOperations[k].operation == ColorOperation.Preserve)
{
return(color);
}
else if (colorOperations[k].operation == ColorOperation.Replace)
{
return(colorOperations[k].replaceColor);
}
}
}
break;
}
}
}
float md = float.MaxValue;
Color nearest = color;
switch (colorMatchMode)
{
case ColorMatchMode.RGB: {
for (int c = 0; c < palette.Length; c++)
{
float dr = (palette[c].r - color.r) * 0.299f;
float dg = (palette[c].g - color.g) * 0.587f;
float db = (palette[c].b - color.b) * 0.114f;
float d = dr * dr + dg * dg + db * db;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
case ColorMatchMode.Red: {
for (int c = 0; c < palette.Length; c++)
{
float dr = palette[c].r - color.r;
float d = dr * dr;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
case ColorMatchMode.Green: {
for (int c = 0; c < palette.Length; c++)
{
float dg = palette[c].g - color.g;
float d = dg * dg;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
case ColorMatchMode.Blue: {
for (int c = 0; c < palette.Length; c++)
{
float db = palette[c].b - color.b;
float d = db * db;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
case ColorMatchMode.HSL: {
HSLColor hsl = ColorConversion.GetHSLFromRGB(color.r, color.g, color.b);
for (int c = 0; c < palette.Length; c++)
{
HSLColor paletteHSL = ColorConversion.GetHSLFromRGB(palette[c].r, palette[c].g, palette[c].b);
float dh = (paletteHSL.h - hsl.h);
float ds = (paletteHSL.s - hsl.s);
float dl = (paletteHSL.l - hsl.l);
float d = dh * dh + ds * ds + dl * dl;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
case ColorMatchMode.Hue: {
float h = ColorConversion.GetHue(color.r, color.g, color.b);
for (int c = 0; c < palette.Length; c++)
{
float paletteH = ColorConversion.GetHue(palette[c].r, palette[c].g, palette[c].b);
float dh = (paletteH - h);
float d = dh * dh;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
case ColorMatchMode.Saturation: {
float s = ColorConversion.GetSaturation(color.r, color.g, color.b);
for (int c = 0; c < palette.Length; c++)
{
float paletteS = ColorConversion.GetSaturation(palette[c].r, palette[c].g, palette[c].b);
float dh = (paletteS - s);
float d = dh * dh;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
case ColorMatchMode.Lightness: {
float l = ColorConversion.GetLightness(color.r, color.g, color.b);
for (int c = 0; c < palette.Length; c++)
{
float paletteL = ColorConversion.GetLightness(palette[c].r, palette[c].g, palette[c].b);
float dh = (paletteL - l);
float d = dh * dh;
if (d < md)
{
md = d;
nearest = palette[c];
}
}
}
break;
}
nearest.a = color.a;
color = nearest;
if (enableColorAdjustments)
{
if (colorAdjustments.applyLUT && colorAdjustments.LUT != null)
{
color = ApplyLUT(color, colorAdjustments.LUT);
}
// vibrance
float vibrance = colorAdjustments.vibrance;
if (vibrance > 0)
{
float maxComponent = color.r > color.g ? color.r : color.g;
maxComponent = color.b > maxComponent ? color.b : maxComponent;
float minComponent = color.r < color.g ? color.r : color.g;
minComponent = color.b < minComponent ? color.b : minComponent;
float sat = maxComponent - minComponent;
if (sat < 0)
{
sat = 0;
}
else if (sat > 1f)
{
sat = 1f;
}
float luma = color.GetLuma();
color.r *= 1f + vibrance * (1f - sat) * (color.r - luma);
color.g *= 1f + vibrance * (1f - sat) * (color.g - luma);
color.b *= 1f + vibrance * (1f - sat) * (color.b - luma);
}
// tinting
float tintAmount = colorAdjustments.tintAmount;
if (tintAmount > 0)
{
Color tintedColor = new Color(color.r * colorAdjustments.tintColor.r, color.g * colorAdjustments.tintColor.g, color.b * colorAdjustments.tintColor.b);
color = Color.Lerp(color, tintedColor, tintAmount);
}
// contrast
float contrast = colorAdjustments.contrast + 1f;
if (contrast != 1f)
{
color.r = (color.r - 0.5f) * contrast + 0.5f;
color.g = (color.g - 0.5f) * contrast + 0.5f;
color.b = (color.b - 0.5f) * contrast + 0.5f;
}
// brightness
float brightness = colorAdjustments.brightness + 1f;
if (brightness != 1f)
{
color.r *= brightness;
color.g *= brightness;
color.b *= brightness;
}
}
return(color);
}
Color GetTransformedColor(Color originalColor)
{
switch (currentBrush)
{
case Brush.Darken: {
if (originalColor.a == 0)
{
return(originalColor);
}
HSLColor hsl = ColorConversion.GetHSLFromRGB(originalColor.r, originalColor.g, originalColor.b);
hsl.l -= 0.05f;
if (hsl.l < 0.01f)
{
hsl.l = 0.01f;
}
return(ColorConversion.GetColorFromHSL(hsl.h, hsl.s, hsl.l));
}
case Brush.Lighten: {
if (originalColor.a == 0)
{
return(originalColor);
}
HSLColor hsl = ColorConversion.GetHSLFromRGB(originalColor.r, originalColor.g, originalColor.b);
hsl.l += 0.05f;
if (hsl.l > 0.99f)
{
hsl.l = 0.99f;
}
return(ColorConversion.GetColorFromHSL(hsl.h, hsl.s, hsl.l));
}
case Brush.Dry: {
if (originalColor.a == 0)
{
return(originalColor);
}
HSLColor hsl = ColorConversion.GetHSLFromRGB(originalColor.r, originalColor.g, originalColor.b);
hsl.s -= 0.05f;
if (hsl.s < 0.01f)
{
hsl.s = 0.01f;
}
return(ColorConversion.GetColorFromHSL(hsl.h, hsl.s, hsl.l));
}
case Brush.Vivid: {
if (originalColor.a == 0)
{
return(originalColor);
}
HSLColor hsl = ColorConversion.GetHSLFromRGB(originalColor.r, originalColor.g, originalColor.b);
hsl.s += 0.05f;
if (hsl.s > 0.99f)
{
hsl.s = 0.99f;
}
return(ColorConversion.GetColorFromHSL(hsl.h, hsl.s, hsl.l));
}
case Brush.Noise: {
if (originalColor.a == 0)
{
return(originalColor);
}
HSLColor hsl = ColorConversion.GetHSLFromRGB(originalColor.r, originalColor.g, originalColor.b);
hsl.l += Random.value * 0.1f - 0.05f;
if (hsl.l > 0.99f)
{
hsl.l = 0.99f;
}
else if (hsl.l < 0.01f)
{
hsl.l = 0.01f;
}
return(ColorConversion.GetColorFromHSL(hsl.h, hsl.s, hsl.l));
}
case Brush.NoiseTone: {
if (originalColor.a == 0)
{
return(originalColor);
}
HSLColor hsl = ColorConversion.GetHSLFromRGB(originalColor.r, originalColor.g, originalColor.b);
hsl.h += Random.value * 0.1f - 0.05f;
if (hsl.h > 0.99f)
{
hsl.l = 0.99f;
}
else if (hsl.h < 0.01f)
{
hsl.h = 0.01f;
}
return(ColorConversion.GetColorFromHSL(hsl.h, hsl.s, hsl.l));
}
case Brush.Gradient: {
HSLColor hsl = ColorConversion.GetHSLFromRGB(_brushColor.r, _brushColor.g, _brushColor.b);
int distance = Mathf.Max(Mathf.Abs(startTexelPos.x - currentTexelPos.x), Mathf.Abs(startTexelPos.y - currentTexelPos.y));
if (distance > 0)
{
hsl.l -= 0.05f * distance;
if (hsl.l < 0.01f)
{
hsl.l = 0.01f;
}
return(ColorConversion.GetColorFromHSL(hsl.h, hsl.s, hsl.l));
}
return(_brushColor);
}
}
return(_brushColor);
}