static void Paletteize(string fileIn, string fileOut, bool debug)
{
var tex = AssetDatabase.LoadAssetAtPath <Texture2D>(fileIn);
if (tex == null)
{
Debug.Log($"bad path: {fileIn}");
return;
}
Dictionary <Color24, Color32> indices = new Dictionary <Color24, Color32>();
HashSet <Color24> colors = new HashSet <Color24>();
for (int i = 0; i < palette.Length; ++i)
{
Color24 col = palette[i];
colors.Add(col);
float tx = (i + .5f) / 8f;
byte b = (byte)(tx * 255);
indices.Add(col, new Color32(b, b, b, 255));
}
Color32[] pixels = tex.GetPixels32();
for (int i = 0; i < pixels.Length; ++i)
{
Color32 p = pixels[i];
Color24 col = p.Col24();
if (p.a == 0)
{
pixels[i] = new Color32(0, 0, 0, 0);
}
else
{
Color32 colOut;
if (debug)
{
if (colors.Contains(col))
{
colOut = new Color32(col.r, col.g, col.b, 255);
}
else
{
colOut = new Color32(255, 0, 255, 255);
}
}
else
{
if (!colors.Contains(col))
{
col = FindClosest(col, colors);
}
colOut = indices[col];
}
pixels[i] = colOut;
}
}
var texNew = new Texture2D(tex.width, tex.height, TextureFormat.RGBA32, false);
texNew.SetPixels32(pixels);
var bytes = texNew.EncodeToPNG();
string filename = fileOut;
if (debug)
{
filename += "-debug.png";
}
File.WriteAllBytes(filename, bytes);
}
