void OnGUI()
{
GUILayout.Label("Convert a texture to 8bits", EditorStyles.boldLabel);
sourceTexture = (Texture2D)EditorGUILayout.ObjectField("Source Texture", sourceTexture, typeof(Texture2D), false);
palTexture = (Texture2D)EditorGUILayout.ObjectField("Palette Texture", palTexture, typeof(Texture2D), false);
path = EditorGUILayout.TextField("Destination Path", path);
ditherMode = (DitherMode)EditorGUILayout.EnumPopup("Dither Mode", ditherMode);
if (GUILayout.Button("Convert"))
{
var palette = new ColorTable();
palette.LoadFromTexture(palTexture);
var indices = palette.ApplyToTextureAsIndices(sourceTexture, ditherMode);
var tex = new Texture2D(sourceTexture.width, sourceTexture.height, TextureFormat.ARGB32, false);
tex.filterMode = FilterMode.Point;
var colors = new Color32[indices.Length];
for (int i = 0; i < colors.Length; i++)
{
var index = indices[i];
if (index < 0)
{
colors[i] = Color.clear;
}
else
{
float n = index / (float)(palTexture.width - 1);
byte k = (byte)(n * 255);
colors[i] = new Color32(k, k, k, 255);
}
}
tex.SetPixels32(colors);
tex.Apply();
string targetPath = string.IsNullOrEmpty(path) ? Application.dataPath : Path.Combine(Application.dataPath, path);
Directory.CreateDirectory(targetPath);
//var targetPath = "Assets";
string fileName = sourceTexture.name;
string tag = "_" + palTexture.name;
if (!fileName.Contains(tag))
{
fileName += tag;
}
fileName += ".png";
targetPath = Path.Combine(targetPath, fileName);
Debug.Log("Trying export 8bit texture to " + targetPath);
/*AssetDatabase.CreateAsset(tex, targetPath);
* var sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), new Vector2(0.5f, 0.5f));
* AssetDatabase.CreateAsset(sprite, targetPath.Replace("_8bit", "_spr"));*/
File.WriteAllBytes(targetPath, tex.EncodeToPNG());
AssetDatabase.Refresh();
/*Texture2D temp = (Texture2D)AssetDatabase.LoadAssetAtPath(targetPath, typeof(Texture2D));
* temp.filterMode = FilterMode.Point;
*
* AssetDatabase.SaveAssets();*/
}
}