public static List <Color32> ExtractPalette(string validImagePath, int numberOfColors)
{
byte[] fileData = System.IO.File.ReadAllBytes(validImagePath);
Texture2D tex = new Texture2D(2, 2);
tex.LoadImage(fileData);
int scaledSize = 128;
RenderTexture scaled = RenderTexture.GetTemporary(scaledSize, scaledSize);
Graphics.Blit(tex, scaled);
Texture2D smalltex = new Texture2D(scaledSize, scaledSize);
smalltex.ReadPixels(new Rect(0, 0, scaledSize, scaledSize), 0, 0);
RenderTexture.ReleaseTemporary(scaled);
PaletteExtractor extractor = new PaletteExtractor(smalltex);
List <Color32> extractedPalette = extractor.GetColors(numberOfColors);
return(extractedPalette);
}
void DrawExtractPaletteMedianCut()
{
if (GUILayout.Button("Extract Palette From Image", GUILayout.Width(200), GUILayout.Height(28)))
{
if (paletteImagePath == null)
{
paletteImagePath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop);
}
string imagePath = EditorUtility.OpenFilePanelWithFilters("Select Image File", paletteImagePath, new string[]
{
"JPG Image", "jpg",
"PNG Image", "png",
});
if (imagePath.Length > 0)
{
paletteImagePath = imagePath;
List <Color32> extractedPalette = PaletteExtractor.ExtractPalette(paletteImagePath, _target.numberOfColors);
_target.SetColors(extractedPalette);
dirty.forceDirty = true;
}
}
}