/// <summary>
/// This caches a sprite for easier look up and duplicate detection.
/// Each sprite is cached as a string.
/// </summary>
/// <param name="index">
/// Index where the sprite's cached value should be stored in the
/// <see cref="cache" /> array.
/// </param>
/// <param name="data">
/// An array of ints that represents the sprite's color data.
/// </param>
private void CacheSprite(int index, int[] data)
{
cache[index] = SpriteChipUtil.SpriteDataToString(data);
var totalPixels = width * height;
var tmpPixels = new int[totalPixels];
Array.Copy(data, tmpPixels, totalPixels);
pixelDataCache[index] = tmpPixels;
}
/// <summary>
/// Finds a sprite by looking it up against the cache. Returns -1 if no
/// sprite is found. This is used for insuring duplicate sprites aren't
/// added to the TextureData.
/// </summary>
/// <param name="pixels">
/// An array of ints representing the sprite's color data.
/// </param>
/// <returns>
/// </returns>
public int FindSprite(int[] pixels, bool emptyCheck = false)
{
if (emptyCheck)
{
if (IsEmpty(pixels))
{
return(-1);
}
}
var sprite = SpriteChipUtil.SpriteDataToString(pixels);
return(Array.IndexOf(cache, sprite));
}