using Microsoft.Xna.Framework.Graphics;

namespace Kav
{
    public class PaletteCrushEffect : Effect
    {
        EffectParameter textureParam;
        EffectParameter paletteParam;
        EffectParameter paletteWidthParam;

        Texture2D texture;
        Texture2D palette;

        int paletteWidth;

        public Texture2D Texture
        {
            get { return texture; }
            set 
            { 
                texture = value;
                textureParam.SetValue(texture); 
            }
        }

        public Texture2D Palette
        {
            get { return palette; }
            set
            {
                palette = value;
                paletteWidth = palette.Width;
                paletteParam.SetValue(palette);
                paletteWidthParam.SetValue(paletteWidth);
            }
        }

        public PaletteCrushEffect(GraphicsDevice graphicsDevice) : base(graphicsDevice, Resources.PaletteCrushEffect)
        {
            CacheEffectParameters();
        }

        void CacheEffectParameters()
        {
            textureParam = Parameters["Texture"];
            paletteParam = Parameters["Palette"];

            paletteWidthParam = Parameters["PaletteWidth"];
        }
    }
}