Checking Mouse Click on a sprite

T2DStaticSprite sprite; // assume this points to something
ITextureMaterial mat = sprite.Material;
if (mat)
{
   // if we assume the material has been preloaded, 
   // we could get the Texture resource via: 
   // Resource<Texture> res = mat.Texture;
   // Texture2D bitmap = (Texture2D)res.Instance;

   // lets do it the hard way
   string textureFile = mat.BaseTex;
   Resource<Texture> res = GFXDevice.Instance.TextureManager.LoadTexture(textureFile);
   Texture2D bitmap = (Texture2D)res.Instance;

   // ... bitmap.GetData ...

   // if we called LoadTexture ourself, we need to cleanup the temp resource
   res.Invalidate();
}