using RefreshCS;

namespace MoonWorks.Graphics
{
	/// <summary>
	/// A texture slice specifies a subresource of a texture.
	/// </summary>
	public struct TextureSlice
	{
		public Texture Texture;
		public uint MipLevel;
		public uint Layer;

		public uint Size => (Texture.Width * Texture.Height * Texture.Depth * Texture.BytesPerPixel(Texture.Format) / Texture.BlockSizeSquared(Texture.Format)) >> (int) MipLevel;

		public TextureSlice(Texture texture)
		{
			Texture = texture;
			MipLevel = 0;
			Layer = 0;
		}

		public Refresh.TextureSlice ToRefreshTextureSlice()
		{
			return new Refresh.TextureSlice
			{
				texture = Texture.Handle,
				mipLevel = MipLevel,
				layer = Layer
			};
		}
	}
}