namespace UnityEngine.PostProcessing;

public sealed class UserLutComponent : PostProcessingComponentRenderTexture<UserLutModel>
{
	private static class Uniforms
	{
		internal static readonly int _UserLut = Shader.PropertyToID("_UserLut");

		internal static readonly int _UserLut_Params = Shader.PropertyToID("_UserLut_Params");
	}

	public override bool active
	{
		get
		{
			UserLutModel.Settings settings = base.model.settings;
			return base.model.enabled && settings.lut != null && settings.contribution > 0f && settings.lut.height == (int)Mathf.Sqrt(settings.lut.width) && !context.interrupted;
		}
	}

	public override void Prepare(Material uberMaterial)
	{
		UserLutModel.Settings settings = base.model.settings;
		uberMaterial.EnableKeyword("USER_LUT");
		uberMaterial.SetTexture(Uniforms._UserLut, settings.lut);
		uberMaterial.SetVector(Uniforms._UserLut_Params, new Vector4(1f / (float)settings.lut.width, 1f / (float)settings.lut.height, (float)settings.lut.height - 1f, settings.contribution));
	}

	public void OnGUI()
	{
		UserLutModel.Settings settings = base.model.settings;
		Rect position = new Rect(context.viewport.x * (float)Screen.width + 8f, 8f, settings.lut.width, settings.lut.height);
		GUI.DrawTexture(position, settings.lut);
	}
}