// Modified version of outline renderer feature by Alexander Ameye.
// https://alexanderameye.github.io/
// https://twitter.com/alexanderameye/status/1332286868222775298

using System;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;

public class OutlineFeature : ScriptableRendererFeature
{
    public Settings[] OutlineSettings;
    private OutlinePass[] _outlinePasses;
    private StencilPass[] _stencilPasses;

    [Serializable]
    public class Settings
    {
        [Header("Visual")]
        [ColorUsage(true, true)]
        public Color Color = new Color(0.2f, 0.4f, 1, 1f);

        [Range(0.0f, 5.0f)]
        public float Width = 4f;

        [Header("Rendering")]
        public LayerMask LayerMask = -1;

        // TODO: Try this again when render layers are working with hybrid renderer.
        // [Range(0, 32)]
        // public int RenderLayer = 1;

        public RenderPassEvent RenderPassEvent = RenderPassEvent.AfterRenderingTransparents;

        public SortingCriteria SortingCriteria = SortingCriteria.CommonOpaque;
    }

    public override void Create()
    {
        _stencilPasses = new StencilPass[OutlineSettings.Length];
        _outlinePasses = new OutlinePass[OutlineSettings.Length];
        for (int i = 0; i < OutlineSettings.Length; i++)
        {
            Settings settings = OutlineSettings[i];
            _stencilPasses[i] = new StencilPass(settings);
            _outlinePasses[i] = new OutlinePass(settings);
        }
    }

    public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
    {
        for (int i = 0; i < _outlinePasses.Length; i++)
        {
            renderer.EnqueuePass(_stencilPasses[i]);
            renderer.EnqueuePass(_outlinePasses[i]);
        }
    }
}