using System;
using UnityEngine;
using UnityEngine.Rendering.PostProcessing;

[Serializable]
[PostProcess(typeof(HalfToneOpaqueRenderer), PostProcessEvent.BeforeStack, "Custom/LWtest/Haltone Opaque")]
public sealed class HalfToneOpaque : PostProcessEffectSettings
{
    [Range(-2f, 2f), Tooltip("Pattern Midpoint")]
    public FloatParameter midpoint = new FloatParameter { value = 0f };
    [Range(0.001f, 0.1f), Tooltip("Pattern Scale")]
    public FloatParameter scale = new FloatParameter { value = 0.025f };
    [Range(1, 10), Tooltip("Steps")]
    public IntParameter steps = new IntParameter { value = 4};
    public TextureParameter pattern = new TextureParameter { value = null};
}

public sealed class HalfToneOpaqueRenderer : PostProcessEffectRenderer<HalfToneOpaque>
{
    public override void Render(PostProcessRenderContext context)
    {
        var sheet = context.propertySheets.Get(Shader.Find("Hidden/Custom/LWtest/HalftoneOpaque"));
        sheet.properties.SetTexture("_Pattern", settings.pattern);
        sheet.properties.SetFloat("_Blend", settings.midpoint);
        sheet.properties.SetFloat("_Scale", settings.scale);
        sheet.properties.SetFloat("_Steps", settings.steps);
        context.command.BlitFullscreenTriangle(context.source, context.destination, sheet, 0);
    }
}