using Unity.Toonshader;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.HighDefinition;

[HideInInspector]
public class UTSOutlinePass : DrawRenderersCustomPass
{
    private ShaderTagId outlineTag = new("Outline");

    protected override void Execute(CustomPassContext ctx)
    {
        var utsRenderer = ctx.hdCamera.volumeStack.GetComponent<UTSRenderer>();
        if (utsRenderer == null)
            return;

        if (!utsRenderer.enableOutline.value || !utsRenderer.enable.value)
            return;

        Shader.SetGlobalFloat("_Outline_MaxWidth", utsRenderer.outlineMaxWidth.value * 0.01f);

        var mask = RenderStateMask.Nothing;
        var stateBlock = new RenderStateBlock(mask)
        {
            depthState = new DepthState(depthWrite, depthCompareFunction),
            // We disable the stencil when the depth is overwritten but we don't write to it, to prevent writing to the stencil.
            stencilState = new StencilState(false),
        };

        var renderConfig = HDUtils.GetRendererConfiguration(false, false);
        var result = new UnityEngine.Rendering.RendererUtils.RendererListDesc(outlineTag, ctx.cullingResults, ctx.hdCamera.camera)
        {
            rendererConfiguration = renderConfig,
            renderQueueRange = GetRenderQueueRange(RenderQueueType.All),
            excludeObjectMotionVectors = false,
            stateBlock = stateBlock,
        };

        CoreUtils.DrawRendererList(ctx.renderContext, ctx.cmd, ctx.renderContext.CreateRendererList(result));
    }
}