cirnogodot/Scripts/Components/Actors/3D/OutlineEffect.cs

using Godot;

namespace Cirno.Scripts.Components.Actors._3D;

[Tool]
public partial class OutlineEffect : CompositorEffect
{
    private RenderingDevice RenderingDevice => RenderingServer.GetRenderingDevice();

    private Rid _shader;
    private Rid _pipeline;

    private Rid _parameterStorageBuffer;

    // tutorial: https://www.youtube.com/watch?v=PQHExF-sbB4
    
    public OutlineEffect()
    {
        var shaderFile = GD.Load<RDShaderFile>("res://Shaders/outline3D.glsl");

        var shaderSpirv = shaderFile.GetSpirV();

        _shader = RenderingDevice.ShaderCreateFromSpirV(shaderSpirv);

        _pipeline = RenderingDevice.ComputePipelineCreate(_shader);

        byte[] parameterData = [0, 0, 0, 0];

        _parameterStorageBuffer = RenderingDevice.StorageBufferCreate((uint)parameterData.Length, parameterData);
    }

    public override void _RenderCallback(int effectCallbackType, RenderData renderData)
    {
        //base._RenderCallback(effectCallbackType, renderData);
        var renderSceneBuffers = renderData.GetRenderSceneBuffers();

        if (renderSceneBuffers is null)
        {
            return;
        }
        
        //var size = renderSceneBuffers.get
    }
}