using RefreshCS;
using System;

namespace MoonWorks.Graphics
{
    /// <summary>
    /// Shader modules expect input in SPIR-V bytecode format.
    /// </summary>
    public class ShaderModule : GraphicsResource
    {
        protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyShaderModule;

        public unsafe ShaderModule(GraphicsDevice device, string filePath) : base(device)
        {
            var bytecode = Bytecode.ReadBytecodeAsUInt32(filePath);

            fixed (uint* ptr = bytecode)
            {
                Refresh.ShaderModuleCreateInfo shaderModuleCreateInfo;
                shaderModuleCreateInfo.codeSize = (UIntPtr) (bytecode.Length * sizeof(uint));
                shaderModuleCreateInfo.byteCode = (IntPtr) ptr;

                Handle = Refresh.Refresh_CreateShaderModule(device.Handle, shaderModuleCreateInfo);
            }
        }
    }
}