using System.Numerics;
using System.Runtime.InteropServices;

namespace Dashboard.Drawing.OpenGL
{
    public enum SimpleDrawCommand : int
    {
        Point = 1,
        Line = 2,
        Rect = 3,

        /// <summary>
        /// Make sure your custom commands have values higher than this if you plan on using the default command
        /// buffer.
        /// </summary>
        CustomCommandStart = 4096
    }

    [StructLayout(LayoutKind.Explicit, Size = 64)]
    public struct CommandInfo
    {
        [FieldOffset(0)]
        public SimpleDrawCommand Type;

        [FieldOffset(4)]
        public int Flags;

        [FieldOffset(8)]
        public float Arg0;
        [FieldOffset(12)]
        public float Arg1;

        [FieldOffset(16)]
        public int FgGradientIndex;
        [FieldOffset(20)]
        public int FgGradientCount;
        [FieldOffset(24)]
        public int BgGradientIndex;
        [FieldOffset(28)]
        public int BgGradientCount;

        [FieldOffset(32)]
        public Vector4 FgColor;

        [FieldOffset(48)]
        public Vector4 BgColor;
    }
}