//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="VAO"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using StgSharp.Graphics;
using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Text;

namespace StgSharp.Graphics.OpenGL
{
    public sealed unsafe class VertexArray : GlBufferObjectBase
    {

        internal VertexArray(
                 int n,
                 glRender binding
        )
            : base(binding)
        {
            _bufferHandle = GL.GenVertexArrays(n);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public sealed override void Bind(
                                    int index
        )
        {
            GL.BindVertexArray(_bufferHandle[index]);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void BindNull()
        {
            OpenGLFunction.CurrentGL.BindVertexArray(GlHandle.Zero);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public void SetVertexAttribute(
                    uint attributeIndex,
                    int vertexLength,
                    TypeCode dataType,
                    bool isNomalized,
                    int stride,
                    int pointer
        )
        {
            GL.SetVertexAttribute(attributeIndex, vertexLength, dataType, isNomalized, stride,
                                  pointer);
        }

        protected sealed override void Dispose(
                                       bool disposing
        )
        {
            if (disposing) {
                GL.DeleteVertexArrays(_bufferHandle);
            }
        }

    }
}