stgsharp/内核源代码/StgSharp.Common/Graphics/OpenGL/Buffer/VBO.cs

//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//     file="VBO.cs"
//     Project: StgSharp
//     AuthorGroup: Nitload Space
//     Copyright (c) Nitload Space. 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, 
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//     
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
using StgSharp.Math;

using System;
using System.Collections.Generic;
using System.Net.Security;
using System.Numerics;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;

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

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

        public override sealed void Bind( int index )
        {
            GL.BindBuffer( BufferType.ArrayBuffer, _bufferHandle[ index ] );
        }

        /// <summary>
        ///
        /// </summary>
        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public void Unbind()
        {
            GL.BindBuffer( BufferType.ArrayBuffer, GlHandle.Zero );
        }

        /// <summary>
        /// Set _data to current vertex Buffer object
        /// </summary>
        /// <typeparam _name="T"> Type of bufferData </typeparam>
        /// <param _name="index"> Index to find certain VBO in this instance </param>
        /// <param _name="bufferData"> Data to write in </param>
        /// <param _name="usage"> How OpenGL use these _data, defined by <see cref="BufferUsage" /></param>
        public void WriteMatrixData<T>(
            int index,
            T bufferData,
            BufferUsage usage )
            where T: struct, IMat
        {
            GL.BindBuffer( BufferType.ArrayBuffer, _bufferHandle[ index ] );
            GL.SetBufferData( BufferType.ArrayBuffer, bufferData, usage );
        }

        /// <summary>
        /// Set _data to current vertex Buffer object
        /// </summary>
        /// <typeparam _name="T"> Type of bufferData </typeparam>
        /// <param _name="index"> Index to find certain VBO in this instance </param>
        /// <param _name="bufferArray"> Data to write in </param>
        /// <param _name="usage"> How OpenGL use these _data, defined by <see cref="BufferUsage" /></param>
        public void WriteScalerData<T>(
            int index,
            T[] bufferArray,
            BufferUsage usage )
            where T: struct, INumber<T>
        {
            GL.BindBuffer( BufferType.ArrayBuffer, _bufferHandle[ index ] );
            GL.SetBufferData( BufferType.ArrayBuffer, bufferArray, usage );
        }

        /// <summary>
        /// Set _data to current vertex Buffer object
        /// </summary>
        /// <typeparam _name="T"> Type of bufferData </typeparam>
        /// <param _name="index"> Index to find certain VBO in this instance </param>
        /// <param _name="scalerSpan"> A <see cref="Span{T}" /> of _data to write in </param>
        /// <param _name="usage"> How OpenGL use these _data, defined by <see cref="BufferUsage" /></param>
        public void WriteScalerData<T>(
            int index,
            ReadOnlySpan<T> scalerSpan,
            BufferUsage usage )
            where T: struct,INumber<T>
        {
            GL.BindBuffer( BufferType.ArrayBuffer, _bufferHandle[ index ] );
            GL.SetBufferData( BufferType.ArrayBuffer, scalerSpan, usage );
        }

        /// <summary>
        /// Set _data to current vertex Buffer object
        /// </summary>
        /// <typeparam _name="T"> Type of bufferData </typeparam>
        /// <param _name="index"> Index to find certain VBO in this instance </param>
        /// <param _name="vectorSpan"> A <see cref="Span{T}" /> of _data to write in </param>
        /// <param _name="usage"> How OpenGL use these _data, defined by <see cref="BufferUsage" /></param>
        public void WriteVectorData<T>(
            int index,
            ReadOnlySpan<T> vectorSpan,
            BufferUsage usage )
            where T: struct, IVector
        {
            GL.BindBuffer( BufferType.ArrayBuffer, _bufferHandle[ index ] );
            GL.SetBufferVectorData( BufferType.ArrayBuffer, vectorSpan, usage );
        }

        /// <summary>
        /// Set _data to current vertex Buffer object
        /// </summary>
        /// <typeparam _name="T"> Type of bufferData </typeparam>
        /// <param _name="index"> Index to find certain VBO in this instance </param>
        /// <param _name="vectorArray"> A array of _data to write in </param>
        /// <param _name="usage"> How OpenGL use these _data, defined by <see cref="BufferUsage" /></param>
        public void WriteVectorData<T>(
            int index,
            T[] vectorArray,
            BufferUsage usage )
            where T: struct, IVector
        {
            GL.BindBuffer( BufferType.ArrayBuffer, _bufferHandle[ index ] );
            GL.SetBufferVectorData( BufferType.ArrayBuffer, vectorArray,
                                    usage );
        }

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

    }
}