67 lines
1.9 KiB
C#
67 lines
1.9 KiB
C#
using StgSharp.Math;
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using System;
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using System.Collections.Generic;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace StgSharp.Graphics
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{
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public partial class Form
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{
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/// <summary>
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/// Create a set of <see cref="ElementBuffer"/>.
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/// </summary>
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/// <param name="count">Amount of EBO to be created.</param>
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/// <returns></returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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protected ElementBuffer CreateElementBuffer(uint count)
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{
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return new ElementBuffer(count, this.gl);
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}
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}
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/// <summary>
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/// A collecion of handle to Element Buffer Object in OpenGL.
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/// Each <see cref="uint"/> value indexed from instance of this class this
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/// is the only handle to one Element Buffer Object.
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/// </summary>
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public unsafe class ElementBuffer : IBufferObject
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{
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internal ElementBuffer(uint n, IglFunc gl)
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{
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_bufferID = new uint[n];
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GL = gl;
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fixed (uint* id = _bufferID)
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{
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GL.GenBuffers(n, id);
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}
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}
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public uint this[int n]
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{
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get { return _bufferID[n]; }
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}
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public override void Bind(int index)
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{
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GL.BindBuffer(BufferType.ELEMENT_ARRAY_BUFFER, _bufferID[index]);
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}
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public void SetValue<T>(int index, T[] bufferArray, BufferUsage usage)
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where T : struct, IConvertible
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{
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GL.BindBuffer(BufferType.ELEMENT_ARRAY_BUFFER, _bufferID[index]);
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GL.SetBufferData(BufferType.ELEMENT_ARRAY_BUFFER, bufferArray, usage);
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}
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protected sealed override void Dispose(bool disposing)
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{
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if (disposing)
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{
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GL.DeleteBuffers((uint)_bufferID.Length, _bufferID);
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}
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}
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}
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}
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