277 lines
8.4 KiB
C#
277 lines
8.4 KiB
C#
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//using System;
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//using System.Collections.Generic;
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//using System.Linq;
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//using System.Text;
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//using System.Threading.Tasks;
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//using System.Runtime.InteropServices;
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//using System.Reflection;
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//using OpenTK;
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//using OpenTK.Graphics;
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//using OpenTK.Graphics.OpenGL;
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//using Essgee.Exceptions;
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//namespace Essgee.Graphics
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//{
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// public class VertexBuffer : IDisposable
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// {
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// static readonly Dictionary<Type, VertexAttribPointerType> pointerTypeTranslator = new Dictionary<Type, VertexAttribPointerType>()
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// {
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// { typeof(byte), VertexAttribPointerType.UnsignedByte },
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// { typeof(sbyte), VertexAttribPointerType.Byte },
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// { typeof(ushort), VertexAttribPointerType.UnsignedShort },
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// { typeof(short), VertexAttribPointerType.Short },
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// { typeof(uint), VertexAttribPointerType.UnsignedInt },
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// { typeof(int), VertexAttribPointerType.Int },
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// { typeof(float), VertexAttribPointerType.Float },
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// { typeof(double), VertexAttribPointerType.Double },
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// { typeof(Vector2), VertexAttribPointerType.Float },
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// { typeof(Vector3), VertexAttribPointerType.Float },
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// { typeof(Vector4), VertexAttribPointerType.Float },
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// { typeof(Color4), VertexAttribPointerType.Float }
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// };
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// static readonly Dictionary<Type, string> glslTypeTranslator = new Dictionary<Type, string>()
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// {
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// { typeof(uint), "uint" },
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// { typeof(int), "int" },
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// { typeof(float), "float" },
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// { typeof(double), "double" },
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// { typeof(Vector2), "vec2" },
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// { typeof(Vector3), "vec3" },
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// { typeof(Vector4), "vec4" },
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// { typeof(Color4), "vec4" }
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// };
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// static readonly Dictionary<Type, DrawElementsType> drawElementsTypeTranslator = new Dictionary<Type, DrawElementsType>()
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// {
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// { typeof(byte), DrawElementsType.UnsignedByte },
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// { typeof(ushort), DrawElementsType.UnsignedShort },
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// { typeof(uint), DrawElementsType.UnsignedInt }
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// };
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// readonly int vaoHandle, vboHandle;
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// int numElementsToDraw;
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// PrimitiveType primitiveType;
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// int elementBufferHandle;
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// DrawElementsType drawElementsType;
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// List<VertexElement> vertexElements;
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// int vertexStructSize;
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// bool disposed = false;
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// public VertexBuffer()
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// {
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// vaoHandle = GL.GenVertexArray();
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// vboHandle = GL.GenBuffer();
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// numElementsToDraw = -1;
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// primitiveType = PrimitiveType.Triangles;
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// elementBufferHandle = -1;
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// drawElementsType = DrawElementsType.UnsignedByte;
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// vertexElements = null;
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// vertexStructSize = -1;
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// }
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// ~VertexBuffer()
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// {
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// Dispose(false);
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// }
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// public void Dispose()
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// {
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// Dispose(true);
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// GC.SuppressFinalize(this);
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// }
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// protected virtual void Dispose(bool disposing)
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// {
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// if (disposed)
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// return;
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// if (disposing)
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// {
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// if (GL.IsVertexArray(vaoHandle))
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// GL.DeleteVertexArray(vaoHandle);
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// if (GL.IsBuffer(vboHandle))
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// GL.DeleteBuffer(vboHandle);
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// if (GL.IsBuffer(elementBufferHandle))
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// GL.DeleteBuffer(elementBufferHandle);
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// }
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// disposed = true;
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// }
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// public static (List<VertexElement>, int) DeconstructVertexLayout<T>() where T : struct, IVertexStruct
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// {
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// return DeconstructVertexLayout(typeof(T));
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// }
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// public static (List<VertexElement>, int) DeconstructVertexLayout(Type vertexType)
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// {
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// if (!typeof(IVertexStruct).IsAssignableFrom(vertexType)) throw new Exceptions.GraphicsException("Cannot deconstruct layout of non-vertex type");
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// var elements = new List<VertexElement>();
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// var structSize = Marshal.SizeOf(vertexType);
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// foreach (var field in vertexType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
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// {
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// var attribs = field.GetCustomAttributes(typeof(VertexElementAttribute), false);
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// if (attribs == null || attribs.Length != 1) continue;
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// var elementAttribute = (attribs[0] as VertexElementAttribute);
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// var numComponents = Marshal.SizeOf(field.FieldType);
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// if (field.FieldType.IsValueType && !field.FieldType.IsEnum)
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// {
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// var structFields = field.FieldType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
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// if (structFields == null || structFields.Length < 1 || structFields.Length > 4) throw new Exceptions.GraphicsException("Invalid number of fields in struct");
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// numComponents = structFields.Length;
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// }
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// elements.Add(new VertexElement()
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// {
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// AttributeIndex = elementAttribute.AttributeIndex,
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// DataType = field.FieldType,
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// NumComponents = numComponents,
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// OffsetInVertex = Marshal.OffsetOf(vertexType, field.Name).ToInt32(),
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// Name = field.Name
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// });
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// }
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// return (elements, structSize);
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// }
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// public void SetPrimitiveType(PrimitiveType primType)
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// {
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// primitiveType = primType;
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// }
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// public PrimitiveType GetPrimitiveType()
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// {
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// return primitiveType;
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// }
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// public void SetVertexData<TVertex>(TVertex[] vertices) where TVertex : struct, IVertexStruct
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// {
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// (vertexElements, vertexStructSize) = DeconstructVertexLayout<TVertex>();
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// GL.BindVertexArray(vaoHandle);
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// GL.BindBuffer(BufferTarget.ArrayBuffer, vboHandle);
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// GL.BufferData(BufferTarget.ArrayBuffer, new IntPtr(vertexStructSize * vertices.Length), vertices, BufferUsageHint.StaticDraw);
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// foreach (var element in vertexElements)
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// {
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// GL.EnableVertexAttribArray(element.AttributeIndex);
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// GL.VertexAttribPointer(element.AttributeIndex, element.NumComponents, GetVertexAttribPointerType(element.DataType), false, vertexStructSize, element.OffsetInVertex);
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// }
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// numElementsToDraw = vertices.Length;
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// GL.BindVertexArray(0);
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// }
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// public void SetIndices<TIndex>(TIndex[] indices) where TIndex : struct, IConvertible
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// {
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// drawElementsType = GetDrawElementsType(typeof(TIndex));
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// if (elementBufferHandle == -1)
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// elementBufferHandle = GL.GenBuffer();
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// GL.BindBuffer(BufferTarget.ElementArrayBuffer, elementBufferHandle);
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// GL.BufferData(BufferTarget.ElementArrayBuffer, new IntPtr(Marshal.SizeOf(typeof(TIndex)) * indices.Length), indices, BufferUsageHint.StaticDraw);
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// numElementsToDraw = indices.Length;
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// }
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// private VertexAttribPointerType GetVertexAttribPointerType(Type type)
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// {
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// if (pointerTypeTranslator.ContainsKey(type))
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// return pointerTypeTranslator[type];
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// else
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// throw new ArgumentException("Unimplemented or unsupported vertex attribute pointer type");
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// }
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// private DrawElementsType GetDrawElementsType(Type type)
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// {
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// if (drawElementsTypeTranslator.ContainsKey(type))
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// return drawElementsTypeTranslator[type];
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// else
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// throw new ArgumentException("Unsupported draw elements type");
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// }
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// private static string GetGlslDataType(Type type)
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// {
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// if (glslTypeTranslator.ContainsKey(type))
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// return glslTypeTranslator[type];
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// else
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// throw new ArgumentException("Unimplemented or unsupported GLSL data type");
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// }
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// public string GetShaderPreamble(string prefix = "in")
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// {
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// return GetShaderPreamble(vertexElements, prefix);
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// }
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// public static string GetShaderPreamble(List<VertexElement> vertexElements, string prefix = "in")
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// {
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// var stringBuilder = new StringBuilder();
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// for (int i = 0; i < vertexElements.Count; i++)
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// {
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// var element = vertexElements[i];
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// stringBuilder.AppendLine($"layout(location = {element.AttributeIndex}) in {GetGlslDataType(element.DataType)} {prefix}{element.Name};");
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// }
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// return stringBuilder.ToString();
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// }
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// public void Render()
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// {
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// GL.BindVertexArray(vaoHandle);
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// if (elementBufferHandle != -1)
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// {
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// GL.BindBuffer(BufferTarget.ElementArrayBuffer, elementBufferHandle);
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// GL.DrawElements(primitiveType, numElementsToDraw, drawElementsType, 0);
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// }
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// else
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// GL.DrawArrays(primitiveType, 0, numElementsToDraw);
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// }
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// }
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// public interface IVertexStruct { }
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// [AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
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// public class VertexElementAttribute : Attribute
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// {
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// public int AttributeIndex { get; set; }
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// public VertexElementAttribute()
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// {
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// AttributeIndex = -1;
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// }
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// }
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// [StructLayout(LayoutKind.Sequential, Pack = 1)]
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// public struct CommonVertex : IVertexStruct
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// {
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// [VertexElement(AttributeIndex = 0)]
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// public Vector3 Position;
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// [VertexElement(AttributeIndex = 1)]
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// public Vector3 Normal;
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// [VertexElement(AttributeIndex = 2)]
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// public Color4 Color;
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// [VertexElement(AttributeIndex = 3)]
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// public Vector2 TexCoord;
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// }
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//}
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