c3007a980e
- Improved the gl shader bytes generation alot, their now way smaller and kinda safe against outside manipulation
319 lines
10 KiB
C#
319 lines
10 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.IO;
|
|
using ANX.Framework.Graphics;
|
|
using ANX.Framework.NonXNA;
|
|
using OpenTK.Graphics.OpenGL;
|
|
using System.Text;
|
|
using System.Security.Cryptography;
|
|
|
|
#region License
|
|
|
|
//
|
|
// This file is part of the ANX.Framework created by the "ANX.Framework developer group".
|
|
//
|
|
// This file is released under the Ms-PL license.
|
|
//
|
|
//
|
|
//
|
|
// Microsoft Public License (Ms-PL)
|
|
//
|
|
// This license governs use of the accompanying software. If you use the software, you accept this license.
|
|
// If you do not accept the license, do not use the software.
|
|
//
|
|
// 1.Definitions
|
|
// The terms "reproduce," "reproduction," "derivative works," and "distribution" have the same meaning
|
|
// here as under U.S. copyright law.
|
|
// A "contribution" is the original software, or any additions or changes to the software.
|
|
// A "contributor" is any person that distributes its contribution under this license.
|
|
// "Licensed patents" are a contributor's patent claims that read directly on its contribution.
|
|
//
|
|
// 2.Grant of Rights
|
|
// (A) Copyright Grant- Subject to the terms of this license, including the license conditions and limitations
|
|
// in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to
|
|
// reproduce its contribution, prepare derivative works of its contribution, and distribute its contribution
|
|
// or any derivative works that you create.
|
|
// (B) Patent Grant- Subject to the terms of this license, including the license conditions and limitations in
|
|
// section 3, each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed
|
|
// patents to make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution
|
|
// in the software or derivative works of the contribution in the software.
|
|
//
|
|
// 3.Conditions and Limitations
|
|
// (A) No Trademark License- This license does not grant you rights to use any contributors' name, logo, or trademarks.
|
|
// (B) If you bring a patent claim against any contributor over patents that you claim are infringed by the software, your
|
|
// patent license from such contributor to the software ends automatically.
|
|
// (C) If you distribute any portion of the software, you must retain all copyright, patent, trademark, and attribution
|
|
// notices that are present in the software.
|
|
// (D) If you distribute any portion of the software in source code form, you may do so only under this license by including
|
|
// a complete copy of this license with your distribution. If you distribute any portion of the software in compiled or
|
|
// object code form, you may only do so under a license that complies with this license.
|
|
// (E) The software is licensed "as-is." You bear the risk of using it. The contributors give no express warranties, guarantees,
|
|
// or conditions. You may have additional consumer rights under your local laws which this license cannot change. To the
|
|
// extent permitted under your local laws, the contributors exclude the implied warranties of merchantability, fitness for a
|
|
// particular purpose and non-infringement.
|
|
|
|
#endregion // License
|
|
|
|
namespace ANX.Framework.Windows.GL3
|
|
{
|
|
/// <summary>
|
|
/// Native OpenGL Effect implementation.
|
|
/// </summary>
|
|
public class EffectGL3 : INativeEffect
|
|
{
|
|
#region Constants
|
|
private const string FragmentSeparator = "##!fragment!##";
|
|
#endregion
|
|
|
|
#region Private
|
|
/// <summary>
|
|
/// The native shader handle.
|
|
/// </summary>
|
|
private int programHandle;
|
|
#endregion
|
|
|
|
#region Public
|
|
#region Techniques (TODO)
|
|
public IEnumerable<EffectTechnique> Techniques
|
|
{
|
|
get
|
|
{
|
|
List<EffectTechnique> techniques = new List<EffectTechnique>();
|
|
|
|
// TODO: dummy, fill with actual data.
|
|
techniques.Add(new EffectTechnique());
|
|
|
|
return techniques;
|
|
}
|
|
}
|
|
#endregion
|
|
|
|
#region Parameters (TODO)
|
|
public IEnumerable<EffectParameter> Parameters
|
|
{
|
|
get
|
|
{
|
|
List<EffectParameter> parameters = new List<EffectParameter>();
|
|
|
|
int uniformCount;
|
|
GL.GetProgram(programHandle, ProgramParameter.ActiveUniforms, out uniformCount);
|
|
|
|
string[] uniformNames = new string[uniformCount];
|
|
int[] uniformIndices = new int[uniformCount];
|
|
|
|
//TODO: this command doesn't work ?!?! -> GL.GetUniformIndices(programHandle, uniformCount, uniformNames, uniformIndices);
|
|
|
|
|
|
// TODO: dummy, fill with actual data.
|
|
parameters.Add(new EffectParameter());
|
|
|
|
return parameters;
|
|
}
|
|
}
|
|
#endregion
|
|
#endregion
|
|
|
|
#region Constructor
|
|
/// <summary>
|
|
/// Create a new effect instance of separate streams.
|
|
/// </summary>
|
|
/// <param name="vertexShaderByteCode">The vertex shader code.</param>
|
|
/// <param name="pixelShaderByteCode">The fragment shader code.</param>
|
|
public EffectGL3(Stream vertexShaderByteCode,
|
|
Stream pixelShaderByteCode)
|
|
{
|
|
CreateShader(LoadShaderCode(vertexShaderByteCode),
|
|
LoadShaderCode(pixelShaderByteCode));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Create a new effect instance of one streams.
|
|
/// </summary>
|
|
/// <param name="byteCode">The byte code of the shader.</param>
|
|
public EffectGL3(Stream byteCode)
|
|
{
|
|
string source = LoadShaderCode(byteCode);
|
|
string[] parts = source.Split(new string[] { FragmentSeparator },
|
|
StringSplitOptions.RemoveEmptyEntries);
|
|
|
|
CreateShader(parts[0], parts[1]);
|
|
}
|
|
#endregion
|
|
|
|
#region CreateShader
|
|
private void CreateShader(string vertexSource, string fragmentSource)
|
|
{
|
|
int vertexShader = GL.CreateShader(ShaderType.VertexShader);
|
|
string vertexError = CompileShader(vertexShader, vertexSource);
|
|
if (String.IsNullOrEmpty(vertexError) == false)
|
|
{
|
|
throw new InvalidDataException("Failed to compile the vertex " +
|
|
"shader because of: " + vertexError);
|
|
}
|
|
|
|
int fragmentShader = GL.CreateShader(ShaderType.FragmentShader);
|
|
string fragmentError = CompileShader(fragmentShader, fragmentSource);
|
|
if (String.IsNullOrEmpty(fragmentError) == false)
|
|
{
|
|
throw new InvalidDataException("Failed to compile the fragment " +
|
|
"shader because of: " + fragmentError);
|
|
}
|
|
|
|
programHandle = GL.CreateProgram();
|
|
GL.AttachShader(programHandle, vertexShader);
|
|
GL.AttachShader(programHandle, fragmentShader);
|
|
GL.LinkProgram(programHandle);
|
|
|
|
int result;
|
|
GL.GetProgram(programHandle, ProgramParameter.LinkStatus, out result);
|
|
if (result == 0)
|
|
{
|
|
string programError;
|
|
GL.GetProgramInfoLog(programHandle, out programError);
|
|
throw new InvalidDataException("Failed to link the shader program " +
|
|
"because of: " + programError);
|
|
}
|
|
}
|
|
#endregion
|
|
|
|
#region CompileShader
|
|
private string CompileShader(int shader, string source)
|
|
{
|
|
GL.ShaderSource(shader, source);
|
|
GL.CompileShader(shader);
|
|
|
|
int result;
|
|
GL.GetShader(shader, ShaderParameter.CompileStatus, out result);
|
|
if (result == 0)
|
|
{
|
|
string error = "";
|
|
GL.GetShaderInfoLog(shader, out error);
|
|
|
|
GL.DeleteShader(shader);
|
|
|
|
return error;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
#endregion
|
|
|
|
#region CompileShader (for external)
|
|
public static byte[] CompileShader(string effectCode)
|
|
{
|
|
#region Source Cleanup
|
|
// We wanna clean up the shader a little bit, so we remove
|
|
// empty lines, spaces and tabs at beginning and end and also
|
|
// remove comments.
|
|
List<string> lines = new List<string>(effectCode.Split('\n'));
|
|
for (int index = lines.Count - 1; index >= 0; index--)
|
|
{
|
|
lines[index] = lines[index].Trim();
|
|
if (String.IsNullOrEmpty(lines[index]) ||
|
|
lines[index].StartsWith("//"))
|
|
{
|
|
lines.RemoveAt(index);
|
|
continue;
|
|
}
|
|
|
|
// TODO: add /**/ comment checking and removing.
|
|
}
|
|
|
|
effectCode = "";
|
|
foreach (string line in lines)
|
|
{
|
|
effectCode += line + "\n";
|
|
}
|
|
|
|
// Now to some additional cleanup
|
|
string[] minimizables =
|
|
{
|
|
" * ", " = ", " + ", " / ", " - ", ", ",
|
|
};
|
|
|
|
foreach (string mizable in minimizables)
|
|
{
|
|
effectCode = effectCode.Replace(mizable, mizable.Trim());
|
|
}
|
|
|
|
effectCode = effectCode.Replace("\n{\n", "{\n");
|
|
effectCode = effectCode.Replace("\n}\n", "}\n");
|
|
#endregion
|
|
|
|
MemoryStream stream = new MemoryStream();
|
|
BinaryWriter writer = new BinaryWriter(stream);
|
|
|
|
// First of all writer the shader code (which is already preceeded
|
|
// by a length identifier, making it harder to manipulate the code)
|
|
writer.Write(effectCode);
|
|
|
|
// And now we additionally generate a sha hash so it nearly becomes
|
|
// impossible to manipulate the shader.
|
|
SHA512Managed sha = new SHA512Managed();
|
|
byte[] data = stream.ToArray();
|
|
byte[] hash = sha.ComputeHash(data);
|
|
// The hash is added to the end of the stream.
|
|
writer.Write(hash);
|
|
writer.Flush();
|
|
sha.Dispose();
|
|
|
|
return stream.ToArray();
|
|
}
|
|
#endregion
|
|
|
|
#region LoadShaderCode
|
|
private static string LoadShaderCode(Stream stream)
|
|
{
|
|
BinaryReader reader = new BinaryReader(stream);
|
|
// First load the source.
|
|
string source = reader.ReadString();
|
|
// And now check if it was manipulated.
|
|
SHA512Managed sha = new SHA512Managed();
|
|
int lengthRead = (int)stream.Position;
|
|
stream.Position = 0;
|
|
byte[] data = reader.ReadBytes(lengthRead);
|
|
byte[] hash = sha.ComputeHash(data);
|
|
sha.Dispose();
|
|
byte[] loadedHash = reader.ReadBytes(64);
|
|
for (int index = 0; index < hash.Length; index++)
|
|
{
|
|
if (hash[index] != loadedHash[index])
|
|
{
|
|
throw new InvalidDataException("Failed to load the shader " +
|
|
"because the data got manipulated!");
|
|
}
|
|
}
|
|
|
|
return source;
|
|
}
|
|
#endregion
|
|
|
|
#region Apply (TODO)
|
|
public void Apply(GraphicsDevice graphicsDevice)
|
|
{
|
|
throw new NotImplementedException();
|
|
}
|
|
#endregion
|
|
|
|
#region Dispose
|
|
/// <summary>
|
|
/// Dispose the native shader data.
|
|
/// </summary>
|
|
public void Dispose()
|
|
{
|
|
GL.DeleteProgram(programHandle);
|
|
|
|
int result;
|
|
GL.GetProgram(programHandle, ProgramParameter.DeleteStatus, out result);
|
|
if (result == 0)
|
|
{
|
|
string deleteError;
|
|
GL.GetProgramInfoLog(programHandle, out deleteError);
|
|
throw new Exception("Failed to delete the shader program because of: " +
|
|
deleteError);
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
}
|