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#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2009 the Open Toolkit library.
//
// 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.
//
#endregion
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
namespace OpenTK.Graphics
{
// Used in debug-mode only, for automatic OpenGL error-checking.
//
// Works like this: an instance is created before each OpenGL function is called.
// The constructor resets the OpenGL error state. Once the native function returns,
// the error state is checked again, raising the relevant exceptions.
//
// A using-region is used to ensure Dispose() is called.
//
// Make sure that no error checking is added to the GetError function,
// as that would cause infinite recursion!
[Obsolete]
struct ErrorHelper : IDisposable
{
#region Fields
static readonly object SyncRoot = new object();
static readonly Dictionary<GraphicsContext, List<ErrorCode>> ContextErrors =
new Dictionary<GraphicsContext, List<ErrorCode>>();
readonly GraphicsContext Context;
#endregion
#region Constructors
public ErrorHelper(IGraphicsContext context)
{
if (context == null)
throw new GraphicsContextMissingException();
Context = (GraphicsContext)context;
lock (SyncRoot)
{
if (!ContextErrors.ContainsKey(Context))
ContextErrors.Add(Context, new List<ErrorCode>());
}
ResetErrors();
}
#endregion
#region Public Members
// Retrieve all OpenGL errors to clear the error list.
// See http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/geterror.html
[Conditional("DEBUG")]
internal void ResetErrors()
{
if (Context.ErrorChecking)
{
while (GL.GetError() != ErrorCode.NoError)
{ }
}
}
// Retrieve all OpenGL errors and throw an exception if anything other than NoError is returned.
[Conditional("DEBUG")]
internal void CheckErrors()
{
if (Context.ErrorChecking)
{
List<ErrorCode> error_list = ContextErrors[Context];
error_list.Clear();
ErrorCode error;
do
{
error = GL.GetError();
error_list.Add(error);
} while (error != ErrorCode.NoError);
if (error_list.Count != 1)
{
StringBuilder sb = new StringBuilder();
foreach (ErrorCode e in error_list)
{
if (e != ErrorCode.NoError)
{
sb.Append(e.ToString());
sb.Append(", ");
}
else
break;
}
sb.Remove(sb.Length - 2, 2); // Remove the last comma
throw new GraphicsErrorException(sb.ToString());
}
}
}
#endregion
#region IDisposable Members
public void Dispose()
{
CheckErrors();
}
#endregion
}
}
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