134 lines
4.4 KiB
C#
134 lines
4.4 KiB
C#
#region License
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//
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// The Open Toolkit Library License
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//
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// Copyright (c) 2006 - 2009 the Open Toolkit library.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Diagnostics;
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namespace OpenTK.Graphics.ES20
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{
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// Used in debug-mode only, for automatic OpenGL error-checking.
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//
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// Works like this: an instance is created before each OpenGL function is called.
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// The constructor resets the OpenGL error state. Once the native function returns,
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// the error state is checked again, raising the relevant exceptions.
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//
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// A using-region is used to ensure Dispose() is called.
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//
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// Make sure that no error checking is added to the GetError function,
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// as that would cause infinite recursion!
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struct ErrorHelper : IDisposable
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{
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#region Fields
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static readonly object SyncRoot = new object();
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static readonly Dictionary<GraphicsContext, List<ErrorCode>> ContextErrors =
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new Dictionary<GraphicsContext, List<ErrorCode>>();
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readonly GraphicsContext Context;
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#endregion
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#region Constructors
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public ErrorHelper(IGraphicsContext context)
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{
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if (context == null)
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throw new GraphicsContextMissingException();
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Context = (GraphicsContext)context;
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lock (SyncRoot)
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{
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if (!ContextErrors.ContainsKey(Context))
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ContextErrors.Add(Context, new List<ErrorCode>());
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}
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ResetErrors();
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}
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#endregion
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#region Public Members
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// Retrieve all OpenGL errors to clear the error list.
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// See http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/geterror.html
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[Conditional("DEBUG")]
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internal void ResetErrors()
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{
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if (Context.ErrorChecking)
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{
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while ((ErrorCode)GL.GetError() != ErrorCode.NoError)
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{ }
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}
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}
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// Retrieve all OpenGL errors and throw an exception if anything other than NoError is returned.
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[Conditional("DEBUG")]
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internal void CheckErrors()
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{
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if (Context.ErrorChecking)
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{
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List<ErrorCode> error_list = ContextErrors[Context];
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error_list.Clear();
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ErrorCode error;
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do
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{
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error = (ErrorCode)GL.GetError();
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error_list.Add(error);
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} while (error != ErrorCode.NoError);
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if (error_list.Count != 1)
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{
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StringBuilder sb = new StringBuilder();
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foreach (ErrorCode e in error_list)
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{
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if (e != ErrorCode.NoError)
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{
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sb.Append(e.ToString());
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sb.Append(", ");
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}
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else
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break;
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}
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sb.Remove(sb.Length - 2, 2); // Remove the last comma
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throw new GraphicsErrorException(sb.ToString());
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}
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}
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}
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#endregion
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#region IDisposable Members
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public void Dispose()
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{
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CheckErrors();
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}
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#endregion
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}
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}
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