////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Graphics/GLCheck.hpp>
#include <SFML/System/Err.hpp>
#include <string>


namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
void glCheckError(const char* file, unsigned int line, const char* expression)
{
    // Get the last error
    GLenum errorCode = glGetError();

    if (errorCode != GL_NO_ERROR)
    {
        std::string fileString = file;
        std::string error = "Unknown error";
        std::string description  = "No description";

        // Decode the error code
        switch (errorCode)
        {
            case GL_INVALID_ENUM:
            {
                error = "GL_INVALID_ENUM";
                description = "An unacceptable value has been specified for an enumerated argument.";
                break;
            }

            case GL_INVALID_VALUE:
            {
                error = "GL_INVALID_VALUE";
                description = "A numeric argument is out of range.";
                break;
            }

            case GL_INVALID_OPERATION:
            {
                error = "GL_INVALID_OPERATION";
                description = "The specified operation is not allowed in the current state.";
                break;
            }

            case GL_STACK_OVERFLOW:
            {
                error = "GL_STACK_OVERFLOW";
                description = "This command would cause a stack overflow.";
                break;
            }

            case GL_STACK_UNDERFLOW:
            {
                error = "GL_STACK_UNDERFLOW";
                description = "This command would cause a stack underflow.";
                break;
            }

            case GL_OUT_OF_MEMORY:
            {
                error = "GL_OUT_OF_MEMORY";
                description = "There is not enough memory left to execute the command.";
                break;
            }

            case GLEXT_GL_INVALID_FRAMEBUFFER_OPERATION:
            {
                error = "GL_INVALID_FRAMEBUFFER_OPERATION";
                description = "The object bound to FRAMEBUFFER_BINDING is not \"framebuffer complete\".";
                break;
            }
        }

        // Log the error
        err() << "An internal OpenGL call failed in "
              << fileString.substr(fileString.find_last_of("\\/") + 1) << "(" << line << ")."
              << "\nExpression:\n   " << expression
              << "\nError description:\n   " << error << "\n   " << description << "\n"
              << std::endl;
    }
}


} // namespace priv

} // namespace sf
