love-openzdk / src / modules / graphics / opengl2 / GLUtilities.h

/**
* Copyright (c) 2006-2010 LOVE Development Team
* 
* 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.
**/

#ifndef LOVE_GRAPHICS_OPENGL2_GL_UTILITIES_H
#define LOVE_GRAPHICS_OPENGL2_GL_UTILITIES_H

// C++
#include <cassert>
#include <cstdio>

// LOVE
#include <common/Exception.h>

// OpenGL
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>

namespace love
{
namespace graphics
{
namespace opengl2
{
	inline char * LGLErrorMessage(GLenum error)
	{
		switch (glGetError())
		{
		case GL_INVALID_ENUM:
			return "Invalid enumerant value (GL_INVALID_ENUM)";
		case GL_INVALID_VALUE:
			return "Invalid argument (GL_INVALID_VALUE)";
		case GL_INVALID_OPERATION:
			return "Invalid operation (GL_INVALID_OPERATION)";
		case GL_INVALID_FRAMEBUFFER_OPERATION:
			return "Invalid framebuffer operation (GL_INVALID_FRAMEBUFFER_OPERATION)";
		case GL_OUT_OF_MEMORY:
			return "Out of memory (GL_OUT_OF_MEMORY)";
		default:
			return "Unknown error";
		case GL_NO_ERROR:
			return NULL;
		}
	}

	inline void LGLErrorResetR()
	{
		while (glGetError());
	}

	inline void LGLErrorResetD()
	{
	#ifndef NDEBUG
		LGLErrorResetR();
	#endif
	}

	inline bool LGLErrorTestR()
	{
		return glGetError() != GL_NO_ERROR;
	}

	inline bool LGLErrorTestD()
	{
	#ifndef NDEBUG
		GLenum error = glGetError();
		if (error != GL_NO_ERROR)
		{
			std::fprintf(stderr, "OPENGL ERROR: %s\n", LGLErrorMessage(error));
			assert(0);
			return true;
		}
	#else
		return false;
	#endif
	}

	inline void LGLErrorCheckR()
	{
		GLenum error = glGetError();
		if (error != GL_NO_ERROR)
			throw love::Exception(LGLErrorMessage(error));
	}

	inline void LGLErrorCheckD()
	{
	#ifndef NDEBUG
		LGLErrorTestD();
	#endif
	}

} // opengl2
} // graphics
} // love

#endif // LOVE_GRAPHICS_OPENGL2_GL_UTILITIES_H
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