/*

* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: OpenGL utility functions and definitions

*

*/

#ifndef __M3G_GL_H__

#define __M3G_GL_H__

/*!

 * \internal

 * \file

 * \brief OpenGL utility functions and definitions

 */

#include "M3G/m3g_core.h"

#include "m3g_defs.h"

#if !(defined(M3G_NGL_CONTEXT_API) || defined(M3G_NGL_TEXTURE_API))

#   include <GLES/gl.h>

#else

/*@notfunction@*/

#   define NGL_PREFIX(func)     gl ## func

/*@notfunction@*/

#   define NGLI_PREFIX(func)    ngl ## func

/*@notfunction@*/

#   define NGLU_PREFIX(func)    nglu ## func

#   include "ngl.h"

#endif

#if defined(__cplusplus)

extern "C" {

#endif

/*----------------------------------------------------------------------

 * Handy macros

 *--------------------------------------------------------------------*/

#if defined(M3G_DEBUG_ASSERTS)

    static M3G_INLINE void m3gAssertGL(const char *filename, int line)

    {

        GLint err = glGetError();

        if (err != GL_NO_ERROR) {

            M3G_LOG3(M3G_LOG_FATAL_ERRORS, "GL error 0x%X (%s: %d)\n",

                     err, filename, line);

            M3G_ASSERT(M3G_FALSE);

        }

    }

#   define M3G_ASSERT_GL m3gAssertGL(__FILE__, __LINE__)

#else

#   define M3G_ASSERT_GL

#endif

#define M3G_GLTYPE(m3gType) ((m3gType) + 0x1400)

#define M3G_M3GTYPE(glType) ((glType) - 0x1400)

/*----------------------------------------------------------------------

 * Internal functions

 *--------------------------------------------------------------------*/

static GLenum m3gGetGLFormat(M3GPixelFormat format);    /* m3g_image.inl */

static void m3gGLColor(M3Guint argb, GLfixed *dst);     /* m3g_image.c */

#if !defined(M3G_NGL_CONTEXT_API)

static void m3gInitializeEGL(void);     /* m3g_rendercontext.inl */

static void m3gTerminateEGL(void);      /* m3g_rendercontext.inl */

#endif

/*----------------------------------------------------------------------

 * Native platform abstraction layer

 *--------------------------------------------------------------------*/

#if !defined(M3G_NGL_CONTEXT_API)

M3Gbool m3gglLockNativeBitmap(M3GNativeBitmap bitmap,

                              M3Gubyte **ptr,

                              M3Gsizei *stride);

void    m3gglReleaseNativeBitmap(M3GNativeBitmap bitmap);

M3Gbool m3gglGetNativeBitmapParams(M3GNativeBitmap bitmap,

                                   M3GPixelFormat *format,

M3Gbool m3gglGetNativeWindowParams(M3GNativeWindow wnd,

                                   M3GPixelFormat *format,

                                   M3Gint *width, M3Gint *height);

#endif /* M3G_NGL_CONTEXT_API */

#if defined(__cplusplus)

} /* extern "C" */

#endif

#endif /*__M3G_GL_H__*/