/*

* 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: VertexArray interface

*

*/

#ifndef __M3G_VERTEXARRAY_H__

#define __M3G_VERTEXARRAY_H__

/*!

 * \internal

 * \file

 * \brief VertexArray interface

 */

#include "m3g_object.h"

#include "m3g_gl.h"

/*!

 * \internal

 * \brief \c VertexArray object instance

 */

struct M3GVertexArrayImpl

{

    Object object;

    M3Gsizei vertexCount;

    M3Gint mapCount;

    M3Guint numLocks;

    GLint elementSize;

    GLenum elementType;

    GLsizei stride;

    M3GMemObject data;

    M3Gshort rangeMin, rangeMax;

    /*!

     * \internal

     * \brief Cached color array(s?) with premultiplied alpha

     */

    M3GMemObject cachedColors;

    /*!

     * \internal

     * \brief Alpha factor for currently stored scaled colors

     *

     * anything below zero is considered a dirty value

     */

    M3Gint cachedAlphaFactor;

    M3Gint timestamp;

};

/* If this assert fails, check the compiler padding settings */

M3G_CT_ASSERT(sizeof(VertexArray) == sizeof(Object) + 44);

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

 * Internal functions

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

static void m3gLockColorArray   (const VertexArray *array, M3Gint alphaFactor);

static void m3gLockNormalArray  (const VertexArray *array);

static void m3gLockTexCoordArray(const VertexArray *array);

static void m3gLockVertexArray  (const VertexArray *array);

static void m3gUnlockArray      (const VertexArray *array);

static M3Gbool m3gCreateAlphaColorCache(VertexArray *array);

static VertexArray *m3gCloneVertexArray(const VertexArray *array);

static M3Gint m3gGetArrayVertexCount (const VertexArray *array);

static M3Gbool m3gIsCompatible  (const VertexArray *array, const VertexArray *other);

static M3Gint m3gGetArrayTimestamp(const VertexArray *array);

static void m3gGetArrayBoundingBox(const VertexArray *array, M3Gshort *boundingBox);

static M3Gbool m3gGetCoordinates(VertexArray *va,

                                 M3Gint elementCount,

                                 M3Gint idx,

                                 M3Gfloat *v);

static void m3gGetArrayValueRange(const VertexArray *array,

                                  M3Gint *minValue, M3Gint *maxValue);

#endif /*__M3G_VERTEXARRAY_H__*/