1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: VertexArray interface

    15 *

    16 */

    17 

    18 #ifndef __M3G_VERTEXARRAY_H__

    19 #define __M3G_VERTEXARRAY_H__

    20 

    21 /*!

    22  * \internal

    23  * \file

    24  * \brief VertexArray interface

    25  */

    26 

    27 #include "m3g_object.h"

    28 #include "m3g_gl.h"

    29 

    30 /*!

    31  * \internal

    32  * \brief \c VertexArray object instance

    33  */

    34 struct M3GVertexArrayImpl

    35 {

    36     Object object;

    37     

    38     M3Gsizei vertexCount;

    39     M3Gint mapCount;

    40     M3Guint numLocks;

    41     

    42     GLint elementSize;

    43     GLenum elementType;

    44     GLsizei stride;

    45 

    46     M3GMemObject data;

    47     M3Gshort rangeMin, rangeMax;

    48 

    49     /*!

    50      * \internal

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

    52      */

    53     M3GMemObject cachedColors;

    54 

    55     /*!

    56      * \internal

    57      * \brief Alpha factor for currently stored scaled colors

    58      *

    59      * anything below zero is considered a dirty value

    60      */

    61     M3Gint cachedAlphaFactor;

    62     M3Gint timestamp;

    63 };

    64 

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

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

    67 

    68 /*----------------------------------------------------------------------

    69  * Internal functions

    70  *--------------------------------------------------------------------*/

    71 

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

    73 static void m3gLockNormalArray  (const VertexArray *array);

    74 static void m3gLockTexCoordArray(const VertexArray *array);

    75 static void m3gLockVertexArray  (const VertexArray *array);

    76 static void m3gUnlockArray      (const VertexArray *array);

    77 

    78 static M3Gbool m3gCreateAlphaColorCache(VertexArray *array);

    79     

    80 static VertexArray *m3gCloneVertexArray(const VertexArray *array);

    81 static M3Gint m3gGetArrayVertexCount (const VertexArray *array);

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

    83 static M3Gint m3gGetArrayTimestamp(const VertexArray *array);

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

    85 static M3Gbool m3gGetCoordinates(VertexArray *va,

    86                                  M3Gint elementCount,

    87                                  M3Gint idx,

    88                                  M3Gfloat *v);

    89 

    90 static void m3gGetArrayValueRange(const VertexArray *array,

    91                                   M3Gint *minValue, M3Gint *maxValue);

    92 

    93 #endif /*__M3G_VERTEXARRAY_H__*/