/*
 * Mesa 3-D graphics library
 * Version:  6.5.1
 *
 * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * This file implements the glArrayElement() function.
 * It involves looking at the format/type of all the enabled vertex arrays
 * and emitting a list of pointers to functions which set the per-vertex
 * state for the element/index.
 */


/* Author:
 *    Keith Whitwell <keith@tungstengraphics.com>
 */

#include <precomp.h>

typedef void (GLAPIENTRY *array_func)( const void * );

typedef struct {
   const struct gl_client_array *array;
   int offset;
} AEarray;

typedef void (GLAPIENTRY *attrib_func)( GLuint indx, const void *data );

typedef struct {
   const struct gl_client_array *array;
   attrib_func func;
   GLuint index;
} AEattrib;

typedef struct {
   AEarray arrays[32];
   AEattrib attribs[VERT_ATTRIB_MAX + 1];
   GLuint NewState;

   struct gl_buffer_object *vbo[VERT_ATTRIB_MAX];
   GLuint nr_vbos;
   GLboolean mapped_vbos;

} AEcontext;

#define AE_CONTEXT(ctx) ((AEcontext *)(ctx)->aelt_context)


/*
 * Convert GL_BYTE, GL_UNSIGNED_BYTE, .. GL_DOUBLE into an integer
 * in the range [0, 7].  Luckily these type tokens are sequentially
 * numbered in gl.h, except for GL_DOUBLE.
 */
#define TYPE_IDX(t) ( (t) == GL_DOUBLE ? 7 : (t) & 7 )

#define NUM_TYPES 8


#if FEATURE_arrayelt


static const int ColorFuncs[2][NUM_TYPES] = {
   {
      _gloffset_Color3bv,
      _gloffset_Color3ubv,
      _gloffset_Color3sv,
      _gloffset_Color3usv,
      _gloffset_Color3iv,
      _gloffset_Color3uiv,
      _gloffset_Color3fv,
      _gloffset_Color3dv,
   },
   {
      _gloffset_Color4bv,
      _gloffset_Color4ubv,
      _gloffset_Color4sv,
      _gloffset_Color4usv,
      _gloffset_Color4iv,
      _gloffset_Color4uiv,
      _gloffset_Color4fv,
      _gloffset_Color4dv,
   },
};

static const int VertexFuncs[3][NUM_TYPES] = {
   {
      -1,
      -1,
      _gloffset_Vertex2sv,
      -1,
      _gloffset_Vertex2iv,
      -1,
      _gloffset_Vertex2fv,
      _gloffset_Vertex2dv,
   },
   {
      -1,
      -1,
      _gloffset_Vertex3sv,
      -1,
      _gloffset_Vertex3iv,
      -1,
      _gloffset_Vertex3fv,
      _gloffset_Vertex3dv,
   },
   {
      -1,
      -1,
      _gloffset_Vertex4sv,
      -1,
      _gloffset_Vertex4iv,
      -1,
      _gloffset_Vertex4fv,
      _gloffset_Vertex4dv,
   },
};

static const int IndexFuncs[NUM_TYPES] = {
   -1,
   _gloffset_Indexubv,
   _gloffset_Indexsv,
   -1,
   _gloffset_Indexiv,
   -1,
   _gloffset_Indexfv,
   _gloffset_Indexdv,
};

static const int NormalFuncs[NUM_TYPES] = {
   _gloffset_Normal3bv,
   -1,
   _gloffset_Normal3sv,
   -1,
   _gloffset_Normal3iv,
   -1,
   _gloffset_Normal3fv,
   _gloffset_Normal3dv,
};

/* Note: _gloffset_* for these may not be a compile-time constant. */
static int FogCoordFuncs[NUM_TYPES];


/**
 ** GL_NV_vertex_program
 **/

/* GL_BYTE attributes */

static void GLAPIENTRY
VertexAttrib1NbvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, BYTE_TO_FLOAT(v[0])));
}

static void GLAPIENTRY
VertexAttrib1bvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, (GLfloat)v[0]));
}

static void GLAPIENTRY
VertexAttrib2NbvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, BYTE_TO_FLOAT(v[0]), BYTE_TO_FLOAT(v[1])));
}

static void GLAPIENTRY
VertexAttrib2bvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1]));
}

static void GLAPIENTRY
VertexAttrib3NbvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, BYTE_TO_FLOAT(v[0]),
					       BYTE_TO_FLOAT(v[1]),
					       BYTE_TO_FLOAT(v[2])));
}

static void GLAPIENTRY
VertexAttrib3bvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1], (GLfloat)v[2]));
}

static void GLAPIENTRY
VertexAttrib4NbvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, BYTE_TO_FLOAT(v[0]),
					       BYTE_TO_FLOAT(v[1]),
					       BYTE_TO_FLOAT(v[2]),
					       BYTE_TO_FLOAT(v[3])));
}

static void GLAPIENTRY
VertexAttrib4bvNV(GLuint index, const GLbyte *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1], (GLfloat)v[2], (GLfloat)v[3]));
}

/* GL_UNSIGNED_BYTE attributes */

static void GLAPIENTRY
VertexAttrib1NubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, UBYTE_TO_FLOAT(v[0])));
}

static void GLAPIENTRY
VertexAttrib1ubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, (GLfloat)v[0]));
}

static void GLAPIENTRY
VertexAttrib2NubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, UBYTE_TO_FLOAT(v[0]),
                                          UBYTE_TO_FLOAT(v[1])));
}

static void GLAPIENTRY
VertexAttrib2ubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1]));
}

static void GLAPIENTRY
VertexAttrib3NubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, UBYTE_TO_FLOAT(v[0]),
					       UBYTE_TO_FLOAT(v[1]),
					       UBYTE_TO_FLOAT(v[2])));
}
static void GLAPIENTRY
VertexAttrib3ubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, (GLfloat)v[0],
                                          (GLfloat)v[1], (GLfloat)v[2]));
}

static void GLAPIENTRY
VertexAttrib4NubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, UBYTE_TO_FLOAT(v[0]),
                                          UBYTE_TO_FLOAT(v[1]),
                                          UBYTE_TO_FLOAT(v[2]),
                                          UBYTE_TO_FLOAT(v[3])));
}

static void GLAPIENTRY
VertexAttrib4ubvNV(GLuint index, const GLubyte *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, (GLfloat)v[0],
                                          (GLfloat)v[1], (GLfloat)v[2],
                                          (GLfloat)v[3]));
}

/* GL_SHORT attributes */

static void GLAPIENTRY
VertexAttrib1NsvNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, SHORT_TO_FLOAT(v[0])));
}

static void GLAPIENTRY
VertexAttrib1svNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, (GLfloat)v[0]));
}

static void GLAPIENTRY
VertexAttrib2NsvNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, SHORT_TO_FLOAT(v[0]),
                                          SHORT_TO_FLOAT(v[1])));
}

static void GLAPIENTRY
VertexAttrib2svNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1]));
}

static void GLAPIENTRY
VertexAttrib3NsvNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, SHORT_TO_FLOAT(v[0]),
			     SHORT_TO_FLOAT(v[1]),
			     SHORT_TO_FLOAT(v[2])));
}

static void GLAPIENTRY
VertexAttrib3svNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2]));
}

static void GLAPIENTRY
VertexAttrib4NsvNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, SHORT_TO_FLOAT(v[0]),
			     SHORT_TO_FLOAT(v[1]),
			     SHORT_TO_FLOAT(v[2]),
			     SHORT_TO_FLOAT(v[3])));
}

static void GLAPIENTRY
VertexAttrib4svNV(GLuint index, const GLshort *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2], (GLfloat)v[3]));
}

/* GL_UNSIGNED_SHORT attributes */

static void GLAPIENTRY
VertexAttrib1NusvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, USHORT_TO_FLOAT(v[0])));
}

static void GLAPIENTRY
VertexAttrib1usvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, (GLfloat)v[0]));
}

static void GLAPIENTRY
VertexAttrib2NusvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, USHORT_TO_FLOAT(v[0]),
			     USHORT_TO_FLOAT(v[1])));
}

static void GLAPIENTRY
VertexAttrib2usvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, (GLfloat)v[0],
                                          (GLfloat)v[1]));
}

static void GLAPIENTRY
VertexAttrib3NusvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, USHORT_TO_FLOAT(v[0]),
					       USHORT_TO_FLOAT(v[1]),
					       USHORT_TO_FLOAT(v[2])));
}

static void GLAPIENTRY
VertexAttrib3usvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2]));
}

static void GLAPIENTRY
VertexAttrib4NusvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, USHORT_TO_FLOAT(v[0]),
					       USHORT_TO_FLOAT(v[1]),
					       USHORT_TO_FLOAT(v[2]),
					       USHORT_TO_FLOAT(v[3])));
}

static void GLAPIENTRY
VertexAttrib4usvNV(GLuint index, const GLushort *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2], (GLfloat)v[3]));
}

/* GL_INT attributes */

static void GLAPIENTRY
VertexAttrib1NivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, INT_TO_FLOAT(v[0])));
}

static void GLAPIENTRY
VertexAttrib1ivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, (GLfloat)v[0]));
}

static void GLAPIENTRY
VertexAttrib2NivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, INT_TO_FLOAT(v[0]),
					       INT_TO_FLOAT(v[1])));
}

static void GLAPIENTRY
VertexAttrib2ivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1]));
}

static void GLAPIENTRY
VertexAttrib3NivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, INT_TO_FLOAT(v[0]),
					       INT_TO_FLOAT(v[1]),
					       INT_TO_FLOAT(v[2])));
}

static void GLAPIENTRY
VertexAttrib3ivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2]));
}

static void GLAPIENTRY
VertexAttrib4NivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, INT_TO_FLOAT(v[0]),
                                          INT_TO_FLOAT(v[1]),
                                          INT_TO_FLOAT(v[2]),
                                          INT_TO_FLOAT(v[3])));
}

static void GLAPIENTRY
VertexAttrib4ivNV(GLuint index, const GLint *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2], (GLfloat)v[3]));
}

/* GL_UNSIGNED_INT attributes */

static void GLAPIENTRY
VertexAttrib1NuivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, UINT_TO_FLOAT(v[0])));
}

static void GLAPIENTRY
VertexAttrib1uivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib1fNV(GET_DISPATCH(), (index, (GLfloat)v[0]));
}

static void GLAPIENTRY
VertexAttrib2NuivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, UINT_TO_FLOAT(v[0]),
                                          UINT_TO_FLOAT(v[1])));
}

static void GLAPIENTRY
VertexAttrib2uivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib2fNV(GET_DISPATCH(), (index, (GLfloat)v[0],
                                          (GLfloat)v[1]));
}

static void GLAPIENTRY
VertexAttrib3NuivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, UINT_TO_FLOAT(v[0]),
					       UINT_TO_FLOAT(v[1]),
					       UINT_TO_FLOAT(v[2])));
}

static void GLAPIENTRY
VertexAttrib3uivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib3fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2]));
}

static void GLAPIENTRY
VertexAttrib4NuivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, UINT_TO_FLOAT(v[0]),
					       UINT_TO_FLOAT(v[1]),
					       UINT_TO_FLOAT(v[2]),
					       UINT_TO_FLOAT(v[3])));
}

static void GLAPIENTRY
VertexAttrib4uivNV(GLuint index, const GLuint *v)
{
   CALL_VertexAttrib4fNV(GET_DISPATCH(), (index, (GLfloat)v[0], (GLfloat)v[1],
                                          (GLfloat)v[2], (GLfloat)v[3]));
}

/* GL_FLOAT attributes */

static void GLAPIENTRY
VertexAttrib1fvNV(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib1fvNV(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY
VertexAttrib2fvNV(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib2fvNV(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY
VertexAttrib3fvNV(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib3fvNV(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY
VertexAttrib4fvNV(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib4fvNV(GET_DISPATCH(), (index, v));
}

/* GL_DOUBLE attributes */

static void GLAPIENTRY
VertexAttrib1dvNV(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib1dvNV(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY
VertexAttrib2dvNV(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib2dvNV(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY
VertexAttrib3dvNV(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib3dvNV(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY
VertexAttrib4dvNV(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib4dvNV(GET_DISPATCH(), (index, v));
}


/*
 * Array [size][type] of VertexAttrib functions
 */
static attrib_func AttribFuncsNV[2][4][NUM_TYPES] = {
   {
      /* non-normalized */
      {
         /* size 1 */
         (attrib_func) VertexAttrib1bvNV,
         (attrib_func) VertexAttrib1ubvNV,
         (attrib_func) VertexAttrib1svNV,
         (attrib_func) VertexAttrib1usvNV,
         (attrib_func) VertexAttrib1ivNV,
         (attrib_func) VertexAttrib1uivNV,
         (attrib_func) VertexAttrib1fvNV,
         (attrib_func) VertexAttrib1dvNV
      },
      {
         /* size 2 */
         (attrib_func) VertexAttrib2bvNV,
         (attrib_func) VertexAttrib2ubvNV,
         (attrib_func) VertexAttrib2svNV,
         (attrib_func) VertexAttrib2usvNV,
         (attrib_func) VertexAttrib2ivNV,
         (attrib_func) VertexAttrib2uivNV,
         (attrib_func) VertexAttrib2fvNV,
         (attrib_func) VertexAttrib2dvNV
      },
      {
         /* size 3 */
         (attrib_func) VertexAttrib3bvNV,
         (attrib_func) VertexAttrib3ubvNV,
         (attrib_func) VertexAttrib3svNV,
         (attrib_func) VertexAttrib3usvNV,
         (attrib_func) VertexAttrib3ivNV,
         (attrib_func) VertexAttrib3uivNV,
         (attrib_func) VertexAttrib3fvNV,
         (attrib_func) VertexAttrib3dvNV
      },
      {
         /* size 4 */
         (attrib_func) VertexAttrib4bvNV,
         (attrib_func) VertexAttrib4ubvNV,
         (attrib_func) VertexAttrib4svNV,
         (attrib_func) VertexAttrib4usvNV,
         (attrib_func) VertexAttrib4ivNV,
         (attrib_func) VertexAttrib4uivNV,
         (attrib_func) VertexAttrib4fvNV,
         (attrib_func) VertexAttrib4dvNV
      }
   },
   {
      /* normalized (except for float/double) */
      {
         /* size 1 */
         (attrib_func) VertexAttrib1NbvNV,
         (attrib_func) VertexAttrib1NubvNV,
         (attrib_func) VertexAttrib1NsvNV,
         (attrib_func) VertexAttrib1NusvNV,
         (attrib_func) VertexAttrib1NivNV,
         (attrib_func) VertexAttrib1NuivNV,
         (attrib_func) VertexAttrib1fvNV,
         (attrib_func) VertexAttrib1dvNV
      },
      {
         /* size 2 */
         (attrib_func) VertexAttrib2NbvNV,
         (attrib_func) VertexAttrib2NubvNV,
         (attrib_func) VertexAttrib2NsvNV,
         (attrib_func) VertexAttrib2NusvNV,
         (attrib_func) VertexAttrib2NivNV,
         (attrib_func) VertexAttrib2NuivNV,
         (attrib_func) VertexAttrib2fvNV,
         (attrib_func) VertexAttrib2dvNV
      },
      {
         /* size 3 */
         (attrib_func) VertexAttrib3NbvNV,
         (attrib_func) VertexAttrib3NubvNV,
         (attrib_func) VertexAttrib3NsvNV,
         (attrib_func) VertexAttrib3NusvNV,
         (attrib_func) VertexAttrib3NivNV,
         (attrib_func) VertexAttrib3NuivNV,
         (attrib_func) VertexAttrib3fvNV,
         (attrib_func) VertexAttrib3dvNV
      },
      {
         /* size 4 */
         (attrib_func) VertexAttrib4NbvNV,
         (attrib_func) VertexAttrib4NubvNV,
         (attrib_func) VertexAttrib4NsvNV,
         (attrib_func) VertexAttrib4NusvNV,
         (attrib_func) VertexAttrib4NivNV,
         (attrib_func) VertexAttrib4NuivNV,
         (attrib_func) VertexAttrib4fvNV,
         (attrib_func) VertexAttrib4dvNV
      }
   }
};

/**********************************************************************/


GLboolean _ae_create_context( struct gl_context *ctx )
{
   if (ctx->aelt_context)
      return GL_TRUE;

   FogCoordFuncs[0] = -1;
   FogCoordFuncs[1] = -1;
   FogCoordFuncs[2] = -1;
   FogCoordFuncs[3] = -1;
   FogCoordFuncs[4] = -1;
   FogCoordFuncs[5] = -1;
   FogCoordFuncs[6] = _gloffset_FogCoordfvEXT;
   FogCoordFuncs[7] = _gloffset_FogCoorddvEXT;

   ctx->aelt_context = CALLOC( sizeof(AEcontext) );
   if (!ctx->aelt_context)
      return GL_FALSE;

   AE_CONTEXT(ctx)->NewState = ~0;
   return GL_TRUE;
}


void _ae_destroy_context( struct gl_context *ctx )
{
   if ( AE_CONTEXT( ctx ) ) {
      FREE( ctx->aelt_context );
      ctx->aelt_context = NULL;
   }
}

static void check_vbo( AEcontext *actx,
		       struct gl_buffer_object *vbo )
{
   if (_mesa_is_bufferobj(vbo) && !_mesa_bufferobj_mapped(vbo)) {
      GLuint i;
      for (i = 0; i < actx->nr_vbos; i++)
	 if (actx->vbo[i] == vbo)
	    return;
      assert(actx->nr_vbos < VERT_ATTRIB_MAX);
      actx->vbo[actx->nr_vbos++] = vbo;
   }
}


/**
 * Make a list of per-vertex functions to call for each glArrayElement call.
 * These functions access the array data (i.e. glVertex, glColor, glNormal,
 * etc).
 * Note: this may be called during display list construction.
 */
static void _ae_update_state( struct gl_context *ctx )
{
   AEcontext *actx = AE_CONTEXT(ctx);
   AEarray *aa = actx->arrays;
   AEattrib *at = actx->attribs;

   actx->nr_vbos = 0;

   /* conventional vertex arrays */
   if (ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) {
      aa->array = &ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR_INDEX];
      aa->offset = IndexFuncs[TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) {
      aa->array = &ctx->Array.VertexAttrib[VERT_ATTRIB_EDGEFLAG];
      aa->offset = _gloffset_EdgeFlagv;
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) {
      aa->array = &ctx->Array.VertexAttrib[VERT_ATTRIB_NORMAL];
      aa->offset = NormalFuncs[TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR].Enabled) {
      aa->array = &ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR];
      aa->offset = ColorFuncs[aa->array->Size-3][TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.VertexAttrib[VERT_ATTRIB_FOG].Enabled) {
      aa->array = &ctx->Array.VertexAttrib[VERT_ATTRIB_FOG];
      aa->offset = FogCoordFuncs[TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   {
      struct gl_client_array *attribArray = &ctx->Array.VertexAttrib[VERT_ATTRIB_TEX];
      if (attribArray->Enabled) {
         /* NOTE: we use generic glVertexAttribNV functions here.
          * If we ever remove GL_NV_vertex_program this will have to change.
          */
         at->array = attribArray;
         ASSERT(!at->array->Normalized);
         at->func = AttribFuncsNV[at->array->Normalized]
                                 [at->array->Size-1]
                                 [TYPE_IDX(at->array->Type)];
         at->index = VERT_ATTRIB_TEX;
         check_vbo(actx, at->array->BufferObj);
         at++;
      }
   }

   /* finally, vertex position */
   if (ctx->Array.VertexAttrib[VERT_ATTRIB_POS].Enabled) {
      aa->array = &ctx->Array.VertexAttrib[VERT_ATTRIB_POS];
      aa->offset = VertexFuncs[aa->array->Size-2][TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }

   check_vbo(actx, ctx->Array.ElementArrayBufferObj);

   ASSERT(at - actx->attribs <= VERT_ATTRIB_MAX);
   ASSERT(aa - actx->arrays < 32);
   at->func = NULL;  /* terminate the list */
   aa->offset = -1;  /* terminate the list */

   actx->NewState = 0;
}

void _ae_map_vbos( struct gl_context *ctx )
{
   AEcontext *actx = AE_CONTEXT(ctx);
   GLuint i;
   
   if (actx->mapped_vbos)
      return;

   if (actx->NewState)
      _ae_update_state(ctx);

   for (i = 0; i < actx->nr_vbos; i++)
      ctx->Driver.MapBufferRange(ctx, 0,
				 actx->vbo[i]->Size,
				 GL_MAP_READ_BIT,
				 actx->vbo[i]);

   if (actx->nr_vbos)
      actx->mapped_vbos = GL_TRUE;
}

void _ae_unmap_vbos( struct gl_context *ctx )
{
   AEcontext *actx = AE_CONTEXT(ctx);
   GLuint i;

   if (!actx->mapped_vbos)
      return;

   assert (!actx->NewState);

   for (i = 0; i < actx->nr_vbos; i++)
      ctx->Driver.UnmapBuffer(ctx, actx->vbo[i]);

   actx->mapped_vbos = GL_FALSE;
}


/**
 * Called via glArrayElement() and glDrawArrays().
 * Issue the glNormal, glVertex, glColor, glVertexAttrib, etc functions
 * for all enabled vertex arrays (for elt-th element).
 * Note: this may be called during display list construction.
 */
void GLAPIENTRY _ae_ArrayElement( GLint elt )
{
   GET_CURRENT_CONTEXT(ctx);
   const AEcontext *actx = AE_CONTEXT(ctx);
   const AEarray *aa;
   const AEattrib *at;
   const struct _glapi_table * const disp = GET_DISPATCH();
   GLboolean do_map;

   if (actx->NewState) {
      assert(!actx->mapped_vbos);
      _ae_update_state( ctx );
   }

   /* Determine if we need to map/unmap VBOs */
   do_map = actx->nr_vbos && !actx->mapped_vbos;

   if (do_map)
      _ae_map_vbos(ctx);
   
   /* emit generic attribute elements */
   for (at = actx->attribs; at->func; at++) {
      const GLubyte *src
         = ADD_POINTERS(at->array->BufferObj->Pointer, at->array->Ptr)
         + elt * at->array->StrideB;
      at->func( at->index, src );
   }

   /* emit conventional arrays elements */
   for (aa = actx->arrays; aa->offset != -1 ; aa++) {
      const GLubyte *src
         = ADD_POINTERS(aa->array->BufferObj->Pointer, aa->array->Ptr)
         + elt * aa->array->StrideB;
      CALL_by_offset( disp, (array_func), aa->offset, 
		      ((const void *) src) );
   }

   if (do_map)
      _ae_unmap_vbos(ctx);
}


void _ae_invalidate_state( struct gl_context *ctx, GLuint new_state )
{
   AEcontext *actx = AE_CONTEXT(ctx);

   
   /* Only interested in this subset of mesa state.  Need to prune
    * this down as both tnl/ and the drivers can raise statechanges
    * for arcane reasons in the middle of seemingly atomic operations
    * like DrawElements, over which we'd like to keep a known set of
    * arrays and vbo's mapped.  
    *
    * Luckily, neither the drivers nor tnl muck with the state that
    * concerns us here:
    */
   new_state &= _NEW_ARRAY;
   if (new_state) {
      assert(!actx->mapped_vbos);
      actx->NewState |= new_state;
   }
}


void _mesa_install_arrayelt_vtxfmt(struct _glapi_table *disp,
                                   const GLvertexformat *vfmt)
{
   SET_ArrayElement(disp, vfmt->ArrayElement);
}


#endif /* FEATURE_arrayelt */