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/*

 * Mesa 3-D graphics library

 * Version:  3.5

 *

 * Copyright (C) 1999-2001  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.

 */

/*

 * New (3.1) transformation code written by Keith Whitwell.

 */

#include "main/glheader.h"

#include "main/imports.h"

#include "main/macros.h"

#include "m_vector.h"

/**

 * Given a vector [count][4] of floats, set all the [][elt] values

 * to 0 (if elt = 0, 1, 2) or 1.0 (if elt = 3).

 */

void

_mesa_vector4f_clean_elem( GLvector4f *vec, GLuint count, GLuint elt )

{

   static const GLubyte elem_bits[4] = {

      VEC_DIRTY_0,

      VEC_DIRTY_1,

      VEC_DIRTY_2,

      VEC_DIRTY_3

   };

   static const GLfloat clean[4] = { 0, 0, 0, 1 };

   const GLfloat v = clean[elt];

   GLfloat (*data)[4] = (GLfloat (*)[4])vec->start;

   GLuint i;

   for (i = 0; i < count; i++)

      data[i][elt] = v;

   vec->flags &= ~elem_bits[elt];

}

static const GLubyte size_bits[5] = {

   0,

   VEC_SIZE_1,

   VEC_SIZE_2,

   VEC_SIZE_3,

   VEC_SIZE_4,

};

/**

 * Initialize GLvector objects.

 * \param v  the vector object to initialize.

 * \param flags  bitwise-OR of VEC_* flags

 * \param storage  pointer to storage for the vector's data

 */

void

_mesa_vector4f_init( GLvector4f *v, GLbitfield flags, GLfloat (*storage)[4] )

{

   v->stride = 4 * sizeof(GLfloat);

   v->size = 2;   /* may change: 2-4 for vertices and 1-4 for texcoords */

   v->data = storage;

   v->start = (GLfloat *) storage;

   v->count = 0;

   v->flags = size_bits[4] | flags;

}

/**

 * Initialize GLvector objects and allocate storage.

 * \param v  the vector object

 * \param flags  bitwise-OR of VEC_* flags

 * \param count  number of elements to allocate in vector

 * \param alignment  desired memory alignment for the data (in bytes)

 */

void

_mesa_vector4f_alloc( GLvector4f *v, GLbitfield flags, GLuint count,

                      GLuint alignment )

{

   v->stride = 4 * sizeof(GLfloat);

   v->size = 2;

   v->storage = _mesa_align_malloc( count * 4 * sizeof(GLfloat), alignment );

   v->storage_count = count;

   v->start = (GLfloat *) v->storage;

   v->data = (GLfloat (*)[4]) v->storage;

   v->count = 0;

   v->flags = size_bits[4] | flags | VEC_MALLOC;

}

/**

 * Vector deallocation.  Free whatever memory is pointed to by the

 * vector's storage field if the VEC_MALLOC flag is set.

 * DO NOT free the GLvector object itself, though.

 */

void

_mesa_vector4f_free( GLvector4f *v )

{

   if (v->flags & VEC_MALLOC) {

      _mesa_align_free( v->storage );

      v->data = NULL;

      v->start = NULL;

      v->storage = NULL;

      v->flags &= ~VEC_MALLOC;

   }

}

/**

 * For debugging

 */

void

_mesa_vector4f_print( const GLvector4f *v, const GLubyte *cullmask,

                      GLboolean culling )

{

   static const GLfloat c[4] = { 0, 0, 0, 1 };

   static const char *templates[5] = {

      "%d:\t0, 0, 0, 1\n",

      "%d:\t%f, 0, 0, 1\n",

      "%d:\t%f, %f, 0, 1\n",

      "%d:\t%f, %f, %f, 1\n",

      "%d:\t%f, %f, %f, %f\n"

   };

   const char *t = templates[v->size];

   GLfloat *d = (GLfloat *)v->data;

   GLuint j, i = 0, count;

   printf("data-start\n");

   for (; d != v->start; STRIDE_F(d, v->stride), i++)

      printf(t, i, d[0], d[1], d[2], d[3]);

   printf("start-count(%u)\n", v->count);

   count = i + v->count;

   if (culling) {

      for (; i < count; STRIDE_F(d, v->stride), i++)

	 if (cullmask[i])

	    printf(t, i, d[0], d[1], d[2], d[3]);

   }

   else {

      for (; i < count; STRIDE_F(d, v->stride), i++)

	 printf(t, i, d[0], d[1], d[2], d[3]);

   }

   for (j = v->size; j < 4; j++) {

      if ((v->flags & (1<

	 printf("checking col %u is clean as advertised ", j);

	 for (i = 0, d = (GLfloat *) v->data;

	      i < count && d[j] == c[j];

	      i++, STRIDE_F(d, v->stride)) {

            /* no-op */

         }

	 if (i == count)

	    printf(" --> ok\n");

	 else

	    printf(" --> Failed at %u ******\n", i);

      }

   }

}