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/*
* Mesa 3-D graphics library
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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 <stdio.h>
#include <stddef.h>
#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] )
{
STATIC_ASSERT(V4F_DATA == offsetof(GLvector4f, data));
STATIC_ASSERT(V4F_START == offsetof(GLvector4f, start));
STATIC_ASSERT(V4F_COUNT == offsetof(GLvector4f, count));
STATIC_ASSERT(V4F_STRIDE == offsetof(GLvector4f, stride));
STATIC_ASSERT(V4F_SIZE == offsetof(GLvector4f, size));
STATIC_ASSERT(V4F_FLAGS == offsetof(GLvector4f, flags));
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<<j)) == 0) {
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);
}
}
}
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