diff options
Diffstat (limited to 'mesalib/src/mesa/math/m_vector.c')
| -rw-r--r-- | mesalib/src/mesa/math/m_vector.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/mesalib/src/mesa/math/m_vector.c b/mesalib/src/mesa/math/m_vector.c new file mode 100644 index 000000000..4cbab11a3 --- /dev/null +++ b/mesalib/src/mesa/math/m_vector.c @@ -0,0 +1,185 @@ +/* + * 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 "main/imports.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 = 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) { + 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; + + _mesa_printf("data-start\n"); + for (; d != v->start; STRIDE_F(d, v->stride), i++) + _mesa_printf(t, i, d[0], d[1], d[2], d[3]); + + _mesa_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]) + _mesa_printf(t, i, d[0], d[1], d[2], d[3]); + } + else { + for (; i < count; STRIDE_F(d, v->stride), i++) + _mesa_printf(t, i, d[0], d[1], d[2], d[3]); + } + + for (j = v->size; j < 4; j++) { + if ((v->flags & (1<<j)) == 0) { + + _mesa_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) + _mesa_printf(" --> ok\n"); + else + _mesa_printf(" --> Failed at %u ******\n", i); + } + } +} |