src/mesa/vbo/vbo_exec_eval.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keithw@vmware.com>
  26  */
  27
  28 #include "main/glheader.h"
  29 #include "main/context.h"
  30 #include "main/macros.h"
  31 #include "math/m_eval.h"
  32 #include "main/dispatch.h"
  33 #include "vbo_exec.h"
  34
  35
  36 static void clear_active_eval1( struct vbo_exec_context *exec, GLuint attr )
  37 {
  38    assert(attr < ARRAY_SIZE(exec->eval.map1));
  39    exec->eval.map1[attr].map = NULL;
  40 }
  41
  42 static void clear_active_eval2( struct vbo_exec_context *exec, GLuint attr )
  43 {
  44    assert(attr < ARRAY_SIZE(exec->eval.map2));
  45    exec->eval.map2[attr].map = NULL;
  46 }
  47
  48 static void set_active_eval1( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
  49                               struct gl_1d_map *map )
  50 {
  51    assert(attr < ARRAY_SIZE(exec->eval.map1));
  52    if (!exec->eval.map1[attr].map) {
  53       exec->eval.map1[attr].map = map;
  54       exec->eval.map1[attr].sz = dim;
  55    }
  56 }
  57
  58 static void set_active_eval2( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
  59                               struct gl_2d_map *map )
  60 {
  61    assert(attr < ARRAY_SIZE(exec->eval.map2));
  62    if (!exec->eval.map2[attr].map) {
  63       exec->eval.map2[attr].map = map;
  64       exec->eval.map2[attr].sz = dim;
  65    }
  66 }
  67
  68 void vbo_exec_eval_update( struct vbo_exec_context *exec )
  69 {
  70    struct gl_context *ctx = exec->ctx;
  71    GLuint attr;
  72
  73    /* Vertex program maps have priority over conventional attribs */
  74
  75    for (attr = 0; attr < VBO_ATTRIB_FIRST_MATERIAL; attr++) {
  76       clear_active_eval1( exec, attr );
  77       clear_active_eval2( exec, attr );
  78    }
  79
  80    if (ctx->Eval.Map1Color4)
  81       set_active_eval1( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map1Color4 );
  82
  83    if (ctx->Eval.Map2Color4)
  84       set_active_eval2( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map2Color4 );
  85
  86    if (ctx->Eval.Map1TextureCoord4)
  87       set_active_eval1( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map1Texture4 );
  88    else if (ctx->Eval.Map1TextureCoord3)
  89       set_active_eval1( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map1Texture3 );
  90    else if (ctx->Eval.Map1TextureCoord2)
  91       set_active_eval1( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map1Texture2 );
  92    else if (ctx->Eval.Map1TextureCoord1)
  93       set_active_eval1( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map1Texture1 );
  94
  95    if (ctx->Eval.Map2TextureCoord4)
  96       set_active_eval2( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map2Texture4 );
  97    else if (ctx->Eval.Map2TextureCoord3)
  98       set_active_eval2( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map2Texture3 );
  99    else if (ctx->Eval.Map2TextureCoord2)
 100       set_active_eval2( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map2Texture2 );
 101    else if (ctx->Eval.Map2TextureCoord1)
 102       set_active_eval2( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map2Texture1 );
 103
 104    if (ctx->Eval.Map1Normal)
 105       set_active_eval1( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal );
 106
 107    if (ctx->Eval.Map2Normal)
 108       set_active_eval2( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal );
 109
 110    if (ctx->Eval.Map1Vertex4)
 111       set_active_eval1( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 );
 112    else if (ctx->Eval.Map1Vertex3)
 113       set_active_eval1( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 );
 114
 115    if (ctx->Eval.Map2Vertex4)
 116       set_active_eval2( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 );
 117    else if (ctx->Eval.Map2Vertex3)
 118       set_active_eval2( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 );
 119
 120    exec->eval.recalculate_maps = GL_FALSE;
 121 }
 122
 123
 124
 125 void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u)
 126 {
 127    GLuint attr;
 128
 129    for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
 130       struct gl_1d_map *map = exec->eval.map1[attr].map;
 131       if (map) {
 132          GLfloat uu = (u - map->u1) * map->du;
 133          fi_type data[4];
 134
 135          ASSIGN_4V(data, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
 136                    FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
 137
 138          _math_horner_bezier_curve(map->Points, &data[0].f, uu,
 139                                    exec->eval.map1[attr].sz,
 140                                    map->Order);
 141
 142          COPY_SZ_4V( exec->vtx.attrptr[attr],
 143                      exec->vtx.attr[attr].size,
 144                      data );
 145       }
 146    }
 147
 148    /** Vertex -- EvalCoord1f is a noop if this map not enabled:
 149     **/
 150    if (exec->eval.map1[0].map) {
 151       struct gl_1d_map *map = exec->eval.map1[0].map;
 152       GLfloat uu = (u - map->u1) * map->du;
 153       GLfloat vertex[4];
 154
 155       ASSIGN_4V(vertex, 0, 0, 0, 1);
 156
 157       _math_horner_bezier_curve(map->Points, vertex, uu,
 158                                 exec->eval.map1[0].sz,
 159                                 map->Order);
 160
 161       if (exec->eval.map1[0].sz == 4)
 162          CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
 163       else
 164          CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
 165    }
 166 }
 167
 168
 169
 170 void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
 171                               GLfloat u, GLfloat v )
 172 {
 173    GLuint attr;
 174
 175    for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
 176       struct gl_2d_map *map = exec->eval.map2[attr].map;
 177       if (map) {
 178          GLfloat uu = (u - map->u1) * map->du;
 179          GLfloat vv = (v - map->v1) * map->dv;
 180          fi_type data[4];
 181
 182          ASSIGN_4V(data, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
 183                    FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
 184
 185          _math_horner_bezier_surf(map->Points,
 186                                   &data[0].f,
 187                                   uu, vv,
 188                                   exec->eval.map2[attr].sz,
 189                                   map->Uorder, map->Vorder);
 190
 191          COPY_SZ_4V( exec->vtx.attrptr[attr],
 192                      exec->vtx.attr[attr].size,
 193                      data );
 194       }
 195    }
 196
 197    /** Vertex -- EvalCoord2f is a noop if this map not enabled:
 198     **/
 199    if (exec->eval.map2[0].map) {
 200       struct gl_2d_map *map = exec->eval.map2[0].map;
 201       GLfloat uu = (u - map->u1) * map->du;
 202       GLfloat vv = (v - map->v1) * map->dv;
 203       GLfloat vertex[4];
 204
 205       ASSIGN_4V(vertex, 0, 0, 0, 1);
 206
 207       if (exec->ctx->Eval.AutoNormal) {
 208          fi_type normal[4];
 209          GLfloat du[4], dv[4];
 210
 211          _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
 212                                  exec->eval.map2[0].sz,
 213                                  map->Uorder, map->Vorder);
 214
 215          if (exec->eval.map2[0].sz == 4) {
 216             du[0] = du[0]*vertex[3] - du[3]*vertex[0];
 217             du[1] = du[1]*vertex[3] - du[3]*vertex[1];
 218             du[2] = du[2]*vertex[3] - du[3]*vertex[2];
 219
 220             dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
 221             dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
 222             dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
 223          }
 224
 225
 226          CROSS3(&normal[0].f, du, dv);
 227          NORMALIZE_3FV(&normal[0].f);
 228          normal[3] = FLOAT_AS_UNION(1.0);
 229
 230          COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
 231                      exec->vtx.attr[VBO_ATTRIB_NORMAL].size,
 232                      normal );
 233
 234       }
 235       else {
 236          _math_horner_bezier_surf(map->Points, vertex, uu, vv,
 237                                   exec->eval.map2[0].sz,
 238                                   map->Uorder, map->Vorder);
 239       }
 240
 241       if (exec->vtx.attr[VBO_ATTRIB_POS].size == 4)
 242          CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
 243       else
 244          CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
 245    }
 246 }
 247
 248