src/mesa/vbo/vbo_exec_eval.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.1
   4  *
   5  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28 #include "glheader.h"
  29 #include "api_eval.h"
  30 #include "context.h"
  31 #include "macros.h"
  32 #include "math/m_eval.h"
  33 #include "vbo_exec.h"
  34 #include "dispatch.h"
  35
  36
  37 static void clear_active_eval1( struct vbo_exec_context *exec, GLuint attr )
  38 {
  39    exec->eval.map1[attr].map = NULL;
  40 }
  41
  42 static void clear_active_eval2( struct vbo_exec_context *exec, GLuint attr )
  43 {
  44    exec->eval.map2[attr].map = NULL;
  45 }
  46
  47 static void set_active_eval1( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
  48                               struct gl_1d_map *map )
  49 {
  50    if (!exec->eval.map1[attr].map) {
  51       exec->eval.map1[attr].map = map;
  52       exec->eval.map1[attr].sz = dim;
  53    }
  54 }
  55
  56 static void set_active_eval2( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
  57                               struct gl_2d_map *map )
  58 {
  59    if (!exec->eval.map2[attr].map) {
  60       exec->eval.map2[attr].map = map;
  61       exec->eval.map2[attr].sz = dim;
  62    }
  63 }
  64
  65 void vbo_exec_eval_update( struct vbo_exec_context *exec )
  66 {
  67    GLcontext *ctx = exec->ctx;
  68    GLuint attr;
  69
  70    /* Vertex program maps have priority over conventional attribs */
  71
  72    for (attr = 0; attr < VBO_ATTRIB_FIRST_MATERIAL; attr++) {
  73       clear_active_eval1( exec, attr );
  74       clear_active_eval2( exec, attr );
  75    }
  76
  77    /* _NEW_PROGRAM */
  78    if (ctx->VertexProgram._Enabled) {
  79       for (attr = 0; attr < VBO_ATTRIB_FIRST_MATERIAL; attr++) {
  80          /* _NEW_EVAL */
  81          if (ctx->Eval.Map1Attrib[attr])
  82             set_active_eval1( exec, attr, 4, &ctx->EvalMap.Map1Attrib[attr] );
  83
  84          if (ctx->Eval.Map2Attrib[attr])
  85             set_active_eval2( exec, attr, 4, &ctx->EvalMap.Map2Attrib[attr] );
  86       }
  87    }
  88
  89    if (ctx->Eval.Map1Color4)
  90       set_active_eval1( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map1Color4 );
  91
  92    if (ctx->Eval.Map2Color4)
  93       set_active_eval2( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map2Color4 );
  94
  95    if (ctx->Eval.Map1TextureCoord4)
  96       set_active_eval1( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map1Texture4 );
  97    else if (ctx->Eval.Map1TextureCoord3)
  98       set_active_eval1( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map1Texture3 );
  99    else if (ctx->Eval.Map1TextureCoord2)
 100       set_active_eval1( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map1Texture2 );
 101    else if (ctx->Eval.Map1TextureCoord1)
 102       set_active_eval1( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map1Texture1 );
 103
 104    if (ctx->Eval.Map2TextureCoord4)
 105       set_active_eval2( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map2Texture4 );
 106    else if (ctx->Eval.Map2TextureCoord3)
 107       set_active_eval2( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map2Texture3 );
 108    else if (ctx->Eval.Map2TextureCoord2)
 109       set_active_eval2( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map2Texture2 );
 110    else if (ctx->Eval.Map2TextureCoord1)
 111       set_active_eval2( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map2Texture1 );
 112
 113    if (ctx->Eval.Map1Normal)
 114       set_active_eval1( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal );
 115
 116    if (ctx->Eval.Map2Normal)
 117       set_active_eval2( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal );
 118
 119    if (ctx->Eval.Map1Vertex4)
 120       set_active_eval1( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 );
 121    else if (ctx->Eval.Map1Vertex3)
 122       set_active_eval1( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 );
 123
 124    if (ctx->Eval.Map2Vertex4)
 125       set_active_eval2( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 );
 126    else if (ctx->Eval.Map2Vertex3)
 127       set_active_eval2( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 );
 128
 129    exec->eval.recalculate_maps = 0;
 130 }
 131
 132
 133
 134 void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u)
 135 {
 136    GLuint attr;
 137
 138    for (attr = 1; attr <= VBO_ATTRIB_INDEX; attr++) {
 139       struct gl_1d_map *map = exec->eval.map1[attr].map;
 140       if (map) {
 141          GLfloat uu = (u - map->u1) * map->du;
 142          GLfloat data[4];
 143
 144          ASSIGN_4V(data, 0, 0, 0, 1);
 145
 146          _math_horner_bezier_curve(map->Points, data, uu,
 147                                    exec->eval.map1[attr].sz,
 148                                    map->Order);
 149
 150          COPY_SZ_4V( exec->vtx.attrptr[attr],
 151                      exec->vtx.attrsz[attr],
 152                      data );
 153       }
 154    }
 155
 156    /** Vertex -- EvalCoord1f is a noop if this map not enabled:
 157     **/
 158    if (exec->eval.map1[0].map) {
 159       struct gl_1d_map *map = exec->eval.map1[0].map;
 160       GLfloat uu = (u - map->u1) * map->du;
 161       GLfloat vertex[4];
 162
 163       ASSIGN_4V(vertex, 0, 0, 0, 1);
 164
 165       _math_horner_bezier_curve(map->Points, vertex, uu,
 166                                 exec->eval.map1[0].sz,
 167                                 map->Order);
 168
 169       if (exec->eval.map1[0].sz == 4)
 170          CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
 171       else
 172          CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
 173    }
 174 }
 175
 176
 177
 178 void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
 179                               GLfloat u, GLfloat v )
 180 {
 181    GLuint attr;
 182
 183    for (attr = 1; attr <= VBO_ATTRIB_INDEX; attr++) {
 184       struct gl_2d_map *map = exec->eval.map2[attr].map;
 185       if (map) {
 186          GLfloat uu = (u - map->u1) * map->du;
 187          GLfloat vv = (v - map->v1) * map->dv;
 188          GLfloat data[4];
 189
 190          ASSIGN_4V(data, 0, 0, 0, 1);
 191
 192          _math_horner_bezier_surf(map->Points,
 193                                   data,
 194                                   uu, vv,
 195                                   exec->eval.map2[attr].sz,
 196                                   map->Uorder, map->Vorder);
 197
 198          COPY_SZ_4V( exec->vtx.attrptr[attr],
 199                      exec->vtx.attrsz[attr],
 200                      data );
 201       }
 202    }
 203
 204    /** Vertex -- EvalCoord2f is a noop if this map not enabled:
 205     **/
 206    if (exec->eval.map2[0].map) {
 207       struct gl_2d_map *map = exec->eval.map2[0].map;
 208       GLfloat uu = (u - map->u1) * map->du;
 209       GLfloat vv = (v - map->v1) * map->dv;
 210       GLfloat vertex[4];
 211
 212       ASSIGN_4V(vertex, 0, 0, 0, 1);
 213
 214       if (exec->ctx->Eval.AutoNormal) {
 215          GLfloat normal[4];
 216          GLfloat du[4], dv[4];
 217
 218          _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
 219                                  exec->eval.map2[0].sz,
 220                                  map->Uorder, map->Vorder);
 221
 222          if (exec->eval.map2[0].sz == 4) {
 223             du[0] = du[0]*vertex[3] - du[3]*vertex[0];
 224             du[1] = du[1]*vertex[3] - du[3]*vertex[1];
 225             du[2] = du[2]*vertex[3] - du[3]*vertex[2];
 226
 227             dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
 228             dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
 229             dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
 230          }
 231
 232
 233          CROSS3(normal, du, dv);
 234          NORMALIZE_3FV(normal);
 235          normal[3] = 1.0;
 236
 237          COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
 238                      exec->vtx.attrsz[VBO_ATTRIB_NORMAL],
 239                      normal );
 240
 241       }
 242       else {
 243          _math_horner_bezier_surf(map->Points, vertex, uu, vv,
 244                                   exec->eval.map2[0].sz,
 245                                   map->Uorder, map->Vorder);
 246       }
 247
 248       if (exec->vtx.attrsz[0] == 4)
 249          CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
 250       else
 251          CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
 252    }
 253 }
 254
 255