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  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 <keith@tungstengraphics.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 < Elements(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 < Elements(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 < Elements(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 < Elements(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 = 0;
  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.          GLfloat data[4];
  134.  
  135.          ASSIGN_4V(data, 0, 0, 0, 1);
  136.  
  137.          _math_horner_bezier_curve(map->Points, data, uu,
  138.                                    exec->eval.map1[attr].sz,
  139.                                    map->Order);
  140.  
  141.          COPY_SZ_4V( exec->vtx.attrptr[attr],
  142.                      exec->vtx.attrsz[attr],
  143.                      data );
  144.       }
  145.    }
  146.  
  147.    /** Vertex -- EvalCoord1f is a noop if this map not enabled:
  148.     **/
  149.    if (exec->eval.map1[0].map) {
  150.       struct gl_1d_map *map = exec->eval.map1[0].map;
  151.       GLfloat uu = (u - map->u1) * map->du;
  152.       GLfloat vertex[4];
  153.  
  154.       ASSIGN_4V(vertex, 0, 0, 0, 1);
  155.  
  156.       _math_horner_bezier_curve(map->Points, vertex, uu,
  157.                                 exec->eval.map1[0].sz,
  158.                                 map->Order);
  159.  
  160.       if (exec->eval.map1[0].sz == 4)
  161.          CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
  162.       else
  163.          CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
  164.    }
  165. }
  166.  
  167.  
  168.  
  169. void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
  170.                               GLfloat u, GLfloat v )
  171. {  
  172.    GLuint attr;
  173.  
  174.    for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
  175.       struct gl_2d_map *map = exec->eval.map2[attr].map;
  176.       if (map) {
  177.          GLfloat uu = (u - map->u1) * map->du;
  178.          GLfloat vv = (v - map->v1) * map->dv;
  179.          GLfloat data[4];
  180.  
  181.          ASSIGN_4V(data, 0, 0, 0, 1);
  182.  
  183.          _math_horner_bezier_surf(map->Points,
  184.                                   data,
  185.                                   uu, vv,
  186.                                   exec->eval.map2[attr].sz,
  187.                                   map->Uorder, map->Vorder);
  188.  
  189.          COPY_SZ_4V( exec->vtx.attrptr[attr],
  190.                      exec->vtx.attrsz[attr],
  191.                      data );
  192.       }
  193.    }
  194.  
  195.    /** Vertex -- EvalCoord2f is a noop if this map not enabled:
  196.     **/
  197.    if (exec->eval.map2[0].map) {
  198.       struct gl_2d_map *map = exec->eval.map2[0].map;
  199.       GLfloat uu = (u - map->u1) * map->du;
  200.       GLfloat vv = (v - map->v1) * map->dv;
  201.       GLfloat vertex[4];
  202.  
  203.       ASSIGN_4V(vertex, 0, 0, 0, 1);
  204.  
  205.       if (exec->ctx->Eval.AutoNormal) {
  206.          GLfloat normal[4];
  207.          GLfloat du[4], dv[4];
  208.  
  209.          _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
  210.                                  exec->eval.map2[0].sz,
  211.                                  map->Uorder, map->Vorder);
  212.  
  213.          if (exec->eval.map2[0].sz == 4) {
  214.             du[0] = du[0]*vertex[3] - du[3]*vertex[0];
  215.             du[1] = du[1]*vertex[3] - du[3]*vertex[1];
  216.             du[2] = du[2]*vertex[3] - du[3]*vertex[2];
  217.          
  218.             dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
  219.             dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
  220.             dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
  221.          }
  222.  
  223.  
  224.          CROSS3(normal, du, dv);
  225.          NORMALIZE_3FV(normal);
  226.          normal[3] = 1.0;
  227.  
  228.          COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
  229.                      exec->vtx.attrsz[VBO_ATTRIB_NORMAL],
  230.                      normal );
  231.  
  232.       }
  233.       else {
  234.          _math_horner_bezier_surf(map->Points, vertex, uu, vv,
  235.                                   exec->eval.map2[0].sz,
  236.                                   map->Uorder, map->Vorder);
  237.       }
  238.  
  239.       if (exec->vtx.attrsz[0] == 4)
  240.          CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
  241.       else
  242.          CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
  243.    }
  244. }
  245.  
  246.  
  247.