mirror of
https://github.com/reactos/reactos.git
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240 lines
7.2 KiB
C
240 lines
7.2 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 6.1
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*
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* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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#include <precomp.h>
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static void clear_active_eval1( struct vbo_exec_context *exec, GLuint attr )
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{
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assert(attr < Elements(exec->eval.map1));
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exec->eval.map1[attr].map = NULL;
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}
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static void clear_active_eval2( struct vbo_exec_context *exec, GLuint attr )
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{
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assert(attr < Elements(exec->eval.map2));
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exec->eval.map2[attr].map = NULL;
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}
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static void set_active_eval1( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
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struct gl_1d_map *map )
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{
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assert(attr < Elements(exec->eval.map1));
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if (!exec->eval.map1[attr].map) {
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exec->eval.map1[attr].map = map;
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exec->eval.map1[attr].sz = dim;
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}
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}
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static void set_active_eval2( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
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struct gl_2d_map *map )
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{
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assert(attr < Elements(exec->eval.map2));
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if (!exec->eval.map2[attr].map) {
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exec->eval.map2[attr].map = map;
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exec->eval.map2[attr].sz = dim;
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}
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}
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void vbo_exec_eval_update( struct vbo_exec_context *exec )
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{
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struct gl_context *ctx = exec->ctx;
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GLuint attr;
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/* Vertex program maps have priority over conventional attribs */
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for (attr = 0; attr < VBO_ATTRIB_FIRST_MATERIAL; attr++) {
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clear_active_eval1( exec, attr );
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clear_active_eval2( exec, attr );
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}
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if (ctx->Eval.Map1Color4)
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set_active_eval1( exec, VBO_ATTRIB_COLOR, 4, &ctx->EvalMap.Map1Color4 );
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if (ctx->Eval.Map2Color4)
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set_active_eval2( exec, VBO_ATTRIB_COLOR, 4, &ctx->EvalMap.Map2Color4 );
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if (ctx->Eval.Map1TextureCoord4)
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set_active_eval1( exec, VBO_ATTRIB_TEX, 4, &ctx->EvalMap.Map1Texture4 );
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else if (ctx->Eval.Map1TextureCoord3)
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set_active_eval1( exec, VBO_ATTRIB_TEX, 3, &ctx->EvalMap.Map1Texture3 );
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else if (ctx->Eval.Map1TextureCoord2)
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set_active_eval1( exec, VBO_ATTRIB_TEX, 2, &ctx->EvalMap.Map1Texture2 );
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else if (ctx->Eval.Map1TextureCoord1)
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set_active_eval1( exec, VBO_ATTRIB_TEX, 1, &ctx->EvalMap.Map1Texture1 );
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if (ctx->Eval.Map2TextureCoord4)
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set_active_eval2( exec, VBO_ATTRIB_TEX, 4, &ctx->EvalMap.Map2Texture4 );
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else if (ctx->Eval.Map2TextureCoord3)
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set_active_eval2( exec, VBO_ATTRIB_TEX, 3, &ctx->EvalMap.Map2Texture3 );
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else if (ctx->Eval.Map2TextureCoord2)
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set_active_eval2( exec, VBO_ATTRIB_TEX, 2, &ctx->EvalMap.Map2Texture2 );
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else if (ctx->Eval.Map2TextureCoord1)
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set_active_eval2( exec, VBO_ATTRIB_TEX, 1, &ctx->EvalMap.Map2Texture1 );
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if (ctx->Eval.Map1Normal)
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set_active_eval1( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal );
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if (ctx->Eval.Map2Normal)
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set_active_eval2( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal );
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if (ctx->Eval.Map1Vertex4)
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set_active_eval1( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 );
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else if (ctx->Eval.Map1Vertex3)
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set_active_eval1( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 );
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if (ctx->Eval.Map2Vertex4)
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set_active_eval2( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 );
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else if (ctx->Eval.Map2Vertex3)
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set_active_eval2( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 );
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exec->eval.recalculate_maps = 0;
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}
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void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u)
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{
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GLuint attr;
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for (attr = 1; attr <= VBO_ATTRIB_TEX; attr++) {
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struct gl_1d_map *map = exec->eval.map1[attr].map;
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if (map) {
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GLfloat uu = (u - map->u1) * map->du;
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GLfloat data[4];
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ASSIGN_4V(data, 0, 0, 0, 1);
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_math_horner_bezier_curve(map->Points, data, uu,
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exec->eval.map1[attr].sz,
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map->Order);
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COPY_SZ_4V( exec->vtx.attrptr[attr],
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exec->vtx.attrsz[attr],
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data );
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}
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}
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/** Vertex -- EvalCoord1f is a noop if this map not enabled:
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**/
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if (exec->eval.map1[0].map) {
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struct gl_1d_map *map = exec->eval.map1[0].map;
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GLfloat uu = (u - map->u1) * map->du;
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GLfloat vertex[4];
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ASSIGN_4V(vertex, 0, 0, 0, 1);
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_math_horner_bezier_curve(map->Points, vertex, uu,
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exec->eval.map1[0].sz,
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map->Order);
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if (exec->eval.map1[0].sz == 4)
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CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
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else
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CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
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}
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}
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void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
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GLfloat u, GLfloat v )
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{
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GLuint attr;
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for (attr = 1; attr <= VBO_ATTRIB_TEX; attr++) {
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struct gl_2d_map *map = exec->eval.map2[attr].map;
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if (map) {
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GLfloat uu = (u - map->u1) * map->du;
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GLfloat vv = (v - map->v1) * map->dv;
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GLfloat data[4];
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ASSIGN_4V(data, 0, 0, 0, 1);
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_math_horner_bezier_surf(map->Points,
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data,
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uu, vv,
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exec->eval.map2[attr].sz,
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map->Uorder, map->Vorder);
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COPY_SZ_4V( exec->vtx.attrptr[attr],
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exec->vtx.attrsz[attr],
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data );
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}
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}
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/** Vertex -- EvalCoord2f is a noop if this map not enabled:
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**/
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if (exec->eval.map2[0].map) {
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struct gl_2d_map *map = exec->eval.map2[0].map;
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GLfloat uu = (u - map->u1) * map->du;
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GLfloat vv = (v - map->v1) * map->dv;
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GLfloat vertex[4];
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ASSIGN_4V(vertex, 0, 0, 0, 1);
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if (exec->ctx->Eval.AutoNormal) {
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GLfloat normal[4];
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GLfloat du[4], dv[4];
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_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
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exec->eval.map2[0].sz,
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map->Uorder, map->Vorder);
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if (exec->eval.map2[0].sz == 4) {
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du[0] = du[0]*vertex[3] - du[3]*vertex[0];
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du[1] = du[1]*vertex[3] - du[3]*vertex[1];
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du[2] = du[2]*vertex[3] - du[3]*vertex[2];
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dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
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dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
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dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
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}
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CROSS3(normal, du, dv);
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NORMALIZE_3FV(normal);
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normal[3] = 1.0;
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COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
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exec->vtx.attrsz[VBO_ATTRIB_NORMAL],
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normal );
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}
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else {
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_math_horner_bezier_surf(map->Points, vertex, uu, vv,
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exec->eval.map2[0].sz,
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map->Uorder, map->Vorder);
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}
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if (exec->vtx.attrsz[0] == 4)
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CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
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else
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CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
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}
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}
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