mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2025-12-25 17:20:10 +01:00
New files to provide glEvalPoint, glEvalCoord implementations for
driver tnl modules.
This commit is contained in:
Keith Whitwell
parent
2c2a956a3a
commit
bd58a63fe8
2 changed files with 367 additions and 0 deletions
324
src/mesa/main/api_eval.c
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324
src/mesa/main/api_eval.c
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/* $Id: api_eval.c,v 1.1 2001/06/04 13:57:35 keithw Exp $ */
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/*
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* Mesa 3-D graphics library
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* Version: 3.5
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*
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* Copyright (C) 1999-2001 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 <keithw@valinux.com>
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*/
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#include "glheader.h"
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#include "api_eval.h"
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#include "context.h"
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#include "macros.h"
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#include "mmath.h"
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#include "math/m_eval.h"
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static void do_EvalCoord1f(GLcontext* ctx, GLfloat u)
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{
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/** Color Index **/
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if (ctx->Eval.Map1Index)
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{
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GLfloat findex;
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struct gl_1d_map *map = &ctx->EvalMap.Map1Index;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, &findex, uu, 1, map->Order);
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glIndexi( (GLint) findex );
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}
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/** Color **/
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if (ctx->Eval.Map1Color4) {
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GLfloat fcolor[4];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Color4;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, fcolor, uu, 4, map->Order);
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glColor4fv( fcolor );
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}
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/** Normal Vector **/
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if (ctx->Eval.Map1Normal) {
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GLfloat normal[3];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Normal;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, normal, uu, 3, map->Order);
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glNormal3fv( normal );
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}
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/** Texture Coordinates **/
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if (ctx->Eval.Map1TextureCoord4) {
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GLfloat texcoord[4];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Texture4;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, texcoord, uu, 4, map->Order);
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glTexCoord4fv( texcoord );
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}
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else if (ctx->Eval.Map1TextureCoord3) {
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GLfloat texcoord[4];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Texture3;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, texcoord, uu, 3, map->Order);
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glTexCoord3fv( texcoord );
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}
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else if (ctx->Eval.Map1TextureCoord2) {
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GLfloat texcoord[4];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Texture2;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, texcoord, uu, 2, map->Order);
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glTexCoord2fv( texcoord );
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}
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else if (ctx->Eval.Map1TextureCoord1) {
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GLfloat texcoord[4];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Texture1;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, texcoord, uu, 1, map->Order);
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glTexCoord1fv( texcoord );
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}
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/** Vertex **/
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if (ctx->Eval.Map1Vertex4)
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{
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GLfloat vertex[4];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Vertex4;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, vertex, uu, 4, map->Order);
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glVertex4fv( vertex );
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}
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else if (ctx->Eval.Map1Vertex3)
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{
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GLfloat vertex[4];
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struct gl_1d_map *map = &ctx->EvalMap.Map1Vertex3;
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GLfloat uu = (u - map->u1) * map->du;
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_math_horner_bezier_curve(map->Points, vertex, uu, 3, map->Order);
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glVertex3fv( vertex );
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}
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}
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#define CROSS_PROD(n, u, v) \
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(n)[0] = (u)[1]*(v)[2] - (u)[2]*(v)[1]; \
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(n)[1] = (u)[2]*(v)[0] - (u)[0]*(v)[2]; \
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(n)[2] = (u)[0]*(v)[1] - (u)[1]*(v)[0]
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static void do_EvalCoord2f( GLcontext* ctx, GLfloat u, GLfloat v )
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{
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/** Color Index **/
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if (ctx->Eval.Map2Index) {
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GLfloat findex;
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struct gl_2d_map *map = &ctx->EvalMap.Map2Index;
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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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_math_horner_bezier_surf(map->Points, &findex, uu, vv, 1,
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map->Uorder, map->Vorder);
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glIndexi( (GLuint) (GLint) findex );
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}
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/** Color **/
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if (ctx->Eval.Map2Color4) {
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GLfloat fcolor[4];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Color4;
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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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_math_horner_bezier_surf(map->Points, fcolor, uu, vv, 4,
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map->Uorder, map->Vorder);
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glColor4fv( fcolor );
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}
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/** Normal **/
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if (ctx->Eval.Map2Normal &&
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(!ctx->Eval.AutoNormal || (!ctx->Eval.Map2Vertex3 &&
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!ctx->Eval.Map2Vertex4))) {
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GLfloat normal[3];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Normal;
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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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_math_horner_bezier_surf(map->Points, normal, uu, vv, 3,
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map->Uorder, map->Vorder);
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glNormal3fv( normal );
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}
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/** Texture Coordinates **/
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if (ctx->Eval.Map2TextureCoord4) {
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GLfloat texcoord[4];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Texture4;
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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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_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 4,
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map->Uorder, map->Vorder);
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glTexCoord4fv( texcoord );
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}
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else if (ctx->Eval.Map2TextureCoord3) {
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GLfloat texcoord[4];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Texture3;
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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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_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 3,
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map->Uorder, map->Vorder);
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glTexCoord3fv( texcoord );
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}
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else if (ctx->Eval.Map2TextureCoord2) {
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GLfloat texcoord[4];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Texture2;
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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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_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 2,
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map->Uorder, map->Vorder);
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glTexCoord2fv( texcoord );
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}
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else if (ctx->Eval.Map2TextureCoord1) {
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GLfloat texcoord[4];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Texture1;
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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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_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 1,
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map->Uorder, map->Vorder);
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glTexCoord1fv( texcoord );
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}
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/** Vertex **/
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if(ctx->Eval.Map2Vertex4) {
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GLfloat vertex[4];
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GLfloat normal[3];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex4;
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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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if (ctx->Eval.AutoNormal) {
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GLfloat du[4], dv[4];
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_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 4,
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map->Uorder, map->Vorder);
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CROSS_PROD(normal, du, dv);
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NORMALIZE_3FV(normal);
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}
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else {
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_math_horner_bezier_surf(map->Points, vertex, uu, vv, 4,
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map->Uorder, map->Vorder);
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}
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}
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else if (ctx->Eval.Map2Vertex3) {
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GLfloat vertex[4];
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struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex3;
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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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if (ctx->Eval.AutoNormal) {
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GLfloat du[3], dv[3];
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GLfloat normal[3];
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_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 3,
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map->Uorder, map->Vorder);
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CROSS_PROD(normal, du, dv);
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NORMALIZE_3FV(normal);
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glNormal3fv( normal );
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glVertex3fv( vertex );
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}
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else {
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_math_horner_bezier_surf(map->Points, vertex, uu, vv, 3,
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map->Uorder, map->Vorder);
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glVertex3fv( vertex );
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}
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}
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}
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void _mesa_EvalPoint1( GLint i )
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{
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GET_CURRENT_CONTEXT( ctx );
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GLfloat du = ((ctx->Eval.MapGrid1u2 - ctx->Eval.MapGrid1u1) /
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(GLfloat) ctx->Eval.MapGrid1un);
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GLfloat u = i * du + ctx->Eval.MapGrid1u1;
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glEvalCoord1f( u );
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}
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void _mesa_EvalPoint2( GLint i, GLint j )
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{
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GET_CURRENT_CONTEXT( ctx );
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GLfloat du = ((ctx->Eval.MapGrid2u2 - ctx->Eval.MapGrid2u1) /
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(GLfloat) ctx->Eval.MapGrid2un);
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GLfloat dv = ((ctx->Eval.MapGrid2v2 - ctx->Eval.MapGrid2v1) /
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(GLfloat) ctx->Eval.MapGrid2vn);
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GLfloat u = i * du + ctx->Eval.MapGrid2u1;
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GLfloat v = j * dv + ctx->Eval.MapGrid2v1;
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glEvalCoord2f( u, v );
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}
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/* Wierd thing about eval is that it doesn't affect 'current' values.
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* This technique of saving and resetting current values requires
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* that:
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*
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* 1) Current values are updated immediately in the glColor,
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* etc. functions.
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*
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* 2) Hardware color values are stored seperately from ctx->Current,
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* for example in dma buffers, or direct emit to registers.
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*/
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void _mesa_EvalCoord1f( GLfloat u )
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{
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GET_CURRENT_CONTEXT( ctx );
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GLfloat normal[3], texcoord[4], color[4];
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GLuint index;
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COPY_3FV( normal, ctx->Current.Normal );
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COPY_4FV( texcoord, ctx->Current.Texcoord[0] );
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COPY_4FV( color, ctx->Current.Color );
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index = ctx->Current.Index;
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do_EvalCoord1f( ctx, u );
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COPY_3FV( ctx->Current.Normal, normal );
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COPY_4FV( ctx->Current.Texcoord[0], texcoord );
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COPY_4FV( ctx->Current.Color, color );
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ctx->Current.Index = index;
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}
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void _mesa_EvalCoord2f( GLfloat u, GLfloat v )
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{
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GET_CURRENT_CONTEXT( ctx );
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GLfloat normal[3], texcoord[4], color[4];
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GLuint index;
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COPY_3FV( normal, ctx->Current.Normal );
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COPY_4FV( texcoord, ctx->Current.Texcoord[0] );
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COPY_4FV( color, ctx->Current.Color );
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index = ctx->Current.Index;
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do_EvalCoord2f( ctx, u, v );
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COPY_3FV( ctx->Current.Normal, normal );
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COPY_4FV( ctx->Current.Texcoord[0], texcoord );
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COPY_4FV( ctx->Current.Color, color );
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ctx->Current.Index = index;
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}
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void _mesa_EvalCoord1fv( const GLfloat *u )
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{
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glEvalCoord1f( u[0] );
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}
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void _mesa_EvalCoord2fv( const GLfloat *u )
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{
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glEvalCoord2f( u[0], u[1] );
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}
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43
src/mesa/main/api_eval.h
Normal file
43
src/mesa/main/api_eval.h
Normal file
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@ -0,0 +1,43 @@
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/* $Id: api_eval.h,v 1.1 2001/06/04 13:57:35 keithw Exp $ */
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/*
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* Mesa 3-D graphics library
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* Version: 3.5
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*
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* Copyright (C) 1999-2001 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
|
||||
* 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
|
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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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#ifndef API_EVAL_H
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#define API_EVAL_H
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#include "mtypes.h"
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extern void _mesa_EvalPoint1( GLint i );
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extern void _mesa_EvalPoint2( GLint i, GLint j );
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extern void _mesa_EvalCoord1f( GLfloat u );
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extern void _mesa_EvalCoord2f( GLfloat u, GLfloat v );
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extern void _mesa_EvalCoord1fv( const GLfloat *u );
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extern void _mesa_EvalCoord2fv( const GLfloat *u );
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#endif
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