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-rw-r--r--src/mesa/main/api_eval.c324
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diff --git a/src/mesa/main/api_eval.c b/src/mesa/main/api_eval.c
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-/*
- * Mesa 3-D graphics library
- * Version: 5.1
- *
- * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
- *
- * 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
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Keith Whitwell <[email protected]>
- */
-
-#include "glheader.h"
-#include "api_eval.h"
-#include "context.h"
-#include "macros.h"
-#include "math/m_eval.h"
-
-static void do_EvalCoord1f(GLcontext* ctx, GLfloat u)
-{
-
- /** Color Index **/
- if (ctx->Eval.Map1Index)
- {
- GLfloat findex;
- struct gl_1d_map *map = &ctx->EvalMap.Map1Index;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, &findex, uu, 1, map->Order);
- glIndexi( (GLint) findex );
- }
-
- /** Color **/
- if (ctx->Eval.Map1Color4) {
- GLfloat fcolor[4];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Color4;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, fcolor, uu, 4, map->Order);
- glColor4fv( fcolor );
- }
-
- /** Normal Vector **/
- if (ctx->Eval.Map1Normal) {
- GLfloat normal[3];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Normal;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, normal, uu, 3, map->Order);
- glNormal3fv( normal );
- }
-
- /** Texture Coordinates **/
- if (ctx->Eval.Map1TextureCoord4) {
- GLfloat texcoord[4];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Texture4;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, texcoord, uu, 4, map->Order);
- glTexCoord4fv( texcoord );
- }
- else if (ctx->Eval.Map1TextureCoord3) {
- GLfloat texcoord[4];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Texture3;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, texcoord, uu, 3, map->Order);
- glTexCoord3fv( texcoord );
- }
- else if (ctx->Eval.Map1TextureCoord2) {
- GLfloat texcoord[4];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Texture2;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, texcoord, uu, 2, map->Order);
- glTexCoord2fv( texcoord );
- }
- else if (ctx->Eval.Map1TextureCoord1) {
- GLfloat texcoord[4];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Texture1;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, texcoord, uu, 1, map->Order);
- glTexCoord1fv( texcoord );
- }
-
- /** Vertex **/
- if (ctx->Eval.Map1Vertex4)
- {
- GLfloat vertex[4];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Vertex4;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, vertex, uu, 4, map->Order);
- glVertex4fv( vertex );
- }
- else if (ctx->Eval.Map1Vertex3)
- {
- GLfloat vertex[4];
- struct gl_1d_map *map = &ctx->EvalMap.Map1Vertex3;
- GLfloat uu = (u - map->u1) * map->du;
- _math_horner_bezier_curve(map->Points, vertex, uu, 3, map->Order);
- glVertex3fv( vertex );
- }
-}
-
-#define CROSS_PROD(n, u, v) \
- (n)[0] = (u)[1]*(v)[2] - (u)[2]*(v)[1]; \
- (n)[1] = (u)[2]*(v)[0] - (u)[0]*(v)[2]; \
- (n)[2] = (u)[0]*(v)[1] - (u)[1]*(v)[0]
-
-
-static void do_EvalCoord2f( GLcontext* ctx, GLfloat u, GLfloat v )
-{
- /** Color Index **/
- if (ctx->Eval.Map2Index) {
- GLfloat findex;
- struct gl_2d_map *map = &ctx->EvalMap.Map2Index;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- _math_horner_bezier_surf(map->Points, &findex, uu, vv, 1,
- map->Uorder, map->Vorder);
- glIndexi( (GLuint) (GLint) findex );
- }
-
- /** Color **/
- if (ctx->Eval.Map2Color4) {
- GLfloat fcolor[4];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Color4;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- _math_horner_bezier_surf(map->Points, fcolor, uu, vv, 4,
- map->Uorder, map->Vorder);
- glColor4fv( fcolor );
- }
-
- /** Normal **/
- if (ctx->Eval.Map2Normal &&
- (!ctx->Eval.AutoNormal || (!ctx->Eval.Map2Vertex3 &&
- !ctx->Eval.Map2Vertex4))) {
- GLfloat normal[3];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Normal;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- _math_horner_bezier_surf(map->Points, normal, uu, vv, 3,
- map->Uorder, map->Vorder);
- glNormal3fv( normal );
- }
-
- /** Texture Coordinates **/
- if (ctx->Eval.Map2TextureCoord4) {
- GLfloat texcoord[4];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Texture4;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 4,
- map->Uorder, map->Vorder);
- glTexCoord4fv( texcoord );
- }
- else if (ctx->Eval.Map2TextureCoord3) {
- GLfloat texcoord[4];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Texture3;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 3,
- map->Uorder, map->Vorder);
- glTexCoord3fv( texcoord );
- }
- else if (ctx->Eval.Map2TextureCoord2) {
- GLfloat texcoord[4];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Texture2;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 2,
- map->Uorder, map->Vorder);
- glTexCoord2fv( texcoord );
- }
- else if (ctx->Eval.Map2TextureCoord1) {
- GLfloat texcoord[4];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Texture1;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 1,
- map->Uorder, map->Vorder);
- glTexCoord1fv( texcoord );
- }
-
- /** Vertex **/
- if(ctx->Eval.Map2Vertex4) {
- GLfloat vertex[4];
- GLfloat normal[3];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex4;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
-
- if (ctx->Eval.AutoNormal) {
- GLfloat du[4], dv[4];
-
- _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 4,
- map->Uorder, map->Vorder);
-
- CROSS_PROD(normal, du, dv);
- NORMALIZE_3FV(normal);
- glNormal3fv( normal );
- glVertex4fv( vertex );
- }
- else {
- _math_horner_bezier_surf(map->Points, vertex, uu, vv, 4,
- map->Uorder, map->Vorder);
- glVertex4fv( vertex );
- }
- }
- else if (ctx->Eval.Map2Vertex3) {
- GLfloat vertex[4];
- struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex3;
- GLfloat uu = (u - map->u1) * map->du;
- GLfloat vv = (v - map->v1) * map->dv;
- if (ctx->Eval.AutoNormal) {
- GLfloat du[3], dv[3];
- GLfloat normal[3];
- _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 3,
- map->Uorder, map->Vorder);
- CROSS_PROD(normal, du, dv);
- NORMALIZE_3FV(normal);
- glNormal3fv( normal );
- glVertex3fv( vertex );
- }
- else {
- _math_horner_bezier_surf(map->Points, vertex, uu, vv, 3,
- map->Uorder, map->Vorder);
- glVertex3fv( vertex );
- }
- }
-}
-
-
-void _mesa_EvalPoint1( GLint i )
-{
- GET_CURRENT_CONTEXT( ctx );
- GLfloat du = ((ctx->Eval.MapGrid1u2 - ctx->Eval.MapGrid1u1) /
- (GLfloat) ctx->Eval.MapGrid1un);
- GLfloat u = i * du + ctx->Eval.MapGrid1u1;
-
- glEvalCoord1f( u );
-}
-
-
-void _mesa_EvalPoint2( GLint i, GLint j )
-{
- GET_CURRENT_CONTEXT( ctx );
- GLfloat du = ((ctx->Eval.MapGrid2u2 - ctx->Eval.MapGrid2u1) /
- (GLfloat) ctx->Eval.MapGrid2un);
- GLfloat dv = ((ctx->Eval.MapGrid2v2 - ctx->Eval.MapGrid2v1) /
- (GLfloat) ctx->Eval.MapGrid2vn);
- GLfloat u = i * du + ctx->Eval.MapGrid2u1;
- GLfloat v = j * dv + ctx->Eval.MapGrid2v1;
-
- glEvalCoord2f( u, v );
-}
-
-/* Wierd thing about eval is that it doesn't affect 'current' values.
- * This technique of saving and resetting current values requires
- * that:
- *
- * 1) Current values are updated immediately in the glColor,
- * etc. functions.
- *
- * 2) Hardware color values are stored seperately from ctx->Current,
- * for example in dma buffers, or direct emit to registers.
- */
-void _mesa_EvalCoord1f( GLfloat u )
-{
- GET_CURRENT_CONTEXT( ctx );
- GLfloat normal[3], texcoord[4], color[4];
- GLuint index;
-
- COPY_3FV( normal, ctx->Current.Attrib[VERT_ATTRIB_NORMAL] );
- COPY_4FV( texcoord, ctx->Current.Attrib[VERT_ATTRIB_TEX0] );
- COPY_4FV( color, ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
- index = ctx->Current.Index;
-
- do_EvalCoord1f( ctx, u );
-
- COPY_3FV( ctx->Current.Attrib[VERT_ATTRIB_NORMAL], normal );
- COPY_4FV( ctx->Current.Attrib[VERT_ATTRIB_TEX0], texcoord );
- COPY_4FV( ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color );
- ctx->Current.Index = index;
-}
-
-void _mesa_EvalCoord2f( GLfloat u, GLfloat v )
-{
- GET_CURRENT_CONTEXT( ctx );
- GLfloat normal[3], texcoord[4], color[4];
- GLuint index;
-
- COPY_3FV( normal, ctx->Current.Attrib[VERT_ATTRIB_NORMAL] );
- COPY_4FV( texcoord, ctx->Current.Attrib[VERT_ATTRIB_TEX0] );
- COPY_4FV( color, ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
- index = ctx->Current.Index;
-
- do_EvalCoord2f( ctx, u, v );
-
- COPY_3FV( ctx->Current.Attrib[VERT_ATTRIB_NORMAL], normal );
- COPY_4FV( ctx->Current.Attrib[VERT_ATTRIB_TEX0], texcoord );
- COPY_4FV( ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color );
- ctx->Current.Index = index;
-}
-
-void _mesa_EvalCoord1fv( const GLfloat *u )
-{
- glEvalCoord1f( u[0] );
-}
-
-void _mesa_EvalCoord2fv( const GLfloat *u )
-{
- glEvalCoord2f( u[0], u[1] );
-}
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