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/*
* Mesa 3-D graphics library
* Version: 6.1
*
* Copyright (C) 1999-2004 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 <keith@tungstengraphics.com>
*/
#include "glheader.h"
#include "api_eval.h"
#include "context.h"
#include "macros.h"
#include "math/m_eval.h"
#include "t_vtx_api.h"
static void clear_active_eval1( TNLcontext *tnl, GLuint attr )
{
tnl->vtx.eval.map1[attr].map = 0;
}
static void clear_active_eval2( TNLcontext *tnl, GLuint attr )
{
tnl->vtx.eval.map2[attr].map = 0;
}
static void set_active_eval1( TNLcontext *tnl, GLuint attr, GLuint dim,
struct gl_1d_map *map )
{
if (!tnl->vtx.eval.map1[attr].map) {
tnl->vtx.eval.map1[attr].map = map;
tnl->vtx.eval.map1[attr].sz = dim;
}
}
static void set_active_eval2( TNLcontext *tnl, GLuint attr, GLuint dim,
struct gl_2d_map *map )
{
if (!tnl->vtx.eval.map2[attr].map) {
tnl->vtx.eval.map2[attr].map = map;
tnl->vtx.eval.map2[attr].sz = dim;
}
}
void _tnl_update_eval( GLcontext *ctx )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
GLuint attr;
/* Vertex program maps have priority over conventional attribs */
for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
clear_active_eval1( tnl, attr );
clear_active_eval2( tnl, attr );
}
if (ctx->VertexProgram._Enabled) {
for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
if (ctx->Eval.Map1Attrib[attr])
set_active_eval1( tnl, attr, 4, &ctx->EvalMap.Map1Attrib[attr] );
if (ctx->Eval.Map2Attrib[attr])
set_active_eval2( tnl, attr, 4, &ctx->EvalMap.Map2Attrib[attr] );
}
}
if (ctx->Eval.Map1Color4)
set_active_eval1( tnl, VERT_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map1Color4 );
if (ctx->Eval.Map2Color4)
set_active_eval2( tnl, VERT_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map2Color4 );
if (ctx->Eval.Map1TextureCoord4)
set_active_eval1( tnl, VERT_ATTRIB_TEX0, 4, &ctx->EvalMap.Map1Texture4 );
else if (ctx->Eval.Map1TextureCoord3)
set_active_eval1( tnl, VERT_ATTRIB_TEX0, 3, &ctx->EvalMap.Map1Texture3 );
else if (ctx->Eval.Map1TextureCoord2)
set_active_eval1( tnl, VERT_ATTRIB_TEX0, 2, &ctx->EvalMap.Map1Texture2 );
else if (ctx->Eval.Map1TextureCoord1)
set_active_eval1( tnl, VERT_ATTRIB_TEX0, 1, &ctx->EvalMap.Map1Texture1 );
if (ctx->Eval.Map2TextureCoord4)
set_active_eval2( tnl, VERT_ATTRIB_TEX0, 4, &ctx->EvalMap.Map2Texture4 );
else if (ctx->Eval.Map2TextureCoord3)
set_active_eval2( tnl, VERT_ATTRIB_TEX0, 3, &ctx->EvalMap.Map2Texture3 );
else if (ctx->Eval.Map2TextureCoord2)
set_active_eval2( tnl, VERT_ATTRIB_TEX0, 2, &ctx->EvalMap.Map2Texture2 );
else if (ctx->Eval.Map2TextureCoord1)
set_active_eval2( tnl, VERT_ATTRIB_TEX0, 1, &ctx->EvalMap.Map2Texture1 );
if (ctx->Eval.Map1Normal)
set_active_eval1( tnl, VERT_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal );
if (ctx->Eval.Map2Normal)
set_active_eval2( tnl, VERT_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal );
if (ctx->Eval.Map1Vertex4)
set_active_eval1( tnl, VERT_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 );
else if (ctx->Eval.Map1Vertex3)
set_active_eval1( tnl, VERT_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 );
if (ctx->Eval.Map2Vertex4)
set_active_eval2( tnl, VERT_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 );
else if (ctx->Eval.Map2Vertex3)
set_active_eval2( tnl, VERT_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 );
tnl->vtx.eval.new_state = 0;
}
void _tnl_do_EvalCoord1f(GLcontext* ctx, GLfloat u)
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
GLuint attr;
for (attr = 1; attr <= _TNL_ATTRIB_INDEX; attr++) {
struct gl_1d_map *map = tnl->vtx.eval.map1[attr].map;
if (map) {
GLfloat uu = (u - map->u1) * map->du;
GLfloat data[4];
ASSIGN_4V(data, 0, 0, 0, 1);
_math_horner_bezier_curve(map->Points, data, uu,
tnl->vtx.eval.map1[attr].sz,
map->Order);
COPY_SZ_4V( tnl->vtx.attrptr[attr],
tnl->vtx.attrsz[attr],
data );
}
}
/** Vertex -- EvalCoord1f is a noop if this map not enabled:
**/
if (tnl->vtx.eval.map1[0].map) {
struct gl_1d_map *map = tnl->vtx.eval.map1[0].map;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vertex[4];
ASSIGN_4V(vertex, 0, 0, 0, 1);
_math_horner_bezier_curve(map->Points, vertex, uu,
tnl->vtx.eval.map1[0].sz,
map->Order);
if (tnl->vtx.eval.map1[0].sz == 4)
GL_CALL(Vertex4fv)( vertex );
else
GL_CALL(Vertex3fv)( vertex );
}
}
void _tnl_do_EvalCoord2f( GLcontext* ctx, GLfloat u, GLfloat v )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
GLuint attr;
for (attr = 1; attr <= _TNL_ATTRIB_INDEX; attr++) {
struct gl_2d_map *map = tnl->vtx.eval.map2[attr].map;
if (map) {
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
GLfloat data[4];
ASSIGN_4V(data, 0, 0, 0, 1);
_math_horner_bezier_surf(map->Points,
data,
uu, vv,
tnl->vtx.eval.map2[attr].sz,
map->Uorder, map->Vorder);
COPY_SZ_4V( tnl->vtx.attrptr[attr],
tnl->vtx.attrsz[attr],
data );
}
}
/** Vertex -- EvalCoord2f is a noop if this map not enabled:
**/
if (tnl->vtx.eval.map2[0].map) {
struct gl_2d_map *map = tnl->vtx.eval.map2[0].map;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
GLfloat vertex[4];
ASSIGN_4V(vertex, 0, 0, 0, 1);
if (ctx->Eval.AutoNormal) {
GLfloat normal[4];
GLfloat du[4], dv[4];
_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
tnl->vtx.eval.map2[0].sz,
map->Uorder, map->Vorder);
if (tnl->vtx.eval.map2[0].sz == 4) {
du[0] = du[0]*vertex[3] - du[3]*vertex[0];
du[1] = du[1]*vertex[3] - du[3]*vertex[1];
du[2] = du[2]*vertex[3] - du[3]*vertex[2];
dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
}
CROSS3(normal, du, dv);
NORMALIZE_3FV(normal);
normal[3] = 1.0;
COPY_SZ_4V( tnl->vtx.attrptr[_TNL_ATTRIB_NORMAL],
tnl->vtx.attrsz[_TNL_ATTRIB_NORMAL],
normal );
}
else {
_math_horner_bezier_surf(map->Points, vertex, uu, vv,
tnl->vtx.eval.map2[0].sz,
map->Uorder, map->Vorder);
}
if (tnl->vtx.attrsz[0] == 4)
GL_CALL(Vertex4fv)( vertex );
else
GL_CALL(Vertex3fv)( vertex );
}
}
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