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/* |
* Mesa 3-D graphics library |
* |
* 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 |
* THE AUTHORS OR COPYRIGHT HOLDERS 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> |
*/ |
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#include "main/glheader.h" |
#include "main/context.h" |
#include "main/macros.h" |
#include "math/m_eval.h" |
#include "main/dispatch.h" |
#include "vbo_exec.h" |
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static void clear_active_eval1( struct vbo_exec_context *exec, GLuint attr ) |
{ |
assert(attr < Elements(exec->eval.map1)); |
exec->eval.map1[attr].map = NULL; |
} |
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static void clear_active_eval2( struct vbo_exec_context *exec, GLuint attr ) |
{ |
assert(attr < Elements(exec->eval.map2)); |
exec->eval.map2[attr].map = NULL; |
} |
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static void set_active_eval1( struct vbo_exec_context *exec, GLuint attr, GLuint dim, |
struct gl_1d_map *map ) |
{ |
assert(attr < Elements(exec->eval.map1)); |
if (!exec->eval.map1[attr].map) { |
exec->eval.map1[attr].map = map; |
exec->eval.map1[attr].sz = dim; |
} |
} |
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static void set_active_eval2( struct vbo_exec_context *exec, GLuint attr, GLuint dim, |
struct gl_2d_map *map ) |
{ |
assert(attr < Elements(exec->eval.map2)); |
if (!exec->eval.map2[attr].map) { |
exec->eval.map2[attr].map = map; |
exec->eval.map2[attr].sz = dim; |
} |
} |
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void vbo_exec_eval_update( struct vbo_exec_context *exec ) |
{ |
struct gl_context *ctx = exec->ctx; |
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++) { |
clear_active_eval1( exec, attr ); |
clear_active_eval2( exec, attr ); |
} |
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if (ctx->Eval.Map1Color4) |
set_active_eval1( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map1Color4 ); |
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if (ctx->Eval.Map2Color4) |
set_active_eval2( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map2Color4 ); |
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if (ctx->Eval.Map1TextureCoord4) |
set_active_eval1( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map1Texture4 ); |
else if (ctx->Eval.Map1TextureCoord3) |
set_active_eval1( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map1Texture3 ); |
else if (ctx->Eval.Map1TextureCoord2) |
set_active_eval1( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map1Texture2 ); |
else if (ctx->Eval.Map1TextureCoord1) |
set_active_eval1( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map1Texture1 ); |
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if (ctx->Eval.Map2TextureCoord4) |
set_active_eval2( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map2Texture4 ); |
else if (ctx->Eval.Map2TextureCoord3) |
set_active_eval2( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map2Texture3 ); |
else if (ctx->Eval.Map2TextureCoord2) |
set_active_eval2( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map2Texture2 ); |
else if (ctx->Eval.Map2TextureCoord1) |
set_active_eval2( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map2Texture1 ); |
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if (ctx->Eval.Map1Normal) |
set_active_eval1( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal ); |
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if (ctx->Eval.Map2Normal) |
set_active_eval2( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal ); |
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if (ctx->Eval.Map1Vertex4) |
set_active_eval1( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 ); |
else if (ctx->Eval.Map1Vertex3) |
set_active_eval1( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 ); |
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if (ctx->Eval.Map2Vertex4) |
set_active_eval2( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 ); |
else if (ctx->Eval.Map2Vertex3) |
set_active_eval2( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 ); |
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exec->eval.recalculate_maps = 0; |
} |
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void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u) |
{ |
GLuint attr; |
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for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) { |
struct gl_1d_map *map = exec->eval.map1[attr].map; |
if (map) { |
GLfloat uu = (u - map->u1) * map->du; |
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, |
exec->eval.map1[attr].sz, |
map->Order); |
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COPY_SZ_4V( exec->vtx.attrptr[attr], |
exec->vtx.attrsz[attr], |
data ); |
} |
} |
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/** Vertex -- EvalCoord1f is a noop if this map not enabled: |
**/ |
if (exec->eval.map1[0].map) { |
struct gl_1d_map *map = exec->eval.map1[0].map; |
GLfloat uu = (u - map->u1) * map->du; |
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, |
exec->eval.map1[0].sz, |
map->Order); |
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if (exec->eval.map1[0].sz == 4) |
CALL_Vertex4fv(GET_DISPATCH(), ( vertex )); |
else |
CALL_Vertex3fv(GET_DISPATCH(), ( vertex )); |
} |
} |
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void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec, |
GLfloat u, GLfloat v ) |
{ |
GLuint attr; |
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for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) { |
struct gl_2d_map *map = exec->eval.map2[attr].map; |
if (map) { |
GLfloat uu = (u - map->u1) * map->du; |
GLfloat vv = (v - map->v1) * map->dv; |
GLfloat data[4]; |
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ASSIGN_4V(data, 0, 0, 0, 1); |
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_math_horner_bezier_surf(map->Points, |
data, |
uu, vv, |
exec->eval.map2[attr].sz, |
map->Uorder, map->Vorder); |
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COPY_SZ_4V( exec->vtx.attrptr[attr], |
exec->vtx.attrsz[attr], |
data ); |
} |
} |
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/** Vertex -- EvalCoord2f is a noop if this map not enabled: |
**/ |
if (exec->eval.map2[0].map) { |
struct gl_2d_map *map = exec->eval.map2[0].map; |
GLfloat uu = (u - map->u1) * map->du; |
GLfloat vv = (v - map->v1) * map->dv; |
GLfloat vertex[4]; |
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ASSIGN_4V(vertex, 0, 0, 0, 1); |
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if (exec->ctx->Eval.AutoNormal) { |
GLfloat normal[4]; |
GLfloat du[4], dv[4]; |
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_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, |
exec->eval.map2[0].sz, |
map->Uorder, map->Vorder); |
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if (exec->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]; |
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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]; |
} |
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CROSS3(normal, du, dv); |
NORMALIZE_3FV(normal); |
normal[3] = 1.0; |
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COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL], |
exec->vtx.attrsz[VBO_ATTRIB_NORMAL], |
normal ); |
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} |
else { |
_math_horner_bezier_surf(map->Points, vertex, uu, vv, |
exec->eval.map2[0].sz, |
map->Uorder, map->Vorder); |
} |
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if (exec->vtx.attrsz[0] == 4) |
CALL_Vertex4fv(GET_DISPATCH(), ( vertex )); |
else |
CALL_Vertex3fv(GET_DISPATCH(), ( vertex )); |
} |
} |
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