Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | /* $Id: light.c,v 1.1 2003-02-28 11:42:03 pj Exp $ */ |
| 2 | |||
| 3 | /* |
||
| 4 | * Mesa 3-D graphics library |
||
| 5 | * Version: 4.1 |
||
| 6 | * |
||
| 7 | * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. |
||
| 8 | * |
||
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 10 | * copy of this software and associated documentation files (the "Software"), |
||
| 11 | * to deal in the Software without restriction, including without limitation |
||
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 14 | * Software is furnished to do so, subject to the following conditions: |
||
| 15 | * |
||
| 16 | * The above copyright notice and this permission notice shall be included |
||
| 17 | * in all copies or substantial portions of the Software. |
||
| 18 | * |
||
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
||
| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
||
| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
||
| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
||
| 25 | */ |
||
| 26 | |||
| 27 | |||
| 28 | #include "glheader.h" |
||
| 29 | #include "imports.h" |
||
| 30 | #include "colormac.h" |
||
| 31 | #include "context.h" |
||
| 32 | #include "enums.h" |
||
| 33 | #include "light.h" |
||
| 34 | #include "macros.h" |
||
| 35 | #include "mmath.h" |
||
| 36 | #include "simple_list.h" |
||
| 37 | #include "mtypes.h" |
||
| 38 | #include "math/m_xform.h" |
||
| 39 | #include "math/m_matrix.h" |
||
| 40 | |||
| 41 | |||
| 42 | /* XXX this is a bit of a hack needed for compilation within XFree86 */ |
||
| 43 | #ifndef FLT_MIN |
||
| 44 | #define FLT_MIN 1e-37 |
||
| 45 | #endif |
||
| 46 | |||
| 47 | |||
| 48 | void |
||
| 49 | _mesa_ShadeModel( GLenum mode ) |
||
| 50 | { |
||
| 51 | GET_CURRENT_CONTEXT(ctx); |
||
| 52 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 53 | |||
| 54 | if (MESA_VERBOSE & VERBOSE_API) |
||
| 55 | _mesa_debug(ctx, "glShadeModel %s\n", _mesa_lookup_enum_by_nr(mode)); |
||
| 56 | |||
| 57 | if (mode != GL_FLAT && mode != GL_SMOOTH) { |
||
| 58 | _mesa_error( ctx, GL_INVALID_ENUM, "glShadeModel" ); |
||
| 59 | return; |
||
| 60 | } |
||
| 61 | |||
| 62 | if (ctx->Light.ShadeModel == mode) |
||
| 63 | return; |
||
| 64 | |||
| 65 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 66 | ctx->Light.ShadeModel = mode; |
||
| 67 | ctx->_TriangleCaps ^= DD_FLATSHADE; |
||
| 68 | if (ctx->Driver.ShadeModel) |
||
| 69 | (*ctx->Driver.ShadeModel)( ctx, mode ); |
||
| 70 | } |
||
| 71 | |||
| 72 | |||
| 73 | |||
| 74 | void |
||
| 75 | _mesa_Lightf( GLenum light, GLenum pname, GLfloat param ) |
||
| 76 | { |
||
| 77 | _mesa_Lightfv( light, pname, ¶m ); |
||
| 78 | } |
||
| 79 | |||
| 80 | |||
| 81 | void |
||
| 82 | _mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params ) |
||
| 83 | { |
||
| 84 | GET_CURRENT_CONTEXT(ctx); |
||
| 85 | GLint i = (GLint) (light - GL_LIGHT0); |
||
| 86 | struct gl_light *l = &ctx->Light.Light[i]; |
||
| 87 | |||
| 88 | if (i < 0 || i >= (GLint) ctx->Const.MaxLights) { |
||
| 89 | _mesa_error( ctx, GL_INVALID_ENUM, "glLight(light=0x%x)", light ); |
||
| 90 | return; |
||
| 91 | } |
||
| 92 | |||
| 93 | switch (pname) { |
||
| 94 | case GL_AMBIENT: |
||
| 95 | if (TEST_EQ_4V(l->Ambient, params)) |
||
| 96 | return; |
||
| 97 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 98 | COPY_4V( l->Ambient, params ); |
||
| 99 | break; |
||
| 100 | case GL_DIFFUSE: |
||
| 101 | if (TEST_EQ_4V(l->Diffuse, params)) |
||
| 102 | return; |
||
| 103 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 104 | COPY_4V( l->Diffuse, params ); |
||
| 105 | break; |
||
| 106 | case GL_SPECULAR: |
||
| 107 | if (TEST_EQ_4V(l->Specular, params)) |
||
| 108 | return; |
||
| 109 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 110 | COPY_4V( l->Specular, params ); |
||
| 111 | break; |
||
| 112 | case GL_POSITION: { |
||
| 113 | GLfloat tmp[4]; |
||
| 114 | /* transform position by ModelView matrix */ |
||
| 115 | TRANSFORM_POINT( tmp, ctx->ModelviewMatrixStack.Top->m, params ); |
||
| 116 | if (TEST_EQ_4V(l->EyePosition, tmp)) |
||
| 117 | return; |
||
| 118 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 119 | COPY_4V(l->EyePosition, tmp); |
||
| 120 | if (l->EyePosition[3] != 0.0F) |
||
| 121 | l->_Flags |= LIGHT_POSITIONAL; |
||
| 122 | else |
||
| 123 | l->_Flags &= ~LIGHT_POSITIONAL; |
||
| 124 | break; |
||
| 125 | } |
||
| 126 | case GL_SPOT_DIRECTION: { |
||
| 127 | GLfloat tmp[4]; |
||
| 128 | /* transform direction by inverse modelview */ |
||
| 129 | if (ctx->ModelviewMatrixStack.Top->flags & MAT_DIRTY_INVERSE) { |
||
| 130 | _math_matrix_analyse( ctx->ModelviewMatrixStack.Top ); |
||
| 131 | } |
||
| 132 | TRANSFORM_NORMAL( tmp, params, ctx->ModelviewMatrixStack.Top->inv ); |
||
| 133 | if (TEST_EQ_3V(l->EyeDirection, tmp)) |
||
| 134 | return; |
||
| 135 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 136 | COPY_3V(l->EyeDirection, tmp); |
||
| 137 | break; |
||
| 138 | } |
||
| 139 | case GL_SPOT_EXPONENT: |
||
| 140 | if (params[0]<0.0 || params[0]>128.0) { |
||
| 141 | _mesa_error( ctx, GL_INVALID_VALUE, "glLight" ); |
||
| 142 | return; |
||
| 143 | } |
||
| 144 | if (l->SpotExponent == params[0]) |
||
| 145 | return; |
||
| 146 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 147 | l->SpotExponent = params[0]; |
||
| 148 | _mesa_invalidate_spot_exp_table( l ); |
||
| 149 | break; |
||
| 150 | case GL_SPOT_CUTOFF: |
||
| 151 | if ((params[0]<0.0 || params[0]>90.0) && params[0]!=180.0) { |
||
| 152 | _mesa_error( ctx, GL_INVALID_VALUE, "glLight" ); |
||
| 153 | return; |
||
| 154 | } |
||
| 155 | if (l->SpotCutoff == params[0]) |
||
| 156 | return; |
||
| 157 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 158 | l->SpotCutoff = params[0]; |
||
| 159 | l->_CosCutoff = (GLfloat) _mesa_cos(params[0]*DEG2RAD); |
||
| 160 | if (l->_CosCutoff < 0) |
||
| 161 | l->_CosCutoff = 0; |
||
| 162 | if (l->SpotCutoff != 180.0F) |
||
| 163 | l->_Flags |= LIGHT_SPOT; |
||
| 164 | else |
||
| 165 | l->_Flags &= ~LIGHT_SPOT; |
||
| 166 | break; |
||
| 167 | case GL_CONSTANT_ATTENUATION: |
||
| 168 | if (params[0]<0.0) { |
||
| 169 | _mesa_error( ctx, GL_INVALID_VALUE, "glLight" ); |
||
| 170 | return; |
||
| 171 | } |
||
| 172 | if (l->ConstantAttenuation == params[0]) |
||
| 173 | return; |
||
| 174 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 175 | l->ConstantAttenuation = params[0]; |
||
| 176 | break; |
||
| 177 | case GL_LINEAR_ATTENUATION: |
||
| 178 | if (params[0]<0.0) { |
||
| 179 | _mesa_error( ctx, GL_INVALID_VALUE, "glLight" ); |
||
| 180 | return; |
||
| 181 | } |
||
| 182 | if (l->LinearAttenuation == params[0]) |
||
| 183 | return; |
||
| 184 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 185 | l->LinearAttenuation = params[0]; |
||
| 186 | break; |
||
| 187 | case GL_QUADRATIC_ATTENUATION: |
||
| 188 | if (params[0]<0.0) { |
||
| 189 | _mesa_error( ctx, GL_INVALID_VALUE, "glLight" ); |
||
| 190 | return; |
||
| 191 | } |
||
| 192 | if (l->QuadraticAttenuation == params[0]) |
||
| 193 | return; |
||
| 194 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 195 | l->QuadraticAttenuation = params[0]; |
||
| 196 | break; |
||
| 197 | default: |
||
| 198 | _mesa_error( ctx, GL_INVALID_ENUM, "glLight(pname=0x%x)", pname ); |
||
| 199 | return; |
||
| 200 | } |
||
| 201 | |||
| 202 | if (ctx->Driver.Lightfv) |
||
| 203 | ctx->Driver.Lightfv( ctx, light, pname, params ); |
||
| 204 | } |
||
| 205 | |||
| 206 | |||
| 207 | void |
||
| 208 | _mesa_Lighti( GLenum light, GLenum pname, GLint param ) |
||
| 209 | { |
||
| 210 | _mesa_Lightiv( light, pname, ¶m ); |
||
| 211 | } |
||
| 212 | |||
| 213 | |||
| 214 | void |
||
| 215 | _mesa_Lightiv( GLenum light, GLenum pname, const GLint *params ) |
||
| 216 | { |
||
| 217 | GLfloat fparam[4]; |
||
| 218 | |||
| 219 | switch (pname) { |
||
| 220 | case GL_AMBIENT: |
||
| 221 | case GL_DIFFUSE: |
||
| 222 | case GL_SPECULAR: |
||
| 223 | fparam[0] = INT_TO_FLOAT( params[0] ); |
||
| 224 | fparam[1] = INT_TO_FLOAT( params[1] ); |
||
| 225 | fparam[2] = INT_TO_FLOAT( params[2] ); |
||
| 226 | fparam[3] = INT_TO_FLOAT( params[3] ); |
||
| 227 | break; |
||
| 228 | case GL_POSITION: |
||
| 229 | fparam[0] = (GLfloat) params[0]; |
||
| 230 | fparam[1] = (GLfloat) params[1]; |
||
| 231 | fparam[2] = (GLfloat) params[2]; |
||
| 232 | fparam[3] = (GLfloat) params[3]; |
||
| 233 | break; |
||
| 234 | case GL_SPOT_DIRECTION: |
||
| 235 | fparam[0] = (GLfloat) params[0]; |
||
| 236 | fparam[1] = (GLfloat) params[1]; |
||
| 237 | fparam[2] = (GLfloat) params[2]; |
||
| 238 | break; |
||
| 239 | case GL_SPOT_EXPONENT: |
||
| 240 | case GL_SPOT_CUTOFF: |
||
| 241 | case GL_CONSTANT_ATTENUATION: |
||
| 242 | case GL_LINEAR_ATTENUATION: |
||
| 243 | case GL_QUADRATIC_ATTENUATION: |
||
| 244 | fparam[0] = (GLfloat) params[0]; |
||
| 245 | break; |
||
| 246 | default: |
||
| 247 | /* error will be caught later in gl_Lightfv */ |
||
| 248 | ; |
||
| 249 | } |
||
| 250 | |||
| 251 | _mesa_Lightfv( light, pname, fparam ); |
||
| 252 | } |
||
| 253 | |||
| 254 | |||
| 255 | |||
| 256 | void |
||
| 257 | _mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params ) |
||
| 258 | { |
||
| 259 | GET_CURRENT_CONTEXT(ctx); |
||
| 260 | GLint l = (GLint) (light - GL_LIGHT0); |
||
| 261 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 262 | |||
| 263 | if (l < 0 || l >= (GLint) ctx->Const.MaxLights) { |
||
| 264 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightfv" ); |
||
| 265 | return; |
||
| 266 | } |
||
| 267 | |||
| 268 | switch (pname) { |
||
| 269 | case GL_AMBIENT: |
||
| 270 | COPY_4V( params, ctx->Light.Light[l].Ambient ); |
||
| 271 | break; |
||
| 272 | case GL_DIFFUSE: |
||
| 273 | COPY_4V( params, ctx->Light.Light[l].Diffuse ); |
||
| 274 | break; |
||
| 275 | case GL_SPECULAR: |
||
| 276 | COPY_4V( params, ctx->Light.Light[l].Specular ); |
||
| 277 | break; |
||
| 278 | case GL_POSITION: |
||
| 279 | COPY_4V( params, ctx->Light.Light[l].EyePosition ); |
||
| 280 | break; |
||
| 281 | case GL_SPOT_DIRECTION: |
||
| 282 | COPY_3V( params, ctx->Light.Light[l].EyeDirection ); |
||
| 283 | break; |
||
| 284 | case GL_SPOT_EXPONENT: |
||
| 285 | params[0] = ctx->Light.Light[l].SpotExponent; |
||
| 286 | break; |
||
| 287 | case GL_SPOT_CUTOFF: |
||
| 288 | params[0] = ctx->Light.Light[l].SpotCutoff; |
||
| 289 | break; |
||
| 290 | case GL_CONSTANT_ATTENUATION: |
||
| 291 | params[0] = ctx->Light.Light[l].ConstantAttenuation; |
||
| 292 | break; |
||
| 293 | case GL_LINEAR_ATTENUATION: |
||
| 294 | params[0] = ctx->Light.Light[l].LinearAttenuation; |
||
| 295 | break; |
||
| 296 | case GL_QUADRATIC_ATTENUATION: |
||
| 297 | params[0] = ctx->Light.Light[l].QuadraticAttenuation; |
||
| 298 | break; |
||
| 299 | default: |
||
| 300 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightfv" ); |
||
| 301 | break; |
||
| 302 | } |
||
| 303 | } |
||
| 304 | |||
| 305 | |||
| 306 | |||
| 307 | void |
||
| 308 | _mesa_GetLightiv( GLenum light, GLenum pname, GLint *params ) |
||
| 309 | { |
||
| 310 | GET_CURRENT_CONTEXT(ctx); |
||
| 311 | GLint l = (GLint) (light - GL_LIGHT0); |
||
| 312 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 313 | |||
| 314 | if (l < 0 || l >= (GLint) ctx->Const.MaxLights) { |
||
| 315 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightiv" ); |
||
| 316 | return; |
||
| 317 | } |
||
| 318 | |||
| 319 | switch (pname) { |
||
| 320 | case GL_AMBIENT: |
||
| 321 | params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[0]); |
||
| 322 | params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[1]); |
||
| 323 | params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[2]); |
||
| 324 | params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Ambient[3]); |
||
| 325 | break; |
||
| 326 | case GL_DIFFUSE: |
||
| 327 | params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[0]); |
||
| 328 | params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[1]); |
||
| 329 | params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[2]); |
||
| 330 | params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Diffuse[3]); |
||
| 331 | break; |
||
| 332 | case GL_SPECULAR: |
||
| 333 | params[0] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[0]); |
||
| 334 | params[1] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[1]); |
||
| 335 | params[2] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[2]); |
||
| 336 | params[3] = FLOAT_TO_INT(ctx->Light.Light[l].Specular[3]); |
||
| 337 | break; |
||
| 338 | case GL_POSITION: |
||
| 339 | params[0] = (GLint) ctx->Light.Light[l].EyePosition[0]; |
||
| 340 | params[1] = (GLint) ctx->Light.Light[l].EyePosition[1]; |
||
| 341 | params[2] = (GLint) ctx->Light.Light[l].EyePosition[2]; |
||
| 342 | params[3] = (GLint) ctx->Light.Light[l].EyePosition[3]; |
||
| 343 | break; |
||
| 344 | case GL_SPOT_DIRECTION: |
||
| 345 | params[0] = (GLint) ctx->Light.Light[l].EyeDirection[0]; |
||
| 346 | params[1] = (GLint) ctx->Light.Light[l].EyeDirection[1]; |
||
| 347 | params[2] = (GLint) ctx->Light.Light[l].EyeDirection[2]; |
||
| 348 | break; |
||
| 349 | case GL_SPOT_EXPONENT: |
||
| 350 | params[0] = (GLint) ctx->Light.Light[l].SpotExponent; |
||
| 351 | break; |
||
| 352 | case GL_SPOT_CUTOFF: |
||
| 353 | params[0] = (GLint) ctx->Light.Light[l].SpotCutoff; |
||
| 354 | break; |
||
| 355 | case GL_CONSTANT_ATTENUATION: |
||
| 356 | params[0] = (GLint) ctx->Light.Light[l].ConstantAttenuation; |
||
| 357 | break; |
||
| 358 | case GL_LINEAR_ATTENUATION: |
||
| 359 | params[0] = (GLint) ctx->Light.Light[l].LinearAttenuation; |
||
| 360 | break; |
||
| 361 | case GL_QUADRATIC_ATTENUATION: |
||
| 362 | params[0] = (GLint) ctx->Light.Light[l].QuadraticAttenuation; |
||
| 363 | break; |
||
| 364 | default: |
||
| 365 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetLightiv" ); |
||
| 366 | break; |
||
| 367 | } |
||
| 368 | } |
||
| 369 | |||
| 370 | |||
| 371 | |||
| 372 | /**********************************************************************/ |
||
| 373 | /*** Light Model ***/ |
||
| 374 | /**********************************************************************/ |
||
| 375 | |||
| 376 | |||
| 377 | void |
||
| 378 | _mesa_LightModelfv( GLenum pname, const GLfloat *params ) |
||
| 379 | { |
||
| 380 | GLenum newenum; |
||
| 381 | GLboolean newbool; |
||
| 382 | GET_CURRENT_CONTEXT(ctx); |
||
| 383 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 384 | |||
| 385 | switch (pname) { |
||
| 386 | case GL_LIGHT_MODEL_AMBIENT: |
||
| 387 | if (TEST_EQ_4V( ctx->Light.Model.Ambient, params )) |
||
| 388 | return; |
||
| 389 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 390 | COPY_4V( ctx->Light.Model.Ambient, params ); |
||
| 391 | break; |
||
| 392 | case GL_LIGHT_MODEL_LOCAL_VIEWER: |
||
| 393 | newbool = (params[0]!=0.0); |
||
| 394 | if (ctx->Light.Model.LocalViewer == newbool) |
||
| 395 | return; |
||
| 396 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 397 | ctx->Light.Model.LocalViewer = newbool; |
||
| 398 | break; |
||
| 399 | case GL_LIGHT_MODEL_TWO_SIDE: |
||
| 400 | newbool = (params[0]!=0.0); |
||
| 401 | if (ctx->Light.Model.TwoSide == newbool) |
||
| 402 | return; |
||
| 403 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 404 | ctx->Light.Model.TwoSide = newbool; |
||
| 405 | |||
| 406 | if (ctx->Light.Enabled && ctx->Light.Model.TwoSide) |
||
| 407 | ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE; |
||
| 408 | else |
||
| 409 | ctx->_TriangleCaps &= ~DD_TRI_LIGHT_TWOSIDE; |
||
| 410 | break; |
||
| 411 | case GL_LIGHT_MODEL_COLOR_CONTROL: |
||
| 412 | if (params[0] == (GLfloat) GL_SINGLE_COLOR) |
||
| 413 | newenum = GL_SINGLE_COLOR; |
||
| 414 | else if (params[0] == (GLfloat) GL_SEPARATE_SPECULAR_COLOR) |
||
| 415 | newenum = GL_SEPARATE_SPECULAR_COLOR; |
||
| 416 | else { |
||
| 417 | _mesa_error( ctx, GL_INVALID_ENUM, "glLightModel(param=0x0%x)", |
||
| 418 | (GLint) params[0] ); |
||
| 419 | return; |
||
| 420 | } |
||
| 421 | if (ctx->Light.Model.ColorControl == newenum) |
||
| 422 | return; |
||
| 423 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 424 | ctx->Light.Model.ColorControl = newenum; |
||
| 425 | |||
| 426 | if ((ctx->Light.Enabled && |
||
| 427 | ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) |
||
| 428 | || ctx->Fog.ColorSumEnabled) |
||
| 429 | ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR; |
||
| 430 | else |
||
| 431 | ctx->_TriangleCaps &= ~DD_SEPARATE_SPECULAR; |
||
| 432 | |||
| 433 | break; |
||
| 434 | default: |
||
| 435 | _mesa_error( ctx, GL_INVALID_ENUM, "glLightModel(pname=0x%x)", pname ); |
||
| 436 | break; |
||
| 437 | } |
||
| 438 | |||
| 439 | if (ctx->Driver.LightModelfv) |
||
| 440 | ctx->Driver.LightModelfv( ctx, pname, params ); |
||
| 441 | } |
||
| 442 | |||
| 443 | |||
| 444 | void |
||
| 445 | _mesa_LightModeliv( GLenum pname, const GLint *params ) |
||
| 446 | { |
||
| 447 | GLfloat fparam[4]; |
||
| 448 | |||
| 449 | switch (pname) { |
||
| 450 | case GL_LIGHT_MODEL_AMBIENT: |
||
| 451 | fparam[0] = INT_TO_FLOAT( params[0] ); |
||
| 452 | fparam[1] = INT_TO_FLOAT( params[1] ); |
||
| 453 | fparam[2] = INT_TO_FLOAT( params[2] ); |
||
| 454 | fparam[3] = INT_TO_FLOAT( params[3] ); |
||
| 455 | break; |
||
| 456 | case GL_LIGHT_MODEL_LOCAL_VIEWER: |
||
| 457 | case GL_LIGHT_MODEL_TWO_SIDE: |
||
| 458 | case GL_LIGHT_MODEL_COLOR_CONTROL: |
||
| 459 | fparam[0] = (GLfloat) params[0]; |
||
| 460 | break; |
||
| 461 | default: |
||
| 462 | /* Error will be caught later in gl_LightModelfv */ |
||
| 463 | ; |
||
| 464 | } |
||
| 465 | _mesa_LightModelfv( pname, fparam ); |
||
| 466 | } |
||
| 467 | |||
| 468 | |||
| 469 | void |
||
| 470 | _mesa_LightModeli( GLenum pname, GLint param ) |
||
| 471 | { |
||
| 472 | _mesa_LightModeliv( pname, ¶m ); |
||
| 473 | } |
||
| 474 | |||
| 475 | |||
| 476 | void |
||
| 477 | _mesa_LightModelf( GLenum pname, GLfloat param ) |
||
| 478 | { |
||
| 479 | _mesa_LightModelfv( pname, ¶m ); |
||
| 480 | } |
||
| 481 | |||
| 482 | |||
| 483 | |||
| 484 | /********** MATERIAL **********/ |
||
| 485 | |||
| 486 | |||
| 487 | /* |
||
| 488 | * Given a face and pname value (ala glColorMaterial), compute a bitmask |
||
| 489 | * of the targeted material values. |
||
| 490 | */ |
||
| 491 | GLuint |
||
| 492 | _mesa_material_bitmask( GLcontext *ctx, GLenum face, GLenum pname, |
||
| 493 | GLuint legal, const char *where ) |
||
| 494 | { |
||
| 495 | GLuint bitmask = 0; |
||
| 496 | |||
| 497 | /* Make a bitmask indicating what material attribute(s) we're updating */ |
||
| 498 | switch (pname) { |
||
| 499 | case GL_EMISSION: |
||
| 500 | bitmask |= FRONT_EMISSION_BIT | BACK_EMISSION_BIT; |
||
| 501 | break; |
||
| 502 | case GL_AMBIENT: |
||
| 503 | bitmask |= FRONT_AMBIENT_BIT | BACK_AMBIENT_BIT; |
||
| 504 | break; |
||
| 505 | case GL_DIFFUSE: |
||
| 506 | bitmask |= FRONT_DIFFUSE_BIT | BACK_DIFFUSE_BIT; |
||
| 507 | break; |
||
| 508 | case GL_SPECULAR: |
||
| 509 | bitmask |= FRONT_SPECULAR_BIT | BACK_SPECULAR_BIT; |
||
| 510 | break; |
||
| 511 | case GL_SHININESS: |
||
| 512 | bitmask |= FRONT_SHININESS_BIT | BACK_SHININESS_BIT; |
||
| 513 | break; |
||
| 514 | case GL_AMBIENT_AND_DIFFUSE: |
||
| 515 | bitmask |= FRONT_AMBIENT_BIT | BACK_AMBIENT_BIT; |
||
| 516 | bitmask |= FRONT_DIFFUSE_BIT | BACK_DIFFUSE_BIT; |
||
| 517 | break; |
||
| 518 | case GL_COLOR_INDEXES: |
||
| 519 | bitmask |= FRONT_INDEXES_BIT | BACK_INDEXES_BIT; |
||
| 520 | break; |
||
| 521 | default: |
||
| 522 | _mesa_error( ctx, GL_INVALID_ENUM, where ); |
||
| 523 | return 0; |
||
| 524 | } |
||
| 525 | |||
| 526 | if (face==GL_FRONT) { |
||
| 527 | bitmask &= FRONT_MATERIAL_BITS; |
||
| 528 | } |
||
| 529 | else if (face==GL_BACK) { |
||
| 530 | bitmask &= BACK_MATERIAL_BITS; |
||
| 531 | } |
||
| 532 | else if (face != GL_FRONT_AND_BACK) { |
||
| 533 | _mesa_error( ctx, GL_INVALID_ENUM, where ); |
||
| 534 | return 0; |
||
| 535 | } |
||
| 536 | |||
| 537 | if (bitmask & ~legal) { |
||
| 538 | _mesa_error( ctx, GL_INVALID_ENUM, where ); |
||
| 539 | return 0; |
||
| 540 | } |
||
| 541 | |||
| 542 | return bitmask; |
||
| 543 | } |
||
| 544 | |||
| 545 | |||
| 546 | /* Perform a straight copy between pairs of materials. |
||
| 547 | */ |
||
| 548 | void _mesa_copy_material_pairs( struct gl_material dst[2], |
||
| 549 | const struct gl_material src[2], |
||
| 550 | GLuint bitmask ) |
||
| 551 | { |
||
| 552 | if (bitmask & FRONT_EMISSION_BIT) { |
||
| 553 | COPY_4FV( dst[0].Emission, src[0].Emission ); |
||
| 554 | } |
||
| 555 | if (bitmask & BACK_EMISSION_BIT) { |
||
| 556 | COPY_4FV( dst[1].Emission, src[1].Emission ); |
||
| 557 | } |
||
| 558 | if (bitmask & FRONT_AMBIENT_BIT) { |
||
| 559 | COPY_4FV( dst[0].Ambient, src[0].Ambient ); |
||
| 560 | } |
||
| 561 | if (bitmask & BACK_AMBIENT_BIT) { |
||
| 562 | COPY_4FV( dst[1].Ambient, src[1].Ambient ); |
||
| 563 | } |
||
| 564 | if (bitmask & FRONT_DIFFUSE_BIT) { |
||
| 565 | COPY_4FV( dst[0].Diffuse, src[0].Diffuse ); |
||
| 566 | } |
||
| 567 | if (bitmask & BACK_DIFFUSE_BIT) { |
||
| 568 | COPY_4FV( dst[1].Diffuse, src[1].Diffuse ); |
||
| 569 | } |
||
| 570 | if (bitmask & FRONT_SPECULAR_BIT) { |
||
| 571 | COPY_4FV( dst[0].Specular, src[0].Specular ); |
||
| 572 | } |
||
| 573 | if (bitmask & BACK_SPECULAR_BIT) { |
||
| 574 | COPY_4FV( dst[1].Specular, src[1].Specular ); |
||
| 575 | } |
||
| 576 | if (bitmask & FRONT_SHININESS_BIT) { |
||
| 577 | dst[0].Shininess = src[0].Shininess; |
||
| 578 | } |
||
| 579 | if (bitmask & BACK_SHININESS_BIT) { |
||
| 580 | dst[1].Shininess = src[1].Shininess; |
||
| 581 | } |
||
| 582 | if (bitmask & FRONT_INDEXES_BIT) { |
||
| 583 | dst[0].AmbientIndex = src[0].AmbientIndex; |
||
| 584 | dst[0].DiffuseIndex = src[0].DiffuseIndex; |
||
| 585 | dst[0].SpecularIndex = src[0].SpecularIndex; |
||
| 586 | } |
||
| 587 | if (bitmask & BACK_INDEXES_BIT) { |
||
| 588 | dst[1].AmbientIndex = src[1].AmbientIndex; |
||
| 589 | dst[1].DiffuseIndex = src[1].DiffuseIndex; |
||
| 590 | dst[1].SpecularIndex = src[1].SpecularIndex; |
||
| 591 | } |
||
| 592 | } |
||
| 593 | |||
| 594 | |||
| 595 | /* |
||
| 596 | * Check if the global material has to be updated with info that was |
||
| 597 | * associated with a vertex via glMaterial. |
||
| 598 | * This function is used when any material values get changed between |
||
| 599 | * glBegin/glEnd either by calling glMaterial() or by calling glColor() |
||
| 600 | * when GL_COLOR_MATERIAL is enabled. |
||
| 601 | * |
||
| 602 | * src[0] is front material, src[1] is back material |
||
| 603 | * |
||
| 604 | * Additionally keeps the precomputed lighting state uptodate. |
||
| 605 | */ |
||
| 606 | void _mesa_update_material( GLcontext *ctx, |
||
| 607 | const struct gl_material src[2], |
||
| 608 | GLuint bitmask ) |
||
| 609 | { |
||
| 610 | struct gl_light *light, *list = &ctx->Light.EnabledList; |
||
| 611 | |||
| 612 | if (ctx->Light.ColorMaterialEnabled) |
||
| 613 | bitmask &= ~ctx->Light.ColorMaterialBitmask; |
||
| 614 | |||
| 615 | if (MESA_VERBOSE&VERBOSE_IMMEDIATE) |
||
| 616 | _mesa_debug(ctx, "_mesa_update_material, mask 0x%x\n", bitmask); |
||
| 617 | |||
| 618 | if (!bitmask) |
||
| 619 | return; |
||
| 620 | |||
| 621 | /* update material emission */ |
||
| 622 | if (bitmask & FRONT_EMISSION_BIT) { |
||
| 623 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 624 | COPY_4FV( mat->Emission, src[0].Emission ); |
||
| 625 | } |
||
| 626 | if (bitmask & BACK_EMISSION_BIT) { |
||
| 627 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 628 | COPY_4FV( mat->Emission, src[1].Emission ); |
||
| 629 | } |
||
| 630 | |||
| 631 | /* update material ambience */ |
||
| 632 | if (bitmask & FRONT_AMBIENT_BIT) { |
||
| 633 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 634 | COPY_4FV( mat->Ambient, src[0].Ambient ); |
||
| 635 | foreach (light, list) { |
||
| 636 | SCALE_3V( light->_MatAmbient[0], light->Ambient, src[0].Ambient); |
||
| 637 | } |
||
| 638 | } |
||
| 639 | if (bitmask & BACK_AMBIENT_BIT) { |
||
| 640 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 641 | COPY_4FV( mat->Ambient, src[1].Ambient ); |
||
| 642 | foreach (light, list) { |
||
| 643 | SCALE_3V( light->_MatAmbient[1], light->Ambient, src[1].Ambient); |
||
| 644 | } |
||
| 645 | } |
||
| 646 | |||
| 647 | /* update BaseColor = emission + scene's ambience * material's ambience */ |
||
| 648 | if (bitmask & (FRONT_EMISSION_BIT | FRONT_AMBIENT_BIT)) { |
||
| 649 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 650 | COPY_3V( ctx->Light._BaseColor[0], mat->Emission ); |
||
| 651 | ACC_SCALE_3V( ctx->Light._BaseColor[0], mat->Ambient, |
||
| 652 | ctx->Light.Model.Ambient ); |
||
| 653 | } |
||
| 654 | if (bitmask & (BACK_EMISSION_BIT | BACK_AMBIENT_BIT)) { |
||
| 655 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 656 | COPY_3V( ctx->Light._BaseColor[1], mat->Emission ); |
||
| 657 | ACC_SCALE_3V( ctx->Light._BaseColor[1], mat->Ambient, |
||
| 658 | ctx->Light.Model.Ambient ); |
||
| 659 | } |
||
| 660 | |||
| 661 | /* update material diffuse values */ |
||
| 662 | if (bitmask & FRONT_DIFFUSE_BIT) { |
||
| 663 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 664 | COPY_4FV( mat->Diffuse, src[0].Diffuse ); |
||
| 665 | foreach (light, list) { |
||
| 666 | SCALE_3V( light->_MatDiffuse[0], light->Diffuse, mat->Diffuse ); |
||
| 667 | } |
||
| 668 | } |
||
| 669 | if (bitmask & BACK_DIFFUSE_BIT) { |
||
| 670 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 671 | COPY_4FV( mat->Diffuse, src[1].Diffuse ); |
||
| 672 | foreach (light, list) { |
||
| 673 | SCALE_3V( light->_MatDiffuse[1], light->Diffuse, mat->Diffuse ); |
||
| 674 | } |
||
| 675 | } |
||
| 676 | |||
| 677 | /* update material specular values */ |
||
| 678 | if (bitmask & FRONT_SPECULAR_BIT) { |
||
| 679 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 680 | COPY_4FV( mat->Specular, src[0].Specular ); |
||
| 681 | foreach (light, list) { |
||
| 682 | SCALE_3V( light->_MatSpecular[0], light->Specular, mat->Specular); |
||
| 683 | } |
||
| 684 | } |
||
| 685 | if (bitmask & BACK_SPECULAR_BIT) { |
||
| 686 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 687 | COPY_4FV( mat->Specular, src[1].Specular ); |
||
| 688 | foreach (light, list) { |
||
| 689 | SCALE_3V( light->_MatSpecular[1], light->Specular, mat->Specular); |
||
| 690 | } |
||
| 691 | } |
||
| 692 | |||
| 693 | if (bitmask & FRONT_SHININESS_BIT) { |
||
| 694 | ctx->Light.Material[0].Shininess = src[0].Shininess; |
||
| 695 | _mesa_invalidate_shine_table( ctx, 0 ); |
||
| 696 | } |
||
| 697 | if (bitmask & BACK_SHININESS_BIT) { |
||
| 698 | ctx->Light.Material[1].Shininess = src[1].Shininess; |
||
| 699 | _mesa_invalidate_shine_table( ctx, 1 ); |
||
| 700 | } |
||
| 701 | |||
| 702 | if (bitmask & FRONT_INDEXES_BIT) { |
||
| 703 | ctx->Light.Material[0].AmbientIndex = src[0].AmbientIndex; |
||
| 704 | ctx->Light.Material[0].DiffuseIndex = src[0].DiffuseIndex; |
||
| 705 | ctx->Light.Material[0].SpecularIndex = src[0].SpecularIndex; |
||
| 706 | } |
||
| 707 | if (bitmask & BACK_INDEXES_BIT) { |
||
| 708 | ctx->Light.Material[1].AmbientIndex = src[1].AmbientIndex; |
||
| 709 | ctx->Light.Material[1].DiffuseIndex = src[1].DiffuseIndex; |
||
| 710 | ctx->Light.Material[1].SpecularIndex = src[1].SpecularIndex; |
||
| 711 | } |
||
| 712 | |||
| 713 | if (0) { |
||
| 714 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 715 | _mesa_debug(ctx, "update_mat emission : %f %f %f\n", |
||
| 716 | mat->Emission[0], mat->Emission[1], mat->Emission[2]); |
||
| 717 | _mesa_debug(ctx, "update_mat specular : %f %f %f\n", |
||
| 718 | mat->Specular[0], mat->Specular[1], mat->Specular[2]); |
||
| 719 | _mesa_debug(ctx, "update_mat diffuse : %f %f %f\n", |
||
| 720 | mat->Diffuse[0], mat->Diffuse[1], mat->Diffuse[2]); |
||
| 721 | _mesa_debug(ctx, "update_mat ambient : %f %f %f\n", |
||
| 722 | mat->Ambient[0], mat->Ambient[1], mat->Ambient[2]); |
||
| 723 | } |
||
| 724 | } |
||
| 725 | |||
| 726 | |||
| 727 | |||
| 728 | |||
| 729 | |||
| 730 | |||
| 731 | |||
| 732 | /* |
||
| 733 | * Update the current materials from the given rgba color |
||
| 734 | * according to the bitmask in ColorMaterialBitmask, which is |
||
| 735 | * set by glColorMaterial(). |
||
| 736 | */ |
||
| 737 | void _mesa_update_color_material( GLcontext *ctx, |
||
| 738 | const GLfloat color[4] ) |
||
| 739 | { |
||
| 740 | struct gl_light *light, *list = &ctx->Light.EnabledList; |
||
| 741 | GLuint bitmask = ctx->Light.ColorMaterialBitmask; |
||
| 742 | |||
| 743 | if (MESA_VERBOSE&VERBOSE_IMMEDIATE) |
||
| 744 | _mesa_debug(ctx, "_mesa_update_color_material, mask 0x%x\n", bitmask); |
||
| 745 | |||
| 746 | /* update emissive colors */ |
||
| 747 | if (bitmask & FRONT_EMISSION_BIT) { |
||
| 748 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 749 | COPY_4FV( mat->Emission, color ); |
||
| 750 | } |
||
| 751 | |||
| 752 | if (bitmask & BACK_EMISSION_BIT) { |
||
| 753 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 754 | COPY_4FV( mat->Emission, color ); |
||
| 755 | } |
||
| 756 | |||
| 757 | /* update light->_MatAmbient = light's ambient * material's ambient */ |
||
| 758 | if (bitmask & FRONT_AMBIENT_BIT) { |
||
| 759 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 760 | foreach (light, list) { |
||
| 761 | SCALE_3V( light->_MatAmbient[0], light->Ambient, color); |
||
| 762 | } |
||
| 763 | COPY_4FV( mat->Ambient, color ); |
||
| 764 | } |
||
| 765 | |||
| 766 | if (bitmask & BACK_AMBIENT_BIT) { |
||
| 767 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 768 | foreach (light, list) { |
||
| 769 | SCALE_3V( light->_MatAmbient[1], light->Ambient, color); |
||
| 770 | } |
||
| 771 | COPY_4FV( mat->Ambient, color ); |
||
| 772 | } |
||
| 773 | |||
| 774 | /* update BaseColor = emission + scene's ambience * material's ambience */ |
||
| 775 | if (bitmask & (FRONT_EMISSION_BIT | FRONT_AMBIENT_BIT)) { |
||
| 776 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 777 | COPY_3V( ctx->Light._BaseColor[0], mat->Emission ); |
||
| 778 | ACC_SCALE_3V( ctx->Light._BaseColor[0], mat->Ambient, ctx->Light.Model.Ambient ); |
||
| 779 | } |
||
| 780 | |||
| 781 | if (bitmask & (BACK_EMISSION_BIT | BACK_AMBIENT_BIT)) { |
||
| 782 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 783 | COPY_3V( ctx->Light._BaseColor[1], mat->Emission ); |
||
| 784 | ACC_SCALE_3V( ctx->Light._BaseColor[1], mat->Ambient, ctx->Light.Model.Ambient ); |
||
| 785 | } |
||
| 786 | |||
| 787 | /* update light->_MatDiffuse = light's diffuse * material's diffuse */ |
||
| 788 | if (bitmask & FRONT_DIFFUSE_BIT) { |
||
| 789 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 790 | COPY_4FV( mat->Diffuse, color ); |
||
| 791 | foreach (light, list) { |
||
| 792 | SCALE_3V( light->_MatDiffuse[0], light->Diffuse, mat->Diffuse ); |
||
| 793 | } |
||
| 794 | } |
||
| 795 | |||
| 796 | if (bitmask & BACK_DIFFUSE_BIT) { |
||
| 797 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 798 | COPY_4FV( mat->Diffuse, color ); |
||
| 799 | foreach (light, list) { |
||
| 800 | SCALE_3V( light->_MatDiffuse[1], light->Diffuse, mat->Diffuse ); |
||
| 801 | } |
||
| 802 | } |
||
| 803 | |||
| 804 | /* update light->_MatSpecular = light's specular * material's specular */ |
||
| 805 | if (bitmask & FRONT_SPECULAR_BIT) { |
||
| 806 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 807 | COPY_4FV( mat->Specular, color ); |
||
| 808 | foreach (light, list) { |
||
| 809 | ACC_SCALE_3V( light->_MatSpecular[0], light->Specular, mat->Specular); |
||
| 810 | } |
||
| 811 | } |
||
| 812 | |||
| 813 | if (bitmask & BACK_SPECULAR_BIT) { |
||
| 814 | struct gl_material *mat = &ctx->Light.Material[1]; |
||
| 815 | COPY_4FV( mat->Specular, color ); |
||
| 816 | foreach (light, list) { |
||
| 817 | ACC_SCALE_3V( light->_MatSpecular[1], light->Specular, mat->Specular); |
||
| 818 | } |
||
| 819 | } |
||
| 820 | |||
| 821 | if (0) { |
||
| 822 | struct gl_material *mat = &ctx->Light.Material[0]; |
||
| 823 | _mesa_debug(ctx, "update_color_mat emission : %f %f %f\n", |
||
| 824 | mat->Emission[0], mat->Emission[1], mat->Emission[2]); |
||
| 825 | _mesa_debug(ctx, "update_color_mat specular : %f %f %f\n", |
||
| 826 | mat->Specular[0], mat->Specular[1], mat->Specular[2]); |
||
| 827 | _mesa_debug(ctx, "update_color_mat diffuse : %f %f %f\n", |
||
| 828 | mat->Diffuse[0], mat->Diffuse[1], mat->Diffuse[2]); |
||
| 829 | _mesa_debug(ctx, "update_color_mat ambient : %f %f %f\n", |
||
| 830 | mat->Ambient[0], mat->Ambient[1], mat->Ambient[2]); |
||
| 831 | } |
||
| 832 | } |
||
| 833 | |||
| 834 | |||
| 835 | |||
| 836 | |||
| 837 | void |
||
| 838 | _mesa_ColorMaterial( GLenum face, GLenum mode ) |
||
| 839 | { |
||
| 840 | GET_CURRENT_CONTEXT(ctx); |
||
| 841 | GLuint bitmask; |
||
| 842 | GLuint legal = (FRONT_EMISSION_BIT | BACK_EMISSION_BIT | |
||
| 843 | FRONT_SPECULAR_BIT | BACK_SPECULAR_BIT | |
||
| 844 | FRONT_DIFFUSE_BIT | BACK_DIFFUSE_BIT | |
||
| 845 | FRONT_AMBIENT_BIT | BACK_AMBIENT_BIT); |
||
| 846 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 847 | |||
| 848 | if (MESA_VERBOSE&VERBOSE_API) |
||
| 849 | _mesa_debug(ctx, "glColorMaterial %s %s\n", |
||
| 850 | _mesa_lookup_enum_by_nr(face), |
||
| 851 | _mesa_lookup_enum_by_nr(mode)); |
||
| 852 | |||
| 853 | bitmask = _mesa_material_bitmask(ctx, face, mode, legal, "glColorMaterial"); |
||
| 854 | |||
| 855 | if (ctx->Light.ColorMaterialBitmask == bitmask && |
||
| 856 | ctx->Light.ColorMaterialFace == face && |
||
| 857 | ctx->Light.ColorMaterialMode == mode) |
||
| 858 | return; |
||
| 859 | |||
| 860 | FLUSH_VERTICES(ctx, _NEW_LIGHT); |
||
| 861 | ctx->Light.ColorMaterialBitmask = bitmask; |
||
| 862 | ctx->Light.ColorMaterialFace = face; |
||
| 863 | ctx->Light.ColorMaterialMode = mode; |
||
| 864 | |||
| 865 | if (ctx->Light.ColorMaterialEnabled) { |
||
| 866 | FLUSH_CURRENT( ctx, 0 ); |
||
| 867 | _mesa_update_color_material(ctx,ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); |
||
| 868 | } |
||
| 869 | |||
| 870 | if (ctx->Driver.ColorMaterial) |
||
| 871 | (*ctx->Driver.ColorMaterial)( ctx, face, mode ); |
||
| 872 | } |
||
| 873 | |||
| 874 | |||
| 875 | |||
| 876 | |||
| 877 | |||
| 878 | void |
||
| 879 | _mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params ) |
||
| 880 | { |
||
| 881 | GET_CURRENT_CONTEXT(ctx); |
||
| 882 | GLuint f; |
||
| 883 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* update materials */ |
||
| 884 | |||
| 885 | if (face==GL_FRONT) { |
||
| 886 | f = 0; |
||
| 887 | } |
||
| 888 | else if (face==GL_BACK) { |
||
| 889 | f = 1; |
||
| 890 | } |
||
| 891 | else { |
||
| 892 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(face)" ); |
||
| 893 | return; |
||
| 894 | } |
||
| 895 | switch (pname) { |
||
| 896 | case GL_AMBIENT: |
||
| 897 | COPY_4FV( params, ctx->Light.Material[f].Ambient ); |
||
| 898 | break; |
||
| 899 | case GL_DIFFUSE: |
||
| 900 | COPY_4FV( params, ctx->Light.Material[f].Diffuse ); |
||
| 901 | break; |
||
| 902 | case GL_SPECULAR: |
||
| 903 | COPY_4FV( params, ctx->Light.Material[f].Specular ); |
||
| 904 | break; |
||
| 905 | case GL_EMISSION: |
||
| 906 | COPY_4FV( params, ctx->Light.Material[f].Emission ); |
||
| 907 | break; |
||
| 908 | case GL_SHININESS: |
||
| 909 | *params = ctx->Light.Material[f].Shininess; |
||
| 910 | break; |
||
| 911 | case GL_COLOR_INDEXES: |
||
| 912 | params[0] = ctx->Light.Material[f].AmbientIndex; |
||
| 913 | params[1] = ctx->Light.Material[f].DiffuseIndex; |
||
| 914 | params[2] = ctx->Light.Material[f].SpecularIndex; |
||
| 915 | break; |
||
| 916 | default: |
||
| 917 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" ); |
||
| 918 | } |
||
| 919 | } |
||
| 920 | |||
| 921 | |||
| 922 | |||
| 923 | void |
||
| 924 | _mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params ) |
||
| 925 | { |
||
| 926 | GET_CURRENT_CONTEXT(ctx); |
||
| 927 | GLuint f; |
||
| 928 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* update materials */ |
||
| 929 | |||
| 930 | if (face==GL_FRONT) { |
||
| 931 | f = 0; |
||
| 932 | } |
||
| 933 | else if (face==GL_BACK) { |
||
| 934 | f = 1; |
||
| 935 | } |
||
| 936 | else { |
||
| 937 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialiv(face)" ); |
||
| 938 | return; |
||
| 939 | } |
||
| 940 | switch (pname) { |
||
| 941 | case GL_AMBIENT: |
||
| 942 | params[0] = FLOAT_TO_INT( ctx->Light.Material[f].Ambient[0] ); |
||
| 943 | params[1] = FLOAT_TO_INT( ctx->Light.Material[f].Ambient[1] ); |
||
| 944 | params[2] = FLOAT_TO_INT( ctx->Light.Material[f].Ambient[2] ); |
||
| 945 | params[3] = FLOAT_TO_INT( ctx->Light.Material[f].Ambient[3] ); |
||
| 946 | break; |
||
| 947 | case GL_DIFFUSE: |
||
| 948 | params[0] = FLOAT_TO_INT( ctx->Light.Material[f].Diffuse[0] ); |
||
| 949 | params[1] = FLOAT_TO_INT( ctx->Light.Material[f].Diffuse[1] ); |
||
| 950 | params[2] = FLOAT_TO_INT( ctx->Light.Material[f].Diffuse[2] ); |
||
| 951 | params[3] = FLOAT_TO_INT( ctx->Light.Material[f].Diffuse[3] ); |
||
| 952 | break; |
||
| 953 | case GL_SPECULAR: |
||
| 954 | params[0] = FLOAT_TO_INT( ctx->Light.Material[f].Specular[0] ); |
||
| 955 | params[1] = FLOAT_TO_INT( ctx->Light.Material[f].Specular[1] ); |
||
| 956 | params[2] = FLOAT_TO_INT( ctx->Light.Material[f].Specular[2] ); |
||
| 957 | params[3] = FLOAT_TO_INT( ctx->Light.Material[f].Specular[3] ); |
||
| 958 | break; |
||
| 959 | case GL_EMISSION: |
||
| 960 | params[0] = FLOAT_TO_INT( ctx->Light.Material[f].Emission[0] ); |
||
| 961 | params[1] = FLOAT_TO_INT( ctx->Light.Material[f].Emission[1] ); |
||
| 962 | params[2] = FLOAT_TO_INT( ctx->Light.Material[f].Emission[2] ); |
||
| 963 | params[3] = FLOAT_TO_INT( ctx->Light.Material[f].Emission[3] ); |
||
| 964 | break; |
||
| 965 | case GL_SHININESS: |
||
| 966 | *params = ROUNDF( ctx->Light.Material[f].Shininess ); |
||
| 967 | break; |
||
| 968 | case GL_COLOR_INDEXES: |
||
| 969 | params[0] = ROUNDF( ctx->Light.Material[f].AmbientIndex ); |
||
| 970 | params[1] = ROUNDF( ctx->Light.Material[f].DiffuseIndex ); |
||
| 971 | params[2] = ROUNDF( ctx->Light.Material[f].SpecularIndex ); |
||
| 972 | break; |
||
| 973 | default: |
||
| 974 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetMaterialfv(pname)" ); |
||
| 975 | } |
||
| 976 | } |
||
| 977 | |||
| 978 | |||
| 979 | |||
| 980 | |||
| 981 | /**********************************************************************/ |
||
| 982 | /***** Lighting computation *****/ |
||
| 983 | /**********************************************************************/ |
||
| 984 | |||
| 985 | |||
| 986 | /* |
||
| 987 | * Notes: |
||
| 988 | * When two-sided lighting is enabled we compute the color (or index) |
||
| 989 | * for both the front and back side of the primitive. Then, when the |
||
| 990 | * orientation of the facet is later learned, we can determine which |
||
| 991 | * color (or index) to use for rendering. |
||
| 992 | * |
||
| 993 | * KW: We now know orientation in advance and only shade for |
||
| 994 | * the side or sides which are actually required. |
||
| 995 | * |
||
| 996 | * Variables: |
||
| 997 | * n = normal vector |
||
| 998 | * V = vertex position |
||
| 999 | * P = light source position |
||
| 1000 | * Pe = (0,0,0,1) |
||
| 1001 | * |
||
| 1002 | * Precomputed: |
||
| 1003 | * IF P[3]==0 THEN |
||
| 1004 | * // light at infinity |
||
| 1005 | * IF local_viewer THEN |
||
| 1006 | * _VP_inf_norm = unit vector from V to P // Precompute |
||
| 1007 | * ELSE |
||
| 1008 | * // eye at infinity |
||
| 1009 | * _h_inf_norm = Normalize( VP + <0,0,1> ) // Precompute |
||
| 1010 | * ENDIF |
||
| 1011 | * ENDIF |
||
| 1012 | * |
||
| 1013 | * Functions: |
||
| 1014 | * Normalize( v ) = normalized vector v |
||
| 1015 | * Magnitude( v ) = length of vector v |
||
| 1016 | */ |
||
| 1017 | |||
| 1018 | |||
| 1019 | |||
| 1020 | /* |
||
| 1021 | * Whenever the spotlight exponent for a light changes we must call |
||
| 1022 | * this function to recompute the exponent lookup table. |
||
| 1023 | */ |
||
| 1024 | void |
||
| 1025 | _mesa_invalidate_spot_exp_table( struct gl_light *l ) |
||
| 1026 | { |
||
| 1027 | l->_SpotExpTable[0][0] = -1; |
||
| 1028 | } |
||
| 1029 | |||
| 1030 | static void validate_spot_exp_table( struct gl_light *l ) |
||
| 1031 | { |
||
| 1032 | GLint i; |
||
| 1033 | GLdouble exponent = l->SpotExponent; |
||
| 1034 | GLdouble tmp = 0; |
||
| 1035 | GLint clamp = 0; |
||
| 1036 | |||
| 1037 | l->_SpotExpTable[0][0] = 0.0; |
||
| 1038 | |||
| 1039 | for (i = EXP_TABLE_SIZE - 1; i > 0 ;i--) { |
||
| 1040 | if (clamp == 0) { |
||
| 1041 | tmp = _mesa_pow(i / (GLdouble) (EXP_TABLE_SIZE - 1), exponent); |
||
| 1042 | if (tmp < FLT_MIN * 100.0) { |
||
| 1043 | tmp = 0.0; |
||
| 1044 | clamp = 1; |
||
| 1045 | } |
||
| 1046 | } |
||
| 1047 | l->_SpotExpTable[i][0] = (GLfloat) tmp; |
||
| 1048 | } |
||
| 1049 | for (i = 0; i < EXP_TABLE_SIZE - 1; i++) { |
||
| 1050 | l->_SpotExpTable[i][1] = (l->_SpotExpTable[i+1][0] - |
||
| 1051 | l->_SpotExpTable[i][0]); |
||
| 1052 | } |
||
| 1053 | l->_SpotExpTable[EXP_TABLE_SIZE-1][1] = 0.0; |
||
| 1054 | } |
||
| 1055 | |||
| 1056 | |||
| 1057 | |||
| 1058 | |||
| 1059 | /* Calculate a new shine table. Doing this here saves a branch in |
||
| 1060 | * lighting, and the cost of doing it early may be partially offset |
||
| 1061 | * by keeping a MRU cache of shine tables for various shine values. |
||
| 1062 | */ |
||
| 1063 | void |
||
| 1064 | _mesa_invalidate_shine_table( GLcontext *ctx, GLuint i ) |
||
| 1065 | { |
||
| 1066 | if (ctx->_ShineTable[i]) |
||
| 1067 | ctx->_ShineTable[i]->refcount--; |
||
| 1068 | ctx->_ShineTable[i] = 0; |
||
| 1069 | } |
||
| 1070 | |||
| 1071 | static void validate_shine_table( GLcontext *ctx, GLuint i, GLfloat shininess ) |
||
| 1072 | { |
||
| 1073 | struct gl_shine_tab *list = ctx->_ShineTabList; |
||
| 1074 | struct gl_shine_tab *s; |
||
| 1075 | |||
| 1076 | foreach(s, list) |
||
| 1077 | if ( s->shininess == shininess ) |
||
| 1078 | break; |
||
| 1079 | |||
| 1080 | if (s == list) { |
||
| 1081 | GLint j; |
||
| 1082 | GLfloat *m; |
||
| 1083 | |||
| 1084 | foreach(s, list) |
||
| 1085 | if (s->refcount == 0) |
||
| 1086 | break; |
||
| 1087 | |||
| 1088 | m = s->tab; |
||
| 1089 | m[0] = 0.0; |
||
| 1090 | if (shininess == 0.0) { |
||
| 1091 | for (j = 1 ; j <= SHINE_TABLE_SIZE ; j++) |
||
| 1092 | m[j] = 1.0; |
||
| 1093 | } |
||
| 1094 | else { |
||
| 1095 | for (j = 1 ; j < SHINE_TABLE_SIZE ; j++) { |
||
| 1096 | GLdouble t, x = j / (GLfloat) (SHINE_TABLE_SIZE - 1); |
||
| 1097 | if (x < 0.005) /* underflow check */ |
||
| 1098 | x = 0.005; |
||
| 1099 | t = _mesa_pow(x, shininess); |
||
| 1100 | if (t > 1e-20) |
||
| 1101 | m[j] = (GLfloat) t; |
||
| 1102 | else |
||
| 1103 | m[j] = 0.0; |
||
| 1104 | } |
||
| 1105 | m[SHINE_TABLE_SIZE] = 1.0; |
||
| 1106 | } |
||
| 1107 | |||
| 1108 | s->shininess = shininess; |
||
| 1109 | } |
||
| 1110 | |||
| 1111 | if (ctx->_ShineTable[i]) |
||
| 1112 | ctx->_ShineTable[i]->refcount--; |
||
| 1113 | |||
| 1114 | ctx->_ShineTable[i] = s; |
||
| 1115 | move_to_tail( list, s ); |
||
| 1116 | s->refcount++; |
||
| 1117 | } |
||
| 1118 | |||
| 1119 | void |
||
| 1120 | _mesa_validate_all_lighting_tables( GLcontext *ctx ) |
||
| 1121 | { |
||
| 1122 | GLint i; |
||
| 1123 | GLfloat shininess; |
||
| 1124 | |||
| 1125 | shininess = ctx->Light.Material[0].Shininess; |
||
| 1126 | if (!ctx->_ShineTable[0] || ctx->_ShineTable[0]->shininess != shininess) |
||
| 1127 | validate_shine_table( ctx, 0, shininess ); |
||
| 1128 | |||
| 1129 | shininess = ctx->Light.Material[1].Shininess; |
||
| 1130 | if (!ctx->_ShineTable[1] || ctx->_ShineTable[1]->shininess != shininess) |
||
| 1131 | validate_shine_table( ctx, 1, shininess ); |
||
| 1132 | |||
| 1133 | for (i = 0 ; i < MAX_LIGHTS ; i++) |
||
| 1134 | if (ctx->Light.Light[i]._SpotExpTable[0][0] == -1) |
||
| 1135 | validate_spot_exp_table( &ctx->Light.Light[i] ); |
||
| 1136 | } |
||
| 1137 | |||
| 1138 | |||
| 1139 | |||
| 1140 | |||
| 1141 | /* |
||
| 1142 | * Examine current lighting parameters to determine if the optimized lighting |
||
| 1143 | * function can be used. |
||
| 1144 | * Also, precompute some lighting values such as the products of light |
||
| 1145 | * source and material ambient, diffuse and specular coefficients. |
||
| 1146 | */ |
||
| 1147 | void |
||
| 1148 | _mesa_update_lighting( GLcontext *ctx ) |
||
| 1149 | { |
||
| 1150 | struct gl_light *light; |
||
| 1151 | ctx->_NeedEyeCoords &= ~NEED_EYE_LIGHT; |
||
| 1152 | ctx->_NeedNormals &= ~NEED_NORMALS_LIGHT; |
||
| 1153 | ctx->Light._Flags = 0; |
||
| 1154 | |||
| 1155 | if (!ctx->Light.Enabled) |
||
| 1156 | return; |
||
| 1157 | |||
| 1158 | ctx->_NeedNormals |= NEED_NORMALS_LIGHT; |
||
| 1159 | |||
| 1160 | foreach(light, &ctx->Light.EnabledList) { |
||
| 1161 | ctx->Light._Flags |= light->_Flags; |
||
| 1162 | } |
||
| 1163 | |||
| 1164 | ctx->Light._NeedVertices = |
||
| 1165 | ((ctx->Light._Flags & (LIGHT_POSITIONAL|LIGHT_SPOT)) || |
||
| 1166 | ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR || |
||
| 1167 | ctx->Light.Model.LocalViewer); |
||
| 1168 | |||
| 1169 | if ((ctx->Light._Flags & LIGHT_POSITIONAL) || |
||
| 1170 | ctx->Light.Model.LocalViewer) |
||
| 1171 | ctx->_NeedEyeCoords |= NEED_EYE_LIGHT; |
||
| 1172 | |||
| 1173 | |||
| 1174 | /* XXX: This test is overkill & needs to be fixed both for software and |
||
| 1175 | * hardware t&l drivers. The above should be sufficient & should |
||
| 1176 | * be tested to verify this. |
||
| 1177 | */ |
||
| 1178 | if (ctx->Light._NeedVertices) |
||
| 1179 | ctx->_NeedEyeCoords |= NEED_EYE_LIGHT; |
||
| 1180 | |||
| 1181 | |||
| 1182 | /* Precompute some shading values. Although we reference |
||
| 1183 | * Light.Material here, we can get away without flushing |
||
| 1184 | * FLUSH_UPDATE_CURRENT, as when any outstanding material changes |
||
| 1185 | * are flushed, they will update the derived state at that time. |
||
| 1186 | */ |
||
| 1187 | if (ctx->Visual.rgbMode) { |
||
| 1188 | GLuint sides = ctx->Light.Model.TwoSide ? 2 : 1; |
||
| 1189 | GLuint side; |
||
| 1190 | for (side=0; side < sides; side++) { |
||
| 1191 | struct gl_material *mat = &ctx->Light.Material[side]; |
||
| 1192 | |||
| 1193 | COPY_3V(ctx->Light._BaseColor[side], mat->Emission); |
||
| 1194 | ACC_SCALE_3V(ctx->Light._BaseColor[side], |
||
| 1195 | ctx->Light.Model.Ambient, |
||
| 1196 | mat->Ambient); |
||
| 1197 | } |
||
| 1198 | |||
| 1199 | foreach (light, &ctx->Light.EnabledList) { |
||
| 1200 | for (side=0; side< sides; side++) { |
||
| 1201 | const struct gl_material *mat = &ctx->Light.Material[side]; |
||
| 1202 | SCALE_3V( light->_MatDiffuse[side], light->Diffuse, mat->Diffuse ); |
||
| 1203 | SCALE_3V( light->_MatAmbient[side], light->Ambient, mat->Ambient ); |
||
| 1204 | SCALE_3V( light->_MatSpecular[side], light->Specular, |
||
| 1205 | mat->Specular); |
||
| 1206 | } |
||
| 1207 | } |
||
| 1208 | } |
||
| 1209 | else { |
||
| 1210 | static const GLfloat ci[3] = { .30F, .59F, .11F }; |
||
| 1211 | foreach(light, &ctx->Light.EnabledList) { |
||
| 1212 | light->_dli = DOT3(ci, light->Diffuse); |
||
| 1213 | light->_sli = DOT3(ci, light->Specular); |
||
| 1214 | } |
||
| 1215 | } |
||
| 1216 | } |
||
| 1217 | |||
| 1218 | |||
| 1219 | /* _NEW_MODELVIEW |
||
| 1220 | * _NEW_LIGHT |
||
| 1221 | * _TNL_NEW_NEED_EYE_COORDS |
||
| 1222 | * |
||
| 1223 | * Update on (_NEW_MODELVIEW | _NEW_LIGHT) when lighting is enabled. |
||
| 1224 | * Also update on lighting space changes. |
||
| 1225 | */ |
||
| 1226 | void |
||
| 1227 | _mesa_compute_light_positions( GLcontext *ctx ) |
||
| 1228 | { |
||
| 1229 | struct gl_light *light; |
||
| 1230 | static const GLfloat eye_z[3] = { 0, 0, 1 }; |
||
| 1231 | |||
| 1232 | if (!ctx->Light.Enabled) |
||
| 1233 | return; |
||
| 1234 | |||
| 1235 | if (ctx->_NeedEyeCoords) { |
||
| 1236 | COPY_3V( ctx->_EyeZDir, eye_z ); |
||
| 1237 | } |
||
| 1238 | else { |
||
| 1239 | TRANSFORM_NORMAL( ctx->_EyeZDir, eye_z, ctx->ModelviewMatrixStack.Top->m ); |
||
| 1240 | } |
||
| 1241 | |||
| 1242 | foreach (light, &ctx->Light.EnabledList) { |
||
| 1243 | |||
| 1244 | if (ctx->_NeedEyeCoords) { |
||
| 1245 | COPY_4FV( light->_Position, light->EyePosition ); |
||
| 1246 | } |
||
| 1247 | else { |
||
| 1248 | TRANSFORM_POINT( light->_Position, ctx->ModelviewMatrixStack.Top->inv, |
||
| 1249 | light->EyePosition ); |
||
| 1250 | } |
||
| 1251 | |||
| 1252 | if (!(light->_Flags & LIGHT_POSITIONAL)) { |
||
| 1253 | /* VP (VP) = Normalize( Position ) */ |
||
| 1254 | COPY_3V( light->_VP_inf_norm, light->_Position ); |
||
| 1255 | NORMALIZE_3FV( light->_VP_inf_norm ); |
||
| 1256 | |||
| 1257 | if (!ctx->Light.Model.LocalViewer) { |
||
| 1258 | /* _h_inf_norm = Normalize( V_to_P + <0,0,1> ) */ |
||
| 1259 | ADD_3V( light->_h_inf_norm, light->_VP_inf_norm, ctx->_EyeZDir); |
||
| 1260 | NORMALIZE_3FV( light->_h_inf_norm ); |
||
| 1261 | } |
||
| 1262 | light->_VP_inf_spot_attenuation = 1.0; |
||
| 1263 | } |
||
| 1264 | |||
| 1265 | if (light->_Flags & LIGHT_SPOT) { |
||
| 1266 | if (ctx->_NeedEyeCoords) { |
||
| 1267 | COPY_3V( light->_NormDirection, light->EyeDirection ); |
||
| 1268 | } |
||
| 1269 | else { |
||
| 1270 | TRANSFORM_NORMAL( light->_NormDirection, |
||
| 1271 | light->EyeDirection, |
||
| 1272 | ctx->ModelviewMatrixStack.Top->m); |
||
| 1273 | } |
||
| 1274 | |||
| 1275 | NORMALIZE_3FV( light->_NormDirection ); |
||
| 1276 | |||
| 1277 | if (!(light->_Flags & LIGHT_POSITIONAL)) { |
||
| 1278 | GLfloat PV_dot_dir = - DOT3(light->_VP_inf_norm, |
||
| 1279 | light->_NormDirection); |
||
| 1280 | |||
| 1281 | if (PV_dot_dir > light->_CosCutoff) { |
||
| 1282 | double x = PV_dot_dir * (EXP_TABLE_SIZE-1); |
||
| 1283 | int k = (int) x; |
||
| 1284 | light->_VP_inf_spot_attenuation = |
||
| 1285 | (GLfloat) (light->_SpotExpTable[k][0] + |
||
| 1286 | (x-k)*light->_SpotExpTable[k][1]); |
||
| 1287 | } |
||
| 1288 | else { |
||
| 1289 | light->_VP_inf_spot_attenuation = 0; |
||
| 1290 | } |
||
| 1291 | } |
||
| 1292 | } |
||
| 1293 | } |
||
| 1294 | } |