src/mesa/drivers/dri/nouveau/nv10_state_tnl.c

   1 /*
   2  * Copyright (C) 2009-2010 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "nouveau_driver.h"
  28 #include "nouveau_context.h"
  29 #include "nouveau_gldefs.h"
  30 #include "nouveau_util.h"
  31 #include "nouveau_class.h"
  32 #include "nv10_driver.h"
  33
  34 void
  35 nv10_emit_clip_plane(GLcontext *ctx, int emit)
  36 {
  37 }
  38
  39 static inline unsigned
  40 get_material_bitmask(unsigned m)
  41 {
  42         unsigned ret = 0;
  43
  44         if (m & MAT_BIT_FRONT_EMISSION)
  45                 ret |= NV10TCL_COLOR_MATERIAL_EMISSION;
  46         if (m & MAT_BIT_FRONT_AMBIENT)
  47                 ret |= NV10TCL_COLOR_MATERIAL_AMBIENT;
  48         if (m & MAT_BIT_FRONT_DIFFUSE)
  49                 ret |= NV10TCL_COLOR_MATERIAL_DIFFUSE;
  50         if (m & MAT_BIT_FRONT_SPECULAR)
  51                 ret |= NV10TCL_COLOR_MATERIAL_SPECULAR;
  52
  53         return ret;
  54 }
  55
  56 void
  57 nv10_emit_color_material(GLcontext *ctx, int emit)
  58 {
  59         struct nouveau_channel *chan = context_chan(ctx);
  60         struct nouveau_grobj *celsius = context_eng3d(ctx);
  61         unsigned mask = get_material_bitmask(ctx->Light.ColorMaterialBitmask);
  62
  63         BEGIN_RING(chan, celsius, NV10TCL_COLOR_MATERIAL, 1);
  64         OUT_RING(chan, ctx->Light.ColorMaterialEnabled ? mask : 0);
  65 }
  66
  67 static unsigned
  68 get_fog_mode(unsigned mode)
  69 {
  70         switch (mode) {
  71         case GL_LINEAR:
  72                 return NV10TCL_FOG_MODE_LINEAR;
  73         case GL_EXP:
  74                 return NV10TCL_FOG_MODE_EXP;
  75         case GL_EXP2:
  76                 return NV10TCL_FOG_MODE_EXP2;
  77         default:
  78                 assert(0);
  79         }
  80 }
  81
  82 static unsigned
  83 get_fog_source(unsigned source)
  84 {
  85         switch (source) {
  86         case GL_FOG_COORDINATE_EXT:
  87                 return NV10TCL_FOG_COORD_FOG;
  88         case GL_FRAGMENT_DEPTH_EXT:
  89                 return NV10TCL_FOG_COORD_DIST_ORTHOGONAL_ABS;
  90         default:
  91                 assert(0);
  92         }
  93 }
  94
  95 void
  96 nv10_get_fog_coeff(GLcontext *ctx, float k[3])
  97 {
  98         struct gl_fog_attrib *f = &ctx->Fog;
  99
 100         switch (f->Mode) {
 101         case GL_LINEAR:
 102                 k[0] = 2 + f->Start / (f->End - f->Start);
 103                 k[1] = -1 / (f->End - f->Start);
 104                 break;
 105
 106         case GL_EXP:
 107                 k[0] = 1.5;
 108                 k[1] = -0.09 * f->Density;
 109                 break;
 110
 111         case GL_EXP2:
 112                 k[0] = 1.5;
 113                 k[1] = -0.21 * f->Density;
 114                 break;
 115
 116         default:
 117                 assert(0);
 118         }
 119
 120         k[2] = 0;
 121 }
 122
 123 void
 124 nv10_emit_fog(GLcontext *ctx, int emit)
 125 {
 126         struct nouveau_context *nctx = to_nouveau_context(ctx);
 127         struct nouveau_channel *chan = context_chan(ctx);
 128         struct nouveau_grobj *celsius = context_eng3d(ctx);
 129         struct gl_fog_attrib *f = &ctx->Fog;
 130         unsigned source = nctx->fallback == HWTNL ?
 131                 f->FogCoordinateSource : GL_FOG_COORDINATE_EXT;
 132         float k[3];
 133
 134         nv10_get_fog_coeff(ctx, k);
 135
 136         BEGIN_RING(chan, celsius, NV10TCL_FOG_MODE, 4);
 137         OUT_RING(chan, get_fog_mode(f->Mode));
 138         OUT_RING(chan, get_fog_source(source));
 139         OUT_RING(chan, f->Enabled ? 1 : 0);
 140         OUT_RING(chan, pack_rgba_f(MESA_FORMAT_RGBA8888_REV, f->Color));
 141
 142         BEGIN_RING(chan, celsius, NV10TCL_FOG_EQUATION_CONSTANT, 3);
 143         OUT_RINGp(chan, k, 3);
 144
 145         context_dirty(ctx, FRAG);
 146 }
 147
 148 static inline unsigned
 149 get_light_mode(struct gl_light *l)
 150 {
 151         if (l->Enabled) {
 152                 if (l->_Flags & LIGHT_SPOT)
 153                         return NV10TCL_ENABLED_LIGHTS_0_DIRECTIONAL;
 154                 else if (l->_Flags & LIGHT_POSITIONAL)
 155                         return NV10TCL_ENABLED_LIGHTS_0_POSITIONAL;
 156                 else
 157                         return NV10TCL_ENABLED_LIGHTS_0_NONPOSITIONAL;
 158         } else {
 159                 return NV10TCL_ENABLED_LIGHTS_0_DISABLED;
 160         }
 161 }
 162
 163 void
 164 nv10_emit_light_enable(GLcontext *ctx, int emit)
 165 {
 166         struct nouveau_context *nctx = to_nouveau_context(ctx);
 167         struct nouveau_channel *chan = context_chan(ctx);
 168         struct nouveau_grobj *celsius = context_eng3d(ctx);
 169         uint32_t en_lights = 0;
 170         int i;
 171
 172         if (nctx->fallback != HWTNL) {
 173                 BEGIN_RING(chan, celsius, NV10TCL_LIGHTING_ENABLE, 1);
 174                 OUT_RING(chan, 0);
 175                 return;
 176         }
 177
 178         for (i = 0; i < MAX_LIGHTS; i++)
 179                 en_lights |= get_light_mode(&ctx->Light.Light[i]) << 2 * i;
 180
 181         BEGIN_RING(chan, celsius, NV10TCL_ENABLED_LIGHTS, 1);
 182         OUT_RING(chan, en_lights);
 183         BEGIN_RING(chan, celsius, NV10TCL_LIGHTING_ENABLE, 1);
 184         OUT_RING(chan, ctx->Light.Enabled ? 1 : 0);
 185         BEGIN_RING(chan, celsius, NV10TCL_NORMALIZE_ENABLE, 1);
 186         OUT_RING(chan, ctx->Transform.Normalize ? 1 : 0);
 187 }
 188
 189 void
 190 nv10_emit_light_model(GLcontext *ctx, int emit)
 191 {
 192         struct nouveau_channel *chan = context_chan(ctx);
 193         struct nouveau_grobj *celsius = context_eng3d(ctx);
 194         struct gl_lightmodel *m = &ctx->Light.Model;
 195
 196         BEGIN_RING(chan, celsius, NV10TCL_SEPARATE_SPECULAR_ENABLE, 1);
 197         OUT_RING(chan, m->ColorControl == GL_SEPARATE_SPECULAR_COLOR ? 1 : 0);
 198
 199         BEGIN_RING(chan, celsius, NV10TCL_LIGHT_MODEL, 1);
 200         OUT_RING(chan, ((m->LocalViewer ?
 201                          NV10TCL_LIGHT_MODEL_LOCAL_VIEWER : 0) |
 202                         (NEED_SECONDARY_COLOR(ctx) ?
 203                          NV10TCL_LIGHT_MODEL_SEPARATE_SPECULAR : 0) |
 204                         (!ctx->Light.Enabled && ctx->Fog.ColorSumEnabled ?
 205                          NV10TCL_LIGHT_MODEL_VERTEX_SPECULAR : 0)));
 206 }
 207
 208 static float
 209 get_shine(const float p[], float x)
 210 {
 211         const int n = 15;
 212         const float *y = &p[1];
 213         float f = (n - 1) * (1 - 1 / (1 + p[0] * x))
 214                 / (1 - 1 / (1 + p[0] * 1024));
 215         int i = f;
 216
 217         /* Linear interpolation in f-space (Faster and somewhat more
 218          * accurate than x-space). */
 219         if (x == 0)
 220                 return y[0];
 221         else if (i > n - 2)
 222                 return y[n - 1];
 223         else
 224                 return y[i] + (y[i + 1] - y[i]) * (f - i);
 225 }
 226
 227 static const float nv10_spot_params[2][16] = {
 228         { 0.02, -3.80e-05, -1.77, -2.41, -2.71, -2.88, -2.98, -3.06,
 229           -3.11, -3.17, -3.23, -3.28, -3.37, -3.47, -3.83, -5.11 },
 230         { 0.02, -0.01, 1.77, 2.39, 2.70, 2.87, 2.98, 3.06,
 231           3.10, 3.16, 3.23, 3.27, 3.37, 3.47, 3.83, 5.11 },
 232 };
 233
 234 void
 235 nv10_get_spot_coeff(struct gl_light *l, float k[7])
 236 {
 237         float e = l->SpotExponent;
 238         float a0, b0, a1, a2, b2, a3;
 239
 240         if (e > 0)
 241                 a0 = -1 - 5.36e-3 / sqrt(e);
 242         else
 243                 a0 = -1;
 244         b0 = 1 / (1 + 0.273 * e);
 245
 246         a1 = get_shine(nv10_spot_params[0], e);
 247
 248         a2 = get_shine(nv10_spot_params[1], e);
 249         b2 = 1 / (1 + 0.273 * e);
 250
 251         a3 = 0.9 + 0.278 * e;
 252
 253         if (l->SpotCutoff > 0) {
 254                 float cutoff = MAX2(a3, 1 / (1 - l->_CosCutoff));
 255
 256                 k[0] = MAX2(0, a0 + b0 * cutoff);
 257                 k[1] = a1;
 258                 k[2] = a2 + b2 * cutoff;
 259                 k[3] = - cutoff * l->_NormSpotDirection[0];
 260                 k[4] = - cutoff * l->_NormSpotDirection[1];
 261                 k[5] = - cutoff * l->_NormSpotDirection[2];
 262                 k[6] = 1 - cutoff;
 263
 264         } else {
 265                 k[0] = b0;
 266                 k[1] = a1;
 267                 k[2] = a2 + b2;
 268                 k[3] = - l->_NormSpotDirection[0];
 269                 k[4] = - l->_NormSpotDirection[1];
 270                 k[5] = - l->_NormSpotDirection[2];
 271                 k[6] = -1;
 272         }
 273 }
 274
 275 void
 276 nv10_emit_light_source(GLcontext *ctx, int emit)
 277 {
 278         const int i = emit - NOUVEAU_STATE_LIGHT_SOURCE0;
 279         struct nouveau_channel *chan = context_chan(ctx);
 280         struct nouveau_grobj *celsius = context_eng3d(ctx);
 281         struct gl_light *l = &ctx->Light.Light[i];
 282
 283         if (l->_Flags & LIGHT_POSITIONAL) {
 284                 BEGIN_RING(chan, celsius, NV10TCL_LIGHT_POSITION_X(i), 3);
 285                 OUT_RINGp(chan, l->_Position, 3);
 286
 287                 BEGIN_RING(chan, celsius,
 288                            NV10TCL_LIGHT_ATTENUATION_CONSTANT(i), 3);
 289                 OUT_RINGf(chan, l->ConstantAttenuation);
 290                 OUT_RINGf(chan, l->LinearAttenuation);
 291                 OUT_RINGf(chan, l->QuadraticAttenuation);
 292
 293         } else {
 294                 BEGIN_RING(chan, celsius, NV10TCL_LIGHT_DIRECTION_X(i), 3);
 295                 OUT_RINGp(chan, l->_VP_inf_norm, 3);
 296
 297                 BEGIN_RING(chan, celsius, NV10TCL_LIGHT_HALF_VECTOR_X(i), 3);
 298                 OUT_RINGp(chan, l->_h_inf_norm, 3);
 299         }
 300
 301         if (l->_Flags & LIGHT_SPOT) {
 302                 float k[7];
 303
 304                 nv10_get_spot_coeff(l, k);
 305
 306                 BEGIN_RING(chan, celsius, NV10TCL_LIGHT_SPOT_CUTOFF_A(i), 7);
 307                 OUT_RINGp(chan, k, 7);
 308         }
 309 }
 310
 311 #define USE_COLOR_MATERIAL(attr)                                        \
 312         (ctx->Light.ColorMaterialEnabled &&                             \
 313          ctx->Light.ColorMaterialBitmask & (1 << MAT_ATTRIB_FRONT_##attr))
 314
 315 void
 316 nv10_emit_material_ambient(GLcontext *ctx, int emit)
 317 {
 318         struct nouveau_channel *chan = context_chan(ctx);
 319         struct nouveau_grobj *celsius = context_eng3d(ctx);
 320         float (*mat)[4] = ctx->Light.Material.Attrib;
 321         float c_scene[3], c_factor[3];
 322         struct gl_light *l;
 323
 324         if (USE_COLOR_MATERIAL(AMBIENT)) {
 325                 COPY_3V(c_scene, ctx->Light.Model.Ambient);
 326                 COPY_3V(c_factor, mat[MAT_ATTRIB_FRONT_EMISSION]);
 327
 328         } else if (USE_COLOR_MATERIAL(EMISSION)) {
 329                 SCALE_3V(c_scene, mat[MAT_ATTRIB_FRONT_AMBIENT],
 330                          ctx->Light.Model.Ambient);
 331                 ZERO_3V(c_factor);
 332
 333         } else {
 334                 COPY_3V(c_scene, ctx->Light._BaseColor[0]);
 335                 ZERO_3V(c_factor);
 336         }
 337
 338         BEGIN_RING(chan, celsius, NV10TCL_LIGHT_MODEL_AMBIENT_R, 3);
 339         OUT_RINGp(chan, c_scene, 3);
 340
 341         if (ctx->Light.ColorMaterialEnabled) {
 342                 BEGIN_RING(chan, celsius, NV10TCL_MATERIAL_FACTOR_R, 3);
 343                 OUT_RINGp(chan, c_factor, 3);
 344         }
 345
 346         foreach(l, &ctx->Light.EnabledList) {
 347                 const int i = l - ctx->Light.Light;
 348                 float *c_light = (USE_COLOR_MATERIAL(AMBIENT) ?
 349                                   l->Ambient :
 350                                   l->_MatAmbient[0]);
 351
 352                 BEGIN_RING(chan, celsius, NV10TCL_LIGHT_AMBIENT_R(i), 3);
 353                 OUT_RINGp(chan, c_light, 3);
 354         }
 355 }
 356
 357 void
 358 nv10_emit_material_diffuse(GLcontext *ctx, int emit)
 359 {
 360         struct nouveau_channel *chan = context_chan(ctx);
 361         struct nouveau_grobj *celsius = context_eng3d(ctx);
 362         GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 363         struct gl_light *l;
 364
 365         BEGIN_RING(chan, celsius, NV10TCL_MATERIAL_FACTOR_A, 1);
 366         OUT_RINGf(chan, mat[MAT_ATTRIB_FRONT_DIFFUSE][3]);
 367
 368         foreach(l, &ctx->Light.EnabledList) {
 369                 const int i = l - ctx->Light.Light;
 370                 float *c_light = (USE_COLOR_MATERIAL(DIFFUSE) ?
 371                                   l->Diffuse :
 372                                   l->_MatDiffuse[0]);
 373
 374                 BEGIN_RING(chan, celsius, NV10TCL_LIGHT_DIFFUSE_R(i), 3);
 375                 OUT_RINGp(chan, c_light, 3);
 376         }
 377 }
 378
 379 void
 380 nv10_emit_material_specular(GLcontext *ctx, int emit)
 381 {
 382         struct nouveau_channel *chan = context_chan(ctx);
 383         struct nouveau_grobj *celsius = context_eng3d(ctx);
 384         struct gl_light *l;
 385
 386         foreach(l, &ctx->Light.EnabledList) {
 387                 const int i = l - ctx->Light.Light;
 388                 float *c_light = (USE_COLOR_MATERIAL(SPECULAR) ?
 389                                   l->Specular :
 390                                   l->_MatSpecular[0]);
 391
 392                 BEGIN_RING(chan, celsius, NV10TCL_LIGHT_SPECULAR_R(i), 3);
 393                 OUT_RINGp(chan, c_light, 3);
 394         }
 395 }
 396
 397 static const float nv10_shininess_param[6][16] = {
 398         { 0.70, 0.00, 0.06, 0.06, 0.05, 0.04, 0.02, 0.00,
 399           -0.06, -0.13, -0.24, -0.36, -0.51, -0.66, -0.82, -1.00 },
 400         { 0.01, 1.00, -2.29, -2.77, -2.96, -3.06, -3.12, -3.18,
 401           -3.24, -3.29, -3.36, -3.43, -3.51, -3.75, -4.33, -5.11 },
 402         { 0.02, 0.00, 2.28, 2.75, 2.94, 3.04, 3.1, 3.15,
 403           3.18, 3.22, 3.27, 3.32, 3.39, 3.48, 3.84, 5.11 },
 404         { 0.70, 0.00, 0.05, 0.06, 0.06, 0.06, 0.05, 0.04,
 405           0.02, 0.01, -0.03, -0.12, -0.25, -0.43, -0.68, -0.99 },
 406         { 0.01, 1.00, -1.61, -2.35, -2.67, -2.84, -2.96, -3.05,
 407           -3.08, -3.14, -3.2, -3.26, -3.32, -3.42, -3.54, -4.21 },
 408         { 0.01, 0.00, 2.25, 2.73, 2.92, 3.03, 3.09, 3.15,
 409           3.16, 3.21, 3.25, 3.29, 3.35, 3.43, 3.56, 4.22 },
 410 };
 411
 412 void
 413 nv10_get_shininess_coeff(float s, float k[6])
 414 {
 415         int i;
 416
 417         for (i = 0; i < 6; i++)
 418                 k[i] = get_shine(nv10_shininess_param[i], s);
 419 }
 420
 421 void
 422 nv10_emit_material_shininess(GLcontext *ctx, int emit)
 423 {
 424         struct nouveau_channel *chan = context_chan(ctx);
 425         struct nouveau_grobj *celsius = context_eng3d(ctx);
 426         float (*mat)[4] = ctx->Light.Material.Attrib;
 427         float k[6];
 428
 429         nv10_get_shininess_coeff(
 430                 CLAMP(mat[MAT_ATTRIB_FRONT_SHININESS][0], 0, 1024),
 431                 k);
 432
 433         BEGIN_RING(chan, celsius, NV10TCL_MATERIAL_SHININESS(0), 6);
 434         OUT_RINGp(chan, k, 6);
 435 }
 436
 437 void
 438 nv10_emit_modelview(GLcontext *ctx, int emit)
 439 {
 440         struct nouveau_context *nctx = to_nouveau_context(ctx);
 441         struct nouveau_channel *chan = context_chan(ctx);
 442         struct nouveau_grobj *celsius = context_eng3d(ctx);
 443         GLmatrix *m = ctx->ModelviewMatrixStack.Top;
 444
 445         if (nctx->fallback != HWTNL)
 446                 return;
 447
 448         if (ctx->Light._NeedEyeCoords || ctx->Fog.Enabled ||
 449             (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD)) {
 450                 BEGIN_RING(chan, celsius, NV10TCL_MODELVIEW0_MATRIX(0), 16);
 451                 OUT_RINGm(chan, m->m);
 452         }
 453
 454         if (ctx->Light.Enabled ||
 455             (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD)) {
 456                 int i, j;
 457
 458                 BEGIN_RING(chan, celsius,
 459                            NV10TCL_INVERSE_MODELVIEW0_MATRIX(0), 12);
 460                 for (i = 0; i < 3; i++)
 461                         for (j = 0; j < 4; j++)
 462                                 OUT_RINGf(chan, m->inv[4*i + j]);
 463         }
 464 }
 465
 466 void
 467 nv10_emit_point_parameter(GLcontext *ctx, int emit)
 468 {
 469 }
 470
 471 void
 472 nv10_emit_projection(GLcontext *ctx, int emit)
 473 {
 474         struct nouveau_context *nctx = to_nouveau_context(ctx);
 475         struct nouveau_channel *chan = context_chan(ctx);
 476         struct nouveau_grobj *celsius = context_eng3d(ctx);
 477         GLmatrix m;
 478
 479         _math_matrix_ctr(&m);
 480         get_viewport_scale(ctx, m.m);
 481
 482         if (nctx->fallback == HWTNL)
 483                 _math_matrix_mul_matrix(&m, &m, &ctx->_ModelProjectMatrix);
 484
 485         BEGIN_RING(chan, celsius, NV10TCL_PROJECTION_MATRIX(0), 16);
 486         OUT_RINGm(chan, m.m);
 487
 488         _math_matrix_dtr(&m);
 489 }