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 "nv10_3d.xml.h"
  32 #include "nv10_driver.h"
  33
  34 void
  35 nv10_emit_clip_plane(struct gl_context *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 |= NV10_3D_COLOR_MATERIAL_EMISSION;
  46         if (m & MAT_BIT_FRONT_AMBIENT)
  47                 ret |= NV10_3D_COLOR_MATERIAL_AMBIENT;
  48         if (m & MAT_BIT_FRONT_DIFFUSE)
  49                 ret |= NV10_3D_COLOR_MATERIAL_DIFFUSE;
  50         if (m & MAT_BIT_FRONT_SPECULAR)
  51                 ret |= NV10_3D_COLOR_MATERIAL_SPECULAR;
  52
  53         return ret;
  54 }
  55
  56 void
  57 nv10_emit_color_material(struct gl_context *ctx, int emit)
  58 {
  59         struct nouveau_pushbuf *push = context_push(ctx);
  60         unsigned mask = get_material_bitmask(ctx->Light._ColorMaterialBitmask);
  61
  62         BEGIN_NV04(push, NV10_3D(COLOR_MATERIAL), 1);
  63         PUSH_DATA (push, ctx->Light.ColorMaterialEnabled ? mask : 0);
  64 }
  65
  66 static unsigned
  67 get_fog_mode(unsigned mode)
  68 {
  69         switch (mode) {
  70         case GL_LINEAR:
  71                 return NV10_3D_FOG_MODE_LINEAR;
  72         case GL_EXP:
  73                 return NV10_3D_FOG_MODE_EXP;
  74         case GL_EXP2:
  75                 return NV10_3D_FOG_MODE_EXP2;
  76         default:
  77                 assert(0);
  78         }
  79 }
  80
  81 static unsigned
  82 get_fog_source(unsigned source, unsigned distance_mode)
  83 {
  84         switch (source) {
  85         case GL_FOG_COORDINATE_EXT:
  86                 return NV10_3D_FOG_COORD_FOG;
  87         case GL_FRAGMENT_DEPTH_EXT:
  88                 switch (distance_mode) {
  89                 case GL_EYE_PLANE_ABSOLUTE_NV:
  90                         return NV10_3D_FOG_COORD_DIST_ORTHOGONAL_ABS;
  91                 case GL_EYE_PLANE:
  92                         return NV10_3D_FOG_COORD_DIST_ORTHOGONAL;
  93                 case GL_EYE_RADIAL_NV:
  94                         return NV10_3D_FOG_COORD_DIST_RADIAL;
  95                 default:
  96                         assert(0);
  97                 }
  98         default:
  99                 assert(0);
 100         }
 101 }
 102
 103 void
 104 nv10_get_fog_coeff(struct gl_context *ctx, float k[3])
 105 {
 106         struct gl_fog_attrib *f = &ctx->Fog;
 107
 108         switch (f->Mode) {
 109         case GL_LINEAR:
 110                 k[0] = 2 + f->Start / (f->End - f->Start);
 111                 k[1] = -1 / (f->End - f->Start);
 112                 break;
 113
 114         case GL_EXP:
 115                 k[0] = 1.5;
 116                 k[1] = -0.09 * f->Density;
 117                 break;
 118
 119         case GL_EXP2:
 120                 k[0] = 1.5;
 121                 k[1] = -0.21 * f->Density;
 122                 break;
 123
 124         default:
 125                 assert(0);
 126         }
 127
 128         k[2] = 0;
 129 }
 130
 131 void
 132 nv10_emit_fog(struct gl_context *ctx, int emit)
 133 {
 134         struct nouveau_context *nctx = to_nouveau_context(ctx);
 135         struct nouveau_pushbuf *push = context_push(ctx);
 136         struct gl_fog_attrib *f = &ctx->Fog;
 137         unsigned source = nctx->fallback == HWTNL ?
 138                 f->FogCoordinateSource : GL_FOG_COORDINATE_EXT;
 139         float k[3];
 140
 141         nv10_get_fog_coeff(ctx, k);
 142
 143         BEGIN_NV04(push, NV10_3D(FOG_MODE), 4);
 144         PUSH_DATA (push, get_fog_mode(f->Mode));
 145         PUSH_DATA (push, get_fog_source(source, f->FogDistanceMode));
 146         PUSH_DATAb(push, f->Enabled);
 147         PUSH_DATA (push, pack_rgba_f(MESA_FORMAT_R8G8B8A8_UNORM, f->Color));
 148
 149         BEGIN_NV04(push, NV10_3D(FOG_COEFF(0)), 3);
 150         PUSH_DATAp(push, k, 3);
 151
 152         context_dirty(ctx, FRAG);
 153 }
 154
 155 static inline unsigned
 156 get_light_mode(struct gl_light *l)
 157 {
 158         if (l->Enabled) {
 159                 if (l->_Flags & LIGHT_SPOT)
 160                         return NV10_3D_ENABLED_LIGHTS_0_DIRECTIONAL;
 161                 else if (l->_Flags & LIGHT_POSITIONAL)
 162                         return NV10_3D_ENABLED_LIGHTS_0_POSITIONAL;
 163                 else
 164                         return NV10_3D_ENABLED_LIGHTS_0_NONPOSITIONAL;
 165         } else {
 166                 return NV10_3D_ENABLED_LIGHTS_0_DISABLED;
 167         }
 168 }
 169
 170 void
 171 nv10_emit_light_enable(struct gl_context *ctx, int emit)
 172 {
 173         struct nouveau_context *nctx = to_nouveau_context(ctx);
 174         struct nouveau_pushbuf *push = context_push(ctx);
 175         uint32_t en_lights = 0;
 176         int i;
 177
 178         if (nctx->fallback != HWTNL) {
 179                 BEGIN_NV04(push, NV10_3D(LIGHTING_ENABLE), 1);
 180                 PUSH_DATA (push, 0);
 181                 return;
 182         }
 183
 184         for (i = 0; i < MAX_LIGHTS; i++)
 185                 en_lights |= get_light_mode(&ctx->Light.Light[i]) << 2 * i;
 186
 187         BEGIN_NV04(push, NV10_3D(ENABLED_LIGHTS), 1);
 188         PUSH_DATA (push, en_lights);
 189         BEGIN_NV04(push, NV10_3D(LIGHTING_ENABLE), 1);
 190         PUSH_DATAb(push, ctx->Light.Enabled);
 191         BEGIN_NV04(push, NV10_3D(NORMALIZE_ENABLE), 1);
 192         PUSH_DATAb(push, ctx->Transform.Normalize);
 193 }
 194
 195 void
 196 nv10_emit_light_model(struct gl_context *ctx, int emit)
 197 {
 198         struct nouveau_pushbuf *push = context_push(ctx);
 199         struct gl_lightmodel *m = &ctx->Light.Model;
 200
 201         BEGIN_NV04(push, NV10_3D(SEPARATE_SPECULAR_ENABLE), 1);
 202         PUSH_DATAb(push, m->ColorControl == GL_SEPARATE_SPECULAR_COLOR);
 203
 204         BEGIN_NV04(push, NV10_3D(LIGHT_MODEL), 1);
 205         PUSH_DATA (push, ((m->LocalViewer ?
 206                          NV10_3D_LIGHT_MODEL_LOCAL_VIEWER : 0) |
 207                         (_mesa_need_secondary_color(ctx) ?
 208                          NV10_3D_LIGHT_MODEL_SEPARATE_SPECULAR : 0) |
 209                         (!ctx->Light.Enabled && ctx->Fog.ColorSumEnabled ?
 210                          NV10_3D_LIGHT_MODEL_VERTEX_SPECULAR : 0)));
 211 }
 212
 213 static float
 214 get_shine(const float p[], float x)
 215 {
 216         const int n = 15;
 217         const float *y = &p[1];
 218         float f = (n - 1) * (1 - 1 / (1 + p[0] * x))
 219                 / (1 - 1 / (1 + p[0] * 1024));
 220         int i = f;
 221
 222         /* Linear interpolation in f-space (Faster and somewhat more
 223          * accurate than x-space). */
 224         if (x == 0)
 225                 return y[0];
 226         else if (i > n - 2)
 227                 return y[n - 1];
 228         else
 229                 return y[i] + (y[i + 1] - y[i]) * (f - i);
 230 }
 231
 232 static const float nv10_spot_params[2][16] = {
 233         { 0.02, -3.80e-05, -1.77, -2.41, -2.71, -2.88, -2.98, -3.06,
 234           -3.11, -3.17, -3.23, -3.28, -3.37, -3.47, -3.83, -5.11 },
 235         { 0.02, -0.01, 1.77, 2.39, 2.70, 2.87, 2.98, 3.06,
 236           3.10, 3.16, 3.23, 3.27, 3.37, 3.47, 3.83, 5.11 },
 237 };
 238
 239 void
 240 nv10_get_spot_coeff(struct gl_light *l, float k[7])
 241 {
 242         float e = l->SpotExponent;
 243         float a0, b0, a1, a2, b2, a3;
 244
 245         if (e > 0)
 246                 a0 = -1 - 5.36e-3 / sqrt(e);
 247         else
 248                 a0 = -1;
 249         b0 = 1 / (1 + 0.273 * e);
 250
 251         a1 = get_shine(nv10_spot_params[0], e);
 252
 253         a2 = get_shine(nv10_spot_params[1], e);
 254         b2 = 1 / (1 + 0.273 * e);
 255
 256         a3 = 0.9 + 0.278 * e;
 257
 258         if (l->SpotCutoff > 0) {
 259                 float cutoff = MAX2(a3, 1 / (1 - l->_CosCutoff));
 260
 261                 k[0] = MAX2(0, a0 + b0 * cutoff);
 262                 k[1] = a1;
 263                 k[2] = a2 + b2 * cutoff;
 264                 k[3] = - cutoff * l->_NormSpotDirection[0];
 265                 k[4] = - cutoff * l->_NormSpotDirection[1];
 266                 k[5] = - cutoff * l->_NormSpotDirection[2];
 267                 k[6] = 1 - cutoff;
 268
 269         } else {
 270                 k[0] = b0;
 271                 k[1] = a1;
 272                 k[2] = a2 + b2;
 273                 k[3] = - l->_NormSpotDirection[0];
 274                 k[4] = - l->_NormSpotDirection[1];
 275                 k[5] = - l->_NormSpotDirection[2];
 276                 k[6] = -1;
 277         }
 278 }
 279
 280 void
 281 nv10_emit_light_source(struct gl_context *ctx, int emit)
 282 {
 283         const int i = emit - NOUVEAU_STATE_LIGHT_SOURCE0;
 284         struct nouveau_pushbuf *push = context_push(ctx);
 285         struct gl_light *l = &ctx->Light.Light[i];
 286
 287         if (l->_Flags & LIGHT_POSITIONAL) {
 288                 BEGIN_NV04(push, NV10_3D(LIGHT_POSITION_X(i)), 3);
 289                 PUSH_DATAp(push, l->_Position, 3);
 290
 291                 BEGIN_NV04(push, NV10_3D(LIGHT_ATTENUATION_CONSTANT(i)), 3);
 292                 PUSH_DATAf(push, l->ConstantAttenuation);
 293                 PUSH_DATAf(push, l->LinearAttenuation);
 294                 PUSH_DATAf(push, l->QuadraticAttenuation);
 295
 296         } else {
 297                 BEGIN_NV04(push, NV10_3D(LIGHT_DIRECTION_X(i)), 3);
 298                 PUSH_DATAp(push, l->_VP_inf_norm, 3);
 299
 300                 BEGIN_NV04(push, NV10_3D(LIGHT_HALF_VECTOR_X(i)), 3);
 301                 PUSH_DATAp(push, l->_h_inf_norm, 3);
 302         }
 303
 304         if (l->_Flags & LIGHT_SPOT) {
 305                 float k[7];
 306
 307                 nv10_get_spot_coeff(l, k);
 308
 309                 BEGIN_NV04(push, NV10_3D(LIGHT_SPOT_CUTOFF(i, 0)), 7);
 310                 PUSH_DATAp(push, k, 7);
 311         }
 312 }
 313
 314 #define USE_COLOR_MATERIAL(attr)                                        \
 315         (ctx->Light.ColorMaterialEnabled &&                             \
 316          ctx->Light._ColorMaterialBitmask & (1 << MAT_ATTRIB_FRONT_##attr))
 317
 318 void
 319 nv10_emit_material_ambient(struct gl_context *ctx, int emit)
 320 {
 321         struct nouveau_pushbuf *push = context_push(ctx);
 322         float (*mat)[4] = ctx->Light.Material.Attrib;
 323         float c_scene[3], c_factor[3];
 324         struct gl_light *l;
 325
 326         if (USE_COLOR_MATERIAL(AMBIENT)) {
 327                 COPY_3V(c_scene, ctx->Light.Model.Ambient);
 328                 COPY_3V(c_factor, mat[MAT_ATTRIB_FRONT_EMISSION]);
 329
 330         } else if (USE_COLOR_MATERIAL(EMISSION)) {
 331                 SCALE_3V(c_scene, mat[MAT_ATTRIB_FRONT_AMBIENT],
 332                          ctx->Light.Model.Ambient);
 333                 ZERO_3V(c_factor);
 334
 335         } else {
 336                 COPY_3V(c_scene, ctx->Light._BaseColor[0]);
 337                 ZERO_3V(c_factor);
 338         }
 339
 340         BEGIN_NV04(push, NV10_3D(LIGHT_MODEL_AMBIENT_R), 3);
 341         PUSH_DATAp(push, c_scene, 3);
 342
 343         if (ctx->Light.ColorMaterialEnabled) {
 344                 BEGIN_NV04(push, NV10_3D(MATERIAL_FACTOR_R), 3);
 345                 PUSH_DATAp(push, c_factor, 3);
 346         }
 347
 348         foreach(l, &ctx->Light.EnabledList) {
 349                 const int i = l - ctx->Light.Light;
 350                 float *c_light = (USE_COLOR_MATERIAL(AMBIENT) ?
 351                                   l->Ambient :
 352                                   l->_MatAmbient[0]);
 353
 354                 BEGIN_NV04(push, NV10_3D(LIGHT_AMBIENT_R(i)), 3);
 355                 PUSH_DATAp(push, c_light, 3);
 356         }
 357 }
 358
 359 void
 360 nv10_emit_material_diffuse(struct gl_context *ctx, int emit)
 361 {
 362         struct nouveau_pushbuf *push = context_push(ctx);
 363         GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
 364         struct gl_light *l;
 365
 366         BEGIN_NV04(push, NV10_3D(MATERIAL_FACTOR_A), 1);
 367         PUSH_DATAf(push, mat[MAT_ATTRIB_FRONT_DIFFUSE][3]);
 368
 369         foreach(l, &ctx->Light.EnabledList) {
 370                 const int i = l - ctx->Light.Light;
 371                 float *c_light = (USE_COLOR_MATERIAL(DIFFUSE) ?
 372                                   l->Diffuse :
 373                                   l->_MatDiffuse[0]);
 374
 375                 BEGIN_NV04(push, NV10_3D(LIGHT_DIFFUSE_R(i)), 3);
 376                 PUSH_DATAp(push, c_light, 3);
 377         }
 378 }
 379
 380 void
 381 nv10_emit_material_specular(struct gl_context *ctx, int emit)
 382 {
 383         struct nouveau_pushbuf *push = context_push(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_NV04(push, NV10_3D(LIGHT_SPECULAR_R(i)), 3);
 393                 PUSH_DATAp(push, 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(struct gl_context *ctx, int emit)
 423 {
 424         struct nouveau_pushbuf *push = context_push(ctx);
 425         float (*mat)[4] = ctx->Light.Material.Attrib;
 426         float k[6];
 427
 428         nv10_get_shininess_coeff(
 429                 CLAMP(mat[MAT_ATTRIB_FRONT_SHININESS][0], 0, 1024),
 430                 k);
 431
 432         BEGIN_NV04(push, NV10_3D(MATERIAL_SHININESS(0)), 6);
 433         PUSH_DATAp(push, k, 6);
 434 }
 435
 436 void
 437 nv10_emit_modelview(struct gl_context *ctx, int emit)
 438 {
 439         struct nouveau_context *nctx = to_nouveau_context(ctx);
 440         struct nouveau_pushbuf *push = context_push(ctx);
 441         GLmatrix *m = ctx->ModelviewMatrixStack.Top;
 442
 443         if (nctx->fallback != HWTNL)
 444                 return;
 445
 446         if (ctx->Light._NeedEyeCoords || ctx->Fog.Enabled ||
 447             (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD)) {
 448                 BEGIN_NV04(push, NV10_3D(MODELVIEW_MATRIX(0, 0)), 16);
 449                 PUSH_DATAm(push, m->m);
 450         }
 451
 452         if (ctx->Light.Enabled ||
 453             (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD)) {
 454                 int i, j;
 455
 456                 BEGIN_NV04(push, NV10_3D(INVERSE_MODELVIEW_MATRIX(0, 0)), 12);
 457                 for (i = 0; i < 3; i++)
 458                         for (j = 0; j < 4; j++)
 459                                 PUSH_DATAf(push, m->inv[4*i + j]);
 460         }
 461 }
 462
 463 void
 464 nv10_emit_point_parameter(struct gl_context *ctx, int emit)
 465 {
 466 }
 467
 468 void
 469 nv10_emit_projection(struct gl_context *ctx, int emit)
 470 {
 471         struct nouveau_context *nctx = to_nouveau_context(ctx);
 472         struct nouveau_pushbuf *push = context_push(ctx);
 473         GLmatrix m;
 474
 475         _math_matrix_ctr(&m);
 476         get_viewport_scale(ctx, m.m);
 477
 478         if (nv10_use_viewport_zclear(ctx))
 479                 m.m[MAT_SZ] /= 8;
 480
 481         if (nctx->fallback == HWTNL)
 482                 _math_matrix_mul_matrix(&m, &m, &ctx->_ModelProjectMatrix);
 483
 484         BEGIN_NV04(push, NV10_3D(PROJECTION_MATRIX(0)), 16);
 485         PUSH_DATAm(push, m.m);
 486
 487         _math_matrix_dtr(&m);
 488 }