src/gallium/drivers/nv20/nv20_state.c

   1 #include "draw/draw_context.h"
   2 #include "pipe/p_state.h"
   3 #include "pipe/p_defines.h"
   4 #include "pipe/p_shader_tokens.h"
   5
   6 #include "tgsi/tgsi_parse.h"
   7
   8 #include "nv20_context.h"
   9 #include "nv20_state.h"
  10
  11 static void *
  12 nv20_blend_state_create(struct pipe_context *pipe,
  13                         const struct pipe_blend_state *cso)
  14 {
  15         struct nv20_blend_state *cb;
  16
  17         cb = MALLOC(sizeof(struct nv20_blend_state));
  18
  19         cb->b_enable = cso->blend_enable ? 1 : 0;
  20         cb->b_srcfunc = ((nvgl_blend_func(cso->alpha_src_factor)<<16) |
  21                          (nvgl_blend_func(cso->rgb_src_factor)));
  22         cb->b_dstfunc = ((nvgl_blend_func(cso->alpha_dst_factor)<<16) |
  23                          (nvgl_blend_func(cso->rgb_dst_factor)));
  24
  25         cb->c_mask = (((cso->colormask & PIPE_MASK_A) ? (0x01<<24) : 0) |
  26                       ((cso->colormask & PIPE_MASK_R) ? (0x01<<16) : 0) |
  27                       ((cso->colormask & PIPE_MASK_G) ? (0x01<< 8) : 0) |
  28                       ((cso->colormask & PIPE_MASK_B) ? (0x01<< 0) : 0));
  29
  30         cb->d_enable = cso->dither ? 1 : 0;
  31
  32         return (void *)cb;
  33 }
  34
  35 static void
  36 nv20_blend_state_bind(struct pipe_context *pipe, void *blend)
  37 {
  38         struct nv20_context *nv20 = nv20_context(pipe);
  39
  40         nv20->blend = (struct nv20_blend_state*)blend;
  41
  42         nv20->dirty |= NV20_NEW_BLEND;
  43 }
  44
  45 static void
  46 nv20_blend_state_delete(struct pipe_context *pipe, void *hwcso)
  47 {
  48         FREE(hwcso);
  49 }
  50
  51
  52 static INLINE unsigned
  53 wrap_mode(unsigned wrap) {
  54         unsigned ret;
  55
  56         switch (wrap) {
  57         case PIPE_TEX_WRAP_REPEAT:
  58                 ret = NV20TCL_TX_WRAP_S_REPEAT;
  59                 break;
  60         case PIPE_TEX_WRAP_MIRROR_REPEAT:
  61                 ret = NV20TCL_TX_WRAP_S_MIRRORED_REPEAT;
  62                 break;
  63         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  64                 ret = NV20TCL_TX_WRAP_S_CLAMP_TO_EDGE;
  65                 break;
  66         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  67                 ret = NV20TCL_TX_WRAP_S_CLAMP_TO_BORDER;
  68                 break;
  69         case PIPE_TEX_WRAP_CLAMP:
  70                 ret = NV20TCL_TX_WRAP_S_CLAMP;
  71                 break;
  72         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  73         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  74         case PIPE_TEX_WRAP_MIRROR_CLAMP:
  75         default:
  76                 NOUVEAU_ERR("unknown wrap mode: %d\n", wrap);
  77                 ret = NV20TCL_TX_WRAP_S_REPEAT;
  78                 break;
  79         }
  80
  81         return (ret >> NV20TCL_TX_WRAP_S_SHIFT);
  82 }
  83
  84 static void *
  85 nv20_sampler_state_create(struct pipe_context *pipe,
  86                           const struct pipe_sampler_state *cso)
  87 {
  88         struct nv20_sampler_state *ps;
  89         uint32_t filter = 0;
  90
  91         ps = MALLOC(sizeof(struct nv20_sampler_state));
  92
  93         ps->wrap = ((wrap_mode(cso->wrap_s) << NV20TCL_TX_WRAP_S_SHIFT) |
  94                     (wrap_mode(cso->wrap_t) << NV20TCL_TX_WRAP_T_SHIFT));
  95
  96         ps->en = 0;
  97         if (cso->max_anisotropy > 1.0) {
  98                 /* no idea, binary driver sets it, works without it.. meh.. */
  99                 ps->wrap |= (1 << 5);
 100
 101 /*              if (cso->max_anisotropy >= 8.0) {
 102                         ps->en |= NV20TCL_TX_ENABLE_ANISO_8X;
 103                 } else
 104                 if (cso->max_anisotropy >= 4.0) {
 105                         ps->en |= NV20TCL_TX_ENABLE_ANISO_4X;
 106                 } else {
 107                         ps->en |= NV20TCL_TX_ENABLE_ANISO_2X;
 108                 }*/
 109         }
 110
 111         switch (cso->mag_img_filter) {
 112         case PIPE_TEX_FILTER_LINEAR:
 113                 filter |= NV20TCL_TX_FILTER_MAGNIFY_LINEAR;
 114                 break;
 115         case PIPE_TEX_FILTER_NEAREST:
 116         default:
 117                 filter |= NV20TCL_TX_FILTER_MAGNIFY_NEAREST;
 118                 break;
 119         }
 120
 121         switch (cso->min_img_filter) {
 122         case PIPE_TEX_FILTER_LINEAR:
 123                 switch (cso->min_mip_filter) {
 124                 case PIPE_TEX_MIPFILTER_NEAREST:
 125                         filter |=
 126                                 NV20TCL_TX_FILTER_MINIFY_LINEAR_MIPMAP_NEAREST;
 127                         break;
 128                 case PIPE_TEX_MIPFILTER_LINEAR:
 129                         filter |= NV20TCL_TX_FILTER_MINIFY_LINEAR_MIPMAP_LINEAR;
 130                         break;
 131                 case PIPE_TEX_MIPFILTER_NONE:
 132                 default:
 133                         filter |= NV20TCL_TX_FILTER_MINIFY_LINEAR;
 134                         break;
 135                 }
 136                 break;
 137         case PIPE_TEX_FILTER_NEAREST:
 138         default:
 139                 switch (cso->min_mip_filter) {
 140                 case PIPE_TEX_MIPFILTER_NEAREST:
 141                         filter |=
 142                                 NV20TCL_TX_FILTER_MINIFY_NEAREST_MIPMAP_NEAREST;
 143                 break;
 144                 case PIPE_TEX_MIPFILTER_LINEAR:
 145                         filter |=
 146                                 NV20TCL_TX_FILTER_MINIFY_NEAREST_MIPMAP_LINEAR;
 147                         break;
 148                 case PIPE_TEX_MIPFILTER_NONE:
 149                 default:
 150                         filter |= NV20TCL_TX_FILTER_MINIFY_NEAREST;
 151                         break;
 152                 }
 153                 break;
 154         }
 155
 156         ps->filt = filter;
 157
 158 /*      if (cso->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) {
 159                 switch (cso->compare_func) {
 160                 case PIPE_FUNC_NEVER:
 161                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_NEVER;
 162                         break;
 163                 case PIPE_FUNC_GREATER:
 164                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_GREATER;
 165                         break;
 166                 case PIPE_FUNC_EQUAL:
 167                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_EQUAL;
 168                         break;
 169                 case PIPE_FUNC_GEQUAL:
 170                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_GEQUAL;
 171                         break;
 172                 case PIPE_FUNC_LESS:
 173                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_LESS;
 174                         break;
 175                 case PIPE_FUNC_NOTEQUAL:
 176                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_NOTEQUAL;
 177                         break;
 178                 case PIPE_FUNC_LEQUAL:
 179                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_LEQUAL;
 180                         break;
 181                 case PIPE_FUNC_ALWAYS:
 182                         ps->wrap |= NV10TCL_TX_WRAP_RCOMP_ALWAYS;
 183                         break;
 184                 default:
 185                         break;
 186                 }
 187         }*/
 188
 189         ps->bcol = ((float_to_ubyte(cso->border_color[3]) << 24) |
 190                     (float_to_ubyte(cso->border_color[0]) << 16) |
 191                     (float_to_ubyte(cso->border_color[1]) <<  8) |
 192                     (float_to_ubyte(cso->border_color[2]) <<  0));
 193
 194         return (void *)ps;
 195 }
 196
 197 static void
 198 nv20_sampler_state_bind(struct pipe_context *pipe, unsigned nr, void **sampler)
 199 {
 200         struct nv20_context *nv20 = nv20_context(pipe);
 201         unsigned unit;
 202
 203         for (unit = 0; unit < nr; unit++) {
 204                 nv20->tex_sampler[unit] = sampler[unit];
 205                 nv20->dirty_samplers |= (1 << unit);
 206         }
 207 }
 208
 209 static void
 210 nv20_sampler_state_delete(struct pipe_context *pipe, void *hwcso)
 211 {
 212         FREE(hwcso);
 213 }
 214
 215 static void
 216 nv20_set_sampler_texture(struct pipe_context *pipe, unsigned nr,
 217                          struct pipe_texture **miptree)
 218 {
 219         struct nv20_context *nv20 = nv20_context(pipe);
 220         unsigned unit;
 221
 222         for (unit = 0; unit < nr; unit++) {
 223                 nv20->tex_miptree[unit] = (struct nv20_miptree *)miptree[unit];
 224                 nv20->dirty_samplers |= (1 << unit);
 225         }
 226 }
 227
 228 static void *
 229 nv20_rasterizer_state_create(struct pipe_context *pipe,
 230                              const struct pipe_rasterizer_state *cso)
 231 {
 232         struct nv20_rasterizer_state *rs;
 233         int i;
 234
 235         /*XXX: ignored:
 236          *      light_twoside
 237          *      offset_cw/ccw -nohw
 238          *      scissor
 239          *      point_smooth -nohw
 240          *      multisample
 241          *      offset_units / offset_scale
 242          */
 243         rs = MALLOC(sizeof(struct nv20_rasterizer_state));
 244
 245         rs->templ = cso;
 246
 247         rs->shade_model = cso->flatshade ? NV20TCL_SHADE_MODEL_FLAT :
 248                                                 NV20TCL_SHADE_MODEL_SMOOTH;
 249
 250         rs->line_width = (unsigned char)(cso->line_width * 8.0) & 0xff;
 251         rs->line_smooth_en = cso->line_smooth ? 1 : 0;
 252
 253         /* XXX: nv20 and nv25 different! */
 254         rs->point_size = *(uint32_t*)&cso->point_size;
 255
 256         rs->poly_smooth_en = cso->poly_smooth ? 1 : 0;
 257
 258         if (cso->front_winding == PIPE_WINDING_CCW) {
 259                 rs->front_face = NV20TCL_FRONT_FACE_CCW;
 260                 rs->poly_mode_front = nvgl_polygon_mode(cso->fill_ccw);
 261                 rs->poly_mode_back  = nvgl_polygon_mode(cso->fill_cw);
 262         } else {
 263                 rs->front_face = NV20TCL_FRONT_FACE_CW;
 264                 rs->poly_mode_front = nvgl_polygon_mode(cso->fill_cw);
 265                 rs->poly_mode_back  = nvgl_polygon_mode(cso->fill_ccw);
 266         }
 267
 268         switch (cso->cull_mode) {
 269         case PIPE_WINDING_CCW:
 270                 rs->cull_face_en = 1;
 271                 if (cso->front_winding == PIPE_WINDING_CCW)
 272                         rs->cull_face    = NV20TCL_CULL_FACE_FRONT;
 273                 else
 274                         rs->cull_face    = NV20TCL_CULL_FACE_BACK;
 275                 break;
 276         case PIPE_WINDING_CW:
 277                 rs->cull_face_en = 1;
 278                 if (cso->front_winding == PIPE_WINDING_CW)
 279                         rs->cull_face    = NV20TCL_CULL_FACE_FRONT;
 280                 else
 281                         rs->cull_face    = NV20TCL_CULL_FACE_BACK;
 282                 break;
 283         case PIPE_WINDING_BOTH:
 284                 rs->cull_face_en = 1;
 285                 rs->cull_face    = NV20TCL_CULL_FACE_FRONT_AND_BACK;
 286                 break;
 287         case PIPE_WINDING_NONE:
 288         default:
 289                 rs->cull_face_en = 0;
 290                 rs->cull_face    = 0;
 291                 break;
 292         }
 293
 294         if (cso->point_sprite) {
 295                 rs->point_sprite = (1 << 0);
 296                 for (i = 0; i < 8; i++) {
 297                         if (cso->sprite_coord_mode[i] != PIPE_SPRITE_COORD_NONE)
 298                                 rs->point_sprite |= (1 << (8 + i));
 299                 }
 300         } else {
 301                 rs->point_sprite = 0;
 302         }
 303
 304         return (void *)rs;
 305 }
 306
 307 static void
 308 nv20_rasterizer_state_bind(struct pipe_context *pipe, void *rast)
 309 {
 310         struct nv20_context *nv20 = nv20_context(pipe);
 311
 312         nv20->rast = (struct nv20_rasterizer_state*)rast;
 313
 314         draw_set_rasterizer_state(nv20->draw, (nv20->rast ? nv20->rast->templ : NULL));
 315
 316         nv20->dirty |= NV20_NEW_RAST;
 317 }
 318
 319 static void
 320 nv20_rasterizer_state_delete(struct pipe_context *pipe, void *hwcso)
 321 {
 322         FREE(hwcso);
 323 }
 324
 325 static void *
 326 nv20_depth_stencil_alpha_state_create(struct pipe_context *pipe,
 327                         const struct pipe_depth_stencil_alpha_state *cso)
 328 {
 329         struct nv20_depth_stencil_alpha_state *hw;
 330
 331         hw = MALLOC(sizeof(struct nv20_depth_stencil_alpha_state));
 332
 333         hw->depth.func          = nvgl_comparison_op(cso->depth.func);
 334         hw->depth.write_enable  = cso->depth.writemask ? 1 : 0;
 335         hw->depth.test_enable   = cso->depth.enabled ? 1 : 0;
 336
 337         hw->stencil.enable = cso->stencil[0].enabled ? 1 : 0;
 338         hw->stencil.wmask = cso->stencil[0].writemask;
 339         hw->stencil.func = nvgl_comparison_op(cso->stencil[0].func);
 340         hw->stencil.ref = cso->stencil[0].ref_value;
 341         hw->stencil.vmask = cso->stencil[0].valuemask;
 342         hw->stencil.fail = nvgl_stencil_op(cso->stencil[0].fail_op);
 343         hw->stencil.zfail = nvgl_stencil_op(cso->stencil[0].zfail_op);
 344         hw->stencil.zpass = nvgl_stencil_op(cso->stencil[0].zpass_op);
 345
 346         hw->alpha.enabled = cso->alpha.enabled ? 1 : 0;
 347         hw->alpha.func = nvgl_comparison_op(cso->alpha.func);
 348         hw->alpha.ref  = float_to_ubyte(cso->alpha.ref_value);
 349
 350         return (void *)hw;
 351 }
 352
 353 static void
 354 nv20_depth_stencil_alpha_state_bind(struct pipe_context *pipe, void *dsa)
 355 {
 356         struct nv20_context *nv20 = nv20_context(pipe);
 357
 358         nv20->dsa = (struct nv20_depth_stencil_alpha_state*)dsa;
 359
 360         nv20->dirty |= NV20_NEW_DSA;
 361 }
 362
 363 static void
 364 nv20_depth_stencil_alpha_state_delete(struct pipe_context *pipe, void *hwcso)
 365 {
 366         FREE(hwcso);
 367 }
 368
 369 static void *
 370 nv20_vp_state_create(struct pipe_context *pipe,
 371                      const struct pipe_shader_state *templ)
 372 {
 373         struct nv20_context *nv20 = nv20_context(pipe);
 374
 375         return draw_create_vertex_shader(nv20->draw, templ);
 376 }
 377
 378 static void
 379 nv20_vp_state_bind(struct pipe_context *pipe, void *shader)
 380 {
 381         struct nv20_context *nv20 = nv20_context(pipe);
 382
 383         draw_bind_vertex_shader(nv20->draw, (struct draw_vertex_shader *) shader);
 384
 385         nv20->dirty |= NV20_NEW_VERTPROG;
 386 }
 387
 388 static void
 389 nv20_vp_state_delete(struct pipe_context *pipe, void *shader)
 390 {
 391         struct nv20_context *nv20 = nv20_context(pipe);
 392
 393         draw_delete_vertex_shader(nv20->draw, (struct draw_vertex_shader *) shader);
 394 }
 395
 396 static void *
 397 nv20_fp_state_create(struct pipe_context *pipe,
 398                      const struct pipe_shader_state *cso)
 399 {
 400         struct nv20_fragment_program *fp;
 401
 402         fp = CALLOC(1, sizeof(struct nv20_fragment_program));
 403         fp->pipe.tokens = tgsi_dup_tokens(cso->tokens);
 404
 405         tgsi_scan_shader(cso->tokens, &fp->info);
 406
 407         return (void *)fp;
 408 }
 409
 410 static void
 411 nv20_fp_state_bind(struct pipe_context *pipe, void *hwcso)
 412 {
 413         struct nv20_context *nv20 = nv20_context(pipe);
 414         struct nv20_fragment_program *fp = hwcso;
 415
 416         nv20->fragprog.current = fp;
 417         nv20->dirty |= NV20_NEW_FRAGPROG;
 418 }
 419
 420 static void
 421 nv20_fp_state_delete(struct pipe_context *pipe, void *hwcso)
 422 {
 423         struct nv20_context *nv20 = nv20_context(pipe);
 424         struct nv20_fragment_program *fp = hwcso;
 425
 426         nv20_fragprog_destroy(nv20, fp);
 427         FREE((void*)fp->pipe.tokens);
 428         FREE(fp);
 429 }
 430
 431 static void
 432 nv20_set_blend_color(struct pipe_context *pipe,
 433                      const struct pipe_blend_color *bcol)
 434 {
 435         struct nv20_context *nv20 = nv20_context(pipe);
 436
 437         nv20->blend_color = (struct pipe_blend_color*)bcol;
 438
 439         nv20->dirty |= NV20_NEW_BLENDCOL;
 440 }
 441
 442 static void
 443 nv20_set_clip_state(struct pipe_context *pipe,
 444                     const struct pipe_clip_state *clip)
 445 {
 446         struct nv20_context *nv20 = nv20_context(pipe);
 447
 448         draw_set_clip_state(nv20->draw, clip);
 449 }
 450
 451 static void
 452 nv20_set_constant_buffer(struct pipe_context *pipe, uint shader, uint index,
 453                          const struct pipe_constant_buffer *buf )
 454 {
 455         struct nv20_context *nv20 = nv20_context(pipe);
 456         struct pipe_winsys *ws = pipe->winsys;
 457
 458         assert(shader < PIPE_SHADER_TYPES);
 459         assert(index == 0);
 460
 461         if (buf) {
 462                 void *mapped;
 463                 if (buf->size && (mapped = ws->buffer_map(ws, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)))
 464                 {
 465                         memcpy(nv20->constbuf[shader], mapped, buf->size);
 466                         nv20->constbuf_nr[shader] =
 467                                 buf->size / (4 * sizeof(float));
 468                         ws->buffer_unmap(ws, buf->buffer);
 469                 }
 470         }
 471 }
 472
 473 static void
 474 nv20_set_framebuffer_state(struct pipe_context *pipe,
 475                            const struct pipe_framebuffer_state *fb)
 476 {
 477         struct nv20_context *nv20 = nv20_context(pipe);
 478
 479         nv20->framebuffer = (struct pipe_framebuffer_state*)fb;
 480
 481         nv20->dirty |= NV20_NEW_FRAMEBUFFER;
 482 }
 483
 484 static void
 485 nv20_set_polygon_stipple(struct pipe_context *pipe,
 486                          const struct pipe_poly_stipple *stipple)
 487 {
 488         NOUVEAU_ERR("line stipple hahaha\n");
 489 }
 490
 491 static void
 492 nv20_set_scissor_state(struct pipe_context *pipe,
 493                        const struct pipe_scissor_state *s)
 494 {
 495         struct nv20_context *nv20 = nv20_context(pipe);
 496
 497         nv20->scissor = (struct pipe_scissor_state*)s;
 498
 499         nv20->dirty |= NV20_NEW_SCISSOR;
 500 }
 501
 502 static void
 503 nv20_set_viewport_state(struct pipe_context *pipe,
 504                         const struct pipe_viewport_state *vpt)
 505 {
 506         struct nv20_context *nv20 = nv20_context(pipe);
 507
 508         nv20->viewport = (struct pipe_viewport_state*)vpt;
 509
 510         draw_set_viewport_state(nv20->draw, nv20->viewport);
 511
 512         nv20->dirty |= NV20_NEW_VIEWPORT;
 513 }
 514
 515 static void
 516 nv20_set_vertex_buffers(struct pipe_context *pipe, unsigned count,
 517                         const struct pipe_vertex_buffer *vb)
 518 {
 519         struct nv20_context *nv20 = nv20_context(pipe);
 520
 521         memcpy(nv20->vtxbuf, vb, sizeof(*vb) * count);
 522         nv20->dirty |= NV20_NEW_VTXARRAYS;
 523
 524         draw_set_vertex_buffers(nv20->draw, count, vb);
 525 }
 526
 527 static void
 528 nv20_set_vertex_elements(struct pipe_context *pipe, unsigned count,
 529                          const struct pipe_vertex_element *ve)
 530 {
 531         struct nv20_context *nv20 = nv20_context(pipe);
 532
 533         memcpy(nv20->vtxelt, ve, sizeof(*ve) * count);
 534         nv20->dirty |= NV20_NEW_VTXARRAYS;
 535
 536         draw_set_vertex_elements(nv20->draw, count, ve);
 537 }
 538
 539 void
 540 nv20_init_state_functions(struct nv20_context *nv20)
 541 {
 542         nv20->pipe.create_blend_state = nv20_blend_state_create;
 543         nv20->pipe.bind_blend_state = nv20_blend_state_bind;
 544         nv20->pipe.delete_blend_state = nv20_blend_state_delete;
 545
 546         nv20->pipe.create_sampler_state = nv20_sampler_state_create;
 547         nv20->pipe.bind_sampler_states = nv20_sampler_state_bind;
 548         nv20->pipe.delete_sampler_state = nv20_sampler_state_delete;
 549         nv20->pipe.set_sampler_textures = nv20_set_sampler_texture;
 550
 551         nv20->pipe.create_rasterizer_state = nv20_rasterizer_state_create;
 552         nv20->pipe.bind_rasterizer_state = nv20_rasterizer_state_bind;
 553         nv20->pipe.delete_rasterizer_state = nv20_rasterizer_state_delete;
 554
 555         nv20->pipe.create_depth_stencil_alpha_state =
 556                 nv20_depth_stencil_alpha_state_create;
 557         nv20->pipe.bind_depth_stencil_alpha_state =
 558                 nv20_depth_stencil_alpha_state_bind;
 559         nv20->pipe.delete_depth_stencil_alpha_state =
 560                 nv20_depth_stencil_alpha_state_delete;
 561
 562         nv20->pipe.create_vs_state = nv20_vp_state_create;
 563         nv20->pipe.bind_vs_state = nv20_vp_state_bind;
 564         nv20->pipe.delete_vs_state = nv20_vp_state_delete;
 565
 566         nv20->pipe.create_fs_state = nv20_fp_state_create;
 567         nv20->pipe.bind_fs_state = nv20_fp_state_bind;
 568         nv20->pipe.delete_fs_state = nv20_fp_state_delete;
 569
 570         nv20->pipe.set_blend_color = nv20_set_blend_color;
 571         nv20->pipe.set_clip_state = nv20_set_clip_state;
 572         nv20->pipe.set_constant_buffer = nv20_set_constant_buffer;
 573         nv20->pipe.set_framebuffer_state = nv20_set_framebuffer_state;
 574         nv20->pipe.set_polygon_stipple = nv20_set_polygon_stipple;
 575         nv20->pipe.set_scissor_state = nv20_set_scissor_state;
 576         nv20->pipe.set_viewport_state = nv20_set_viewport_state;
 577
 578         nv20->pipe.set_vertex_buffers = nv20_set_vertex_buffers;
 579         nv20->pipe.set_vertex_elements = nv20_set_vertex_elements;
 580 }
 581