src/gallium/state_trackers/xorg/xorg_exa_tgsi.c

   1 #include "xorg_exa_tgsi.h"
   2
   3 /*### stupidity defined in X11/extensions/XI.h */
   4 #undef Absolute
   5
   6 #include "pipe/p_format.h"
   7 #include "pipe/p_context.h"
   8 #include "pipe/p_state.h"
   9 #include "pipe/p_inlines.h"
  10 #include "pipe/p_shader_tokens.h"
  11
  12 #include "util/u_memory.h"
  13 #include "util/u_simple_shaders.h"
  14
  15 #include "tgsi/tgsi_ureg.h"
  16
  17 #include "cso_cache/cso_context.h"
  18 #include "cso_cache/cso_hash.h"
  19
  20 /* Vertex shader:
  21  * IN[0]    = vertex pos
  22  * IN[1]    = src tex coord | solid fill color
  23  * IN[2]    = mask tex coord
  24  * IN[3]    = dst tex coord
  25  * CONST[0] = (2/dst_width, 2/dst_height, 1, 1)
  26  * CONST[1] = (-1, -1, 0, 0)
  27  *
  28  * OUT[0]   = vertex pos
  29  * OUT[1]   = src tex coord | solid fill color
  30  * OUT[2]   = mask tex coord
  31  * OUT[3]   = dst tex coord
  32  */
  33
  34 /* Fragment shader:
  35  * SAMP[0]  = src
  36  * SAMP[1]  = mask
  37  * SAMP[2]  = dst
  38  * IN[0]    = pos src | solid fill color
  39  * IN[1]    = pos mask
  40  * IN[2]    = pos dst
  41  * CONST[0] = (0, 0, 0, 1)
  42  *
  43  * OUT[0] = color
  44  */
  45
  46 struct xorg_shaders {
  47    struct xorg_renderer *r;
  48
  49    struct cso_hash *vs_hash;
  50    struct cso_hash *fs_hash;
  51 };
  52
  53 static INLINE void
  54 src_in_mask(struct ureg_program *ureg,
  55             struct ureg_dst dst,
  56             struct ureg_src src,
  57             struct ureg_src mask,
  58             int component_alpha)
  59 {
  60    if (component_alpha == FS_CA_FULL) {
  61       ureg_MUL(ureg, dst, src, mask);
  62    } else if (component_alpha == FS_CA_SRCALPHA) {
  63       ureg_MUL(ureg, dst,
  64                ureg_scalar(src, TGSI_SWIZZLE_W), mask);
  65    }
  66    else {
  67       ureg_MUL(ureg, dst, src,
  68                ureg_scalar(mask, TGSI_SWIZZLE_X));
  69    }
  70 }
  71
  72 static struct ureg_src
  73 vs_normalize_coords(struct ureg_program *ureg, struct ureg_src coords,
  74                     struct ureg_src const0, struct ureg_src const1)
  75 {
  76    struct ureg_dst tmp = ureg_DECL_temporary(ureg);
  77    struct ureg_src ret;
  78    ureg_MAD(ureg, tmp, coords, const0, const1);
  79    ret = ureg_src(tmp);
  80    ureg_release_temporary(ureg, tmp);
  81    return ret;
  82 }
  83
  84 static void
  85 linear_gradient(struct ureg_program *ureg,
  86                 struct ureg_dst out,
  87                 struct ureg_src pos,
  88                 struct ureg_src sampler,
  89                 struct ureg_src coords,
  90                 struct ureg_src const0124,
  91                 struct ureg_src matrow0,
  92                 struct ureg_src matrow1,
  93                 struct ureg_src matrow2)
  94 {
  95    struct ureg_dst temp0 = ureg_DECL_temporary(ureg);
  96    struct ureg_dst temp1 = ureg_DECL_temporary(ureg);
  97    struct ureg_dst temp2 = ureg_DECL_temporary(ureg);
  98    struct ureg_dst temp3 = ureg_DECL_temporary(ureg);
  99    struct ureg_dst temp4 = ureg_DECL_temporary(ureg);
 100    struct ureg_dst temp5 = ureg_DECL_temporary(ureg);
 101
 102    ureg_MOV(ureg,
 103             ureg_writemask(temp0, TGSI_WRITEMASK_XY), pos);
 104    ureg_MOV(ureg,
 105             ureg_writemask(temp0, TGSI_WRITEMASK_Z),
 106             ureg_scalar(const0124, TGSI_SWIZZLE_Y));
 107
 108    ureg_DP3(ureg, temp1, matrow0, ureg_src(temp0));
 109    ureg_DP3(ureg, temp2, matrow1, ureg_src(temp0));
 110    ureg_DP3(ureg, temp3, matrow2, ureg_src(temp0));
 111    ureg_RCP(ureg, temp3, ureg_src(temp3));
 112    ureg_MUL(ureg, temp1, ureg_src(temp1), ureg_src(temp3));
 113    ureg_MUL(ureg, temp2, ureg_src(temp2), ureg_src(temp3));
 114
 115    ureg_MOV(ureg, ureg_writemask(temp4, TGSI_WRITEMASK_X),
 116             ureg_src(temp1));
 117    ureg_MOV(ureg, ureg_writemask(temp4, TGSI_WRITEMASK_Y),
 118             ureg_src(temp2));
 119
 120    ureg_MUL(ureg, temp0,
 121             ureg_scalar(coords, TGSI_SWIZZLE_Y),
 122             ureg_scalar(ureg_src(temp4), TGSI_SWIZZLE_Y));
 123    ureg_MAD(ureg, temp1,
 124             ureg_scalar(coords, TGSI_SWIZZLE_X),
 125             ureg_scalar(ureg_src(temp4), TGSI_SWIZZLE_X),
 126             ureg_src(temp0));
 127
 128    ureg_MUL(ureg, temp2,
 129             ureg_src(temp1),
 130             ureg_scalar(coords, TGSI_SWIZZLE_Z));
 131
 132    ureg_TEX(ureg, out,
 133             TGSI_TEXTURE_1D, ureg_src(temp2), sampler);
 134
 135    ureg_release_temporary(ureg, temp0);
 136    ureg_release_temporary(ureg, temp1);
 137    ureg_release_temporary(ureg, temp2);
 138    ureg_release_temporary(ureg, temp3);
 139    ureg_release_temporary(ureg, temp4);
 140    ureg_release_temporary(ureg, temp5);
 141 }
 142
 143
 144 static void
 145 radial_gradient(struct ureg_program *ureg,
 146                 struct ureg_dst out,
 147                 struct ureg_src pos,
 148                 struct ureg_src sampler,
 149                 struct ureg_src coords,
 150                 struct ureg_src const0124,
 151                 struct ureg_src matrow0,
 152                 struct ureg_src matrow1,
 153                 struct ureg_src matrow2)
 154 {
 155    struct ureg_dst temp0 = ureg_DECL_temporary(ureg);
 156    struct ureg_dst temp1 = ureg_DECL_temporary(ureg);
 157    struct ureg_dst temp2 = ureg_DECL_temporary(ureg);
 158    struct ureg_dst temp3 = ureg_DECL_temporary(ureg);
 159    struct ureg_dst temp4 = ureg_DECL_temporary(ureg);
 160    struct ureg_dst temp5 = ureg_DECL_temporary(ureg);
 161
 162    ureg_MOV(ureg,
 163             ureg_writemask(temp0, TGSI_WRITEMASK_XY),
 164             pos);
 165    ureg_MOV(ureg,
 166             ureg_writemask(temp0, TGSI_WRITEMASK_Z),
 167             ureg_scalar(const0124, TGSI_SWIZZLE_Y));
 168
 169    ureg_DP3(ureg, temp1, matrow0, ureg_src(temp0));
 170    ureg_DP3(ureg, temp2, matrow1, ureg_src(temp0));
 171    ureg_DP3(ureg, temp3, matrow2, ureg_src(temp0));
 172    ureg_RCP(ureg, temp3, ureg_src(temp3));
 173    ureg_MUL(ureg, temp1, ureg_src(temp1), ureg_src(temp3));
 174    ureg_MUL(ureg, temp2, ureg_src(temp2), ureg_src(temp3));
 175
 176    ureg_MOV(ureg, ureg_writemask(temp5, TGSI_WRITEMASK_X),
 177             ureg_src(temp1));
 178    ureg_MOV(ureg, ureg_writemask(temp5, TGSI_WRITEMASK_Y),
 179             ureg_src(temp2));
 180
 181    ureg_MUL(ureg, temp0, ureg_scalar(coords, TGSI_SWIZZLE_Y),
 182             ureg_scalar(ureg_src(temp5), TGSI_SWIZZLE_Y));
 183    ureg_MAD(ureg, temp1,
 184             ureg_scalar(coords, TGSI_SWIZZLE_X),
 185             ureg_scalar(ureg_src(temp5), TGSI_SWIZZLE_X),
 186             ureg_src(temp0));
 187    ureg_ADD(ureg, temp1,
 188             ureg_src(temp1), ureg_src(temp1));
 189    ureg_MUL(ureg, temp3,
 190             ureg_scalar(ureg_src(temp5), TGSI_SWIZZLE_Y),
 191             ureg_scalar(ureg_src(temp5), TGSI_SWIZZLE_Y));
 192    ureg_MAD(ureg, temp4,
 193             ureg_scalar(ureg_src(temp5), TGSI_SWIZZLE_X),
 194             ureg_scalar(ureg_src(temp5), TGSI_SWIZZLE_X),
 195             ureg_src(temp3));
 196    ureg_MOV(ureg, temp4, ureg_negate(ureg_src(temp4)));
 197    ureg_MUL(ureg, temp2,
 198             ureg_scalar(coords, TGSI_SWIZZLE_Z),
 199             ureg_src(temp4));
 200    ureg_MUL(ureg, temp0,
 201             ureg_scalar(const0124, TGSI_SWIZZLE_W),
 202             ureg_src(temp2));
 203    ureg_MUL(ureg, temp3,
 204             ureg_src(temp1), ureg_src(temp1));
 205    ureg_SUB(ureg, temp2,
 206             ureg_src(temp3), ureg_src(temp0));
 207    ureg_RSQ(ureg, temp2, ureg_abs(ureg_src(temp2)));
 208    ureg_RCP(ureg, temp2, ureg_src(temp2));
 209    ureg_SUB(ureg, temp1,
 210             ureg_src(temp2), ureg_src(temp1));
 211    ureg_ADD(ureg, temp0,
 212             ureg_scalar(coords, TGSI_SWIZZLE_Z),
 213             ureg_scalar(coords, TGSI_SWIZZLE_Z));
 214    ureg_RCP(ureg, temp0, ureg_src(temp0));
 215    ureg_MUL(ureg, temp2,
 216             ureg_src(temp1), ureg_src(temp0));
 217    ureg_TEX(ureg, out, TGSI_TEXTURE_1D,
 218             ureg_src(temp2), sampler);
 219
 220    ureg_release_temporary(ureg, temp0);
 221    ureg_release_temporary(ureg, temp1);
 222    ureg_release_temporary(ureg, temp2);
 223    ureg_release_temporary(ureg, temp3);
 224    ureg_release_temporary(ureg, temp4);
 225    ureg_release_temporary(ureg, temp5);
 226 }
 227
 228 static void *
 229 create_vs(struct pipe_context *pipe,
 230           unsigned vs_traits)
 231 {
 232    struct ureg_program *ureg;
 233    struct ureg_src src;
 234    struct ureg_dst dst;
 235    struct ureg_src const0, const1;
 236    boolean is_fill = vs_traits & VS_FILL;
 237    boolean is_composite = vs_traits & VS_COMPOSITE;
 238    boolean has_mask = vs_traits & VS_MASK;
 239    boolean is_yuv = vs_traits & VS_YUV;
 240    unsigned input_slot = 0;
 241
 242    ureg = ureg_create(TGSI_PROCESSOR_VERTEX);
 243    if (ureg == NULL)
 244       return 0;
 245
 246    const0 = ureg_DECL_constant(ureg, 0);
 247    const1 = ureg_DECL_constant(ureg, 1);
 248
 249    /* it has to be either a fill or a composite op */
 250    debug_assert(is_fill ^ is_composite);
 251
 252    src = ureg_DECL_vs_input(ureg, input_slot++);
 253    dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
 254    src = vs_normalize_coords(ureg, src,
 255                              const0, const1);
 256    ureg_MOV(ureg, dst, src);
 257
 258    if (is_yuv) {
 259       src = ureg_DECL_vs_input(ureg, input_slot++);
 260       dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_GENERIC, 0);
 261       ureg_MOV(ureg, dst, src);
 262
 263       src = ureg_DECL_vs_input(ureg, input_slot++);
 264       dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_GENERIC, 1);
 265       ureg_MOV(ureg, dst, src);
 266
 267       src = ureg_DECL_vs_input(ureg, input_slot++);
 268       dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_GENERIC, 2);
 269       ureg_MOV(ureg, dst, src);
 270    }
 271
 272    if (is_composite) {
 273       src = ureg_DECL_vs_input(ureg, input_slot++);
 274       dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_GENERIC, 0);
 275       ureg_MOV(ureg, dst, src);
 276    }
 277
 278    if (is_fill) {
 279       src = ureg_DECL_vs_input(ureg, input_slot++);
 280       dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
 281       ureg_MOV(ureg, dst, src);
 282    }
 283
 284    if (has_mask) {
 285       src = ureg_DECL_vs_input(ureg, input_slot++);
 286       dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_GENERIC, 1);
 287       ureg_MOV(ureg, dst, src);
 288    }
 289
 290    ureg_END(ureg);
 291
 292    return ureg_create_shader_and_destroy(ureg, pipe);
 293 }
 294
 295 static void *
 296 create_yuv_shader(struct pipe_context *pipe, struct ureg_program *ureg)
 297 {
 298    struct ureg_src y_sampler, u_sampler, v_sampler;
 299    struct ureg_src pos;
 300    struct ureg_src matrow0, matrow1, matrow2;
 301    struct ureg_dst y, u, v, rgb;
 302    struct ureg_dst out = ureg_DECL_output(ureg,
 303                                           TGSI_SEMANTIC_COLOR,
 304                                           0);
 305
 306    pos = ureg_DECL_fs_input(ureg,
 307                             TGSI_SEMANTIC_GENERIC,
 308                             0,
 309                             TGSI_INTERPOLATE_PERSPECTIVE);
 310
 311    rgb = ureg_DECL_temporary(ureg);
 312    y = ureg_DECL_temporary(ureg);
 313    u = ureg_DECL_temporary(ureg);
 314    v = ureg_DECL_temporary(ureg);
 315
 316    y_sampler = ureg_DECL_sampler(ureg, 0);
 317    u_sampler = ureg_DECL_sampler(ureg, 1);
 318    v_sampler = ureg_DECL_sampler(ureg, 2);
 319
 320    matrow0 = ureg_DECL_constant(ureg, 0);
 321    matrow1 = ureg_DECL_constant(ureg, 1);
 322    matrow2 = ureg_DECL_constant(ureg, 2);
 323
 324    ureg_TEX(ureg, y,
 325             TGSI_TEXTURE_2D, pos, y_sampler);
 326    ureg_TEX(ureg, u,
 327             TGSI_TEXTURE_2D, pos, u_sampler);
 328    ureg_TEX(ureg, v,
 329             TGSI_TEXTURE_2D, pos, v_sampler);
 330
 331    ureg_MUL(ureg, rgb,
 332             ureg_scalar(ureg_src(y), TGSI_SWIZZLE_X),
 333             matrow0);
 334    ureg_MAD(ureg, rgb,
 335             ureg_scalar(ureg_src(u), TGSI_SWIZZLE_X),
 336             matrow1,
 337             ureg_src(rgb));
 338    ureg_MAD(ureg, rgb,
 339             ureg_scalar(ureg_src(v), TGSI_SWIZZLE_X),
 340             matrow2,
 341             ureg_src(rgb));
 342
 343    /* rgb.a = 1; */
 344    ureg_MOV(ureg, ureg_writemask(rgb, TGSI_WRITEMASK_W),
 345             ureg_scalar(matrow0, TGSI_SWIZZLE_X));
 346
 347    ureg_MOV(ureg, out, ureg_src(rgb));
 348
 349    ureg_release_temporary(ureg, rgb);
 350    ureg_release_temporary(ureg, y);
 351    ureg_release_temporary(ureg, u);
 352    ureg_release_temporary(ureg, v);
 353
 354    ureg_END(ureg);
 355
 356    return ureg_create_shader_and_destroy(ureg, pipe);
 357 }
 358
 359 static void *
 360 create_fs(struct pipe_context *pipe,
 361           unsigned fs_traits)
 362 {
 363    struct ureg_program *ureg;
 364    struct ureg_src /*dst_sampler,*/ src_sampler, mask_sampler;
 365    struct ureg_src /*dst_pos,*/ src_input, mask_pos;
 366    struct ureg_dst src, mask;
 367    struct ureg_dst out;
 368    boolean has_mask = fs_traits & FS_MASK;
 369    boolean is_fill = fs_traits & FS_FILL;
 370    boolean is_composite = fs_traits & FS_COMPOSITE;
 371    boolean is_solid   = fs_traits & FS_SOLID_FILL;
 372    boolean is_lingrad = fs_traits & FS_LINGRAD_FILL;
 373    boolean is_radgrad = fs_traits & FS_RADGRAD_FILL;
 374    unsigned comp_alpha = fs_traits & FS_COMPONENT_ALPHA;
 375    boolean is_yuv = fs_traits & FS_YUV;
 376
 377    ureg = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 378    if (ureg == NULL)
 379       return 0;
 380
 381    /* it has to be either a fill, a composite op or a yuv conversion */
 382    debug_assert((is_fill ^ is_composite) ^ is_yuv);
 383
 384    out = ureg_DECL_output(ureg,
 385                           TGSI_SEMANTIC_COLOR,
 386                           0);
 387
 388    if (is_composite) {
 389       src_sampler = ureg_DECL_sampler(ureg, 0);
 390       src_input = ureg_DECL_fs_input(ureg,
 391                                      TGSI_SEMANTIC_GENERIC,
 392                                      0,
 393                                      TGSI_INTERPOLATE_PERSPECTIVE);
 394    } else if (is_fill) {
 395       if (is_solid)
 396          src_input = ureg_DECL_fs_input(ureg,
 397                                         TGSI_SEMANTIC_COLOR,
 398                                         0,
 399                                         TGSI_INTERPOLATE_PERSPECTIVE);
 400       else
 401          src_input = ureg_DECL_fs_input(ureg,
 402                                         TGSI_SEMANTIC_POSITION,
 403                                         0,
 404                                         TGSI_INTERPOLATE_PERSPECTIVE);
 405    } else {
 406       debug_assert(is_yuv);
 407       return create_yuv_shader(pipe, ureg);
 408    }
 409
 410    if (has_mask) {
 411       mask_sampler = ureg_DECL_sampler(ureg, 1);
 412       mask_pos = ureg_DECL_fs_input(ureg,
 413                                     TGSI_SEMANTIC_GENERIC,
 414                                     1,
 415                                     TGSI_INTERPOLATE_PERSPECTIVE);
 416    }
 417
 418 #if 0  /* unused right now */
 419    dst_sampler = ureg_DECL_sampler(ureg, 2);
 420    dst_pos = ureg_DECL_fs_input(ureg,
 421                                 TGSI_SEMANTIC_POSITION,
 422                                 2,
 423                                 TGSI_INTERPOLATE_PERSPECTIVE);
 424 #endif
 425
 426    if (is_composite) {
 427       if (has_mask)
 428          src = ureg_DECL_temporary(ureg);
 429       else
 430          src = out;
 431       ureg_TEX(ureg, src,
 432                TGSI_TEXTURE_2D, src_input, src_sampler);
 433    } else if (is_fill) {
 434       if (is_solid) {
 435          if (has_mask)
 436             src = ureg_dst(src_input);
 437          else
 438             ureg_MOV(ureg, out, src_input);
 439       } else if (is_lingrad || is_radgrad) {
 440          struct ureg_src coords, const0124,
 441             matrow0, matrow1, matrow2;
 442
 443          if (has_mask)
 444             src = ureg_DECL_temporary(ureg);
 445          else
 446             src = out;
 447
 448          coords = ureg_DECL_constant(ureg, 0);
 449          const0124 = ureg_DECL_constant(ureg, 1);
 450          matrow0 = ureg_DECL_constant(ureg, 2);
 451          matrow1 = ureg_DECL_constant(ureg, 3);
 452          matrow2 = ureg_DECL_constant(ureg, 4);
 453
 454          if (is_lingrad) {
 455             linear_gradient(ureg, src,
 456                             src_input, src_sampler,
 457                             coords, const0124,
 458                             matrow0, matrow1, matrow2);
 459          } else if (is_radgrad) {
 460             radial_gradient(ureg, src,
 461                             src_input, src_sampler,
 462                             coords, const0124,
 463                             matrow0, matrow1, matrow2);
 464          }
 465       } else
 466          debug_assert(!"Unknown fill type!");
 467    }
 468
 469    if (has_mask) {
 470       mask = ureg_DECL_temporary(ureg);
 471       ureg_TEX(ureg, mask,
 472                TGSI_TEXTURE_2D, mask_pos, mask_sampler);
 473       /* src IN mask */
 474       src_in_mask(ureg, out, ureg_src(src), ureg_src(mask), comp_alpha);
 475       ureg_release_temporary(ureg, mask);
 476    }
 477
 478    ureg_END(ureg);
 479
 480    return ureg_create_shader_and_destroy(ureg, pipe);
 481 }
 482
 483 struct xorg_shaders * xorg_shaders_create(struct xorg_renderer *r)
 484 {
 485    struct xorg_shaders *sc = CALLOC_STRUCT(xorg_shaders);
 486
 487    sc->r = r;
 488    sc->vs_hash = cso_hash_create();
 489    sc->fs_hash = cso_hash_create();
 490
 491    return sc;
 492 }
 493
 494 static void
 495 cache_destroy(struct cso_context *cso,
 496               struct cso_hash *hash,
 497               unsigned processor)
 498 {
 499    struct cso_hash_iter iter = cso_hash_first_node(hash);
 500    while (!cso_hash_iter_is_null(iter)) {
 501       void *shader = (void *)cso_hash_iter_data(iter);
 502       if (processor == PIPE_SHADER_FRAGMENT) {
 503          cso_delete_fragment_shader(cso, shader);
 504       } else if (processor == PIPE_SHADER_VERTEX) {
 505          cso_delete_vertex_shader(cso, shader);
 506       }
 507       iter = cso_hash_erase(hash, iter);
 508    }
 509    cso_hash_delete(hash);
 510 }
 511
 512 void xorg_shaders_destroy(struct xorg_shaders *sc)
 513 {
 514    cache_destroy(sc->r->cso, sc->vs_hash,
 515                  PIPE_SHADER_VERTEX);
 516    cache_destroy(sc->r->cso, sc->fs_hash,
 517                  PIPE_SHADER_FRAGMENT);
 518
 519    free(sc);
 520 }
 521
 522 static INLINE void *
 523 shader_from_cache(struct pipe_context *pipe,
 524                   unsigned type,
 525                   struct cso_hash *hash,
 526                   unsigned key)
 527 {
 528    void *shader = 0;
 529
 530    struct cso_hash_iter iter = cso_hash_find(hash, key);
 531
 532    if (cso_hash_iter_is_null(iter)) {
 533       if (type == PIPE_SHADER_VERTEX)
 534          shader = create_vs(pipe, key);
 535       else
 536          shader = create_fs(pipe, key);
 537       cso_hash_insert(hash, key, shader);
 538    } else
 539       shader = (void *)cso_hash_iter_data(iter);
 540
 541    return shader;
 542 }
 543
 544 struct xorg_shader xorg_shaders_get(struct xorg_shaders *sc,
 545                                     unsigned vs_traits,
 546                                     unsigned fs_traits)
 547 {
 548    struct xorg_shader shader = { NULL, NULL };
 549    void *vs, *fs;
 550
 551    vs = shader_from_cache(sc->r->pipe, PIPE_SHADER_VERTEX,
 552                           sc->vs_hash, vs_traits);
 553    fs = shader_from_cache(sc->r->pipe, PIPE_SHADER_FRAGMENT,
 554                           sc->fs_hash, fs_traits);
 555
 556    debug_assert(vs && fs);
 557    if (!vs || !fs)
 558       return shader;
 559
 560    shader.vs = vs;
 561    shader.fs = fs;
 562
 563    return shader;
 564 }