src/gallium/auxiliary/util/u_simple_shaders.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   4  * All Rights Reserved.
   5  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * 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
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 /**
  30  * @file
  31  * Simple vertex/fragment shader generators.
  32  *
  33  * @author Brian Paul
  34            Marek Olšák
  35  */
  36
  37
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_shader_tokens.h"
  40 #include "pipe/p_state.h"
  41 #include "util/u_simple_shaders.h"
  42 #include "util/u_debug.h"
  43 #include "util/u_memory.h"
  44 #include "util/u_string.h"
  45 #include "tgsi/tgsi_dump.h"
  46 #include "tgsi/tgsi_strings.h"
  47 #include "tgsi/tgsi_ureg.h"
  48 #include "tgsi/tgsi_text.h"
  49 #include <stdio.h> /* include last */
  50
  51
  52
  53 /**
  54  * Make simple vertex pass-through shader.
  55  * \param num_attribs  number of attributes to pass through
  56  * \param semantic_names  array of semantic names for each attribute
  57  * \param semantic_indexes  array of semantic indexes for each attribute
  58  */
  59 void *
  60 util_make_vertex_passthrough_shader(struct pipe_context *pipe,
  61                                     uint num_attribs,
  62                                     const enum tgsi_semantic *semantic_names,
  63                                     const uint *semantic_indexes,
  64                                     bool window_space)
  65 {
  66    return util_make_vertex_passthrough_shader_with_so(pipe, num_attribs,
  67                                                       semantic_names,
  68                                                       semantic_indexes,
  69                                                       window_space, false, NULL);
  70 }
  71
  72 void *
  73 util_make_vertex_passthrough_shader_with_so(struct pipe_context *pipe,
  74                                     uint num_attribs,
  75                                     const enum tgsi_semantic *semantic_names,
  76                                     const uint *semantic_indexes,
  77                                     bool window_space, bool layered,
  78                                     const struct pipe_stream_output_info *so)
  79 {
  80    struct ureg_program *ureg;
  81    uint i;
  82
  83    ureg = ureg_create( PIPE_SHADER_VERTEX );
  84    if (!ureg)
  85       return NULL;
  86
  87    if (window_space)
  88       ureg_property(ureg, TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION, TRUE);
  89
  90    for (i = 0; i < num_attribs; i++) {
  91       struct ureg_src src;
  92       struct ureg_dst dst;
  93
  94       src = ureg_DECL_vs_input( ureg, i );
  95
  96       dst = ureg_DECL_output( ureg,
  97                               semantic_names[i],
  98                               semantic_indexes[i]);
  99
 100       ureg_MOV( ureg, dst, src );
 101    }
 102
 103    if (layered) {
 104       struct ureg_src instance_id =
 105          ureg_DECL_system_value(ureg, TGSI_SEMANTIC_INSTANCEID, 0);
 106       struct ureg_dst layer = ureg_DECL_output(ureg, TGSI_SEMANTIC_LAYER, 0);
 107
 108       ureg_MOV(ureg, ureg_writemask(layer, TGSI_WRITEMASK_X),
 109                ureg_scalar(instance_id, TGSI_SWIZZLE_X));
 110    }
 111
 112    ureg_END( ureg );
 113
 114    return ureg_create_shader_with_so_and_destroy( ureg, pipe, so );
 115 }
 116
 117
 118 void *util_make_layered_clear_vertex_shader(struct pipe_context *pipe)
 119 {
 120    const enum tgsi_semantic semantic_names[] = {TGSI_SEMANTIC_POSITION,
 121                                                 TGSI_SEMANTIC_GENERIC};
 122    const unsigned semantic_indices[] = {0, 0};
 123
 124    return util_make_vertex_passthrough_shader_with_so(pipe, 2, semantic_names,
 125                                                       semantic_indices, false,
 126                                                       true, NULL);
 127 }
 128
 129 /**
 130  * Takes position and color, and outputs position, color, and instance id.
 131  */
 132 void *util_make_layered_clear_helper_vertex_shader(struct pipe_context *pipe)
 133 {
 134    static const char text[] =
 135          "VERT\n"
 136          "DCL IN[0]\n"
 137          "DCL IN[1]\n"
 138          "DCL SV[0], INSTANCEID\n"
 139          "DCL OUT[0], POSITION\n"
 140          "DCL OUT[1], GENERIC[0]\n"
 141          "DCL OUT[2], GENERIC[1]\n"
 142
 143          "MOV OUT[0], IN[0]\n"
 144          "MOV OUT[1], IN[1]\n"
 145          "MOV OUT[2].x, SV[0].xxxx\n"
 146          "END\n";
 147    struct tgsi_token tokens[1000];
 148    struct pipe_shader_state state;
 149
 150    if (!tgsi_text_translate(text, tokens, ARRAY_SIZE(tokens))) {
 151       assert(0);
 152       return NULL;
 153    }
 154    pipe_shader_state_from_tgsi(&state, tokens);
 155    return pipe->create_vs_state(pipe, &state);
 156 }
 157
 158 /**
 159  * Takes position, color, and target layer, and emits vertices on that target
 160  * layer, with the specified color.
 161  */
 162 void *util_make_layered_clear_geometry_shader(struct pipe_context *pipe)
 163 {
 164    static const char text[] =
 165       "GEOM\n"
 166       "PROPERTY GS_INPUT_PRIMITIVE TRIANGLES\n"
 167       "PROPERTY GS_OUTPUT_PRIMITIVE TRIANGLE_STRIP\n"
 168       "PROPERTY GS_MAX_OUTPUT_VERTICES 3\n"
 169       "PROPERTY GS_INVOCATIONS 1\n"
 170       "DCL IN[][0], POSITION\n" /* position */
 171       "DCL IN[][1], GENERIC[0]\n" /* color */
 172       "DCL IN[][2], GENERIC[1]\n" /* vs invocation */
 173       "DCL OUT[0], POSITION\n"
 174       "DCL OUT[1], GENERIC[0]\n"
 175       "DCL OUT[2], LAYER\n"
 176       "IMM[0] INT32 {0, 0, 0, 0}\n"
 177
 178       "MOV OUT[0], IN[0][0]\n"
 179       "MOV OUT[1], IN[0][1]\n"
 180       "MOV OUT[2].x, IN[0][2].xxxx\n"
 181       "EMIT IMM[0].xxxx\n"
 182       "MOV OUT[0], IN[1][0]\n"
 183       "MOV OUT[1], IN[1][1]\n"
 184       "MOV OUT[2].x, IN[1][2].xxxx\n"
 185       "EMIT IMM[0].xxxx\n"
 186       "MOV OUT[0], IN[2][0]\n"
 187       "MOV OUT[1], IN[2][1]\n"
 188       "MOV OUT[2].x, IN[2][2].xxxx\n"
 189       "EMIT IMM[0].xxxx\n"
 190       "END\n";
 191    struct tgsi_token tokens[1000];
 192    struct pipe_shader_state state;
 193
 194    if (!tgsi_text_translate(text, tokens, ARRAY_SIZE(tokens))) {
 195       assert(0);
 196       return NULL;
 197    }
 198    pipe_shader_state_from_tgsi(&state, tokens);
 199    return pipe->create_gs_state(pipe, &state);
 200 }
 201
 202 static void
 203 ureg_load_tex(struct ureg_program *ureg, struct ureg_dst out,
 204               struct ureg_src coord, struct ureg_src sampler,
 205               enum tgsi_texture_type tex_target,
 206               bool load_level_zero, bool use_txf)
 207 {
 208    if (use_txf) {
 209       struct ureg_dst temp = ureg_DECL_temporary(ureg);
 210
 211       ureg_F2I(ureg, temp, coord);
 212
 213       if (load_level_zero)
 214          ureg_TXF_LZ(ureg, out, tex_target, ureg_src(temp), sampler);
 215       else
 216          ureg_TXF(ureg, out, tex_target, ureg_src(temp), sampler);
 217    } else {
 218       if (load_level_zero)
 219          ureg_TEX_LZ(ureg, out, tex_target, coord, sampler);
 220       else
 221          ureg_TEX(ureg, out, tex_target, coord, sampler);
 222    }
 223 }
 224
 225 /**
 226  * Make simple fragment texture shader, with xrbias->float conversion:
 227  *  IMM {1023/510, -384/510, 0, 1}
 228  *  TEX TEMP[0], IN[0], SAMP[0], 2D;
 229  *  MAD TEMP[0].xyz TEMP[0], IMM[0].xxxx, IMM[0].yyyy
 230  *  MOV OUT[0], TEMP[0]
 231  *  END;
 232  *
 233  * \param tex_target  one of PIPE_TEXTURE_x
 234  */
 235 void *
 236 util_make_fragment_tex_shader_xrbias(struct pipe_context *pipe,
 237                                      enum tgsi_texture_type tex_target)
 238 {
 239    struct ureg_program *ureg;
 240    struct ureg_src sampler;
 241    struct ureg_src coord;
 242    struct ureg_dst temp;
 243    struct ureg_dst out;
 244    struct ureg_src imm;
 245    enum tgsi_return_type stype = TGSI_RETURN_TYPE_FLOAT;
 246
 247    ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 248    if (!ureg)
 249       return NULL;
 250
 251    imm = ureg_imm4f(ureg, 1023.0f/510.0f, -384.0f/510.0f, 0.0f, 1.0f);
 252    sampler = ureg_DECL_sampler(ureg, 0);
 253    ureg_DECL_sampler_view(ureg, 0, tex_target, stype, stype, stype, stype);
 254    coord = ureg_DECL_fs_input(ureg,
 255                               TGSI_SEMANTIC_GENERIC, 0,
 256                               TGSI_INTERPOLATE_LINEAR);
 257    out = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
 258    temp = ureg_DECL_temporary(ureg);
 259
 260    ureg_TEX(ureg, temp, tex_target, coord, sampler);
 261    ureg_MAD(ureg, ureg_writemask(temp, TGSI_WRITEMASK_XYZ),
 262             ureg_src(temp),
 263             ureg_scalar(imm, TGSI_SWIZZLE_X),
 264             ureg_scalar(imm, TGSI_SWIZZLE_Y));
 265    ureg_MOV(ureg, out, ureg_src(temp));
 266    ureg_END(ureg);
 267
 268    return ureg_create_shader_and_destroy(ureg, pipe);
 269 }
 270
 271
 272 /**
 273  * Make simple fragment texture shader:
 274  *  IMM {0,0,0,1}                         // (if writemask != 0xf)
 275  *  MOV TEMP[0], IMM[0]                   // (if writemask != 0xf)
 276  *  TEX TEMP[0].writemask, IN[0], SAMP[0], 2D;
 277  *   .. optional SINT <-> UINT clamping ..
 278  *  MOV OUT[0], TEMP[0]
 279  *  END;
 280  *
 281  * \param tex_target  one of TGSI_TEXTURE_x
 282  * \parma interp_mode  either TGSI_INTERPOLATE_LINEAR or PERSPECTIVE
 283  * \param writemask  mask of TGSI_WRITEMASK_x
 284  */
 285 void *
 286 util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
 287                                         enum tgsi_texture_type tex_target,
 288                                         enum tgsi_interpolate_mode interp_mode,
 289                                         unsigned writemask,
 290                                         enum tgsi_return_type stype,
 291                                         enum tgsi_return_type dtype,
 292                                         bool load_level_zero,
 293                                         bool use_txf)
 294 {
 295    struct ureg_program *ureg;
 296    struct ureg_src sampler;
 297    struct ureg_src tex;
 298    struct ureg_dst temp;
 299    struct ureg_dst out;
 300
 301    assert((stype == TGSI_RETURN_TYPE_FLOAT) == (dtype == TGSI_RETURN_TYPE_FLOAT));
 302    assert(interp_mode == TGSI_INTERPOLATE_LINEAR ||
 303           interp_mode == TGSI_INTERPOLATE_PERSPECTIVE);
 304
 305    ureg = ureg_create( PIPE_SHADER_FRAGMENT );
 306    if (!ureg)
 307       return NULL;
 308
 309    sampler = ureg_DECL_sampler( ureg, 0 );
 310
 311    ureg_DECL_sampler_view(ureg, 0, tex_target, stype, stype, stype, stype);
 312
 313    tex = ureg_DECL_fs_input( ureg,
 314                              TGSI_SEMANTIC_GENERIC, 0,
 315                              interp_mode );
 316
 317    out = ureg_DECL_output( ureg,
 318                            TGSI_SEMANTIC_COLOR,
 319                            0 );
 320
 321    temp = ureg_DECL_temporary(ureg);
 322
 323    if (writemask != TGSI_WRITEMASK_XYZW) {
 324       struct ureg_src imm = ureg_imm4f( ureg, 0, 0, 0, 1 );
 325
 326       ureg_MOV(ureg, temp, imm);
 327    }
 328
 329    if (tex_target == TGSI_TEXTURE_BUFFER)
 330       ureg_TXF(ureg,
 331                ureg_writemask(temp, writemask),
 332                tex_target, tex, sampler);
 333    else
 334       ureg_load_tex(ureg, ureg_writemask(temp, writemask), tex, sampler,
 335                     tex_target, load_level_zero, use_txf);
 336
 337    if (stype != dtype) {
 338       if (stype == TGSI_RETURN_TYPE_SINT) {
 339          assert(dtype == TGSI_RETURN_TYPE_UINT);
 340
 341          ureg_IMAX(ureg, temp, ureg_src(temp), ureg_imm1i(ureg, 0));
 342       } else {
 343          assert(stype == TGSI_RETURN_TYPE_UINT);
 344          assert(dtype == TGSI_RETURN_TYPE_SINT);
 345
 346          ureg_UMIN(ureg, temp, ureg_src(temp), ureg_imm1u(ureg, (1u << 31) - 1));
 347       }
 348    }
 349
 350    ureg_MOV(ureg, out, ureg_src(temp));
 351
 352    ureg_END( ureg );
 353
 354    return ureg_create_shader_and_destroy( ureg, pipe );
 355 }
 356
 357
 358 /**
 359  * Make a simple fragment shader that sets the output color to a color
 360  * taken from a texture.
 361  * \param tex_target  one of TGSI_TEXTURE_x
 362  */
 363 void *
 364 util_make_fragment_tex_shader(struct pipe_context *pipe,
 365                               enum tgsi_texture_type tex_target,
 366                               enum tgsi_interpolate_mode interp_mode,
 367                               enum tgsi_return_type stype,
 368                               enum tgsi_return_type dtype,
 369                               bool load_level_zero,
 370                               bool use_txf)
 371 {
 372    return util_make_fragment_tex_shader_writemask( pipe,
 373                                                    tex_target,
 374                                                    interp_mode,
 375                                                    TGSI_WRITEMASK_XYZW,
 376                                                    stype, dtype, load_level_zero,
 377                                                    use_txf);
 378 }
 379
 380
 381 /**
 382  * Make a simple fragment texture shader which reads the texture unit 0 and 1
 383  * and writes it as depth and stencil, respectively.
 384  */
 385 void *
 386 util_make_fs_blit_zs(struct pipe_context *pipe, unsigned zs_mask,
 387                      enum tgsi_texture_type tex_target,
 388                      bool load_level_zero, bool use_txf)
 389 {
 390    struct ureg_program *ureg;
 391    struct ureg_src depth_sampler, stencil_sampler, coord;
 392    struct ureg_dst depth, stencil, tmp;
 393
 394    ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 395    if (!ureg)
 396       return NULL;
 397
 398    coord = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_GENERIC, 0,
 399                               TGSI_INTERPOLATE_LINEAR);
 400    tmp = ureg_DECL_temporary(ureg);
 401
 402    if (zs_mask & PIPE_MASK_Z) {
 403       depth_sampler = ureg_DECL_sampler(ureg, 0);
 404       ureg_DECL_sampler_view(ureg, 0, tex_target,
 405                              TGSI_RETURN_TYPE_FLOAT,
 406                              TGSI_RETURN_TYPE_FLOAT,
 407                              TGSI_RETURN_TYPE_FLOAT,
 408                              TGSI_RETURN_TYPE_FLOAT);
 409
 410       ureg_load_tex(ureg, ureg_writemask(tmp, TGSI_WRITEMASK_X), coord,
 411                     depth_sampler, tex_target, load_level_zero, use_txf);
 412
 413       depth = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
 414       ureg_MOV(ureg, ureg_writemask(depth, TGSI_WRITEMASK_Z),
 415                ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X));
 416    }
 417
 418    if (zs_mask & PIPE_MASK_S) {
 419       stencil_sampler = ureg_DECL_sampler(ureg, zs_mask & PIPE_MASK_Z ? 1 : 0);
 420       ureg_DECL_sampler_view(ureg, 0, tex_target,
 421                              TGSI_RETURN_TYPE_UINT,
 422                              TGSI_RETURN_TYPE_UINT,
 423                              TGSI_RETURN_TYPE_UINT,
 424                              TGSI_RETURN_TYPE_UINT);
 425
 426       ureg_load_tex(ureg, ureg_writemask(tmp, TGSI_WRITEMASK_X), coord,
 427                     stencil_sampler, tex_target, load_level_zero, use_txf);
 428
 429       stencil = ureg_DECL_output(ureg, TGSI_SEMANTIC_STENCIL, 0);
 430       ureg_MOV(ureg, ureg_writemask(stencil, TGSI_WRITEMASK_Y),
 431                ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X));
 432    }
 433
 434    ureg_END(ureg);
 435
 436    return ureg_create_shader_and_destroy(ureg, pipe);
 437 }
 438
 439
 440 /**
 441  * Make simple fragment color pass-through shader that replicates OUT[0]
 442  * to all bound colorbuffers.
 443  */
 444 void *
 445 util_make_fragment_passthrough_shader(struct pipe_context *pipe,
 446                                       int input_semantic,
 447                                       int input_interpolate,
 448                                       boolean write_all_cbufs)
 449 {
 450    static const char shader_templ[] =
 451          "FRAG\n"
 452          "%s"
 453          "DCL IN[0], %s[0], %s\n"
 454          "DCL OUT[0], COLOR[0]\n"
 455
 456          "MOV OUT[0], IN[0]\n"
 457          "END\n";
 458
 459    char text[sizeof(shader_templ)+100];
 460    struct tgsi_token tokens[1000];
 461    struct pipe_shader_state state;
 462
 463    sprintf(text, shader_templ,
 464            write_all_cbufs ? "PROPERTY FS_COLOR0_WRITES_ALL_CBUFS 1\n" : "",
 465            tgsi_semantic_names[input_semantic],
 466            tgsi_interpolate_names[input_interpolate]);
 467
 468    if (!tgsi_text_translate(text, tokens, ARRAY_SIZE(tokens))) {
 469       assert(0);
 470       return NULL;
 471    }
 472    pipe_shader_state_from_tgsi(&state, tokens);
 473 #if 0
 474    tgsi_dump(state.tokens, 0);
 475 #endif
 476
 477    return pipe->create_fs_state(pipe, &state);
 478 }
 479
 480
 481 void *
 482 util_make_empty_fragment_shader(struct pipe_context *pipe)
 483 {
 484    struct ureg_program *ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 485    if (!ureg)
 486       return NULL;
 487
 488    ureg_END(ureg);
 489    return ureg_create_shader_and_destroy(ureg, pipe);
 490 }
 491
 492
 493 /**
 494  * Make a fragment shader that copies the input color to N output colors.
 495  */
 496 void *
 497 util_make_fragment_cloneinput_shader(struct pipe_context *pipe, int num_cbufs,
 498                                      int input_semantic,
 499                                      int input_interpolate)
 500 {
 501    struct ureg_program *ureg;
 502    struct ureg_src src;
 503    struct ureg_dst dst[PIPE_MAX_COLOR_BUFS];
 504    int i;
 505
 506    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 507
 508    ureg = ureg_create( PIPE_SHADER_FRAGMENT );
 509    if (!ureg)
 510       return NULL;
 511
 512    src = ureg_DECL_fs_input( ureg, input_semantic, 0,
 513                              input_interpolate );
 514
 515    for (i = 0; i < num_cbufs; i++)
 516       dst[i] = ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, i );
 517
 518    for (i = 0; i < num_cbufs; i++)
 519       ureg_MOV( ureg, dst[i], src );
 520
 521    ureg_END( ureg );
 522
 523    return ureg_create_shader_and_destroy( ureg, pipe );
 524 }
 525
 526
 527 static void *
 528 util_make_fs_blit_msaa_gen(struct pipe_context *pipe,
 529                            enum tgsi_texture_type tgsi_tex,
 530                            const char *samp_type,
 531                            const char *output_semantic,
 532                            const char *output_mask,
 533                            const char *conversion_decl,
 534                            const char *conversion)
 535 {
 536    static const char shader_templ[] =
 537          "FRAG\n"
 538          "DCL IN[0], GENERIC[0], LINEAR\n"
 539          "DCL SAMP[0]\n"
 540          "DCL SVIEW[0], %s, %s\n"
 541          "DCL OUT[0], %s\n"
 542          "DCL TEMP[0]\n"
 543          "%s"
 544
 545          "F2U TEMP[0], IN[0]\n"
 546          "TXF TEMP[0], TEMP[0], SAMP[0], %s\n"
 547          "%s"
 548          "MOV OUT[0]%s, TEMP[0]\n"
 549          "END\n";
 550
 551    const char *type = tgsi_texture_names[tgsi_tex];
 552    char text[sizeof(shader_templ)+100];
 553    struct tgsi_token tokens[1000];
 554    struct pipe_shader_state state;
 555
 556    assert(tgsi_tex == TGSI_TEXTURE_2D_MSAA ||
 557           tgsi_tex == TGSI_TEXTURE_2D_ARRAY_MSAA);
 558
 559    util_snprintf(text, sizeof(text), shader_templ, type, samp_type,
 560                  output_semantic, conversion_decl, type, conversion, output_mask);
 561
 562    if (!tgsi_text_translate(text, tokens, ARRAY_SIZE(tokens))) {
 563       puts(text);
 564       assert(0);
 565       return NULL;
 566    }
 567    pipe_shader_state_from_tgsi(&state, tokens);
 568 #if 0
 569    tgsi_dump(state.tokens, 0);
 570 #endif
 571
 572    return pipe->create_fs_state(pipe, &state);
 573 }
 574
 575
 576 /**
 577  * Make a fragment shader that sets the output color to a color
 578  * fetched from a multisample texture.
 579  * \param tex_target  one of PIPE_TEXTURE_x
 580  */
 581 void *
 582 util_make_fs_blit_msaa_color(struct pipe_context *pipe,
 583                              enum tgsi_texture_type tgsi_tex,
 584                              enum tgsi_return_type stype,
 585                              enum tgsi_return_type dtype)
 586 {
 587    const char *samp_type;
 588    const char *conversion_decl = "";
 589    const char *conversion = "";
 590
 591    if (stype == TGSI_RETURN_TYPE_UINT) {
 592       samp_type = "UINT";
 593
 594       if (dtype == TGSI_RETURN_TYPE_SINT) {
 595          conversion_decl = "IMM[0] UINT32 {2147483647, 0, 0, 0}\n";
 596          conversion = "UMIN TEMP[0], TEMP[0], IMM[0].xxxx\n";
 597       }
 598    } else if (stype == TGSI_RETURN_TYPE_SINT) {
 599       samp_type = "SINT";
 600
 601       if (dtype == TGSI_RETURN_TYPE_UINT) {
 602          conversion_decl = "IMM[0] INT32 {0, 0, 0, 0}\n";
 603          conversion = "IMAX TEMP[0], TEMP[0], IMM[0].xxxx\n";
 604       }
 605    } else {
 606       assert(dtype == TGSI_RETURN_TYPE_FLOAT);
 607       samp_type = "FLOAT";
 608    }
 609
 610    return util_make_fs_blit_msaa_gen(pipe, tgsi_tex, samp_type,
 611                                      "COLOR[0]", "", conversion_decl,
 612                                      conversion);
 613 }
 614
 615
 616 /**
 617  * Make a fragment shader that sets the output depth to a depth value
 618  * fetched from a multisample texture.
 619  * \param tex_target  one of PIPE_TEXTURE_x
 620  */
 621 void *
 622 util_make_fs_blit_msaa_depth(struct pipe_context *pipe,
 623                              enum tgsi_texture_type tgsi_tex)
 624 {
 625    return util_make_fs_blit_msaa_gen(pipe, tgsi_tex, "FLOAT",
 626                                      "POSITION", ".z", "", "");
 627 }
 628
 629
 630 /**
 631  * Make a fragment shader that sets the output stencil to a stencil value
 632  * fetched from a multisample texture.
 633  * \param tex_target  one of PIPE_TEXTURE_x
 634  */
 635 void *
 636 util_make_fs_blit_msaa_stencil(struct pipe_context *pipe,
 637                                enum tgsi_texture_type tgsi_tex)
 638 {
 639    return util_make_fs_blit_msaa_gen(pipe, tgsi_tex, "UINT",
 640                                      "STENCIL", ".y", "", "");
 641 }
 642
 643
 644 /**
 645  * Make a fragment shader that sets the output depth and stencil to depth
 646  * and stencil values fetched from two multisample textures / samplers.
 647  * The sizes of both textures should match (it should be one depth-stencil
 648  * texture).
 649  * \param tex_target  one of PIPE_TEXTURE_x
 650  */
 651 void *
 652 util_make_fs_blit_msaa_depthstencil(struct pipe_context *pipe,
 653                                     enum tgsi_texture_type tgsi_tex)
 654 {
 655    static const char shader_templ[] =
 656          "FRAG\n"
 657          "DCL IN[0], GENERIC[0], LINEAR\n"
 658          "DCL SAMP[0..1]\n"
 659          "DCL SVIEW[0..1], %s, FLOAT\n"
 660          "DCL OUT[0], POSITION\n"
 661          "DCL OUT[1], STENCIL\n"
 662          "DCL TEMP[0]\n"
 663
 664          "F2U TEMP[0], IN[0]\n"
 665          "TXF OUT[0].z, TEMP[0], SAMP[0], %s\n"
 666          "TXF OUT[1].y, TEMP[0], SAMP[1], %s\n"
 667          "END\n";
 668
 669    const char *type = tgsi_texture_names[tgsi_tex];
 670    char text[sizeof(shader_templ)+100];
 671    struct tgsi_token tokens[1000];
 672    struct pipe_shader_state state;
 673
 674    assert(tgsi_tex == TGSI_TEXTURE_2D_MSAA ||
 675           tgsi_tex == TGSI_TEXTURE_2D_ARRAY_MSAA);
 676
 677    sprintf(text, shader_templ, type, type, type);
 678
 679    if (!tgsi_text_translate(text, tokens, ARRAY_SIZE(tokens))) {
 680       assert(0);
 681       return NULL;
 682    }
 683    pipe_shader_state_from_tgsi(&state, tokens);
 684 #if 0
 685    tgsi_dump(state.tokens, 0);
 686 #endif
 687
 688    return pipe->create_fs_state(pipe, &state);
 689 }
 690
 691
 692 void *
 693 util_make_fs_msaa_resolve(struct pipe_context *pipe,
 694                           enum tgsi_texture_type tgsi_tex, unsigned nr_samples,
 695                           enum tgsi_return_type stype)
 696 {
 697    struct ureg_program *ureg;
 698    struct ureg_src sampler, coord;
 699    struct ureg_dst out, tmp_sum, tmp_coord, tmp;
 700    unsigned i;
 701
 702    ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 703    if (!ureg)
 704       return NULL;
 705
 706    /* Declarations. */
 707    sampler = ureg_DECL_sampler(ureg, 0);
 708    ureg_DECL_sampler_view(ureg, 0, tgsi_tex, stype, stype, stype, stype);
 709    coord = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_GENERIC, 0,
 710                               TGSI_INTERPOLATE_LINEAR);
 711    out = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
 712    tmp_sum = ureg_DECL_temporary(ureg);
 713    tmp_coord = ureg_DECL_temporary(ureg);
 714    tmp = ureg_DECL_temporary(ureg);
 715
 716    /* Instructions. */
 717    ureg_MOV(ureg, tmp_sum, ureg_imm1f(ureg, 0));
 718    ureg_F2U(ureg, tmp_coord, coord);
 719
 720    for (i = 0; i < nr_samples; i++) {
 721       /* Read one sample. */
 722       ureg_MOV(ureg, ureg_writemask(tmp_coord, TGSI_WRITEMASK_W),
 723                ureg_imm1u(ureg, i));
 724       ureg_TXF(ureg, tmp, tgsi_tex, ureg_src(tmp_coord), sampler);
 725
 726       if (stype == TGSI_RETURN_TYPE_UINT)
 727          ureg_U2F(ureg, tmp, ureg_src(tmp));
 728       else if (stype == TGSI_RETURN_TYPE_SINT)
 729          ureg_I2F(ureg, tmp, ureg_src(tmp));
 730
 731       /* Add it to the sum.*/
 732       ureg_ADD(ureg, tmp_sum, ureg_src(tmp_sum), ureg_src(tmp));
 733    }
 734
 735    /* Calculate the average and return. */
 736    ureg_MUL(ureg, tmp_sum, ureg_src(tmp_sum),
 737             ureg_imm1f(ureg, 1.0 / nr_samples));
 738
 739    if (stype == TGSI_RETURN_TYPE_UINT)
 740       ureg_F2U(ureg, out, ureg_src(tmp_sum));
 741    else if (stype == TGSI_RETURN_TYPE_SINT)
 742       ureg_F2I(ureg, out, ureg_src(tmp_sum));
 743    else
 744       ureg_MOV(ureg, out, ureg_src(tmp_sum));
 745
 746    ureg_END(ureg);
 747
 748    return ureg_create_shader_and_destroy(ureg, pipe);
 749 }
 750
 751
 752 void *
 753 util_make_fs_msaa_resolve_bilinear(struct pipe_context *pipe,
 754                                    enum tgsi_texture_type tgsi_tex,
 755                                    unsigned nr_samples,
 756                                    enum tgsi_return_type stype)
 757 {
 758    struct ureg_program *ureg;
 759    struct ureg_src sampler, coord;
 760    struct ureg_dst out, tmp, top, bottom;
 761    struct ureg_dst tmp_coord[4], tmp_sum[4];
 762    unsigned i, c;
 763
 764    ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 765    if (!ureg)
 766       return NULL;
 767
 768    /* Declarations. */
 769    sampler = ureg_DECL_sampler(ureg, 0);
 770    ureg_DECL_sampler_view(ureg, 0, tgsi_tex, stype, stype, stype, stype);
 771    coord = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_GENERIC, 0,
 772                               TGSI_INTERPOLATE_LINEAR);
 773    out = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
 774    for (c = 0; c < 4; c++)
 775       tmp_sum[c] = ureg_DECL_temporary(ureg);
 776    for (c = 0; c < 4; c++)
 777       tmp_coord[c] = ureg_DECL_temporary(ureg);
 778    tmp = ureg_DECL_temporary(ureg);
 779    top = ureg_DECL_temporary(ureg);
 780    bottom = ureg_DECL_temporary(ureg);
 781
 782    /* Instructions. */
 783    for (c = 0; c < 4; c++)
 784       ureg_MOV(ureg, tmp_sum[c], ureg_imm1f(ureg, 0));
 785
 786    /* Get 4 texture coordinates for the bilinear filter. */
 787    ureg_F2U(ureg, tmp_coord[0], coord); /* top-left */
 788    ureg_UADD(ureg, tmp_coord[1], ureg_src(tmp_coord[0]),
 789              ureg_imm4u(ureg, 1, 0, 0, 0)); /* top-right */
 790    ureg_UADD(ureg, tmp_coord[2], ureg_src(tmp_coord[0]),
 791              ureg_imm4u(ureg, 0, 1, 0, 0)); /* bottom-left */
 792    ureg_UADD(ureg, tmp_coord[3], ureg_src(tmp_coord[0]),
 793              ureg_imm4u(ureg, 1, 1, 0, 0)); /* bottom-right */
 794
 795    for (i = 0; i < nr_samples; i++) {
 796       for (c = 0; c < 4; c++) {
 797          /* Read one sample. */
 798          ureg_MOV(ureg, ureg_writemask(tmp_coord[c], TGSI_WRITEMASK_W),
 799                   ureg_imm1u(ureg, i));
 800          ureg_TXF(ureg, tmp, tgsi_tex, ureg_src(tmp_coord[c]), sampler);
 801
 802          if (stype == TGSI_RETURN_TYPE_UINT)
 803             ureg_U2F(ureg, tmp, ureg_src(tmp));
 804          else if (stype == TGSI_RETURN_TYPE_SINT)
 805             ureg_I2F(ureg, tmp, ureg_src(tmp));
 806
 807          /* Add it to the sum.*/
 808          ureg_ADD(ureg, tmp_sum[c], ureg_src(tmp_sum[c]), ureg_src(tmp));
 809       }
 810    }
 811
 812    /* Calculate the average. */
 813    for (c = 0; c < 4; c++)
 814       ureg_MUL(ureg, tmp_sum[c], ureg_src(tmp_sum[c]),
 815                ureg_imm1f(ureg, 1.0 / nr_samples));
 816
 817    /* Take the 4 average values and apply a standard bilinear filter. */
 818    ureg_FRC(ureg, tmp, coord);
 819
 820    ureg_LRP(ureg, top,
 821             ureg_scalar(ureg_src(tmp), 0),
 822             ureg_src(tmp_sum[1]),
 823             ureg_src(tmp_sum[0]));
 824
 825    ureg_LRP(ureg, bottom,
 826             ureg_scalar(ureg_src(tmp), 0),
 827             ureg_src(tmp_sum[3]),
 828             ureg_src(tmp_sum[2]));
 829
 830    ureg_LRP(ureg, tmp,
 831             ureg_scalar(ureg_src(tmp), 1),
 832             ureg_src(bottom),
 833             ureg_src(top));
 834
 835    /* Convert to the texture format and return. */
 836    if (stype == TGSI_RETURN_TYPE_UINT)
 837       ureg_F2U(ureg, out, ureg_src(tmp));
 838    else if (stype == TGSI_RETURN_TYPE_SINT)
 839       ureg_F2I(ureg, out, ureg_src(tmp));
 840    else
 841       ureg_MOV(ureg, out, ureg_src(tmp));
 842
 843    ureg_END(ureg);
 844
 845    return ureg_create_shader_and_destroy(ureg, pipe);
 846 }
 847
 848 void *
 849 util_make_geometry_passthrough_shader(struct pipe_context *pipe,
 850                                       uint num_attribs,
 851                                       const ubyte *semantic_names,
 852                                       const ubyte *semantic_indexes)
 853 {
 854    static const unsigned zero[4] = {0, 0, 0, 0};
 855
 856    struct ureg_program *ureg;
 857    struct ureg_dst dst[PIPE_MAX_SHADER_OUTPUTS];
 858    struct ureg_src src[PIPE_MAX_SHADER_INPUTS];
 859    struct ureg_src imm;
 860
 861    unsigned i;
 862
 863    ureg = ureg_create(PIPE_SHADER_GEOMETRY);
 864    if (!ureg)
 865       return NULL;
 866
 867    ureg_property(ureg, TGSI_PROPERTY_GS_INPUT_PRIM, PIPE_PRIM_POINTS);
 868    ureg_property(ureg, TGSI_PROPERTY_GS_OUTPUT_PRIM, PIPE_PRIM_POINTS);
 869    ureg_property(ureg, TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES, 1);
 870    ureg_property(ureg, TGSI_PROPERTY_GS_INVOCATIONS, 1);
 871    imm = ureg_DECL_immediate_uint(ureg, zero, 4);
 872
 873    /**
 874     * Loop over all the attribs and declare the corresponding
 875     * declarations in the geometry shader
 876     */
 877    for (i = 0; i < num_attribs; i++) {
 878       src[i] = ureg_DECL_input(ureg, semantic_names[i],
 879                                semantic_indexes[i], 0, 1);
 880       src[i] = ureg_src_dimension(src[i], 0);
 881       dst[i] = ureg_DECL_output(ureg, semantic_names[i], semantic_indexes[i]);
 882    }
 883
 884    /* MOV dst[i] src[i] */
 885    for (i = 0; i < num_attribs; i++) {
 886       ureg_MOV(ureg, dst[i], src[i]);
 887    }
 888
 889    /* EMIT IMM[0] */
 890    ureg_insn(ureg, TGSI_OPCODE_EMIT, NULL, 0, &imm, 1, 0);
 891
 892    /* END */
 893    ureg_END(ureg);
 894
 895    return ureg_create_shader_and_destroy(ureg, pipe);
 896 }
 897
 898 /**
 899  * Blit from color to ZS or from ZS to color in a manner that is equivalent
 900  * to memcpy.
 901  *
 902  * Color is either R32_UINT (for Z24S8 / S8Z24) or R32G32_UINT (Z32_S8X24).
 903  *
 904  * Depth and stencil samplers are used to load depth and stencil,
 905  * and they are packed and the result is written to a color output.
 906  *   OR
 907  * A color sampler is used to load a color value, which is unpacked and
 908  * written to depth and stencil shader outputs.
 909  */
 910 void *
 911 util_make_fs_pack_color_zs(struct pipe_context *pipe,
 912                            enum tgsi_texture_type tex_target,
 913                            enum pipe_format zs_format,
 914                            bool dst_is_color)
 915 {
 916    struct ureg_program *ureg;
 917    struct ureg_src depth_sampler, stencil_sampler, color_sampler, coord;
 918    struct ureg_dst out, depth, depth_x, stencil, out_depth, out_stencil, color;
 919
 920    assert(zs_format == PIPE_FORMAT_Z24_UNORM_S8_UINT || /* color is R32_UINT */
 921           zs_format == PIPE_FORMAT_S8_UINT_Z24_UNORM || /* color is R32_UINT */
 922           zs_format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT || /* color is R32G32_UINT */
 923           zs_format == PIPE_FORMAT_Z24X8_UNORM || /* color is R32_UINT */
 924           zs_format == PIPE_FORMAT_X8Z24_UNORM); /* color is R32_UINT */
 925
 926    bool has_stencil = zs_format != PIPE_FORMAT_Z24X8_UNORM &&
 927                       zs_format != PIPE_FORMAT_X8Z24_UNORM;
 928    bool is_z24 = zs_format != PIPE_FORMAT_Z32_FLOAT_S8X24_UINT;
 929    bool z24_is_high = zs_format == PIPE_FORMAT_S8_UINT_Z24_UNORM ||
 930                       zs_format == PIPE_FORMAT_X8Z24_UNORM;
 931
 932    ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 933    if (!ureg)
 934       return NULL;
 935
 936    coord = ureg_DECL_fs_input(ureg, TGSI_SEMANTIC_GENERIC, 0,
 937                               TGSI_INTERPOLATE_LINEAR);
 938
 939    if (dst_is_color) {
 940       /* Load depth. */
 941       depth_sampler = ureg_DECL_sampler(ureg, 0);
 942       ureg_DECL_sampler_view(ureg, 0, tex_target,
 943                              TGSI_RETURN_TYPE_FLOAT,
 944                              TGSI_RETURN_TYPE_FLOAT,
 945                              TGSI_RETURN_TYPE_FLOAT,
 946                              TGSI_RETURN_TYPE_FLOAT);
 947
 948       depth = ureg_DECL_temporary(ureg);
 949       depth_x = ureg_writemask(depth, TGSI_WRITEMASK_X);
 950       ureg_load_tex(ureg, depth_x, coord, depth_sampler, tex_target, true, true);
 951
 952       /* Pack to Z24. */
 953       if (is_z24) {
 954          double imm = 0xffffff;
 955          struct ureg_src imm_f64 = ureg_DECL_immediate_f64(ureg, &imm, 2);
 956          struct ureg_dst tmp_xy = ureg_writemask(ureg_DECL_temporary(ureg),
 957                                                  TGSI_WRITEMASK_XY);
 958
 959          ureg_F2D(ureg, tmp_xy, ureg_src(depth));
 960          ureg_DMUL(ureg, tmp_xy, ureg_src(tmp_xy), imm_f64);
 961          ureg_D2U(ureg, depth_x, ureg_src(tmp_xy));
 962
 963          if (z24_is_high)
 964             ureg_SHL(ureg, depth_x, ureg_src(depth), ureg_imm1u(ureg, 8));
 965          else
 966             ureg_AND(ureg, depth_x, ureg_src(depth), ureg_imm1u(ureg, 0xffffff));
 967       }
 968
 969       if (has_stencil) {
 970          /* Load stencil. */
 971          stencil_sampler = ureg_DECL_sampler(ureg, 1);
 972          ureg_DECL_sampler_view(ureg, 0, tex_target,
 973                                 TGSI_RETURN_TYPE_UINT,
 974                                 TGSI_RETURN_TYPE_UINT,
 975                                 TGSI_RETURN_TYPE_UINT,
 976                                 TGSI_RETURN_TYPE_UINT);
 977
 978          stencil = ureg_writemask(ureg_DECL_temporary(ureg), TGSI_WRITEMASK_X);
 979          ureg_load_tex(ureg, stencil, coord, stencil_sampler, tex_target,
 980                        true, true);
 981
 982          /* Pack stencil into depth. */
 983          if (is_z24) {
 984             if (!z24_is_high)
 985                ureg_SHL(ureg, stencil, ureg_src(stencil), ureg_imm1u(ureg, 24));
 986
 987             ureg_OR(ureg, depth_x, ureg_src(depth), ureg_src(stencil));
 988          }
 989       }
 990
 991       out = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
 992
 993       if (is_z24) {
 994          ureg_MOV(ureg, ureg_writemask(out, TGSI_WRITEMASK_X), ureg_src(depth));
 995       } else {
 996          /* Z32_S8X24 */
 997          ureg_MOV(ureg, ureg_writemask(depth, TGSI_WRITEMASK_Y),
 998                   ureg_scalar(ureg_src(stencil), TGSI_SWIZZLE_X));
 999          ureg_MOV(ureg, ureg_writemask(out, TGSI_WRITEMASK_XY), ureg_src(depth));
1000       }
1001    } else {
1002       color_sampler = ureg_DECL_sampler(ureg, 0);
1003       ureg_DECL_sampler_view(ureg, 0, tex_target,
1004                              TGSI_RETURN_TYPE_UINT,
1005                              TGSI_RETURN_TYPE_UINT,
1006                              TGSI_RETURN_TYPE_UINT,
1007                              TGSI_RETURN_TYPE_UINT);
1008
1009       color = ureg_DECL_temporary(ureg);
1010       ureg_load_tex(ureg, color, coord, color_sampler, tex_target, true, true);
1011
1012       depth = ureg_writemask(ureg_DECL_temporary(ureg), TGSI_WRITEMASK_X);
1013       stencil = ureg_writemask(ureg_DECL_temporary(ureg), TGSI_WRITEMASK_X);
1014
1015       if (is_z24) {
1016          double imm = 1.0 / 0xffffff;
1017          struct ureg_src imm_f64 = ureg_DECL_immediate_f64(ureg, &imm, 2);
1018          struct ureg_dst tmp_xy = ureg_writemask(ureg_DECL_temporary(ureg),
1019                                                  TGSI_WRITEMASK_XY);
1020
1021          ureg_UBFE(ureg, depth, ureg_src(color),
1022                    ureg_imm1u(ureg, z24_is_high ? 8 : 0),
1023                    ureg_imm1u(ureg, 24));
1024          ureg_U2D(ureg, tmp_xy, ureg_src(depth));
1025          ureg_DMUL(ureg, tmp_xy, ureg_src(tmp_xy), imm_f64);
1026          ureg_D2F(ureg, depth, ureg_src(tmp_xy));
1027       } else {
1028          /* depth = color.x; (Z32_S8X24) */
1029          ureg_MOV(ureg, depth, ureg_src(color));
1030       }
1031
1032       out_depth = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
1033       ureg_MOV(ureg, ureg_writemask(out_depth, TGSI_WRITEMASK_Z),
1034                ureg_scalar(ureg_src(depth), TGSI_SWIZZLE_X));
1035
1036       if (has_stencil) {
1037          if (is_z24) {
1038             ureg_UBFE(ureg, stencil, ureg_src(color),
1039                       ureg_imm1u(ureg, z24_is_high ? 0 : 24),
1040                       ureg_imm1u(ureg, 8));
1041          } else {
1042             /* stencil = color.y[0:7]; (Z32_S8X24) */
1043             ureg_UBFE(ureg, stencil,
1044                       ureg_scalar(ureg_src(color), TGSI_SWIZZLE_Y),
1045                       ureg_imm1u(ureg, 0),
1046                       ureg_imm1u(ureg, 8));
1047          }
1048
1049          out_stencil = ureg_DECL_output(ureg, TGSI_SEMANTIC_STENCIL, 0);
1050          ureg_MOV(ureg, ureg_writemask(out_stencil, TGSI_WRITEMASK_Y),
1051                   ureg_scalar(ureg_src(stencil), TGSI_SWIZZLE_X));
1052       }
1053    }
1054
1055    ureg_END(ureg);
1056
1057    return ureg_create_shader_and_destroy(ureg, pipe);
1058 }