src/gallium/auxiliary/util/u_simple_shaders.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 "tgsi/tgsi_dump.h"
  45 #include "tgsi/tgsi_strings.h"
  46 #include "tgsi/tgsi_ureg.h"
  47 #include "tgsi/tgsi_text.h"
  48 #include <stdio.h> /* include last */
  49
  50
  51
  52 /**
  53  * Make simple vertex pass-through shader.
  54  * \param num_attribs  number of attributes to pass through
  55  * \param semantic_names  array of semantic names for each attribute
  56  * \param semantic_indexes  array of semantic indexes for each attribute
  57  */
  58 void *
  59 util_make_vertex_passthrough_shader(struct pipe_context *pipe,
  60                                     uint num_attribs,
  61                                     const uint *semantic_names,
  62                                     const uint *semantic_indexes)
  63 {
  64    return util_make_vertex_passthrough_shader_with_so(pipe, num_attribs,
  65                                                       semantic_names,
  66                                                       semantic_indexes, NULL);
  67 }
  68
  69 void *
  70 util_make_vertex_passthrough_shader_with_so(struct pipe_context *pipe,
  71                                     uint num_attribs,
  72                                     const uint *semantic_names,
  73                                     const uint *semantic_indexes,
  74                                     const struct pipe_stream_output_info *so)
  75 {
  76    struct ureg_program *ureg;
  77    uint i;
  78
  79    ureg = ureg_create( TGSI_PROCESSOR_VERTEX );
  80    if (ureg == NULL)
  81       return NULL;
  82
  83    for (i = 0; i < num_attribs; i++) {
  84       struct ureg_src src;
  85       struct ureg_dst dst;
  86
  87       src = ureg_DECL_vs_input( ureg, i );
  88
  89       dst = ureg_DECL_output( ureg,
  90                               semantic_names[i],
  91                               semantic_indexes[i]);
  92
  93       ureg_MOV( ureg, dst, src );
  94    }
  95
  96    ureg_END( ureg );
  97
  98    return ureg_create_shader_with_so_and_destroy( ureg, pipe, so );
  99 }
 100
 101
 102 /**
 103  * Make simple fragment texture shader:
 104  *  IMM {0,0,0,1}                         // (if writemask != 0xf)
 105  *  MOV OUT[0], IMM[0]                    // (if writemask != 0xf)
 106  *  TEX OUT[0].writemask, IN[0], SAMP[0], 2D;
 107  *  END;
 108  *
 109  * \param tex_target  one of PIPE_TEXTURE_x
 110  * \parma interp_mode  either TGSI_INTERPOLATE_LINEAR or PERSPECTIVE
 111  * \param writemask  mask of TGSI_WRITEMASK_x
 112  */
 113 void *
 114 util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
 115                                         unsigned tex_target,
 116                                         unsigned interp_mode,
 117                                         unsigned writemask )
 118 {
 119    struct ureg_program *ureg;
 120    struct ureg_src sampler;
 121    struct ureg_src tex;
 122    struct ureg_dst out;
 123
 124    assert(interp_mode == TGSI_INTERPOLATE_LINEAR ||
 125           interp_mode == TGSI_INTERPOLATE_PERSPECTIVE);
 126
 127    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 128    if (ureg == NULL)
 129       return NULL;
 130
 131    sampler = ureg_DECL_sampler( ureg, 0 );
 132
 133    tex = ureg_DECL_fs_input( ureg,
 134                              TGSI_SEMANTIC_GENERIC, 0,
 135                              interp_mode );
 136
 137    out = ureg_DECL_output( ureg,
 138                            TGSI_SEMANTIC_COLOR,
 139                            0 );
 140
 141    if (writemask != TGSI_WRITEMASK_XYZW) {
 142       struct ureg_src imm = ureg_imm4f( ureg, 0, 0, 0, 1 );
 143
 144       ureg_MOV( ureg, out, imm );
 145    }
 146
 147    ureg_TEX( ureg,
 148              ureg_writemask(out, writemask),
 149              tex_target, tex, sampler );
 150    ureg_END( ureg );
 151
 152    return ureg_create_shader_and_destroy( ureg, pipe );
 153 }
 154
 155
 156 /**
 157  * Make a simple fragment shader that sets the output color to a color
 158  * taken from a texture.
 159  * \param tex_target  one of PIPE_TEXTURE_x
 160  */
 161 void *
 162 util_make_fragment_tex_shader(struct pipe_context *pipe, unsigned tex_target,
 163                               unsigned interp_mode)
 164 {
 165    return util_make_fragment_tex_shader_writemask( pipe,
 166                                                    tex_target,
 167                                                    interp_mode,
 168                                                    TGSI_WRITEMASK_XYZW );
 169 }
 170
 171
 172 /**
 173  * Make a simple fragment texture shader which reads an X component from
 174  * a texture and writes it as depth.
 175  */
 176 void *
 177 util_make_fragment_tex_shader_writedepth(struct pipe_context *pipe,
 178                                          unsigned tex_target,
 179                                          unsigned interp_mode)
 180 {
 181    struct ureg_program *ureg;
 182    struct ureg_src sampler;
 183    struct ureg_src tex;
 184    struct ureg_dst out, depth;
 185    struct ureg_src imm;
 186
 187    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 188    if (ureg == NULL)
 189       return NULL;
 190
 191    sampler = ureg_DECL_sampler( ureg, 0 );
 192
 193    tex = ureg_DECL_fs_input( ureg,
 194                              TGSI_SEMANTIC_GENERIC, 0,
 195                              interp_mode );
 196
 197    out = ureg_DECL_output( ureg,
 198                            TGSI_SEMANTIC_COLOR,
 199                            0 );
 200
 201    depth = ureg_DECL_output( ureg,
 202                              TGSI_SEMANTIC_POSITION,
 203                              0 );
 204
 205    imm = ureg_imm4f( ureg, 0, 0, 0, 1 );
 206
 207    ureg_MOV( ureg, out, imm );
 208
 209    ureg_TEX( ureg,
 210              ureg_writemask(depth, TGSI_WRITEMASK_Z),
 211              tex_target, tex, sampler );
 212    ureg_END( ureg );
 213
 214    return ureg_create_shader_and_destroy( ureg, pipe );
 215 }
 216
 217
 218 /**
 219  * Make a simple fragment texture shader which reads the texture unit 0 and 1
 220  * and writes it as depth and stencil, respectively.
 221  */
 222 void *
 223 util_make_fragment_tex_shader_writedepthstencil(struct pipe_context *pipe,
 224                                                 unsigned tex_target,
 225                                                 unsigned interp_mode)
 226 {
 227    struct ureg_program *ureg;
 228    struct ureg_src depth_sampler, stencil_sampler;
 229    struct ureg_src tex;
 230    struct ureg_dst out, depth, stencil;
 231    struct ureg_src imm;
 232
 233    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 234    if (ureg == NULL)
 235       return NULL;
 236
 237    depth_sampler = ureg_DECL_sampler( ureg, 0 );
 238    stencil_sampler = ureg_DECL_sampler( ureg, 1 );
 239
 240    tex = ureg_DECL_fs_input( ureg,
 241                              TGSI_SEMANTIC_GENERIC, 0,
 242                              interp_mode );
 243
 244    out = ureg_DECL_output( ureg,
 245                            TGSI_SEMANTIC_COLOR,
 246                            0 );
 247
 248    depth = ureg_DECL_output( ureg,
 249                              TGSI_SEMANTIC_POSITION,
 250                              0 );
 251
 252    stencil = ureg_DECL_output( ureg,
 253                              TGSI_SEMANTIC_STENCIL,
 254                              0 );
 255
 256    imm = ureg_imm4f( ureg, 0, 0, 0, 1 );
 257
 258    ureg_MOV( ureg, out, imm );
 259
 260    ureg_TEX( ureg,
 261              ureg_writemask(depth, TGSI_WRITEMASK_Z),
 262              tex_target, tex, depth_sampler );
 263    ureg_TEX( ureg,
 264              ureg_writemask(stencil, TGSI_WRITEMASK_Y),
 265              tex_target, tex, stencil_sampler );
 266    ureg_END( ureg );
 267
 268    return ureg_create_shader_and_destroy( ureg, pipe );
 269 }
 270
 271
 272 /**
 273  * Make a simple fragment texture shader which reads a texture and writes it
 274  * as stencil.
 275  */
 276 void *
 277 util_make_fragment_tex_shader_writestencil(struct pipe_context *pipe,
 278                                            unsigned tex_target,
 279                                            unsigned interp_mode)
 280 {
 281    struct ureg_program *ureg;
 282    struct ureg_src stencil_sampler;
 283    struct ureg_src tex;
 284    struct ureg_dst out, stencil;
 285    struct ureg_src imm;
 286
 287    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 288    if (ureg == NULL)
 289       return NULL;
 290
 291    stencil_sampler = ureg_DECL_sampler( ureg, 0 );
 292
 293    tex = ureg_DECL_fs_input( ureg,
 294                              TGSI_SEMANTIC_GENERIC, 0,
 295                              interp_mode );
 296
 297    out = ureg_DECL_output( ureg,
 298                            TGSI_SEMANTIC_COLOR,
 299                            0 );
 300
 301    stencil = ureg_DECL_output( ureg,
 302                              TGSI_SEMANTIC_STENCIL,
 303                              0 );
 304
 305    imm = ureg_imm4f( ureg, 0, 0, 0, 1 );
 306
 307    ureg_MOV( ureg, out, imm );
 308
 309    ureg_TEX( ureg,
 310              ureg_writemask(stencil, TGSI_WRITEMASK_Y),
 311              tex_target, tex, stencil_sampler );
 312    ureg_END( ureg );
 313
 314    return ureg_create_shader_and_destroy( ureg, pipe );
 315 }
 316
 317
 318 /**
 319  * Make simple fragment color pass-through shader that replicates OUT[0]
 320  * to all bound colorbuffers.
 321  */
 322 void *
 323 util_make_fragment_passthrough_shader(struct pipe_context *pipe,
 324                                       int input_semantic,
 325                                       int input_interpolate,
 326                                       boolean write_all_cbufs)
 327 {
 328    static const char shader_templ[] =
 329          "FRAG\n"
 330          "%s"
 331          "DCL IN[0], %s[0], %s\n"
 332          "DCL OUT[0], COLOR[0]\n"
 333
 334          "MOV OUT[0], IN[0]\n"
 335          "END\n";
 336
 337    char text[sizeof(shader_templ)+100];
 338    struct tgsi_token tokens[1000];
 339    struct pipe_shader_state state = {tokens};
 340
 341    sprintf(text, shader_templ,
 342            write_all_cbufs ? "PROPERTY FS_COLOR0_WRITES_ALL_CBUFS 1\n" : "",
 343            tgsi_semantic_names[input_semantic],
 344            tgsi_interpolate_names[input_interpolate]);
 345
 346    if (!tgsi_text_translate(text, tokens, Elements(tokens))) {
 347       assert(0);
 348       return NULL;
 349    }
 350 #if 0
 351    tgsi_dump(state.tokens, 0);
 352 #endif
 353
 354    return pipe->create_fs_state(pipe, &state);
 355 }
 356
 357
 358 void *
 359 util_make_empty_fragment_shader(struct pipe_context *pipe)
 360 {
 361    struct ureg_program *ureg = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 362    if (ureg == NULL)
 363       return NULL;
 364
 365    ureg_END(ureg);
 366    return ureg_create_shader_and_destroy(ureg, pipe);
 367 }
 368
 369
 370 /**
 371  * Make a fragment shader that copies the input color to N output colors.
 372  */
 373 void *
 374 util_make_fragment_cloneinput_shader(struct pipe_context *pipe, int num_cbufs,
 375                                      int input_semantic,
 376                                      int input_interpolate)
 377 {
 378    struct ureg_program *ureg;
 379    struct ureg_src src;
 380    struct ureg_dst dst[PIPE_MAX_COLOR_BUFS];
 381    int i;
 382
 383    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 384
 385    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 386    if (ureg == NULL)
 387       return NULL;
 388
 389    src = ureg_DECL_fs_input( ureg, input_semantic, 0,
 390                              input_interpolate );
 391
 392    for (i = 0; i < num_cbufs; i++)
 393       dst[i] = ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, i );
 394
 395    for (i = 0; i < num_cbufs; i++)
 396       ureg_MOV( ureg, dst[i], src );
 397
 398    ureg_END( ureg );
 399
 400    return ureg_create_shader_and_destroy( ureg, pipe );
 401 }
 402
 403
 404 static void *
 405 util_make_fs_blit_msaa_gen(struct pipe_context *pipe,
 406                            unsigned tgsi_tex,
 407                            const char *output_semantic,
 408                            const char *output_mask)
 409 {
 410    static const char shader_templ[] =
 411          "FRAG\n"
 412          "DCL IN[0], GENERIC[0], LINEAR\n"
 413          "DCL SAMP[0]\n"
 414          "DCL OUT[0], %s\n"
 415          "DCL TEMP[0]\n"
 416
 417          "F2U TEMP[0], IN[0]\n"
 418          "TXF OUT[0]%s, TEMP[0], SAMP[0], %s\n"
 419          "END\n";
 420
 421    const char *type = tgsi_texture_names[tgsi_tex];
 422    char text[sizeof(shader_templ)+100];
 423    struct tgsi_token tokens[1000];
 424    struct pipe_shader_state state = {tokens};
 425
 426    assert(tgsi_tex == TGSI_TEXTURE_2D_MSAA ||
 427           tgsi_tex == TGSI_TEXTURE_2D_ARRAY_MSAA);
 428
 429    sprintf(text, shader_templ, output_semantic, output_mask, type);
 430
 431    if (!tgsi_text_translate(text, tokens, Elements(tokens))) {
 432       puts(text);
 433       assert(0);
 434       return NULL;
 435    }
 436 #if 0
 437    tgsi_dump(state.tokens, 0);
 438 #endif
 439
 440    return pipe->create_fs_state(pipe, &state);
 441 }
 442
 443
 444 /**
 445  * Make a fragment shader that sets the output color to a color
 446  * fetched from a multisample texture.
 447  * \param tex_target  one of PIPE_TEXTURE_x
 448  */
 449 void *
 450 util_make_fs_blit_msaa_color(struct pipe_context *pipe,
 451                              unsigned tgsi_tex)
 452 {
 453    return util_make_fs_blit_msaa_gen(pipe, tgsi_tex,
 454                                      "COLOR[0]", "");
 455 }
 456
 457
 458 /**
 459  * Make a fragment shader that sets the output depth to a depth value
 460  * fetched from a multisample texture.
 461  * \param tex_target  one of PIPE_TEXTURE_x
 462  */
 463 void *
 464 util_make_fs_blit_msaa_depth(struct pipe_context *pipe,
 465                              unsigned tgsi_tex)
 466 {
 467    return util_make_fs_blit_msaa_gen(pipe, tgsi_tex,
 468                                      "POSITION", ".z");
 469 }
 470
 471
 472 /**
 473  * Make a fragment shader that sets the output stencil to a stencil value
 474  * fetched from a multisample texture.
 475  * \param tex_target  one of PIPE_TEXTURE_x
 476  */
 477 void *
 478 util_make_fs_blit_msaa_stencil(struct pipe_context *pipe,
 479                                unsigned tgsi_tex)
 480 {
 481    return util_make_fs_blit_msaa_gen(pipe, tgsi_tex,
 482                                      "STENCIL", ".y");
 483 }
 484
 485
 486 /**
 487  * Make a fragment shader that sets the output depth and stencil to depth
 488  * and stencil values fetched from two multisample textures / samplers.
 489  * The sizes of both textures should match (it should be one depth-stencil
 490  * texture).
 491  * \param tex_target  one of PIPE_TEXTURE_x
 492  */
 493 void *
 494 util_make_fs_blit_msaa_depthstencil(struct pipe_context *pipe,
 495                                     unsigned tgsi_tex)
 496 {
 497    static const char shader_templ[] =
 498          "FRAG\n"
 499          "DCL IN[0], GENERIC[0], LINEAR\n"
 500          "DCL SAMP[0..1]\n"
 501          "DCL OUT[0], POSITION\n"
 502          "DCL OUT[1], STENCIL\n"
 503          "DCL TEMP[0]\n"
 504
 505          "F2U TEMP[0], IN[0]\n"
 506          "TXF OUT[0].z, TEMP[0], SAMP[0], %s\n"
 507          "TXF OUT[1].y, TEMP[0], SAMP[1], %s\n"
 508          "END\n";
 509
 510    const char *type = tgsi_texture_names[tgsi_tex];
 511    char text[sizeof(shader_templ)+100];
 512    struct tgsi_token tokens[1000];
 513    struct pipe_shader_state state = {tokens};
 514
 515    assert(tgsi_tex == TGSI_TEXTURE_2D_MSAA ||
 516           tgsi_tex == TGSI_TEXTURE_2D_ARRAY_MSAA);
 517
 518    sprintf(text, shader_templ, type, type);
 519
 520    if (!tgsi_text_translate(text, tokens, Elements(tokens))) {
 521       assert(0);
 522       return NULL;
 523    }
 524 #if 0
 525    tgsi_dump(state.tokens, 0);
 526 #endif
 527
 528    return pipe->create_fs_state(pipe, &state);
 529 }