src/mesa/state_tracker/st_program.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   *   Brian Paul
  31   */
  32
  33
  34 #include "main/imports.h"
  35 #include "main/mtypes.h"
  36 #include "shader/prog_print.h"
  37 #include "shader/programopt.h"
  38
  39 #include "pipe/p_context.h"
  40 #include "pipe/p_defines.h"
  41 #include "pipe/p_shader_tokens.h"
  42 #include "draw/draw_context.h"
  43 #include "tgsi/tgsi_dump.h"
  44
  45 #include "st_debug.h"
  46 #include "st_context.h"
  47 #include "st_atom.h"
  48 #include "st_program.h"
  49 #include "st_mesa_to_tgsi.h"
  50 #include "cso_cache/cso_context.h"
  51
  52
  53
  54 /**
  55  * Clean out any old compilations:
  56  */
  57 void
  58 st_vp_release_varients( struct st_context *st,
  59                         struct st_vertex_program *stvp )
  60 {
  61    struct st_vp_varient *vpv;
  62
  63    for (vpv = stvp->varients; vpv; ) {
  64       struct st_vp_varient *next = vpv->next;
  65
  66       if (vpv->driver_shader)
  67          cso_delete_vertex_shader(st->cso_context, vpv->driver_shader);
  68
  69       if (vpv->draw_shader)
  70          draw_delete_vertex_shader( st->draw, vpv->draw_shader );
  71
  72       if (vpv->state.tokens)
  73          st_free_tokens(vpv->state.tokens);
  74
  75       FREE( vpv );
  76
  77       vpv = next;
  78    }
  79
  80    stvp->varients = NULL;
  81 }
  82
  83
  84
  85
  86 /**
  87  * Translate a Mesa vertex shader into a TGSI shader.
  88  * \param outputMapping  to map vertex program output registers (VERT_RESULT_x)
  89  *       to TGSI output slots
  90  * \param tokensOut  destination for TGSI tokens
  91  * \return  pointer to cached pipe_shader object.
  92  */
  93 void
  94 st_prepare_vertex_program(struct st_context *st,
  95                             struct st_vertex_program *stvp)
  96 {
  97    GLuint attr;
  98
  99    stvp->num_inputs = 0;
 100    stvp->num_outputs = 0;
 101
 102    if (stvp->Base.IsPositionInvariant)
 103       _mesa_insert_mvp_code(st->ctx, &stvp->Base);
 104
 105    /*
 106     * Determine number of inputs, the mappings between VERT_ATTRIB_x
 107     * and TGSI generic input indexes, plus input attrib semantic info.
 108     */
 109    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 110       if (stvp->Base.Base.InputsRead & (1 << attr)) {
 111          stvp->input_to_index[attr] = stvp->num_inputs;
 112          stvp->index_to_input[stvp->num_inputs] = attr;
 113          stvp->num_inputs++;
 114       }
 115    }
 116    /* bit of a hack, presetup potentially unused edgeflag input */
 117    stvp->input_to_index[VERT_ATTRIB_EDGEFLAG] = stvp->num_inputs;
 118    stvp->index_to_input[stvp->num_inputs] = VERT_ATTRIB_EDGEFLAG;
 119
 120    /* Compute mapping of vertex program outputs to slots.
 121     */
 122    for (attr = 0; attr < VERT_RESULT_MAX; attr++) {
 123       if ((stvp->Base.Base.OutputsWritten & (1 << attr)) == 0) {
 124          stvp->result_to_output[attr] = ~0;
 125       }
 126       else {
 127          unsigned slot = stvp->num_outputs++;
 128
 129          stvp->result_to_output[attr] = slot;
 130
 131          switch (attr) {
 132          case VERT_RESULT_HPOS:
 133             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 134             stvp->output_semantic_index[slot] = 0;
 135             break;
 136          case VERT_RESULT_COL0:
 137             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 138             stvp->output_semantic_index[slot] = 0;
 139             break;
 140          case VERT_RESULT_COL1:
 141             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 142             stvp->output_semantic_index[slot] = 1;
 143             break;
 144          case VERT_RESULT_BFC0:
 145             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 146             stvp->output_semantic_index[slot] = 0;
 147             break;
 148          case VERT_RESULT_BFC1:
 149             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 150             stvp->output_semantic_index[slot] = 1;
 151             break;
 152          case VERT_RESULT_FOGC:
 153             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 154             stvp->output_semantic_index[slot] = 0;
 155             break;
 156          case VERT_RESULT_PSIZ:
 157             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
 158             stvp->output_semantic_index[slot] = 0;
 159             break;
 160          case VERT_RESULT_EDGE:
 161             assert(0);
 162             break;
 163
 164          case VERT_RESULT_TEX0:
 165          case VERT_RESULT_TEX1:
 166          case VERT_RESULT_TEX2:
 167          case VERT_RESULT_TEX3:
 168          case VERT_RESULT_TEX4:
 169          case VERT_RESULT_TEX5:
 170          case VERT_RESULT_TEX6:
 171          case VERT_RESULT_TEX7:
 172             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 173             stvp->output_semantic_index[slot] = attr - VERT_RESULT_TEX0;
 174             break;
 175
 176          case VERT_RESULT_VAR0:
 177          default:
 178             assert(attr < VERT_RESULT_MAX);
 179             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 180             stvp->output_semantic_index[slot] = (FRAG_ATTRIB_VAR0 -
 181                                                 FRAG_ATTRIB_TEX0 +
 182                                                 attr -
 183                                                 VERT_RESULT_VAR0);
 184             break;
 185          }
 186       }
 187    }
 188    /* similar hack to above, presetup potentially unused edgeflag output */
 189    stvp->result_to_output[VERT_RESULT_EDGE] = stvp->num_outputs;
 190    stvp->output_semantic_name[stvp->num_outputs] = TGSI_SEMANTIC_EDGEFLAG;
 191    stvp->output_semantic_index[stvp->num_outputs] = 0;
 192 }
 193
 194
 195 struct st_vp_varient *
 196 st_translate_vertex_program(struct st_context *st,
 197                             struct st_vertex_program *stvp,
 198                             const struct st_vp_varient_key *key)
 199 {
 200    struct st_vp_varient *vpv = CALLOC_STRUCT(st_vp_varient);
 201    struct pipe_context *pipe = st->pipe;
 202    struct ureg_program *ureg;
 203    enum pipe_error error;
 204    unsigned num_outputs;
 205
 206    ureg = ureg_create( TGSI_PROCESSOR_VERTEX );
 207    if (ureg == NULL)
 208       return NULL;
 209
 210    vpv->num_inputs = stvp->num_inputs;
 211    num_outputs = stvp->num_outputs;
 212    if (key->passthrough_edgeflags) {
 213       vpv->num_inputs++;
 214       num_outputs++;
 215    }
 216
 217    error =
 218       st_translate_mesa_program(st->ctx,
 219                                 TGSI_PROCESSOR_VERTEX,
 220                                 ureg,
 221                                 &stvp->Base.Base,
 222                                 /* inputs */
 223                                 vpv->num_inputs,
 224                                 stvp->input_to_index,
 225                                 NULL, /* input semantic name */
 226                                 NULL, /* input semantic index */
 227                                 NULL,
 228                                 /* outputs */
 229                                 num_outputs,
 230                                 stvp->result_to_output,
 231                                 stvp->output_semantic_name,
 232                                 stvp->output_semantic_index,
 233                                 key->passthrough_edgeflags );
 234
 235    if (error)
 236       goto fail;
 237
 238    vpv->state.tokens = ureg_get_tokens( ureg, NULL );
 239    if (!vpv->state.tokens)
 240       goto fail;
 241
 242    ureg_destroy( ureg );
 243
 244    vpv->driver_shader = pipe->create_vs_state(pipe, &vpv->state);
 245
 246    if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
 247       _mesa_print_program(&stvp->Base.Base);
 248       debug_printf("\n");
 249    }
 250
 251    if (ST_DEBUG & DEBUG_TGSI) {
 252       tgsi_dump( vpv->state.tokens, 0 );
 253       debug_printf("\n");
 254    }
 255
 256    return vpv;
 257
 258 fail:
 259    debug_printf("%s: failed to translate Mesa program:\n", __FUNCTION__);
 260    _mesa_print_program(&stvp->Base.Base);
 261    debug_assert(0);
 262
 263    ureg_destroy( ureg );
 264    return NULL;
 265 }
 266
 267
 268
 269 /**
 270  * Translate a Mesa fragment shader into a TGSI shader.
 271  * \param inputMapping  to map fragment program input registers to TGSI
 272  *                      input slots
 273  * \return  pointer to cached pipe_shader object.
 274  */
 275 void
 276 st_translate_fragment_program(struct st_context *st,
 277                               struct st_fragment_program *stfp,
 278                               const GLuint inputMapping[])
 279 {
 280    struct pipe_context *pipe = st->pipe;
 281    GLuint outputMapping[FRAG_RESULT_MAX];
 282    GLuint defaultInputMapping[FRAG_ATTRIB_MAX];
 283    GLuint interpMode[16];  /* XXX size? */
 284    GLuint attr;
 285    enum pipe_error error;
 286    const GLbitfield inputsRead = stfp->Base.Base.InputsRead;
 287    struct ureg_program *ureg;
 288    GLuint vslot = 0;
 289
 290    uint fs_num_inputs = 0;
 291
 292    ubyte fs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
 293    ubyte fs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
 294    uint fs_num_outputs = 0;
 295
 296    /* which vertex output goes to the first fragment input: */
 297    if (inputsRead & FRAG_BIT_WPOS)
 298       vslot = 0;
 299    else
 300       vslot = 1;
 301
 302    /*
 303     * Convert Mesa program inputs to TGSI input register semantics.
 304     */
 305    for (attr = 0; attr < FRAG_ATTRIB_MAX; attr++) {
 306       if (inputsRead & (1 << attr)) {
 307          const GLuint slot = fs_num_inputs;
 308
 309          defaultInputMapping[attr] = slot;
 310
 311          stfp->input_map[slot] = vslot++;
 312
 313          fs_num_inputs++;
 314
 315          switch (attr) {
 316          case FRAG_ATTRIB_WPOS:
 317             stfp->input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 318             stfp->input_semantic_index[slot] = 0;
 319             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 320             break;
 321          case FRAG_ATTRIB_COL0:
 322             stfp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 323             stfp->input_semantic_index[slot] = 0;
 324             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 325             break;
 326          case FRAG_ATTRIB_COL1:
 327             stfp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 328             stfp->input_semantic_index[slot] = 1;
 329             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 330             break;
 331          case FRAG_ATTRIB_FOGC:
 332             stfp->input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 333             stfp->input_semantic_index[slot] = 0;
 334             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 335             break;
 336          case FRAG_ATTRIB_FACE:
 337             stfp->input_semantic_name[slot] = TGSI_SEMANTIC_FACE;
 338             stfp->input_semantic_index[slot] = 0;
 339             interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
 340             break;
 341
 342             /* In most cases, there is nothing special about these
 343              * inputs, so adopt a convention to use the generic
 344              * semantic name and the mesa FRAG_ATTRIB_ number as the
 345              * index.
 346              *
 347              * All that is required is that the vertex shader labels
 348              * its own outputs similarly, and that the vertex shader
 349              * generates at least every output required by the
 350              * fragment shader plus fixed-function hardware (such as
 351              * BFC).
 352              *
 353              * There is no requirement that semantic indexes start at
 354              * zero or be restricted to a particular range -- nobody
 355              * should be building tables based on semantic index.
 356              */
 357          case FRAG_ATTRIB_TEX0:
 358          case FRAG_ATTRIB_TEX1:
 359          case FRAG_ATTRIB_TEX2:
 360          case FRAG_ATTRIB_TEX3:
 361          case FRAG_ATTRIB_TEX4:
 362          case FRAG_ATTRIB_TEX5:
 363          case FRAG_ATTRIB_TEX6:
 364          case FRAG_ATTRIB_TEX7:
 365          case FRAG_ATTRIB_PNTC:
 366          case FRAG_ATTRIB_VAR0:
 367          default:
 368             /* Actually, let's try and zero-base this just for
 369              * readability of the generated TGSI.
 370              */
 371             assert(attr >= FRAG_ATTRIB_TEX0);
 372             stfp->input_semantic_index[slot] = (attr - FRAG_ATTRIB_TEX0);
 373             stfp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 374             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 375             break;
 376          }
 377       }
 378    }
 379
 380    /*
 381     * Semantics and mapping for outputs
 382     */
 383    {
 384       uint numColors = 0;
 385       GLbitfield64 outputsWritten = stfp->Base.Base.OutputsWritten;
 386
 387       /* if z is written, emit that first */
 388       if (outputsWritten & (1 << FRAG_RESULT_DEPTH)) {
 389          fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_POSITION;
 390          fs_output_semantic_index[fs_num_outputs] = 0;
 391          outputMapping[FRAG_RESULT_DEPTH] = fs_num_outputs;
 392          fs_num_outputs++;
 393          outputsWritten &= ~(1 << FRAG_RESULT_DEPTH);
 394       }
 395
 396       /* handle remaning outputs (color) */
 397       for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
 398          if (outputsWritten & (1 << attr)) {
 399             switch (attr) {
 400             case FRAG_RESULT_DEPTH:
 401                /* handled above */
 402                assert(0);
 403                break;
 404             default:
 405                assert(attr == FRAG_RESULT_COLOR ||
 406                       (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
 407                fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_COLOR;
 408                fs_output_semantic_index[fs_num_outputs] = numColors;
 409                outputMapping[attr] = fs_num_outputs;
 410                numColors++;
 411                break;
 412             }
 413
 414             fs_num_outputs++;
 415          }
 416       }
 417    }
 418
 419    if (!inputMapping)
 420       inputMapping = defaultInputMapping;
 421
 422    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 423    if (ureg == NULL)
 424       return;
 425
 426
 427    error =
 428       st_translate_mesa_program(st->ctx,
 429                                 TGSI_PROCESSOR_FRAGMENT,
 430                                 ureg,
 431                                 &stfp->Base.Base,
 432                                 /* inputs */
 433                                 fs_num_inputs,
 434                                 inputMapping,
 435                                 stfp->input_semantic_name,
 436                                 stfp->input_semantic_index,
 437                                 interpMode,
 438                                 /* outputs */
 439                                 fs_num_outputs,
 440                                 outputMapping,
 441                                 fs_output_semantic_name,
 442                                 fs_output_semantic_index, FALSE );
 443
 444    stfp->state.tokens = ureg_get_tokens( ureg, NULL );
 445    ureg_destroy( ureg );
 446    stfp->driver_shader = pipe->create_fs_state(pipe, &stfp->state);
 447
 448    if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
 449       _mesa_print_program(&stfp->Base.Base);
 450       debug_printf("\n");
 451    }
 452
 453    if (ST_DEBUG & DEBUG_TGSI) {
 454       tgsi_dump( stfp->state.tokens, 0/*TGSI_DUMP_VERBOSE*/ );
 455       debug_printf("\n");
 456    }
 457 }
 458
 459
 460 /**
 461  * Debug- print current shader text
 462  */
 463 void
 464 st_print_shaders(GLcontext *ctx)
 465 {
 466    struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
 467    if (shProg) {
 468       GLuint i;
 469       for (i = 0; i < shProg->NumShaders; i++) {
 470          printf("GLSL shader %u of %u:\n", i, shProg->NumShaders);
 471          printf("%s\n", shProg->Shaders[i]->Source);
 472       }
 473    }
 474 }