src/gallium/auxiliary/draw/draw_gs.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   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 #include "draw_gs.h"
  29
  30 #include "draw_private.h"
  31 #include "draw_context.h"
  32
  33 #include "tgsi/tgsi_parse.h"
  34 #include "tgsi/tgsi_exec.h"
  35
  36 #include "pipe/p_shader_tokens.h"
  37
  38 #include "util/u_math.h"
  39 #include "util/u_memory.h"
  40 #include "util/u_prim.h"
  41
  42 /* fixme: move it from here */
  43 #define MAX_PRIMITIVES 64
  44
  45 boolean
  46 draw_gs_init( struct draw_context *draw )
  47 {
  48    draw->gs.machine = tgsi_exec_machine_create();
  49    if (!draw->gs.machine)
  50       return FALSE;
  51
  52    draw->gs.machine->Primitives = align_malloc(
  53       MAX_PRIMITIVES * sizeof(struct tgsi_exec_vector), 16);
  54    if (!draw->gs.machine->Primitives)
  55       return FALSE;
  56    memset(draw->gs.machine->Primitives, 0,
  57           MAX_PRIMITIVES * sizeof(struct tgsi_exec_vector));
  58
  59    return TRUE;
  60 }
  61
  62 void draw_gs_destroy( struct draw_context *draw )
  63 {
  64    if (!draw->gs.machine)
  65       return;
  66
  67    align_free(draw->gs.machine->Primitives);
  68
  69    tgsi_exec_machine_destroy(draw->gs.machine);
  70 }
  71
  72 void
  73 draw_gs_set_constants(struct draw_context *draw,
  74                       unsigned slot,
  75                       const void *constants,
  76                       unsigned size)
  77 {
  78    /* noop */
  79 }
  80
  81
  82 struct draw_geometry_shader *
  83 draw_create_geometry_shader(struct draw_context *draw,
  84                             const struct pipe_shader_state *state)
  85 {
  86    struct draw_geometry_shader *gs;
  87    int i;
  88
  89    gs = CALLOC_STRUCT(draw_geometry_shader);
  90
  91    if (!gs)
  92       return NULL;
  93
  94    gs->draw = draw;
  95    gs->state = *state;
  96    gs->state.tokens = tgsi_dup_tokens(state->tokens);
  97    if (!gs->state.tokens) {
  98       FREE(gs);
  99       return NULL;
 100    }
 101
 102    tgsi_scan_shader(state->tokens, &gs->info);
 103
 104    /* setup the defaults */
 105    gs->input_primitive = PIPE_PRIM_TRIANGLES;
 106    gs->output_primitive = PIPE_PRIM_TRIANGLE_STRIP;
 107    gs->max_output_vertices = 32;
 108
 109    for (i = 0; i < gs->info.num_properties; ++i) {
 110       if (gs->info.properties[i].name ==
 111           TGSI_PROPERTY_GS_INPUT_PRIM)
 112          gs->input_primitive = gs->info.properties[i].data[0];
 113       else if (gs->info.properties[i].name ==
 114                TGSI_PROPERTY_GS_OUTPUT_PRIM)
 115          gs->output_primitive = gs->info.properties[i].data[0];
 116       else if (gs->info.properties[i].name ==
 117                TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES)
 118          gs->max_output_vertices = gs->info.properties[i].data[0];
 119    }
 120
 121    gs->machine = draw->gs.machine;
 122
 123    if (gs)
 124    {
 125       uint i;
 126       for (i = 0; i < gs->info.num_outputs; i++) {
 127          if (gs->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
 128              gs->info.output_semantic_index[i] == 0)
 129             gs->position_output = i;
 130       }
 131    }
 132
 133    return gs;
 134 }
 135
 136 void draw_bind_geometry_shader(struct draw_context *draw,
 137                                struct draw_geometry_shader *dgs)
 138 {
 139    draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 140
 141    if (dgs) {
 142       draw->gs.geometry_shader = dgs;
 143       draw->gs.num_gs_outputs = dgs->info.num_outputs;
 144       draw->gs.position_output = dgs->position_output;
 145       draw_geometry_shader_prepare(dgs, draw);
 146    }
 147    else {
 148       draw->gs.geometry_shader = NULL;
 149       draw->gs.num_gs_outputs = 0;
 150    }
 151 }
 152
 153 void draw_delete_geometry_shader(struct draw_context *draw,
 154                                  struct draw_geometry_shader *dgs)
 155 {
 156    FREE(dgs);
 157 }
 158
 159 /*#define DEBUG_OUTPUTS 1*/
 160 static INLINE void
 161 draw_geometry_fetch_outputs(struct draw_geometry_shader *shader,
 162                             int num_primitives,
 163                             float (**p_output)[4])
 164 {
 165    struct tgsi_exec_machine *machine = shader->machine;
 166    unsigned prim_idx, j, slot;
 167    float (*output)[4];
 168
 169    output = *p_output;
 170
 171    /* Unswizzle all output results.
 172     */
 173
 174    for (prim_idx = 0; prim_idx < num_primitives; ++prim_idx) {
 175       unsigned num_verts_per_prim = machine->Primitives[prim_idx];
 176       shader->primitive_lengths[prim_idx +   shader->emitted_primitives] =
 177          machine->Primitives[prim_idx];
 178       shader->emitted_vertices += num_verts_per_prim;
 179       for (j = 0; j < num_verts_per_prim; j++) {
 180          int idx = (prim_idx * num_verts_per_prim + j) *
 181                    shader->info.num_outputs;
 182 #ifdef DEBUG_OUTPUTS
 183          debug_printf("%d) Output vert:\n", idx / shader->info.num_outputs);
 184 #endif
 185          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 186             output[slot][0] = machine->Outputs[idx + slot].xyzw[0].f[0];
 187             output[slot][1] = machine->Outputs[idx + slot].xyzw[1].f[0];
 188             output[slot][2] = machine->Outputs[idx + slot].xyzw[2].f[0];
 189             output[slot][3] = machine->Outputs[idx + slot].xyzw[3].f[0];
 190 #ifdef DEBUG_OUTPUTS
 191             debug_printf("\t%d: %f %f %f %f\n", slot,
 192                          output[slot][0],
 193                          output[slot][1],
 194                          output[slot][2],
 195                          output[slot][3]);
 196 #endif
 197             debug_assert(!util_is_inf_or_nan(output[slot][0]));
 198          }
 199          output = (float (*)[4])((char *)output + shader->vertex_size);
 200       }
 201    }
 202    *p_output = output;
 203          shader->emitted_primitives += num_primitives;
 204 }
 205
 206 /*#define DEBUG_INPUTS 1*/
 207 static void draw_fetch_gs_input(struct draw_geometry_shader *shader,
 208                                 unsigned *indices,
 209                                 unsigned num_vertices,
 210                                 unsigned prim_idx)
 211 {
 212    struct tgsi_exec_machine *machine = shader->machine;
 213    unsigned slot, vs_slot, i;
 214    unsigned input_vertex_stride = shader->input_vertex_stride;
 215    const float (*input_ptr)[4];
 216
 217    input_ptr = shader->input;
 218
 219    for (i = 0; i < num_vertices; ++i) {
 220       const float (*input)[4];
 221 #if DEBUG_INPUTS
 222       debug_printf("%d) vertex index = %d (prim idx = %d)\n",
 223                    i, indices[i], prim_idx);
 224 #endif
 225       input = (const float (*)[4])(
 226          (const char *)input_ptr + (indices[i] * input_vertex_stride));
 227       for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
 228          unsigned idx = i * TGSI_EXEC_MAX_INPUT_ATTRIBS + slot;
 229          if (shader->info.input_semantic_name[slot] == TGSI_SEMANTIC_PRIMID) {
 230             machine->Inputs[idx].xyzw[0].f[prim_idx] =
 231                (float)shader->in_prim_idx;
 232             machine->Inputs[idx].xyzw[1].f[prim_idx] =
 233                (float)shader->in_prim_idx;
 234             machine->Inputs[idx].xyzw[2].f[prim_idx] =
 235                (float)shader->in_prim_idx;
 236             machine->Inputs[idx].xyzw[3].f[prim_idx] =
 237                (float)shader->in_prim_idx;
 238          } else {
 239 #if DEBUG_INPUTS
 240             debug_printf("\tSlot = %d, vs_slot = %d, idx = %d:\n",
 241                          slot, vs_slot, idx);
 242 #endif
 243 #if 1
 244             assert(!util_is_inf_or_nan(input[vs_slot][0]));
 245             assert(!util_is_inf_or_nan(input[vs_slot][1]));
 246             assert(!util_is_inf_or_nan(input[vs_slot][2]));
 247             assert(!util_is_inf_or_nan(input[vs_slot][3]));
 248 #endif
 249             machine->Inputs[idx].xyzw[0].f[prim_idx] = input[vs_slot][0];
 250             machine->Inputs[idx].xyzw[1].f[prim_idx] = input[vs_slot][1];
 251             machine->Inputs[idx].xyzw[2].f[prim_idx] = input[vs_slot][2];
 252             machine->Inputs[idx].xyzw[3].f[prim_idx] = input[vs_slot][3];
 253 #if DEBUG_INPUTS
 254             debug_printf("\t\t%f %f %f %f\n",
 255                          machine->Inputs[idx].xyzw[0].f[prim_idx],
 256                          machine->Inputs[idx].xyzw[1].f[prim_idx],
 257                          machine->Inputs[idx].xyzw[2].f[prim_idx],
 258                          machine->Inputs[idx].xyzw[3].f[prim_idx]);
 259 #endif
 260             ++vs_slot;
 261          }
 262       }
 263    }
 264 }
 265
 266 static void gs_flush(struct draw_geometry_shader *shader,
 267                      unsigned input_primitives)
 268 {
 269    unsigned out_prim_count;
 270    struct tgsi_exec_machine *machine = shader->machine;
 271
 272    debug_assert(input_primitives > 0 &&
 273                 input_primitives < 4);
 274
 275    tgsi_set_exec_mask(machine,
 276                       1,
 277                       input_primitives > 1,
 278                       input_primitives > 2,
 279                       input_primitives > 3);
 280
 281    /* run interpreter */
 282    tgsi_exec_machine_run(machine);
 283
 284    out_prim_count =
 285       machine->Temps[TGSI_EXEC_TEMP_PRIMITIVE_I].xyzw[TGSI_EXEC_TEMP_PRIMITIVE_C].u[0];
 286
 287 #if 0
 288    debug_printf("PRIM emitted prims = %d (verts=%d), cur prim count = %d\n",
 289                 shader->emitted_primitives, shader->emitted_vertices,
 290                 out_prim_count);
 291 #endif
 292    draw_geometry_fetch_outputs(shader, out_prim_count,
 293                                &shader->tmp_output);
 294 }
 295
 296 static void gs_point(struct draw_geometry_shader *shader,
 297                      int idx)
 298 {
 299    unsigned indices[1];
 300
 301    indices[0] = idx;
 302
 303    draw_fetch_gs_input(shader, indices, 1, 0);
 304    ++shader->in_prim_idx;
 305
 306    gs_flush(shader, 1);
 307 }
 308
 309 static void gs_line(struct draw_geometry_shader *shader,
 310                     int i0, int i1)
 311 {
 312    unsigned indices[2];
 313
 314    indices[0] = i0;
 315    indices[1] = i1;
 316
 317    draw_fetch_gs_input(shader, indices, 2, 0);
 318    ++shader->in_prim_idx;
 319
 320    gs_flush(shader, 1);
 321 }
 322
 323 static void gs_line_adj(struct draw_geometry_shader *shader,
 324                         int i0, int i1, int i2, int i3)
 325 {
 326    unsigned indices[4];
 327
 328    indices[0] = i0;
 329    indices[1] = i1;
 330    indices[2] = i2;
 331    indices[3] = i3;
 332
 333    draw_fetch_gs_input(shader, indices, 4, 0);
 334    ++shader->in_prim_idx;
 335
 336    gs_flush(shader, 1);
 337 }
 338
 339 static void gs_tri(struct draw_geometry_shader *shader,
 340                    int i0, int i1, int i2)
 341 {
 342    unsigned indices[3];
 343
 344    indices[0] = i0;
 345    indices[1] = i1;
 346    indices[2] = i2;
 347
 348    draw_fetch_gs_input(shader, indices, 3, 0);
 349    ++shader->in_prim_idx;
 350
 351    gs_flush(shader, 1);
 352 }
 353
 354 static void gs_tri_adj(struct draw_geometry_shader *shader,
 355                        int i0, int i1, int i2,
 356                        int i3, int i4, int i5)
 357 {
 358    unsigned indices[6];
 359
 360    indices[0] = i0;
 361    indices[1] = i1;
 362    indices[2] = i2;
 363    indices[3] = i3;
 364    indices[4] = i4;
 365    indices[5] = i5;
 366
 367    draw_fetch_gs_input(shader, indices, 6, 0);
 368    ++shader->in_prim_idx;
 369
 370    gs_flush(shader, 1);
 371 }
 372
 373 #define TRIANGLE(gs,i0,i1,i2) gs_tri(gs,i0,i1,i2)
 374 #define TRI_ADJ(gs,i0,i1,i2,i3,i4,i5)  gs_tri_adj(gs,i0,i1,i2,i3,i4,i5)
 375 #define LINE(gs,i0,i1)        gs_line(gs,i0,i1)
 376 #define LINE_ADJ(gs,i0,i1,i2,i3)    gs_line_adj(gs,i0,i1,i2,i3)
 377 #define POINT(gs,i0)          gs_point(gs,i0)
 378 #define FUNC gs_run
 379 #define LOCAL_VARS
 380 #include "draw_gs_tmp.h"
 381
 382
 383 #define TRIANGLE(gs,i0,i1,i2) gs_tri(gs,elts[i0],elts[i1],elts[i2])
 384 #define TRI_ADJ(gs,i0,i1,i2,i3,i4,i5)           \
 385    gs_tri_adj(gs,elts[i0],elts[i1],elts[i2],elts[i3], \
 386               elts[i4],elts[i5])
 387 #define LINE(gs,i0,i1)        gs_line(gs,elts[i0],elts[i1])
 388 #define LINE_ADJ(gs,i0,i1,i2,i3)  gs_line_adj(gs,elts[i0],      \
 389                                               elts[i1],         \
 390                                               elts[i2],elts[i3])
 391 #define POINT(gs,i0)          gs_point(gs,elts[i0])
 392 #define FUNC gs_run_elts
 393 #define LOCAL_VARS                         \
 394    const ushort *elts = input_prims->elts;
 395 #include "draw_gs_tmp.h"
 396
 397 int draw_geometry_shader_run(struct draw_geometry_shader *shader,
 398                              const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
 399                              const struct draw_vertex_info *input_verts,
 400                              const struct draw_prim_info *input_prim,
 401                              struct draw_vertex_info *output_verts,
 402                              struct draw_prim_info *output_prims )
 403 {
 404    const float (*input)[4] = (const float (*)[4])input_verts->verts->data;
 405    unsigned input_stride = input_verts->vertex_size;
 406    unsigned vertex_size = input_verts->vertex_size;
 407    struct tgsi_exec_machine *machine = shader->machine;
 408    unsigned int i;
 409    unsigned num_input_verts = input_prim->linear ?
 410                               input_verts->count :
 411                               input_prim->count;
 412    unsigned num_in_primitives =
 413       MAX2(u_gs_prims_for_vertices(input_prim->prim, num_input_verts),
 414            u_gs_prims_for_vertices(shader->input_primitive, num_input_verts));
 415    unsigned max_out_prims = u_gs_prims_for_vertices(shader->output_primitive,
 416                                                     shader->max_output_vertices)
 417                             * num_in_primitives;
 418
 419    output_verts->vertex_size = input_verts->vertex_size;
 420    output_verts->stride = input_verts->vertex_size;
 421    output_verts->verts =
 422       (struct vertex_header *)MALLOC(input_verts->vertex_size *
 423                                      num_in_primitives *
 424                                      shader->max_output_vertices);
 425
 426
 427 #if 0
 428    debug_printf("%s count = %d (in prims # = %d)\n",
 429                 __FUNCTION__, num_input_verts, num_in_primitives);
 430    debug_printf("\tlinear = %d, prim_info->count = %d\n",
 431                 input_prim->linear, input_prim->count);
 432    debug_printf("\tprimt pipe = %d, shader in = %d, shader out = %d, max out = %d\n",
 433                 input_prim->prim, shader->input_primitive,
 434                 shader->output_primitive,
 435                 shader->max_output_vertices);
 436 #endif
 437
 438    shader->emitted_vertices = 0;
 439    shader->emitted_primitives = 0;
 440    shader->vertex_size = vertex_size;
 441    shader->tmp_output = (float (*)[4])output_verts->verts->data;
 442    shader->in_prim_idx = 0;
 443    shader->input_vertex_stride = input_stride;
 444    shader->input = input;
 445    if (shader->primitive_lengths) {
 446       FREE(shader->primitive_lengths);
 447    }
 448    shader->primitive_lengths = MALLOC(max_out_prims * sizeof(unsigned));
 449
 450    for (i = 0; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
 451       machine->Consts[i] = constants[i];
 452    }
 453
 454    if (input_prim->linear)
 455       gs_run(shader, input_prim, input_verts,
 456              output_prims, output_verts);
 457    else
 458       gs_run_elts(shader, input_prim, input_verts,
 459                   output_prims, output_verts);
 460
 461    /* Update prim_info:
 462     */
 463    output_prims->linear = TRUE;
 464    output_prims->elts = NULL;
 465    output_prims->start = 0;
 466    output_prims->count = shader->emitted_vertices;
 467    output_prims->prim = shader->output_primitive;
 468    output_prims->primitive_lengths = shader->primitive_lengths;
 469    output_prims->primitive_count = shader->emitted_primitives;
 470    output_verts->count = shader->emitted_vertices;
 471
 472 #if 0
 473    debug_printf("GS finished, prims = %d, verts = %d\n",
 474                 output_prims->primitive_count,
 475                 output_verts->count);
 476 #endif
 477
 478    return shader->emitted_vertices;
 479 }
 480
 481 void draw_geometry_shader_delete(struct draw_geometry_shader *shader)
 482 {
 483    FREE((void*) shader->state.tokens);
 484    FREE(shader);
 485 }
 486
 487 void draw_geometry_shader_prepare(struct draw_geometry_shader *shader,
 488                                   struct draw_context *draw)
 489 {
 490    if (shader && shader->machine->Tokens != shader->state.tokens) {
 491       tgsi_exec_machine_bind_shader(shader->machine,
 492                                     shader->state.tokens,
 493                                     draw->gs.num_samplers,
 494                                     draw->gs.samplers);
 495    }
 496 }