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 #define MAX_PRIM_VERTICES 6
  43 /* fixme: move it from here */
  44 #define MAX_PRIMITIVES 64
  45
  46 boolean
  47 draw_gs_init( struct draw_context *draw )
  48 {
  49    draw->gs.machine = tgsi_exec_machine_create();
  50    if (!draw->gs.machine)
  51       return FALSE;
  52
  53    draw->gs.machine->Primitives = align_malloc(
  54       MAX_PRIMITIVES * sizeof(struct tgsi_exec_vector), 16);
  55    if (!draw->gs.machine->Primitives)
  56       return FALSE;
  57    memset(draw->gs.machine->Primitives, 0,
  58           MAX_PRIMITIVES * sizeof(struct tgsi_exec_vector));
  59
  60    return TRUE;
  61 }
  62
  63 void draw_gs_destroy( struct draw_context *draw )
  64 {
  65    if (!draw->gs.machine)
  66       return;
  67
  68    align_free(draw->gs.machine->Primitives);
  69
  70    tgsi_exec_machine_destroy(draw->gs.machine);
  71 }
  72
  73 void
  74 draw_gs_set_constants(struct draw_context *draw,
  75                       unsigned slot,
  76                       const void *constants,
  77                       unsigned size)
  78 {
  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
 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       /*debug_printf("%d) vertex index = %d (prim idx = %d)\n", i, indices[i], prim_idx);*/
 222       input = (const float (*)[4])(
 223          (const char *)input_ptr + (indices[i] * input_vertex_stride));
 224       for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
 225          unsigned idx = i * TGSI_EXEC_MAX_INPUT_ATTRIBS + slot;
 226          if (shader->info.input_semantic_name[slot] == TGSI_SEMANTIC_PRIMID) {
 227             machine->Inputs[idx].xyzw[0].f[prim_idx] = (float)shader->in_prim_idx;
 228             machine->Inputs[idx].xyzw[1].f[prim_idx] = (float)shader->in_prim_idx;
 229             machine->Inputs[idx].xyzw[2].f[prim_idx] = (float)shader->in_prim_idx;
 230             machine->Inputs[idx].xyzw[3].f[prim_idx] = (float)shader->in_prim_idx;
 231          } else {
 232             /*debug_printf("\tSlot = %d, vs_slot = %d, idx = %d:\n",
 233               slot, vs_slot, idx);*/
 234 #if 1
 235             assert(!util_is_inf_or_nan(input[vs_slot][0]));
 236             assert(!util_is_inf_or_nan(input[vs_slot][1]));
 237             assert(!util_is_inf_or_nan(input[vs_slot][2]));
 238             assert(!util_is_inf_or_nan(input[vs_slot][3]));
 239 #endif
 240             machine->Inputs[idx].xyzw[0].f[prim_idx] = input[vs_slot][0];
 241             machine->Inputs[idx].xyzw[1].f[prim_idx] = input[vs_slot][1];
 242             machine->Inputs[idx].xyzw[2].f[prim_idx] = input[vs_slot][2];
 243             machine->Inputs[idx].xyzw[3].f[prim_idx] = input[vs_slot][3];
 244 #if 0
 245             debug_printf("\t\t%f %f %f %f\n",
 246                          machine->Inputs[idx].xyzw[0].f[prim_idx],
 247                          machine->Inputs[idx].xyzw[1].f[prim_idx],
 248                          machine->Inputs[idx].xyzw[2].f[prim_idx],
 249                          machine->Inputs[idx].xyzw[3].f[prim_idx]);
 250 #endif
 251             ++vs_slot;
 252          }
 253       }
 254    }
 255 }
 256
 257 static void gs_flush(struct draw_geometry_shader *shader,
 258                      unsigned input_primitives)
 259 {
 260    unsigned out_prim_count;
 261    struct tgsi_exec_machine *machine = shader->machine;
 262
 263    debug_assert(input_primitives > 0 &&
 264                 input_primitives < 4);
 265
 266    tgsi_set_exec_mask(machine,
 267                       1,
 268                       input_primitives > 1,
 269                       input_primitives > 2,
 270                       input_primitives > 3);
 271
 272    /* run interpreter */
 273    tgsi_exec_machine_run(machine);
 274
 275    out_prim_count =
 276       machine->Temps[TGSI_EXEC_TEMP_PRIMITIVE_I].xyzw[TGSI_EXEC_TEMP_PRIMITIVE_C].u[0];
 277
 278 #if 0
 279    debug_printf("PRIM emitted prims = %d (verts=%d), cur prim count = %d\n",
 280                 shader->emitted_primitives, shader->emitted_vertices,
 281                 out_prim_count);
 282 #endif
 283    draw_geometry_fetch_outputs(shader, out_prim_count,
 284                                &shader->tmp_output);
 285 }
 286
 287 static void gs_point(struct draw_geometry_shader *shader,
 288                      int idx)
 289 {
 290    unsigned indices[1];
 291
 292    indices[0] = idx;
 293
 294    draw_fetch_gs_input(shader, indices, 1, 0);
 295    ++shader->in_prim_idx;
 296
 297    gs_flush(shader, 1);
 298 }
 299
 300 static void gs_line(struct draw_geometry_shader *shader,
 301                     int i0, int i1)
 302 {
 303    unsigned indices[2];
 304
 305    indices[0] = i0;
 306    indices[1] = i1;
 307
 308    draw_fetch_gs_input(shader, indices, 2, 0);
 309    ++shader->in_prim_idx;
 310
 311    gs_flush(shader, 1);
 312 }
 313
 314 static void gs_tri(struct draw_geometry_shader *shader,
 315                    int i0, int i1, int i2)
 316 {
 317    unsigned indices[3];
 318
 319    indices[0] = i0;
 320    indices[1] = i1;
 321    indices[2] = i2;
 322
 323    draw_fetch_gs_input(shader, indices, 3, 0);
 324    ++shader->in_prim_idx;
 325
 326    gs_flush(shader, 1);
 327 }
 328
 329 #define TRIANGLE(gs,i0,i1,i2) gs_tri(gs,i0,i1,i2)
 330 #define LINE(gs,i0,i1)  gs_line(gs,i0,i1)
 331 #define POINT(gs,i0)          gs_point(gs,i0)
 332 #define FUNC gs_run
 333 #define LOCAL_VARS
 334 #include "draw_gs_tmp.h"
 335 #undef LOCAL_VARS
 336 #undef FUNC
 337
 338
 339 #define TRIANGLE(gs,i0,i1,i2) gs_tri(gs,elts[i0],elts[i1],elts[i2])
 340 #define LINE(gs,i0,i1)        gs_line(gs,elts[i0],elts[i1])
 341 #define POINT(gs,i0)          gs_point(gs,elts[i0])
 342 #define FUNC gs_run_elts
 343 #define LOCAL_VARS                         \
 344    const ushort *elts = input_prims->elts;
 345 #include "draw_gs_tmp.h"
 346 #undef LOCAL_VARS
 347 #undef FUNC
 348
 349 int draw_geometry_shader_run(struct draw_geometry_shader *shader,
 350                              const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
 351                              const struct draw_vertex_info *input_verts,
 352                              const struct draw_prim_info *input_prim,
 353                              struct draw_vertex_info *output_verts,
 354                              struct draw_prim_info *output_prims )
 355 {
 356    const float (*input)[4] = (const float (*)[4])input_verts->verts->data;
 357    unsigned input_stride = input_verts->vertex_size;
 358    unsigned vertex_size = input_verts->vertex_size;
 359    struct tgsi_exec_machine *machine = shader->machine;
 360    unsigned int i;
 361    unsigned num_input_verts = input_prim->linear ?
 362                               input_verts->count :
 363                               input_prim->count;
 364    unsigned num_in_primitives =
 365       MAX2(u_gs_prims_for_vertices(input_prim->prim, num_input_verts),
 366            u_gs_prims_for_vertices(shader->input_primitive, num_input_verts));
 367    unsigned max_out_prims = u_gs_prims_for_vertices(shader->output_primitive,
 368                                                     shader->max_output_vertices)
 369                             * num_in_primitives;
 370
 371    output_verts->vertex_size = input_verts->vertex_size;
 372    output_verts->stride = input_verts->vertex_size;
 373    output_verts->verts =
 374       (struct vertex_header *)MALLOC(input_verts->vertex_size *
 375                                      num_in_primitives *
 376                                      shader->max_output_vertices);
 377
 378
 379 #if 0
 380    debug_printf("%s count = %d (in prims # = %d)\n",
 381                 __FUNCTION__, num_input_verts, num_in_primitives);
 382    debug_printf("\tlinear = %d, prim_info->count = %d\n",
 383                 input_prim->linear, input_prim->count);
 384    debug_printf("\tprimt pipe = %d, shader in = %d, shader out = %d, max out = %d\n",
 385                 input_prim->prim, shader->input_primitive,
 386                 shader->output_primitive,
 387                 shader->max_output_vertices);
 388 #endif
 389
 390    shader->emitted_vertices = 0;
 391    shader->emitted_primitives = 0;
 392    shader->vertex_size = vertex_size;
 393    shader->tmp_output = (float (*)[4])output_verts->verts->data;
 394    shader->in_prim_idx = 0;
 395    shader->input_vertex_stride = input_stride;
 396    shader->input = input;
 397    if (shader->primitive_lengths) {
 398       FREE(shader->primitive_lengths);
 399    }
 400    shader->primitive_lengths = MALLOC(max_out_prims * sizeof(unsigned));
 401
 402    for (i = 0; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
 403       machine->Consts[i] = constants[i];
 404    }
 405
 406    if (input_prim->linear)
 407       gs_run(shader, input_prim, input_verts,
 408              output_prims, output_verts);
 409    else
 410       gs_run_elts(shader, input_prim, input_verts,
 411                   output_prims, output_verts);
 412
 413    /* Update prim_info:
 414     */
 415    output_prims->linear = TRUE;
 416    output_prims->elts = NULL;
 417    output_prims->start = 0;
 418    output_prims->count = shader->emitted_vertices;
 419    output_prims->prim = shader->output_primitive;
 420    output_prims->primitive_lengths = shader->primitive_lengths;
 421    output_prims->primitive_count = shader->emitted_primitives;
 422    output_verts->count = shader->emitted_vertices;
 423
 424 #if 0
 425    debug_printf("GS finished, prims = %d, verts = %d\n",
 426                 output_prims->primitive_count,
 427                 output_verts->count);
 428 #endif
 429
 430    return shader->emitted_vertices;
 431 }
 432
 433 void draw_geometry_shader_delete(struct draw_geometry_shader *shader)
 434 {
 435    FREE((void*) shader->state.tokens);
 436    FREE(shader);
 437 }
 438
 439 void draw_geometry_shader_prepare(struct draw_geometry_shader *shader,
 440                                   struct draw_context *draw)
 441 {
 442    if (shader && shader->machine->Tokens != shader->state.tokens) {
 443       tgsi_exec_machine_bind_shader(shader->machine,
 444                                     shader->state.tokens,
 445                                     draw->gs.num_samplers,
 446                                     draw->gs.samplers);
 447    }
 448 }