src/gallium/auxiliary/draw/draw_pt.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  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33 #include "draw/draw_context.h"
  34 #include "draw/draw_gs.h"
  35 #include "draw/draw_private.h"
  36 #include "draw/draw_pt.h"
  37 #include "draw/draw_vs.h"
  38 #include "tgsi/tgsi_dump.h"
  39 #include "util/u_math.h"
  40 #include "util/u_prim.h"
  41 #include "util/u_format.h"
  42 #include "util/u_draw.h"
  43
  44
  45 DEBUG_GET_ONCE_BOOL_OPTION(draw_fse, "DRAW_FSE", FALSE)
  46 DEBUG_GET_ONCE_BOOL_OPTION(draw_no_fse, "DRAW_NO_FSE", FALSE)
  47
  48 /* Overall we split things into:
  49  *     - frontend -- prepare fetch_elts, draw_elts - eg vsplit
  50  *     - middle   -- fetch, shade, cliptest, viewport
  51  *     - pipeline -- the prim pipeline: clipping, wide lines, etc
  52  *     - backend  -- the vbuf_render provided by the driver.
  53  */
  54 static boolean
  55 draw_pt_arrays(struct draw_context *draw,
  56                unsigned prim,
  57                unsigned start,
  58                unsigned count)
  59 {
  60    struct draw_pt_front_end *frontend = NULL;
  61    struct draw_pt_middle_end *middle = NULL;
  62    unsigned opt = 0;
  63
  64    /* Sanitize primitive length:
  65     */
  66    {
  67       unsigned first, incr;
  68       draw_pt_split_prim(prim, &first, &incr);
  69       count = draw_pt_trim_count(count, first, incr);
  70       if (count < first)
  71          return TRUE;
  72    }
  73
  74    if (!draw->force_passthrough) {
  75       unsigned gs_out_prim = (draw->gs.geometry_shader ?
  76                               draw->gs.geometry_shader->output_primitive :
  77                               prim);
  78
  79       if (!draw->render) {
  80          opt |= PT_PIPELINE;
  81       }
  82
  83       if (draw_need_pipeline(draw,
  84                              draw->rasterizer,
  85                              gs_out_prim)) {
  86          opt |= PT_PIPELINE;
  87       }
  88
  89       if (!draw->bypass_clipping && !draw->pt.test_fse) {
  90          opt |= PT_CLIPTEST;
  91       }
  92
  93       opt |= PT_SHADE;
  94    }
  95
  96    if (draw->pt.middle.llvm) {
  97       middle = draw->pt.middle.llvm;
  98    } else {
  99       if (opt == 0)
 100          middle = draw->pt.middle.fetch_emit;
 101       else if (opt == PT_SHADE && !draw->pt.no_fse)
 102          middle = draw->pt.middle.fetch_shade_emit;
 103       else
 104          middle = draw->pt.middle.general;
 105    }
 106
 107    frontend = draw->pt.front.vsplit;
 108
 109    frontend->prepare( frontend, prim, middle, opt );
 110
 111    frontend->run(frontend, start, count);
 112
 113    frontend->finish( frontend );
 114
 115    return TRUE;
 116 }
 117
 118
 119 boolean draw_pt_init( struct draw_context *draw )
 120 {
 121    draw->pt.test_fse = debug_get_option_draw_fse();
 122    draw->pt.no_fse = debug_get_option_draw_no_fse();
 123
 124    draw->pt.front.vsplit = draw_pt_vsplit(draw);
 125    if (!draw->pt.front.vsplit)
 126       return FALSE;
 127
 128    draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
 129    if (!draw->pt.middle.fetch_emit)
 130       return FALSE;
 131
 132    draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
 133    if (!draw->pt.middle.fetch_shade_emit)
 134       return FALSE;
 135
 136    draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
 137    if (!draw->pt.middle.general)
 138       return FALSE;
 139
 140 #if HAVE_LLVM
 141    if (draw->llvm)
 142       draw->pt.middle.llvm = draw_pt_fetch_pipeline_or_emit_llvm( draw );
 143 #endif
 144
 145    return TRUE;
 146 }
 147
 148
 149 void draw_pt_destroy( struct draw_context *draw )
 150 {
 151    if (draw->pt.middle.llvm) {
 152       draw->pt.middle.llvm->destroy( draw->pt.middle.llvm );
 153       draw->pt.middle.llvm = NULL;
 154    }
 155
 156    if (draw->pt.middle.general) {
 157       draw->pt.middle.general->destroy( draw->pt.middle.general );
 158       draw->pt.middle.general = NULL;
 159    }
 160
 161    if (draw->pt.middle.fetch_emit) {
 162       draw->pt.middle.fetch_emit->destroy( draw->pt.middle.fetch_emit );
 163       draw->pt.middle.fetch_emit = NULL;
 164    }
 165
 166    if (draw->pt.middle.fetch_shade_emit) {
 167       draw->pt.middle.fetch_shade_emit->destroy( draw->pt.middle.fetch_shade_emit );
 168       draw->pt.middle.fetch_shade_emit = NULL;
 169    }
 170
 171    if (draw->pt.front.vsplit) {
 172       draw->pt.front.vsplit->destroy( draw->pt.front.vsplit );
 173       draw->pt.front.vsplit = NULL;
 174    }
 175 }
 176
 177
 178 /**
 179  * Debug- print the first 'count' vertices.
 180  */
 181 static void
 182 draw_print_arrays(struct draw_context *draw, uint prim, int start, uint count)
 183 {
 184    uint i;
 185
 186    debug_printf("Draw arrays(prim = %u, start = %u, count = %u)\n",
 187                 prim, start, count);
 188
 189    for (i = 0; i < count; i++) {
 190       uint ii = 0;
 191       uint j;
 192
 193       if (draw->pt.user.eltSize) {
 194          const char *elts;
 195
 196          /* indexed arrays */
 197          elts = (const char *) draw->pt.user.elts;
 198          elts += draw->pt.index_buffer.offset;
 199
 200          switch (draw->pt.user.eltSize) {
 201          case 1:
 202             {
 203                const ubyte *elem = (const ubyte *) elts;
 204                ii = elem[start + i];
 205             }
 206             break;
 207          case 2:
 208             {
 209                const ushort *elem = (const ushort *) elts;
 210                ii = elem[start + i];
 211             }
 212             break;
 213          case 4:
 214             {
 215                const uint *elem = (const uint *) elts;
 216                ii = elem[start + i];
 217             }
 218             break;
 219          default:
 220             assert(0);
 221             return;
 222          }
 223          ii += draw->pt.user.eltBias;
 224          debug_printf("Element[%u + %u] + %i -> Vertex %u:\n", start, i,
 225                       draw->pt.user.eltBias, ii);
 226       }
 227       else {
 228          /* non-indexed arrays */
 229          ii = start + i;
 230          debug_printf("Vertex %u:\n", ii);
 231       }
 232
 233       for (j = 0; j < draw->pt.nr_vertex_elements; j++) {
 234          uint buf = draw->pt.vertex_element[j].vertex_buffer_index;
 235          ubyte *ptr = (ubyte *) draw->pt.user.vbuffer[buf];
 236
 237          if (draw->pt.vertex_element[j].instance_divisor) {
 238             ii = draw->instance_id / draw->pt.vertex_element[j].instance_divisor;
 239          }
 240
 241          ptr += draw->pt.vertex_buffer[buf].buffer_offset;
 242          ptr += draw->pt.vertex_buffer[buf].stride * ii;
 243          ptr += draw->pt.vertex_element[j].src_offset;
 244
 245          debug_printf("  Attr %u: ", j);
 246          switch (draw->pt.vertex_element[j].src_format) {
 247          case PIPE_FORMAT_R32_FLOAT:
 248             {
 249                float *v = (float *) ptr;
 250                debug_printf("R %f  @ %p\n", v[0], (void *) v);
 251             }
 252             break;
 253          case PIPE_FORMAT_R32G32_FLOAT:
 254             {
 255                float *v = (float *) ptr;
 256                debug_printf("RG %f %f  @ %p\n", v[0], v[1], (void *) v);
 257             }
 258             break;
 259          case PIPE_FORMAT_R32G32B32_FLOAT:
 260             {
 261                float *v = (float *) ptr;
 262                debug_printf("RGB %f %f %f  @ %p\n", v[0], v[1], v[2], (void *) v);
 263             }
 264             break;
 265          case PIPE_FORMAT_R32G32B32A32_FLOAT:
 266             {
 267                float *v = (float *) ptr;
 268                debug_printf("RGBA %f %f %f %f  @ %p\n", v[0], v[1], v[2], v[3],
 269                             (void *) v);
 270             }
 271             break;
 272          case PIPE_FORMAT_B8G8R8A8_UNORM:
 273             {
 274                ubyte *u = (ubyte *) ptr;
 275                debug_printf("BGRA %d %d %d %d  @ %p\n", u[0], u[1], u[2], u[3],
 276                             (void *) u);
 277             }
 278             break;
 279          default:
 280             debug_printf("other format %s (fix me)\n",
 281                      util_format_name(draw->pt.vertex_element[j].src_format));
 282          }
 283       }
 284    }
 285 }
 286
 287
 288 /**
 289  * Non-instanced drawing.
 290  * \sa draw_arrays_instanced
 291  */
 292 void
 293 draw_arrays(struct draw_context *draw, unsigned prim,
 294             unsigned start, unsigned count)
 295 {
 296    draw_arrays_instanced(draw, prim, start, count, 0, 1);
 297 }
 298
 299
 300 /**
 301  * Instanced drawing.
 302  * draw_set_mapped_element_buffer must be called before calling this function.
 303  * \sa draw_vbo
 304  */
 305 void
 306 draw_arrays_instanced(struct draw_context *draw,
 307                       unsigned mode,
 308                       unsigned start,
 309                       unsigned count,
 310                       unsigned startInstance,
 311                       unsigned instanceCount)
 312 {
 313    struct pipe_draw_info info;
 314
 315    util_draw_init_info(&info);
 316
 317    info.mode = mode;
 318    info.start = start;
 319    info.count = count;
 320    info.start_instance = startInstance;
 321    info.instance_count = instanceCount;
 322
 323    info.indexed = (draw->pt.user.elts != NULL);
 324    info.index_bias = draw->pt.user.eltBias;
 325    info.min_index = draw->pt.user.min_index;
 326    info.max_index = draw->pt.user.max_index;
 327
 328    draw_vbo(draw, &info);
 329 }
 330
 331
 332 /**
 333  * Draw vertex arrays.
 334  * This is the main entrypoint into the drawing module.  If drawing an indexed
 335  * primitive, the draw_set_index_buffer() and draw_set_mapped_index_buffer()
 336  * functions should have already been called to specify the element/index
 337  * buffer information.
 338  */
 339 void
 340 draw_vbo(struct draw_context *draw,
 341          const struct pipe_draw_info *info)
 342 {
 343    unsigned reduced_prim = u_reduced_prim(info->mode);
 344    unsigned instance;
 345
 346    assert(info->instance_count > 0);
 347    if (info->indexed)
 348       assert(draw->pt.user.elts);
 349
 350    draw->pt.user.eltSize =
 351       (info->indexed) ? draw->pt.index_buffer.index_size : 0;
 352
 353    draw->pt.user.eltBias = info->index_bias;
 354    draw->pt.user.min_index = info->min_index;
 355    draw->pt.user.max_index = info->max_index;
 356
 357    if (reduced_prim != draw->reduced_prim) {
 358       draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 359       draw->reduced_prim = reduced_prim;
 360    }
 361
 362    if (0)
 363       debug_printf("draw_vbo(mode=%u start=%u count=%u):\n",
 364                    info->mode, info->start, info->count);
 365
 366    if (0)
 367       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 368
 369    if (0) {
 370       unsigned int i;
 371       debug_printf("Elements:\n");
 372       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 373          debug_printf("  %u: src_offset=%u  inst_div=%u   vbuf=%u  format=%s\n",
 374                       i,
 375                       draw->pt.vertex_element[i].src_offset,
 376                       draw->pt.vertex_element[i].instance_divisor,
 377                       draw->pt.vertex_element[i].vertex_buffer_index,
 378                       util_format_name(draw->pt.vertex_element[i].src_format));
 379       }
 380       debug_printf("Buffers:\n");
 381       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 382          debug_printf("  %u: stride=%u maxindex=%u offset=%u ptr=%p\n",
 383                       i,
 384                       draw->pt.vertex_buffer[i].stride,
 385                       draw->pt.vertex_buffer[i].max_index,
 386                       draw->pt.vertex_buffer[i].buffer_offset,
 387                       draw->pt.user.vbuffer[i]);
 388       }
 389    }
 390
 391    if (0)
 392       draw_print_arrays(draw, info->mode, info->start, MIN2(info->count, 20));
 393
 394    for (instance = 0; instance < info->instance_count; instance++) {
 395       draw->instance_id = instance + info->start_instance;
 396       draw_pt_arrays(draw, info->mode, info->start, info->count);
 397    }
 398 }