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