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