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 "tgsi/tgsi_dump.h"
  38 #include "util/u_math.h"
  39 #include "util/u_prim.h"
  40
  41
  42 DEBUG_GET_ONCE_BOOL_OPTION(draw_fse, "DRAW_FSE", FALSE)
  43 DEBUG_GET_ONCE_BOOL_OPTION(draw_no_fse, "DRAW_NO_FSE", FALSE)
  44 #ifdef HAVE_LLVM
  45 DEBUG_GET_ONCE_BOOL_OPTION(draw_use_llvm, "DRAW_USE_LLVM", TRUE)
  46 #endif
  47
  48 static unsigned trim( unsigned count, unsigned first, unsigned incr )
  49 {
  50    if (count < first)
  51       return 0;
  52    return count - (count - first) % incr;
  53 }
  54
  55
  56
  57 /* Overall we split things into:
  58  *     - frontend -- prepare fetch_elts, draw_elts - eg vcache
  59  *     - middle   -- fetch, shade, cliptest, viewport
  60  *     - pipeline -- the prim pipeline: clipping, wide lines, etc
  61  *     - backend  -- the vbuf_render provided by the driver.
  62  */
  63 static boolean
  64 draw_pt_arrays(struct draw_context *draw,
  65                unsigned prim,
  66                unsigned start,
  67                unsigned count)
  68 {
  69    struct draw_pt_front_end *frontend = NULL;
  70    struct draw_pt_middle_end *middle = NULL;
  71    unsigned opt = 0;
  72
  73    /* Sanitize primitive length:
  74     */
  75    {
  76       unsigned first, incr;
  77       draw_pt_split_prim(prim, &first, &incr);
  78       count = trim(count, first, incr);
  79       if (count < first)
  80          return TRUE;
  81    }
  82
  83    if (!draw->force_passthrough) {
  84       unsigned gs_out_prim = (draw->gs.geometry_shader ?
  85                               draw->gs.geometry_shader->output_primitive :
  86                               prim);
  87
  88       if (!draw->render) {
  89          opt |= PT_PIPELINE;
  90       }
  91
  92       if (draw_need_pipeline(draw,
  93                              draw->rasterizer,
  94                              gs_out_prim)) {
  95          opt |= PT_PIPELINE;
  96       }
  97
  98       if (!draw->bypass_clipping && !draw->pt.test_fse) {
  99          opt |= PT_CLIPTEST;
 100       }
 101
 102       opt |= PT_SHADE;
 103    }
 104
 105    if (draw->pt.middle.llvm && !draw->gs.geometry_shader) {
 106       middle = draw->pt.middle.llvm;
 107    } else {
 108       if (opt == 0)
 109          middle = draw->pt.middle.fetch_emit;
 110       else if (opt == PT_SHADE && !draw->pt.no_fse)
 111          middle = draw->pt.middle.fetch_shade_emit;
 112       else
 113          middle = draw->pt.middle.general;
 114    }
 115
 116
 117    /* Pick the right frontend
 118     */
 119    if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
 120       frontend = draw->pt.front.vcache;
 121    } else {
 122       frontend = draw->pt.front.varray;
 123    }
 124
 125    frontend->prepare( frontend, prim, middle, opt );
 126
 127    frontend->run(frontend,
 128                  draw_pt_elt_func(draw),
 129                  draw_pt_elt_ptr(draw, start),
 130                  draw->pt.user.eltBias,
 131                  count);
 132
 133    frontend->finish( frontend );
 134
 135    return TRUE;
 136 }
 137
 138
 139 boolean draw_pt_init( struct draw_context *draw )
 140 {
 141    draw->pt.test_fse = debug_get_option_draw_fse();
 142    draw->pt.no_fse = debug_get_option_draw_no_fse();
 143
 144    draw->pt.front.vcache = draw_pt_vcache( draw );
 145    if (!draw->pt.front.vcache)
 146       return FALSE;
 147
 148    draw->pt.front.varray = draw_pt_varray(draw);
 149    if (!draw->pt.front.varray)
 150       return FALSE;
 151
 152    draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
 153    if (!draw->pt.middle.fetch_emit)
 154       return FALSE;
 155
 156    draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
 157    if (!draw->pt.middle.fetch_shade_emit)
 158       return FALSE;
 159
 160    draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
 161    if (!draw->pt.middle.general)
 162       return FALSE;
 163
 164 #if HAVE_LLVM
 165    if (debug_get_option_draw_use_llvm())
 166       draw->pt.middle.llvm = draw_pt_fetch_pipeline_or_emit_llvm( draw );
 167 #endif
 168
 169    return TRUE;
 170 }
 171
 172
 173 void draw_pt_destroy( struct draw_context *draw )
 174 {
 175    if (draw->pt.middle.llvm) {
 176       draw->pt.middle.llvm->destroy( draw->pt.middle.llvm );
 177       draw->pt.middle.llvm = NULL;
 178    }
 179
 180    if (draw->pt.middle.general) {
 181       draw->pt.middle.general->destroy( draw->pt.middle.general );
 182       draw->pt.middle.general = NULL;
 183    }
 184
 185    if (draw->pt.middle.fetch_emit) {
 186       draw->pt.middle.fetch_emit->destroy( draw->pt.middle.fetch_emit );
 187       draw->pt.middle.fetch_emit = NULL;
 188    }
 189
 190    if (draw->pt.middle.fetch_shade_emit) {
 191       draw->pt.middle.fetch_shade_emit->destroy( draw->pt.middle.fetch_shade_emit );
 192       draw->pt.middle.fetch_shade_emit = NULL;
 193    }
 194
 195    if (draw->pt.front.vcache) {
 196       draw->pt.front.vcache->destroy( draw->pt.front.vcache );
 197       draw->pt.front.vcache = NULL;
 198    }
 199
 200    if (draw->pt.front.varray) {
 201       draw->pt.front.varray->destroy( draw->pt.front.varray );
 202       draw->pt.front.varray = NULL;
 203    }
 204 }
 205
 206
 207 /**
 208  * Debug- print the first 'count' vertices.
 209  */
 210 static void
 211 draw_print_arrays(struct draw_context *draw, uint prim, int start, uint count)
 212 {
 213    uint i;
 214
 215    debug_printf("Draw arrays(prim = %u, start = %u, count = %u)\n",
 216                 prim, start, count);
 217
 218    for (i = 0; i < count; i++) {
 219       uint ii = 0;
 220       uint j;
 221
 222       if (draw->pt.user.elts) {
 223          /* indexed arrays */
 224          switch (draw->pt.user.eltSize) {
 225          case 1:
 226             {
 227                const ubyte *elem = (const ubyte *) draw->pt.user.elts;
 228                ii = elem[start + i];
 229             }
 230             break;
 231          case 2:
 232             {
 233                const ushort *elem = (const ushort *) draw->pt.user.elts;
 234                ii = elem[start + i];
 235             }
 236             break;
 237          case 4:
 238             {
 239                const uint *elem = (const uint *) draw->pt.user.elts;
 240                ii = elem[start + i];
 241             }
 242             break;
 243          default:
 244             assert(0);
 245             return;
 246          }
 247          ii += draw->pt.user.eltBias;
 248          debug_printf("Element[%u + %u] + %i -> Vertex %u:\n", start, i,
 249                       draw->pt.user.eltBias, ii);
 250       }
 251       else {
 252          /* non-indexed arrays */
 253          ii = start + i;
 254          debug_printf("Vertex %u:\n", ii);
 255       }
 256
 257       for (j = 0; j < draw->pt.nr_vertex_elements; j++) {
 258          uint buf = draw->pt.vertex_element[j].vertex_buffer_index;
 259          ubyte *ptr = (ubyte *) draw->pt.user.vbuffer[buf];
 260          ptr += draw->pt.vertex_buffer[buf].stride * ii;
 261          ptr += draw->pt.vertex_element[j].src_offset;
 262
 263          debug_printf("  Attr %u: ", j);
 264          switch (draw->pt.vertex_element[j].src_format) {
 265          case PIPE_FORMAT_R32_FLOAT:
 266             {
 267                float *v = (float *) ptr;
 268                debug_printf("%f  @ %p\n", v[0], (void *) v);
 269             }
 270             break;
 271          case PIPE_FORMAT_R32G32_FLOAT:
 272             {
 273                float *v = (float *) ptr;
 274                debug_printf("%f %f  @ %p\n", v[0], v[1], (void *) v);
 275             }
 276             break;
 277          case PIPE_FORMAT_R32G32B32_FLOAT:
 278             {
 279                float *v = (float *) ptr;
 280                debug_printf("%f %f %f  @ %p\n", v[0], v[1], v[2], (void *) v);
 281             }
 282             break;
 283          case PIPE_FORMAT_R32G32B32A32_FLOAT:
 284             {
 285                float *v = (float *) ptr;
 286                debug_printf("%f %f %f %f  @ %p\n", v[0], v[1], v[2], v[3],
 287                             (void *) v);
 288             }
 289             break;
 290          default:
 291             debug_printf("other format (fix me)\n");
 292             ;
 293          }
 294       }
 295    }
 296 }
 297
 298
 299 /**
 300  * Draw vertex arrays
 301  * This is the main entrypoint into the drawing module.
 302  * \param prim  one of PIPE_PRIM_x
 303  * \param start  index of first vertex to draw
 304  * \param count  number of vertices to draw
 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 void
 314 draw_arrays_instanced(struct draw_context *draw,
 315                       unsigned mode,
 316                       unsigned start,
 317                       unsigned count,
 318                       unsigned startInstance,
 319                       unsigned instanceCount)
 320 {
 321    unsigned reduced_prim = u_reduced_prim(mode);
 322    unsigned instance;
 323
 324    if (reduced_prim != draw->reduced_prim) {
 325       draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 326       draw->reduced_prim = reduced_prim;
 327    }
 328
 329    if (0)
 330       draw_print_arrays(draw, mode, start, MIN2(count, 20));
 331
 332 #if 0
 333    {
 334       int i;
 335       debug_printf("draw_arrays(mode=%u start=%u count=%u):\n",
 336                    mode, start, count);
 337       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 338       debug_printf("Elements:\n");
 339       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 340          debug_printf("  format=%s\n",
 341                       util_format_name(draw->pt.vertex_element[i].src_format));
 342       }
 343       debug_printf("Buffers:\n");
 344       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 345          debug_printf("  stride=%u offset=%u ptr=%p\n",
 346                       draw->pt.vertex_buffer[i].stride,
 347                       draw->pt.vertex_buffer[i].buffer_offset,
 348                       draw->pt.user.vbuffer[i]);
 349       }
 350    }
 351 #endif
 352
 353    for (instance = 0; instance < instanceCount; instance++) {
 354       draw->instance_id = instance + startInstance;
 355       draw_pt_arrays(draw, mode, start, count);
 356    }
 357 }