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_private.h"
  35 #include "draw/draw_pt.h"
  36 #include "tgsi/tgsi_dump.h"
  37 #include "util/u_math.h"
  38 #include "util/u_prim.h"
  39
  40
  41 DEBUG_GET_ONCE_BOOL_OPTION(draw_fse, "DRAW_FSE", FALSE);
  42 DEBUG_GET_ONCE_BOOL_OPTION(draw_no_fse, "DRAW_NO_FSE", FALSE);
  43 #ifdef HAVE_LLVM
  44 DEBUG_GET_ONCE_BOOL_OPTION(draw_use_llvm, "DRAW_USE_LLVM", TRUE);
  45 #endif
  46
  47 static unsigned trim( unsigned count, unsigned first, unsigned incr )
  48 {
  49    if (count < first)
  50       return 0;
  51    return count - (count - first) % incr;
  52 }
  53
  54
  55
  56 /* Overall we split things into:
  57  *     - frontend -- prepare fetch_elts, draw_elts - eg vcache
  58  *     - middle   -- fetch, shade, cliptest, viewport
  59  *     - pipeline -- the prim pipeline: clipping, wide lines, etc
  60  *     - backend  -- the vbuf_render provided by the driver.
  61  */
  62 static boolean
  63 draw_pt_arrays(struct draw_context *draw,
  64                unsigned prim,
  65                unsigned start,
  66                unsigned count)
  67 {
  68    struct draw_pt_front_end *frontend = NULL;
  69    struct draw_pt_middle_end *middle = NULL;
  70    unsigned opt = 0;
  71
  72    /* Sanitize primitive length:
  73     */
  74    {
  75       unsigned first, incr;
  76       draw_pt_split_prim(prim, &first, &incr);
  77       count = trim(count, first, incr);
  78       if (count < first)
  79          return TRUE;
  80    }
  81
  82    if (!draw->force_passthrough) {
  83       if (!draw->render) {
  84          opt |= PT_PIPELINE;
  85       }
  86
  87       if (draw_need_pipeline(draw,
  88                              draw->rasterizer,
  89                              prim)) {
  90          opt |= PT_PIPELINE;
  91       }
  92
  93       if (!draw->bypass_clipping && !draw->pt.test_fse) {
  94          opt |= PT_CLIPTEST;
  95       }
  96
  97       opt |= PT_SHADE;
  98    }
  99
 100    if (opt == 0)
 101       middle = draw->pt.middle.fetch_emit;
 102    else if (opt == PT_SHADE && !draw->pt.no_fse)
 103       middle = draw->pt.middle.fetch_shade_emit;
 104    else
 105       middle = draw->pt.middle.general;
 106
 107
 108    /* Pick the right frontend
 109     */
 110    if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
 111       frontend = draw->pt.front.vcache;
 112    } else {
 113       frontend = draw->pt.front.varray;
 114    }
 115
 116    frontend->prepare( frontend, prim, middle, opt );
 117
 118    frontend->run(frontend,
 119                  draw_pt_elt_func(draw),
 120                  draw_pt_elt_ptr(draw, start),
 121                  draw->pt.user.eltBias,
 122                  count);
 123
 124    frontend->finish( frontend );
 125
 126    return TRUE;
 127 }
 128
 129
 130 boolean draw_pt_init( struct draw_context *draw )
 131 {
 132    draw->pt.test_fse = debug_get_option_draw_fse();
 133    draw->pt.no_fse = debug_get_option_draw_no_fse();
 134
 135    draw->pt.front.vcache = draw_pt_vcache( draw );
 136    if (!draw->pt.front.vcache)
 137       return FALSE;
 138
 139    draw->pt.front.varray = draw_pt_varray(draw);
 140    if (!draw->pt.front.varray)
 141       return FALSE;
 142
 143    draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
 144    if (!draw->pt.middle.fetch_emit)
 145       return FALSE;
 146
 147    draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
 148    if (!draw->pt.middle.fetch_shade_emit)
 149       return FALSE;
 150
 151 #if HAVE_LLVM
 152    draw->use_llvm = debug_get_option_draw_use_llvm();
 153    if (draw->use_llvm)
 154       draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit_llvm( draw );
 155 #else
 156    draw->pt.middle.general = NULL;
 157 #endif
 158
 159    if (!draw->pt.middle.general)
 160       draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
 161    if (!draw->pt.middle.general)
 162       return FALSE;
 163
 164    return TRUE;
 165 }
 166
 167
 168 void draw_pt_destroy( struct draw_context *draw )
 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.varray) {
 191       draw->pt.front.varray->destroy( draw->pt.front.varray );
 192       draw->pt.front.varray = 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          ptr += draw->pt.vertex_buffer[buf].stride * ii;
 251          ptr += draw->pt.vertex_element[j].src_offset;
 252
 253          debug_printf("  Attr %u: ", j);
 254          switch (draw->pt.vertex_element[j].src_format) {
 255          case PIPE_FORMAT_R32_FLOAT:
 256             {
 257                float *v = (float *) ptr;
 258                debug_printf("%f  @ %p\n", v[0], (void *) v);
 259             }
 260             break;
 261          case PIPE_FORMAT_R32G32_FLOAT:
 262             {
 263                float *v = (float *) ptr;
 264                debug_printf("%f %f  @ %p\n", v[0], v[1], (void *) v);
 265             }
 266             break;
 267          case PIPE_FORMAT_R32G32B32_FLOAT:
 268             {
 269                float *v = (float *) ptr;
 270                debug_printf("%f %f %f  @ %p\n", v[0], v[1], v[2], (void *) v);
 271             }
 272             break;
 273          case PIPE_FORMAT_R32G32B32A32_FLOAT:
 274             {
 275                float *v = (float *) ptr;
 276                debug_printf("%f %f %f %f  @ %p\n", v[0], v[1], v[2], v[3],
 277                             (void *) v);
 278             }
 279             break;
 280          default:
 281             debug_printf("other format (fix me)\n");
 282             ;
 283          }
 284       }
 285    }
 286 }
 287
 288
 289 /**
 290  * Draw vertex arrays
 291  * This is the main entrypoint into the drawing module.
 292  * \param prim  one of PIPE_PRIM_x
 293  * \param start  index of first vertex to draw
 294  * \param count  number of vertices to draw
 295  */
 296 void
 297 draw_arrays(struct draw_context *draw, unsigned prim,
 298             unsigned start, unsigned count)
 299 {
 300    draw_arrays_instanced(draw, prim, start, count, 0, 1);
 301 }
 302
 303 void
 304 draw_arrays_instanced(struct draw_context *draw,
 305                       unsigned mode,
 306                       unsigned start,
 307                       unsigned count,
 308                       unsigned startInstance,
 309                       unsigned instanceCount)
 310 {
 311    unsigned reduced_prim = u_reduced_prim(mode);
 312    unsigned instance;
 313
 314    if (reduced_prim != draw->reduced_prim) {
 315       draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 316       draw->reduced_prim = reduced_prim;
 317    }
 318
 319    if (0)
 320       draw_print_arrays(draw, mode, start, MIN2(count, 20));
 321
 322 #if 0
 323    {
 324       int i;
 325       debug_printf("draw_arrays(mode=%u start=%u count=%u):\n",
 326                    mode, start, count);
 327       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 328       debug_printf("Elements:\n");
 329       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 330          debug_printf("  format=%s\n",
 331                       util_format_name(draw->pt.vertex_element[i].src_format));
 332       }
 333       debug_printf("Buffers:\n");
 334       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 335          debug_printf("  stride=%u offset=%u ptr=%p\n",
 336                       draw->pt.vertex_buffer[i].stride,
 337                       draw->pt.vertex_buffer[i].buffer_offset,
 338                       draw->pt.user.vbuffer[i]);
 339       }
 340    }
 341 #endif
 342
 343    for (instance = 0; instance < instanceCount; instance++) {
 344       draw->instance_id = instance + startInstance;
 345       draw_pt_arrays(draw, mode, start, count);
 346    }
 347 }