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 "draw/draw_vs.h"
  37 #include "tgsi/tgsi_dump.h"
  38 #include "util/u_math.h"
  39 #include "util/u_prim.h"
  40
  41 static unsigned trim( unsigned count, unsigned first, unsigned incr )
  42 {
  43    if (count < first)
  44       return 0;
  45    return count - (count - first) % incr;
  46 }
  47
  48
  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 = trim(count, first, incr);
  72       if (count < first)
  73          return TRUE;
  74    }
  75
  76    if (!draw->force_passthrough) {
  77       if (!draw->render) {
  78          opt |= PT_PIPELINE;
  79       }
  80
  81       if (draw_need_pipeline(draw,
  82                              draw->rasterizer,
  83                              prim)) {
  84          opt |= PT_PIPELINE;
  85       }
  86
  87       if (!draw->bypass_clipping && !draw->pt.test_fse) {
  88          opt |= PT_CLIPTEST;
  89       }
  90
  91       if (!draw->rasterizer->bypass_vs_clip_and_viewport) {
  92          opt |= PT_SHADE;
  93       }
  94    }
  95
  96    if (opt == 0)
  97       middle = draw->pt.middle.fetch_emit;
  98    else if (opt == PT_SHADE && !draw->pt.no_fse)
  99       middle = draw->pt.middle.fetch_shade_emit;
 100    else
 101       middle = draw->pt.middle.general;
 102
 103
 104    /* Pick the right frontend
 105     */
 106    if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
 107       frontend = draw->pt.front.vcache;
 108    } else {
 109       frontend = draw->pt.front.varray;
 110    }
 111
 112    frontend->prepare( frontend, prim, middle, opt );
 113
 114    frontend->run(frontend,
 115                  draw_pt_elt_func(draw),
 116                  draw_pt_elt_ptr(draw, start),
 117                  count);
 118
 119    frontend->finish( frontend );
 120
 121    return TRUE;
 122 }
 123
 124
 125 boolean draw_pt_init( struct draw_context *draw )
 126 {
 127    draw->pt.test_fse = debug_get_bool_option("DRAW_FSE", FALSE);
 128    draw->pt.no_fse = debug_get_bool_option("DRAW_NO_FSE", FALSE);
 129
 130    draw->pt.front.vcache = draw_pt_vcache( draw );
 131    if (!draw->pt.front.vcache)
 132       return FALSE;
 133
 134    draw->pt.front.varray = draw_pt_varray(draw);
 135    if (!draw->pt.front.varray)
 136       return FALSE;
 137
 138    draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
 139    if (!draw->pt.middle.fetch_emit)
 140       return FALSE;
 141
 142    draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
 143    if (!draw->pt.middle.fetch_shade_emit)
 144       return FALSE;
 145
 146    draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
 147    if (!draw->pt.middle.general)
 148       return FALSE;
 149
 150    return TRUE;
 151 }
 152
 153
 154 void draw_pt_destroy( struct draw_context *draw )
 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.vcache) {
 172       draw->pt.front.vcache->destroy( draw->pt.front.vcache );
 173       draw->pt.front.vcache = NULL;
 174    }
 175
 176    if (draw->pt.front.varray) {
 177       draw->pt.front.varray->destroy( draw->pt.front.varray );
 178       draw->pt.front.varray = NULL;
 179    }
 180 }
 181
 182
 183 /**
 184  * Debug- print the first 'count' vertices.
 185  */
 186 static void
 187 draw_print_arrays(struct draw_context *draw, uint prim, int start, uint count)
 188 {
 189    uint i;
 190
 191    debug_printf("Draw arrays(prim = %u, start = %u, count = %u)\n",
 192                 prim, start, count);
 193
 194    for (i = 0; i < count; i++) {
 195       uint ii, j;
 196
 197       if (draw->pt.user.elts) {
 198          /* indexed arrays */
 199          switch (draw->pt.user.eltSize) {
 200          case 1:
 201             {
 202                const ubyte *elem = (const ubyte *) draw->pt.user.elts;
 203                ii = elem[start + i];
 204             }
 205             break;
 206          case 2:
 207             {
 208                const ushort *elem = (const ushort *) draw->pt.user.elts;
 209                ii = elem[start + i];
 210             }
 211             break;
 212          case 4:
 213             {
 214                const uint *elem = (const uint *) draw->pt.user.elts;
 215                ii = elem[start + i];
 216             }
 217             break;
 218          default:
 219             assert(0);
 220          }
 221          debug_printf("Element[%u + %u] -> Vertex %u:\n", start, i, ii);
 222       }
 223       else {
 224          /* non-indexed arrays */
 225          ii = start + i;
 226          debug_printf("Vertex %u:\n", ii);
 227       }
 228
 229       for (j = 0; j < draw->pt.nr_vertex_elements; j++) {
 230          uint buf = draw->pt.vertex_element[j].vertex_buffer_index;
 231          ubyte *ptr = (ubyte *) draw->pt.user.vbuffer[buf];
 232          ptr += draw->pt.vertex_buffer[buf].stride * ii;
 233          ptr += draw->pt.vertex_element[j].src_offset;
 234
 235          debug_printf("  Attr %u: ", j);
 236          switch (draw->pt.vertex_element[j].src_format) {
 237          case PIPE_FORMAT_R32_FLOAT:
 238             {
 239                float *v = (float *) ptr;
 240                debug_printf("%f  @ %p\n", v[0], (void *) v);
 241             }
 242             break;
 243          case PIPE_FORMAT_R32G32_FLOAT:
 244             {
 245                float *v = (float *) ptr;
 246                debug_printf("%f %f  @ %p\n", v[0], v[1], (void *) v);
 247             }
 248             break;
 249          case PIPE_FORMAT_R32G32B32_FLOAT:
 250             {
 251                float *v = (float *) ptr;
 252                debug_printf("%f %f %f  @ %p\n", v[0], v[1], v[2], (void *) v);
 253             }
 254             break;
 255          case PIPE_FORMAT_R32G32B32A32_FLOAT:
 256             {
 257                float *v = (float *) ptr;
 258                debug_printf("%f %f %f %f  @ %p\n", v[0], v[1], v[2], v[3],
 259                             (void *) v);
 260             }
 261             break;
 262          default:
 263             debug_printf("other format (fix me)\n");
 264             ;
 265          }
 266       }
 267    }
 268 }
 269
 270
 271 /**
 272  * Draw vertex arrays
 273  * This is the main entrypoint into the drawing module.
 274  * \param prim  one of PIPE_PRIM_x
 275  * \param start  index of first vertex to draw
 276  * \param count  number of vertices to draw
 277  */
 278 void
 279 draw_arrays(struct draw_context *draw, unsigned prim,
 280             unsigned start, unsigned count)
 281 {
 282    unsigned reduced_prim = u_reduced_prim(prim);
 283    if (reduced_prim != draw->reduced_prim) {
 284       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 285       draw->reduced_prim = reduced_prim;
 286    }
 287
 288    if (0)
 289       draw_print_arrays(draw, prim, start, MIN2(count, 20));
 290
 291 #if 0
 292    {
 293       int i;
 294       debug_printf("draw_arrays(prim=%u start=%u count=%u):\n",
 295                    prim, start, count);
 296       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 297       debug_printf("Elements:\n");
 298       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 299          debug_printf("  format=%s comps=%u\n",
 300                       pf_name(draw->pt.vertex_element[i].src_format),
 301                       draw->pt.vertex_element[i].nr_components);
 302       }
 303       debug_printf("Buffers:\n");
 304       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 305          debug_printf("  stride=%u offset=%u ptr=%p\n",
 306                       draw->pt.vertex_buffer[i].stride,
 307                       draw->pt.vertex_buffer[i].buffer_offset,
 308                       draw->pt.user.vbuffer[i]);
 309       }
 310    }
 311 #endif
 312
 313    /* drawing done here: */
 314    draw_pt_arrays(draw, prim, start, count);
 315 }
 316
 317 boolean draw_pt_get_edgeflag( struct draw_context *draw,
 318                               unsigned idx )
 319 {
 320    if (draw->pt.user.edgeflag)
 321       return (draw->pt.user.edgeflag[idx/32] & (1 << (idx%32))) != 0;
 322    else
 323       return 1;
 324 }