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 static unsigned trim( unsigned count, unsigned first, unsigned incr )
  41 {
  42    if (count < first)
  43       return 0;
  44    return count - (count - first) % incr;
  45 }
  46
  47
  48
  49 /* Overall we split things into:
  50  *     - frontend -- prepare fetch_elts, draw_elts - eg vcache
  51  *     - middle   -- fetch, shade, cliptest, viewport
  52  *     - pipeline -- the prim pipeline: clipping, wide lines, etc
  53  *     - backend  -- the vbuf_render provided by the driver.
  54  */
  55 static boolean
  56 draw_pt_arrays(struct draw_context *draw,
  57                unsigned prim,
  58                unsigned start,
  59                unsigned count)
  60 {
  61    struct draw_pt_front_end *frontend = NULL;
  62    struct draw_pt_middle_end *middle = NULL;
  63    unsigned opt = 0;
  64
  65    /* Sanitize primitive length:
  66     */
  67    {
  68       unsigned first, incr;
  69       draw_pt_split_prim(prim, &first, &incr);
  70       count = trim(count, first, incr);
  71       if (count < first)
  72          return TRUE;
  73    }
  74
  75    if (!draw->force_passthrough) {
  76       if (!draw->render) {
  77          opt |= PT_PIPELINE;
  78       }
  79
  80       if (draw_need_pipeline(draw,
  81                              draw->rasterizer,
  82                              prim)) {
  83          opt |= PT_PIPELINE;
  84       }
  85
  86       if (!draw->bypass_clipping && !draw->pt.test_fse) {
  87          opt |= PT_CLIPTEST;
  88       }
  89
  90       opt |= PT_SHADE;
  91    }
  92
  93    if (opt == 0)
  94       middle = draw->pt.middle.fetch_emit;
  95    else if (opt == PT_SHADE && !draw->pt.no_fse)
  96       middle = draw->pt.middle.fetch_shade_emit;
  97    else
  98       middle = draw->pt.middle.general;
  99
 100
 101    /* Pick the right frontend
 102     */
 103    if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
 104       frontend = draw->pt.front.vcache;
 105    } else {
 106       frontend = draw->pt.front.varray;
 107    }
 108
 109    frontend->prepare( frontend, prim, middle, opt );
 110
 111    frontend->run(frontend,
 112                  draw_pt_elt_func(draw),
 113                  draw_pt_elt_ptr(draw, start),
 114                  count);
 115
 116    frontend->finish( frontend );
 117
 118    return TRUE;
 119 }
 120
 121
 122 boolean draw_pt_init( struct draw_context *draw )
 123 {
 124    draw->pt.test_fse = debug_get_bool_option("DRAW_FSE", FALSE);
 125    draw->pt.no_fse = debug_get_bool_option("DRAW_NO_FSE", FALSE);
 126
 127    draw->pt.front.vcache = draw_pt_vcache( draw );
 128    if (!draw->pt.front.vcache)
 129       return FALSE;
 130
 131    draw->pt.front.varray = draw_pt_varray(draw);
 132    if (!draw->pt.front.varray)
 133       return FALSE;
 134
 135    draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
 136    if (!draw->pt.middle.fetch_emit)
 137       return FALSE;
 138
 139    draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
 140    if (!draw->pt.middle.fetch_shade_emit)
 141       return FALSE;
 142
 143 #if HAVE_LLVM
 144    draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit_llvm( draw );
 145 #else
 146    draw->pt.middle.general = NULL;
 147 #endif
 148
 149    if (!draw->pt.middle.general)
 150       draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
 151    if (!draw->pt.middle.general)
 152       return FALSE;
 153
 154    return TRUE;
 155 }
 156
 157
 158 void draw_pt_destroy( struct draw_context *draw )
 159 {
 160    if (draw->pt.middle.general) {
 161       draw->pt.middle.general->destroy( draw->pt.middle.general );
 162       draw->pt.middle.general = NULL;
 163    }
 164
 165    if (draw->pt.middle.fetch_emit) {
 166       draw->pt.middle.fetch_emit->destroy( draw->pt.middle.fetch_emit );
 167       draw->pt.middle.fetch_emit = NULL;
 168    }
 169
 170    if (draw->pt.middle.fetch_shade_emit) {
 171       draw->pt.middle.fetch_shade_emit->destroy( draw->pt.middle.fetch_shade_emit );
 172       draw->pt.middle.fetch_shade_emit = NULL;
 173    }
 174
 175    if (draw->pt.front.vcache) {
 176       draw->pt.front.vcache->destroy( draw->pt.front.vcache );
 177       draw->pt.front.vcache = NULL;
 178    }
 179
 180    if (draw->pt.front.varray) {
 181       draw->pt.front.varray->destroy( draw->pt.front.varray );
 182       draw->pt.front.varray = NULL;
 183    }
 184 }
 185
 186
 187 /**
 188  * Debug- print the first 'count' vertices.
 189  */
 190 static void
 191 draw_print_arrays(struct draw_context *draw, uint prim, int start, uint count)
 192 {
 193    uint i;
 194
 195    debug_printf("Draw arrays(prim = %u, start = %u, count = %u)\n",
 196                 prim, start, count);
 197
 198    for (i = 0; i < count; i++) {
 199       uint ii = 0;
 200       uint j;
 201
 202       if (draw->pt.user.elts) {
 203          /* indexed arrays */
 204          switch (draw->pt.user.eltSize) {
 205          case 1:
 206             {
 207                const ubyte *elem = (const ubyte *) draw->pt.user.elts;
 208                ii = elem[start + i];
 209             }
 210             break;
 211          case 2:
 212             {
 213                const ushort *elem = (const ushort *) draw->pt.user.elts;
 214                ii = elem[start + i];
 215             }
 216             break;
 217          case 4:
 218             {
 219                const uint *elem = (const uint *) draw->pt.user.elts;
 220                ii = elem[start + i];
 221             }
 222             break;
 223          default:
 224             assert(0);
 225          }
 226          debug_printf("Element[%u + %u] -> Vertex %u:\n", start, i, ii);
 227       }
 228       else {
 229          /* non-indexed arrays */
 230          ii = start + i;
 231          debug_printf("Vertex %u:\n", ii);
 232       }
 233
 234       for (j = 0; j < draw->pt.nr_vertex_elements; j++) {
 235          uint buf = draw->pt.vertex_element[j].vertex_buffer_index;
 236          ubyte *ptr = (ubyte *) draw->pt.user.vbuffer[buf];
 237          ptr += draw->pt.vertex_buffer[buf].stride * ii;
 238          ptr += draw->pt.vertex_element[j].src_offset;
 239
 240          debug_printf("  Attr %u: ", j);
 241          switch (draw->pt.vertex_element[j].src_format) {
 242          case PIPE_FORMAT_R32_FLOAT:
 243             {
 244                float *v = (float *) ptr;
 245                debug_printf("%f  @ %p\n", v[0], (void *) v);
 246             }
 247             break;
 248          case PIPE_FORMAT_R32G32_FLOAT:
 249             {
 250                float *v = (float *) ptr;
 251                debug_printf("%f %f  @ %p\n", v[0], v[1], (void *) v);
 252             }
 253             break;
 254          case PIPE_FORMAT_R32G32B32_FLOAT:
 255             {
 256                float *v = (float *) ptr;
 257                debug_printf("%f %f %f  @ %p\n", v[0], v[1], v[2], (void *) v);
 258             }
 259             break;
 260          case PIPE_FORMAT_R32G32B32A32_FLOAT:
 261             {
 262                float *v = (float *) ptr;
 263                debug_printf("%f %f %f %f  @ %p\n", v[0], v[1], v[2], v[3],
 264                             (void *) v);
 265             }
 266             break;
 267          default:
 268             debug_printf("other format (fix me)\n");
 269             ;
 270          }
 271       }
 272    }
 273 }
 274
 275
 276 /**
 277  * Draw vertex arrays
 278  * This is the main entrypoint into the drawing module.
 279  * \param prim  one of PIPE_PRIM_x
 280  * \param start  index of first vertex to draw
 281  * \param count  number of vertices to draw
 282  */
 283 void
 284 draw_arrays(struct draw_context *draw, unsigned prim,
 285             unsigned start, unsigned count)
 286 {
 287    draw_arrays_instanced(draw, prim, start, count, 0, 1);
 288 }
 289
 290 void
 291 draw_arrays_instanced(struct draw_context *draw,
 292                       unsigned mode,
 293                       unsigned start,
 294                       unsigned count,
 295                       unsigned startInstance,
 296                       unsigned instanceCount)
 297 {
 298    unsigned reduced_prim = u_reduced_prim(mode);
 299    unsigned instance;
 300
 301    if (reduced_prim != draw->reduced_prim) {
 302       draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 303       draw->reduced_prim = reduced_prim;
 304    }
 305
 306    if (0)
 307       draw_print_arrays(draw, mode, start, MIN2(count, 20));
 308
 309 #if 0
 310    {
 311       int i;
 312       debug_printf("draw_arrays(mode=%u start=%u count=%u):\n",
 313                    mode, start, count);
 314       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 315       debug_printf("Elements:\n");
 316       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 317          debug_printf("  format=%s\n",
 318                       util_format_name(draw->pt.vertex_element[i].src_format));
 319       }
 320       debug_printf("Buffers:\n");
 321       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 322          debug_printf("  stride=%u offset=%u ptr=%p\n",
 323                       draw->pt.vertex_buffer[i].stride,
 324                       draw->pt.vertex_buffer[i].buffer_offset,
 325                       draw->pt.user.vbuffer[i]);
 326       }
 327    }
 328 #endif
 329
 330    for (instance = 0; instance < instanceCount; instance++) {
 331       draw->instance_id = instance + startInstance;
 332       draw_pt_arrays(draw, mode, start, count);
 333    }
 334 }