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
  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       if (!draw->rasterizer->bypass_vs) {
  91          opt |= PT_SHADE;
  92       }
  93    }
  94
  95    if (opt == 0)
  96       middle = draw->pt.middle.fetch_emit;
  97    else if (opt == PT_SHADE && !draw->pt.no_fse)
  98       middle = draw->pt.middle.fetch_shade_emit;
  99    else
 100       middle = draw->pt.middle.general;
 101
 102
 103    /* Pick the right frontend
 104     */
 105    if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
 106       frontend = draw->pt.front.vcache;
 107    } else {
 108       frontend = draw->pt.front.varray;
 109    }
 110
 111    frontend->prepare( frontend, prim, middle, opt );
 112
 113    frontend->run(frontend,
 114                  draw_pt_elt_func(draw),
 115                  draw_pt_elt_ptr(draw, start),
 116                  count);
 117
 118    frontend->finish( frontend );
 119
 120    return TRUE;
 121 }
 122
 123
 124 boolean draw_pt_init( struct draw_context *draw )
 125 {
 126    draw->pt.test_fse = debug_get_bool_option("DRAW_FSE", FALSE);
 127    draw->pt.no_fse = debug_get_bool_option("DRAW_NO_FSE", FALSE);
 128
 129    draw->pt.front.vcache = draw_pt_vcache( draw );
 130    if (!draw->pt.front.vcache)
 131       return FALSE;
 132
 133    draw->pt.front.varray = draw_pt_varray(draw);
 134    if (!draw->pt.front.varray)
 135       return FALSE;
 136
 137    draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
 138    if (!draw->pt.middle.fetch_emit)
 139       return FALSE;
 140
 141    draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
 142    if (!draw->pt.middle.fetch_shade_emit)
 143       return FALSE;
 144
 145    draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
 146    if (!draw->pt.middle.general)
 147       return FALSE;
 148
 149    return TRUE;
 150 }
 151
 152
 153 void draw_pt_destroy( struct draw_context *draw )
 154 {
 155    if (draw->pt.middle.general) {
 156       draw->pt.middle.general->destroy( draw->pt.middle.general );
 157       draw->pt.middle.general = NULL;
 158    }
 159
 160    if (draw->pt.middle.fetch_emit) {
 161       draw->pt.middle.fetch_emit->destroy( draw->pt.middle.fetch_emit );
 162       draw->pt.middle.fetch_emit = NULL;
 163    }
 164
 165    if (draw->pt.middle.fetch_shade_emit) {
 166       draw->pt.middle.fetch_shade_emit->destroy( draw->pt.middle.fetch_shade_emit );
 167       draw->pt.middle.fetch_shade_emit = NULL;
 168    }
 169
 170    if (draw->pt.front.vcache) {
 171       draw->pt.front.vcache->destroy( draw->pt.front.vcache );
 172       draw->pt.front.vcache = NULL;
 173    }
 174
 175    if (draw->pt.front.varray) {
 176       draw->pt.front.varray->destroy( draw->pt.front.varray );
 177       draw->pt.front.varray = NULL;
 178    }
 179 }
 180
 181
 182 /**
 183  * Debug- print the first 'count' vertices.
 184  */
 185 static void
 186 draw_print_arrays(struct draw_context *draw, uint prim, int start, uint count)
 187 {
 188    uint i;
 189
 190    debug_printf("Draw arrays(prim = %u, start = %u, count = %u)\n",
 191                 prim, start, count);
 192
 193    for (i = 0; i < count; i++) {
 194       uint ii, j;
 195
 196       if (draw->pt.user.elts) {
 197          /* indexed arrays */
 198          switch (draw->pt.user.eltSize) {
 199          case 1:
 200             {
 201                const ubyte *elem = (const ubyte *) draw->pt.user.elts;
 202                ii = elem[start + i];
 203             }
 204             break;
 205          case 2:
 206             {
 207                const ushort *elem = (const ushort *) draw->pt.user.elts;
 208                ii = elem[start + i];
 209             }
 210             break;
 211          case 4:
 212             {
 213                const uint *elem = (const uint *) draw->pt.user.elts;
 214                ii = elem[start + i];
 215             }
 216             break;
 217          default:
 218             assert(0);
 219          }
 220          debug_printf("Element[%u + %u] -> Vertex %u:\n", start, i, ii);
 221       }
 222       else {
 223          /* non-indexed arrays */
 224          ii = start + i;
 225          debug_printf("Vertex %u:\n", ii);
 226       }
 227
 228       for (j = 0; j < draw->pt.nr_vertex_elements; j++) {
 229          uint buf = draw->pt.vertex_element[j].vertex_buffer_index;
 230          ubyte *ptr = (ubyte *) draw->pt.user.vbuffer[buf];
 231          ptr += draw->pt.vertex_buffer[buf].pitch * ii;
 232          ptr += draw->pt.vertex_element[j].src_offset;
 233
 234          debug_printf("  Attr %u: ", j);
 235          switch (draw->pt.vertex_element[j].src_format) {
 236          case PIPE_FORMAT_R32_FLOAT:
 237             {
 238                float *v = (float *) ptr;
 239                debug_printf("%f  @ %p\n", v[0], (void *) v);
 240             }
 241             break;
 242          case PIPE_FORMAT_R32G32_FLOAT:
 243             {
 244                float *v = (float *) ptr;
 245                debug_printf("%f %f  @ %p\n", v[0], v[1], (void *) v);
 246             }
 247             break;
 248          case PIPE_FORMAT_R32G32B32_FLOAT:
 249             {
 250                float *v = (float *) ptr;
 251                debug_printf("%f %f %f  @ %p\n", v[0], v[1], v[2], (void *) v);
 252             }
 253             break;
 254          case PIPE_FORMAT_R32G32B32A32_FLOAT:
 255             {
 256                float *v = (float *) ptr;
 257                debug_printf("%f %f %f %f  @ %p\n", v[0], v[1], v[2], v[3],
 258                             (void *) v);
 259             }
 260             break;
 261          default:
 262             debug_printf("other format (fix me)\n");
 263             ;
 264          }
 265       }
 266    }
 267 }
 268
 269
 270 /**
 271  * Draw vertex arrays
 272  * This is the main entrypoint into the drawing module.
 273  * \param prim  one of PIPE_PRIM_x
 274  * \param start  index of first vertex to draw
 275  * \param count  number of vertices to draw
 276  */
 277 void
 278 draw_arrays(struct draw_context *draw, unsigned prim,
 279             unsigned start, unsigned count)
 280 {
 281    unsigned reduced_prim = draw_pt_reduced_prim(prim);
 282    if (reduced_prim != draw->reduced_prim) {
 283       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 284       draw->reduced_prim = reduced_prim;
 285    }
 286
 287    if (0)
 288       draw_print_arrays(draw, prim, start, MIN2(count, 20));
 289
 290 #if 0
 291    {
 292       int i;
 293       debug_printf("draw_arrays(prim=%u start=%u count=%u):\n",
 294                    prim, start, count);
 295       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 296       debug_printf("Elements:\n");
 297       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 298          debug_printf("  format=%s comps=%u\n",
 299                       pf_name(draw->pt.vertex_element[i].src_format),
 300                       draw->pt.vertex_element[i].nr_components);
 301       }
 302       debug_printf("Buffers:\n");
 303       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 304          debug_printf("  pitch=%u offset=%u ptr=%p\n",
 305                       draw->pt.vertex_buffer[i].pitch,
 306                       draw->pt.vertex_buffer[i].buffer_offset,
 307                       draw->pt.user.vbuffer[i]);
 308       }
 309    }
 310 #endif
 311
 312    /* drawing done here: */
 313    draw_pt_arrays(draw, prim, start, count);
 314 }
 315
 316 boolean draw_pt_get_edgeflag( struct draw_context *draw,
 317                               unsigned idx )
 318 {
 319    if (draw->pt.user.edgeflag)
 320       return (draw->pt.user.edgeflag[idx/32] & (1 << (idx%32))) != 0;
 321    else
 322       return 1;
 323 }