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
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  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
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  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    draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit_llvm( draw );
 144    if (!draw->pt.middle.general)
 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 = 0;
 195       uint 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    draw_arrays_instanced(draw, prim, start, count, 0, 1);
 283 }
 284
 285 void
 286 draw_arrays_instanced(struct draw_context *draw,
 287                       unsigned mode,
 288                       unsigned start,
 289                       unsigned count,
 290                       unsigned startInstance,
 291                       unsigned instanceCount)
 292 {
 293    unsigned reduced_prim = u_reduced_prim(mode);
 294    unsigned instance;
 295
 296    if (reduced_prim != draw->reduced_prim) {
 297       draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 298       draw->reduced_prim = reduced_prim;
 299    }
 300
 301    if (0)
 302       draw_print_arrays(draw, mode, start, MIN2(count, 20));
 303
 304 #if 0
 305    {
 306       int i;
 307       debug_printf("draw_arrays(mode=%u start=%u count=%u):\n",
 308                    mode, start, count);
 309       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 310       debug_printf("Elements:\n");
 311       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 312          debug_printf("  format=%s\n",
 313                       util_format_name(draw->pt.vertex_element[i].src_format));
 314       }
 315       debug_printf("Buffers:\n");
 316       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 317          debug_printf("  stride=%u offset=%u ptr=%p\n",
 318                       draw->pt.vertex_buffer[i].stride,
 319                       draw->pt.vertex_buffer[i].buffer_offset,
 320                       draw->pt.user.vbuffer[i]);
 321       }
 322    }
 323 #endif
 324
 325    for (instance = 0; instance < instanceCount; instance++) {
 326       draw->instance_id = instance + startInstance;
 327       draw_pt_arrays(draw, mode, start, count);
 328    }
 329 }