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
  39 static unsigned trim( unsigned count, unsigned first, unsigned incr )
  40 {
  41    if (count < first)
  42       return 0;
  43    return count - (count - first) % incr;
  44 }
  45
  46
  47
  48 /* Overall we split things into:
  49  *     - frontend -- prepare fetch_elts, draw_elts - eg vcache
  50  *     - middle   -- fetch, shade, cliptest, viewport
  51  *     - pipeline -- the prim pipeline: clipping, wide lines, etc
  52  *     - backend  -- the vbuf_render provided by the driver.
  53  */
  54 static boolean
  55 draw_pt_arrays(struct draw_context *draw,
  56                unsigned prim,
  57                unsigned start,
  58                unsigned count)
  59 {
  60    struct draw_pt_front_end *frontend = NULL;
  61    struct draw_pt_middle_end *middle = NULL;
  62    unsigned opt = 0;
  63
  64    /* Sanitize primitive length:
  65     */
  66    {
  67       unsigned first, incr;
  68       draw_pt_split_prim(prim, &first, &incr);
  69       count = trim(count, first, incr);
  70       if (count < first)
  71          return TRUE;
  72    }
  73
  74    if (!draw->force_passthrough) {
  75       if (!draw->render) {
  76          opt |= PT_PIPELINE;
  77       }
  78
  79       if (draw_need_pipeline(draw,
  80                              draw->rasterizer,
  81                              prim)) {
  82          opt |= PT_PIPELINE;
  83       }
  84
  85       if (!draw->bypass_clipping && !draw->pt.test_fse) {
  86          opt |= PT_CLIPTEST;
  87       }
  88
  89       if (!draw->rasterizer->bypass_vs) {
  90          opt |= PT_SHADE;
  91       }
  92    }
  93
  94    if (opt == 0)
  95       middle = draw->pt.middle.fetch_emit;
  96    else if (opt == PT_SHADE && !draw->pt.no_fse)
  97       middle = draw->pt.middle.fetch_shade_emit;
  98    else
  99       middle = draw->pt.middle.general;
 100
 101
 102    /* Pick the right frontend
 103     */
 104    if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
 105       frontend = draw->pt.front.vcache;
 106    } else {
 107       frontend = draw->pt.front.varray;
 108    }
 109
 110    frontend->prepare( frontend, prim, middle, opt );
 111
 112    frontend->run(frontend,
 113                  draw_pt_elt_func(draw),
 114                  draw_pt_elt_ptr(draw, start),
 115                  count);
 116
 117    frontend->finish( frontend );
 118
 119    return TRUE;
 120 }
 121
 122
 123 boolean draw_pt_init( struct draw_context *draw )
 124 {
 125    draw->pt.test_fse = debug_get_bool_option("DRAW_FSE", FALSE);
 126    draw->pt.no_fse = debug_get_bool_option("DRAW_NO_FSE", FALSE);
 127
 128    draw->pt.front.vcache = draw_pt_vcache( draw );
 129    if (!draw->pt.front.vcache)
 130       return FALSE;
 131
 132    draw->pt.front.varray = draw_pt_varray(draw);
 133    if (!draw->pt.front.varray)
 134       return FALSE;
 135
 136    draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
 137    if (!draw->pt.middle.fetch_emit)
 138       return FALSE;
 139
 140    draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
 141    if (!draw->pt.middle.fetch_shade_emit)
 142       return FALSE;
 143
 144    draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
 145    if (!draw->pt.middle.general)
 146       return FALSE;
 147
 148    return TRUE;
 149 }
 150
 151
 152 void draw_pt_destroy( struct draw_context *draw )
 153 {
 154    if (draw->pt.middle.general) {
 155       draw->pt.middle.general->destroy( draw->pt.middle.general );
 156       draw->pt.middle.general = NULL;
 157    }
 158
 159    if (draw->pt.middle.fetch_emit) {
 160       draw->pt.middle.fetch_emit->destroy( draw->pt.middle.fetch_emit );
 161       draw->pt.middle.fetch_emit = NULL;
 162    }
 163
 164    if (draw->pt.middle.fetch_shade_emit) {
 165       draw->pt.middle.fetch_shade_emit->destroy( draw->pt.middle.fetch_shade_emit );
 166       draw->pt.middle.fetch_shade_emit = NULL;
 167    }
 168
 169    if (draw->pt.front.vcache) {
 170       draw->pt.front.vcache->destroy( draw->pt.front.vcache );
 171       draw->pt.front.vcache = NULL;
 172    }
 173
 174    if (draw->pt.front.varray) {
 175       draw->pt.front.varray->destroy( draw->pt.front.varray );
 176       draw->pt.front.varray = NULL;
 177    }
 178 }
 179
 180
 181
 182
 183 /**
 184  * Draw vertex arrays
 185  * This is the main entrypoint into the drawing module.
 186  * \param prim  one of PIPE_PRIM_x
 187  * \param start  index of first vertex to draw
 188  * \param count  number of vertices to draw
 189  */
 190 void
 191 draw_arrays(struct draw_context *draw, unsigned prim,
 192             unsigned start, unsigned count)
 193 {
 194    unsigned reduced_prim = draw_pt_reduced_prim(prim);
 195    if (reduced_prim != draw->reduced_prim) {
 196       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 197       draw->reduced_prim = reduced_prim;
 198    }
 199
 200 #if 0
 201    {
 202       int i;
 203       debug_printf("draw_arrays(prim=%u start=%u count=%u):\n",
 204                    prim, start, count);
 205       tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
 206       debug_printf("Elements:\n");
 207       for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
 208          debug_printf("  format=%s comps=%u\n",
 209                       pf_name(draw->pt.vertex_element[i].src_format),
 210                       draw->pt.vertex_element[i].nr_components);
 211       }
 212       debug_printf("Buffers:\n");
 213       for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 214          debug_printf("  pitch=%u offset=%u ptr=%p\n",
 215                       draw->pt.vertex_buffer[i].pitch,
 216                       draw->pt.vertex_buffer[i].buffer_offset,
 217                       draw->pt.user.vbuffer[i]);
 218       }
 219    }
 220 #endif
 221
 222    /* drawing done here: */
 223    draw_pt_arrays(draw, prim, start, count);
 224 }
 225
 226 boolean draw_pt_get_edgeflag( struct draw_context *draw,
 227                               unsigned idx )
 228 {
 229    if (draw->pt.user.edgeflag)
 230       return (draw->pt.user.edgeflag[idx/32] & (1 << (idx%32))) != 0;
 231    else
 232       return 1;
 233 }