src/gallium/drivers/svga/svga_pipe_draw.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26
  27 #include "util/u_format.h"
  28 #include "util/u_inlines.h"
  29 #include "util/u_prim.h"
  30 #include "util/u_prim_restart.h"
  31 #include "util/u_time.h"
  32 #include "util/u_upload_mgr.h"
  33 #include "indices/u_indices.h"
  34
  35 #include "svga_hw_reg.h"
  36 #include "svga_cmd.h"
  37 #include "svga_context.h"
  38 #include "svga_screen.h"
  39 #include "svga_draw.h"
  40 #include "svga_shader.h"
  41 #include "svga_state.h"
  42 #include "svga_surface.h"
  43 #include "svga_swtnl.h"
  44 #include "svga_debug.h"
  45 #include "svga_resource_buffer.h"
  46
  47 static enum pipe_error
  48 retry_draw_range_elements( struct svga_context *svga,
  49                            struct pipe_resource *index_buffer,
  50                            unsigned index_size,
  51                            int index_bias,
  52                            unsigned min_index,
  53                            unsigned max_index,
  54                            enum pipe_prim_type prim,
  55                            unsigned start,
  56                            unsigned count,
  57                            unsigned start_instance,
  58                            unsigned instance_count,
  59                            boolean do_retry )
  60 {
  61    enum pipe_error ret = PIPE_OK;
  62
  63    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWELEMENTS);
  64
  65    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
  66
  67    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
  68    if (ret != PIPE_OK)
  69       goto retry;
  70
  71    /** determine if flatshade is to be used after svga_update_state()
  72     *  in case the fragment shader is changed.
  73     */
  74    svga_hwtnl_set_flatshade(svga->hwtnl,
  75                             svga->curr.rast->templ.flatshade ||
  76                             svga->state.hw_draw.fs->uses_flat_interp,
  77                             svga->curr.rast->templ.flatshade_first);
  78
  79    ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
  80                                          index_buffer, index_size, index_bias,
  81                                          min_index, max_index,
  82                                          prim, start, count,
  83                                          start_instance, instance_count);
  84    if (ret != PIPE_OK)
  85       goto retry;
  86
  87    goto done;
  88
  89 retry:
  90    svga_context_flush( svga, NULL );
  91
  92    if (do_retry)
  93    {
  94       ret = retry_draw_range_elements(svga,
  95                                       index_buffer, index_size, index_bias,
  96                                       min_index, max_index,
  97                                       prim, start, count,
  98                                       start_instance, instance_count, FALSE);
  99    }
 100
 101 done:
 102    SVGA_STATS_TIME_POP(svga_sws(svga));
 103    return ret;
 104 }
 105
 106
 107 static enum pipe_error
 108 retry_draw_arrays( struct svga_context *svga,
 109                    enum pipe_prim_type prim, unsigned start, unsigned count,
 110                    unsigned start_instance, unsigned instance_count,
 111                    boolean do_retry )
 112 {
 113    enum pipe_error ret;
 114
 115    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWARRAYS);
 116
 117    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 118
 119    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 120    if (ret != PIPE_OK)
 121       goto retry;
 122
 123    /** determine if flatshade is to be used after svga_update_state()
 124     *  in case the fragment shader is changed.
 125     */
 126    svga_hwtnl_set_flatshade(svga->hwtnl,
 127                             svga->curr.rast->templ.flatshade ||
 128                             svga->state.hw_draw.fs->uses_flat_interp,
 129                             svga->curr.rast->templ.flatshade_first);
 130
 131    ret = svga_hwtnl_draw_arrays(svga->hwtnl, prim, start, count,
 132                                 start_instance, instance_count);
 133    if (ret != PIPE_OK)
 134       goto retry;
 135
 136    goto done;
 137
 138 retry:
 139    if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
 140    {
 141       svga_context_flush( svga, NULL );
 142
 143       ret = retry_draw_arrays(svga, prim, start, count,
 144                               start_instance, instance_count,
 145                               FALSE);
 146    }
 147
 148 done:
 149    SVGA_STATS_TIME_POP(svga_sws(svga));
 150    return ret;
 151 }
 152
 153
 154 /**
 155  * Determine if we need to implement primitive restart with a fallback
 156  * path which breaks the original primitive into sub-primitive at the
 157  * restart indexes.
 158  */
 159 static boolean
 160 need_fallback_prim_restart(const struct svga_context *svga,
 161                            const struct pipe_draw_info *info)
 162 {
 163    if (info->primitive_restart && info->indexed) {
 164       if (!svga_have_vgpu10(svga))
 165          return TRUE;
 166       else if (!svga->state.sw.need_swtnl) {
 167          if (svga->curr.ib.index_size == 1)
 168             return TRUE; /* no device support for 1-byte indexes */
 169          else if (svga->curr.ib.index_size == 2)
 170             return info->restart_index != 0xffff;
 171          else
 172             return info->restart_index != 0xffffffff;
 173       }
 174    }
 175
 176    return FALSE;
 177 }
 178
 179
 180 static void
 181 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 182 {
 183    struct svga_context *svga = svga_context( pipe );
 184    unsigned reduced_prim = u_reduced_prim( info->mode );
 185    unsigned count = info->count;
 186    enum pipe_error ret = 0;
 187    boolean needed_swtnl;
 188
 189    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWVBO);
 190
 191    svga->hud.num_draw_calls++;  /* for SVGA_QUERY_NUM_DRAW_CALLS */
 192
 193    if (u_reduced_prim(info->mode) == PIPE_PRIM_TRIANGLES &&
 194        svga->curr.rast->templ.cull_face == PIPE_FACE_FRONT_AND_BACK)
 195       goto done;
 196
 197    /*
 198     * Mark currently bound target surfaces as dirty
 199     * doesn't really matter if it is done before drawing.
 200     *
 201     * TODO If we ever normaly return something other then
 202     * true we should not mark it as dirty then.
 203     */
 204    svga_mark_surfaces_dirty(svga_context(pipe));
 205
 206    if (svga->curr.reduced_prim != reduced_prim) {
 207       svga->curr.reduced_prim = reduced_prim;
 208       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 209    }
 210
 211    if (need_fallback_prim_restart(svga, info)) {
 212       enum pipe_error r;
 213       r = util_draw_vbo_without_prim_restart(pipe, &svga->curr.ib, info);
 214       assert(r == PIPE_OK);
 215       (void) r;
 216       goto done;
 217    }
 218
 219    if (!u_trim_pipe_prim( info->mode, &count ))
 220       goto done;
 221
 222    needed_swtnl = svga->state.sw.need_swtnl;
 223
 224    svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
 225
 226    if (svga->state.sw.need_swtnl) {
 227       svga->hud.num_fallbacks++;  /* for SVGA_QUERY_NUM_FALLBACKS */
 228       if (!needed_swtnl) {
 229          /*
 230           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 231           * currently bound vertex buffers, some of which may already be
 232           * referenced in the current command buffer as result of previous HW
 233           * TNL. So flush now, to prevent the context to flush while a referred
 234           * vertex buffer is mapped.
 235           */
 236
 237          svga_context_flush(svga, NULL);
 238       }
 239
 240       /* Avoid leaking the previous hwtnl bias to swtnl */
 241       svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
 242       ret = svga_swtnl_draw_vbo( svga, info );
 243    }
 244    else {
 245       if (info->indexed && svga->curr.ib.buffer) {
 246          unsigned offset;
 247
 248          assert(svga->curr.ib.offset % svga->curr.ib.index_size == 0);
 249          offset = svga->curr.ib.offset / svga->curr.ib.index_size;
 250
 251          ret = retry_draw_range_elements( svga,
 252                                           svga->curr.ib.buffer,
 253                                           svga->curr.ib.index_size,
 254                                           info->index_bias,
 255                                           info->min_index,
 256                                           info->max_index,
 257                                           info->mode,
 258                                           info->start + offset,
 259                                           count,
 260                                           info->start_instance,
 261                                           info->instance_count,
 262                                           TRUE );
 263       }
 264       else {
 265          ret = retry_draw_arrays(svga, info->mode, info->start, count,
 266                                  info->start_instance, info->instance_count,
 267                                  TRUE);
 268       }
 269    }
 270
 271    /* XXX: Silence warnings, do something sensible here? */
 272    (void)ret;
 273
 274    if (SVGA_DEBUG & DEBUG_FLUSH) {
 275       svga_hwtnl_flush_retry( svga );
 276       svga_context_flush(svga, NULL);
 277    }
 278
 279 done:
 280    SVGA_STATS_TIME_POP(svga_sws(svga));
 281 ;
 282 }
 283
 284
 285 void svga_init_draw_functions( struct svga_context *svga )
 286 {
 287    svga->pipe.draw_vbo = svga_draw_vbo;
 288 }