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_helpers.h"
  29 #include "util/u_inlines.h"
  30 #include "util/u_prim.h"
  31 #include "util/u_prim_restart.h"
  32 #include "util/u_time.h"
  33 #include "util/u_upload_mgr.h"
  34 #include "indices/u_indices.h"
  35
  36 #include "svga_hw_reg.h"
  37 #include "svga_cmd.h"
  38 #include "svga_context.h"
  39 #include "svga_screen.h"
  40 #include "svga_draw.h"
  41 #include "svga_shader.h"
  42 #include "svga_state.h"
  43 #include "svga_surface.h"
  44 #include "svga_swtnl.h"
  45 #include "svga_debug.h"
  46 #include "svga_resource_buffer.h"
  47
  48 static enum pipe_error
  49 retry_draw_range_elements( struct svga_context *svga,
  50                            struct pipe_resource *index_buffer,
  51                            unsigned index_size,
  52                            int index_bias,
  53                            unsigned min_index,
  54                            unsigned max_index,
  55                            enum pipe_prim_type prim,
  56                            unsigned start,
  57                            unsigned count,
  58                            unsigned start_instance,
  59                            unsigned instance_count,
  60                            boolean do_retry )
  61 {
  62    enum pipe_error ret = PIPE_OK;
  63
  64    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWELEMENTS);
  65
  66    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
  67
  68    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
  69    if (ret != PIPE_OK)
  70       goto retry;
  71
  72    /** determine if flatshade is to be used after svga_update_state()
  73     *  in case the fragment shader is changed.
  74     */
  75    svga_hwtnl_set_flatshade(svga->hwtnl,
  76                             svga->curr.rast->templ.flatshade ||
  77                             svga->state.hw_draw.fs->uses_flat_interp,
  78                             svga->curr.rast->templ.flatshade_first);
  79
  80    ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
  81                                          index_buffer, index_size, index_bias,
  82                                          min_index, max_index,
  83                                          prim, start, count,
  84                                          start_instance, instance_count);
  85    if (ret != PIPE_OK)
  86       goto retry;
  87
  88    goto done;
  89
  90 retry:
  91    svga_context_flush( svga, NULL );
  92
  93    if (do_retry)
  94    {
  95       ret = retry_draw_range_elements(svga,
  96                                       index_buffer, index_size, index_bias,
  97                                       min_index, max_index,
  98                                       prim, start, count,
  99                                       start_instance, instance_count, FALSE);
 100    }
 101
 102 done:
 103    SVGA_STATS_TIME_POP(svga_sws(svga));
 104    return ret;
 105 }
 106
 107
 108 static enum pipe_error
 109 retry_draw_arrays( struct svga_context *svga,
 110                    enum pipe_prim_type prim, unsigned start, unsigned count,
 111                    unsigned start_instance, unsigned instance_count,
 112                    boolean do_retry )
 113 {
 114    enum pipe_error ret;
 115
 116    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWARRAYS);
 117
 118    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 119
 120    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 121    if (ret != PIPE_OK)
 122       goto retry;
 123
 124    /** determine if flatshade is to be used after svga_update_state()
 125     *  in case the fragment shader is changed.
 126     */
 127    svga_hwtnl_set_flatshade(svga->hwtnl,
 128                             svga->curr.rast->templ.flatshade ||
 129                             svga->state.hw_draw.fs->uses_flat_interp,
 130                             svga->curr.rast->templ.flatshade_first);
 131
 132    ret = svga_hwtnl_draw_arrays(svga->hwtnl, prim, start, count,
 133                                 start_instance, instance_count);
 134    if (ret != PIPE_OK)
 135       goto retry;
 136
 137    goto done;
 138
 139 retry:
 140    if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
 141    {
 142       svga_context_flush( svga, NULL );
 143
 144       ret = retry_draw_arrays(svga, prim, start, count,
 145                               start_instance, instance_count,
 146                               FALSE);
 147    }
 148
 149 done:
 150    SVGA_STATS_TIME_POP(svga_sws(svga));
 151    return ret;
 152 }
 153
 154
 155 /**
 156  * Determine if we need to implement primitive restart with a fallback
 157  * path which breaks the original primitive into sub-primitive at the
 158  * restart indexes.
 159  */
 160 static boolean
 161 need_fallback_prim_restart(const struct svga_context *svga,
 162                            const struct pipe_draw_info *info)
 163 {
 164    if (info->primitive_restart && info->indexed) {
 165       if (!svga_have_vgpu10(svga))
 166          return TRUE;
 167       else if (!svga->state.sw.need_swtnl) {
 168          if (svga->curr.ib.index_size == 1)
 169             return TRUE; /* no device support for 1-byte indexes */
 170          else if (svga->curr.ib.index_size == 2)
 171             return info->restart_index != 0xffff;
 172          else
 173             return info->restart_index != 0xffffffff;
 174       }
 175    }
 176
 177    return FALSE;
 178 }
 179
 180
 181 static void
 182 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 183 {
 184    struct svga_context *svga = svga_context( pipe );
 185    unsigned reduced_prim = u_reduced_prim( info->mode );
 186    unsigned count = info->count;
 187    enum pipe_error ret = 0;
 188    boolean needed_swtnl;
 189
 190    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWVBO);
 191
 192    svga->hud.num_draw_calls++;  /* for SVGA_QUERY_NUM_DRAW_CALLS */
 193
 194    if (u_reduced_prim(info->mode) == PIPE_PRIM_TRIANGLES &&
 195        svga->curr.rast->templ.cull_face == PIPE_FACE_FRONT_AND_BACK)
 196       goto done;
 197
 198    /* Upload a user index buffer. */
 199    struct pipe_index_buffer ibuffer_saved = {};
 200    if (info->indexed && svga->curr.ib.user_buffer &&
 201        !util_save_and_upload_index_buffer(pipe, info, &svga->curr.ib,
 202                                           &ibuffer_saved)) {
 203       return;
 204    }
 205
 206    /*
 207     * Mark currently bound target surfaces as dirty
 208     * doesn't really matter if it is done before drawing.
 209     *
 210     * TODO If we ever normaly return something other then
 211     * true we should not mark it as dirty then.
 212     */
 213    svga_mark_surfaces_dirty(svga_context(pipe));
 214
 215    if (svga->curr.reduced_prim != reduced_prim) {
 216       svga->curr.reduced_prim = reduced_prim;
 217       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 218    }
 219
 220    if (need_fallback_prim_restart(svga, info)) {
 221       enum pipe_error r;
 222       r = util_draw_vbo_without_prim_restart(pipe, &svga->curr.ib, info);
 223       assert(r == PIPE_OK);
 224       (void) r;
 225       goto done;
 226    }
 227
 228    if (!u_trim_pipe_prim( info->mode, &count ))
 229       goto done;
 230
 231    needed_swtnl = svga->state.sw.need_swtnl;
 232
 233    svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
 234
 235    if (svga->state.sw.need_swtnl) {
 236       svga->hud.num_fallbacks++;  /* for SVGA_QUERY_NUM_FALLBACKS */
 237       if (!needed_swtnl) {
 238          /*
 239           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 240           * currently bound vertex buffers, some of which may already be
 241           * referenced in the current command buffer as result of previous HW
 242           * TNL. So flush now, to prevent the context to flush while a referred
 243           * vertex buffer is mapped.
 244           */
 245
 246          svga_context_flush(svga, NULL);
 247       }
 248
 249       /* Avoid leaking the previous hwtnl bias to swtnl */
 250       svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
 251       ret = svga_swtnl_draw_vbo( svga, info );
 252    }
 253    else {
 254       if (info->indexed && svga->curr.ib.buffer) {
 255          unsigned offset;
 256
 257          assert(svga->curr.ib.offset % svga->curr.ib.index_size == 0);
 258          offset = svga->curr.ib.offset / svga->curr.ib.index_size;
 259
 260          ret = retry_draw_range_elements( svga,
 261                                           svga->curr.ib.buffer,
 262                                           svga->curr.ib.index_size,
 263                                           info->index_bias,
 264                                           info->min_index,
 265                                           info->max_index,
 266                                           info->mode,
 267                                           info->start + offset,
 268                                           count,
 269                                           info->start_instance,
 270                                           info->instance_count,
 271                                           TRUE );
 272       }
 273       else {
 274          ret = retry_draw_arrays(svga, info->mode, info->start, count,
 275                                  info->start_instance, info->instance_count,
 276                                  TRUE);
 277       }
 278    }
 279
 280    /* XXX: Silence warnings, do something sensible here? */
 281    (void)ret;
 282
 283    if (SVGA_DEBUG & DEBUG_FLUSH) {
 284       svga_hwtnl_flush_retry( svga );
 285       svga_context_flush(svga, NULL);
 286    }
 287
 288 done:
 289    if (info->indexed && ibuffer_saved.user_buffer)
 290       pipe->set_index_buffer(pipe, &ibuffer_saved);
 291
 292    SVGA_STATS_TIME_POP(svga_sws(svga));
 293 }
 294
 295
 296 void svga_init_draw_functions( struct svga_context *svga )
 297 {
 298    svga->pipe.draw_vbo = svga_draw_vbo;
 299 }