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