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 /* Returns TRUE if we are currently using flat shading.
  49  */
  50 static boolean
  51 is_using_flat_shading(const struct svga_context *svga)
  52 {
  53    return
  54       svga->state.hw_draw.fs ? svga->state.hw_draw.fs->uses_flat_interp : FALSE;
  55 }
  56
  57
  58 static enum pipe_error
  59 retry_draw_range_elements( struct svga_context *svga,
  60                            struct pipe_resource *index_buffer,
  61                            unsigned index_size,
  62                            int index_bias,
  63                            unsigned min_index,
  64                            unsigned max_index,
  65                            enum pipe_prim_type prim,
  66                            unsigned start,
  67                            unsigned count,
  68                            unsigned start_instance,
  69                            unsigned instance_count,
  70                            boolean do_retry )
  71 {
  72    enum pipe_error ret = PIPE_OK;
  73
  74    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWELEMENTS);
  75
  76    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
  77
  78    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
  79    if (ret != PIPE_OK)
  80       goto retry;
  81
  82    /** determine if flatshade is to be used after svga_update_state()
  83     *  in case the fragment shader is changed.
  84     */
  85    svga_hwtnl_set_flatshade(svga->hwtnl,
  86                             svga->curr.rast->templ.flatshade ||
  87                             is_using_flat_shading(svga),
  88                             svga->curr.rast->templ.flatshade_first);
  89
  90    ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
  91                                          index_buffer, index_size, index_bias,
  92                                          min_index, max_index,
  93                                          prim, start, count,
  94                                          start_instance, instance_count);
  95    if (ret != PIPE_OK)
  96       goto retry;
  97
  98    goto done;
  99
 100 retry:
 101    svga_context_flush( svga, NULL );
 102
 103    if (do_retry)
 104    {
 105       ret = retry_draw_range_elements(svga,
 106                                       index_buffer, index_size, index_bias,
 107                                       min_index, max_index,
 108                                       prim, start, count,
 109                                       start_instance, instance_count, FALSE);
 110    }
 111
 112 done:
 113    SVGA_STATS_TIME_POP(svga_sws(svga));
 114    return ret;
 115 }
 116
 117
 118 static enum pipe_error
 119 retry_draw_arrays( struct svga_context *svga,
 120                    enum pipe_prim_type prim, unsigned start, unsigned count,
 121                    unsigned start_instance, unsigned instance_count,
 122                    boolean do_retry )
 123 {
 124    enum pipe_error ret;
 125
 126    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWARRAYS);
 127
 128    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 129
 130    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 131    if (ret != PIPE_OK)
 132       goto retry;
 133
 134    /** determine if flatshade is to be used after svga_update_state()
 135     *  in case the fragment shader is changed.
 136     */
 137    svga_hwtnl_set_flatshade(svga->hwtnl,
 138                             svga->curr.rast->templ.flatshade ||
 139                             is_using_flat_shading(svga),
 140                             svga->curr.rast->templ.flatshade_first);
 141
 142    ret = svga_hwtnl_draw_arrays(svga->hwtnl, prim, start, count,
 143                                 start_instance, instance_count);
 144    if (ret != PIPE_OK)
 145       goto retry;
 146
 147    goto done;
 148
 149 retry:
 150    if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
 151    {
 152       svga_context_flush( svga, NULL );
 153
 154       ret = retry_draw_arrays(svga, prim, start, count,
 155                               start_instance, instance_count,
 156                               FALSE);
 157    }
 158
 159 done:
 160    SVGA_STATS_TIME_POP(svga_sws(svga));
 161    return ret;
 162 }
 163
 164
 165 /**
 166  * Determine if we need to implement primitive restart with a fallback
 167  * path which breaks the original primitive into sub-primitive at the
 168  * restart indexes.
 169  */
 170 static boolean
 171 need_fallback_prim_restart(const struct svga_context *svga,
 172                            const struct pipe_draw_info *info)
 173 {
 174    if (info->primitive_restart && info->index_size) {
 175       if (!svga_have_vgpu10(svga))
 176          return TRUE;
 177       else if (!svga->state.sw.need_swtnl) {
 178          if (info->index_size == 1)
 179             return TRUE; /* no device support for 1-byte indexes */
 180          else if (info->index_size == 2)
 181             return info->restart_index != 0xffff;
 182          else
 183             return info->restart_index != 0xffffffff;
 184       }
 185    }
 186
 187    return FALSE;
 188 }
 189
 190
 191 static void
 192 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 193 {
 194    struct svga_context *svga = svga_context( pipe );
 195    enum pipe_prim_type reduced_prim = u_reduced_prim( info->mode );
 196    unsigned count = info->count;
 197    enum pipe_error ret = 0;
 198    boolean needed_swtnl;
 199    struct pipe_resource *indexbuf =
 200       info->has_user_indices ? NULL : info->index.resource;
 201
 202    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWVBO);
 203
 204    svga->hud.num_draw_calls++;  /* for SVGA_QUERY_NUM_DRAW_CALLS */
 205
 206    if (u_reduced_prim(info->mode) == PIPE_PRIM_TRIANGLES &&
 207        svga->curr.rast->templ.cull_face == PIPE_FACE_FRONT_AND_BACK)
 208       goto done;
 209
 210    /* Upload a user index buffer. */
 211    unsigned index_offset = 0;
 212    if (info->index_size && info->has_user_indices &&
 213        !util_upload_index_buffer(pipe, info, &indexbuf, &index_offset)) {
 214       goto done;
 215    }
 216
 217    /*
 218     * Mark currently bound target surfaces as dirty
 219     * doesn't really matter if it is done before drawing.
 220     *
 221     * TODO If we ever normaly return something other then
 222     * true we should not mark it as dirty then.
 223     */
 224    svga_mark_surfaces_dirty(svga_context(pipe));
 225
 226    if (svga->curr.reduced_prim != reduced_prim) {
 227       svga->curr.reduced_prim = reduced_prim;
 228       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 229    }
 230
 231    if (need_fallback_prim_restart(svga, info)) {
 232       enum pipe_error r;
 233       r = util_draw_vbo_without_prim_restart(pipe, info);
 234       assert(r == PIPE_OK);
 235       (void) r;
 236       goto done;
 237    }
 238
 239    if (!u_trim_pipe_prim( info->mode, &count ))
 240       goto done;
 241
 242    needed_swtnl = svga->state.sw.need_swtnl;
 243
 244    svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
 245
 246    if (svga->state.sw.need_swtnl) {
 247       svga->hud.num_fallbacks++;  /* for SVGA_QUERY_NUM_FALLBACKS */
 248       if (!needed_swtnl) {
 249          /*
 250           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 251           * currently bound vertex buffers, some of which may already be
 252           * referenced in the current command buffer as result of previous HW
 253           * TNL. So flush now, to prevent the context to flush while a referred
 254           * vertex buffer is mapped.
 255           */
 256
 257          svga_context_flush(svga, NULL);
 258       }
 259
 260       /* Avoid leaking the previous hwtnl bias to swtnl */
 261       svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
 262       ret = svga_swtnl_draw_vbo(svga, info, indexbuf, index_offset);
 263    }
 264    else {
 265       if (info->index_size && indexbuf) {
 266          unsigned offset;
 267
 268          assert(index_offset % info->index_size == 0);
 269          offset = index_offset / info->index_size;
 270
 271          ret = retry_draw_range_elements( svga,
 272                                           indexbuf,
 273                                           info->index_size,
 274                                           info->index_bias,
 275                                           info->min_index,
 276                                           info->max_index,
 277                                           info->mode,
 278                                           info->start + offset,
 279                                           count,
 280                                           info->start_instance,
 281                                           info->instance_count,
 282                                           TRUE );
 283       }
 284       else {
 285          ret = retry_draw_arrays(svga, info->mode, info->start, count,
 286                                  info->start_instance, info->instance_count,
 287                                  TRUE);
 288       }
 289    }
 290
 291    /* XXX: Silence warnings, do something sensible here? */
 292    (void)ret;
 293
 294    if (SVGA_DEBUG & DEBUG_FLUSH) {
 295       svga_hwtnl_flush_retry( svga );
 296       svga_context_flush(svga, NULL);
 297    }
 298
 299 done:
 300    if (info->index_size && info->index.resource != indexbuf)
 301       pipe_resource_reference(&indexbuf, NULL);
 302    SVGA_STATS_TIME_POP(svga_sws(svga));
 303 }
 304
 305
 306 void svga_init_draw_functions( struct svga_context *svga )
 307 {
 308    svga->pipe.draw_vbo = svga_draw_vbo;
 309 }