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_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 /* Returns TRUE if we are currently using flat shading.
  48  */
  49 static boolean
  50 is_using_flat_shading(const struct svga_context *svga)
  51 {
  52    return
  53       svga->state.hw_draw.fs ? svga->state.hw_draw.fs->uses_flat_interp : FALSE;
  54 }
  55
  56
  57 static enum pipe_error
  58 retry_draw_range_elements( struct svga_context *svga,
  59                            struct pipe_resource *index_buffer,
  60                            unsigned index_size,
  61                            int index_bias,
  62                            unsigned min_index,
  63                            unsigned max_index,
  64                            enum pipe_prim_type prim,
  65                            unsigned start,
  66                            unsigned count,
  67                            unsigned start_instance,
  68                            unsigned instance_count,
  69                            boolean do_retry )
  70 {
  71    enum pipe_error ret = PIPE_OK;
  72
  73    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWELEMENTS);
  74
  75    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
  76
  77    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
  78    if (ret != PIPE_OK)
  79       goto retry;
  80
  81    /** determine if flatshade is to be used after svga_update_state()
  82     *  in case the fragment shader is changed.
  83     */
  84    svga_hwtnl_set_flatshade(svga->hwtnl,
  85                             svga->curr.rast->templ.flatshade ||
  86                             is_using_flat_shading(svga),
  87                             svga->curr.rast->templ.flatshade_first);
  88
  89    ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
  90                                          index_buffer, index_size, index_bias,
  91                                          min_index, max_index,
  92                                          prim, start, count,
  93                                          start_instance, instance_count);
  94    if (ret != PIPE_OK)
  95       goto retry;
  96
  97    goto done;
  98
  99 retry:
 100    svga_context_flush( svga, NULL );
 101
 102    if (do_retry)
 103    {
 104       ret = retry_draw_range_elements(svga,
 105                                       index_buffer, index_size, index_bias,
 106                                       min_index, max_index,
 107                                       prim, start, count,
 108                                       start_instance, instance_count, FALSE);
 109    }
 110
 111 done:
 112    SVGA_STATS_TIME_POP(svga_sws(svga));
 113    return ret;
 114 }
 115
 116
 117 static enum pipe_error
 118 retry_draw_arrays( struct svga_context *svga,
 119                    enum pipe_prim_type prim, unsigned start, unsigned count,
 120                    unsigned start_instance, unsigned instance_count,
 121                    boolean do_retry )
 122 {
 123    enum pipe_error ret;
 124
 125    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWARRAYS);
 126
 127    svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 128
 129    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 130    if (ret != PIPE_OK)
 131       goto retry;
 132
 133    /** determine if flatshade is to be used after svga_update_state()
 134     *  in case the fragment shader is changed.
 135     */
 136    svga_hwtnl_set_flatshade(svga->hwtnl,
 137                             svga->curr.rast->templ.flatshade ||
 138                             is_using_flat_shading(svga),
 139                             svga->curr.rast->templ.flatshade_first);
 140
 141    ret = svga_hwtnl_draw_arrays(svga->hwtnl, prim, start, count,
 142                                 start_instance, instance_count);
 143    if (ret != PIPE_OK)
 144       goto retry;
 145
 146    goto done;
 147
 148 retry:
 149    if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
 150    {
 151       svga_context_flush( svga, NULL );
 152
 153       ret = retry_draw_arrays(svga, prim, start, count,
 154                               start_instance, instance_count,
 155                               FALSE);
 156    }
 157
 158 done:
 159    SVGA_STATS_TIME_POP(svga_sws(svga));
 160    return ret;
 161 }
 162
 163
 164 /**
 165  * Determine if we need to implement primitive restart with a fallback
 166  * path which breaks the original primitive into sub-primitive at the
 167  * restart indexes.
 168  */
 169 static boolean
 170 need_fallback_prim_restart(const struct svga_context *svga,
 171                            const struct pipe_draw_info *info)
 172 {
 173    if (info->primitive_restart && info->index_size) {
 174       if (!svga_have_vgpu10(svga))
 175          return TRUE;
 176       else if (!svga->state.sw.need_swtnl) {
 177          if (info->index_size == 1)
 178             return TRUE; /* no device support for 1-byte indexes */
 179          else if (info->index_size == 2)
 180             return info->restart_index != 0xffff;
 181          else
 182             return info->restart_index != 0xffffffff;
 183       }
 184    }
 185
 186    return FALSE;
 187 }
 188
 189
 190 static void
 191 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 192 {
 193    struct svga_context *svga = svga_context( pipe );
 194    enum pipe_prim_type reduced_prim = u_reduced_prim( info->mode );
 195    unsigned count = info->count;
 196    enum pipe_error ret = 0;
 197    boolean needed_swtnl;
 198    struct pipe_resource *indexbuf =
 199       info->has_user_indices ? NULL : info->index.resource;
 200
 201    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWVBO);
 202
 203    svga->hud.num_draw_calls++;  /* for SVGA_QUERY_NUM_DRAW_CALLS */
 204
 205    if (u_reduced_prim(info->mode) == PIPE_PRIM_TRIANGLES &&
 206        svga->curr.rast->templ.cull_face == PIPE_FACE_FRONT_AND_BACK)
 207       goto done;
 208
 209    /* Upload a user index buffer. */
 210    unsigned index_offset = 0;
 211    if (info->index_size && info->has_user_indices &&
 212        !util_upload_index_buffer(pipe, info, &indexbuf, &index_offset)) {
 213       goto done;
 214    }
 215
 216    /*
 217     * Mark currently bound target surfaces as dirty
 218     * doesn't really matter if it is done before drawing.
 219     *
 220     * TODO If we ever normaly return something other then
 221     * true we should not mark it as dirty then.
 222     */
 223    svga_mark_surfaces_dirty(svga_context(pipe));
 224
 225    if (svga->curr.reduced_prim != reduced_prim) {
 226       svga->curr.reduced_prim = reduced_prim;
 227       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 228    }
 229
 230    if (need_fallback_prim_restart(svga, info)) {
 231       enum pipe_error r;
 232       r = util_draw_vbo_without_prim_restart(pipe, info);
 233       assert(r == PIPE_OK);
 234       (void) r;
 235       goto done;
 236    }
 237
 238    if (!u_trim_pipe_prim( info->mode, &count ))
 239       goto done;
 240
 241    needed_swtnl = svga->state.sw.need_swtnl;
 242
 243    svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
 244
 245    if (svga->state.sw.need_swtnl) {
 246       svga->hud.num_fallbacks++;  /* for SVGA_QUERY_NUM_FALLBACKS */
 247       if (!needed_swtnl) {
 248          /*
 249           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 250           * currently bound vertex buffers, some of which may already be
 251           * referenced in the current command buffer as result of previous HW
 252           * TNL. So flush now, to prevent the context to flush while a referred
 253           * vertex buffer is mapped.
 254           */
 255
 256          svga_context_flush(svga, NULL);
 257       }
 258
 259       /* Avoid leaking the previous hwtnl bias to swtnl */
 260       svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
 261       ret = svga_swtnl_draw_vbo(svga, info, indexbuf, index_offset);
 262    }
 263    else {
 264       if (info->index_size && indexbuf) {
 265          unsigned offset;
 266
 267          assert(index_offset % info->index_size == 0);
 268          offset = index_offset / info->index_size;
 269
 270          ret = retry_draw_range_elements( svga,
 271                                           indexbuf,
 272                                           info->index_size,
 273                                           info->index_bias,
 274                                           info->min_index,
 275                                           info->max_index,
 276                                           info->mode,
 277                                           info->start + offset,
 278                                           count,
 279                                           info->start_instance,
 280                                           info->instance_count,
 281                                           TRUE );
 282       }
 283       else {
 284          ret = retry_draw_arrays(svga, info->mode, info->start, count,
 285                                  info->start_instance, info->instance_count,
 286                                  TRUE);
 287       }
 288    }
 289
 290    /* XXX: Silence warnings, do something sensible here? */
 291    (void)ret;
 292
 293    if (SVGA_DEBUG & DEBUG_FLUSH) {
 294       svga_hwtnl_flush_retry( svga );
 295       svga_context_flush(svga, NULL);
 296    }
 297
 298 done:
 299    if (info->index_size && info->index.resource != indexbuf)
 300       pipe_resource_reference(&indexbuf, NULL);
 301    SVGA_STATS_TIME_POP(svga_sws(svga));
 302 }
 303
 304
 305 void svga_init_draw_functions( struct svga_context *svga )
 306 {
 307    svga->pipe.draw_vbo = svga_draw_vbo;
 308 }