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