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_helpers.h"
  28 #include "util/u_inlines.h"
  29 #include "util/u_prim.h"
  30 #include "util/u_prim_restart.h"
  31
  32 #include "svga_context.h"
  33 #include "svga_draw.h"
  34 #include "svga_shader.h"
  35 #include "svga_surface.h"
  36 #include "svga_swtnl.h"
  37 #include "svga_debug.h"
  38 #include "svga_resource_buffer.h"
  39
  40 /* Returns TRUE if we are currently using flat shading.
  41  */
  42 static boolean
  43 is_using_flat_shading(const struct svga_context *svga)
  44 {
  45    return
  46       svga->state.hw_draw.fs ? svga->state.hw_draw.fs->uses_flat_interp : FALSE;
  47 }
  48
  49
  50 static enum pipe_error
  51 retry_draw_range_elements(struct svga_context *svga,
  52                           const struct pipe_draw_info *info,
  53                           unsigned count)
  54 {
  55    enum pipe_error ret;
  56
  57    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWELEMENTS);
  58
  59    ret = svga_hwtnl_draw_range_elements(svga->hwtnl, info, count);
  60    if (ret != PIPE_OK) {
  61       svga_context_flush(svga, NULL);
  62       ret = svga_hwtnl_draw_range_elements(svga->hwtnl, info, count);
  63    }
  64
  65    assert (ret == PIPE_OK);
  66    SVGA_STATS_TIME_POP(svga_sws(svga));
  67    return ret;
  68 }
  69
  70
  71 static enum pipe_error
  72 retry_draw_arrays(struct svga_context *svga,
  73                   enum pipe_prim_type prim, unsigned start, unsigned count,
  74                   unsigned start_instance, unsigned instance_count)
  75 {
  76    enum pipe_error ret;
  77
  78    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWARRAYS);
  79
  80    for (unsigned try = 0; try < 2; try++) {
  81       ret = svga_hwtnl_draw_arrays(svga->hwtnl, prim, start, count,
  82                                    start_instance, instance_count);
  83       if (ret == PIPE_OK)
  84          break;
  85       svga_context_flush(svga, NULL);
  86    }
  87
  88    SVGA_STATS_TIME_POP(svga_sws(svga));
  89    return ret;
  90 }
  91
  92
  93 /**
  94  * Determine if we need to implement primitive restart with a fallback
  95  * path which breaks the original primitive into sub-primitive at the
  96  * restart indexes.
  97  */
  98 static boolean
  99 need_fallback_prim_restart(const struct svga_context *svga,
 100                            const struct pipe_draw_info *info)
 101 {
 102    if (info->primitive_restart && info->index_size) {
 103       if (!svga_have_vgpu10(svga))
 104          return TRUE;
 105       else if (!svga->state.sw.need_swtnl) {
 106          if (info->index_size == 1)
 107             return TRUE; /* no device support for 1-byte indexes */
 108          else if (info->index_size == 2)
 109             return info->restart_index != 0xffff;
 110          else
 111             return info->restart_index != 0xffffffff;
 112       }
 113    }
 114
 115    return FALSE;
 116 }
 117
 118
 119 static void
 120 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 121 {
 122    struct svga_context *svga = svga_context(pipe);
 123    enum pipe_prim_type reduced_prim = u_reduced_prim(info->mode);
 124    unsigned count = info->count;
 125    enum pipe_error ret = 0;
 126    boolean needed_swtnl;
 127
 128    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWVBO);
 129
 130    svga->hud.num_draw_calls++;  /* for SVGA_QUERY_NUM_DRAW_CALLS */
 131
 132    if (u_reduced_prim(info->mode) == PIPE_PRIM_TRIANGLES &&
 133        svga->curr.rast->templ.cull_face == PIPE_FACE_FRONT_AND_BACK)
 134       goto done;
 135
 136    /*
 137     * Mark currently bound target surfaces as dirty
 138     * doesn't really matter if it is done before drawing.
 139     *
 140     * TODO If we ever normaly return something other then
 141     * true we should not mark it as dirty then.
 142     */
 143    svga_mark_surfaces_dirty(svga_context(pipe));
 144
 145    if (svga->curr.reduced_prim != reduced_prim) {
 146       svga->curr.reduced_prim = reduced_prim;
 147       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 148    }
 149
 150    if (need_fallback_prim_restart(svga, info)) {
 151       enum pipe_error r;
 152       r = util_draw_vbo_without_prim_restart(pipe, info);
 153       assert(r == PIPE_OK);
 154       (void) r;
 155       goto done;
 156    }
 157
 158    if (!u_trim_pipe_prim(info->mode, &count))
 159       goto done;
 160
 161    needed_swtnl = svga->state.sw.need_swtnl;
 162
 163    svga_update_state_retry(svga, SVGA_STATE_NEED_SWTNL);
 164
 165    if (svga->state.sw.need_swtnl) {
 166       svga->hud.num_fallbacks++;  /* for SVGA_QUERY_NUM_FALLBACKS */
 167       if (!needed_swtnl) {
 168          /*
 169           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 170           * currently bound vertex buffers, some of which may already be
 171           * referenced in the current command buffer as result of previous HW
 172           * TNL. So flush now, to prevent the context to flush while a referred
 173           * vertex buffer is mapped.
 174           */
 175
 176          svga_context_flush(svga, NULL);
 177       }
 178
 179       /* Avoid leaking the previous hwtnl bias to swtnl */
 180       svga_hwtnl_set_index_bias(svga->hwtnl, 0);
 181       ret = svga_swtnl_draw_vbo(svga, info);
 182    }
 183    else {
 184       if (!svga_update_state_retry(svga, SVGA_STATE_HW_DRAW)) {
 185          static const char *msg = "State update failed, skipping draw call";
 186          debug_printf("%s\n", msg);
 187          pipe_debug_message(&svga->debug.callback, INFO, "%s", msg);
 188          goto done;
 189       }
 190       svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 191
 192       /** determine if flatshade is to be used after svga_update_state()
 193        *  in case the fragment shader is changed.
 194        */
 195       svga_hwtnl_set_flatshade(svga->hwtnl,
 196                                svga->curr.rast->templ.flatshade ||
 197                                is_using_flat_shading(svga),
 198                                svga->curr.rast->templ.flatshade_first);
 199
 200       if (info->index_size) {
 201          ret = retry_draw_range_elements(svga, info, count);
 202       }
 203       else {
 204          ret = retry_draw_arrays(svga, info->mode, info->start, count,
 205                                  info->start_instance, info->instance_count);
 206       }
 207    }
 208
 209    /* XXX: Silence warnings, do something sensible here? */
 210    (void)ret;
 211
 212    if (SVGA_DEBUG & DEBUG_FLUSH) {
 213       svga_hwtnl_flush_retry(svga);
 214       svga_context_flush(svga, NULL);
 215    }
 216
 217 done:
 218    SVGA_STATS_TIME_POP(svga_sws(svga));
 219 }
 220
 221
 222 void
 223 svga_init_draw_functions(struct svga_context *svga)
 224 {
 225    svga->pipe.draw_vbo = svga_draw_vbo;
 226 }