src/gallium/drivers/svga/svga_swtnl_backend.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 #include "draw/draw_vbuf.h"
  27 #include "draw/draw_context.h"
  28 #include "draw/draw_vertex.h"
  29
  30 #include "util/u_debug.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_math.h"
  33 #include "util/u_memory.h"
  34
  35 #include "svga_context.h"
  36 #include "svga_state.h"
  37 #include "svga_swtnl.h"
  38
  39 #include "svga_types.h"
  40 #include "svga_reg.h"
  41 #include "svga3d_reg.h"
  42 #include "svga_draw.h"
  43 #include "svga_swtnl_private.h"
  44
  45
  46 static const struct vertex_info *
  47 svga_vbuf_render_get_vertex_info( struct vbuf_render *render )
  48 {
  49    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  50    struct svga_context *svga = svga_render->svga;
  51
  52    svga_swtnl_update_vdecl(svga);
  53
  54    return &svga_render->vertex_info;
  55 }
  56
  57
  58 static boolean
  59 svga_vbuf_render_allocate_vertices( struct vbuf_render *render,
  60                                     ushort vertex_size,
  61                                     ushort nr_vertices )
  62 {
  63    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  64    struct svga_context *svga = svga_render->svga;
  65    struct pipe_screen *screen = svga->pipe.screen;
  66    size_t size = (size_t)nr_vertices * (size_t)vertex_size;
  67    boolean new_vbuf = FALSE;
  68    boolean new_ibuf = FALSE;
  69
  70    if (svga_render->vertex_size != vertex_size)
  71       svga->swtnl.new_vdecl = TRUE;
  72    svga_render->vertex_size = (size_t)vertex_size;
  73
  74    if (svga->swtnl.new_vbuf)
  75       new_ibuf = new_vbuf = TRUE;
  76    svga->swtnl.new_vbuf = FALSE;
  77
  78    if (svga_render->vbuf_size < svga_render->vbuf_offset + svga_render->vbuf_used + size)
  79       new_vbuf = TRUE;
  80
  81    if (new_vbuf)
  82       pipe_resource_reference(&svga_render->vbuf, NULL);
  83    if (new_ibuf)
  84       pipe_resource_reference(&svga_render->ibuf, NULL);
  85
  86    if (!svga_render->vbuf) {
  87       svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
  88       svga_render->vbuf = pipe_buffer_create(screen,
  89                                              PIPE_BIND_VERTEX_BUFFER,
  90                                              PIPE_USAGE_STREAM,
  91                                              svga_render->vbuf_size);
  92       if(!svga_render->vbuf) {
  93          svga_context_flush(svga, NULL);
  94          assert(!svga_render->vbuf);
  95          svga_render->vbuf = pipe_buffer_create(screen,
  96                                                 PIPE_BIND_VERTEX_BUFFER,
  97                                                 PIPE_USAGE_STREAM,
  98                                                 svga_render->vbuf_size);
  99          /* The buffer allocation may fail if we run out of memory.
 100           * The draw module's vbuf code should handle that without crashing.
 101           */
 102       }
 103
 104       svga->swtnl.new_vdecl = TRUE;
 105       svga_render->vbuf_offset = 0;
 106    } else {
 107       svga_render->vbuf_offset += svga_render->vbuf_used;
 108    }
 109
 110    svga_render->vbuf_used = 0;
 111
 112    if (svga->swtnl.new_vdecl)
 113       svga_render->vdecl_offset = svga_render->vbuf_offset;
 114
 115    return TRUE;
 116 }
 117
 118 static void *
 119 svga_vbuf_render_map_vertices( struct vbuf_render *render )
 120 {
 121    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 122    struct svga_context *svga = svga_render->svga;
 123
 124    if (svga_render->vbuf) {
 125       char *ptr = (char*)pipe_buffer_map(&svga->pipe,
 126                                          svga_render->vbuf,
 127                                          PIPE_TRANSFER_WRITE |
 128                                          PIPE_TRANSFER_FLUSH_EXPLICIT |
 129                                          PIPE_TRANSFER_DISCARD_RANGE |
 130                                          PIPE_TRANSFER_UNSYNCHRONIZED,
 131                                          &svga_render->vbuf_transfer);
 132       if (ptr)
 133          return ptr + svga_render->vbuf_offset;
 134       else {
 135          svga_render->vbuf_transfer = NULL;
 136          return NULL;
 137       }
 138    }
 139    else {
 140       /* we probably ran out of memory when allocating the vertex buffer */
 141       return NULL;
 142    }
 143 }
 144
 145 static void
 146 svga_vbuf_render_unmap_vertices( struct vbuf_render *render,
 147                                  ushort min_index,
 148                                  ushort max_index )
 149 {
 150    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 151    struct svga_context *svga = svga_render->svga;
 152    unsigned offset, length;
 153    size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
 154
 155    offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
 156    length = svga_render->vertex_size * (max_index + 1 - min_index);
 157    pipe_buffer_flush_mapped_range(&svga->pipe,
 158                                   svga_render->vbuf_transfer,
 159                                   offset, length);
 160    pipe_buffer_unmap(&svga->pipe, svga_render->vbuf_transfer);
 161    svga_render->min_index = min_index;
 162    svga_render->max_index = max_index;
 163    svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
 164 }
 165
 166 static void
 167 svga_vbuf_render_set_primitive( struct vbuf_render *render,
 168                                 unsigned prim )
 169 {
 170    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 171    svga_render->prim = prim;
 172 }
 173
 174 static void
 175 svga_vbuf_submit_state( struct svga_vbuf_render *svga_render )
 176 {
 177    struct svga_context *svga = svga_render->svga;
 178    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 179    enum pipe_error ret;
 180    int i;
 181
 182    /* if the vdecl or vbuf hasn't changed do nothing */
 183    if (!svga->swtnl.new_vdecl)
 184       return;
 185
 186    memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
 187
 188    /* flush the hw state */
 189    ret = svga_hwtnl_flush(svga->hwtnl);
 190    if (ret != PIPE_OK) {
 191       svga_context_flush(svga, NULL);
 192       ret = svga_hwtnl_flush(svga->hwtnl);
 193       /* if we hit this path we might become synced with hw */
 194       svga->swtnl.new_vbuf = TRUE;
 195       assert(ret == 0);
 196    }
 197
 198    svga_hwtnl_reset_vdecl(svga->hwtnl, svga_render->vdecl_count);
 199
 200    for (i = 0; i < svga_render->vdecl_count; i++) {
 201       vdecl[i].array.offset += svga_render->vdecl_offset;
 202
 203       svga_hwtnl_vdecl( svga->hwtnl,
 204                         i,
 205                         &vdecl[i],
 206                         svga_render->vbuf );
 207    }
 208
 209    /* We have already taken care of flatshading, so let the hwtnl
 210     * module use whatever is most convenient:
 211     */
 212    if (svga->state.sw.need_pipeline) {
 213       svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
 214       svga_hwtnl_set_unfilled(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
 215    }
 216    else {
 217       svga_hwtnl_set_flatshade( svga->hwtnl,
 218                                 svga->curr.rast->templ.flatshade,
 219                                 svga->curr.rast->templ.flatshade_first );
 220
 221       svga_hwtnl_set_unfilled( svga->hwtnl,
 222                                svga->curr.rast->hw_unfilled );
 223    }
 224
 225    svga->swtnl.new_vdecl = FALSE;
 226 }
 227
 228 static void
 229 svga_vbuf_render_draw_arrays( struct vbuf_render *render,
 230                               unsigned start,
 231                               uint nr )
 232 {
 233    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 234    struct svga_context *svga = svga_render->svga;
 235    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 236    enum pipe_error ret = PIPE_OK;
 237
 238    /* off to hardware */
 239    svga_vbuf_submit_state(svga_render);
 240
 241    /* Need to call update_state() again as the draw module may have
 242     * altered some of our state behind our backs.  Testcase:
 243     * redbook/polys.c
 244     */
 245    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 246
 247    ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 248    if (ret != PIPE_OK) {
 249       svga_context_flush(svga, NULL);
 250       ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 251       svga->swtnl.new_vbuf = TRUE;
 252       assert(ret == PIPE_OK);
 253    }
 254 }
 255
 256
 257 static void
 258 svga_vbuf_render_draw_elements( struct vbuf_render *render,
 259                                 const ushort *indices,
 260                                 uint nr_indices)
 261 {
 262    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 263    struct svga_context *svga = svga_render->svga;
 264    struct pipe_screen *screen = svga->pipe.screen;
 265    int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 266    boolean ret;
 267    size_t size = 2 * nr_indices;
 268
 269    assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
 270
 271    if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
 272       pipe_resource_reference(&svga_render->ibuf, NULL);
 273
 274    if (!svga_render->ibuf) {
 275       svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
 276       svga_render->ibuf = pipe_buffer_create(screen,
 277                                              PIPE_BIND_INDEX_BUFFER,
 278                                              PIPE_USAGE_STREAM,
 279                                              svga_render->ibuf_size);
 280       svga_render->ibuf_offset = 0;
 281    }
 282
 283    pipe_buffer_write_nooverlap(&svga->pipe, svga_render->ibuf,
 284                                svga_render->ibuf_offset, 2 * nr_indices, indices);
 285
 286    /* off to hardware */
 287    svga_vbuf_submit_state(svga_render);
 288
 289    /* Need to call update_state() again as the draw module may have
 290     * altered some of our state behind our backs.  Testcase:
 291     * redbook/polys.c
 292     */
 293    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 294
 295    ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 296                                         svga_render->ibuf,
 297                                         2,
 298                                         bias,
 299                                         svga_render->min_index,
 300                                         svga_render->max_index,
 301                                         svga_render->prim,
 302                                         svga_render->ibuf_offset / 2, nr_indices);
 303    if(ret != PIPE_OK) {
 304       svga_context_flush(svga, NULL);
 305       ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 306                                            svga_render->ibuf,
 307                                            2,
 308                                            bias,
 309                                            svga_render->min_index,
 310                                            svga_render->max_index,
 311                                            svga_render->prim,
 312                                            svga_render->ibuf_offset / 2, nr_indices);
 313       svga->swtnl.new_vbuf = TRUE;
 314       assert(ret == PIPE_OK);
 315    }
 316
 317    svga_render->ibuf_offset += size;
 318 }
 319
 320
 321 static void
 322 svga_vbuf_render_release_vertices( struct vbuf_render *render )
 323 {
 324
 325 }
 326
 327
 328 static void
 329 svga_vbuf_render_destroy( struct vbuf_render *render )
 330 {
 331    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 332
 333    pipe_resource_reference(&svga_render->vbuf, NULL);
 334    pipe_resource_reference(&svga_render->ibuf, NULL);
 335    FREE(svga_render);
 336 }
 337
 338
 339 /**
 340  * Create a new primitive render.
 341  */
 342 struct vbuf_render *
 343 svga_vbuf_render_create( struct svga_context *svga )
 344 {
 345    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 346
 347    svga_render->svga = svga;
 348    svga_render->ibuf_size = 0;
 349    svga_render->vbuf_size = 0;
 350    svga_render->ibuf_alloc_size = 4*1024;
 351    svga_render->vbuf_alloc_size = 64*1024;
 352    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 353    svga_render->base.max_indices = 65536;
 354    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 355    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 356    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 357    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 358    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 359    svga_render->base.draw_elements = svga_vbuf_render_draw_elements;
 360    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 361    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 362    svga_render->base.destroy = svga_vbuf_render_destroy;
 363
 364    return &svga_render->base;
 365 }