src/gallium/state_trackers/dri/dri_drawable.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27 /*
  28  * Author: Keith Whitwell <keithw@vmware.com>
  29  * Author: Jakob Bornecrantz <wallbraker@gmail.com>
  30  */
  31
  32 #include "dri_screen.h"
  33 #include "dri_context.h"
  34 #include "dri_drawable.h"
  35
  36 #include "pipe/p_context.h"
  37 #include "pipe/p_screen.h"
  38 #include "pipe/p_inlines.h"
  39 #include "state_tracker/drm_api.h"
  40 #include "state_tracker/dri1_api.h"
  41 #include "state_tracker/st_public.h"
  42 #include "state_tracker/st_context.h"
  43 #include "state_tracker/st_cb_fbo.h"
  44
  45 #include "util/u_memory.h"
  46
  47
  48 static void
  49 dri_copy_to_front(__DRIdrawablePrivate *dPriv,
  50                   struct pipe_surface *from,
  51                   int x, int y, unsigned w, unsigned h)
  52 {
  53    /* TODO send a message to the Xserver to copy to the real front buffer */
  54 }
  55
  56
  57 static struct pipe_surface *
  58 dri_surface_from_handle(struct pipe_screen *screen,
  59                         unsigned handle,
  60                         enum pipe_format format,
  61                         unsigned width,
  62                         unsigned height,
  63                         unsigned pitch)
  64 {
  65    struct pipe_surface *surface = NULL;
  66    struct pipe_texture *texture = NULL;
  67    struct pipe_texture templat;
  68    struct pipe_buffer *buf = NULL;
  69
  70    buf = drm_api_hooks.buffer_from_handle(screen, "dri2 buffer", handle);
  71    if (!buf)
  72       return NULL;
  73
  74    memset(&templat, 0, sizeof(templat));
  75    templat.tex_usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
  76    templat.target = PIPE_TEXTURE_2D;
  77    templat.last_level = 0;
  78    templat.depth[0] = 1;
  79    templat.format = format;
  80    templat.width[0] = width;
  81    templat.height[0] = height;
  82    pf_get_block(templat.format, &templat.block);
  83
  84    texture = screen->texture_blanket(screen,
  85                                      &templat,
  86                                      &pitch,
  87                                      buf);
  88
  89    /* we don't need the buffer from this point on */
  90    pipe_buffer_reference(&buf, NULL);
  91
  92    if (!texture)
  93       return NULL;
  94
  95    surface = screen->get_tex_surface(screen, texture, 0, 0, 0,
  96                                      PIPE_BUFFER_USAGE_GPU_READ |
  97                                      PIPE_BUFFER_USAGE_GPU_WRITE);
  98
  99    /* we don't need the texture from this point on */
 100    pipe_texture_reference(&texture, NULL);
 101    return surface;
 102 }
 103
 104
 105 /**
 106  * This will be called a drawable is known to have been resized.
 107  */
 108 void
 109 dri_get_buffers(__DRIdrawablePrivate *dPriv)
 110 {
 111    struct dri_drawable *drawable = dri_drawable(dPriv);
 112    struct pipe_surface *surface = NULL;
 113    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 114    __DRIbuffer *buffers = NULL;
 115    __DRIscreen *dri_screen = drawable->sPriv;
 116    __DRIdrawable *dri_drawable = drawable->dPriv;
 117    boolean have_depth = FALSE;
 118    int i, count;
 119
 120    buffers = (*dri_screen->dri2.loader->getBuffers)(dri_drawable,
 121                                                     &dri_drawable->w,
 122                                                     &dri_drawable->h,
 123                                                     drawable->attachments,
 124                                                     drawable->num_attachments,
 125                                                     &count,
 126                                                     dri_drawable->loaderPrivate);
 127
 128    if (buffers == NULL) {
 129       return;
 130    }
 131
 132    /* set one cliprect to cover the whole dri_drawable */
 133    dri_drawable->x = 0;
 134    dri_drawable->y = 0;
 135    dri_drawable->backX = 0;
 136    dri_drawable->backY = 0;
 137    dri_drawable->numClipRects = 1;
 138    dri_drawable->pClipRects[0].x1 = 0;
 139    dri_drawable->pClipRects[0].y1 = 0;
 140    dri_drawable->pClipRects[0].x2 = dri_drawable->w;
 141    dri_drawable->pClipRects[0].y2 = dri_drawable->h;
 142    dri_drawable->numBackClipRects = 1;
 143    dri_drawable->pBackClipRects[0].x1 = 0;
 144    dri_drawable->pBackClipRects[0].y1 = 0;
 145    dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
 146    dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 147
 148    for (i = 0; i < count; i++) {
 149       enum pipe_format format = 0;
 150       int index = 0;
 151
 152       switch (buffers[i].attachment) {
 153          case __DRI_BUFFER_FRONT_LEFT:
 154             index = ST_SURFACE_FRONT_LEFT;
 155             format = PIPE_FORMAT_A8R8G8B8_UNORM;
 156             break;
 157          case __DRI_BUFFER_FAKE_FRONT_LEFT:
 158             index = ST_SURFACE_FRONT_LEFT;
 159             format = PIPE_FORMAT_A8R8G8B8_UNORM;
 160             break;
 161          case __DRI_BUFFER_BACK_LEFT:
 162             index = ST_SURFACE_BACK_LEFT;
 163             format = PIPE_FORMAT_A8R8G8B8_UNORM;
 164             break;
 165          case __DRI_BUFFER_DEPTH:
 166             index = ST_SURFACE_DEPTH;
 167             format = PIPE_FORMAT_Z24S8_UNORM;
 168             break;
 169          case __DRI_BUFFER_STENCIL:
 170             index = ST_SURFACE_DEPTH;
 171             format = PIPE_FORMAT_Z24S8_UNORM;
 172             break;
 173          case __DRI_BUFFER_ACCUM:
 174          default:
 175             assert(0);
 176       }
 177       assert(buffers[i].cpp == 4);
 178
 179       if (index == ST_SURFACE_DEPTH) {
 180          if (have_depth)
 181             continue;
 182          else
 183             have_depth = TRUE;
 184       }
 185
 186       surface = dri_surface_from_handle(screen,
 187                                         buffers[i].name,
 188                                         format,
 189                                         dri_drawable->w,
 190                                         dri_drawable->h,
 191                                         buffers[i].pitch);
 192
 193       st_set_framebuffer_surface(drawable->stfb, index, surface);
 194       pipe_surface_reference(&surface, NULL);
 195    }
 196    /* this needed, or else the state tracker fails to pick the new buffers */
 197    st_resize_framebuffer(drawable->stfb, dri_drawable->w, dri_drawable->h);
 198 }
 199
 200
 201 void
 202 dri_flush_frontbuffer(struct pipe_screen *screen,
 203                       struct pipe_surface *surf,
 204                       void *context_private)
 205 {
 206    struct dri_context *ctx = (struct dri_context *)context_private;
 207    dri_copy_to_front(ctx->dPriv, surf, 0, 0, surf->width, surf->height);
 208 }
 209
 210
 211 /**
 212  * This is called when we need to set up GL rendering to a new X window.
 213  */
 214 boolean
 215 dri_create_buffer(__DRIscreenPrivate *sPriv,
 216                   __DRIdrawablePrivate *dPriv,
 217                   const __GLcontextModes *visual,
 218                   boolean isPixmap)
 219 {
 220    enum pipe_format colorFormat, depthFormat, stencilFormat;
 221    struct dri_screen *screen = sPriv->private;
 222    struct dri_drawable *drawable = NULL;
 223    struct pipe_screen *pscreen = screen->pipe_screen;
 224    int i;
 225
 226    if (isPixmap)
 227       goto fail; /* not implemented */
 228
 229    drawable = CALLOC_STRUCT(dri_drawable);
 230    if (drawable == NULL)
 231       goto fail;
 232
 233    /* XXX: todo: use the pipe_screen queries to figure out which
 234     * render targets are supportable.
 235     */
 236    assert(visual->redBits == 8);
 237    assert(visual->depthBits == 24 || visual->depthBits == 0);
 238    assert(visual->stencilBits == 8 || visual->stencilBits == 0);
 239
 240    colorFormat = PIPE_FORMAT_A8R8G8B8_UNORM;
 241
 242    if (visual->depthBits) {
 243       if (pscreen->is_format_supported(pscreen, PIPE_FORMAT_Z24S8_UNORM,
 244                                        PIPE_TEXTURE_2D,
 245                                        PIPE_TEXTURE_USAGE_RENDER_TARGET |
 246                                        PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0))
 247          depthFormat = PIPE_FORMAT_Z24S8_UNORM;
 248       else
 249          depthFormat = PIPE_FORMAT_S8Z24_UNORM;
 250    } else
 251       depthFormat = PIPE_FORMAT_NONE;
 252
 253    if (visual->stencilBits) {
 254       if (pscreen->is_format_supported(pscreen, PIPE_FORMAT_Z24S8_UNORM,
 255                                        PIPE_TEXTURE_2D,
 256                                        PIPE_TEXTURE_USAGE_RENDER_TARGET |
 257                                        PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0))
 258          stencilFormat = PIPE_FORMAT_Z24S8_UNORM;
 259       else
 260          stencilFormat = PIPE_FORMAT_S8Z24_UNORM;
 261    } else
 262       stencilFormat = PIPE_FORMAT_NONE;
 263
 264    drawable->stfb = st_create_framebuffer(visual,
 265                                           colorFormat,
 266                                           depthFormat,
 267                                           stencilFormat,
 268                                           dPriv->w,
 269                                           dPriv->h,
 270                                           (void*) drawable);
 271    if (drawable->stfb == NULL)
 272       goto fail;
 273
 274    drawable->sPriv = sPriv;
 275    drawable->dPriv = dPriv;
 276    dPriv->driverPrivate = (void *) drawable;
 277
 278    /* setup dri2 buffers information */
 279    i = 0;
 280    drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 281 #if 0
 282    /* TODO incase of double buffer visual, delay fake creation */
 283    drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
 284 #endif
 285    if (visual->doubleBufferMode)
 286       drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 287    if (visual->depthBits)
 288       drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
 289    if (visual->stencilBits)
 290       drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
 291    drawable->num_attachments = i;
 292
 293    drawable->desired_fences = 2;
 294
 295    return GL_TRUE;
 296 fail:
 297    FREE(drawable);
 298    return GL_FALSE;
 299 }
 300
 301 static struct pipe_fence_handle *
 302 dri_swap_fences_pop_front(struct dri_drawable *draw)
 303 {
 304    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 305    struct pipe_fence_handle *fence = NULL;
 306
 307    if (draw->cur_fences >= draw->desired_fences) {
 308       screen->fence_reference(screen, &fence, draw->swap_fences[draw->tail]);
 309       screen->fence_reference(screen, &draw->swap_fences[draw->tail++], NULL);
 310       --draw->cur_fences;
 311       draw->tail &= DRI_SWAP_FENCES_MASK;
 312    }
 313    return fence;
 314 }
 315
 316 static void
 317 dri_swap_fences_push_back(struct dri_drawable *draw,
 318                           struct pipe_fence_handle *fence)
 319 {
 320    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 321
 322    if (!fence)
 323       return;
 324
 325    if (draw->cur_fences < DRI_SWAP_FENCES_MAX) {
 326       draw->cur_fences++;
 327       screen->fence_reference(screen, &draw->swap_fences[draw->head++], fence);
 328       draw->head &= DRI_SWAP_FENCES_MASK;
 329    }
 330 }
 331
 332 void
 333 dri_destroy_buffer(__DRIdrawablePrivate *dPriv)
 334 {
 335    struct dri_drawable *drawable = dri_drawable(dPriv);
 336    struct pipe_fence_handle *fence;
 337    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 338
 339    st_unreference_framebuffer(drawable->stfb);
 340    drawable->desired_fences = 0;
 341    while(drawable->cur_fences) {
 342       fence = dri_swap_fences_pop_front(drawable);
 343       screen->fence_reference(screen, &fence, NULL);
 344    }
 345
 346    FREE(drawable);
 347 }
 348
 349 static void
 350 dri1_update_drawables_locked(struct dri_context *ctx,
 351                              __DRIdrawablePrivate *driDrawPriv,
 352                              __DRIdrawablePrivate *driReadPriv)
 353 {
 354    if (ctx->stLostLock) {
 355       ctx->stLostLock = FALSE;
 356       if (driDrawPriv == driReadPriv)
 357          DRI_VALIDATE_DRAWABLE_INFO(ctx->sPriv, driDrawPriv);
 358       else
 359          DRI_VALIDATE_TWO_DRAWABLES_INFO(ctx->sPriv, driDrawPriv, driReadPriv);
 360    }
 361 }
 362
 363 /**
 364  * This ensures all contexts which binds to a drawable picks up the
 365  * drawable change and signals new buffer state.
 366  * Calling st_resize_framebuffer for each context may seem like overkill,
 367  * but no new buffers will actually be allocated if the dimensions doesn't
 368  * change.
 369  */
 370
 371 static void
 372 dri1_propagate_drawable_change(struct dri_context *ctx)
 373 {
 374    __DRIdrawablePrivate *dPriv = ctx->dPriv;
 375    __DRIdrawablePrivate *rPriv = ctx->rPriv;
 376    boolean flushed = FALSE;
 377
 378    if (dPriv && ctx->d_stamp != dPriv->lastStamp) {
 379
 380       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 381       flushed = TRUE;
 382       ctx->d_stamp = dPriv->lastStamp;
 383       st_resize_framebuffer(dri_drawable(dPriv)->stfb, dPriv->w, dPriv->h);
 384
 385    }
 386
 387    if (rPriv && dPriv != rPriv && ctx->r_stamp != rPriv->lastStamp) {
 388
 389       if (!flushed)
 390                st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 391       ctx->r_stamp = rPriv->lastStamp;
 392       st_resize_framebuffer(dri_drawable(rPriv)->stfb, rPriv->w, rPriv->h);
 393
 394    } else if (rPriv && dPriv == rPriv) {
 395
 396       ctx->r_stamp = ctx->d_stamp;
 397
 398    }
 399 }
 400
 401 void
 402 dri1_update_drawables(struct dri_context *ctx,
 403                       struct dri_drawable *draw,
 404                       struct dri_drawable *read)
 405 {
 406    dri_lock(ctx);
 407    dri1_update_drawables_locked(ctx, draw->dPriv, read->dPriv);
 408    dri_unlock(ctx);
 409
 410    dri1_propagate_drawable_change(ctx);
 411 }
 412
 413 static INLINE boolean
 414 dri1_intersect_src_bbox(struct drm_clip_rect *dst,
 415                         int dst_x,
 416                         int dst_y,
 417                         const struct drm_clip_rect *src,
 418                         const struct drm_clip_rect *bbox)
 419 {
 420    int xy1;
 421    int xy2;
 422
 423    xy1 = ((int) src->x1 > (int) bbox->x1 + dst_x) ? src->x1 :
 424       (int) bbox->x1 + dst_x;
 425    xy2 = ((int) src->x2 < (int) bbox->x2 + dst_x) ? src->x2 :
 426       (int) bbox->x2 + dst_x;
 427    if (xy1 >= xy2 || xy1 < 0)
 428       return FALSE;
 429
 430    dst->x1 = xy1;
 431    dst->x2 = xy2;
 432
 433    xy1 = ((int) src->y1 > (int) bbox->y1 + dst_x) ? src->y1 :
 434       (int) bbox->y1 + dst_x;
 435    xy2 = ((int) src->y2 < (int) bbox->y2 + dst_x) ? src->y2 :
 436       (int) bbox->y2 + dst_x;
 437    if (xy1 >= xy2 || xy1 < 0)
 438       return FALSE;
 439
 440    dst->y1 = xy1;
 441    dst->y2 = xy2;
 442    return TRUE;
 443 }
 444
 445
 446 static void
 447 dri1_swap_copy(struct dri_context *ctx,
 448                struct pipe_surface *dst,
 449                struct pipe_surface *src,
 450                __DRIdrawablePrivate *dPriv,
 451                const struct drm_clip_rect *bbox)
 452 {
 453    struct pipe_context *pipe = ctx->pipe;
 454    struct drm_clip_rect clip;
 455    struct drm_clip_rect *cur;
 456    int i;
 457
 458    cur = dPriv->pClipRects;
 459
 460    for (i=0; i<dPriv->numClipRects; ++i) {
 461       if (dri1_intersect_src_bbox(&clip, dPriv->x, dPriv->y, cur++, bbox))
 462          pipe->surface_copy(pipe, dst, clip.x1, clip.y1,
 463                             src,
 464                             (int) clip.x1 - dPriv->x,
 465                             (int) clip.y1 - dPriv->y,
 466                             clip.x2 - clip.x1,
 467                             clip.y2 - clip.y1);
 468    }
 469 }
 470
 471 static void
 472 dri1_copy_to_front(struct dri_context *ctx,
 473                    struct pipe_surface *surf,
 474                    __DRIdrawablePrivate *dPriv,
 475                    const struct drm_clip_rect *sub_box,
 476                    struct pipe_fence_handle **fence)
 477 {
 478    struct pipe_context *pipe = ctx->pipe;
 479    boolean save_lost_lock;
 480    uint cur_w;
 481    uint cur_h;
 482    struct drm_clip_rect bbox;
 483    boolean visible = TRUE;
 484
 485    *fence = NULL;
 486
 487    dri_lock(ctx);
 488    save_lost_lock = ctx->stLostLock;
 489    dri1_update_drawables_locked(ctx, dPriv, dPriv);
 490    st_get_framebuffer_dimensions(dri_drawable(dPriv)->stfb, &cur_w, &cur_h);
 491
 492    bbox.x1 = 0;
 493    bbox.x2 = cur_w;
 494    bbox.y1 = 0;
 495    bbox.y2 = cur_h;
 496
 497    if (sub_box)
 498       visible = dri1_intersect_src_bbox(&bbox, 0, 0, &bbox, sub_box);
 499
 500    if (visible && __dri1_api_hooks->present_locked) {
 501
 502       __dri1_api_hooks->present_locked(pipe,
 503                                        surf,
 504                                        dPriv->pClipRects,
 505                                        dPriv->numClipRects,
 506                                        dPriv->x,
 507                                        dPriv->y,
 508                                        &bbox,
 509                                        fence);
 510
 511    } else if (visible && __dri1_api_hooks->front_srf_locked) {
 512
 513       struct pipe_surface *front =
 514          __dri1_api_hooks->front_srf_locked(pipe);
 515
 516       if (front)
 517          dri1_swap_copy(ctx, front, surf, dPriv, &bbox);
 518
 519       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, fence);
 520    }
 521
 522    ctx->stLostLock = save_lost_lock;
 523
 524    /**
 525     * FIXME: Revisit this: Update drawables on copy_sub_buffer ?
 526     */
 527
 528    if (!sub_box)
 529       dri1_update_drawables_locked(ctx, ctx->dPriv, ctx->rPriv);
 530
 531    dri_unlock(ctx);
 532    dri1_propagate_drawable_change(ctx);
 533 }
 534
 535 void
 536 dri1_flush_frontbuffer(struct pipe_screen *screen,
 537                        struct pipe_surface *surf,
 538                        void *context_private)
 539 {
 540    struct dri_context *ctx = (struct dri_context *)context_private;
 541    struct pipe_fence_handle *dummy_fence;
 542
 543    dri1_copy_to_front(ctx, surf, ctx->dPriv, NULL, &dummy_fence);
 544
 545    /**
 546     * FIXME: Do we need swap throttling here?
 547     */
 548 }
 549
 550 void
 551 dri_swap_buffers(__DRIdrawablePrivate * dPriv)
 552 {
 553    struct dri_context *ctx;
 554    struct pipe_surface *back_surf;
 555    struct dri_drawable *draw = dri_drawable(dPriv);
 556    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 557    struct pipe_fence_handle *fence;
 558    GET_CURRENT_CONTEXT(glCtx);
 559
 560    assert(__dri1_api_hooks != NULL);
 561
 562    if (!glCtx)
 563       return; /* For now */
 564
 565    ctx = (struct dri_context *) glCtx->st->pipe->priv;
 566
 567    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 568    if (back_surf) {
 569       st_notify_swapbuffers(draw->stfb);
 570       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 571       fence = dri_swap_fences_pop_front(draw);
 572       if (fence) {
 573          (void) screen->fence_finish(screen, fence, 0);
 574          screen->fence_reference(screen, &fence, NULL);
 575       }
 576       dri1_copy_to_front(ctx, back_surf, dPriv, NULL, &fence);
 577       dri_swap_fences_push_back(draw, fence);
 578       screen->fence_reference(screen, &fence, NULL);
 579    }
 580 }
 581
 582 void
 583 dri_copy_sub_buffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 584 {
 585    struct drm_clip_rect sub_bbox;
 586    struct dri_context *ctx;
 587    struct pipe_surface *back_surf;
 588    struct dri_drawable *draw = dri_drawable(dPriv);
 589    struct pipe_fence_handle *dummy_fence;
 590    GET_CURRENT_CONTEXT(glCtx);
 591
 592    assert(__dri1_api_hooks != NULL);
 593
 594    if (!glCtx)
 595       return;
 596
 597    ctx = (struct dri_context *) glCtx->st->pipe->priv;
 598
 599    sub_bbox.x1 = x;
 600    sub_bbox.x2 = x + w;
 601    sub_bbox.y1 = y;
 602    sub_bbox.y2 = y + h;
 603
 604    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 605    if (back_surf) {
 606       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 607       dri1_copy_to_front(ctx, back_surf, dPriv, &sub_bbox, &dummy_fence);
 608    }
 609 }
 610
 611 /* vim: set sw=3 ts=8 sts=3 expandtab: */