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 static void
  48 dri_copy_to_front(__DRIdrawablePrivate * dPriv,
  49                   struct pipe_surface *from,
  50                   int x, int y, unsigned w, unsigned h)
  51 {
  52    /* TODO send a message to the Xserver to copy to the real front buffer */
  53 }
  54
  55 static struct pipe_surface *
  56 dri_surface_from_handle(struct pipe_screen *screen,
  57                         unsigned handle,
  58                         enum pipe_format format,
  59                         unsigned width, unsigned height, unsigned pitch)
  60 {
  61    struct pipe_surface *surface = NULL;
  62    struct pipe_texture *texture = NULL;
  63    struct pipe_texture templat;
  64    struct pipe_buffer *buf = NULL;
  65
  66    buf = drm_api_hooks.buffer_from_handle(screen, "dri2 buffer", handle);
  67    if (!buf)
  68       return NULL;
  69
  70    memset(&templat, 0, sizeof(templat));
  71    templat.tex_usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
  72    templat.target = PIPE_TEXTURE_2D;
  73    templat.last_level = 0;
  74    templat.depth[0] = 1;
  75    templat.format = format;
  76    templat.width[0] = width;
  77    templat.height[0] = height;
  78    pf_get_block(templat.format, &templat.block);
  79
  80    texture = screen->texture_blanket(screen, &templat, &pitch, buf);
  81
  82    /* we don't need the buffer from this point on */
  83    pipe_buffer_reference(&buf, NULL);
  84
  85    if (!texture)
  86       return NULL;
  87
  88    surface = screen->get_tex_surface(screen, texture, 0, 0, 0,
  89                                      PIPE_BUFFER_USAGE_GPU_READ |
  90                                      PIPE_BUFFER_USAGE_GPU_WRITE);
  91
  92    /* we don't need the texture from this point on */
  93    pipe_texture_reference(&texture, NULL);
  94    return surface;
  95 }
  96
  97 /**
  98  * This will be called a drawable is known to have been resized.
  99  */
 100 void
 101 dri_get_buffers(__DRIdrawablePrivate * dPriv)
 102 {
 103    struct dri_drawable *drawable = dri_drawable(dPriv);
 104    struct pipe_surface *surface = NULL;
 105    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 106    __DRIbuffer *buffers = NULL;
 107    __DRIscreen *dri_screen = drawable->sPriv;
 108    __DRIdrawable *dri_drawable = drawable->dPriv;
 109    boolean have_depth = FALSE;
 110    int i, count;
 111
 112    buffers = (*dri_screen->dri2.loader->getBuffers) (dri_drawable,
 113                                                      &dri_drawable->w,
 114                                                      &dri_drawable->h,
 115                                                      drawable->attachments,
 116                                                      drawable->
 117                                                      num_attachments, &count,
 118                                                      dri_drawable->
 119                                                      loaderPrivate);
 120
 121    if (buffers == NULL) {
 122       return;
 123    }
 124
 125    /* set one cliprect to cover the whole dri_drawable */
 126    dri_drawable->x = 0;
 127    dri_drawable->y = 0;
 128    dri_drawable->backX = 0;
 129    dri_drawable->backY = 0;
 130    dri_drawable->numClipRects = 1;
 131    dri_drawable->pClipRects[0].x1 = 0;
 132    dri_drawable->pClipRects[0].y1 = 0;
 133    dri_drawable->pClipRects[0].x2 = dri_drawable->w;
 134    dri_drawable->pClipRects[0].y2 = dri_drawable->h;
 135    dri_drawable->numBackClipRects = 1;
 136    dri_drawable->pBackClipRects[0].x1 = 0;
 137    dri_drawable->pBackClipRects[0].y1 = 0;
 138    dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
 139    dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 140
 141    if (drawable->old_num == count &&
 142        drawable->old_w == dri_drawable->w &&
 143        drawable->old_h == dri_drawable->h &&
 144        memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0) {
 145        return;
 146    } else {
 147       drawable->old_num = count;
 148       drawable->old_w = dri_drawable->w;
 149       drawable->old_h = dri_drawable->h;
 150       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
 151    }
 152
 153    for (i = 0; i < count; i++) {
 154       enum pipe_format format = 0;
 155       int index = 0;
 156
 157       switch (buffers[i].attachment) {
 158       case __DRI_BUFFER_FRONT_LEFT:
 159          index = ST_SURFACE_FRONT_LEFT;
 160          format = drawable->color_format;
 161          break;
 162       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 163          index = ST_SURFACE_FRONT_LEFT;
 164          format = drawable->color_format;
 165          break;
 166       case __DRI_BUFFER_BACK_LEFT:
 167          index = ST_SURFACE_BACK_LEFT;
 168          format = drawable->color_format;
 169          break;
 170       case __DRI_BUFFER_DEPTH:
 171          index = ST_SURFACE_DEPTH;
 172          format = drawable->depth_format;
 173          break;
 174       case __DRI_BUFFER_STENCIL:
 175          index = ST_SURFACE_DEPTH;
 176          format = drawable->stencil_format;
 177          break;
 178       case __DRI_BUFFER_ACCUM:
 179       default:
 180          assert(0);
 181       }
 182
 183       if (index == ST_SURFACE_DEPTH) {
 184          if (have_depth)
 185             continue;
 186          else
 187             have_depth = TRUE;
 188       }
 189
 190       surface = dri_surface_from_handle(screen,
 191                                         buffers[i].name,
 192                                         format,
 193                                         dri_drawable->w,
 194                                         dri_drawable->h, buffers[i].pitch);
 195
 196       st_set_framebuffer_surface(drawable->stfb, index, surface);
 197       pipe_surface_reference(&surface, NULL);
 198    }
 199    /* this needed, or else the state tracker fails to pick the new buffers */
 200    st_resize_framebuffer(drawable->stfb, dri_drawable->w, dri_drawable->h);
 201 }
 202
 203 void
 204 dri_flush_frontbuffer(struct pipe_screen *screen,
 205                       struct pipe_surface *surf, void *context_private)
 206 {
 207    struct dri_context *ctx = (struct dri_context *)context_private;
 208
 209    dri_copy_to_front(ctx->dPriv, surf, 0, 0, surf->width, surf->height);
 210 }
 211
 212 /**
 213  * This is called when we need to set up GL rendering to a new X window.
 214  */
 215 boolean
 216 dri_create_buffer(__DRIscreenPrivate * sPriv,
 217                   __DRIdrawablePrivate * dPriv,
 218                   const __GLcontextModes * visual, boolean isPixmap)
 219 {
 220    struct dri_screen *screen = sPriv->private;
 221    struct dri_drawable *drawable = NULL;
 222    int i;
 223
 224    if (isPixmap)
 225       goto fail;                       /* not implemented */
 226
 227    drawable = CALLOC_STRUCT(dri_drawable);
 228    if (drawable == NULL)
 229       goto fail;
 230
 231    drawable->color_format = (visual->redBits == 8) ?
 232       PIPE_FORMAT_A8R8G8B8_UNORM : PIPE_FORMAT_R5G6B5_UNORM;
 233
 234    debug_printf("Red bits is %d\n", visual->redBits);
 235
 236    switch(visual->depthBits) {
 237    default:
 238    case 0:
 239       debug_printf("Depth buffer 0.\n");
 240       drawable->depth_format = PIPE_FORMAT_NONE;
 241       break;
 242    case 16:
 243       debug_printf("Depth buffer 16.\n");
 244       drawable->depth_format = PIPE_FORMAT_Z16_UNORM;
 245       break;
 246    case 24:
 247       if (visual->stencilBits == 0) {
 248          debug_printf("Depth buffer 24. Stencil 0.\n");
 249          drawable->depth_format = (screen->d_depth_bits_last) ?
 250             PIPE_FORMAT_X8Z24_UNORM:
 251             PIPE_FORMAT_Z24X8_UNORM;
 252       } else {
 253          debug_printf("Combined depth stencil 24 / 8.\n");
 254          drawable->depth_format = (screen->sd_depth_bits_last) ?
 255             PIPE_FORMAT_S8Z24_UNORM:
 256             PIPE_FORMAT_Z24S8_UNORM;
 257       }
 258       break;
 259    }
 260
 261    switch(visual->stencilBits) {
 262    default:
 263    case 0:
 264       drawable->stencil_format = PIPE_FORMAT_NONE;
 265       break;
 266    case 8:
 267       drawable->stencil_format = (screen->sd_depth_bits_last) ?
 268          PIPE_FORMAT_S8Z24_UNORM:
 269          PIPE_FORMAT_Z24S8_UNORM;
 270       break;
 271    }
 272
 273    drawable->stfb = st_create_framebuffer(visual,
 274                                           drawable->color_format,
 275                                           drawable->depth_format,
 276                                           drawable->stencil_format,
 277                                           dPriv->w,
 278                                           dPriv->h, (void *)drawable);
 279    if (drawable->stfb == NULL)
 280       goto fail;
 281
 282    drawable->sPriv = sPriv;
 283    drawable->dPriv = dPriv;
 284    dPriv->driverPrivate = (void *)drawable;
 285
 286    /* setup dri2 buffers information */
 287    i = 0;
 288    drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 289 #if 0
 290    /* TODO incase of double buffer visual, delay fake creation */
 291    drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
 292 #endif
 293    if (visual->doubleBufferMode)
 294       drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 295    if (visual->depthBits)
 296       drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
 297    if (visual->stencilBits)
 298       drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
 299    drawable->num_attachments = i;
 300
 301    drawable->desired_fences = 2;
 302
 303    return GL_TRUE;
 304  fail:
 305    FREE(drawable);
 306    return GL_FALSE;
 307 }
 308
 309 static struct pipe_fence_handle *
 310 dri_swap_fences_pop_front(struct dri_drawable *draw)
 311 {
 312    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 313    struct pipe_fence_handle *fence = NULL;
 314
 315    if (draw->cur_fences >= draw->desired_fences) {
 316       screen->fence_reference(screen, &fence, draw->swap_fences[draw->tail]);
 317       screen->fence_reference(screen, &draw->swap_fences[draw->tail++], NULL);
 318       --draw->cur_fences;
 319       draw->tail &= DRI_SWAP_FENCES_MASK;
 320    }
 321    return fence;
 322 }
 323
 324 static void
 325 dri_swap_fences_push_back(struct dri_drawable *draw,
 326                           struct pipe_fence_handle *fence)
 327 {
 328    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 329
 330    if (!fence)
 331       return;
 332
 333    if (draw->cur_fences < DRI_SWAP_FENCES_MAX) {
 334       draw->cur_fences++;
 335       screen->fence_reference(screen, &draw->swap_fences[draw->head++],
 336                               fence);
 337       draw->head &= DRI_SWAP_FENCES_MASK;
 338    }
 339 }
 340
 341 void
 342 dri_destroy_buffer(__DRIdrawablePrivate * dPriv)
 343 {
 344    struct dri_drawable *drawable = dri_drawable(dPriv);
 345    struct pipe_fence_handle *fence;
 346    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 347
 348    st_unreference_framebuffer(drawable->stfb);
 349    drawable->desired_fences = 0;
 350    while (drawable->cur_fences) {
 351       fence = dri_swap_fences_pop_front(drawable);
 352       screen->fence_reference(screen, &fence, NULL);
 353    }
 354
 355    FREE(drawable);
 356 }
 357
 358 static void
 359 dri1_update_drawables_locked(struct dri_context *ctx,
 360                              __DRIdrawablePrivate * driDrawPriv,
 361                              __DRIdrawablePrivate * driReadPriv)
 362 {
 363    if (ctx->stLostLock) {
 364       ctx->stLostLock = FALSE;
 365       if (driDrawPriv == driReadPriv)
 366          DRI_VALIDATE_DRAWABLE_INFO(ctx->sPriv, driDrawPriv);
 367       else
 368          DRI_VALIDATE_TWO_DRAWABLES_INFO(ctx->sPriv, driDrawPriv,
 369                                          driReadPriv);
 370    }
 371 }
 372
 373 /**
 374  * This ensures all contexts which bind to a drawable pick up the
 375  * drawable change and signal new buffer state.
 376  * Calling st_resize_framebuffer for each context may seem like overkill,
 377  * but no new buffers will actually be allocated if the dimensions don't
 378  * change.
 379  */
 380
 381 static void
 382 dri1_propagate_drawable_change(struct dri_context *ctx)
 383 {
 384    __DRIdrawablePrivate *dPriv = ctx->dPriv;
 385    __DRIdrawablePrivate *rPriv = ctx->rPriv;
 386    boolean flushed = FALSE;
 387
 388    if (dPriv && ctx->d_stamp != dPriv->lastStamp) {
 389
 390       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 391       flushed = TRUE;
 392       ctx->d_stamp = dPriv->lastStamp;
 393       st_resize_framebuffer(dri_drawable(dPriv)->stfb, dPriv->w, dPriv->h);
 394
 395    }
 396
 397    if (rPriv && dPriv != rPriv && ctx->r_stamp != rPriv->lastStamp) {
 398
 399       if (!flushed)
 400          st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 401       ctx->r_stamp = rPriv->lastStamp;
 402       st_resize_framebuffer(dri_drawable(rPriv)->stfb, rPriv->w, rPriv->h);
 403
 404    } else if (rPriv && dPriv == rPriv) {
 405
 406       ctx->r_stamp = ctx->d_stamp;
 407
 408    }
 409 }
 410
 411 void
 412 dri1_update_drawables(struct dri_context *ctx,
 413                       struct dri_drawable *draw, struct dri_drawable *read)
 414 {
 415    dri_lock(ctx);
 416    dri1_update_drawables_locked(ctx, draw->dPriv, read->dPriv);
 417    dri_unlock(ctx);
 418
 419    dri1_propagate_drawable_change(ctx);
 420 }
 421
 422 static INLINE boolean
 423 dri1_intersect_src_bbox(struct drm_clip_rect *dst,
 424                         int dst_x,
 425                         int dst_y,
 426                         const struct drm_clip_rect *src,
 427                         const struct drm_clip_rect *bbox)
 428 {
 429    int xy1;
 430    int xy2;
 431
 432    xy1 = ((int)src->x1 > (int)bbox->x1 + dst_x) ? src->x1 :
 433       (int)bbox->x1 + dst_x;
 434    xy2 = ((int)src->x2 < (int)bbox->x2 + dst_x) ? src->x2 :
 435       (int)bbox->x2 + dst_x;
 436    if (xy1 >= xy2 || xy1 < 0)
 437       return FALSE;
 438
 439    dst->x1 = xy1;
 440    dst->x2 = xy2;
 441
 442    xy1 = ((int)src->y1 > (int)bbox->y1 + dst_y) ? src->y1 :
 443       (int)bbox->y1 + dst_y;
 444    xy2 = ((int)src->y2 < (int)bbox->y2 + dst_y) ? src->y2 :
 445       (int)bbox->y2 + dst_y;
 446    if (xy1 >= xy2 || xy1 < 0)
 447       return FALSE;
 448
 449    dst->y1 = xy1;
 450    dst->y2 = xy2;
 451    return TRUE;
 452 }
 453
 454 static void
 455 dri1_swap_copy(struct dri_context *ctx,
 456                struct pipe_surface *dst,
 457                struct pipe_surface *src,
 458                __DRIdrawablePrivate * dPriv, const struct drm_clip_rect *bbox)
 459 {
 460    struct pipe_context *pipe = ctx->pipe;
 461    struct drm_clip_rect clip;
 462    struct drm_clip_rect *cur;
 463    int i;
 464
 465    cur = dPriv->pClipRects;
 466
 467    for (i = 0; i < dPriv->numClipRects; ++i) {
 468       if (dri1_intersect_src_bbox(&clip, dPriv->x, dPriv->y, cur++, bbox))
 469          pipe->surface_copy(pipe, dst, clip.x1, clip.y1,
 470                             src,
 471                             (int)clip.x1 - dPriv->x,
 472                             (int)clip.y1 - dPriv->y,
 473                             clip.x2 - clip.x1, clip.y2 - clip.y1);
 474    }
 475 }
 476
 477 static void
 478 dri1_copy_to_front(struct dri_context *ctx,
 479                    struct pipe_surface *surf,
 480                    __DRIdrawablePrivate * dPriv,
 481                    const struct drm_clip_rect *sub_box,
 482                    struct pipe_fence_handle **fence)
 483 {
 484    struct pipe_context *pipe = ctx->pipe;
 485    boolean save_lost_lock;
 486    uint cur_w;
 487    uint cur_h;
 488    struct drm_clip_rect bbox;
 489    boolean visible = TRUE;
 490
 491    *fence = NULL;
 492
 493    dri_lock(ctx);
 494    save_lost_lock = ctx->stLostLock;
 495    dri1_update_drawables_locked(ctx, dPriv, dPriv);
 496    st_get_framebuffer_dimensions(dri_drawable(dPriv)->stfb, &cur_w, &cur_h);
 497
 498    bbox.x1 = 0;
 499    bbox.x2 = cur_w;
 500    bbox.y1 = 0;
 501    bbox.y2 = cur_h;
 502
 503    if (sub_box)
 504       visible = dri1_intersect_src_bbox(&bbox, 0, 0, &bbox, sub_box);
 505
 506    if (visible && __dri1_api_hooks->present_locked) {
 507
 508       __dri1_api_hooks->present_locked(pipe,
 509                                        surf,
 510                                        dPriv->pClipRects,
 511                                        dPriv->numClipRects,
 512                                        dPriv->x, dPriv->y, &bbox, fence);
 513
 514    } else if (visible && __dri1_api_hooks->front_srf_locked) {
 515
 516       struct pipe_surface *front = __dri1_api_hooks->front_srf_locked(pipe);
 517
 518       if (front)
 519          dri1_swap_copy(ctx, front, surf, dPriv, &bbox);
 520
 521       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, fence);
 522    }
 523
 524    ctx->stLostLock = save_lost_lock;
 525
 526    /**
 527     * FIXME: Revisit this: Update drawables on copy_sub_buffer ?
 528     */
 529
 530    if (!sub_box)
 531       dri1_update_drawables_locked(ctx, ctx->dPriv, ctx->rPriv);
 532
 533    dri_unlock(ctx);
 534    dri1_propagate_drawable_change(ctx);
 535 }
 536
 537 void
 538 dri1_flush_frontbuffer(struct pipe_screen *screen,
 539                        struct pipe_surface *surf, void *context_private)
 540 {
 541    struct dri_context *ctx = (struct dri_context *)context_private;
 542    struct pipe_fence_handle *dummy_fence;
 543
 544    dri1_copy_to_front(ctx, surf, ctx->dPriv, NULL, &dummy_fence);
 545    screen->fence_reference(screen, &dummy_fence, NULL);
 546
 547    /**
 548     * FIXME: Do we need swap throttling here?
 549     */
 550 }
 551
 552 void
 553 dri_swap_buffers(__DRIdrawablePrivate * dPriv)
 554 {
 555    struct dri_context *ctx;
 556    struct pipe_surface *back_surf;
 557    struct dri_drawable *draw = dri_drawable(dPriv);
 558    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 559    struct pipe_fence_handle *fence;
 560    struct st_context *st = st_get_current();
 561
 562    assert(__dri1_api_hooks != NULL);
 563
 564    if (!st)
 565       return;                          /* For now */
 566
 567    ctx = (struct dri_context *)st->pipe->priv;
 568
 569    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 570    if (back_surf) {
 571       st_notify_swapbuffers(draw->stfb);
 572       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 573       fence = dri_swap_fences_pop_front(draw);
 574       if (fence) {
 575          (void)screen->fence_finish(screen, fence, 0);
 576          screen->fence_reference(screen, &fence, NULL);
 577       }
 578       dri1_copy_to_front(ctx, back_surf, dPriv, NULL, &fence);
 579       dri_swap_fences_push_back(draw, fence);
 580       screen->fence_reference(screen, &fence, NULL);
 581    }
 582 }
 583
 584 void
 585 dri_copy_sub_buffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 586 {
 587    struct pipe_screen *screen = dri_screen(dPriv->driScreenPriv)->pipe_screen;
 588    struct drm_clip_rect sub_bbox;
 589    struct dri_context *ctx;
 590    struct pipe_surface *back_surf;
 591    struct dri_drawable *draw = dri_drawable(dPriv);
 592    struct pipe_fence_handle *dummy_fence;
 593    struct st_context *st = st_get_current();
 594
 595    assert(__dri1_api_hooks != NULL);
 596
 597    if (!st)
 598       return;
 599
 600    ctx = (struct dri_context *)st->pipe->priv;
 601
 602    sub_bbox.x1 = x;
 603    sub_bbox.x2 = x + w;
 604    sub_bbox.y1 = y;
 605    sub_bbox.y2 = y + h;
 606
 607    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 608    if (back_surf) {
 609       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 610       dri1_copy_to_front(ctx, back_surf, dPriv, &sub_bbox, &dummy_fence);
 611       screen->fence_reference(screen, &dummy_fence, NULL);
 612    }
 613 }
 614
 615 /* vim: set sw=3 ts=8 sts=3 expandtab: */