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 "main/mtypes.h"
  40 #include "main/renderbuffer.h"
  41 #include "state_tracker/drm_api.h"
  42 #include "state_tracker/dri1_api.h"
  43 #include "state_tracker/st_public.h"
  44 #include "state_tracker/st_context.h"
  45 #include "state_tracker/st_cb_fbo.h"
  46
  47 #include "util/u_memory.h"
  48
  49 static struct pipe_surface *
  50 dri_surface_from_handle(struct drm_api *api,
  51                         struct pipe_screen *screen,
  52                         unsigned handle,
  53                         enum pipe_format format,
  54                         unsigned width, unsigned height, unsigned pitch)
  55 {
  56    struct pipe_surface *surface = NULL;
  57    struct pipe_texture *texture = NULL;
  58    struct pipe_texture templat;
  59
  60    memset(&templat, 0, sizeof(templat));
  61    templat.tex_usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
  62    templat.target = PIPE_TEXTURE_2D;
  63    templat.last_level = 0;
  64    templat.depth[0] = 1;
  65    templat.format = format;
  66    templat.width[0] = width;
  67    templat.height[0] = height;
  68    pf_get_block(templat.format, &templat.block);
  69
  70    texture = api->texture_from_shared_handle(api, screen, &templat,
  71                                              "dri2 buffer", pitch, handle);
  72
  73    if (!texture) {
  74       debug_printf("%s: Failed to blanket the buffer with a texture\n", __func__);
  75       return NULL;
  76    }
  77
  78    surface = screen->get_tex_surface(screen, texture, 0, 0, 0,
  79                                      PIPE_BUFFER_USAGE_GPU_READ |
  80                                      PIPE_BUFFER_USAGE_GPU_WRITE);
  81
  82    /* we don't need the texture from this point on */
  83    pipe_texture_reference(&texture, NULL);
  84    return surface;
  85 }
  86
  87 /**
  88  * Pixmaps have will have the same name of fake front and front.
  89  */
  90 static boolean
  91 dri2_check_if_pixmap(__DRIbuffer *buffers, int count)
  92 {
  93    boolean found = FALSE;
  94    boolean is_pixmap = FALSE;
  95    unsigned name;
  96    int i;
  97
  98    for (i = 0; i < count; i++) {
  99       switch (buffers[i].attachment) {
 100       case __DRI_BUFFER_FRONT_LEFT:
 101       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 102          if (found) {
 103             is_pixmap = buffers[i].name == name;
 104          } else {
 105             name = buffers[i].name;
 106             found = TRUE;
 107          }
 108       default:
 109          continue;
 110       }
 111    }
 112
 113    return is_pixmap;
 114 }
 115
 116 /**
 117  * This will be called a drawable is known to have been resized.
 118  */
 119 void
 120 dri_get_buffers(__DRIdrawablePrivate * dPriv)
 121 {
 122
 123    struct dri_drawable *drawable = dri_drawable(dPriv);
 124    struct pipe_surface *surface = NULL;
 125    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 126    __DRIbuffer *buffers = NULL;
 127    __DRIscreen *dri_screen = drawable->sPriv;
 128    __DRIdrawable *dri_drawable = drawable->dPriv;
 129    struct drm_api *api = ((struct dri_screen*)(dri_screen->private))->api;
 130    boolean have_depth = FALSE;
 131    int i, count;
 132
 133    buffers = (*dri_screen->dri2.loader->getBuffers) (dri_drawable,
 134                                                      &dri_drawable->w,
 135                                                      &dri_drawable->h,
 136                                                      drawable->attachments,
 137                                                      drawable->
 138                                                      num_attachments, &count,
 139                                                      dri_drawable->
 140                                                      loaderPrivate);
 141
 142    if (buffers == NULL) {
 143       return;
 144    }
 145
 146    /* set one cliprect to cover the whole dri_drawable */
 147    dri_drawable->x = 0;
 148    dri_drawable->y = 0;
 149    dri_drawable->backX = 0;
 150    dri_drawable->backY = 0;
 151    dri_drawable->numClipRects = 1;
 152    dri_drawable->pClipRects[0].x1 = 0;
 153    dri_drawable->pClipRects[0].y1 = 0;
 154    dri_drawable->pClipRects[0].x2 = dri_drawable->w;
 155    dri_drawable->pClipRects[0].y2 = dri_drawable->h;
 156    dri_drawable->numBackClipRects = 1;
 157    dri_drawable->pBackClipRects[0].x1 = 0;
 158    dri_drawable->pBackClipRects[0].y1 = 0;
 159    dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
 160    dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 161
 162    if (drawable->old_num == count &&
 163        drawable->old_w == dri_drawable->w &&
 164        drawable->old_h == dri_drawable->h &&
 165        memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0) {
 166        return;
 167    } else {
 168       drawable->old_num = count;
 169       drawable->old_w = dri_drawable->w;
 170       drawable->old_h = dri_drawable->h;
 171       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
 172    }
 173
 174    drawable->is_pixmap = dri2_check_if_pixmap(buffers, count);
 175
 176    for (i = 0; i < count; i++) {
 177       enum pipe_format format = 0;
 178       int index = 0;
 179
 180       switch (buffers[i].attachment) {
 181       case __DRI_BUFFER_FRONT_LEFT:
 182       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 183          index = ST_SURFACE_FRONT_LEFT;
 184          format = drawable->color_format;
 185          break;
 186       case __DRI_BUFFER_BACK_LEFT:
 187          index = ST_SURFACE_BACK_LEFT;
 188          format = drawable->color_format;
 189          break;
 190       case __DRI_BUFFER_DEPTH:
 191       case __DRI_BUFFER_DEPTH_STENCIL:
 192       case __DRI_BUFFER_STENCIL:
 193          index = ST_SURFACE_DEPTH;
 194          format = drawable->depth_stencil_format;
 195          break;
 196       case __DRI_BUFFER_ACCUM:
 197       default:
 198          assert(0);
 199       }
 200
 201       if (index == ST_SURFACE_DEPTH) {
 202          if (have_depth)
 203             continue;
 204          else
 205             have_depth = TRUE;
 206       }
 207
 208       surface = dri_surface_from_handle(api,
 209                                         screen,
 210                                         buffers[i].name,
 211                                         format,
 212                                         dri_drawable->w,
 213                                         dri_drawable->h, buffers[i].pitch);
 214
 215       switch (buffers[i].attachment) {
 216       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 217       case __DRI_BUFFER_BACK_LEFT:
 218          drawable->color_format = surface->format;
 219          break;
 220       case __DRI_BUFFER_DEPTH:
 221       case __DRI_BUFFER_DEPTH_STENCIL:
 222       case __DRI_BUFFER_STENCIL:
 223          drawable->depth_stencil_format = surface->format;
 224          break;
 225       }
 226
 227       st_set_framebuffer_surface(drawable->stfb, index, surface);
 228       pipe_surface_reference(&surface, NULL);
 229    }
 230    /* this needed, or else the state tracker fails to pick the new buffers */
 231    st_resize_framebuffer(drawable->stfb, dri_drawable->w, dri_drawable->h);
 232 }
 233
 234 /**
 235  * These are used for GLX_EXT_texture_from_pixmap
 236  */
 237 void dri2_set_tex_buffer2(__DRIcontext *pDRICtx, GLint target,
 238                           GLint format, __DRIdrawable *dPriv)
 239 {
 240    struct dri_drawable *drawable = dri_drawable(dPriv);
 241    struct pipe_surface *ps;
 242
 243    if (!drawable->stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer) {
 244       struct gl_renderbuffer *rb =
 245          st_new_renderbuffer_fb(drawable->color_format, 0 /*XXX*/, FALSE);
 246       _mesa_add_renderbuffer(&drawable->stfb->Base, BUFFER_FRONT_LEFT, rb);
 247    }
 248
 249    dri_get_buffers(drawable->dPriv);
 250    st_get_framebuffer_surface(drawable->stfb, ST_SURFACE_FRONT_LEFT, &ps);
 251
 252    st_bind_texture_surface(ps, target == GL_TEXTURE_2D ? ST_TEXTURE_2D :
 253                            ST_TEXTURE_RECT, 0, drawable->color_format);
 254 }
 255
 256 void dri2_set_tex_buffer(__DRIcontext *pDRICtx, GLint target,
 257                          __DRIdrawable *dPriv)
 258 {
 259    dri2_set_tex_buffer2(pDRICtx, target, GLX_TEXTURE_FORMAT_RGBA_EXT, dPriv);
 260 }
 261
 262 void
 263 dri_flush_frontbuffer(struct pipe_screen *screen,
 264                       struct pipe_surface *surf, void *context_private)
 265 {
 266    struct dri_context *ctx = (struct dri_context *)context_private;
 267    struct dri_drawable *drawable = dri_drawable(ctx->dPriv);
 268    __DRIdrawable *dri_drawable = ctx->dPriv;
 269    __DRIscreen *dri_screen = ctx->sPriv;
 270
 271    /* XXX Does this function get called with DRI1? */
 272
 273    if (ctx->dPriv == NULL) {
 274       debug_printf("%s: no drawable bound to context\n", __func__);
 275       return;
 276    }
 277
 278 #if 0
 279    /* TODO if rendering to pixmaps is slow enable this code. */
 280    if (drawable->is_pixmap)
 281       return;
 282 #else
 283    (void)drawable;
 284 #endif
 285
 286    (*dri_screen->dri2.loader->flushFrontBuffer)(dri_drawable,
 287                                                 dri_drawable->loaderPrivate);
 288 }
 289
 290 /**
 291  * This is called when we need to set up GL rendering to a new X window.
 292  */
 293 boolean
 294 dri_create_buffer(__DRIscreenPrivate * sPriv,
 295                   __DRIdrawablePrivate * dPriv,
 296                   const __GLcontextModes * visual, boolean isPixmap)
 297 {
 298    struct dri_screen *screen = sPriv->private;
 299    struct dri_drawable *drawable = NULL;
 300    int i;
 301
 302    if (isPixmap)
 303       goto fail;                       /* not implemented */
 304
 305    drawable = CALLOC_STRUCT(dri_drawable);
 306    if (drawable == NULL)
 307       goto fail;
 308
 309    if (visual->redBits == 8) {
 310       if (visual->alphaBits == 8)
 311          drawable->color_format = PIPE_FORMAT_A8R8G8B8_UNORM;
 312       else
 313          drawable->color_format = PIPE_FORMAT_X8R8G8B8_UNORM;
 314    } else {
 315       drawable->color_format = PIPE_FORMAT_R5G6B5_UNORM;
 316    }
 317
 318    switch(visual->depthBits) {
 319    default:
 320    case 0:
 321       drawable->depth_stencil_format = PIPE_FORMAT_NONE;
 322       break;
 323    case 16:
 324       drawable->depth_stencil_format = PIPE_FORMAT_Z16_UNORM;
 325       break;
 326    case 24:
 327       if (visual->stencilBits == 0) {
 328          drawable->depth_stencil_format = (screen->d_depth_bits_last) ?
 329             PIPE_FORMAT_X8Z24_UNORM:
 330             PIPE_FORMAT_Z24X8_UNORM;
 331       } else {
 332          drawable->depth_stencil_format = (screen->sd_depth_bits_last) ?
 333             PIPE_FORMAT_S8Z24_UNORM:
 334             PIPE_FORMAT_Z24S8_UNORM;
 335       }
 336       break;
 337    case 32:
 338       drawable->depth_stencil_format = PIPE_FORMAT_Z32_UNORM;
 339       break;
 340    }
 341
 342    drawable->stfb = st_create_framebuffer(visual,
 343                                           drawable->color_format,
 344                                           drawable->depth_stencil_format,
 345                                           drawable->depth_stencil_format,
 346                                           dPriv->w,
 347                                           dPriv->h, (void *)drawable);
 348    if (drawable->stfb == NULL)
 349       goto fail;
 350
 351    drawable->sPriv = sPriv;
 352    drawable->dPriv = dPriv;
 353    dPriv->driverPrivate = (void *)drawable;
 354
 355    /* setup dri2 buffers information */
 356    /* TODO incase of double buffer visual, delay fake creation */
 357    i = 0;
 358    drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 359
 360    if (visual->doubleBufferMode)
 361       drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 362    if (visual->depthBits && visual->stencilBits)
 363       drawable->attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
 364    else if (visual->depthBits)
 365       drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
 366    else if (visual->stencilBits)
 367       drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
 368    drawable->num_attachments = i;
 369
 370    drawable->desired_fences = 2;
 371
 372    return GL_TRUE;
 373  fail:
 374    FREE(drawable);
 375    return GL_FALSE;
 376 }
 377
 378 static struct pipe_fence_handle *
 379 dri_swap_fences_pop_front(struct dri_drawable *draw)
 380 {
 381    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 382    struct pipe_fence_handle *fence = NULL;
 383
 384    if (draw->cur_fences >= draw->desired_fences) {
 385       screen->fence_reference(screen, &fence, draw->swap_fences[draw->tail]);
 386       screen->fence_reference(screen, &draw->swap_fences[draw->tail++], NULL);
 387       --draw->cur_fences;
 388       draw->tail &= DRI_SWAP_FENCES_MASK;
 389    }
 390    return fence;
 391 }
 392
 393 static void
 394 dri_swap_fences_push_back(struct dri_drawable *draw,
 395                           struct pipe_fence_handle *fence)
 396 {
 397    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 398
 399    if (!fence)
 400       return;
 401
 402    if (draw->cur_fences < DRI_SWAP_FENCES_MAX) {
 403       draw->cur_fences++;
 404       screen->fence_reference(screen, &draw->swap_fences[draw->head++],
 405                               fence);
 406       draw->head &= DRI_SWAP_FENCES_MASK;
 407    }
 408 }
 409
 410 void
 411 dri_destroy_buffer(__DRIdrawablePrivate * dPriv)
 412 {
 413    struct dri_drawable *drawable = dri_drawable(dPriv);
 414    struct pipe_fence_handle *fence;
 415    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 416
 417    st_unreference_framebuffer(drawable->stfb);
 418    drawable->desired_fences = 0;
 419    while (drawable->cur_fences) {
 420       fence = dri_swap_fences_pop_front(drawable);
 421       screen->fence_reference(screen, &fence, NULL);
 422    }
 423
 424    FREE(drawable);
 425 }
 426
 427 static void
 428 dri1_update_drawables_locked(struct dri_context *ctx,
 429                              __DRIdrawablePrivate * driDrawPriv,
 430                              __DRIdrawablePrivate * driReadPriv)
 431 {
 432    if (ctx->stLostLock) {
 433       ctx->stLostLock = FALSE;
 434       if (driDrawPriv == driReadPriv)
 435          DRI_VALIDATE_DRAWABLE_INFO(ctx->sPriv, driDrawPriv);
 436       else
 437          DRI_VALIDATE_TWO_DRAWABLES_INFO(ctx->sPriv, driDrawPriv,
 438                                          driReadPriv);
 439    }
 440 }
 441
 442 /**
 443  * This ensures all contexts which bind to a drawable pick up the
 444  * drawable change and signal new buffer state.
 445  * Calling st_resize_framebuffer for each context may seem like overkill,
 446  * but no new buffers will actually be allocated if the dimensions don't
 447  * change.
 448  */
 449
 450 static void
 451 dri1_propagate_drawable_change(struct dri_context *ctx)
 452 {
 453    __DRIdrawablePrivate *dPriv = ctx->dPriv;
 454    __DRIdrawablePrivate *rPriv = ctx->rPriv;
 455    boolean flushed = FALSE;
 456
 457    if (dPriv && ctx->d_stamp != dPriv->lastStamp) {
 458
 459       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 460       flushed = TRUE;
 461       ctx->d_stamp = dPriv->lastStamp;
 462       st_resize_framebuffer(dri_drawable(dPriv)->stfb, dPriv->w, dPriv->h);
 463
 464    }
 465
 466    if (rPriv && dPriv != rPriv && ctx->r_stamp != rPriv->lastStamp) {
 467
 468       if (!flushed)
 469          st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 470       ctx->r_stamp = rPriv->lastStamp;
 471       st_resize_framebuffer(dri_drawable(rPriv)->stfb, rPriv->w, rPriv->h);
 472
 473    } else if (rPriv && dPriv == rPriv) {
 474
 475       ctx->r_stamp = ctx->d_stamp;
 476
 477    }
 478 }
 479
 480 void
 481 dri1_update_drawables(struct dri_context *ctx,
 482                       struct dri_drawable *draw, struct dri_drawable *read)
 483 {
 484    dri_lock(ctx);
 485    dri1_update_drawables_locked(ctx, draw->dPriv, read->dPriv);
 486    dri_unlock(ctx);
 487
 488    dri1_propagate_drawable_change(ctx);
 489 }
 490
 491 static INLINE boolean
 492 dri1_intersect_src_bbox(struct drm_clip_rect *dst,
 493                         int dst_x,
 494                         int dst_y,
 495                         const struct drm_clip_rect *src,
 496                         const struct drm_clip_rect *bbox)
 497 {
 498    int xy1;
 499    int xy2;
 500
 501    xy1 = ((int)src->x1 > (int)bbox->x1 + dst_x) ? src->x1 :
 502       (int)bbox->x1 + dst_x;
 503    xy2 = ((int)src->x2 < (int)bbox->x2 + dst_x) ? src->x2 :
 504       (int)bbox->x2 + dst_x;
 505    if (xy1 >= xy2 || xy1 < 0)
 506       return FALSE;
 507
 508    dst->x1 = xy1;
 509    dst->x2 = xy2;
 510
 511    xy1 = ((int)src->y1 > (int)bbox->y1 + dst_y) ? src->y1 :
 512       (int)bbox->y1 + dst_y;
 513    xy2 = ((int)src->y2 < (int)bbox->y2 + dst_y) ? src->y2 :
 514       (int)bbox->y2 + dst_y;
 515    if (xy1 >= xy2 || xy1 < 0)
 516       return FALSE;
 517
 518    dst->y1 = xy1;
 519    dst->y2 = xy2;
 520    return TRUE;
 521 }
 522
 523 static void
 524 dri1_swap_copy(struct dri_context *ctx,
 525                struct pipe_surface *dst,
 526                struct pipe_surface *src,
 527                __DRIdrawablePrivate * dPriv, const struct drm_clip_rect *bbox)
 528 {
 529    struct pipe_context *pipe = ctx->pipe;
 530    struct drm_clip_rect clip;
 531    struct drm_clip_rect *cur;
 532    int i;
 533
 534    cur = dPriv->pClipRects;
 535
 536    for (i = 0; i < dPriv->numClipRects; ++i) {
 537       if (dri1_intersect_src_bbox(&clip, dPriv->x, dPriv->y, cur++, bbox))
 538          pipe->surface_copy(pipe, dst, clip.x1, clip.y1,
 539                             src,
 540                             (int)clip.x1 - dPriv->x,
 541                             (int)clip.y1 - dPriv->y,
 542                             clip.x2 - clip.x1, clip.y2 - clip.y1);
 543    }
 544 }
 545
 546 static void
 547 dri1_copy_to_front(struct dri_context *ctx,
 548                    struct pipe_surface *surf,
 549                    __DRIdrawablePrivate * dPriv,
 550                    const struct drm_clip_rect *sub_box,
 551                    struct pipe_fence_handle **fence)
 552 {
 553    struct pipe_context *pipe = ctx->pipe;
 554    boolean save_lost_lock;
 555    uint cur_w;
 556    uint cur_h;
 557    struct drm_clip_rect bbox;
 558    boolean visible = TRUE;
 559
 560    *fence = NULL;
 561
 562    dri_lock(ctx);
 563    save_lost_lock = ctx->stLostLock;
 564    dri1_update_drawables_locked(ctx, dPriv, dPriv);
 565    st_get_framebuffer_dimensions(dri_drawable(dPriv)->stfb, &cur_w, &cur_h);
 566
 567    bbox.x1 = 0;
 568    bbox.x2 = cur_w;
 569    bbox.y1 = 0;
 570    bbox.y2 = cur_h;
 571
 572    if (sub_box)
 573       visible = dri1_intersect_src_bbox(&bbox, 0, 0, &bbox, sub_box);
 574
 575    if (visible && __dri1_api_hooks->present_locked) {
 576
 577       __dri1_api_hooks->present_locked(pipe,
 578                                        surf,
 579                                        dPriv->pClipRects,
 580                                        dPriv->numClipRects,
 581                                        dPriv->x, dPriv->y, &bbox, fence);
 582
 583    } else if (visible && __dri1_api_hooks->front_srf_locked) {
 584
 585       struct pipe_surface *front = __dri1_api_hooks->front_srf_locked(pipe);
 586
 587       if (front)
 588          dri1_swap_copy(ctx, front, surf, dPriv, &bbox);
 589
 590       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, fence);
 591    }
 592
 593    ctx->stLostLock = save_lost_lock;
 594
 595    /**
 596     * FIXME: Revisit this: Update drawables on copy_sub_buffer ?
 597     */
 598
 599    if (!sub_box)
 600       dri1_update_drawables_locked(ctx, ctx->dPriv, ctx->rPriv);
 601
 602    dri_unlock(ctx);
 603    dri1_propagate_drawable_change(ctx);
 604 }
 605
 606 void
 607 dri1_flush_frontbuffer(struct pipe_screen *screen,
 608                        struct pipe_surface *surf, void *context_private)
 609 {
 610    struct dri_context *ctx = (struct dri_context *)context_private;
 611    struct pipe_fence_handle *dummy_fence;
 612
 613    dri1_copy_to_front(ctx, surf, ctx->dPriv, NULL, &dummy_fence);
 614    screen->fence_reference(screen, &dummy_fence, NULL);
 615
 616    /**
 617     * FIXME: Do we need swap throttling here?
 618     */
 619 }
 620
 621 void
 622 dri_swap_buffers(__DRIdrawablePrivate * dPriv)
 623 {
 624    struct dri_context *ctx;
 625    struct pipe_surface *back_surf;
 626    struct dri_drawable *draw = dri_drawable(dPriv);
 627    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 628    struct pipe_fence_handle *fence;
 629    struct st_context *st = st_get_current();
 630
 631    assert(__dri1_api_hooks != NULL);
 632
 633    if (!st)
 634       return;                          /* For now */
 635
 636    ctx = (struct dri_context *)st->pipe->priv;
 637
 638    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 639    if (back_surf) {
 640       st_notify_swapbuffers(draw->stfb);
 641       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 642       fence = dri_swap_fences_pop_front(draw);
 643       if (fence) {
 644          (void)screen->fence_finish(screen, fence, 0);
 645          screen->fence_reference(screen, &fence, NULL);
 646       }
 647       dri1_copy_to_front(ctx, back_surf, dPriv, NULL, &fence);
 648       dri_swap_fences_push_back(draw, fence);
 649       screen->fence_reference(screen, &fence, NULL);
 650    }
 651 }
 652
 653 void
 654 dri_copy_sub_buffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 655 {
 656    struct pipe_screen *screen = dri_screen(dPriv->driScreenPriv)->pipe_screen;
 657    struct drm_clip_rect sub_bbox;
 658    struct dri_context *ctx;
 659    struct pipe_surface *back_surf;
 660    struct dri_drawable *draw = dri_drawable(dPriv);
 661    struct pipe_fence_handle *dummy_fence;
 662    struct st_context *st = st_get_current();
 663
 664    assert(__dri1_api_hooks != NULL);
 665
 666    if (!st)
 667       return;
 668
 669    ctx = (struct dri_context *)st->pipe->priv;
 670
 671    sub_bbox.x1 = x;
 672    sub_bbox.x2 = x + w;
 673    sub_bbox.y1 = y;
 674    sub_bbox.y2 = y + h;
 675
 676    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 677    if (back_surf) {
 678       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 679       dri1_copy_to_front(ctx, back_surf, dPriv, &sub_bbox, &dummy_fence);
 680       screen->fence_reference(screen, &dummy_fence, NULL);
 681    }
 682 }
 683
 684 /* vim: set sw=3 ts=8 sts=3 expandtab: */