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          continue;
 183       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 184          index = ST_SURFACE_FRONT_LEFT;
 185          format = drawable->color_format;
 186          break;
 187       case __DRI_BUFFER_BACK_LEFT:
 188          index = ST_SURFACE_BACK_LEFT;
 189          format = drawable->color_format;
 190          break;
 191       case __DRI_BUFFER_DEPTH:
 192          index = ST_SURFACE_DEPTH;
 193          format = drawable->depth_format;
 194          break;
 195       case __DRI_BUFFER_STENCIL:
 196          index = ST_SURFACE_DEPTH;
 197          format = drawable->stencil_format;
 198          break;
 199       case __DRI_BUFFER_ACCUM:
 200       default:
 201          assert(0);
 202       }
 203
 204       if (index == ST_SURFACE_DEPTH) {
 205          if (have_depth)
 206             continue;
 207          else
 208             have_depth = TRUE;
 209       }
 210
 211       surface = dri_surface_from_handle(api,
 212                                         screen,
 213                                         buffers[i].name,
 214                                         format,
 215                                         dri_drawable->w,
 216                                         dri_drawable->h, buffers[i].pitch);
 217
 218       st_set_framebuffer_surface(drawable->stfb, index, surface);
 219       pipe_surface_reference(&surface, NULL);
 220    }
 221    /* this needed, or else the state tracker fails to pick the new buffers */
 222    st_resize_framebuffer(drawable->stfb, dri_drawable->w, dri_drawable->h);
 223 }
 224
 225 /**
 226  * These are used for GLX_EXT_texture_from_pixmap
 227  */
 228 void dri2_set_tex_buffer2(__DRIcontext *pDRICtx, GLint target,
 229                           GLint format, __DRIdrawable *dPriv)
 230 {
 231    struct dri_drawable *drawable = dri_drawable(dPriv);
 232    struct pipe_surface *ps;
 233
 234    if (!drawable->stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer) {
 235       struct gl_renderbuffer *rb =
 236          st_new_renderbuffer_fb(drawable->color_format, 0 /*XXX*/, FALSE);
 237       _mesa_add_renderbuffer(&drawable->stfb->Base, BUFFER_FRONT_LEFT, rb);
 238    }
 239
 240    dri_get_buffers(drawable->dPriv);
 241    st_get_framebuffer_surface(drawable->stfb, ST_SURFACE_FRONT_LEFT, &ps);
 242
 243    st_bind_texture_surface(ps, target == GL_TEXTURE_2D ? ST_TEXTURE_2D :
 244                            ST_TEXTURE_RECT, 0,
 245                            format == GLX_TEXTURE_FORMAT_RGBA_EXT ?
 246                            PIPE_FORMAT_R8G8B8A8_UNORM : PIPE_FORMAT_R8G8B8X8_UNORM);
 247 }
 248
 249 void dri2_set_tex_buffer(__DRIcontext *pDRICtx, GLint target,
 250                          __DRIdrawable *dPriv)
 251 {
 252    dri2_set_tex_buffer2(pDRICtx, target, GLX_TEXTURE_FORMAT_RGBA_EXT, dPriv);
 253 }
 254
 255 void
 256 dri_flush_frontbuffer(struct pipe_screen *screen,
 257                       struct pipe_surface *surf, void *context_private)
 258 {
 259    struct dri_context *ctx = (struct dri_context *)context_private;
 260    struct dri_drawable *drawable = dri_drawable(ctx->dPriv);
 261    __DRIdrawable *dri_drawable = ctx->dPriv;
 262    __DRIscreen *dri_screen = ctx->sPriv;
 263
 264    /* XXX Does this function get called with DRI1? */
 265
 266    if (ctx->dPriv == NULL) {
 267       debug_printf("%s: no drawable bound to context\n", __func__);
 268       return;
 269    }
 270
 271 #if 0
 272    /* TODO if rendering to pixmaps is slow enable this code. */
 273    if (drawable->is_pixmap)
 274       return;
 275 #else
 276    (void)drawable;
 277 #endif
 278
 279    (*dri_screen->dri2.loader->flushFrontBuffer)(dri_drawable,
 280                                                 dri_drawable->loaderPrivate);
 281 }
 282
 283 /**
 284  * This is called when we need to set up GL rendering to a new X window.
 285  */
 286 boolean
 287 dri_create_buffer(__DRIscreenPrivate * sPriv,
 288                   __DRIdrawablePrivate * dPriv,
 289                   const __GLcontextModes * visual, boolean isPixmap)
 290 {
 291    struct dri_screen *screen = sPriv->private;
 292    struct dri_drawable *drawable = NULL;
 293    int i;
 294
 295    if (isPixmap)
 296       goto fail;                       /* not implemented */
 297
 298    drawable = CALLOC_STRUCT(dri_drawable);
 299    if (drawable == NULL)
 300       goto fail;
 301
 302    if (visual->redBits == 8) {
 303       if (visual->alphaBits == 8)
 304          drawable->color_format = PIPE_FORMAT_A8R8G8B8_UNORM;
 305       else
 306          drawable->color_format = PIPE_FORMAT_X8R8G8B8_UNORM;
 307    } else {
 308       drawable->color_format = PIPE_FORMAT_R5G6B5_UNORM;
 309    }
 310
 311    switch(visual->depthBits) {
 312    default:
 313    case 0:
 314       drawable->depth_format = PIPE_FORMAT_NONE;
 315       break;
 316    case 16:
 317       drawable->depth_format = PIPE_FORMAT_Z16_UNORM;
 318       break;
 319    case 24:
 320       if (visual->stencilBits == 0) {
 321          drawable->depth_format = (screen->d_depth_bits_last) ?
 322             PIPE_FORMAT_X8Z24_UNORM:
 323             PIPE_FORMAT_Z24X8_UNORM;
 324       } else {
 325          drawable->depth_format = (screen->sd_depth_bits_last) ?
 326             PIPE_FORMAT_S8Z24_UNORM:
 327             PIPE_FORMAT_Z24S8_UNORM;
 328       }
 329       break;
 330    case 32:
 331       drawable->depth_format = PIPE_FORMAT_Z32_UNORM;
 332       break;
 333    }
 334
 335    switch(visual->stencilBits) {
 336    default:
 337    case 0:
 338       drawable->stencil_format = PIPE_FORMAT_NONE;
 339       break;
 340    case 8:
 341       drawable->stencil_format = (screen->sd_depth_bits_last) ?
 342          PIPE_FORMAT_S8Z24_UNORM:
 343          PIPE_FORMAT_Z24S8_UNORM;
 344       break;
 345    }
 346
 347    drawable->stfb = st_create_framebuffer(visual,
 348                                           drawable->color_format,
 349                                           drawable->depth_format,
 350                                           drawable->stencil_format,
 351                                           dPriv->w,
 352                                           dPriv->h, (void *)drawable);
 353    if (drawable->stfb == NULL)
 354       goto fail;
 355
 356    drawable->sPriv = sPriv;
 357    drawable->dPriv = dPriv;
 358    dPriv->driverPrivate = (void *)drawable;
 359
 360    /* setup dri2 buffers information */
 361    /* TODO incase of double buffer visual, delay fake creation */
 362    i = 0;
 363    drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 364
 365    if (visual->doubleBufferMode)
 366       drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 367    else
 368       drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
 369    if (visual->depthBits)
 370       drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
 371    if (visual->stencilBits)
 372       drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
 373    drawable->num_attachments = i;
 374
 375    drawable->desired_fences = 2;
 376
 377    return GL_TRUE;
 378  fail:
 379    FREE(drawable);
 380    return GL_FALSE;
 381 }
 382
 383 static struct pipe_fence_handle *
 384 dri_swap_fences_pop_front(struct dri_drawable *draw)
 385 {
 386    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 387    struct pipe_fence_handle *fence = NULL;
 388
 389    if (draw->cur_fences >= draw->desired_fences) {
 390       screen->fence_reference(screen, &fence, draw->swap_fences[draw->tail]);
 391       screen->fence_reference(screen, &draw->swap_fences[draw->tail++], NULL);
 392       --draw->cur_fences;
 393       draw->tail &= DRI_SWAP_FENCES_MASK;
 394    }
 395    return fence;
 396 }
 397
 398 static void
 399 dri_swap_fences_push_back(struct dri_drawable *draw,
 400                           struct pipe_fence_handle *fence)
 401 {
 402    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 403
 404    if (!fence)
 405       return;
 406
 407    if (draw->cur_fences < DRI_SWAP_FENCES_MAX) {
 408       draw->cur_fences++;
 409       screen->fence_reference(screen, &draw->swap_fences[draw->head++],
 410                               fence);
 411       draw->head &= DRI_SWAP_FENCES_MASK;
 412    }
 413 }
 414
 415 void
 416 dri_destroy_buffer(__DRIdrawablePrivate * dPriv)
 417 {
 418    struct dri_drawable *drawable = dri_drawable(dPriv);
 419    struct pipe_fence_handle *fence;
 420    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 421
 422    st_unreference_framebuffer(drawable->stfb);
 423    drawable->desired_fences = 0;
 424    while (drawable->cur_fences) {
 425       fence = dri_swap_fences_pop_front(drawable);
 426       screen->fence_reference(screen, &fence, NULL);
 427    }
 428
 429    FREE(drawable);
 430 }
 431
 432 static void
 433 dri1_update_drawables_locked(struct dri_context *ctx,
 434                              __DRIdrawablePrivate * driDrawPriv,
 435                              __DRIdrawablePrivate * driReadPriv)
 436 {
 437    if (ctx->stLostLock) {
 438       ctx->stLostLock = FALSE;
 439       if (driDrawPriv == driReadPriv)
 440          DRI_VALIDATE_DRAWABLE_INFO(ctx->sPriv, driDrawPriv);
 441       else
 442          DRI_VALIDATE_TWO_DRAWABLES_INFO(ctx->sPriv, driDrawPriv,
 443                                          driReadPriv);
 444    }
 445 }
 446
 447 /**
 448  * This ensures all contexts which bind to a drawable pick up the
 449  * drawable change and signal new buffer state.
 450  * Calling st_resize_framebuffer for each context may seem like overkill,
 451  * but no new buffers will actually be allocated if the dimensions don't
 452  * change.
 453  */
 454
 455 static void
 456 dri1_propagate_drawable_change(struct dri_context *ctx)
 457 {
 458    __DRIdrawablePrivate *dPriv = ctx->dPriv;
 459    __DRIdrawablePrivate *rPriv = ctx->rPriv;
 460    boolean flushed = FALSE;
 461
 462    if (dPriv && ctx->d_stamp != dPriv->lastStamp) {
 463
 464       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 465       flushed = TRUE;
 466       ctx->d_stamp = dPriv->lastStamp;
 467       st_resize_framebuffer(dri_drawable(dPriv)->stfb, dPriv->w, dPriv->h);
 468
 469    }
 470
 471    if (rPriv && dPriv != rPriv && ctx->r_stamp != rPriv->lastStamp) {
 472
 473       if (!flushed)
 474          st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 475       ctx->r_stamp = rPriv->lastStamp;
 476       st_resize_framebuffer(dri_drawable(rPriv)->stfb, rPriv->w, rPriv->h);
 477
 478    } else if (rPriv && dPriv == rPriv) {
 479
 480       ctx->r_stamp = ctx->d_stamp;
 481
 482    }
 483 }
 484
 485 void
 486 dri1_update_drawables(struct dri_context *ctx,
 487                       struct dri_drawable *draw, struct dri_drawable *read)
 488 {
 489    dri_lock(ctx);
 490    dri1_update_drawables_locked(ctx, draw->dPriv, read->dPriv);
 491    dri_unlock(ctx);
 492
 493    dri1_propagate_drawable_change(ctx);
 494 }
 495
 496 static INLINE boolean
 497 dri1_intersect_src_bbox(struct drm_clip_rect *dst,
 498                         int dst_x,
 499                         int dst_y,
 500                         const struct drm_clip_rect *src,
 501                         const struct drm_clip_rect *bbox)
 502 {
 503    int xy1;
 504    int xy2;
 505
 506    xy1 = ((int)src->x1 > (int)bbox->x1 + dst_x) ? src->x1 :
 507       (int)bbox->x1 + dst_x;
 508    xy2 = ((int)src->x2 < (int)bbox->x2 + dst_x) ? src->x2 :
 509       (int)bbox->x2 + dst_x;
 510    if (xy1 >= xy2 || xy1 < 0)
 511       return FALSE;
 512
 513    dst->x1 = xy1;
 514    dst->x2 = xy2;
 515
 516    xy1 = ((int)src->y1 > (int)bbox->y1 + dst_y) ? src->y1 :
 517       (int)bbox->y1 + dst_y;
 518    xy2 = ((int)src->y2 < (int)bbox->y2 + dst_y) ? src->y2 :
 519       (int)bbox->y2 + dst_y;
 520    if (xy1 >= xy2 || xy1 < 0)
 521       return FALSE;
 522
 523    dst->y1 = xy1;
 524    dst->y2 = xy2;
 525    return TRUE;
 526 }
 527
 528 static void
 529 dri1_swap_copy(struct dri_context *ctx,
 530                struct pipe_surface *dst,
 531                struct pipe_surface *src,
 532                __DRIdrawablePrivate * dPriv, const struct drm_clip_rect *bbox)
 533 {
 534    struct pipe_context *pipe = ctx->pipe;
 535    struct drm_clip_rect clip;
 536    struct drm_clip_rect *cur;
 537    int i;
 538
 539    cur = dPriv->pClipRects;
 540
 541    for (i = 0; i < dPriv->numClipRects; ++i) {
 542       if (dri1_intersect_src_bbox(&clip, dPriv->x, dPriv->y, cur++, bbox))
 543          pipe->surface_copy(pipe, dst, clip.x1, clip.y1,
 544                             src,
 545                             (int)clip.x1 - dPriv->x,
 546                             (int)clip.y1 - dPriv->y,
 547                             clip.x2 - clip.x1, clip.y2 - clip.y1);
 548    }
 549 }
 550
 551 static void
 552 dri1_copy_to_front(struct dri_context *ctx,
 553                    struct pipe_surface *surf,
 554                    __DRIdrawablePrivate * dPriv,
 555                    const struct drm_clip_rect *sub_box,
 556                    struct pipe_fence_handle **fence)
 557 {
 558    struct pipe_context *pipe = ctx->pipe;
 559    boolean save_lost_lock;
 560    uint cur_w;
 561    uint cur_h;
 562    struct drm_clip_rect bbox;
 563    boolean visible = TRUE;
 564
 565    *fence = NULL;
 566
 567    dri_lock(ctx);
 568    save_lost_lock = ctx->stLostLock;
 569    dri1_update_drawables_locked(ctx, dPriv, dPriv);
 570    st_get_framebuffer_dimensions(dri_drawable(dPriv)->stfb, &cur_w, &cur_h);
 571
 572    bbox.x1 = 0;
 573    bbox.x2 = cur_w;
 574    bbox.y1 = 0;
 575    bbox.y2 = cur_h;
 576
 577    if (sub_box)
 578       visible = dri1_intersect_src_bbox(&bbox, 0, 0, &bbox, sub_box);
 579
 580    if (visible && __dri1_api_hooks->present_locked) {
 581
 582       __dri1_api_hooks->present_locked(pipe,
 583                                        surf,
 584                                        dPriv->pClipRects,
 585                                        dPriv->numClipRects,
 586                                        dPriv->x, dPriv->y, &bbox, fence);
 587
 588    } else if (visible && __dri1_api_hooks->front_srf_locked) {
 589
 590       struct pipe_surface *front = __dri1_api_hooks->front_srf_locked(pipe);
 591
 592       if (front)
 593          dri1_swap_copy(ctx, front, surf, dPriv, &bbox);
 594
 595       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, fence);
 596    }
 597
 598    ctx->stLostLock = save_lost_lock;
 599
 600    /**
 601     * FIXME: Revisit this: Update drawables on copy_sub_buffer ?
 602     */
 603
 604    if (!sub_box)
 605       dri1_update_drawables_locked(ctx, ctx->dPriv, ctx->rPriv);
 606
 607    dri_unlock(ctx);
 608    dri1_propagate_drawable_change(ctx);
 609 }
 610
 611 void
 612 dri1_flush_frontbuffer(struct pipe_screen *screen,
 613                        struct pipe_surface *surf, void *context_private)
 614 {
 615    struct dri_context *ctx = (struct dri_context *)context_private;
 616    struct pipe_fence_handle *dummy_fence;
 617
 618    dri1_copy_to_front(ctx, surf, ctx->dPriv, NULL, &dummy_fence);
 619    screen->fence_reference(screen, &dummy_fence, NULL);
 620
 621    /**
 622     * FIXME: Do we need swap throttling here?
 623     */
 624 }
 625
 626 void
 627 dri_swap_buffers(__DRIdrawablePrivate * dPriv)
 628 {
 629    struct dri_context *ctx;
 630    struct pipe_surface *back_surf;
 631    struct dri_drawable *draw = dri_drawable(dPriv);
 632    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 633    struct pipe_fence_handle *fence;
 634    struct st_context *st = st_get_current();
 635
 636    assert(__dri1_api_hooks != NULL);
 637
 638    if (!st)
 639       return;                          /* For now */
 640
 641    ctx = (struct dri_context *)st->pipe->priv;
 642
 643    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 644    if (back_surf) {
 645       st_notify_swapbuffers(draw->stfb);
 646       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 647       fence = dri_swap_fences_pop_front(draw);
 648       if (fence) {
 649          (void)screen->fence_finish(screen, fence, 0);
 650          screen->fence_reference(screen, &fence, NULL);
 651       }
 652       dri1_copy_to_front(ctx, back_surf, dPriv, NULL, &fence);
 653       dri_swap_fences_push_back(draw, fence);
 654       screen->fence_reference(screen, &fence, NULL);
 655    }
 656 }
 657
 658 void
 659 dri_copy_sub_buffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 660 {
 661    struct pipe_screen *screen = dri_screen(dPriv->driScreenPriv)->pipe_screen;
 662    struct drm_clip_rect sub_bbox;
 663    struct dri_context *ctx;
 664    struct pipe_surface *back_surf;
 665    struct dri_drawable *draw = dri_drawable(dPriv);
 666    struct pipe_fence_handle *dummy_fence;
 667    struct st_context *st = st_get_current();
 668
 669    assert(__dri1_api_hooks != NULL);
 670
 671    if (!st)
 672       return;
 673
 674    ctx = (struct dri_context *)st->pipe->priv;
 675
 676    sub_bbox.x1 = x;
 677    sub_bbox.x2 = x + w;
 678    sub_bbox.y1 = y;
 679    sub_bbox.y2 = y + h;
 680
 681    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 682    if (back_surf) {
 683       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 684       dri1_copy_to_front(ctx, back_surf, dPriv, &sub_bbox, &dummy_fence);
 685       screen->fence_reference(screen, &dummy_fence, NULL);
 686    }
 687 }
 688
 689 /* vim: set sw=3 ts=8 sts=3 expandtab: */