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 struct pipe_surface *
  48 dri_surface_from_handle(struct drm_api *api,
  49                         struct pipe_screen *screen,
  50                         unsigned handle,
  51                         enum pipe_format format,
  52                         unsigned width, unsigned height, unsigned pitch)
  53 {
  54    struct pipe_surface *surface = NULL;
  55    struct pipe_texture *texture = NULL;
  56    struct pipe_texture templat;
  57    struct pipe_buffer *buf = NULL;
  58
  59    buf = api->buffer_from_handle(api, screen, "dri2 buffer", handle);
  60    if (!buf) {
  61       debug_printf("%s: Failed to get buffer from handle\n", __func__);
  62       return NULL;
  63    }
  64
  65    memset(&templat, 0, sizeof(templat));
  66    templat.tex_usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
  67    templat.target = PIPE_TEXTURE_2D;
  68    templat.last_level = 0;
  69    templat.depth[0] = 1;
  70    templat.format = format;
  71    templat.width[0] = width;
  72    templat.height[0] = height;
  73    pf_get_block(templat.format, &templat.block);
  74
  75    texture = screen->texture_blanket(screen, &templat, &pitch, buf);
  76
  77    /* we don't need the buffer from this point on */
  78    pipe_buffer_reference(&buf, NULL);
  79
  80    if (!texture) {
  81       debug_printf("%s: Failed to blanket the buffer with a texture\n", __func__);
  82       return NULL;
  83    }
  84
  85    surface = screen->get_tex_surface(screen, texture, 0, 0, 0,
  86                                      PIPE_BUFFER_USAGE_GPU_READ |
  87                                      PIPE_BUFFER_USAGE_GPU_WRITE);
  88
  89    /* we don't need the texture from this point on */
  90    pipe_texture_reference(&texture, NULL);
  91    return surface;
  92 }
  93
  94 /**
  95  * Pixmaps have will have the same name of fake front and front.
  96  */
  97 static boolean
  98 dri2_check_if_pixmap(__DRIbuffer *buffers, int count)
  99 {
 100    boolean found = FALSE;
 101    boolean is_pixmap = FALSE;
 102    unsigned name;
 103    int i;
 104
 105    for (i = 0; i < count; i++) {
 106       switch (buffers[i].attachment) {
 107       case __DRI_BUFFER_FRONT_LEFT:
 108       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 109          if (found) {
 110             is_pixmap = buffers[i].name == name;
 111          } else {
 112             name = buffers[i].name;
 113             found = TRUE;
 114          }
 115       default:
 116          continue;
 117       }
 118    }
 119
 120    return is_pixmap;
 121 }
 122
 123 /**
 124  * This will be called a drawable is known to have been resized.
 125  */
 126 void
 127 dri_get_buffers(__DRIdrawablePrivate * dPriv)
 128 {
 129
 130    struct dri_drawable *drawable = dri_drawable(dPriv);
 131    struct pipe_surface *surface = NULL;
 132    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 133    __DRIbuffer *buffers = NULL;
 134    __DRIscreen *dri_screen = drawable->sPriv;
 135    __DRIdrawable *dri_drawable = drawable->dPriv;
 136    struct drm_api *api = ((struct dri_screen*)(dri_screen->private))->api;
 137    boolean have_depth = FALSE;
 138    int i, count;
 139
 140    buffers = (*dri_screen->dri2.loader->getBuffers) (dri_drawable,
 141                                                      &dri_drawable->w,
 142                                                      &dri_drawable->h,
 143                                                      drawable->attachments,
 144                                                      drawable->
 145                                                      num_attachments, &count,
 146                                                      dri_drawable->
 147                                                      loaderPrivate);
 148
 149    if (buffers == NULL) {
 150       return;
 151    }
 152
 153    /* set one cliprect to cover the whole dri_drawable */
 154    dri_drawable->x = 0;
 155    dri_drawable->y = 0;
 156    dri_drawable->backX = 0;
 157    dri_drawable->backY = 0;
 158    dri_drawable->numClipRects = 1;
 159    dri_drawable->pClipRects[0].x1 = 0;
 160    dri_drawable->pClipRects[0].y1 = 0;
 161    dri_drawable->pClipRects[0].x2 = dri_drawable->w;
 162    dri_drawable->pClipRects[0].y2 = dri_drawable->h;
 163    dri_drawable->numBackClipRects = 1;
 164    dri_drawable->pBackClipRects[0].x1 = 0;
 165    dri_drawable->pBackClipRects[0].y1 = 0;
 166    dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
 167    dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 168
 169    if (drawable->old_num == count &&
 170        drawable->old_w == dri_drawable->w &&
 171        drawable->old_h == dri_drawable->h &&
 172        memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0) {
 173        return;
 174    } else {
 175       drawable->old_num = count;
 176       drawable->old_w = dri_drawable->w;
 177       drawable->old_h = dri_drawable->h;
 178       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
 179    }
 180
 181    drawable->is_pixmap = dri2_check_if_pixmap(buffers, count);
 182
 183    for (i = 0; i < count; i++) {
 184       enum pipe_format format = 0;
 185       int index = 0;
 186
 187       switch (buffers[i].attachment) {
 188       case __DRI_BUFFER_FRONT_LEFT:
 189          continue;
 190       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 191          index = ST_SURFACE_FRONT_LEFT;
 192          format = drawable->color_format;
 193          break;
 194       case __DRI_BUFFER_BACK_LEFT:
 195          index = ST_SURFACE_BACK_LEFT;
 196          format = drawable->color_format;
 197          break;
 198       case __DRI_BUFFER_DEPTH:
 199          index = ST_SURFACE_DEPTH;
 200          format = drawable->depth_format;
 201          break;
 202       case __DRI_BUFFER_STENCIL:
 203          index = ST_SURFACE_DEPTH;
 204          format = drawable->stencil_format;
 205          break;
 206       case __DRI_BUFFER_ACCUM:
 207       default:
 208          assert(0);
 209       }
 210
 211       if (index == ST_SURFACE_DEPTH) {
 212          if (have_depth)
 213             continue;
 214          else
 215             have_depth = TRUE;
 216       }
 217
 218       surface = dri_surface_from_handle(api,
 219                                         screen,
 220                                         buffers[i].name,
 221                                         format,
 222                                         dri_drawable->w,
 223                                         dri_drawable->h, buffers[i].pitch);
 224
 225       st_set_framebuffer_surface(drawable->stfb, index, surface);
 226       pipe_surface_reference(&surface, NULL);
 227    }
 228    /* this needed, or else the state tracker fails to pick the new buffers */
 229    st_resize_framebuffer(drawable->stfb, dri_drawable->w, dri_drawable->h);
 230 }
 231
 232 /**
 233  * These are used for GLX_EXT_texture_from_pixmap
 234  */
 235 void dri2_set_tex_buffer2(__DRIcontext *pDRICtx, GLint target,
 236                           GLint format, __DRIdrawable *dPriv)
 237 {
 238    struct dri_drawable *drawable = dri_drawable(dPriv);
 239    struct pipe_surface *ps;
 240
 241    dri_get_buffers(drawable->dPriv);
 242    st_get_framebuffer_surface(drawable->stfb, ST_SURFACE_FRONT_LEFT, &ps);
 243
 244    st_bind_texture_surface(ps, target == GL_TEXTURE_2D ? ST_TEXTURE_2D :
 245                            ST_TEXTURE_RECT, 0,
 246                            format == GLX_TEXTURE_FORMAT_RGBA_EXT ?
 247                            PIPE_FORMAT_R8G8B8A8_UNORM : PIPE_FORMAT_R8G8B8X8_UNORM);
 248 }
 249
 250 void dri2_set_tex_buffer(__DRIcontext *pDRICtx, GLint target,
 251                          __DRIdrawable *dPriv)
 252 {
 253    dri2_set_tex_buffer2(pDRICtx, target, GLX_TEXTURE_FORMAT_RGBA_EXT, dPriv);
 254 }
 255
 256 void
 257 dri_flush_frontbuffer(struct pipe_screen *screen,
 258                       struct pipe_surface *surf, void *context_private)
 259 {
 260    struct dri_context *ctx = (struct dri_context *)context_private;
 261    struct dri_drawable *drawable = dri_drawable(ctx->dPriv);
 262    __DRIdrawable *dri_drawable = ctx->dPriv;
 263    __DRIscreen *dri_screen = ctx->sPriv;
 264
 265    /* XXX Does this function get called with DRI1? */
 266
 267    if (ctx->dPriv == NULL) {
 268       debug_printf("%s: no drawable bound to context\n", __func__);
 269       return;
 270    }
 271
 272 #if 0
 273    /* TODO if rendering to pixmaps is slow enable this code. */
 274    if (drawable->is_pixmap)
 275       return;
 276 #endif
 277
 278    (*dri_screen->dri2.loader->flushFrontBuffer)(dri_drawable,
 279                                                 dri_drawable->loaderPrivate);
 280 }
 281
 282 /**
 283  * This is called when we need to set up GL rendering to a new X window.
 284  */
 285 boolean
 286 dri_create_buffer(__DRIscreenPrivate * sPriv,
 287                   __DRIdrawablePrivate * dPriv,
 288                   const __GLcontextModes * visual, boolean isPixmap)
 289 {
 290    struct dri_screen *screen = sPriv->private;
 291    struct dri_drawable *drawable = NULL;
 292    int i;
 293
 294    if (isPixmap)
 295       goto fail;                       /* not implemented */
 296
 297    drawable = CALLOC_STRUCT(dri_drawable);
 298    if (drawable == NULL)
 299       goto fail;
 300
 301    if (visual->redBits == 8) {
 302       if (visual->alphaBits == 8)
 303          drawable->color_format = PIPE_FORMAT_A8R8G8B8_UNORM;
 304       else
 305          drawable->color_format = PIPE_FORMAT_X8R8G8B8_UNORM;
 306    } else {
 307       drawable->color_format = PIPE_FORMAT_R5G6B5_UNORM;
 308    }
 309
 310    switch(visual->depthBits) {
 311    default:
 312    case 0:
 313       drawable->depth_format = PIPE_FORMAT_NONE;
 314       break;
 315    case 16:
 316       drawable->depth_format = PIPE_FORMAT_Z16_UNORM;
 317       break;
 318    case 24:
 319       if (visual->stencilBits == 0) {
 320          drawable->depth_format = (screen->d_depth_bits_last) ?
 321             PIPE_FORMAT_X8Z24_UNORM:
 322             PIPE_FORMAT_Z24X8_UNORM;
 323       } else {
 324          drawable->depth_format = (screen->sd_depth_bits_last) ?
 325             PIPE_FORMAT_S8Z24_UNORM:
 326             PIPE_FORMAT_Z24S8_UNORM;
 327       }
 328       break;
 329    case 32:
 330       drawable->depth_format = PIPE_FORMAT_Z32_UNORM;
 331       break;
 332    }
 333
 334    switch(visual->stencilBits) {
 335    default:
 336    case 0:
 337       drawable->stencil_format = PIPE_FORMAT_NONE;
 338       break;
 339    case 8:
 340       drawable->stencil_format = (screen->sd_depth_bits_last) ?
 341          PIPE_FORMAT_S8Z24_UNORM:
 342          PIPE_FORMAT_Z24S8_UNORM;
 343       break;
 344    }
 345
 346    drawable->stfb = st_create_framebuffer(visual,
 347                                           drawable->color_format,
 348                                           drawable->depth_format,
 349                                           drawable->stencil_format,
 350                                           dPriv->w,
 351                                           dPriv->h, (void *)drawable);
 352    if (drawable->stfb == NULL)
 353       goto fail;
 354
 355    drawable->sPriv = sPriv;
 356    drawable->dPriv = dPriv;
 357    dPriv->driverPrivate = (void *)drawable;
 358
 359    /* setup dri2 buffers information */
 360    /* TODO incase of double buffer visual, delay fake creation */
 361    i = 0;
 362    drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 363    drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
 364
 365    if (visual->doubleBufferMode)
 366       drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 367    if (visual->depthBits)
 368       drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
 369    if (visual->stencilBits)
 370       drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
 371    drawable->num_attachments = i;
 372
 373    drawable->desired_fences = 2;
 374
 375    return GL_TRUE;
 376  fail:
 377    FREE(drawable);
 378    return GL_FALSE;
 379 }
 380
 381 static struct pipe_fence_handle *
 382 dri_swap_fences_pop_front(struct dri_drawable *draw)
 383 {
 384    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 385    struct pipe_fence_handle *fence = NULL;
 386
 387    if (draw->cur_fences >= draw->desired_fences) {
 388       screen->fence_reference(screen, &fence, draw->swap_fences[draw->tail]);
 389       screen->fence_reference(screen, &draw->swap_fences[draw->tail++], NULL);
 390       --draw->cur_fences;
 391       draw->tail &= DRI_SWAP_FENCES_MASK;
 392    }
 393    return fence;
 394 }
 395
 396 static void
 397 dri_swap_fences_push_back(struct dri_drawable *draw,
 398                           struct pipe_fence_handle *fence)
 399 {
 400    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 401
 402    if (!fence)
 403       return;
 404
 405    if (draw->cur_fences < DRI_SWAP_FENCES_MAX) {
 406       draw->cur_fences++;
 407       screen->fence_reference(screen, &draw->swap_fences[draw->head++],
 408                               fence);
 409       draw->head &= DRI_SWAP_FENCES_MASK;
 410    }
 411 }
 412
 413 void
 414 dri_destroy_buffer(__DRIdrawablePrivate * dPriv)
 415 {
 416    struct dri_drawable *drawable = dri_drawable(dPriv);
 417    struct pipe_fence_handle *fence;
 418    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 419
 420    st_unreference_framebuffer(drawable->stfb);
 421    drawable->desired_fences = 0;
 422    while (drawable->cur_fences) {
 423       fence = dri_swap_fences_pop_front(drawable);
 424       screen->fence_reference(screen, &fence, NULL);
 425    }
 426
 427    FREE(drawable);
 428 }
 429
 430 static void
 431 dri1_update_drawables_locked(struct dri_context *ctx,
 432                              __DRIdrawablePrivate * driDrawPriv,
 433                              __DRIdrawablePrivate * driReadPriv)
 434 {
 435    if (ctx->stLostLock) {
 436       ctx->stLostLock = FALSE;
 437       if (driDrawPriv == driReadPriv)
 438          DRI_VALIDATE_DRAWABLE_INFO(ctx->sPriv, driDrawPriv);
 439       else
 440          DRI_VALIDATE_TWO_DRAWABLES_INFO(ctx->sPriv, driDrawPriv,
 441                                          driReadPriv);
 442    }
 443 }
 444
 445 /**
 446  * This ensures all contexts which bind to a drawable pick up the
 447  * drawable change and signal new buffer state.
 448  * Calling st_resize_framebuffer for each context may seem like overkill,
 449  * but no new buffers will actually be allocated if the dimensions don't
 450  * change.
 451  */
 452
 453 static void
 454 dri1_propagate_drawable_change(struct dri_context *ctx)
 455 {
 456    __DRIdrawablePrivate *dPriv = ctx->dPriv;
 457    __DRIdrawablePrivate *rPriv = ctx->rPriv;
 458    boolean flushed = FALSE;
 459
 460    if (dPriv && ctx->d_stamp != dPriv->lastStamp) {
 461
 462       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 463       flushed = TRUE;
 464       ctx->d_stamp = dPriv->lastStamp;
 465       st_resize_framebuffer(dri_drawable(dPriv)->stfb, dPriv->w, dPriv->h);
 466
 467    }
 468
 469    if (rPriv && dPriv != rPriv && ctx->r_stamp != rPriv->lastStamp) {
 470
 471       if (!flushed)
 472          st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 473       ctx->r_stamp = rPriv->lastStamp;
 474       st_resize_framebuffer(dri_drawable(rPriv)->stfb, rPriv->w, rPriv->h);
 475
 476    } else if (rPriv && dPriv == rPriv) {
 477
 478       ctx->r_stamp = ctx->d_stamp;
 479
 480    }
 481 }
 482
 483 void
 484 dri1_update_drawables(struct dri_context *ctx,
 485                       struct dri_drawable *draw, struct dri_drawable *read)
 486 {
 487    dri_lock(ctx);
 488    dri1_update_drawables_locked(ctx, draw->dPriv, read->dPriv);
 489    dri_unlock(ctx);
 490
 491    dri1_propagate_drawable_change(ctx);
 492 }
 493
 494 static INLINE boolean
 495 dri1_intersect_src_bbox(struct drm_clip_rect *dst,
 496                         int dst_x,
 497                         int dst_y,
 498                         const struct drm_clip_rect *src,
 499                         const struct drm_clip_rect *bbox)
 500 {
 501    int xy1;
 502    int xy2;
 503
 504    xy1 = ((int)src->x1 > (int)bbox->x1 + dst_x) ? src->x1 :
 505       (int)bbox->x1 + dst_x;
 506    xy2 = ((int)src->x2 < (int)bbox->x2 + dst_x) ? src->x2 :
 507       (int)bbox->x2 + dst_x;
 508    if (xy1 >= xy2 || xy1 < 0)
 509       return FALSE;
 510
 511    dst->x1 = xy1;
 512    dst->x2 = xy2;
 513
 514    xy1 = ((int)src->y1 > (int)bbox->y1 + dst_y) ? src->y1 :
 515       (int)bbox->y1 + dst_y;
 516    xy2 = ((int)src->y2 < (int)bbox->y2 + dst_y) ? src->y2 :
 517       (int)bbox->y2 + dst_y;
 518    if (xy1 >= xy2 || xy1 < 0)
 519       return FALSE;
 520
 521    dst->y1 = xy1;
 522    dst->y2 = xy2;
 523    return TRUE;
 524 }
 525
 526 static void
 527 dri1_swap_copy(struct dri_context *ctx,
 528                struct pipe_surface *dst,
 529                struct pipe_surface *src,
 530                __DRIdrawablePrivate * dPriv, const struct drm_clip_rect *bbox)
 531 {
 532    struct pipe_context *pipe = ctx->pipe;
 533    struct drm_clip_rect clip;
 534    struct drm_clip_rect *cur;
 535    int i;
 536
 537    cur = dPriv->pClipRects;
 538
 539    for (i = 0; i < dPriv->numClipRects; ++i) {
 540       if (dri1_intersect_src_bbox(&clip, dPriv->x, dPriv->y, cur++, bbox))
 541          pipe->surface_copy(pipe, dst, clip.x1, clip.y1,
 542                             src,
 543                             (int)clip.x1 - dPriv->x,
 544                             (int)clip.y1 - dPriv->y,
 545                             clip.x2 - clip.x1, clip.y2 - clip.y1);
 546    }
 547 }
 548
 549 static void
 550 dri1_copy_to_front(struct dri_context *ctx,
 551                    struct pipe_surface *surf,
 552                    __DRIdrawablePrivate * dPriv,
 553                    const struct drm_clip_rect *sub_box,
 554                    struct pipe_fence_handle **fence)
 555 {
 556    struct pipe_context *pipe = ctx->pipe;
 557    boolean save_lost_lock;
 558    uint cur_w;
 559    uint cur_h;
 560    struct drm_clip_rect bbox;
 561    boolean visible = TRUE;
 562
 563    *fence = NULL;
 564
 565    dri_lock(ctx);
 566    save_lost_lock = ctx->stLostLock;
 567    dri1_update_drawables_locked(ctx, dPriv, dPriv);
 568    st_get_framebuffer_dimensions(dri_drawable(dPriv)->stfb, &cur_w, &cur_h);
 569
 570    bbox.x1 = 0;
 571    bbox.x2 = cur_w;
 572    bbox.y1 = 0;
 573    bbox.y2 = cur_h;
 574
 575    if (sub_box)
 576       visible = dri1_intersect_src_bbox(&bbox, 0, 0, &bbox, sub_box);
 577
 578    if (visible && __dri1_api_hooks->present_locked) {
 579
 580       __dri1_api_hooks->present_locked(pipe,
 581                                        surf,
 582                                        dPriv->pClipRects,
 583                                        dPriv->numClipRects,
 584                                        dPriv->x, dPriv->y, &bbox, fence);
 585
 586    } else if (visible && __dri1_api_hooks->front_srf_locked) {
 587
 588       struct pipe_surface *front = __dri1_api_hooks->front_srf_locked(pipe);
 589
 590       if (front)
 591          dri1_swap_copy(ctx, front, surf, dPriv, &bbox);
 592
 593       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, fence);
 594    }
 595
 596    ctx->stLostLock = save_lost_lock;
 597
 598    /**
 599     * FIXME: Revisit this: Update drawables on copy_sub_buffer ?
 600     */
 601
 602    if (!sub_box)
 603       dri1_update_drawables_locked(ctx, ctx->dPriv, ctx->rPriv);
 604
 605    dri_unlock(ctx);
 606    dri1_propagate_drawable_change(ctx);
 607 }
 608
 609 void
 610 dri1_flush_frontbuffer(struct pipe_screen *screen,
 611                        struct pipe_surface *surf, void *context_private)
 612 {
 613    struct dri_context *ctx = (struct dri_context *)context_private;
 614    struct pipe_fence_handle *dummy_fence;
 615
 616    dri1_copy_to_front(ctx, surf, ctx->dPriv, NULL, &dummy_fence);
 617    screen->fence_reference(screen, &dummy_fence, NULL);
 618
 619    /**
 620     * FIXME: Do we need swap throttling here?
 621     */
 622 }
 623
 624 void
 625 dri_swap_buffers(__DRIdrawablePrivate * dPriv)
 626 {
 627    struct dri_context *ctx;
 628    struct pipe_surface *back_surf;
 629    struct dri_drawable *draw = dri_drawable(dPriv);
 630    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 631    struct pipe_fence_handle *fence;
 632    struct st_context *st = st_get_current();
 633
 634    assert(__dri1_api_hooks != NULL);
 635
 636    if (!st)
 637       return;                          /* For now */
 638
 639    ctx = (struct dri_context *)st->pipe->priv;
 640
 641    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 642    if (back_surf) {
 643       st_notify_swapbuffers(draw->stfb);
 644       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 645       fence = dri_swap_fences_pop_front(draw);
 646       if (fence) {
 647          (void)screen->fence_finish(screen, fence, 0);
 648          screen->fence_reference(screen, &fence, NULL);
 649       }
 650       dri1_copy_to_front(ctx, back_surf, dPriv, NULL, &fence);
 651       dri_swap_fences_push_back(draw, fence);
 652       screen->fence_reference(screen, &fence, NULL);
 653    }
 654 }
 655
 656 void
 657 dri_copy_sub_buffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 658 {
 659    struct pipe_screen *screen = dri_screen(dPriv->driScreenPriv)->pipe_screen;
 660    struct drm_clip_rect sub_bbox;
 661    struct dri_context *ctx;
 662    struct pipe_surface *back_surf;
 663    struct dri_drawable *draw = dri_drawable(dPriv);
 664    struct pipe_fence_handle *dummy_fence;
 665    struct st_context *st = st_get_current();
 666
 667    assert(__dri1_api_hooks != NULL);
 668
 669    if (!st)
 670       return;
 671
 672    ctx = (struct dri_context *)st->pipe->priv;
 673
 674    sub_bbox.x1 = x;
 675    sub_bbox.x2 = x + w;
 676    sub_bbox.y1 = y;
 677    sub_bbox.y2 = y + h;
 678
 679    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 680    if (back_surf) {
 681       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 682       dri1_copy_to_front(ctx, back_surf, dPriv, &sub_bbox, &dummy_fence);
 683       screen->fence_reference(screen, &dummy_fence, NULL);
 684    }
 685 }
 686
 687 /* vim: set sw=3 ts=8 sts=3 expandtab: */