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