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