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
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  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
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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  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    struct pipe_buffer *buf = NULL;
  60
  61    buf = api->buffer_from_handle(api, screen, "dri2 buffer", handle);
  62    if (!buf) {
  63       debug_printf("%s: Failed to get buffer from handle\n", __func__);
  64       return NULL;
  65    }
  66
  67    memset(&templat, 0, sizeof(templat));
  68    templat.tex_usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
  69    templat.target = PIPE_TEXTURE_2D;
  70    templat.last_level = 0;
  71    templat.depth[0] = 1;
  72    templat.format = format;
  73    templat.width[0] = width;
  74    templat.height[0] = height;
  75    pf_get_block(templat.format, &templat.block);
  76
  77    texture = screen->texture_blanket(screen, &templat, &pitch, buf);
  78
  79    /* we don't need the buffer from this point on */
  80    pipe_buffer_reference(&buf, NULL);
  81
  82    if (!texture) {
  83       debug_printf("%s: Failed to blanket the buffer with a texture\n", __func__);
  84       return NULL;
  85    }
  86
  87    surface = screen->get_tex_surface(screen, texture, 0, 0, 0,
  88                                      PIPE_BUFFER_USAGE_GPU_READ |
  89                                      PIPE_BUFFER_USAGE_GPU_WRITE);
  90
  91    /* we don't need the texture from this point on */
  92    pipe_texture_reference(&texture, NULL);
  93    return surface;
  94 }
  95
  96 /**
  97  * Pixmaps have will have the same name of fake front and front.
  98  */
  99 static boolean
 100 dri2_check_if_pixmap(__DRIbuffer *buffers, int count)
 101 {
 102    boolean found = FALSE;
 103    boolean is_pixmap = FALSE;
 104    unsigned name;
 105    int i;
 106
 107    for (i = 0; i < count; i++) {
 108       switch (buffers[i].attachment) {
 109       case __DRI_BUFFER_FRONT_LEFT:
 110       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 111          if (found) {
 112             is_pixmap = buffers[i].name == name;
 113          } else {
 114             name = buffers[i].name;
 115             found = TRUE;
 116          }
 117       default:
 118          continue;
 119       }
 120    }
 121
 122    return is_pixmap;
 123 }
 124
 125 /**
 126  * This will be called a drawable is known to have been resized.
 127  */
 128 void
 129 dri_get_buffers(__DRIdrawablePrivate * dPriv)
 130 {
 131
 132    struct dri_drawable *drawable = dri_drawable(dPriv);
 133    struct pipe_surface *surface = NULL;
 134    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 135    __DRIbuffer *buffers = NULL;
 136    __DRIscreen *dri_screen = drawable->sPriv;
 137    __DRIdrawable *dri_drawable = drawable->dPriv;
 138    struct drm_api *api = ((struct dri_screen*)(dri_screen->private))->api;
 139    boolean have_depth = FALSE;
 140    int i, count;
 141
 142    buffers = (*dri_screen->dri2.loader->getBuffers) (dri_drawable,
 143                                                      &dri_drawable->w,
 144                                                      &dri_drawable->h,
 145                                                      drawable->attachments,
 146                                                      drawable->
 147                                                      num_attachments, &count,
 148                                                      dri_drawable->
 149                                                      loaderPrivate);
 150
 151    if (buffers == NULL) {
 152       return;
 153    }
 154
 155    /* set one cliprect to cover the whole dri_drawable */
 156    dri_drawable->x = 0;
 157    dri_drawable->y = 0;
 158    dri_drawable->backX = 0;
 159    dri_drawable->backY = 0;
 160    dri_drawable->numClipRects = 1;
 161    dri_drawable->pClipRects[0].x1 = 0;
 162    dri_drawable->pClipRects[0].y1 = 0;
 163    dri_drawable->pClipRects[0].x2 = dri_drawable->w;
 164    dri_drawable->pClipRects[0].y2 = dri_drawable->h;
 165    dri_drawable->numBackClipRects = 1;
 166    dri_drawable->pBackClipRects[0].x1 = 0;
 167    dri_drawable->pBackClipRects[0].y1 = 0;
 168    dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
 169    dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 170
 171    if (drawable->old_num == count &&
 172        drawable->old_w == dri_drawable->w &&
 173        drawable->old_h == dri_drawable->h &&
 174        memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0) {
 175        return;
 176    } else {
 177       drawable->old_num = count;
 178       drawable->old_w = dri_drawable->w;
 179       drawable->old_h = dri_drawable->h;
 180       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
 181    }
 182
 183    drawable->is_pixmap = dri2_check_if_pixmap(buffers, count);
 184
 185    for (i = 0; i < count; i++) {
 186       enum pipe_format format = 0;
 187       int index = 0;
 188
 189       switch (buffers[i].attachment) {
 190       case __DRI_BUFFER_FRONT_LEFT:
 191          continue;
 192       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 193          index = ST_SURFACE_FRONT_LEFT;
 194          format = drawable->color_format;
 195          break;
 196       case __DRI_BUFFER_BACK_LEFT:
 197          index = ST_SURFACE_BACK_LEFT;
 198          format = drawable->color_format;
 199          break;
 200       case __DRI_BUFFER_DEPTH:
 201          index = ST_SURFACE_DEPTH;
 202          format = drawable->depth_format;
 203          break;
 204       case __DRI_BUFFER_STENCIL:
 205          index = ST_SURFACE_DEPTH;
 206          format = drawable->stencil_format;
 207          break;
 208       case __DRI_BUFFER_ACCUM:
 209       default:
 210          assert(0);
 211       }
 212
 213       if (index == ST_SURFACE_DEPTH) {
 214          if (have_depth)
 215             continue;
 216          else
 217             have_depth = TRUE;
 218       }
 219
 220       surface = dri_surface_from_handle(api,
 221                                         screen,
 222                                         buffers[i].name,
 223                                         format,
 224                                         dri_drawable->w,
 225                                         dri_drawable->h, buffers[i].pitch);
 226
 227       st_set_framebuffer_surface(drawable->stfb, index, surface);
 228       pipe_surface_reference(&surface, NULL);
 229    }
 230    /* this needed, or else the state tracker fails to pick the new buffers */
 231    st_resize_framebuffer(drawable->stfb, dri_drawable->w, dri_drawable->h);
 232 }
 233
 234 /**
 235  * These are used for GLX_EXT_texture_from_pixmap
 236  */
 237 void dri2_set_tex_buffer2(__DRIcontext *pDRICtx, GLint target,
 238                           GLint format, __DRIdrawable *dPriv)
 239 {
 240    struct dri_drawable *drawable = dri_drawable(dPriv);
 241    struct pipe_surface *ps;
 242
 243    if (!drawable->stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer) {
 244       struct gl_renderbuffer *rb =
 245          st_new_renderbuffer_fb(drawable->color_format, 0 /*XXX*/, FALSE);
 246       _mesa_add_renderbuffer(&drawable->stfb->Base, BUFFER_FRONT_LEFT, rb);
 247    }
 248
 249    dri_get_buffers(drawable->dPriv);
 250    st_get_framebuffer_surface(drawable->stfb, ST_SURFACE_FRONT_LEFT, &ps);
 251
 252    st_bind_texture_surface(ps, target == GL_TEXTURE_2D ? ST_TEXTURE_2D :
 253                            ST_TEXTURE_RECT, 0,
 254                            format == GLX_TEXTURE_FORMAT_RGBA_EXT ?
 255                            PIPE_FORMAT_R8G8B8A8_UNORM : PIPE_FORMAT_R8G8B8X8_UNORM);
 256 }
 257
 258 void dri2_set_tex_buffer(__DRIcontext *pDRICtx, GLint target,
 259                          __DRIdrawable *dPriv)
 260 {
 261    dri2_set_tex_buffer2(pDRICtx, target, GLX_TEXTURE_FORMAT_RGBA_EXT, dPriv);
 262 }
 263
 264 void
 265 dri_flush_frontbuffer(struct pipe_screen *screen,
 266                       struct pipe_surface *surf, void *context_private)
 267 {
 268    struct dri_context *ctx = (struct dri_context *)context_private;
 269    struct dri_drawable *drawable = dri_drawable(ctx->dPriv);
 270    __DRIdrawable *dri_drawable = ctx->dPriv;
 271    __DRIscreen *dri_screen = ctx->sPriv;
 272
 273    /* XXX Does this function get called with DRI1? */
 274
 275    if (ctx->dPriv == NULL) {
 276       debug_printf("%s: no drawable bound to context\n", __func__);
 277       return;
 278    }
 279
 280 #if 0
 281    /* TODO if rendering to pixmaps is slow enable this code. */
 282    if (drawable->is_pixmap)
 283       return;
 284 #else
 285    (void)drawable;
 286 #endif
 287
 288    (*dri_screen->dri2.loader->flushFrontBuffer)(dri_drawable,
 289                                                 dri_drawable->loaderPrivate);
 290 }
 291
 292 /**
 293  * This is called when we need to set up GL rendering to a new X window.
 294  */
 295 boolean
 296 dri_create_buffer(__DRIscreenPrivate * sPriv,
 297                   __DRIdrawablePrivate * dPriv,
 298                   const __GLcontextModes * visual, boolean isPixmap)
 299 {
 300    struct dri_screen *screen = sPriv->private;
 301    struct dri_drawable *drawable = NULL;
 302    int i;
 303
 304    if (isPixmap)
 305       goto fail;                       /* not implemented */
 306
 307    drawable = CALLOC_STRUCT(dri_drawable);
 308    if (drawable == NULL)
 309       goto fail;
 310
 311    if (visual->redBits == 8) {
 312       if (visual->alphaBits == 8)
 313          drawable->color_format = PIPE_FORMAT_A8R8G8B8_UNORM;
 314       else
 315          drawable->color_format = PIPE_FORMAT_X8R8G8B8_UNORM;
 316    } else {
 317       drawable->color_format = PIPE_FORMAT_R5G6B5_UNORM;
 318    }
 319
 320    switch(visual->depthBits) {
 321    default:
 322    case 0:
 323       drawable->depth_format = PIPE_FORMAT_NONE;
 324       break;
 325    case 16:
 326       drawable->depth_format = PIPE_FORMAT_Z16_UNORM;
 327       break;
 328    case 24:
 329       if (visual->stencilBits == 0) {
 330          drawable->depth_format = (screen->d_depth_bits_last) ?
 331             PIPE_FORMAT_X8Z24_UNORM:
 332             PIPE_FORMAT_Z24X8_UNORM;
 333       } else {
 334          drawable->depth_format = (screen->sd_depth_bits_last) ?
 335             PIPE_FORMAT_S8Z24_UNORM:
 336             PIPE_FORMAT_Z24S8_UNORM;
 337       }
 338       break;
 339    case 32:
 340       drawable->depth_format = PIPE_FORMAT_Z32_UNORM;
 341       break;
 342    }
 343
 344    switch(visual->stencilBits) {
 345    default:
 346    case 0:
 347       drawable->stencil_format = PIPE_FORMAT_NONE;
 348       break;
 349    case 8:
 350       drawable->stencil_format = (screen->sd_depth_bits_last) ?
 351          PIPE_FORMAT_S8Z24_UNORM:
 352          PIPE_FORMAT_Z24S8_UNORM;
 353       break;
 354    }
 355
 356    drawable->stfb = st_create_framebuffer(visual,
 357                                           drawable->color_format,
 358                                           drawable->depth_format,
 359                                           drawable->stencil_format,
 360                                           dPriv->w,
 361                                           dPriv->h, (void *)drawable);
 362    if (drawable->stfb == NULL)
 363       goto fail;
 364
 365    drawable->sPriv = sPriv;
 366    drawable->dPriv = dPriv;
 367    dPriv->driverPrivate = (void *)drawable;
 368
 369    /* setup dri2 buffers information */
 370    /* TODO incase of double buffer visual, delay fake creation */
 371    i = 0;
 372    drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 373
 374    if (visual->doubleBufferMode)
 375       drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 376    else
 377       drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
 378    if (visual->depthBits)
 379       drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
 380    if (visual->stencilBits)
 381       drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
 382    drawable->num_attachments = i;
 383
 384    drawable->desired_fences = 2;
 385
 386    return GL_TRUE;
 387  fail:
 388    FREE(drawable);
 389    return GL_FALSE;
 390 }
 391
 392 static struct pipe_fence_handle *
 393 dri_swap_fences_pop_front(struct dri_drawable *draw)
 394 {
 395    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 396    struct pipe_fence_handle *fence = NULL;
 397
 398    if (draw->cur_fences >= draw->desired_fences) {
 399       screen->fence_reference(screen, &fence, draw->swap_fences[draw->tail]);
 400       screen->fence_reference(screen, &draw->swap_fences[draw->tail++], NULL);
 401       --draw->cur_fences;
 402       draw->tail &= DRI_SWAP_FENCES_MASK;
 403    }
 404    return fence;
 405 }
 406
 407 static void
 408 dri_swap_fences_push_back(struct dri_drawable *draw,
 409                           struct pipe_fence_handle *fence)
 410 {
 411    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 412
 413    if (!fence)
 414       return;
 415
 416    if (draw->cur_fences < DRI_SWAP_FENCES_MAX) {
 417       draw->cur_fences++;
 418       screen->fence_reference(screen, &draw->swap_fences[draw->head++],
 419                               fence);
 420       draw->head &= DRI_SWAP_FENCES_MASK;
 421    }
 422 }
 423
 424 void
 425 dri_destroy_buffer(__DRIdrawablePrivate * dPriv)
 426 {
 427    struct dri_drawable *drawable = dri_drawable(dPriv);
 428    struct pipe_fence_handle *fence;
 429    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
 430
 431    st_unreference_framebuffer(drawable->stfb);
 432    drawable->desired_fences = 0;
 433    while (drawable->cur_fences) {
 434       fence = dri_swap_fences_pop_front(drawable);
 435       screen->fence_reference(screen, &fence, NULL);
 436    }
 437
 438    FREE(drawable);
 439 }
 440
 441 static void
 442 dri1_update_drawables_locked(struct dri_context *ctx,
 443                              __DRIdrawablePrivate * driDrawPriv,
 444                              __DRIdrawablePrivate * driReadPriv)
 445 {
 446    if (ctx->stLostLock) {
 447       ctx->stLostLock = FALSE;
 448       if (driDrawPriv == driReadPriv)
 449          DRI_VALIDATE_DRAWABLE_INFO(ctx->sPriv, driDrawPriv);
 450       else
 451          DRI_VALIDATE_TWO_DRAWABLES_INFO(ctx->sPriv, driDrawPriv,
 452                                          driReadPriv);
 453    }
 454 }
 455
 456 /**
 457  * This ensures all contexts which bind to a drawable pick up the
 458  * drawable change and signal new buffer state.
 459  * Calling st_resize_framebuffer for each context may seem like overkill,
 460  * but no new buffers will actually be allocated if the dimensions don't
 461  * change.
 462  */
 463
 464 static void
 465 dri1_propagate_drawable_change(struct dri_context *ctx)
 466 {
 467    __DRIdrawablePrivate *dPriv = ctx->dPriv;
 468    __DRIdrawablePrivate *rPriv = ctx->rPriv;
 469    boolean flushed = FALSE;
 470
 471    if (dPriv && ctx->d_stamp != dPriv->lastStamp) {
 472
 473       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 474       flushed = TRUE;
 475       ctx->d_stamp = dPriv->lastStamp;
 476       st_resize_framebuffer(dri_drawable(dPriv)->stfb, dPriv->w, dPriv->h);
 477
 478    }
 479
 480    if (rPriv && dPriv != rPriv && ctx->r_stamp != rPriv->lastStamp) {
 481
 482       if (!flushed)
 483          st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 484       ctx->r_stamp = rPriv->lastStamp;
 485       st_resize_framebuffer(dri_drawable(rPriv)->stfb, rPriv->w, rPriv->h);
 486
 487    } else if (rPriv && dPriv == rPriv) {
 488
 489       ctx->r_stamp = ctx->d_stamp;
 490
 491    }
 492 }
 493
 494 void
 495 dri1_update_drawables(struct dri_context *ctx,
 496                       struct dri_drawable *draw, struct dri_drawable *read)
 497 {
 498    dri_lock(ctx);
 499    dri1_update_drawables_locked(ctx, draw->dPriv, read->dPriv);
 500    dri_unlock(ctx);
 501
 502    dri1_propagate_drawable_change(ctx);
 503 }
 504
 505 static INLINE boolean
 506 dri1_intersect_src_bbox(struct drm_clip_rect *dst,
 507                         int dst_x,
 508                         int dst_y,
 509                         const struct drm_clip_rect *src,
 510                         const struct drm_clip_rect *bbox)
 511 {
 512    int xy1;
 513    int xy2;
 514
 515    xy1 = ((int)src->x1 > (int)bbox->x1 + dst_x) ? src->x1 :
 516       (int)bbox->x1 + dst_x;
 517    xy2 = ((int)src->x2 < (int)bbox->x2 + dst_x) ? src->x2 :
 518       (int)bbox->x2 + dst_x;
 519    if (xy1 >= xy2 || xy1 < 0)
 520       return FALSE;
 521
 522    dst->x1 = xy1;
 523    dst->x2 = xy2;
 524
 525    xy1 = ((int)src->y1 > (int)bbox->y1 + dst_y) ? src->y1 :
 526       (int)bbox->y1 + dst_y;
 527    xy2 = ((int)src->y2 < (int)bbox->y2 + dst_y) ? src->y2 :
 528       (int)bbox->y2 + dst_y;
 529    if (xy1 >= xy2 || xy1 < 0)
 530       return FALSE;
 531
 532    dst->y1 = xy1;
 533    dst->y2 = xy2;
 534    return TRUE;
 535 }
 536
 537 static void
 538 dri1_swap_copy(struct dri_context *ctx,
 539                struct pipe_surface *dst,
 540                struct pipe_surface *src,
 541                __DRIdrawablePrivate * dPriv, const struct drm_clip_rect *bbox)
 542 {
 543    struct pipe_context *pipe = ctx->pipe;
 544    struct drm_clip_rect clip;
 545    struct drm_clip_rect *cur;
 546    int i;
 547
 548    cur = dPriv->pClipRects;
 549
 550    for (i = 0; i < dPriv->numClipRects; ++i) {
 551       if (dri1_intersect_src_bbox(&clip, dPriv->x, dPriv->y, cur++, bbox))
 552          pipe->surface_copy(pipe, dst, clip.x1, clip.y1,
 553                             src,
 554                             (int)clip.x1 - dPriv->x,
 555                             (int)clip.y1 - dPriv->y,
 556                             clip.x2 - clip.x1, clip.y2 - clip.y1);
 557    }
 558 }
 559
 560 static void
 561 dri1_copy_to_front(struct dri_context *ctx,
 562                    struct pipe_surface *surf,
 563                    __DRIdrawablePrivate * dPriv,
 564                    const struct drm_clip_rect *sub_box,
 565                    struct pipe_fence_handle **fence)
 566 {
 567    struct pipe_context *pipe = ctx->pipe;
 568    boolean save_lost_lock;
 569    uint cur_w;
 570    uint cur_h;
 571    struct drm_clip_rect bbox;
 572    boolean visible = TRUE;
 573
 574    *fence = NULL;
 575
 576    dri_lock(ctx);
 577    save_lost_lock = ctx->stLostLock;
 578    dri1_update_drawables_locked(ctx, dPriv, dPriv);
 579    st_get_framebuffer_dimensions(dri_drawable(dPriv)->stfb, &cur_w, &cur_h);
 580
 581    bbox.x1 = 0;
 582    bbox.x2 = cur_w;
 583    bbox.y1 = 0;
 584    bbox.y2 = cur_h;
 585
 586    if (sub_box)
 587       visible = dri1_intersect_src_bbox(&bbox, 0, 0, &bbox, sub_box);
 588
 589    if (visible && __dri1_api_hooks->present_locked) {
 590
 591       __dri1_api_hooks->present_locked(pipe,
 592                                        surf,
 593                                        dPriv->pClipRects,
 594                                        dPriv->numClipRects,
 595                                        dPriv->x, dPriv->y, &bbox, fence);
 596
 597    } else if (visible && __dri1_api_hooks->front_srf_locked) {
 598
 599       struct pipe_surface *front = __dri1_api_hooks->front_srf_locked(pipe);
 600
 601       if (front)
 602          dri1_swap_copy(ctx, front, surf, dPriv, &bbox);
 603
 604       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, fence);
 605    }
 606
 607    ctx->stLostLock = save_lost_lock;
 608
 609    /**
 610     * FIXME: Revisit this: Update drawables on copy_sub_buffer ?
 611     */
 612
 613    if (!sub_box)
 614       dri1_update_drawables_locked(ctx, ctx->dPriv, ctx->rPriv);
 615
 616    dri_unlock(ctx);
 617    dri1_propagate_drawable_change(ctx);
 618 }
 619
 620 void
 621 dri1_flush_frontbuffer(struct pipe_screen *screen,
 622                        struct pipe_surface *surf, void *context_private)
 623 {
 624    struct dri_context *ctx = (struct dri_context *)context_private;
 625    struct pipe_fence_handle *dummy_fence;
 626
 627    dri1_copy_to_front(ctx, surf, ctx->dPriv, NULL, &dummy_fence);
 628    screen->fence_reference(screen, &dummy_fence, NULL);
 629
 630    /**
 631     * FIXME: Do we need swap throttling here?
 632     */
 633 }
 634
 635 void
 636 dri_swap_buffers(__DRIdrawablePrivate * dPriv)
 637 {
 638    struct dri_context *ctx;
 639    struct pipe_surface *back_surf;
 640    struct dri_drawable *draw = dri_drawable(dPriv);
 641    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
 642    struct pipe_fence_handle *fence;
 643    struct st_context *st = st_get_current();
 644
 645    assert(__dri1_api_hooks != NULL);
 646
 647    if (!st)
 648       return;                          /* For now */
 649
 650    ctx = (struct dri_context *)st->pipe->priv;
 651
 652    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 653    if (back_surf) {
 654       st_notify_swapbuffers(draw->stfb);
 655       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 656       fence = dri_swap_fences_pop_front(draw);
 657       if (fence) {
 658          (void)screen->fence_finish(screen, fence, 0);
 659          screen->fence_reference(screen, &fence, NULL);
 660       }
 661       dri1_copy_to_front(ctx, back_surf, dPriv, NULL, &fence);
 662       dri_swap_fences_push_back(draw, fence);
 663       screen->fence_reference(screen, &fence, NULL);
 664    }
 665 }
 666
 667 void
 668 dri_copy_sub_buffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 669 {
 670    struct pipe_screen *screen = dri_screen(dPriv->driScreenPriv)->pipe_screen;
 671    struct drm_clip_rect sub_bbox;
 672    struct dri_context *ctx;
 673    struct pipe_surface *back_surf;
 674    struct dri_drawable *draw = dri_drawable(dPriv);
 675    struct pipe_fence_handle *dummy_fence;
 676    struct st_context *st = st_get_current();
 677
 678    assert(__dri1_api_hooks != NULL);
 679
 680    if (!st)
 681       return;
 682
 683    ctx = (struct dri_context *)st->pipe->priv;
 684
 685    sub_bbox.x1 = x;
 686    sub_bbox.x2 = x + w;
 687    sub_bbox.y1 = y;
 688    sub_bbox.y2 = y + h;
 689
 690    st_get_framebuffer_surface(draw->stfb, ST_SURFACE_BACK_LEFT, &back_surf);
 691    if (back_surf) {
 692       st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 693       dri1_copy_to_front(ctx, back_surf, dPriv, &sub_bbox, &dummy_fence);
 694       screen->fence_reference(screen, &dummy_fence, NULL);
 695    }
 696 }
 697
 698 /* vim: set sw=3 ts=8 sts=3 expandtab: */