src/gallium/state_trackers/egl/x11/native_dri2.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.8
   4  *
   5  * Copyright (C) 2009-2010 Chia-I Wu <olv@0xlab.org>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "util/u_memory.h"
  27 #include "util/u_math.h"
  28 #include "util/u_format.h"
  29 #include "util/u_inlines.h"
  30 #include "util/u_hash_table.h"
  31 #include "pipe/p_compiler.h"
  32 #include "pipe/p_screen.h"
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_state.h"
  35 #include "state_tracker/drm_driver.h"
  36 #include "egllog.h"
  37
  38 #include "native_x11.h"
  39 #include "x11_screen.h"
  40
  41 #ifdef GLX_DIRECT_RENDERING
  42
  43 enum dri2_surface_type {
  44    DRI2_SURFACE_TYPE_WINDOW,
  45    DRI2_SURFACE_TYPE_PIXMAP,
  46 };
  47
  48 struct dri2_display {
  49    struct native_display base;
  50    Display *dpy;
  51    boolean own_dpy;
  52
  53    struct native_event_handler *event_handler;
  54
  55    struct x11_screen *xscr;
  56    int xscr_number;
  57    const char *dri_driver;
  58    int dri_major, dri_minor;
  59
  60    struct dri2_config *configs;
  61    int num_configs;
  62
  63    struct util_hash_table *surfaces;
  64 };
  65
  66 struct dri2_surface {
  67    struct native_surface base;
  68    Drawable drawable;
  69    enum dri2_surface_type type;
  70    enum pipe_format color_format;
  71    struct dri2_display *dri2dpy;
  72
  73    unsigned int server_stamp;
  74    unsigned int client_stamp;
  75    int width, height;
  76    struct pipe_resource *textures[NUM_NATIVE_ATTACHMENTS];
  77    uint valid_mask;
  78
  79    boolean have_back, have_fake;
  80
  81    struct x11_drawable_buffer *last_xbufs;
  82    int last_num_xbufs;
  83 };
  84
  85 struct dri2_config {
  86    struct native_config base;
  87 };
  88
  89 static INLINE struct dri2_display *
  90 dri2_display(const struct native_display *ndpy)
  91 {
  92    return (struct dri2_display *) ndpy;
  93 }
  94
  95 static INLINE struct dri2_surface *
  96 dri2_surface(const struct native_surface *nsurf)
  97 {
  98    return (struct dri2_surface *) nsurf;
  99 }
 100
 101 static INLINE struct dri2_config *
 102 dri2_config(const struct native_config *nconf)
 103 {
 104    return (struct dri2_config *) nconf;
 105 }
 106
 107 /**
 108  * Process the buffers returned by the server.
 109  */
 110 static void
 111 dri2_surface_process_drawable_buffers(struct native_surface *nsurf,
 112                                       struct x11_drawable_buffer *xbufs,
 113                                       int num_xbufs)
 114 {
 115    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 116    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 117    struct pipe_resource templ;
 118    struct winsys_handle whandle;
 119    uint valid_mask;
 120    int i;
 121
 122    /* free the old textures */
 123    for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++)
 124       pipe_resource_reference(&dri2surf->textures[i], NULL);
 125    dri2surf->valid_mask = 0x0;
 126
 127    dri2surf->have_back = FALSE;
 128    dri2surf->have_fake = FALSE;
 129
 130    if (!xbufs)
 131       return;
 132
 133    memset(&templ, 0, sizeof(templ));
 134    templ.target = PIPE_TEXTURE_2D;
 135    templ.last_level = 0;
 136    templ.width0 = dri2surf->width;
 137    templ.height0 = dri2surf->height;
 138    templ.depth0 = 1;
 139    templ.format = dri2surf->color_format;
 140    templ.bind = PIPE_BIND_RENDER_TARGET;
 141
 142    valid_mask = 0x0;
 143    for (i = 0; i < num_xbufs; i++) {
 144       struct x11_drawable_buffer *xbuf = &xbufs[i];
 145       const char *desc;
 146       enum native_attachment natt;
 147
 148       switch (xbuf->attachment) {
 149       case DRI2BufferFrontLeft:
 150          natt = NATIVE_ATTACHMENT_FRONT_LEFT;
 151          desc = "DRI2 Front Buffer";
 152          break;
 153       case DRI2BufferFakeFrontLeft:
 154          natt = NATIVE_ATTACHMENT_FRONT_LEFT;
 155          desc = "DRI2 Fake Front Buffer";
 156          dri2surf->have_fake = TRUE;
 157          break;
 158       case DRI2BufferBackLeft:
 159          natt = NATIVE_ATTACHMENT_BACK_LEFT;
 160          desc = "DRI2 Back Buffer";
 161          dri2surf->have_back = TRUE;
 162          break;
 163       default:
 164          desc = NULL;
 165          break;
 166       }
 167
 168       if (!desc || dri2surf->textures[natt]) {
 169          if (!desc)
 170             _eglLog(_EGL_WARNING, "unknown buffer %d", xbuf->attachment);
 171          else
 172             _eglLog(_EGL_WARNING, "both real and fake front buffers are listed");
 173          continue;
 174       }
 175
 176       memset(&whandle, 0, sizeof(whandle));
 177       whandle.stride = xbuf->pitch;
 178       whandle.handle = xbuf->name;
 179       dri2surf->textures[natt] = dri2dpy->base.screen->resource_from_handle(
 180          dri2dpy->base.screen, &templ, &whandle);
 181       if (dri2surf->textures[natt])
 182          valid_mask |= 1 << natt;
 183    }
 184
 185    dri2surf->valid_mask = valid_mask;
 186 }
 187
 188 /**
 189  * Get the buffers from the server.
 190  */
 191 static void
 192 dri2_surface_get_buffers(struct native_surface *nsurf, uint buffer_mask)
 193 {
 194    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 195    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 196    unsigned int dri2atts[NUM_NATIVE_ATTACHMENTS * 2];
 197    int num_ins, num_outs, att;
 198    struct x11_drawable_buffer *xbufs;
 199    uint bpp = util_format_get_blocksizebits(dri2surf->color_format);
 200    boolean with_format = FALSE; /* never ask for depth/stencil */
 201
 202    /* We must get the front on servers which doesn't support with format
 203     * due to a silly bug in core dri2. You can't copy to/from a buffer
 204     * that you haven't requested and you recive BadValue errors */
 205    if (dri2surf->dri2dpy->dri_minor < 1) {
 206       with_format = FALSE;
 207       buffer_mask |= (1 << NATIVE_ATTACHMENT_FRONT_LEFT);
 208    }
 209
 210    /* prepare the attachments */
 211    num_ins = 0;
 212    for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
 213       if (native_attachment_mask_test(buffer_mask, att)) {
 214          unsigned int dri2att;
 215
 216          switch (att) {
 217          case NATIVE_ATTACHMENT_FRONT_LEFT:
 218             dri2att = DRI2BufferFrontLeft;
 219             break;
 220          case NATIVE_ATTACHMENT_BACK_LEFT:
 221             dri2att = DRI2BufferBackLeft;
 222             break;
 223          case NATIVE_ATTACHMENT_FRONT_RIGHT:
 224             dri2att = DRI2BufferFrontRight;
 225             break;
 226          case NATIVE_ATTACHMENT_BACK_RIGHT:
 227             dri2att = DRI2BufferBackRight;
 228             break;
 229          default:
 230             assert(0);
 231             dri2att = 0;
 232             break;
 233          }
 234
 235          dri2atts[num_ins++] = dri2att;
 236          if (with_format)
 237             dri2atts[num_ins++] = bpp;
 238       }
 239    }
 240    if (with_format)
 241       num_ins /= 2;
 242
 243    xbufs = x11_drawable_get_buffers(dri2dpy->xscr, dri2surf->drawable,
 244                                     &dri2surf->width, &dri2surf->height,
 245                                     dri2atts, with_format, num_ins, &num_outs);
 246
 247    /* we should be able to do better... */
 248    if (xbufs && dri2surf->last_num_xbufs == num_outs &&
 249        memcmp(dri2surf->last_xbufs, xbufs, sizeof(*xbufs) * num_outs) == 0) {
 250       FREE(xbufs);
 251       dri2surf->client_stamp = dri2surf->server_stamp;
 252       return;
 253    }
 254
 255    dri2_surface_process_drawable_buffers(&dri2surf->base, xbufs, num_outs);
 256
 257    dri2surf->server_stamp++;
 258    dri2surf->client_stamp = dri2surf->server_stamp;
 259
 260    if (dri2surf->last_xbufs)
 261       FREE(dri2surf->last_xbufs);
 262    dri2surf->last_xbufs = xbufs;
 263    dri2surf->last_num_xbufs = num_outs;
 264 }
 265
 266 /**
 267  * Update the buffers of the surface.  This is a slow function due to the
 268  * round-trip to the server.
 269  */
 270 static boolean
 271 dri2_surface_update_buffers(struct native_surface *nsurf, uint buffer_mask)
 272 {
 273    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 274
 275    dri2_surface_get_buffers(&dri2surf->base, buffer_mask);
 276
 277    return ((dri2surf->valid_mask & buffer_mask) == buffer_mask);
 278 }
 279
 280 /**
 281  * Return TRUE if the surface receives DRI2_InvalidateBuffers events.
 282  */
 283 static INLINE boolean
 284 dri2_surface_receive_events(struct native_surface *nsurf)
 285 {
 286    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 287    return (dri2surf->dri2dpy->dri_minor >= 3);
 288 }
 289
 290 static boolean
 291 dri2_surface_flush_frontbuffer(struct native_surface *nsurf)
 292 {
 293    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 294    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 295
 296    /* copy to real front buffer */
 297    if (dri2surf->have_fake)
 298       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 299             0, 0, dri2surf->width, dri2surf->height,
 300             DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 301
 302    /* force buffers to be updated in next validation call */
 303    if (!dri2_surface_receive_events(&dri2surf->base)) {
 304       dri2surf->server_stamp++;
 305       dri2dpy->event_handler->invalid_surface(&dri2dpy->base,
 306             &dri2surf->base, dri2surf->server_stamp);
 307    }
 308
 309    return TRUE;
 310 }
 311
 312 static boolean
 313 dri2_surface_swap_buffers(struct native_surface *nsurf)
 314 {
 315    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 316    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 317
 318    /* copy to front buffer */
 319    if (dri2surf->have_back)
 320       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 321             0, 0, dri2surf->width, dri2surf->height,
 322             DRI2BufferBackLeft, DRI2BufferFrontLeft);
 323
 324    /* and update fake front buffer */
 325    if (dri2surf->have_fake)
 326       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 327             0, 0, dri2surf->width, dri2surf->height,
 328             DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 329
 330    /* force buffers to be updated in next validation call */
 331    if (!dri2_surface_receive_events(&dri2surf->base)) {
 332       dri2surf->server_stamp++;
 333       dri2dpy->event_handler->invalid_surface(&dri2dpy->base,
 334             &dri2surf->base, dri2surf->server_stamp);
 335    }
 336
 337    return TRUE;
 338 }
 339
 340 static boolean
 341 dri2_surface_present(struct native_surface *nsurf,
 342                      enum native_attachment natt,
 343                      boolean preserve,
 344                      uint swap_interval)
 345 {
 346    boolean ret;
 347
 348    if (swap_interval)
 349       return FALSE;
 350
 351    switch (natt) {
 352    case NATIVE_ATTACHMENT_FRONT_LEFT:
 353       ret = dri2_surface_flush_frontbuffer(nsurf);
 354       break;
 355    case NATIVE_ATTACHMENT_BACK_LEFT:
 356       ret = dri2_surface_swap_buffers(nsurf);
 357       break;
 358    default:
 359       ret = FALSE;
 360       break;
 361    }
 362
 363    return ret;
 364 }
 365
 366 static boolean
 367 dri2_surface_validate(struct native_surface *nsurf, uint attachment_mask,
 368                       unsigned int *seq_num, struct pipe_resource **textures,
 369                       int *width, int *height)
 370 {
 371    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 372
 373    if (dri2surf->server_stamp != dri2surf->client_stamp ||
 374        (dri2surf->valid_mask & attachment_mask) != attachment_mask) {
 375       if (!dri2_surface_update_buffers(&dri2surf->base, attachment_mask))
 376          return FALSE;
 377    }
 378
 379    if (seq_num)
 380       *seq_num = dri2surf->client_stamp;
 381
 382    if (textures) {
 383       int att;
 384       for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
 385          if (native_attachment_mask_test(attachment_mask, att)) {
 386             struct pipe_resource *ptex = dri2surf->textures[att];
 387
 388             textures[att] = NULL;
 389             pipe_resource_reference(&textures[att], ptex);
 390          }
 391       }
 392    }
 393
 394    if (width)
 395       *width = dri2surf->width;
 396    if (height)
 397       *height = dri2surf->height;
 398
 399    return TRUE;
 400 }
 401
 402 static void
 403 dri2_surface_wait(struct native_surface *nsurf)
 404 {
 405    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 406    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 407
 408    if (dri2surf->have_fake) {
 409       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 410             0, 0, dri2surf->width, dri2surf->height,
 411             DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 412    }
 413 }
 414
 415 static void
 416 dri2_surface_destroy(struct native_surface *nsurf)
 417 {
 418    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 419    int i;
 420
 421    if (dri2surf->last_xbufs)
 422       FREE(dri2surf->last_xbufs);
 423
 424    for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
 425       struct pipe_resource *ptex = dri2surf->textures[i];
 426       pipe_resource_reference(&ptex, NULL);
 427    }
 428
 429    if (dri2surf->drawable) {
 430       x11_drawable_enable_dri2(dri2surf->dri2dpy->xscr,
 431             dri2surf->drawable, FALSE);
 432
 433       util_hash_table_remove(dri2surf->dri2dpy->surfaces,
 434             (void *) dri2surf->drawable);
 435    }
 436    FREE(dri2surf);
 437 }
 438
 439 static struct dri2_surface *
 440 dri2_display_create_surface(struct native_display *ndpy,
 441                             enum dri2_surface_type type,
 442                             Drawable drawable,
 443                             const struct native_config *nconf)
 444 {
 445    struct dri2_display *dri2dpy = dri2_display(ndpy);
 446    struct dri2_config *dri2conf = dri2_config(nconf);
 447    struct dri2_surface *dri2surf;
 448
 449    dri2surf = CALLOC_STRUCT(dri2_surface);
 450    if (!dri2surf)
 451       return NULL;
 452
 453    dri2surf->dri2dpy = dri2dpy;
 454    dri2surf->type = type;
 455    dri2surf->drawable = drawable;
 456    dri2surf->color_format = dri2conf->base.color_format;
 457
 458    dri2surf->base.destroy = dri2_surface_destroy;
 459    dri2surf->base.swap_buffers = dri2_surface_swap_buffers;
 460    dri2surf->base.flush_frontbuffer = dri2_surface_flush_frontbuffer;
 461    dri2surf->base.present = dri2_surface_present;
 462    dri2surf->base.validate = dri2_surface_validate;
 463    dri2surf->base.wait = dri2_surface_wait;
 464
 465    if (drawable) {
 466       x11_drawable_enable_dri2(dri2dpy->xscr, drawable, TRUE);
 467       /* initialize the geometry */
 468       dri2_surface_update_buffers(&dri2surf->base, 0x0);
 469
 470       util_hash_table_set(dri2surf->dri2dpy->surfaces,
 471             (void *) dri2surf->drawable, (void *) &dri2surf->base);
 472    }
 473
 474    return dri2surf;
 475 }
 476
 477 static struct native_surface *
 478 dri2_display_create_window_surface(struct native_display *ndpy,
 479                                    EGLNativeWindowType win,
 480                                    const struct native_config *nconf)
 481 {
 482    struct dri2_surface *dri2surf;
 483
 484    dri2surf = dri2_display_create_surface(ndpy, DRI2_SURFACE_TYPE_WINDOW,
 485          (Drawable) win, nconf);
 486    return (dri2surf) ? &dri2surf->base : NULL;
 487 }
 488
 489 static struct native_surface *
 490 dri2_display_create_pixmap_surface(struct native_display *ndpy,
 491                                    EGLNativePixmapType pix,
 492                                    const struct native_config *nconf)
 493 {
 494    struct dri2_surface *dri2surf;
 495
 496    dri2surf = dri2_display_create_surface(ndpy, DRI2_SURFACE_TYPE_PIXMAP,
 497          (Drawable) pix, nconf);
 498    return (dri2surf) ? &dri2surf->base : NULL;
 499 }
 500
 501 static int
 502 choose_color_format(const __GLcontextModes *mode, enum pipe_format formats[32])
 503 {
 504    int count = 0;
 505
 506    switch (mode->rgbBits) {
 507    case 32:
 508       formats[count++] = PIPE_FORMAT_B8G8R8A8_UNORM;
 509       formats[count++] = PIPE_FORMAT_A8R8G8B8_UNORM;
 510       break;
 511    case 24:
 512       formats[count++] = PIPE_FORMAT_B8G8R8X8_UNORM;
 513       formats[count++] = PIPE_FORMAT_X8R8G8B8_UNORM;
 514       formats[count++] = PIPE_FORMAT_B8G8R8A8_UNORM;
 515       formats[count++] = PIPE_FORMAT_A8R8G8B8_UNORM;
 516       break;
 517    case 16:
 518       formats[count++] = PIPE_FORMAT_B5G6R5_UNORM;
 519       break;
 520    default:
 521       break;
 522    }
 523
 524    return count;
 525 }
 526
 527 static boolean
 528 is_format_supported(struct pipe_screen *screen,
 529                     enum pipe_format fmt, unsigned sample_count, boolean is_color)
 530 {
 531    return screen->is_format_supported(screen, fmt, PIPE_TEXTURE_2D, sample_count,
 532          (is_color) ? PIPE_BIND_RENDER_TARGET :
 533          PIPE_BIND_DEPTH_STENCIL, 0);
 534 }
 535
 536 static boolean
 537 dri2_display_convert_config(struct native_display *ndpy,
 538                             const __GLcontextModes *mode,
 539                             struct native_config *nconf)
 540 {
 541    enum pipe_format formats[32];
 542    int num_formats, i;
 543    int sample_count = 0;
 544
 545    if (!(mode->renderType & GLX_RGBA_BIT) || !mode->rgbMode)
 546       return FALSE;
 547
 548    /* only interested in native renderable configs */
 549    if (!mode->xRenderable || !mode->drawableType)
 550       return FALSE;
 551
 552    nconf->buffer_mask = 1 << NATIVE_ATTACHMENT_FRONT_LEFT;
 553    if (mode->doubleBufferMode)
 554       nconf->buffer_mask |= 1 << NATIVE_ATTACHMENT_BACK_LEFT;
 555    if (mode->stereoMode) {
 556       nconf->buffer_mask |= 1 << NATIVE_ATTACHMENT_FRONT_RIGHT;
 557       if (mode->doubleBufferMode)
 558          nconf->buffer_mask |= 1 << NATIVE_ATTACHMENT_BACK_RIGHT;
 559    }
 560
 561    /* choose color format */
 562    num_formats = choose_color_format(mode, formats);
 563    for (i = 0; i < num_formats; i++) {
 564       if (is_format_supported(ndpy->screen, formats[i], sample_count, TRUE)) {
 565          nconf->color_format = formats[i];
 566          break;
 567       }
 568    }
 569    if (nconf->color_format == PIPE_FORMAT_NONE)
 570       return FALSE;
 571
 572    if (mode->drawableType & GLX_WINDOW_BIT)
 573       nconf->window_bit = TRUE;
 574    if (mode->drawableType & GLX_PIXMAP_BIT)
 575       nconf->pixmap_bit = TRUE;
 576
 577    nconf->native_visual_id = mode->visualID;
 578    nconf->native_visual_type = mode->visualType;
 579    nconf->level = mode->level;
 580    nconf->samples = mode->samples;
 581
 582    nconf->slow_config = (mode->visualRating == GLX_SLOW_CONFIG);
 583
 584    if (mode->transparentPixel == GLX_TRANSPARENT_RGB) {
 585       nconf->transparent_rgb = TRUE;
 586       nconf->transparent_rgb_values[0] = mode->transparentRed;
 587       nconf->transparent_rgb_values[1] = mode->transparentGreen;
 588       nconf->transparent_rgb_values[2] = mode->transparentBlue;
 589    }
 590
 591    return TRUE;
 592 }
 593
 594 static const struct native_config **
 595 dri2_display_get_configs(struct native_display *ndpy, int *num_configs)
 596 {
 597    struct dri2_display *dri2dpy = dri2_display(ndpy);
 598    const struct native_config **configs;
 599    int i;
 600
 601    /* first time */
 602    if (!dri2dpy->configs) {
 603       const __GLcontextModes *modes;
 604       int num_modes, count;
 605
 606       modes = x11_screen_get_glx_configs(dri2dpy->xscr);
 607       if (!modes)
 608          return NULL;
 609       num_modes = x11_context_modes_count(modes);
 610
 611       dri2dpy->configs = CALLOC(num_modes, sizeof(*dri2dpy->configs));
 612       if (!dri2dpy->configs)
 613          return NULL;
 614
 615       count = 0;
 616       for (i = 0; i < num_modes; i++) {
 617          struct native_config *nconf = &dri2dpy->configs[count].base;
 618          if (dri2_display_convert_config(&dri2dpy->base, modes, nconf))
 619             count++;
 620          modes = modes->next;
 621       }
 622
 623       dri2dpy->num_configs = count;
 624    }
 625
 626    configs = MALLOC(dri2dpy->num_configs * sizeof(*configs));
 627    if (configs) {
 628       for (i = 0; i < dri2dpy->num_configs; i++)
 629          configs[i] = (const struct native_config *) &dri2dpy->configs[i];
 630       if (num_configs)
 631          *num_configs = dri2dpy->num_configs;
 632    }
 633
 634    return configs;
 635 }
 636
 637 static boolean
 638 dri2_display_is_pixmap_supported(struct native_display *ndpy,
 639                                  EGLNativePixmapType pix,
 640                                  const struct native_config *nconf)
 641 {
 642    struct dri2_display *dri2dpy = dri2_display(ndpy);
 643    uint depth, nconf_depth;
 644
 645    depth = x11_drawable_get_depth(dri2dpy->xscr, (Drawable) pix);
 646    nconf_depth = util_format_get_blocksizebits(nconf->color_format);
 647
 648    /* simple depth match for now */
 649    return (depth == nconf_depth || (depth == 24 && depth + 8 == nconf_depth));
 650 }
 651
 652 static int
 653 dri2_display_get_param(struct native_display *ndpy,
 654                        enum native_param_type param)
 655 {
 656    int val;
 657
 658    switch (param) {
 659    case NATIVE_PARAM_USE_NATIVE_BUFFER:
 660       /* DRI2GetBuffers uses the native buffers */
 661       val = TRUE;
 662       break;
 663    case NATIVE_PARAM_PRESERVE_BUFFER:
 664       /* DRI2CopyRegion is used */
 665       val = TRUE;
 666       break;
 667    case NATIVE_PARAM_MAX_SWAP_INTERVAL:
 668    default:
 669       val = 0;
 670       break;
 671    }
 672
 673    return val;
 674 }
 675
 676 static void
 677 dri2_display_destroy(struct native_display *ndpy)
 678 {
 679    struct dri2_display *dri2dpy = dri2_display(ndpy);
 680
 681    if (dri2dpy->configs)
 682       FREE(dri2dpy->configs);
 683
 684    if (dri2dpy->base.screen)
 685       dri2dpy->base.screen->destroy(dri2dpy->base.screen);
 686
 687    if (dri2dpy->surfaces)
 688       util_hash_table_destroy(dri2dpy->surfaces);
 689
 690    if (dri2dpy->xscr)
 691       x11_screen_destroy(dri2dpy->xscr);
 692    if (dri2dpy->own_dpy)
 693       XCloseDisplay(dri2dpy->dpy);
 694    FREE(dri2dpy);
 695 }
 696
 697 static void
 698 dri2_display_invalidate_buffers(struct x11_screen *xscr, Drawable drawable,
 699                                 void *user_data)
 700 {
 701    struct native_display *ndpy = (struct native_display* ) user_data;
 702    struct dri2_display *dri2dpy = dri2_display(ndpy);
 703    struct native_surface *nsurf;
 704    struct dri2_surface *dri2surf;
 705
 706    nsurf = (struct native_surface *)
 707       util_hash_table_get(dri2dpy->surfaces, (void *) drawable);
 708    if (!nsurf)
 709       return;
 710
 711    dri2surf = dri2_surface(nsurf);
 712
 713    dri2surf->server_stamp++;
 714    dri2dpy->event_handler->invalid_surface(&dri2dpy->base,
 715          &dri2surf->base, dri2surf->server_stamp);
 716 }
 717
 718 /**
 719  * Initialize DRI2 and pipe screen.
 720  */
 721 static boolean
 722 dri2_display_init_screen(struct native_display *ndpy)
 723 {
 724    struct dri2_display *dri2dpy = dri2_display(ndpy);
 725    int fd;
 726
 727    if (!x11_screen_support(dri2dpy->xscr, X11_SCREEN_EXTENSION_DRI2) ||
 728        !x11_screen_support(dri2dpy->xscr, X11_SCREEN_EXTENSION_GLX)) {
 729       _eglLog(_EGL_WARNING, "GLX/DRI2 is not supported");
 730       return FALSE;
 731    }
 732
 733    dri2dpy->dri_driver = x11_screen_probe_dri2(dri2dpy->xscr,
 734          &dri2dpy->dri_major, &dri2dpy->dri_minor);
 735
 736    fd = x11_screen_enable_dri2(dri2dpy->xscr,
 737          dri2_display_invalidate_buffers, &dri2dpy->base);
 738    if (fd < 0)
 739       return FALSE;
 740
 741    dri2dpy->base.screen =
 742       dri2dpy->event_handler->new_drm_screen(&dri2dpy->base,
 743             dri2dpy->dri_driver, fd);
 744    if (!dri2dpy->base.screen) {
 745       _eglLog(_EGL_WARNING, "failed to create DRM screen");
 746       return FALSE;
 747    }
 748
 749    return TRUE;
 750 }
 751
 752 static unsigned
 753 dri2_display_hash_table_hash(void *key)
 754 {
 755    XID drawable = pointer_to_uintptr(key);
 756    return (unsigned) drawable;
 757 }
 758
 759 static int
 760 dri2_display_hash_table_compare(void *key1, void *key2)
 761 {
 762    return (key1 - key2);
 763 }
 764
 765 struct native_display *
 766 x11_create_dri2_display(Display *dpy,
 767                         struct native_event_handler *event_handler,
 768                         void *user_data)
 769 {
 770    struct dri2_display *dri2dpy;
 771
 772    dri2dpy = CALLOC_STRUCT(dri2_display);
 773    if (!dri2dpy)
 774       return NULL;
 775
 776    dri2dpy->event_handler = event_handler;
 777    dri2dpy->base.user_data = user_data;
 778
 779    dri2dpy->dpy = dpy;
 780    if (!dri2dpy->dpy) {
 781       dri2dpy->dpy = XOpenDisplay(NULL);
 782       if (!dri2dpy->dpy) {
 783          dri2_display_destroy(&dri2dpy->base);
 784          return NULL;
 785       }
 786       dri2dpy->own_dpy = TRUE;
 787    }
 788
 789    dri2dpy->xscr_number = DefaultScreen(dri2dpy->dpy);
 790    dri2dpy->xscr = x11_screen_create(dri2dpy->dpy, dri2dpy->xscr_number);
 791    if (!dri2dpy->xscr) {
 792       dri2_display_destroy(&dri2dpy->base);
 793       return NULL;
 794    }
 795
 796    if (!dri2_display_init_screen(&dri2dpy->base)) {
 797       dri2_display_destroy(&dri2dpy->base);
 798       return NULL;
 799    }
 800
 801    dri2dpy->surfaces = util_hash_table_create(dri2_display_hash_table_hash,
 802          dri2_display_hash_table_compare);
 803    if (!dri2dpy->surfaces) {
 804       dri2_display_destroy(&dri2dpy->base);
 805       return NULL;
 806    }
 807
 808    dri2dpy->base.destroy = dri2_display_destroy;
 809    dri2dpy->base.get_param = dri2_display_get_param;
 810    dri2dpy->base.get_configs = dri2_display_get_configs;
 811    dri2dpy->base.is_pixmap_supported = dri2_display_is_pixmap_supported;
 812    dri2dpy->base.create_window_surface = dri2_display_create_window_surface;
 813    dri2dpy->base.create_pixmap_surface = dri2_display_create_pixmap_surface;
 814
 815    return &dri2dpy->base;
 816 }
 817
 818 #else /* GLX_DIRECT_RENDERING */
 819
 820 struct native_display *
 821 x11_create_dri2_display(Display *dpy,
 822                         struct native_event_handler *event_handler,
 823                         void *user_data)
 824 {
 825    return NULL;
 826 }
 827
 828 #endif /* GLX_DIRECT_RENDERING */