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