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
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "util/u_memory.h"
  26 #include "util/u_math.h"
  27 #include "util/u_format.h"
  28 #include "util/u_inlines.h"
  29 #include "util/u_hash_table.h"
  30 #include "pipe/p_compiler.h"
  31 #include "pipe/p_screen.h"
  32 #include "pipe/p_context.h"
  33 #include "pipe/p_state.h"
  34 #include "state_tracker/drm_api.h"
  35 #include "egllog.h"
  36
  37 #include "native_x11.h"
  38 #include "x11_screen.h"
  39
  40 enum dri2_surface_type {
  41    DRI2_SURFACE_TYPE_WINDOW,
  42    DRI2_SURFACE_TYPE_PIXMAP,
  43    DRI2_SURFACE_TYPE_PBUFFER
  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_texture *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_texture 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_texture_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.tex_usage = PIPE_TEXTURE_USAGE_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->texture_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];
 196    int num_ins, num_outs, att;
 197    struct x11_drawable_buffer *xbufs;
 198
 199    /* prepare the attachments */
 200    num_ins = 0;
 201    for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
 202       if (native_attachment_mask_test(buffer_mask, att)) {
 203          unsigned int dri2att;
 204
 205          switch (att) {
 206          case NATIVE_ATTACHMENT_FRONT_LEFT:
 207             dri2att = DRI2BufferFrontLeft;
 208             break;
 209          case NATIVE_ATTACHMENT_BACK_LEFT:
 210             dri2att = DRI2BufferBackLeft;
 211             break;
 212          case NATIVE_ATTACHMENT_FRONT_RIGHT:
 213             dri2att = DRI2BufferFrontRight;
 214             break;
 215          case NATIVE_ATTACHMENT_BACK_RIGHT:
 216             dri2att = DRI2BufferBackRight;
 217             break;
 218          default:
 219             assert(0);
 220             dri2att = 0;
 221             break;
 222          }
 223
 224          dri2atts[num_ins] = dri2att;
 225          num_ins++;
 226       }
 227    }
 228
 229    xbufs = x11_drawable_get_buffers(dri2dpy->xscr, dri2surf->drawable,
 230                                     &dri2surf->width, &dri2surf->height,
 231                                     dri2atts, FALSE, num_ins, &num_outs);
 232
 233    /* we should be able to do better... */
 234    if (xbufs && dri2surf->last_num_xbufs == num_outs &&
 235        memcmp(dri2surf->last_xbufs, xbufs, sizeof(*xbufs) * num_outs) == 0) {
 236       free(xbufs);
 237       dri2surf->client_stamp = dri2surf->server_stamp;
 238       return;
 239    }
 240
 241    dri2_surface_process_drawable_buffers(&dri2surf->base, xbufs, num_outs);
 242
 243    dri2surf->server_stamp++;
 244    dri2surf->client_stamp = dri2surf->server_stamp;
 245
 246    if (dri2surf->last_xbufs)
 247       free(dri2surf->last_xbufs);
 248    dri2surf->last_xbufs = xbufs;
 249    dri2surf->last_num_xbufs = num_outs;
 250 }
 251
 252 /**
 253  * Update the buffers of the surface.  This is a slow function due to the
 254  * round-trip to the server.
 255  */
 256 static boolean
 257 dri2_surface_update_buffers(struct native_surface *nsurf, uint buffer_mask)
 258 {
 259    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 260    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 261
 262    /* create textures for pbuffer */
 263    if (dri2surf->type == DRI2_SURFACE_TYPE_PBUFFER) {
 264       struct pipe_screen *screen = dri2dpy->base.screen;
 265       struct pipe_texture templ;
 266       uint new_valid = 0x0;
 267       int att;
 268
 269       buffer_mask &= ~dri2surf->valid_mask;
 270       if (!buffer_mask)
 271          return TRUE;
 272
 273       memset(&templ, 0, sizeof(templ));
 274       templ.target = PIPE_TEXTURE_2D;
 275       templ.last_level = 0;
 276       templ.width0 = dri2surf->width;
 277       templ.height0 = dri2surf->height;
 278       templ.depth0 = 1;
 279       templ.format = dri2surf->color_format;
 280       templ.tex_usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
 281
 282       for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
 283          if (native_attachment_mask_test(buffer_mask, att)) {
 284             assert(!dri2surf->textures[att]);
 285
 286             dri2surf->textures[att] = screen->texture_create(screen, &templ);
 287             if (!dri2surf->textures[att])
 288                break;
 289
 290             new_valid |= 1 << att;
 291             if (new_valid == buffer_mask)
 292                break;
 293          }
 294       }
 295       dri2surf->valid_mask |= new_valid;
 296       /* no need to update the stamps */
 297    }
 298    else {
 299       dri2_surface_get_buffers(&dri2surf->base, buffer_mask);
 300    }
 301
 302    return ((dri2surf->valid_mask & buffer_mask) == buffer_mask);
 303 }
 304
 305 /**
 306  * Return TRUE if the surface receives DRI2_InvalidateBuffers events.
 307  */
 308 static INLINE boolean
 309 dri2_surface_receive_events(struct native_surface *nsurf)
 310 {
 311    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 312    return (dri2surf->dri2dpy->dri_minor >= 3);
 313 }
 314
 315 static boolean
 316 dri2_surface_flush_frontbuffer(struct native_surface *nsurf)
 317 {
 318    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 319    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 320
 321    /* pbuffer is private */
 322    if (dri2surf->type == DRI2_SURFACE_TYPE_PBUFFER)
 323       return TRUE;
 324
 325    /* copy to real front buffer */
 326    if (dri2surf->have_fake)
 327       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 328             0, 0, dri2surf->width, dri2surf->height,
 329             DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 330
 331    /* force buffers to be updated in next validation call */
 332    if (!dri2_surface_receive_events(&dri2surf->base)) {
 333       dri2surf->server_stamp++;
 334       dri2dpy->event_handler->invalid_surface(&dri2dpy->base,
 335             &dri2surf->base, dri2surf->server_stamp);
 336    }
 337
 338    return TRUE;
 339 }
 340
 341 static boolean
 342 dri2_surface_swap_buffers(struct native_surface *nsurf)
 343 {
 344    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 345    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 346
 347    /* pbuffer is private */
 348    if (dri2surf->type == DRI2_SURFACE_TYPE_PBUFFER)
 349       return TRUE;
 350
 351    /* copy to front buffer */
 352    if (dri2surf->have_back)
 353       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 354             0, 0, dri2surf->width, dri2surf->height,
 355             DRI2BufferBackLeft, DRI2BufferFrontLeft);
 356
 357    /* and update fake front buffer */
 358    if (dri2surf->have_fake)
 359       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 360             0, 0, dri2surf->width, dri2surf->height,
 361             DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 362
 363    /* force buffers to be updated in next validation call */
 364    if (!dri2_surface_receive_events(&dri2surf->base)) {
 365       dri2surf->server_stamp++;
 366       dri2dpy->event_handler->invalid_surface(&dri2dpy->base,
 367             &dri2surf->base, dri2surf->server_stamp);
 368    }
 369
 370    return TRUE;
 371 }
 372
 373 static boolean
 374 dri2_surface_validate(struct native_surface *nsurf, uint attachment_mask,
 375                       unsigned int *seq_num, struct pipe_texture **textures,
 376                       int *width, int *height)
 377 {
 378    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 379
 380    if (dri2surf->server_stamp != dri2surf->client_stamp ||
 381        (dri2surf->valid_mask & attachment_mask) != attachment_mask) {
 382       if (!dri2_surface_update_buffers(&dri2surf->base, attachment_mask))
 383          return FALSE;
 384    }
 385
 386    if (seq_num)
 387       *seq_num = dri2surf->client_stamp;
 388
 389    if (textures) {
 390       int att;
 391       for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
 392          if (native_attachment_mask_test(attachment_mask, att)) {
 393             struct pipe_texture *ptex = dri2surf->textures[att];
 394
 395             textures[att] = NULL;
 396             pipe_texture_reference(&textures[att], ptex);
 397          }
 398       }
 399    }
 400
 401    if (width)
 402       *width = dri2surf->width;
 403    if (height)
 404       *height = dri2surf->height;
 405
 406    return TRUE;
 407 }
 408
 409 static void
 410 dri2_surface_wait(struct native_surface *nsurf)
 411 {
 412    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 413    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
 414
 415    if (dri2surf->have_fake) {
 416       x11_drawable_copy_buffers(dri2dpy->xscr, dri2surf->drawable,
 417             0, 0, dri2surf->width, dri2surf->height,
 418             DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 419    }
 420 }
 421
 422 static void
 423 dri2_surface_destroy(struct native_surface *nsurf)
 424 {
 425    struct dri2_surface *dri2surf = dri2_surface(nsurf);
 426    int i;
 427
 428    if (dri2surf->last_xbufs)
 429       free(dri2surf->last_xbufs);
 430
 431    for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
 432       struct pipe_texture *ptex = dri2surf->textures[i];
 433       pipe_texture_reference(&ptex, NULL);
 434    }
 435
 436    if (dri2surf->drawable) {
 437       x11_drawable_enable_dri2(dri2surf->dri2dpy->xscr,
 438             dri2surf->drawable, FALSE);
 439
 440       util_hash_table_remove(dri2surf->dri2dpy->surfaces,
 441             (void *) dri2surf->drawable);
 442    }
 443    free(dri2surf);
 444 }
 445
 446 static struct dri2_surface *
 447 dri2_display_create_surface(struct native_display *ndpy,
 448                             enum dri2_surface_type type,
 449                             Drawable drawable,
 450                             const struct native_config *nconf)
 451 {
 452    struct dri2_display *dri2dpy = dri2_display(ndpy);
 453    struct dri2_config *dri2conf = dri2_config(nconf);
 454    struct dri2_surface *dri2surf;
 455
 456    dri2surf = CALLOC_STRUCT(dri2_surface);
 457    if (!dri2surf)
 458       return NULL;
 459
 460    dri2surf->dri2dpy = dri2dpy;
 461    dri2surf->type = type;
 462    dri2surf->drawable = drawable;
 463    dri2surf->color_format = dri2conf->base.color_format;
 464
 465    dri2surf->base.destroy = dri2_surface_destroy;
 466    dri2surf->base.swap_buffers = dri2_surface_swap_buffers;
 467    dri2surf->base.flush_frontbuffer = dri2_surface_flush_frontbuffer;
 468    dri2surf->base.validate = dri2_surface_validate;
 469    dri2surf->base.wait = dri2_surface_wait;
 470
 471    if (drawable) {
 472       x11_drawable_enable_dri2(dri2dpy->xscr, drawable, TRUE);
 473       /* initialize the geometry */
 474       dri2_surface_update_buffers(&dri2surf->base, 0x0);
 475
 476       util_hash_table_set(dri2surf->dri2dpy->surfaces,
 477             (void *) dri2surf->drawable, (void *) &dri2surf->base);
 478    }
 479
 480    return dri2surf;
 481 }
 482
 483 static struct native_surface *
 484 dri2_display_create_window_surface(struct native_display *ndpy,
 485                                    EGLNativeWindowType win,
 486                                    const struct native_config *nconf)
 487 {
 488    struct dri2_surface *dri2surf;
 489
 490    dri2surf = dri2_display_create_surface(ndpy, DRI2_SURFACE_TYPE_WINDOW,
 491          (Drawable) win, nconf);
 492    return (dri2surf) ? &dri2surf->base : NULL;
 493 }
 494
 495 static struct native_surface *
 496 dri2_display_create_pixmap_surface(struct native_display *ndpy,
 497                                    EGLNativePixmapType pix,
 498                                    const struct native_config *nconf)
 499 {
 500    struct dri2_surface *dri2surf;
 501
 502    dri2surf = dri2_display_create_surface(ndpy, DRI2_SURFACE_TYPE_PIXMAP,
 503          (Drawable) pix, nconf);
 504    return (dri2surf) ? &dri2surf->base : NULL;
 505 }
 506
 507 static struct native_surface *
 508 dri2_display_create_pbuffer_surface(struct native_display *ndpy,
 509                                     const struct native_config *nconf,
 510                                     uint width, uint height)
 511 {
 512    struct dri2_surface *dri2surf;
 513
 514    dri2surf = dri2_display_create_surface(ndpy, DRI2_SURFACE_TYPE_PBUFFER,
 515          (Drawable) None, nconf);
 516    if (dri2surf) {
 517       dri2surf->width = width;
 518       dri2surf->height = height;
 519    }
 520    return (dri2surf) ? &dri2surf->base : NULL;
 521 }
 522
 523 static int
 524 choose_color_format(const __GLcontextModes *mode, enum pipe_format formats[32])
 525 {
 526    int count = 0;
 527
 528    switch (mode->rgbBits) {
 529    case 32:
 530       formats[count++] = PIPE_FORMAT_B8G8R8A8_UNORM;
 531       formats[count++] = PIPE_FORMAT_A8R8G8B8_UNORM;
 532       break;
 533    case 24:
 534       formats[count++] = PIPE_FORMAT_B8G8R8X8_UNORM;
 535       formats[count++] = PIPE_FORMAT_X8R8G8B8_UNORM;
 536       formats[count++] = PIPE_FORMAT_B8G8R8A8_UNORM;
 537       formats[count++] = PIPE_FORMAT_A8R8G8B8_UNORM;
 538       break;
 539    case 16:
 540       formats[count++] = PIPE_FORMAT_B5G6R5_UNORM;
 541       break;
 542    default:
 543       break;
 544    }
 545
 546    return count;
 547 }
 548
 549 static int
 550 choose_depth_stencil_format(const __GLcontextModes *mode,
 551                             enum pipe_format formats[32])
 552 {
 553    int count = 0;
 554
 555    switch (mode->depthBits) {
 556    case 32:
 557       formats[count++] = PIPE_FORMAT_Z32_UNORM;
 558       break;
 559    case 24:
 560       if (mode->stencilBits) {
 561          formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED;
 562          formats[count++] = PIPE_FORMAT_S8_USCALED_Z24_UNORM;
 563       }
 564       else {
 565          formats[count++] = PIPE_FORMAT_Z24X8_UNORM;
 566          formats[count++] = PIPE_FORMAT_X8Z24_UNORM;
 567       }
 568       break;
 569    case 16:
 570       formats[count++] = PIPE_FORMAT_Z16_UNORM;
 571       break;
 572    default:
 573       break;
 574    }
 575
 576    return count;
 577 }
 578
 579 static boolean
 580 is_format_supported(struct pipe_screen *screen,
 581                     enum pipe_format fmt, boolean is_color)
 582 {
 583    return screen->is_format_supported(screen, fmt, PIPE_TEXTURE_2D,
 584          (is_color) ? PIPE_TEXTURE_USAGE_RENDER_TARGET :
 585          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 586 }
 587
 588 static boolean
 589 dri2_display_convert_config(struct native_display *ndpy,
 590                             const __GLcontextModes *mode,
 591                             struct native_config *nconf)
 592 {
 593    enum pipe_format formats[32];
 594    int num_formats, i;
 595
 596    if (!(mode->renderType & GLX_RGBA_BIT) || !mode->rgbMode)
 597       return FALSE;
 598
 599    /* skip single-buffered configs */
 600    if (!mode->doubleBufferMode)
 601       return FALSE;
 602
 603    nconf->mode = *mode;
 604    nconf->mode.renderType = GLX_RGBA_BIT;
 605    nconf->mode.rgbMode = TRUE;
 606    /* pbuffer is allocated locally and is always supported */
 607    nconf->mode.drawableType |= GLX_PBUFFER_BIT;
 608    /* the swap method is always copy */
 609    nconf->mode.swapMethod = GLX_SWAP_COPY_OML;
 610
 611    /* fix up */
 612    nconf->mode.rgbBits =
 613       nconf->mode.redBits + nconf->mode.greenBits +
 614       nconf->mode.blueBits + nconf->mode.alphaBits;
 615    if (!(nconf->mode.drawableType & GLX_WINDOW_BIT)) {
 616       nconf->mode.visualID = 0;
 617       nconf->mode.visualType = GLX_NONE;
 618    }
 619    if (!(nconf->mode.drawableType & GLX_PBUFFER_BIT)) {
 620       nconf->mode.bindToTextureRgb = FALSE;
 621       nconf->mode.bindToTextureRgba = FALSE;
 622    }
 623
 624    nconf->color_format = PIPE_FORMAT_NONE;
 625    nconf->depth_format = PIPE_FORMAT_NONE;
 626    nconf->stencil_format = PIPE_FORMAT_NONE;
 627
 628    /* choose color format */
 629    num_formats = choose_color_format(mode, formats);
 630    for (i = 0; i < num_formats; i++) {
 631       if (is_format_supported(ndpy->screen, formats[i], TRUE)) {
 632          nconf->color_format = formats[i];
 633          break;
 634       }
 635    }
 636    if (nconf->color_format == PIPE_FORMAT_NONE)
 637       return FALSE;
 638
 639    /* choose depth/stencil format */
 640    num_formats = choose_depth_stencil_format(mode, formats);
 641    for (i = 0; i < num_formats; i++) {
 642       if (is_format_supported(ndpy->screen, formats[i], FALSE)) {
 643          nconf->depth_format = formats[i];
 644          nconf->stencil_format = formats[i];
 645          break;
 646       }
 647    }
 648    if ((nconf->mode.depthBits && nconf->depth_format == PIPE_FORMAT_NONE) ||
 649        (nconf->mode.stencilBits && nconf->stencil_format == PIPE_FORMAT_NONE))
 650       return FALSE;
 651
 652    return TRUE;
 653 }
 654
 655 static const struct native_config **
 656 dri2_display_get_configs(struct native_display *ndpy, int *num_configs)
 657 {
 658    struct dri2_display *dri2dpy = dri2_display(ndpy);
 659    const struct native_config **configs;
 660    int i;
 661
 662    /* first time */
 663    if (!dri2dpy->configs) {
 664       const __GLcontextModes *modes;
 665       int num_modes, count;
 666
 667       modes = x11_screen_get_glx_configs(dri2dpy->xscr);
 668       if (!modes)
 669          return NULL;
 670       num_modes = x11_context_modes_count(modes);
 671
 672       dri2dpy->configs = calloc(num_modes, sizeof(*dri2dpy->configs));
 673       if (!dri2dpy->configs)
 674          return NULL;
 675
 676       count = 0;
 677       for (i = 0; i < num_modes; i++) {
 678          struct native_config *nconf = &dri2dpy->configs[count].base;
 679          if (dri2_display_convert_config(&dri2dpy->base, modes, nconf))
 680             count++;
 681          modes = modes->next;
 682       }
 683
 684       dri2dpy->num_configs = count;
 685    }
 686
 687    configs = malloc(dri2dpy->num_configs * sizeof(*configs));
 688    if (configs) {
 689       for (i = 0; i < dri2dpy->num_configs; i++)
 690          configs[i] = (const struct native_config *) &dri2dpy->configs[i];
 691       if (num_configs)
 692          *num_configs = dri2dpy->num_configs;
 693    }
 694
 695    return configs;
 696 }
 697
 698 static boolean
 699 dri2_display_is_pixmap_supported(struct native_display *ndpy,
 700                                  EGLNativePixmapType pix,
 701                                  const struct native_config *nconf)
 702 {
 703    struct dri2_display *dri2dpy = dri2_display(ndpy);
 704    uint depth, nconf_depth;
 705
 706    depth = x11_drawable_get_depth(dri2dpy->xscr, (Drawable) pix);
 707    nconf_depth = util_format_get_blocksizebits(nconf->color_format);
 708
 709    /* simple depth match for now */
 710    return (depth == nconf_depth || (depth == 24 && depth + 8 == nconf_depth));
 711 }
 712
 713 static int
 714 dri2_display_get_param(struct native_display *ndpy,
 715                        enum native_param_type param)
 716 {
 717    int val;
 718
 719    switch (param) {
 720    case NATIVE_PARAM_USE_NATIVE_BUFFER:
 721       /* DRI2GetBuffers use the native buffers */
 722       val = TRUE;
 723       break;
 724    default:
 725       val = 0;
 726       break;
 727    }
 728
 729    return val;
 730 }
 731
 732 static void
 733 dri2_display_destroy(struct native_display *ndpy)
 734 {
 735    struct dri2_display *dri2dpy = dri2_display(ndpy);
 736
 737    if (dri2dpy->configs)
 738       free(dri2dpy->configs);
 739
 740    if (dri2dpy->base.screen)
 741       dri2dpy->base.screen->destroy(dri2dpy->base.screen);
 742
 743    if (dri2dpy->surfaces)
 744       util_hash_table_destroy(dri2dpy->surfaces);
 745
 746    if (dri2dpy->xscr)
 747       x11_screen_destroy(dri2dpy->xscr);
 748    if (dri2dpy->own_dpy)
 749       XCloseDisplay(dri2dpy->dpy);
 750    if (dri2dpy->api && dri2dpy->api->destroy)
 751       dri2dpy->api->destroy(dri2dpy->api);
 752    free(dri2dpy);
 753 }
 754
 755 static void
 756 dri2_display_invalidate_buffers(struct x11_screen *xscr, Drawable drawable,
 757                                 void *user_data)
 758 {
 759    struct native_display *ndpy = (struct native_display* ) user_data;
 760    struct dri2_display *dri2dpy = dri2_display(ndpy);
 761    struct native_surface *nsurf;
 762    struct dri2_surface *dri2surf;
 763
 764    nsurf = (struct native_surface *)
 765       util_hash_table_get(dri2dpy->surfaces, (void *) drawable);
 766    if (!nsurf)
 767       return;
 768
 769    dri2surf = dri2_surface(nsurf);
 770
 771    dri2surf->server_stamp++;
 772    dri2dpy->event_handler->invalid_surface(&dri2dpy->base,
 773          &dri2surf->base, dri2surf->server_stamp);
 774 }
 775
 776 /**
 777  * Initialize DRI2 and pipe screen.
 778  */
 779 static boolean
 780 dri2_display_init_screen(struct native_display *ndpy)
 781 {
 782    struct dri2_display *dri2dpy = dri2_display(ndpy);
 783    const char *driver = dri2dpy->api->name;
 784    struct drm_create_screen_arg arg;
 785    int fd;
 786
 787    if (!x11_screen_support(dri2dpy->xscr, X11_SCREEN_EXTENSION_DRI2) ||
 788        !x11_screen_support(dri2dpy->xscr, X11_SCREEN_EXTENSION_GLX)) {
 789       _eglLog(_EGL_WARNING, "GLX/DRI2 is not supported");
 790       return FALSE;
 791    }
 792
 793    dri2dpy->dri_driver = x11_screen_probe_dri2(dri2dpy->xscr,
 794          &dri2dpy->dri_major, &dri2dpy->dri_minor);
 795    if (!dri2dpy->dri_driver || !driver ||
 796        strcmp(dri2dpy->dri_driver, driver) != 0) {
 797       _eglLog(_EGL_WARNING, "Driver mismatch: %s != %s",
 798             dri2dpy->dri_driver, dri2dpy->api->name);
 799       return FALSE;
 800    }
 801
 802    fd = x11_screen_enable_dri2(dri2dpy->xscr,
 803          dri2_display_invalidate_buffers, &dri2dpy->base);
 804    if (fd < 0)
 805       return FALSE;
 806
 807    memset(&arg, 0, sizeof(arg));
 808    arg.mode = DRM_CREATE_NORMAL;
 809    dri2dpy->base.screen = dri2dpy->api->create_screen(dri2dpy->api, fd, &arg);
 810    if (!dri2dpy->base.screen) {
 811       _eglLog(_EGL_WARNING, "failed to create DRM screen");
 812       return FALSE;
 813    }
 814
 815    return TRUE;
 816 }
 817
 818 static unsigned
 819 dri2_display_hash_table_hash(void *key)
 820 {
 821    XID drawable = pointer_to_uintptr(key);
 822    return (unsigned) drawable;
 823 }
 824
 825 static int
 826 dri2_display_hash_table_compare(void *key1, void *key2)
 827 {
 828    return (key1 - key2);
 829 }
 830
 831 struct native_display *
 832 x11_create_dri2_display(EGLNativeDisplayType dpy,
 833                         struct native_event_handler *event_handler,
 834                         struct drm_api *api)
 835 {
 836    struct dri2_display *dri2dpy;
 837
 838    dri2dpy = CALLOC_STRUCT(dri2_display);
 839    if (!dri2dpy)
 840       return NULL;
 841
 842    dri2dpy->event_handler = event_handler;
 843    dri2dpy->api = api;
 844
 845    dri2dpy->dpy = dpy;
 846    if (!dri2dpy->dpy) {
 847       dri2dpy->dpy = XOpenDisplay(NULL);
 848       if (!dri2dpy->dpy) {
 849          dri2_display_destroy(&dri2dpy->base);
 850          return NULL;
 851       }
 852       dri2dpy->own_dpy = TRUE;
 853    }
 854
 855    dri2dpy->xscr_number = DefaultScreen(dri2dpy->dpy);
 856    dri2dpy->xscr = x11_screen_create(dri2dpy->dpy, dri2dpy->xscr_number);
 857    if (!dri2dpy->xscr) {
 858       dri2_display_destroy(&dri2dpy->base);
 859       return NULL;
 860    }
 861
 862    if (!dri2_display_init_screen(&dri2dpy->base)) {
 863       dri2_display_destroy(&dri2dpy->base);
 864       return NULL;
 865    }
 866
 867    dri2dpy->surfaces = util_hash_table_create(dri2_display_hash_table_hash,
 868          dri2_display_hash_table_compare);
 869    if (!dri2dpy->surfaces) {
 870       dri2_display_destroy(&dri2dpy->base);
 871       return NULL;
 872    }
 873
 874    dri2dpy->base.destroy = dri2_display_destroy;
 875    dri2dpy->base.get_param = dri2_display_get_param;
 876    dri2dpy->base.get_configs = dri2_display_get_configs;
 877    dri2dpy->base.is_pixmap_supported = dri2_display_is_pixmap_supported;
 878    dri2dpy->base.create_window_surface = dri2_display_create_window_surface;
 879    dri2dpy->base.create_pixmap_surface = dri2_display_create_pixmap_surface;
 880    dri2dpy->base.create_pbuffer_surface = dri2_display_create_pbuffer_surface;
 881
 882    return &dri2dpy->base;
 883 }