src/gallium/state_trackers/egl/common/native_helper.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright (C) 2010 LunarG Inc.
   6  * Copyright (C) 2011 VMware Inc. All rights reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Chia-I Wu <olv@lunarg.com>
  28  *    Thomas Hellstrom <thellstrom@vmware.com>
  29  */
  30
  31 #include "util/u_inlines.h"
  32 #include "util/u_memory.h"
  33 #include "pipe/p_screen.h"
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_state.h"
  36
  37 #include "native_helper.h"
  38
  39 /**
  40  * Number of swap fences and mask
  41  */
  42
  43 #define EGL_SWAP_FENCES_MAX 4
  44 #define EGL_SWAP_FENCES_MASK 3
  45 #define EGL_SWAP_FENCES_DEFAULT 1
  46
  47 struct resource_surface {
  48    struct pipe_screen *screen;
  49    enum pipe_format format;
  50    uint bind;
  51
  52    struct pipe_resource *resources[NUM_NATIVE_ATTACHMENTS];
  53    uint resource_mask;
  54    uint width, height;
  55
  56    /**
  57     * Swap fences.
  58     */
  59    struct pipe_fence_handle *swap_fences[EGL_SWAP_FENCES_MAX];
  60    unsigned int cur_fences;
  61    unsigned int head;
  62    unsigned int tail;
  63    unsigned int desired_fences;
  64 };
  65
  66 struct resource_surface *
  67 resource_surface_create(struct pipe_screen *screen,
  68                         enum pipe_format format, uint bind)
  69 {
  70    struct resource_surface *rsurf = CALLOC_STRUCT(resource_surface);
  71    char *swap_fences = getenv("EGL_THROTTLE_FENCES");
  72
  73    if (rsurf) {
  74       rsurf->screen = screen;
  75       rsurf->format = format;
  76       rsurf->bind = bind;
  77       rsurf->desired_fences = (swap_fences) ? atoi(swap_fences) :
  78          EGL_SWAP_FENCES_DEFAULT;
  79       if (rsurf->desired_fences > EGL_SWAP_FENCES_MAX)
  80          rsurf->desired_fences = EGL_SWAP_FENCES_MAX;
  81    }
  82
  83    return rsurf;
  84 }
  85
  86 static void
  87 resource_surface_free_resources(struct resource_surface *rsurf)
  88 {
  89    if (rsurf->resource_mask) {
  90       int i;
  91
  92       for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
  93          if (rsurf->resources[i])
  94             pipe_resource_reference(&rsurf->resources[i], NULL);
  95       }
  96       rsurf->resource_mask = 0x0;
  97    }
  98 }
  99
 100 void
 101 resource_surface_destroy(struct resource_surface *rsurf)
 102 {
 103    resource_surface_free_resources(rsurf);
 104    FREE(rsurf);
 105 }
 106
 107 boolean
 108 resource_surface_set_size(struct resource_surface *rsurf,
 109                           uint width, uint height)
 110 {
 111    boolean changed = FALSE;
 112
 113    if (rsurf->width != width || rsurf->height != height) {
 114       resource_surface_free_resources(rsurf);
 115       rsurf->width = width;
 116       rsurf->height = height;
 117       changed = TRUE;
 118    }
 119
 120    return changed;
 121 }
 122
 123 void
 124 resource_surface_get_size(struct resource_surface *rsurf,
 125                           uint *width, uint *height)
 126 {
 127    if (width)
 128       *width = rsurf->width;
 129    if (height)
 130       *height = rsurf->height;
 131 }
 132
 133 boolean
 134 resource_surface_add_resources(struct resource_surface *rsurf,
 135                                uint resource_mask)
 136 {
 137    struct pipe_resource templ;
 138    int i;
 139
 140    resource_mask &= ~rsurf->resource_mask;
 141    if (!resource_mask)
 142       return TRUE;
 143
 144    if (!rsurf->width || !rsurf->height)
 145       return FALSE;
 146
 147    memset(&templ, 0, sizeof(templ));
 148    templ.target = PIPE_TEXTURE_2D;
 149    templ.format = rsurf->format;
 150    templ.bind = rsurf->bind;
 151    templ.width0 = rsurf->width;
 152    templ.height0 = rsurf->height;
 153    templ.depth0 = 1;
 154    templ.array_size = 1;
 155
 156    for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
 157       if (resource_mask & (1 <<i)) {
 158          assert(!rsurf->resources[i]);
 159
 160          rsurf->resources[i] =
 161             rsurf->screen->resource_create(rsurf->screen, &templ);
 162          if (rsurf->resources[i])
 163             rsurf->resource_mask |= 1 << i;
 164       }
 165    }
 166
 167    return ((rsurf->resource_mask & resource_mask) == resource_mask);
 168 }
 169
 170 void
 171 resource_surface_import_resource(struct resource_surface *rsurf,
 172                                  enum native_attachment which,
 173                                  struct pipe_resource *pres)
 174 {
 175         pipe_resource_reference(&rsurf->resources[which], pres);
 176         rsurf->resource_mask |= 1 << which;
 177 }
 178
 179 void
 180 resource_surface_get_resources(struct resource_surface *rsurf,
 181                                struct pipe_resource **resources,
 182                                uint resource_mask)
 183 {
 184    int i;
 185
 186    for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
 187       if (resource_mask & (1 << i)) {
 188          resources[i] = NULL;
 189          pipe_resource_reference(&resources[i], rsurf->resources[i]);
 190       }
 191    }
 192 }
 193
 194 struct pipe_resource *
 195 resource_surface_get_single_resource(struct resource_surface *rsurf,
 196                                      enum native_attachment which)
 197 {
 198    struct pipe_resource *pres = NULL;
 199    pipe_resource_reference(&pres, rsurf->resources[which]);
 200    return pres;
 201 }
 202
 203 static INLINE void
 204 pointer_swap(const void **p1, const void **p2)
 205 {
 206    const void *tmp = *p1;
 207    *p1 = *p2;
 208    *p2 = tmp;
 209 }
 210
 211 void
 212 resource_surface_swap_buffers(struct resource_surface *rsurf,
 213                               enum native_attachment buf1,
 214                               enum native_attachment buf2,
 215                               boolean only_if_exist)
 216 {
 217    const uint buf1_bit = 1 << buf1;
 218    const uint buf2_bit = 1 << buf2;
 219    uint mask;
 220
 221    if (only_if_exist && !(rsurf->resources[buf1] && rsurf->resources[buf2]))
 222       return;
 223
 224    pointer_swap((const void **) &rsurf->resources[buf1],
 225                 (const void **) &rsurf->resources[buf2]);
 226
 227    /* swap mask bits */
 228    mask = rsurf->resource_mask & ~(buf1_bit | buf2_bit);
 229    if (rsurf->resource_mask & buf1_bit)
 230       mask |= buf2_bit;
 231    if (rsurf->resource_mask & buf2_bit)
 232       mask |= buf1_bit;
 233
 234    rsurf->resource_mask = mask;
 235 }
 236
 237 boolean
 238 resource_surface_present(struct resource_surface *rsurf,
 239                          enum native_attachment which,
 240                          void *winsys_drawable_handle)
 241 {
 242    struct pipe_resource *pres = rsurf->resources[which];
 243
 244    if (!pres)
 245       return TRUE;
 246
 247    rsurf->screen->flush_frontbuffer(rsurf->screen,
 248          pres, 0, 0, winsys_drawable_handle);
 249
 250    return TRUE;
 251 }
 252
 253 /**
 254  * Schedule a copy swap from the back to the front buffer using the
 255  * native display's copy context.
 256  */
 257 boolean
 258 resource_surface_copy_swap(struct resource_surface *rsurf,
 259                            struct native_display *ndpy)
 260 {
 261    struct pipe_resource *ftex;
 262    struct pipe_resource *btex;
 263    struct pipe_context *pipe;
 264    struct pipe_box src_box;
 265    boolean ret = FALSE;
 266
 267    pipe = ndpy_get_copy_context(ndpy);
 268    if (!pipe)
 269       return FALSE;
 270
 271    ftex = resource_surface_get_single_resource(rsurf,
 272                                                NATIVE_ATTACHMENT_FRONT_LEFT);
 273    if (!ftex)
 274       goto out_no_ftex;
 275    btex = resource_surface_get_single_resource(rsurf,
 276                                                NATIVE_ATTACHMENT_BACK_LEFT);
 277    if (!btex)
 278       goto out_no_btex;
 279
 280    u_box_origin_2d(ftex->width0, ftex->height0, &src_box);
 281    pipe->resource_copy_region(pipe, ftex, 0, 0, 0, 0,
 282                               btex, 0, &src_box);
 283    ret = TRUE;
 284
 285  out_no_ftex:
 286    pipe_resource_reference(&btex, NULL);
 287  out_no_btex:
 288    pipe_resource_reference(&ftex, NULL);
 289
 290    return ret;
 291 }
 292
 293 static struct pipe_fence_handle *
 294 swap_fences_pop_front(struct resource_surface *rsurf)
 295 {
 296    struct pipe_screen *screen = rsurf->screen;
 297    struct pipe_fence_handle *fence = NULL;
 298
 299    if (rsurf->desired_fences == 0)
 300       return NULL;
 301
 302    if (rsurf->cur_fences >= rsurf->desired_fences) {
 303       screen->fence_reference(screen, &fence, rsurf->swap_fences[rsurf->tail]);
 304       screen->fence_reference(screen, &rsurf->swap_fences[rsurf->tail++], NULL);
 305       rsurf->tail &= EGL_SWAP_FENCES_MASK;
 306       --rsurf->cur_fences;
 307    }
 308    return fence;
 309 }
 310
 311 static void
 312 swap_fences_push_back(struct resource_surface *rsurf,
 313                       struct pipe_fence_handle *fence)
 314 {
 315    struct pipe_screen *screen = rsurf->screen;
 316
 317    if (!fence || rsurf->desired_fences == 0)
 318       return;
 319
 320    while(rsurf->cur_fences == rsurf->desired_fences)
 321       swap_fences_pop_front(rsurf);
 322
 323    rsurf->cur_fences++;
 324    screen->fence_reference(screen, &rsurf->swap_fences[rsurf->head++],
 325                            fence);
 326    rsurf->head &= EGL_SWAP_FENCES_MASK;
 327 }
 328
 329 boolean
 330 resource_surface_throttle(struct resource_surface *rsurf)
 331 {
 332    struct pipe_screen *screen = rsurf->screen;
 333    struct pipe_fence_handle *fence = swap_fences_pop_front(rsurf);
 334
 335    if (fence) {
 336       (void) screen->fence_finish(screen, fence, PIPE_TIMEOUT_INFINITE);
 337       screen->fence_reference(screen, &fence, NULL);
 338       return TRUE;
 339    }
 340
 341    return FALSE;
 342 }
 343
 344 boolean
 345 resource_surface_flush(struct resource_surface *rsurf,
 346                        struct native_display *ndpy)
 347 {
 348    struct pipe_fence_handle *fence = NULL;
 349    struct pipe_screen *screen = rsurf->screen;
 350    struct pipe_context *pipe= ndpy_get_copy_context(ndpy);
 351
 352    if (!pipe)
 353       return FALSE;
 354
 355    pipe->flush(pipe, &fence);
 356    if (fence == NULL)
 357       return FALSE;
 358
 359    swap_fences_push_back(rsurf, fence);
 360    screen->fence_reference(screen, &fence, NULL);
 361
 362    return TRUE;
 363 }
 364
 365 void
 366 resource_surface_wait(struct resource_surface *rsurf)
 367 {
 368    while (resource_surface_throttle(rsurf));
 369 }
 370
 371 #include "state_tracker/drm_driver.h"
 372 struct pipe_resource *
 373 drm_display_import_native_buffer(struct native_display *ndpy,
 374                                  struct native_buffer *nbuf)
 375 {
 376    struct pipe_screen *screen = ndpy->screen;
 377    struct pipe_resource *res = NULL;
 378
 379    switch (nbuf->type) {
 380    case NATIVE_BUFFER_DRM:
 381       {
 382          struct winsys_handle wsh;
 383
 384          memset(&wsh, 0, sizeof(wsh));
 385          wsh.handle = nbuf->u.drm.name;
 386          wsh.stride = nbuf->u.drm.stride;
 387
 388          res = screen->resource_from_handle(screen, &nbuf->u.drm.templ, &wsh);
 389       }
 390       break;
 391    default:
 392       break;
 393    }
 394
 395    return res;
 396 }
 397
 398 boolean
 399 drm_display_export_native_buffer(struct native_display *ndpy,
 400                                  struct pipe_resource *res,
 401                                  struct native_buffer *nbuf)
 402 {
 403    struct pipe_screen *screen = ndpy->screen;
 404    boolean ret = FALSE;
 405
 406    switch (nbuf->type) {
 407    case NATIVE_BUFFER_DRM:
 408       {
 409          struct winsys_handle wsh;
 410
 411          if ((nbuf->u.drm.templ.bind & res->bind) != nbuf->u.drm.templ.bind)
 412             break;
 413
 414          memset(&wsh, 0, sizeof(wsh));
 415          wsh.type = DRM_API_HANDLE_TYPE_KMS;
 416          if (!screen->resource_get_handle(screen, res, &wsh))
 417             break;
 418
 419          nbuf->u.drm.handle = wsh.handle;
 420          nbuf->u.drm.stride = wsh.stride;
 421
 422          /* get the name of the GEM object */
 423          if (nbuf->u.drm.templ.bind & PIPE_BIND_SHARED) {
 424             memset(&wsh, 0, sizeof(wsh));
 425             wsh.type = DRM_API_HANDLE_TYPE_SHARED;
 426             if (!screen->resource_get_handle(screen, res, &wsh))
 427                break;
 428
 429             nbuf->u.drm.name = wsh.handle;
 430          }
 431
 432          nbuf->u.drm.templ = *res;
 433          ret = TRUE;
 434       }
 435       break;
 436    default:
 437       break;
 438    }
 439
 440    return ret;
 441 }