src/gallium/targets/egl/egl.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright (C) 2010 LunarG Inc.
   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  * Authors:
  26  *    Chia-I Wu <olv@lunarg.com>
  27  */
  28
  29 #include "util/u_debug.h"
  30 #include "util/u_string.h"
  31 #include "util/u_memory.h"
  32 #include "util/u_dl.h"
  33 #include "egldriver.h"
  34 #include "egllog.h"
  35
  36 #include "state_tracker/st_api.h"
  37 #include "state_tracker/drm_driver.h"
  38 #include "common/egl_g3d_loader.h"
  39
  40 #include "egl.h"
  41
  42 struct egl_g3d_loader egl_g3d_loader;
  43
  44 static struct st_module {
  45    boolean initialized;
  46    char *name;
  47    struct util_dl_library *lib;
  48    struct st_api *stapi;
  49 } st_modules[ST_API_COUNT];
  50
  51 static struct pipe_module {
  52    boolean initialized;
  53    char *name;
  54    struct util_dl_library *lib;
  55    const struct drm_driver_descriptor *drmdd;
  56    struct pipe_screen *(*swrast_create_screen)(struct sw_winsys *);
  57 } pipe_modules[16];
  58
  59 static char *
  60 loader_strdup(const char *s)
  61 {
  62    size_t len = (s) ? strlen(s) : 0;
  63    char *t = MALLOC(len + 1);
  64    if (t) {
  65       memcpy(t, s, len);
  66       t[len] = '\0';
  67    }
  68    return t;
  69 }
  70
  71 static EGLBoolean
  72 dlopen_st_module_cb(const char *dir, size_t len, void *callback_data)
  73 {
  74    struct st_module *stmod =
  75       (struct st_module *) callback_data;
  76    char path[1024];
  77    int ret;
  78
  79    if (len) {
  80       ret = util_snprintf(path, sizeof(path),
  81             "%.*s/" ST_PREFIX "%s" UTIL_DL_EXT, len, dir, stmod->name);
  82    }
  83    else {
  84       ret = util_snprintf(path, sizeof(path),
  85             ST_PREFIX "%s" UTIL_DL_EXT, stmod->name);
  86    }
  87
  88    if (ret > 0 && ret < sizeof(path)) {
  89       stmod->lib = util_dl_open(path);
  90       if (stmod->lib)
  91          _eglLog(_EGL_DEBUG, "loaded %s", path);
  92    }
  93
  94    return !(stmod->lib);
  95 }
  96
  97 static boolean
  98 load_st_module(struct st_module *stmod,
  99                        const char *name, const char *procname)
 100 {
 101    struct st_api *(*create_api)(void);
 102
 103    _eglLog(_EGL_DEBUG, "searching for st module %s", name);
 104
 105    stmod->name = loader_strdup(name);
 106    if (stmod->name)
 107       _eglSearchPathForEach(dlopen_st_module_cb, (void *) stmod);
 108    else
 109       stmod->lib = util_dl_open(NULL);
 110
 111    if (stmod->lib) {
 112       create_api = (struct st_api *(*)(void))
 113          util_dl_get_proc_address(stmod->lib, procname);
 114       if (create_api)
 115          stmod->stapi = create_api();
 116
 117       if (!stmod->stapi) {
 118          util_dl_close(stmod->lib);
 119          stmod->lib = NULL;
 120       }
 121    }
 122
 123    if (!stmod->stapi) {
 124       FREE(stmod->name);
 125       stmod->name = NULL;
 126    }
 127
 128    return (stmod->stapi != NULL);
 129 }
 130
 131 static EGLBoolean
 132 dlopen_pipe_module_cb(const char *dir, size_t len, void *callback_data)
 133 {
 134    struct pipe_module *pmod = (struct pipe_module *) callback_data;
 135    char path[1024];
 136    int ret;
 137
 138    if (len) {
 139       ret = util_snprintf(path, sizeof(path),
 140             "%.*s/" PIPE_PREFIX "%s" UTIL_DL_EXT, len, dir, pmod->name);
 141    }
 142    else {
 143       ret = util_snprintf(path, sizeof(path),
 144             PIPE_PREFIX "%s" UTIL_DL_EXT, pmod->name);
 145    }
 146    if (ret > 0 && ret < sizeof(path)) {
 147       pmod->lib = util_dl_open(path);
 148       if (pmod->lib)
 149          _eglLog(_EGL_DEBUG, "loaded %s", path);
 150    }
 151
 152    return !(pmod->lib);
 153 }
 154
 155 static boolean
 156 load_pipe_module(struct pipe_module *pmod, const char *name)
 157 {
 158    pmod->name = loader_strdup(name);
 159    if (!pmod->name)
 160       return FALSE;
 161
 162    _eglLog(_EGL_DEBUG, "searching for pipe module %s", pmod->name);
 163    _eglSearchPathForEach(dlopen_pipe_module_cb, (void *) pmod);
 164    if (pmod->lib) {
 165       pmod->drmdd = (const struct drm_driver_descriptor *)
 166          util_dl_get_proc_address(pmod->lib, "driver_descriptor");
 167
 168       /* sanity check on the name */
 169       if (pmod->drmdd && strcmp(pmod->drmdd->name, pmod->name) != 0)
 170          pmod->drmdd = NULL;
 171
 172       /* swrast */
 173       if (pmod->drmdd && !pmod->drmdd->driver_name) {
 174          pmod->swrast_create_screen =
 175             (struct pipe_screen *(*)(struct sw_winsys *))
 176             util_dl_get_proc_address(pmod->lib, "swrast_create_screen");
 177          if (!pmod->swrast_create_screen)
 178             pmod->drmdd = NULL;
 179       }
 180
 181       if (!pmod->drmdd) {
 182          util_dl_close(pmod->lib);
 183          pmod->lib = NULL;
 184       }
 185    }
 186
 187    return (pmod->drmdd != NULL);
 188 }
 189
 190 static struct st_api *
 191 get_st_api_full(enum st_api_type api, enum st_profile_type profile)
 192 {
 193    struct st_module *stmod = &st_modules[api];
 194    const char *names[8], *symbol;
 195    int i, count = 0;
 196
 197    if (stmod->initialized)
 198       return stmod->stapi;
 199
 200    switch (api) {
 201    case ST_API_OPENGL:
 202       symbol = ST_CREATE_OPENGL_SYMBOL;
 203       switch (profile) {
 204       case ST_PROFILE_OPENGL_ES1:
 205          names[count++] = "GLESv1_CM";
 206          names[count++] = "GL";
 207          break;
 208       case ST_PROFILE_OPENGL_ES2:
 209          names[count++] = "GLESv2";
 210          names[count++] = "GL";
 211          break;
 212       default:
 213          names[count++] = "GL";
 214          break;
 215       }
 216       break;
 217    case ST_API_OPENVG:
 218       symbol = ST_CREATE_OPENVG_SYMBOL;
 219       names[count++] = "OpenVG";
 220       break;
 221    default:
 222       symbol = NULL;
 223       assert(!"Unknown API Type\n");
 224       break;
 225    }
 226
 227    /* NULL means the process itself */
 228    names[count++] = NULL;
 229
 230    for (i = 0; i < count; i++) {
 231       if (load_st_module(stmod, names[i], symbol))
 232          break;
 233    }
 234
 235    if (!stmod->stapi) {
 236       EGLint level = (egl_g3d_loader.profile_masks[api]) ?
 237          _EGL_WARNING : _EGL_DEBUG;
 238       _eglLog(level, "unable to load " ST_PREFIX "%s" UTIL_DL_EXT, names[0]);
 239    }
 240
 241    stmod->initialized = TRUE;
 242
 243    return stmod->stapi;
 244 }
 245
 246 static struct st_api *
 247 get_st_api(enum st_api_type api)
 248 {
 249    enum st_profile_type profile = ST_PROFILE_DEFAULT;
 250
 251    /* determine the profile from the linked libraries */
 252    if (api == ST_API_OPENGL) {
 253       struct util_dl_library *self;
 254
 255       self = util_dl_open(NULL);
 256       if (self) {
 257          if (util_dl_get_proc_address(self, "glColor4x"))
 258             profile = ST_PROFILE_OPENGL_ES1;
 259          else if (util_dl_get_proc_address(self, "glShaderBinary"))
 260             profile = ST_PROFILE_OPENGL_ES2;
 261          util_dl_close(self);
 262       }
 263    }
 264
 265    return get_st_api_full(api, profile);
 266 }
 267
 268 static struct st_api *
 269 guess_gl_api(enum st_profile_type profile)
 270 {
 271    return get_st_api_full(ST_API_OPENGL, profile);
 272 }
 273
 274 static struct pipe_module *
 275 get_pipe_module(const char *name)
 276 {
 277    struct pipe_module *pmod = NULL;
 278    int i;
 279
 280    if (!name)
 281       return NULL;
 282
 283    for (i = 0; i < Elements(pipe_modules); i++) {
 284       if (!pipe_modules[i].initialized ||
 285           strcmp(pipe_modules[i].name, name) == 0) {
 286          pmod = &pipe_modules[i];
 287          break;
 288       }
 289    }
 290    if (!pmod)
 291       return NULL;
 292
 293    if (!pmod->initialized) {
 294       load_pipe_module(pmod, name);
 295       pmod->initialized = TRUE;
 296    }
 297
 298    return pmod;
 299 }
 300
 301 static struct pipe_screen *
 302 create_drm_screen(const char *name, int fd)
 303 {
 304    struct pipe_module *pmod = get_pipe_module(name);
 305    return (pmod && pmod->drmdd && pmod->drmdd->create_screen) ?
 306       pmod->drmdd->create_screen(fd) : NULL;
 307 }
 308
 309 static struct pipe_screen *
 310 create_sw_screen(struct sw_winsys *ws)
 311 {
 312    struct pipe_module *pmod = get_pipe_module("swrast");
 313    return (pmod && pmod->swrast_create_screen) ?
 314       pmod->swrast_create_screen(ws) : NULL;
 315 }
 316
 317 static const struct egl_g3d_loader *
 318 loader_init(void)
 319 {
 320    /* TODO detect at runtime? */
 321 #if FEATURE_GL
 322    egl_g3d_loader.profile_masks[ST_API_OPENGL] |= ST_PROFILE_DEFAULT_MASK;
 323 #endif
 324 #if FEATURE_ES1
 325    egl_g3d_loader.profile_masks[ST_API_OPENGL] |= ST_PROFILE_OPENGL_ES1_MASK;
 326 #endif
 327 #if FEATURE_ES2
 328    egl_g3d_loader.profile_masks[ST_API_OPENGL] |= ST_PROFILE_OPENGL_ES2_MASK;
 329 #endif
 330 #if FEATURE_VG
 331    egl_g3d_loader.profile_masks[ST_API_OPENVG] |= ST_PROFILE_DEFAULT_MASK;
 332 #endif
 333
 334    egl_g3d_loader.get_st_api = get_st_api;
 335    egl_g3d_loader.guess_gl_api = guess_gl_api;
 336    egl_g3d_loader.create_drm_screen = create_drm_screen;
 337    egl_g3d_loader.create_sw_screen = create_sw_screen;
 338
 339    return &egl_g3d_loader;
 340 }
 341
 342 static void
 343 loader_fini(void)
 344 {
 345    int i;
 346
 347    for (i = 0; i < ST_API_COUNT; i++) {
 348       struct st_module *stmod = &st_modules[i];
 349
 350       if (stmod->stapi) {
 351          stmod->stapi->destroy(stmod->stapi);
 352          stmod->stapi = NULL;
 353       }
 354       if (stmod->lib) {
 355          util_dl_close(stmod->lib);
 356          stmod->lib = NULL;
 357       }
 358       if (stmod->name) {
 359          FREE(stmod->name);
 360          stmod->name = NULL;
 361       }
 362       stmod->initialized = FALSE;
 363    }
 364    for (i = 0; i < Elements(pipe_modules); i++) {
 365       struct pipe_module *pmod = &pipe_modules[i];
 366
 367       if (!pmod->initialized)
 368          break;
 369
 370       pmod->drmdd = NULL;
 371       pmod->swrast_create_screen = NULL;
 372       if (pmod->lib) {
 373          util_dl_close(pmod->lib);
 374          pmod->lib = NULL;
 375       }
 376       if (pmod->name) {
 377          FREE(pmod->name);
 378          pmod->name = NULL;
 379       }
 380       pmod->initialized = FALSE;
 381    }
 382 }
 383
 384 static void
 385 egl_g3d_unload(_EGLDriver *drv)
 386 {
 387    egl_g3d_destroy_driver(drv);
 388    loader_fini();
 389 }
 390
 391 _EGLDriver *
 392 _eglMain(const char *args)
 393 {
 394    const struct egl_g3d_loader *loader;
 395    _EGLDriver *drv;
 396
 397    loader = loader_init();
 398    drv = egl_g3d_create_driver(loader);
 399    if (!drv) {
 400       loader_fini();
 401       return NULL;
 402    }
 403
 404    drv->Name = "Gallium";
 405    drv->Unload = egl_g3d_unload;
 406
 407    return drv;
 408 }