src/gallium/state_trackers/dri/dri_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27 /*
  28  * Author: Keith Whitwell <keithw@vmware.com>
  29  * Author: Jakob Bornecrantz <wallbraker@gmail.com>
  30  */
  31
  32 #include "utils.h"
  33
  34 #include "dri_screen.h"
  35 #include "dri_drawable.h"
  36 #include "dri_context.h"
  37 #include "state_tracker/drm_driver.h"
  38
  39 #include "pipe/p_context.h"
  40 #include "pipe-loader/pipe_loader.h"
  41 #include "state_tracker/st_context.h"
  42
  43 GLboolean
  44 dri_create_context(gl_api api, const struct gl_config * visual,
  45                    __DRIcontext * cPriv,
  46                    const struct __DriverContextConfig *ctx_config,
  47                    unsigned *error,
  48                    void *sharedContextPrivate)
  49 {
  50    __DRIscreen *sPriv = cPriv->driScreenPriv;
  51    struct dri_screen *screen = dri_screen(sPriv);
  52    struct st_api *stapi = screen->st_api;
  53    struct dri_context *ctx = NULL;
  54    struct st_context_iface *st_share = NULL;
  55    struct st_context_attribs attribs;
  56    enum st_context_error ctx_err = 0;
  57    unsigned allowed_flags = __DRI_CTX_FLAG_DEBUG |
  58                             __DRI_CTX_FLAG_FORWARD_COMPATIBLE |
  59                             __DRI_CTX_FLAG_NO_ERROR;
  60    unsigned allowed_attribs =
  61       __DRIVER_CONTEXT_ATTRIB_PRIORITY |
  62       __DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR;
  63    const __DRIbackgroundCallableExtension *backgroundCallable =
  64       screen->sPriv->dri2.backgroundCallable;
  65    const struct driOptionCache *optionCache = &screen->dev->option_cache;
  66
  67    if (screen->has_reset_status_query) {
  68       allowed_flags |= __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS;
  69       allowed_attribs |= __DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY;
  70    }
  71
  72    if (ctx_config->flags & ~allowed_flags) {
  73       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
  74       goto fail;
  75    }
  76
  77    if (ctx_config->attribute_mask & ~allowed_attribs) {
  78       *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
  79       goto fail;
  80    }
  81
  82    memset(&attribs, 0, sizeof(attribs));
  83    switch (api) {
  84    case API_OPENGLES:
  85       attribs.profile = ST_PROFILE_OPENGL_ES1;
  86       break;
  87    case API_OPENGLES2:
  88       attribs.profile = ST_PROFILE_OPENGL_ES2;
  89       break;
  90    case API_OPENGL_COMPAT:
  91    case API_OPENGL_CORE:
  92       if (driQueryOptionb(optionCache, "force_compat_profile")) {
  93          attribs.profile = ST_PROFILE_DEFAULT;
  94       } else {
  95          attribs.profile = api == API_OPENGL_COMPAT ? ST_PROFILE_DEFAULT
  96                                                     : ST_PROFILE_OPENGL_CORE;
  97       }
  98
  99       attribs.major = ctx_config->major_version;
 100       attribs.minor = ctx_config->minor_version;
 101
 102       if ((ctx_config->flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 103          attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
 104       break;
 105    default:
 106       *error = __DRI_CTX_ERROR_BAD_API;
 107       goto fail;
 108    }
 109
 110    if ((ctx_config->flags & __DRI_CTX_FLAG_DEBUG) != 0)
 111       attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
 112
 113    if (ctx_config->flags & __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)
 114       attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
 115
 116    if (ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY)
 117       if (ctx_config->reset_strategy != __DRI_CTX_RESET_NO_NOTIFICATION)
 118          attribs.flags |= ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED;
 119
 120    if (ctx_config->flags & __DRI_CTX_FLAG_NO_ERROR)
 121       attribs.flags |= ST_CONTEXT_FLAG_NO_ERROR;
 122
 123    if (ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_PRIORITY) {
 124       switch (ctx_config->priority) {
 125       case __DRI_CTX_PRIORITY_LOW:
 126          attribs.flags |= ST_CONTEXT_FLAG_LOW_PRIORITY;
 127          break;
 128       case __DRI_CTX_PRIORITY_HIGH:
 129          attribs.flags |= ST_CONTEXT_FLAG_HIGH_PRIORITY;
 130          break;
 131       default:
 132          break;
 133       }
 134    }
 135
 136    if ((ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR)
 137        && (ctx_config->release_behavior == __DRI_CTX_RELEASE_BEHAVIOR_NONE))
 138       attribs.flags |= ST_CONTEXT_FLAG_RELEASE_NONE;
 139
 140    struct dri_context *share_ctx = NULL;
 141    if (sharedContextPrivate) {
 142       share_ctx = (struct dri_context *)sharedContextPrivate;
 143       st_share = share_ctx->st;
 144    }
 145
 146    ctx = CALLOC_STRUCT(dri_context);
 147    if (ctx == NULL) {
 148       *error = __DRI_CTX_ERROR_NO_MEMORY;
 149       goto fail;
 150    }
 151
 152    cPriv->driverPrivate = ctx;
 153    ctx->cPriv = cPriv;
 154    ctx->sPriv = sPriv;
 155
 156    if (driQueryOptionb(&screen->dev->option_cache, "mesa_no_error"))
 157       attribs.flags |= ST_CONTEXT_FLAG_NO_ERROR;
 158
 159    attribs.options = screen->options;
 160    dri_fill_st_visual(&attribs.visual, screen, visual);
 161    ctx->st = stapi->create_context(stapi, &screen->base, &attribs, &ctx_err,
 162                                    st_share);
 163    if (ctx->st == NULL) {
 164       switch (ctx_err) {
 165       case ST_CONTEXT_SUCCESS:
 166          *error = __DRI_CTX_ERROR_SUCCESS;
 167          break;
 168       case ST_CONTEXT_ERROR_NO_MEMORY:
 169          *error = __DRI_CTX_ERROR_NO_MEMORY;
 170          break;
 171       case ST_CONTEXT_ERROR_BAD_API:
 172          *error = __DRI_CTX_ERROR_BAD_API;
 173          break;
 174       case ST_CONTEXT_ERROR_BAD_VERSION:
 175          *error = __DRI_CTX_ERROR_BAD_VERSION;
 176          break;
 177       case ST_CONTEXT_ERROR_BAD_FLAG:
 178          *error = __DRI_CTX_ERROR_BAD_FLAG;
 179          break;
 180       case ST_CONTEXT_ERROR_UNKNOWN_ATTRIBUTE:
 181          *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 182          break;
 183       case ST_CONTEXT_ERROR_UNKNOWN_FLAG:
 184          *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 185          break;
 186       }
 187       goto fail;
 188    }
 189    ctx->st->st_manager_private = (void *) ctx;
 190    ctx->stapi = stapi;
 191
 192    if (ctx->st->cso_context) {
 193       ctx->pp = pp_init(ctx->st->pipe, screen->pp_enabled, ctx->st->cso_context);
 194       ctx->hud = hud_create(ctx->st->cso_context,
 195                             share_ctx ? share_ctx->hud : NULL);
 196    }
 197
 198    /* Do this last. */
 199    if (ctx->st->start_thread &&
 200          driQueryOptionb(&screen->dev->option_cache, "mesa_glthread")) {
 201
 202       if (backgroundCallable && backgroundCallable->base.version >= 2 &&
 203             backgroundCallable->isThreadSafe) {
 204
 205          if (backgroundCallable->isThreadSafe(cPriv->loaderPrivate))
 206             ctx->st->start_thread(ctx->st);
 207          else
 208             fprintf(stderr, "dri_create_context: glthread isn't thread safe "
 209                   "- missing call XInitThreads\n");
 210       } else {
 211          fprintf(stderr, "dri_create_context: requested glthread but driver "
 212                "is missing backgroundCallable V2 extension\n");
 213       }
 214    }
 215
 216    *error = __DRI_CTX_ERROR_SUCCESS;
 217    return GL_TRUE;
 218
 219  fail:
 220    if (ctx && ctx->st)
 221       ctx->st->destroy(ctx->st);
 222
 223    free(ctx);
 224    return GL_FALSE;
 225 }
 226
 227 void
 228 dri_destroy_context(__DRIcontext * cPriv)
 229 {
 230    struct dri_context *ctx = dri_context(cPriv);
 231
 232    if (ctx->hud) {
 233       hud_destroy(ctx->hud, ctx->st->cso_context);
 234    }
 235
 236    if (ctx->pp)
 237       pp_free(ctx->pp);
 238
 239    /* No particular reason to wait for command completion before
 240     * destroying a context, but we flush the context here
 241     * to avoid having to add code elsewhere to cope with flushing a
 242     * partially destroyed context.
 243     */
 244    ctx->st->flush(ctx->st, 0, NULL, NULL, NULL);
 245    ctx->st->destroy(ctx->st);
 246    free(ctx);
 247 }
 248
 249 /* This is called inside MakeCurrent to unbind the context. */
 250 GLboolean
 251 dri_unbind_context(__DRIcontext * cPriv)
 252 {
 253    /* dri_util.c ensures cPriv is not null */
 254    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 255    struct dri_context *ctx = dri_context(cPriv);
 256    struct st_context_iface *st = ctx->st;
 257    struct st_api *stapi = screen->st_api;
 258
 259    if (--ctx->bind_count == 0) {
 260       if (st == stapi->get_current(stapi)) {
 261          if (st->thread_finish)
 262             st->thread_finish(st);
 263
 264          /* Record HUD queries for the duration the context was "current". */
 265          if (ctx->hud)
 266             hud_record_only(ctx->hud, st->pipe);
 267
 268          stapi->make_current(stapi, NULL, NULL, NULL);
 269       }
 270    }
 271
 272    return GL_TRUE;
 273 }
 274
 275 GLboolean
 276 dri_make_current(__DRIcontext * cPriv,
 277                  __DRIdrawable * driDrawPriv,
 278                  __DRIdrawable * driReadPriv)
 279 {
 280    /* dri_util.c ensures cPriv is not null */
 281    struct dri_context *ctx = dri_context(cPriv);
 282    struct dri_drawable *draw = dri_drawable(driDrawPriv);
 283    struct dri_drawable *read = dri_drawable(driReadPriv);
 284
 285    ++ctx->bind_count;
 286
 287    if (!draw && !read)
 288       return ctx->stapi->make_current(ctx->stapi, ctx->st, NULL, NULL);
 289    else if (!draw || !read)
 290       return GL_FALSE;
 291
 292    if (ctx->dPriv != driDrawPriv) {
 293       ctx->dPriv = driDrawPriv;
 294       draw->texture_stamp = driDrawPriv->lastStamp - 1;
 295    }
 296    if (ctx->rPriv != driReadPriv) {
 297       ctx->rPriv = driReadPriv;
 298       read->texture_stamp = driReadPriv->lastStamp - 1;
 299    }
 300
 301    ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
 302
 303    /* This is ok to call here. If they are already init, it's a no-op. */
 304    if (ctx->pp && draw->textures[ST_ATTACHMENT_BACK_LEFT])
 305       pp_init_fbos(ctx->pp, draw->textures[ST_ATTACHMENT_BACK_LEFT]->width0,
 306                    draw->textures[ST_ATTACHMENT_BACK_LEFT]->height0);
 307
 308    return GL_TRUE;
 309 }
 310
 311 struct dri_context *
 312 dri_get_current(__DRIscreen *sPriv)
 313 {
 314    struct dri_screen *screen = dri_screen(sPriv);
 315    struct st_api *stapi = screen->st_api;
 316    struct st_context_iface *st;
 317
 318    st = stapi->get_current(stapi);
 319
 320    return (struct dri_context *) st ? st->st_manager_private : NULL;
 321 }
 322
 323 /* vim: set sw=3 ts=8 sts=3 expandtab: */