src/gallium/frontends/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 "frontend/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 #include "util/u_memory.h"
  44
  45 GLboolean
  46 dri_create_context(gl_api api, const struct gl_config * visual,
  47                    __DRIcontext * cPriv,
  48                    const struct __DriverContextConfig *ctx_config,
  49                    unsigned *error,
  50                    void *sharedContextPrivate)
  51 {
  52    __DRIscreen *sPriv = cPriv->driScreenPriv;
  53    struct dri_screen *screen = dri_screen(sPriv);
  54    struct st_api *stapi = screen->st_api;
  55    struct dri_context *ctx = NULL;
  56    struct st_context_iface *st_share = NULL;
  57    struct st_context_attribs attribs;
  58    enum st_context_error ctx_err = 0;
  59    unsigned allowed_flags = __DRI_CTX_FLAG_DEBUG |
  60                             __DRI_CTX_FLAG_FORWARD_COMPATIBLE |
  61                             __DRI_CTX_FLAG_NO_ERROR;
  62    unsigned allowed_attribs =
  63       __DRIVER_CONTEXT_ATTRIB_PRIORITY |
  64       __DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR;
  65    const __DRIbackgroundCallableExtension *backgroundCallable =
  66       screen->sPriv->dri2.backgroundCallable;
  67    const struct driOptionCache *optionCache = &screen->dev->option_cache;
  68
  69    if (screen->has_reset_status_query) {
  70       allowed_flags |= __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS;
  71       allowed_attribs |= __DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY;
  72    }
  73
  74    if (ctx_config->flags & ~allowed_flags) {
  75       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
  76       goto fail;
  77    }
  78
  79    if (ctx_config->attribute_mask & ~allowed_attribs) {
  80       *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
  81       goto fail;
  82    }
  83
  84    memset(&attribs, 0, sizeof(attribs));
  85    switch (api) {
  86    case API_OPENGLES:
  87       attribs.profile = ST_PROFILE_OPENGL_ES1;
  88       break;
  89    case API_OPENGLES2:
  90       attribs.profile = ST_PROFILE_OPENGL_ES2;
  91       break;
  92    case API_OPENGL_COMPAT:
  93    case API_OPENGL_CORE:
  94       if (driQueryOptionb(optionCache, "force_compat_profile")) {
  95          attribs.profile = ST_PROFILE_DEFAULT;
  96       } else {
  97          attribs.profile = api == API_OPENGL_COMPAT ? ST_PROFILE_DEFAULT
  98                                                     : ST_PROFILE_OPENGL_CORE;
  99       }
 100
 101       attribs.major = ctx_config->major_version;
 102       attribs.minor = ctx_config->minor_version;
 103
 104       if ((ctx_config->flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 105          attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
 106       break;
 107    default:
 108       *error = __DRI_CTX_ERROR_BAD_API;
 109       goto fail;
 110    }
 111
 112    if ((ctx_config->flags & __DRI_CTX_FLAG_DEBUG) != 0)
 113       attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
 114
 115    if (ctx_config->flags & __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)
 116       attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
 117
 118    if (ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY)
 119       if (ctx_config->reset_strategy != __DRI_CTX_RESET_NO_NOTIFICATION)
 120          attribs.flags |= ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED;
 121
 122    if (ctx_config->flags & __DRI_CTX_FLAG_NO_ERROR)
 123       attribs.flags |= ST_CONTEXT_FLAG_NO_ERROR;
 124
 125    if (ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_PRIORITY) {
 126       switch (ctx_config->priority) {
 127       case __DRI_CTX_PRIORITY_LOW:
 128          attribs.flags |= ST_CONTEXT_FLAG_LOW_PRIORITY;
 129          break;
 130       case __DRI_CTX_PRIORITY_HIGH:
 131          attribs.flags |= ST_CONTEXT_FLAG_HIGH_PRIORITY;
 132          break;
 133       default:
 134          break;
 135       }
 136    }
 137
 138    if ((ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR)
 139        && (ctx_config->release_behavior == __DRI_CTX_RELEASE_BEHAVIOR_NONE))
 140       attribs.flags |= ST_CONTEXT_FLAG_RELEASE_NONE;
 141
 142    struct dri_context *share_ctx = NULL;
 143    if (sharedContextPrivate) {
 144       share_ctx = (struct dri_context *)sharedContextPrivate;
 145       st_share = share_ctx->st;
 146    }
 147
 148    ctx = CALLOC_STRUCT(dri_context);
 149    if (ctx == NULL) {
 150       *error = __DRI_CTX_ERROR_NO_MEMORY;
 151       goto fail;
 152    }
 153
 154    cPriv->driverPrivate = ctx;
 155    ctx->cPriv = cPriv;
 156    ctx->sPriv = sPriv;
 157
 158    if (driQueryOptionb(&screen->dev->option_cache, "mesa_no_error"))
 159       attribs.flags |= ST_CONTEXT_FLAG_NO_ERROR;
 160
 161    attribs.options = screen->options;
 162    dri_fill_st_visual(&attribs.visual, screen, visual);
 163    ctx->st = stapi->create_context(stapi, &screen->base, &attribs, &ctx_err,
 164                                    st_share);
 165    if (ctx->st == NULL) {
 166       switch (ctx_err) {
 167       case ST_CONTEXT_SUCCESS:
 168          *error = __DRI_CTX_ERROR_SUCCESS;
 169          break;
 170       case ST_CONTEXT_ERROR_NO_MEMORY:
 171          *error = __DRI_CTX_ERROR_NO_MEMORY;
 172          break;
 173       case ST_CONTEXT_ERROR_BAD_API:
 174          *error = __DRI_CTX_ERROR_BAD_API;
 175          break;
 176       case ST_CONTEXT_ERROR_BAD_VERSION:
 177          *error = __DRI_CTX_ERROR_BAD_VERSION;
 178          break;
 179       case ST_CONTEXT_ERROR_BAD_FLAG:
 180          *error = __DRI_CTX_ERROR_BAD_FLAG;
 181          break;
 182       case ST_CONTEXT_ERROR_UNKNOWN_ATTRIBUTE:
 183          *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 184          break;
 185       case ST_CONTEXT_ERROR_UNKNOWN_FLAG:
 186          *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 187          break;
 188       }
 189       goto fail;
 190    }
 191    ctx->st->st_manager_private = (void *) ctx;
 192    ctx->stapi = stapi;
 193
 194    if (ctx->st->cso_context) {
 195       ctx->pp = pp_init(ctx->st->pipe, screen->pp_enabled, ctx->st->cso_context);
 196       ctx->hud = hud_create(ctx->st->cso_context,
 197                             share_ctx ? share_ctx->hud : NULL);
 198    }
 199
 200    /* Do this last. */
 201    if (ctx->st->start_thread &&
 202          driQueryOptionb(&screen->dev->option_cache, "mesa_glthread")) {
 203
 204       if (backgroundCallable && backgroundCallable->base.version >= 2 &&
 205             backgroundCallable->isThreadSafe) {
 206
 207          if (backgroundCallable->isThreadSafe(cPriv->loaderPrivate))
 208             ctx->st->start_thread(ctx->st);
 209          else
 210             fprintf(stderr, "dri_create_context: glthread isn't thread safe "
 211                   "- missing call XInitThreads\n");
 212       } else {
 213          fprintf(stderr, "dri_create_context: requested glthread but driver "
 214                "is missing backgroundCallable V2 extension\n");
 215       }
 216    }
 217
 218    *error = __DRI_CTX_ERROR_SUCCESS;
 219    return GL_TRUE;
 220
 221  fail:
 222    if (ctx && ctx->st)
 223       ctx->st->destroy(ctx->st);
 224
 225    free(ctx);
 226    return GL_FALSE;
 227 }
 228
 229 void
 230 dri_destroy_context(__DRIcontext * cPriv)
 231 {
 232    struct dri_context *ctx = dri_context(cPriv);
 233
 234    if (ctx->hud) {
 235       hud_destroy(ctx->hud, ctx->st->cso_context);
 236    }
 237
 238    if (ctx->pp)
 239       pp_free(ctx->pp);
 240
 241    /* No particular reason to wait for command completion before
 242     * destroying a context, but we flush the context here
 243     * to avoid having to add code elsewhere to cope with flushing a
 244     * partially destroyed context.
 245     */
 246    ctx->st->flush(ctx->st, 0, NULL, NULL, NULL);
 247    ctx->st->destroy(ctx->st);
 248    free(ctx);
 249 }
 250
 251 /* This is called inside MakeCurrent to unbind the context. */
 252 GLboolean
 253 dri_unbind_context(__DRIcontext * cPriv)
 254 {
 255    /* dri_util.c ensures cPriv is not null */
 256    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 257    struct dri_context *ctx = dri_context(cPriv);
 258    struct st_context_iface *st = ctx->st;
 259    struct st_api *stapi = screen->st_api;
 260
 261    if (--ctx->bind_count == 0) {
 262       if (st == stapi->get_current(stapi)) {
 263          if (st->thread_finish)
 264             st->thread_finish(st);
 265
 266          /* Record HUD queries for the duration the context was "current". */
 267          if (ctx->hud)
 268             hud_record_only(ctx->hud, st->pipe);
 269
 270          stapi->make_current(stapi, NULL, NULL, NULL);
 271       }
 272    }
 273
 274    return GL_TRUE;
 275 }
 276
 277 GLboolean
 278 dri_make_current(__DRIcontext * cPriv,
 279                  __DRIdrawable * driDrawPriv,
 280                  __DRIdrawable * driReadPriv)
 281 {
 282    /* dri_util.c ensures cPriv is not null */
 283    struct dri_context *ctx = dri_context(cPriv);
 284    struct dri_drawable *draw = dri_drawable(driDrawPriv);
 285    struct dri_drawable *read = dri_drawable(driReadPriv);
 286
 287    ++ctx->bind_count;
 288
 289    if (!draw && !read)
 290       return ctx->stapi->make_current(ctx->stapi, ctx->st, NULL, NULL);
 291    else if (!draw || !read)
 292       return GL_FALSE;
 293
 294    if (ctx->dPriv != driDrawPriv) {
 295       ctx->dPriv = driDrawPriv;
 296       draw->texture_stamp = driDrawPriv->lastStamp - 1;
 297    }
 298    if (ctx->rPriv != driReadPriv) {
 299       ctx->rPriv = driReadPriv;
 300       read->texture_stamp = driReadPriv->lastStamp - 1;
 301    }
 302
 303    ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
 304
 305    /* This is ok to call here. If they are already init, it's a no-op. */
 306    if (ctx->pp && draw->textures[ST_ATTACHMENT_BACK_LEFT])
 307       pp_init_fbos(ctx->pp, draw->textures[ST_ATTACHMENT_BACK_LEFT]->width0,
 308                    draw->textures[ST_ATTACHMENT_BACK_LEFT]->height0);
 309
 310    return GL_TRUE;
 311 }
 312
 313 struct dri_context *
 314 dri_get_current(__DRIscreen *sPriv)
 315 {
 316    struct dri_screen *screen = dri_screen(sPriv);
 317    struct st_api *stapi = screen->st_api;
 318    struct st_context_iface *st;
 319
 320    st = stapi->get_current(stapi);
 321
 322    return (struct dri_context *) st ? st->st_manager_private : NULL;
 323 }
 324
 325 /* vim: set sw=3 ts=8 sts=3 expandtab: */