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