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 "state_tracker/st_context.h"
  41
  42 GLboolean
  43 dri_create_context(gl_api api, const struct gl_config * visual,
  44                    __DRIcontext * cPriv,
  45                    unsigned major_version,
  46                    unsigned minor_version,
  47                    uint32_t flags,
  48                    bool notify_reset,
  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
  62    if (screen->has_reset_status_query)
  63       allowed_flags |= __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS;
  64
  65    if (flags & ~allowed_flags) {
  66       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
  67       goto fail;
  68    }
  69
  70    if (!screen->has_reset_status_query && notify_reset) {
  71       *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
  72       goto fail;
  73    }
  74
  75    memset(&attribs, 0, sizeof(attribs));
  76    switch (api) {
  77    case API_OPENGLES:
  78       attribs.profile = ST_PROFILE_OPENGL_ES1;
  79       break;
  80    case API_OPENGLES2:
  81       attribs.profile = ST_PROFILE_OPENGL_ES2;
  82       break;
  83    case API_OPENGL_COMPAT:
  84    case API_OPENGL_CORE:
  85       attribs.profile = api == API_OPENGL_COMPAT ? ST_PROFILE_DEFAULT
  86                                                  : ST_PROFILE_OPENGL_CORE;
  87       attribs.major = major_version;
  88       attribs.minor = minor_version;
  89
  90       if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
  91          attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
  92       break;
  93    default:
  94       *error = __DRI_CTX_ERROR_BAD_API;
  95       goto fail;
  96    }
  97
  98    if ((flags & __DRI_CTX_FLAG_DEBUG) != 0)
  99       attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
 100
 101    if (flags & __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)
 102       attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
 103
 104    if (notify_reset)
 105       attribs.flags |= ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED;
 106
 107    if (sharedContextPrivate) {
 108       st_share = ((struct dri_context *)sharedContextPrivate)->st;
 109    }
 110
 111    ctx = CALLOC_STRUCT(dri_context);
 112    if (ctx == NULL) {
 113       *error = __DRI_CTX_ERROR_NO_MEMORY;
 114       goto fail;
 115    }
 116
 117    cPriv->driverPrivate = ctx;
 118    ctx->cPriv = cPriv;
 119    ctx->sPriv = sPriv;
 120
 121    attribs.options = screen->options;
 122    dri_fill_st_visual(&attribs.visual, screen, visual);
 123    ctx->st = stapi->create_context(stapi, &screen->base, &attribs, &ctx_err,
 124                                    st_share);
 125    if (ctx->st == NULL) {
 126       switch (ctx_err) {
 127       case ST_CONTEXT_SUCCESS:
 128          *error = __DRI_CTX_ERROR_SUCCESS;
 129          break;
 130       case ST_CONTEXT_ERROR_NO_MEMORY:
 131          *error = __DRI_CTX_ERROR_NO_MEMORY;
 132          break;
 133       case ST_CONTEXT_ERROR_BAD_API:
 134          *error = __DRI_CTX_ERROR_BAD_API;
 135          break;
 136       case ST_CONTEXT_ERROR_BAD_VERSION:
 137          *error = __DRI_CTX_ERROR_BAD_VERSION;
 138          break;
 139       case ST_CONTEXT_ERROR_BAD_FLAG:
 140          *error = __DRI_CTX_ERROR_BAD_FLAG;
 141          break;
 142       case ST_CONTEXT_ERROR_UNKNOWN_ATTRIBUTE:
 143          *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 144          break;
 145       case ST_CONTEXT_ERROR_UNKNOWN_FLAG:
 146          *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 147          break;
 148       }
 149       goto fail;
 150    }
 151    ctx->st->st_manager_private = (void *) ctx;
 152    ctx->stapi = stapi;
 153
 154    if (ctx->st->cso_context) {
 155       ctx->pp = pp_init(ctx->st->pipe, screen->pp_enabled, ctx->st->cso_context);
 156       ctx->hud = hud_create(ctx->st->pipe, ctx->st->cso_context);
 157    }
 158
 159    *error = __DRI_CTX_ERROR_SUCCESS;
 160    return GL_TRUE;
 161
 162  fail:
 163    if (ctx && ctx->st)
 164       ctx->st->destroy(ctx->st);
 165
 166    free(ctx);
 167    return GL_FALSE;
 168 }
 169
 170 void
 171 dri_destroy_context(__DRIcontext * cPriv)
 172 {
 173    struct dri_context *ctx = dri_context(cPriv);
 174
 175    if (ctx->hud) {
 176       hud_destroy(ctx->hud);
 177    }
 178
 179    if (ctx->pp)
 180       pp_free(ctx->pp);
 181
 182    /* No particular reason to wait for command completion before
 183     * destroying a context, but we flush the context here
 184     * to avoid having to add code elsewhere to cope with flushing a
 185     * partially destroyed context.
 186     */
 187    ctx->st->flush(ctx->st, 0, NULL);
 188    ctx->st->destroy(ctx->st);
 189    free(ctx);
 190 }
 191
 192 GLboolean
 193 dri_unbind_context(__DRIcontext * cPriv)
 194 {
 195    /* dri_util.c ensures cPriv is not null */
 196    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 197    struct dri_context *ctx = dri_context(cPriv);
 198    struct st_api *stapi = screen->st_api;
 199
 200    if (--ctx->bind_count == 0) {
 201       if (ctx->st == ctx->stapi->get_current(ctx->stapi)) {
 202          /* For conformance, unbind is supposed to flush the context.
 203           * However, if we do it here we might end up flushing a partially
 204           * destroyed context. Instead, we flush in dri_make_current and
 205           * in dri_destroy_context which should cover all the cases.
 206           */
 207          stapi->make_current(stapi, NULL, NULL, NULL);
 208       }
 209    }
 210
 211    return GL_TRUE;
 212 }
 213
 214 GLboolean
 215 dri_make_current(__DRIcontext * cPriv,
 216                  __DRIdrawable * driDrawPriv,
 217                  __DRIdrawable * driReadPriv)
 218 {
 219    /* dri_util.c ensures cPriv is not null */
 220    struct dri_context *ctx = dri_context(cPriv);
 221    struct dri_drawable *draw = dri_drawable(driDrawPriv);
 222    struct dri_drawable *read = dri_drawable(driReadPriv);
 223    struct st_context_iface *old_st = ctx->stapi->get_current(ctx->stapi);
 224
 225    /* Flush the old context here so we don't have to flush on unbind() */
 226    if (old_st && old_st != ctx->st)
 227       old_st->flush(old_st, ST_FLUSH_FRONT, NULL);
 228
 229    ++ctx->bind_count;
 230
 231    if (!draw && !read)
 232       return ctx->stapi->make_current(ctx->stapi, ctx->st, NULL, NULL);
 233    else if (!draw || !read)
 234       return GL_FALSE;
 235
 236    if (ctx->dPriv != driDrawPriv) {
 237       ctx->dPriv = driDrawPriv;
 238       draw->texture_stamp = driDrawPriv->lastStamp - 1;
 239    }
 240    if (ctx->rPriv != driReadPriv) {
 241       ctx->rPriv = driReadPriv;
 242       read->texture_stamp = driReadPriv->lastStamp - 1;
 243    }
 244
 245    ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
 246
 247    /* This is ok to call here. If they are already init, it's a no-op. */
 248    if (ctx->pp && draw->textures[ST_ATTACHMENT_BACK_LEFT])
 249       pp_init_fbos(ctx->pp, draw->textures[ST_ATTACHMENT_BACK_LEFT]->width0,
 250                    draw->textures[ST_ATTACHMENT_BACK_LEFT]->height0);
 251
 252    return GL_TRUE;
 253 }
 254
 255 struct dri_context *
 256 dri_get_current(__DRIscreen *sPriv)
 257 {
 258    struct dri_screen *screen = dri_screen(sPriv);
 259    struct st_api *stapi = screen->st_api;
 260    struct st_context_iface *st;
 261
 262    st = stapi->get_current(stapi);
 263
 264    return (struct dri_context *) st ? st->st_manager_private : NULL;
 265 }
 266
 267 /* vim: set sw=3 ts=8 sts=3 expandtab: */