src/gallium/state_trackers/dri/common/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
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  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 "dri_st_api.h"
  38
  39 #include "pipe/p_context.h"
  40 #include "state_tracker/st_context.h"
  41
  42 static void
  43 dri_init_extensions(struct dri_context *ctx)
  44 {
  45    struct st_context *st = (struct st_context *) ctx->st;
  46
  47    /* New extensions should be added in mesa/state_tracker/st_extensions.c
  48     * and not in this file. */
  49    driInitExtensions(st->ctx, NULL, GL_FALSE);
  50 }
  51
  52 GLboolean
  53 dri_create_context(const __GLcontextModes * visual,
  54                    __DRIcontext * cPriv, void *sharedContextPrivate)
  55 {
  56    __DRIscreen *sPriv = cPriv->driScreenPriv;
  57    struct dri_screen *screen = dri_screen(sPriv);
  58    struct st_api *stapi = screen->st_api;
  59    struct dri_context *ctx = NULL;
  60    struct st_context_iface *st_share = NULL;
  61    struct st_visual stvis;
  62
  63    if (sharedContextPrivate) {
  64       st_share = ((struct dri_context *)sharedContextPrivate)->st;
  65    }
  66
  67    ctx = CALLOC_STRUCT(dri_context);
  68    if (ctx == NULL)
  69       goto fail;
  70
  71    cPriv->driverPrivate = ctx;
  72    ctx->cPriv = cPriv;
  73    ctx->sPriv = sPriv;
  74    ctx->lock = screen->drmLock;
  75
  76    driParseConfigFiles(&ctx->optionCache,
  77                        &screen->optionCache, sPriv->myNum, "dri");
  78
  79    dri_fill_st_visual(&stvis, screen, visual);
  80    ctx->st = stapi->create_context(stapi, &screen->base, &stvis, st_share);
  81    if (ctx->st == NULL)
  82       goto fail;
  83    ctx->st->st_manager_private = (void *) ctx;
  84
  85    dri_init_extensions(ctx);
  86
  87    return GL_TRUE;
  88
  89  fail:
  90    if (ctx && ctx->st)
  91       ctx->st->destroy(ctx->st);
  92
  93    FREE(ctx);
  94    return FALSE;
  95 }
  96
  97 void
  98 dri_destroy_context(__DRIcontext * cPriv)
  99 {
 100    struct dri_context *ctx = dri_context(cPriv);
 101
 102    /* note: we are freeing values and nothing more because
 103     * driParseConfigFiles allocated values only - the rest
 104     * is owned by screen optionCache.
 105     */
 106    FREE(ctx->optionCache.values);
 107
 108    /* No particular reason to wait for command completion before
 109     * destroying a context, but it is probably worthwhile flushing it
 110     * to avoid having to add code elsewhere to cope with flushing a
 111     * partially destroyed context.
 112     */
 113    ctx->st->flush(ctx->st, 0, NULL);
 114    ctx->st->destroy(ctx->st);
 115
 116    FREE(ctx);
 117 }
 118
 119 GLboolean
 120 dri_unbind_context(__DRIcontext * cPriv)
 121 {
 122    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 123    struct st_api *stapi = screen->st_api;
 124
 125    if (cPriv) {
 126       struct dri_context *ctx = dri_context(cPriv);
 127
 128       if (--ctx->bind_count == 0) {
 129          if (ctx->st == stapi->get_current(stapi)) {
 130             ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 131             stapi->make_current(stapi, NULL, NULL, NULL);
 132          }
 133       }
 134    }
 135
 136    return GL_TRUE;
 137 }
 138
 139 GLboolean
 140 dri_make_current(__DRIcontext * cPriv,
 141                  __DRIdrawable * driDrawPriv,
 142                  __DRIdrawable * driReadPriv)
 143 {
 144    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 145    struct st_api *stapi = screen->st_api;
 146
 147    if (cPriv) {
 148       struct dri_context *ctx = dri_context(cPriv);
 149       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 150       struct dri_drawable *read = dri_drawable(driReadPriv);
 151       struct st_context_iface *old_st;
 152
 153       old_st = stapi->get_current(stapi);
 154       if (old_st && old_st != ctx->st)
 155          ctx->st->flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 156
 157       ++ctx->bind_count;
 158
 159       if (ctx->dPriv != driDrawPriv) {
 160          ctx->dPriv = driDrawPriv;
 161          draw->texture_stamp = driDrawPriv->lastStamp - 1;
 162       }
 163       if (ctx->rPriv != driReadPriv) {
 164          ctx->rPriv = driReadPriv;
 165          read->texture_stamp = driReadPriv->lastStamp - 1;
 166       }
 167
 168       stapi->make_current(stapi, ctx->st, &draw->base, &read->base);
 169    }
 170    else {
 171       stapi->make_current(stapi, NULL, NULL, NULL);
 172    }
 173
 174    return GL_TRUE;
 175 }
 176
 177 struct dri_context *
 178 dri_get_current(__DRIscreen *sPriv)
 179 {
 180    struct dri_screen *screen = dri_screen(sPriv);
 181    struct st_api *stapi = screen->st_api;
 182    struct st_context_iface *st;
 183
 184    st = stapi->get_current(stapi);
 185
 186    return (struct dri_context *) (st) ? st->st_manager_private : NULL;
 187 }
 188
 189 /* vim: set sw=3 ts=8 sts=3 expandtab: */