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,
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  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    struct st_api *stapi = dri_get_st_api();
  57    __DRIscreen *sPriv = cPriv->driScreenPriv;
  58    struct dri_screen *screen = dri_screen(sPriv);
  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->smapi, &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 st_api *stapi = dri_get_st_api();
 123
 124    if (cPriv) {
 125       struct dri_context *ctx = dri_context(cPriv);
 126
 127       if (--ctx->bind_count == 0) {
 128          if (ctx->st == stapi->get_current(stapi)) {
 129             ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 130             stapi->make_current(stapi, NULL, NULL, NULL);
 131          }
 132       }
 133    }
 134
 135    return GL_TRUE;
 136 }
 137
 138 GLboolean
 139 dri_make_current(__DRIcontext * cPriv,
 140                  __DRIdrawable * driDrawPriv,
 141                  __DRIdrawable * driReadPriv)
 142 {
 143    struct st_api *stapi = dri_get_st_api();
 144
 145    if (cPriv) {
 146       struct dri_context *ctx = dri_context(cPriv);
 147       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 148       struct dri_drawable *read = dri_drawable(driReadPriv);
 149       struct st_context_iface *old_st;
 150
 151       old_st = stapi->get_current(stapi);
 152       if (old_st && old_st != ctx->st)
 153          ctx->st->flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 154
 155       ++ctx->bind_count;
 156
 157       if (ctx->dPriv != driDrawPriv) {
 158          ctx->dPriv = driDrawPriv;
 159          draw->texture_stamp = driDrawPriv->lastStamp - 1;
 160       }
 161       if (ctx->rPriv != driReadPriv) {
 162          ctx->rPriv = driReadPriv;
 163          read->texture_stamp = driReadPriv->lastStamp - 1;
 164       }
 165
 166       stapi->make_current(stapi, ctx->st, draw->stfb, read->stfb);
 167    }
 168    else {
 169       stapi->make_current(stapi, NULL, NULL, NULL);
 170    }
 171
 172    return GL_TRUE;
 173 }
 174
 175 struct dri_context *
 176 dri_get_current(void)
 177 {
 178    struct st_api *stapi = dri_get_st_api();
 179    struct st_context_iface *st;
 180
 181    st = stapi->get_current(stapi);
 182
 183    return (struct dri_context *) (st) ? st->st_manager_private : NULL;
 184 }
 185
 186 /* vim: set sw=3 ts=8 sts=3 expandtab: */