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 "dri_screen.h"
  33 #include "dri_drawable.h"
  34 #include "dri_context.h"
  35 #include "dri_st_api.h"
  36
  37 #include "pipe/p_context.h"
  38 #include "util/u_memory.h"
  39
  40 GLboolean
  41 dri_create_context(const __GLcontextModes * visual,
  42                    __DRIcontext * cPriv, void *sharedContextPrivate)
  43 {
  44    struct st_api *stapi = dri_get_st_api();
  45    __DRIscreen *sPriv = cPriv->driScreenPriv;
  46    struct dri_screen *screen = dri_screen(sPriv);
  47    struct dri_context *ctx = NULL;
  48    struct st_context_iface *st_share = NULL;
  49    struct st_visual stvis;
  50
  51    if (sharedContextPrivate) {
  52       st_share = ((struct dri_context *)sharedContextPrivate)->st;
  53    }
  54
  55    ctx = CALLOC_STRUCT(dri_context);
  56    if (ctx == NULL)
  57       goto fail;
  58
  59    cPriv->driverPrivate = ctx;
  60    ctx->cPriv = cPriv;
  61    ctx->sPriv = sPriv;
  62    ctx->lock = screen->drmLock;
  63
  64    driParseConfigFiles(&ctx->optionCache,
  65                        &screen->optionCache, sPriv->myNum, "dri");
  66
  67    dri_fill_st_visual(&stvis, screen, visual);
  68    ctx->st = stapi->create_context(stapi, screen->smapi, &stvis, st_share);
  69    if (ctx->st == NULL)
  70       goto fail;
  71    ctx->st->st_manager_private = (void *) ctx;
  72
  73    dri_init_extensions(ctx);
  74
  75    return GL_TRUE;
  76
  77  fail:
  78    if (ctx && ctx->st)
  79       ctx->st->destroy(ctx->st);
  80
  81    FREE(ctx);
  82    return FALSE;
  83 }
  84
  85 void
  86 dri_destroy_context(__DRIcontext * cPriv)
  87 {
  88    struct dri_context *ctx = dri_context(cPriv);
  89
  90    /* note: we are freeing values and nothing more because
  91     * driParseConfigFiles allocated values only - the rest
  92     * is owned by screen optionCache.
  93     */
  94    FREE(ctx->optionCache.values);
  95
  96    /* No particular reason to wait for command completion before
  97     * destroying a context, but it is probably worthwhile flushing it
  98     * to avoid having to add code elsewhere to cope with flushing a
  99     * partially destroyed context.
 100     */
 101    ctx->st->flush(ctx->st, 0, NULL);
 102    ctx->st->destroy(ctx->st);
 103
 104    FREE(ctx);
 105 }
 106
 107 GLboolean
 108 dri_unbind_context(__DRIcontext * cPriv)
 109 {
 110    struct st_api *stapi = dri_get_st_api();
 111
 112    if (cPriv) {
 113       struct dri_context *ctx = dri_context(cPriv);
 114
 115       if (--ctx->bind_count == 0) {
 116          if (ctx->st == stapi->get_current(stapi)) {
 117             ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 118             stapi->make_current(stapi, NULL, NULL, NULL);
 119          }
 120       }
 121    }
 122
 123    return GL_TRUE;
 124 }
 125
 126 GLboolean
 127 dri_make_current(__DRIcontext * cPriv,
 128                  __DRIdrawable * driDrawPriv,
 129                  __DRIdrawable * driReadPriv)
 130 {
 131    struct st_api *stapi = dri_get_st_api();
 132
 133    if (cPriv) {
 134       struct dri_context *ctx = dri_context(cPriv);
 135       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 136       struct dri_drawable *read = dri_drawable(driReadPriv);
 137       struct st_context_iface *old_st;
 138
 139       old_st = stapi->get_current(stapi);
 140       if (old_st && old_st != ctx->st)
 141          ctx->st->flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 142
 143       ++ctx->bind_count;
 144
 145       if (ctx->dPriv != driDrawPriv) {
 146          ctx->dPriv = driDrawPriv;
 147          draw->texture_stamp = driDrawPriv->lastStamp - 1;
 148       }
 149       if (ctx->rPriv != driReadPriv) {
 150          ctx->rPriv = driReadPriv;
 151          read->texture_stamp = driReadPriv->lastStamp - 1;
 152       }
 153
 154       stapi->make_current(stapi, ctx->st, draw->stfb, read->stfb);
 155    }
 156    else {
 157       stapi->make_current(stapi, NULL, NULL, NULL);
 158    }
 159
 160    return GL_TRUE;
 161 }
 162
 163 struct dri_context *
 164 dri_get_current(void)
 165 {
 166    struct st_api *stapi = dri_get_st_api();
 167    struct st_context_iface *st;
 168
 169    st = stapi->get_current(stapi);
 170
 171    return (struct dri_context *) (st) ? st->st_manager_private : NULL;
 172 }
 173
 174 /* vim: set sw=3 ts=8 sts=3 expandtab: */