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