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
  34 #include "dri_drawable.h"
  35 #include "state_tracker/drm_api.h"
  36 #include "state_tracker/dri1_api.h"
  37 #include "state_tracker/st_public.h"
  38 #include "state_tracker/st_context.h"
  39 #include "pipe/p_context.h"
  40
  41 #include "dri_context.h"
  42
  43 #include "util/u_memory.h"
  44
  45 GLboolean
  46 dri_create_context(const __GLcontextModes * visual,
  47                    __DRIcontext * cPriv, void *sharedContextPrivate)
  48 {
  49    __DRIscreen *sPriv = cPriv->driScreenPriv;
  50    struct dri_screen *screen = dri_screen(sPriv);
  51    struct dri_context *ctx = NULL;
  52    struct st_context *st_share = NULL;
  53
  54    if (sharedContextPrivate) {
  55       st_share = ((struct dri_context *)sharedContextPrivate)->st;
  56    }
  57
  58    ctx = CALLOC_STRUCT(dri_context);
  59    if (ctx == NULL)
  60       goto fail;
  61
  62    cPriv->driverPrivate = ctx;
  63    ctx->cPriv = cPriv;
  64    ctx->sPriv = sPriv;
  65    ctx->lock = screen->drmLock;
  66    ctx->d_stamp = -1;
  67    ctx->r_stamp = -1;
  68
  69    driParseConfigFiles(&ctx->optionCache,
  70                        &screen->optionCache, sPriv->myNum, "dri");
  71
  72    ctx->pipe = screen->api->create_context(screen->api, screen->pipe_screen);
  73
  74    if (ctx->pipe == NULL)
  75       goto fail;
  76
  77    /* used in dri_flush_frontbuffer */
  78    ctx->pipe->priv = ctx;
  79
  80    ctx->st = st_create_context(ctx->pipe, visual, st_share);
  81    if (ctx->st == NULL)
  82       goto fail;
  83
  84    dri_init_extensions(ctx);
  85
  86    return GL_TRUE;
  87
  88  fail:
  89    if (ctx && ctx->st)
  90       st_destroy_context(ctx->st);
  91
  92    if (ctx && ctx->pipe)
  93       ctx->pipe->destroy(ctx->pipe);
  94
  95    FREE(ctx);
  96    return FALSE;
  97 }
  98
  99 void
 100 dri_destroy_context(__DRIcontext * cPriv)
 101 {
 102    struct dri_context *ctx = dri_context(cPriv);
 103
 104    /* note: we are freeing values and nothing more because
 105     * driParseConfigFiles allocated values only - the rest
 106     * is owned by screen optionCache.
 107     */
 108    FREE(ctx->optionCache.values);
 109
 110    /* No particular reason to wait for command completion before
 111     * destroying a context, but it is probably worthwhile flushing it
 112     * to avoid having to add code elsewhere to cope with flushing a
 113     * partially destroyed context.
 114     */
 115    st_flush(ctx->st, 0, NULL);
 116
 117    /* Also frees ctx->pipe?
 118     */
 119    st_destroy_context(ctx->st);
 120
 121    FREE(ctx);
 122 }
 123
 124 GLboolean
 125 dri_unbind_context(__DRIcontext * cPriv)
 126 {
 127    if (cPriv) {
 128       struct dri_context *ctx = dri_context(cPriv);
 129
 130       if (--ctx->bind_count == 0) {
 131          if (ctx->st && ctx->st == st_get_current()) {
 132             st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 133             st_make_current(NULL, NULL, NULL);
 134          }
 135       }
 136    }
 137
 138    return GL_TRUE;
 139 }
 140
 141 GLboolean
 142 dri_make_current(__DRIcontext * cPriv,
 143                  __DRIdrawable * driDrawPriv,
 144                  __DRIdrawable * driReadPriv)
 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 *old_st = st_get_current();
 151
 152       if (old_st && old_st != ctx->st)
 153          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          ctx->d_stamp = driDrawPriv->lastStamp - 1;
 160       }
 161       if (ctx->rPriv != driReadPriv) {
 162          ctx->rPriv = driReadPriv;
 163          ctx->r_stamp = driReadPriv->lastStamp - 1;
 164       }
 165
 166       st_make_current(ctx->st, draw->stfb, read->stfb);
 167
 168       if (__dri1_api_hooks) {
 169          dri1_update_drawables(ctx, draw, read);
 170       } else {
 171          if (driDrawPriv)
 172             dri_get_buffers(driDrawPriv);
 173          if (driDrawPriv != driReadPriv && driReadPriv)
 174             dri_get_buffers(driReadPriv);
 175       }
 176    } else {
 177       st_make_current(NULL, NULL, NULL);
 178    }
 179
 180    return GL_TRUE;
 181 }
 182
 183 static void
 184 st_dri_lock(struct pipe_context *pipe)
 185 {
 186    dri_lock((struct dri_context *)pipe->priv);
 187 }
 188
 189 static void
 190 st_dri_unlock(struct pipe_context *pipe)
 191 {
 192    dri_unlock((struct dri_context *)pipe->priv);
 193 }
 194
 195 static boolean
 196 st_dri_is_locked(struct pipe_context *pipe)
 197 {
 198    return ((struct dri_context *)pipe->priv)->isLocked;
 199 }
 200
 201 static boolean
 202 st_dri_lost_lock(struct pipe_context *pipe)
 203 {
 204    return ((struct dri_context *)pipe->priv)->wsLostLock;
 205 }
 206
 207 static void
 208 st_dri_clear_lost_lock(struct pipe_context *pipe)
 209 {
 210    ((struct dri_context *)pipe->priv)->wsLostLock = FALSE;
 211 }
 212
 213 struct dri1_api_lock_funcs dri1_lf = {
 214    .lock = st_dri_lock,
 215    .unlock = st_dri_unlock,
 216    .is_locked = st_dri_is_locked,
 217    .is_lock_lost = st_dri_lost_lock,
 218    .clear_lost_lock = st_dri_clear_lost_lock
 219 };
 220
 221 /* vim: set sw=3 ts=8 sts=3 expandtab: */