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                    __DRIcontextPrivate * cPriv, void *sharedContextPrivate)
  48 {
  49    __DRIscreenPrivate *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(__DRIcontextPrivate * cPriv)
 101 {
 102    struct dri_context *ctx = dri_context(cPriv);
 103    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 104
 105    /* No particular reason to wait for command completion before
 106     * destroying a context, but it is probably worthwhile flushing it
 107     * to avoid having to add code elsewhere to cope with flushing a
 108     * partially destroyed context.
 109     */
 110    st_flush(ctx->st, 0, NULL);
 111
 112    if (screen->dummyContext == ctx)
 113       screen->dummyContext = NULL;
 114
 115    /* Also frees ctx->pipe?
 116     */
 117    st_destroy_context(ctx->st);
 118
 119    FREE(ctx);
 120 }
 121
 122 GLboolean
 123 dri_unbind_context(__DRIcontextPrivate * cPriv)
 124 {
 125    if (cPriv) {
 126       struct dri_context *ctx = dri_context(cPriv);
 127
 128       if (--ctx->bind_count == 0) {
 129          if (ctx->st && ctx->st == st_get_current()) {
 130             st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 131             st_make_current(NULL, NULL, NULL);
 132          }
 133       }
 134    }
 135
 136    return GL_TRUE;
 137 }
 138
 139 GLboolean
 140 dri_make_current(__DRIcontextPrivate * cPriv,
 141                  __DRIdrawablePrivate * driDrawPriv,
 142                  __DRIdrawablePrivate * driReadPriv)
 143 {
 144    if (cPriv) {
 145       struct dri_context *ctx = dri_context(cPriv);
 146       struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 147       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 148       struct dri_drawable *read = dri_drawable(driReadPriv);
 149       struct st_context *old_st = st_get_current();
 150
 151       if (old_st && old_st != ctx->st)
 152          st_flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 153
 154       ++ctx->bind_count;
 155
 156       /* This is for situations in which we need a rendering context but
 157        * there may not be any currently bound.
 158        */
 159       screen->dummyContext = ctx;
 160
 161       if (ctx->dPriv != driDrawPriv) {
 162          ctx->dPriv = driDrawPriv;
 163          ctx->d_stamp = driDrawPriv->lastStamp - 1;
 164       }
 165       if (ctx->rPriv != driReadPriv) {
 166          ctx->rPriv = driReadPriv;
 167          ctx->r_stamp = driReadPriv->lastStamp - 1;
 168       }
 169
 170       st_make_current(ctx->st, draw->stfb, read->stfb);
 171
 172       if (__dri1_api_hooks) {
 173          dri1_update_drawables(ctx, draw, read);
 174       } else {
 175          if (driDrawPriv)
 176             dri_get_buffers(driDrawPriv);
 177          if (driDrawPriv != driReadPriv && driReadPriv)
 178             dri_get_buffers(driReadPriv);
 179       }
 180    } else {
 181       st_make_current(NULL, NULL, NULL);
 182    }
 183
 184    return GL_TRUE;
 185 }
 186
 187 static void
 188 st_dri_lock(struct pipe_context *pipe)
 189 {
 190    dri_lock((struct dri_context *)pipe->priv);
 191 }
 192
 193 static void
 194 st_dri_unlock(struct pipe_context *pipe)
 195 {
 196    dri_unlock((struct dri_context *)pipe->priv);
 197 }
 198
 199 static boolean
 200 st_dri_is_locked(struct pipe_context *pipe)
 201 {
 202    return ((struct dri_context *)pipe->priv)->isLocked;
 203 }
 204
 205 static boolean
 206 st_dri_lost_lock(struct pipe_context *pipe)
 207 {
 208    return ((struct dri_context *)pipe->priv)->wsLostLock;
 209 }
 210
 211 static void
 212 st_dri_clear_lost_lock(struct pipe_context *pipe)
 213 {
 214    ((struct dri_context *)pipe->priv)->wsLostLock = FALSE;
 215 }
 216
 217 struct dri1_api_lock_funcs dri1_lf = {
 218    .lock = st_dri_lock,
 219    .unlock = st_dri_unlock,
 220    .is_locked = st_dri_is_locked,
 221    .is_lock_lost = st_dri_lost_lock,
 222    .clear_lost_lock = st_dri_clear_lost_lock
 223 };
 224
 225 /* vim: set sw=3 ts=8 sts=3 expandtab: */