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    /* Also frees ctx->pipe?
 113     */
 114    st_destroy_context(ctx->st);
 115
 116    FREE(ctx);
 117 }
 118
 119 GLboolean
 120 dri_unbind_context(__DRIcontextPrivate * cPriv)
 121 {
 122    if (cPriv) {
 123       struct dri_context *ctx = dri_context(cPriv);
 124
 125       if (--ctx->bind_count == 0) {
 126          if (ctx->st && ctx->st == st_get_current()) {
 127             st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 128             st_make_current(NULL, NULL, NULL);
 129          }
 130       }
 131    }
 132
 133    return GL_TRUE;
 134 }
 135
 136 GLboolean
 137 dri_make_current(__DRIcontextPrivate * cPriv,
 138                  __DRIdrawablePrivate * driDrawPriv,
 139                  __DRIdrawablePrivate * driReadPriv)
 140 {
 141    if (cPriv) {
 142       struct dri_context *ctx = dri_context(cPriv);
 143       struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 144       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 145       struct dri_drawable *read = dri_drawable(driReadPriv);
 146       struct st_context *old_st = st_get_current();
 147
 148       if (old_st && old_st != ctx->st)
 149          st_flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 150
 151       ++ctx->bind_count;
 152
 153       if (ctx->dPriv != driDrawPriv) {
 154          ctx->dPriv = driDrawPriv;
 155          ctx->d_stamp = driDrawPriv->lastStamp - 1;
 156       }
 157       if (ctx->rPriv != driReadPriv) {
 158          ctx->rPriv = driReadPriv;
 159          ctx->r_stamp = driReadPriv->lastStamp - 1;
 160       }
 161
 162       st_make_current(ctx->st, draw->stfb, read->stfb);
 163
 164       if (__dri1_api_hooks) {
 165          dri1_update_drawables(ctx, draw, read);
 166       } else {
 167          if (driDrawPriv)
 168             dri_get_buffers(driDrawPriv);
 169          if (driDrawPriv != driReadPriv && driReadPriv)
 170             dri_get_buffers(driReadPriv);
 171       }
 172    } else {
 173       st_make_current(NULL, NULL, NULL);
 174    }
 175
 176    return GL_TRUE;
 177 }
 178
 179 static void
 180 st_dri_lock(struct pipe_context *pipe)
 181 {
 182    dri_lock((struct dri_context *)pipe->priv);
 183 }
 184
 185 static void
 186 st_dri_unlock(struct pipe_context *pipe)
 187 {
 188    dri_unlock((struct dri_context *)pipe->priv);
 189 }
 190
 191 static boolean
 192 st_dri_is_locked(struct pipe_context *pipe)
 193 {
 194    return ((struct dri_context *)pipe->priv)->isLocked;
 195 }
 196
 197 static boolean
 198 st_dri_lost_lock(struct pipe_context *pipe)
 199 {
 200    return ((struct dri_context *)pipe->priv)->wsLostLock;
 201 }
 202
 203 static void
 204 st_dri_clear_lost_lock(struct pipe_context *pipe)
 205 {
 206    ((struct dri_context *)pipe->priv)->wsLostLock = FALSE;
 207 }
 208
 209 struct dri1_api_lock_funcs dri1_lf = {
 210    .lock = st_dri_lock,
 211    .unlock = st_dri_unlock,
 212    .is_locked = st_dri_is_locked,
 213    .is_lock_lost = st_dri_lost_lock,
 214    .clear_lost_lock = st_dri_clear_lost_lock
 215 };
 216
 217 /* vim: set sw=3 ts=8 sts=3 expandtab: */