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->pipe_screen->context_create( screen->pipe_screen,
  73                                                     ctx );
  74
  75    if (ctx->pipe == NULL)
  76       goto fail;
  77
  78    ctx->st = st_create_context(ctx->pipe, visual, st_share);
  79    if (ctx->st == NULL)
  80       goto fail;
  81
  82    dri_init_extensions(ctx);
  83
  84    return GL_TRUE;
  85
  86  fail:
  87    if (ctx && ctx->st)
  88       st_destroy_context(ctx->st);
  89
  90    if (ctx && ctx->pipe)
  91       ctx->pipe->destroy(ctx->pipe);
  92
  93    FREE(ctx);
  94    return FALSE;
  95 }
  96
  97 void
  98 dri_destroy_context(__DRIcontext * cPriv)
  99 {
 100    struct dri_context *ctx = dri_context(cPriv);
 101
 102    /* note: we are freeing values and nothing more because
 103     * driParseConfigFiles allocated values only - the rest
 104     * is owned by screen optionCache.
 105     */
 106    FREE(ctx->optionCache.values);
 107
 108    /* No particular reason to wait for command completion before
 109     * destroying a context, but it is probably worthwhile flushing it
 110     * to avoid having to add code elsewhere to cope with flushing a
 111     * partially destroyed context.
 112     */
 113    st_flush(ctx->st, 0, 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(__DRIcontext * 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, NULL);
 132          }
 133       }
 134    }
 135
 136    return GL_TRUE;
 137 }
 138
 139 GLboolean
 140 dri_make_current(__DRIcontext * cPriv,
 141                  __DRIdrawable * driDrawPriv,
 142                  __DRIdrawable * driReadPriv)
 143 {
 144    if (cPriv) {
 145       struct dri_context *ctx = dri_context(cPriv);
 146       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 147       struct dri_drawable *read = dri_drawable(driReadPriv);
 148       struct st_context *old_st = st_get_current();
 149
 150       if (old_st && old_st != ctx->st)
 151          st_flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 152
 153       ++ctx->bind_count;
 154
 155       if (ctx->dPriv != driDrawPriv) {
 156          ctx->dPriv = driDrawPriv;
 157          ctx->d_stamp = driDrawPriv->lastStamp - 1;
 158       }
 159       if (ctx->rPriv != driReadPriv) {
 160          ctx->rPriv = driReadPriv;
 161          ctx->r_stamp = driReadPriv->lastStamp - 1;
 162       }
 163
 164       /* DRI co-state tracker currently overrides flush_frontbuffer.
 165        * When this is fixed, will need to pass the drawable in the
 166        * fourth parameter here so that when Mesa calls
 167        * flush_frontbuffer directly (in front-buffer rendering), it
 168        * will have access to the drawable argument:
 169        */
 170       st_make_current(ctx->st, draw->stfb, read->stfb, NULL);
 171
 172       if (__dri1_api_hooks) {
 173          dri1_update_drawables(ctx, draw, read);
 174       } else {
 175          dri_update_buffer(ctx->pipe->screen,
 176                            ctx->pipe->priv);
 177       }
 178    } else {
 179       st_make_current(NULL, NULL, NULL, NULL);
 180    }
 181
 182    return GL_TRUE;
 183 }
 184
 185 static void
 186 st_dri_lock(struct pipe_context *pipe)
 187 {
 188    dri_lock((struct dri_context *)pipe->priv);
 189 }
 190
 191 static void
 192 st_dri_unlock(struct pipe_context *pipe)
 193 {
 194    dri_unlock((struct dri_context *)pipe->priv);
 195 }
 196
 197 static boolean
 198 st_dri_is_locked(struct pipe_context *pipe)
 199 {
 200    return ((struct dri_context *)pipe->priv)->isLocked;
 201 }
 202
 203 static boolean
 204 st_dri_lost_lock(struct pipe_context *pipe)
 205 {
 206    return ((struct dri_context *)pipe->priv)->wsLostLock;
 207 }
 208
 209 static void
 210 st_dri_clear_lost_lock(struct pipe_context *pipe)
 211 {
 212    ((struct dri_context *)pipe->priv)->wsLostLock = FALSE;
 213 }
 214
 215 struct dri1_api_lock_funcs dri1_lf = {
 216    .lock = st_dri_lock,
 217    .unlock = st_dri_unlock,
 218    .is_locked = st_dri_is_locked,
 219    .is_lock_lost = st_dri_lost_lock,
 220    .clear_lost_lock = st_dri_clear_lost_lock
 221 };
 222
 223 /* vim: set sw=3 ts=8 sts=3 expandtab: */