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 "pipe/p_context.h"
  39
  40 #include "dri_context.h"
  41
  42 #include "util/u_memory.h"
  43
  44 GLboolean
  45 dri_create_context(const __GLcontextModes * visual,
  46                    __DRIcontext * cPriv, void *sharedContextPrivate)
  47 {
  48    __DRIscreen *sPriv = cPriv->driScreenPriv;
  49    struct dri_screen *screen = dri_screen(sPriv);
  50    struct dri_context *ctx = NULL;
  51    struct st_context *st_share = NULL;
  52
  53    if (sharedContextPrivate) {
  54       st_share = ((struct dri_context *)sharedContextPrivate)->st;
  55    }
  56
  57    ctx = CALLOC_STRUCT(dri_context);
  58    if (ctx == NULL)
  59       goto fail;
  60
  61    cPriv->driverPrivate = ctx;
  62    ctx->cPriv = cPriv;
  63    ctx->sPriv = sPriv;
  64    ctx->lock = screen->drmLock;
  65    ctx->d_stamp = -1;
  66    ctx->r_stamp = -1;
  67
  68    driParseConfigFiles(&ctx->optionCache,
  69                        &screen->optionCache, sPriv->myNum, "dri");
  70
  71    ctx->pipe = screen->pipe_screen->context_create( screen->pipe_screen,
  72                                                     ctx );
  73
  74    if (ctx->pipe == NULL)
  75       goto fail;
  76
  77    ctx->st = st_create_context(ctx->pipe, visual, st_share);
  78    if (ctx->st == NULL)
  79       goto fail;
  80
  81    dri_init_extensions(ctx);
  82
  83    return GL_TRUE;
  84
  85  fail:
  86    if (ctx && ctx->st)
  87       st_destroy_context(ctx->st);
  88
  89    if (ctx && ctx->pipe)
  90       ctx->pipe->destroy(ctx->pipe);
  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    st_flush(ctx->st, 0, NULL);
 113
 114    /* Also frees ctx->pipe?
 115     */
 116    st_destroy_context(ctx->st);
 117
 118    FREE(ctx);
 119 }
 120
 121 GLboolean
 122 dri_unbind_context(__DRIcontext * cPriv)
 123 {
 124    if (cPriv) {
 125       struct dri_context *ctx = dri_context(cPriv);
 126
 127       if (--ctx->bind_count == 0) {
 128          if (ctx->st && ctx->st == st_get_current()) {
 129             st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 130             st_make_current(NULL, 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    if (cPriv) {
 144       struct dri_context *ctx = dri_context(cPriv);
 145       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 146       struct dri_drawable *read = dri_drawable(driReadPriv);
 147       struct st_context *old_st = st_get_current();
 148
 149       if (old_st && old_st != ctx->st)
 150          st_flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 151
 152       ++ctx->bind_count;
 153
 154       if (ctx->dPriv != driDrawPriv) {
 155          ctx->dPriv = driDrawPriv;
 156          ctx->d_stamp = driDrawPriv->lastStamp - 1;
 157       }
 158       if (ctx->rPriv != driReadPriv) {
 159          ctx->rPriv = driReadPriv;
 160          ctx->r_stamp = driReadPriv->lastStamp - 1;
 161       }
 162
 163       /* DRI co-state tracker currently overrides flush_frontbuffer.
 164        * When this is fixed, will need to pass the drawable in the
 165        * fourth parameter here so that when Mesa calls
 166        * flush_frontbuffer directly (in front-buffer rendering), it
 167        * will have access to the drawable argument:
 168        */
 169       st_make_current(ctx->st, draw->stfb, read->stfb, ctx);
 170
 171       if (__dri1_api_hooks) {
 172          dri1_update_drawables(ctx, draw, read);
 173       } else {
 174          dri_update_buffer(ctx->pipe->screen,
 175                            ctx->pipe->priv);
 176       }
 177    } else {
 178       st_make_current(NULL, NULL, NULL, NULL);
 179    }
 180
 181    return GL_TRUE;
 182 }
 183
 184 static void
 185 st_dri_lock(struct pipe_context *pipe)
 186 {
 187    dri_lock((struct dri_context *)pipe->priv);
 188 }
 189
 190 static void
 191 st_dri_unlock(struct pipe_context *pipe)
 192 {
 193    dri_unlock((struct dri_context *)pipe->priv);
 194 }
 195
 196 static boolean
 197 st_dri_is_locked(struct pipe_context *pipe)
 198 {
 199    return ((struct dri_context *)pipe->priv)->isLocked;
 200 }
 201
 202 static boolean
 203 st_dri_lost_lock(struct pipe_context *pipe)
 204 {
 205    return ((struct dri_context *)pipe->priv)->wsLostLock;
 206 }
 207
 208 static void
 209 st_dri_clear_lost_lock(struct pipe_context *pipe)
 210 {
 211    ((struct dri_context *)pipe->priv)->wsLostLock = FALSE;
 212 }
 213
 214 struct dri1_api_lock_funcs dri1_lf = {
 215    .lock = st_dri_lock,
 216    .unlock = st_dri_unlock,
 217    .is_locked = st_dri_is_locked,
 218    .is_lock_lost = st_dri_lost_lock,
 219    .clear_lost_lock = st_dri_clear_lost_lock
 220 };
 221
 222 /* vim: set sw=3 ts=8 sts=3 expandtab: */