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 #include "dri_drawable.h"
  34 #include "dri_context.h"
  35 #include "dri1.h"
  36
  37 #include "state_tracker/st_public.h"
  38 #include "pipe/p_context.h"
  39 #include "util/u_memory.h"
  40
  41 GLboolean
  42 dri_create_context(const __GLcontextModes * visual,
  43                    __DRIcontext * cPriv, void *sharedContextPrivate)
  44 {
  45    __DRIscreen *sPriv = cPriv->driScreenPriv;
  46    struct dri_screen *screen = dri_screen(sPriv);
  47    struct dri_context *ctx = NULL;
  48    struct st_context *st_share = NULL;
  49
  50    if (sharedContextPrivate) {
  51       st_share = ((struct dri_context *)sharedContextPrivate)->st;
  52    }
  53
  54    ctx = CALLOC_STRUCT(dri_context);
  55    if (ctx == NULL)
  56       goto fail;
  57
  58    cPriv->driverPrivate = ctx;
  59    ctx->cPriv = cPriv;
  60    ctx->sPriv = sPriv;
  61    ctx->lock = screen->drmLock;
  62    ctx->d_stamp = -1;
  63    ctx->r_stamp = -1;
  64
  65    driParseConfigFiles(&ctx->optionCache,
  66                        &screen->optionCache, sPriv->myNum, "dri");
  67
  68    ctx->pipe = screen->pipe_screen->context_create( screen->pipe_screen,
  69                                                     ctx );
  70
  71    if (ctx->pipe == NULL)
  72       goto fail;
  73
  74    ctx->st = st_create_context(ctx->pipe, visual, st_share);
  75    if (ctx->st == NULL)
  76       goto fail;
  77
  78    dri_init_extensions(ctx);
  79
  80    return GL_TRUE;
  81
  82  fail:
  83    if (ctx && ctx->st)
  84       st_destroy_context(ctx->st);
  85
  86    if (ctx && ctx->pipe)
  87       ctx->pipe->destroy(ctx->pipe);
  88
  89    FREE(ctx);
  90    return FALSE;
  91 }
  92
  93 void
  94 dri_destroy_context(__DRIcontext * cPriv)
  95 {
  96    struct dri_context *ctx = dri_context(cPriv);
  97
  98    /* note: we are freeing values and nothing more because
  99     * driParseConfigFiles allocated values only - the rest
 100     * is owned by screen optionCache.
 101     */
 102    FREE(ctx->optionCache.values);
 103
 104    /* No particular reason to wait for command completion before
 105     * destroying a context, but it is probably worthwhile flushing it
 106     * to avoid having to add code elsewhere to cope with flushing a
 107     * partially destroyed context.
 108     */
 109    st_flush(ctx->st, 0, NULL);
 110
 111    /* Also frees ctx->pipe?
 112     */
 113    st_destroy_context(ctx->st);
 114
 115    FREE(ctx);
 116 }
 117
 118 GLboolean
 119 dri_unbind_context(__DRIcontext * cPriv)
 120 {
 121    if (cPriv) {
 122       struct dri_context *ctx = dri_context(cPriv);
 123
 124       if (--ctx->bind_count == 0) {
 125          if (ctx->st && ctx->st == st_get_current()) {
 126             st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 127             st_make_current(NULL, NULL, NULL, NULL);
 128          }
 129       }
 130    }
 131
 132    return GL_TRUE;
 133 }
 134
 135 GLboolean
 136 dri_make_current(__DRIcontext * cPriv,
 137                  __DRIdrawable * driDrawPriv,
 138                  __DRIdrawable * driReadPriv)
 139 {
 140    if (cPriv) {
 141       struct dri_context *ctx = dri_context(cPriv);
 142       struct dri_drawable *draw = dri_drawable(driDrawPriv);
 143       struct dri_drawable *read = dri_drawable(driReadPriv);
 144       struct st_context *old_st = st_get_current();
 145
 146       if (old_st && old_st != ctx->st)
 147          st_flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
 148
 149       ++ctx->bind_count;
 150
 151       if (ctx->dPriv != driDrawPriv) {
 152          ctx->dPriv = driDrawPriv;
 153          ctx->d_stamp = driDrawPriv->lastStamp - 1;
 154       }
 155       if (ctx->rPriv != driReadPriv) {
 156          ctx->rPriv = driReadPriv;
 157          ctx->r_stamp = driReadPriv->lastStamp - 1;
 158       }
 159
 160       /* DRI co-state tracker currently overrides flush_frontbuffer.
 161        * When this is fixed, will need to pass the drawable in the
 162        * fourth parameter here so that when Mesa calls
 163        * flush_frontbuffer directly (in front-buffer rendering), it
 164        * will have access to the drawable argument:
 165        */
 166       st_make_current(ctx->st, draw->stfb, read->stfb, ctx);
 167
 168       if (__dri1_api_hooks) {
 169          dri1_update_drawables(ctx, draw, read);
 170       } else {
 171          dri_update_buffer(ctx->pipe->screen,
 172                            ctx->pipe->priv);
 173       }
 174    } else {
 175       st_make_current(NULL, NULL, NULL, NULL);
 176    }
 177
 178    return GL_TRUE;
 179 }
 180
 181 /* vim: set sw=3 ts=8 sts=3 expandtab: */