dri_context.c revision 1372a8f90dc64350e4ac29dbb8c5feb88bc83cd1 
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 "utils.h"
33
34#include "dri_screen.h"
35#include "dri_drawable.h"
36#include "dri_context.h"
37
38#include "pipe/p_context.h"
39#include "state_tracker/st_context.h"
40
41static void
42dri_init_extensions(struct dri_context *ctx)
43{
44   struct st_context *st = (struct st_context *) ctx->st;
45
46   /* New extensions should be added in mesa/state_tracker/st_extensions.c
47    * and not in this file. */
48   driInitExtensions(st->ctx, NULL, GL_FALSE);
49}
50
51GLboolean
52dri_create_context(const __GLcontextModes * visual,
53		   __DRIcontext * cPriv, void *sharedContextPrivate)
54{
55   __DRIscreen *sPriv = cPriv->driScreenPriv;
56   struct dri_screen *screen = dri_screen(sPriv);
57   struct st_api *stapi = screen->st_api;
58   struct dri_context *ctx = NULL;
59   struct st_context_iface *st_share = NULL;
60   struct st_visual stvis;
61
62   if (sharedContextPrivate) {
63      st_share = ((struct dri_context *)sharedContextPrivate)->st;
64   }
65
66   ctx = CALLOC_STRUCT(dri_context);
67   if (ctx == NULL)
68      goto fail;
69
70   cPriv->driverPrivate = ctx;
71   ctx->cPriv = cPriv;
72   ctx->sPriv = sPriv;
73   ctx->lock = screen->drmLock;
74
75   driParseConfigFiles(&ctx->optionCache,
76		       &screen->optionCache, sPriv->myNum, "dri");
77
78   dri_fill_st_visual(&stvis, screen, visual);
79   ctx->st = stapi->create_context(stapi, &screen->base, &stvis, st_share);
80   if (ctx->st == NULL)
81      goto fail;
82   ctx->st->st_manager_private = (void *) ctx;
83
84   dri_init_extensions(ctx);
85
86   return GL_TRUE;
87
88 fail:
89   if (ctx && ctx->st)
90      ctx->st->destroy(ctx->st);
91
92   FREE(ctx);
93   return FALSE;
94}
95
96void
97dri_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   ctx->st->flush(ctx->st, 0, NULL);
113   ctx->st->destroy(ctx->st);
114
115   FREE(ctx);
116}
117
118GLboolean
119dri_unbind_context(__DRIcontext * cPriv)
120{
121   struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
122   struct st_api *stapi = screen->st_api;
123
124   if (cPriv) {
125      struct dri_context *ctx = dri_context(cPriv);
126
127      if (--ctx->bind_count == 0) {
128         if (ctx->st == stapi->get_current(stapi)) {
129            ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
130            stapi->make_current(stapi, NULL, NULL, NULL);
131         }
132      }
133   }
134
135   return GL_TRUE;
136}
137
138GLboolean
139dri_make_current(__DRIcontext * cPriv,
140		 __DRIdrawable * driDrawPriv,
141		 __DRIdrawable * driReadPriv)
142{
143   struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
144   struct st_api *stapi = screen->st_api;
145
146   if (cPriv) {
147      struct dri_context *ctx = dri_context(cPriv);
148      struct dri_drawable *draw = dri_drawable(driDrawPriv);
149      struct dri_drawable *read = dri_drawable(driReadPriv);
150      struct st_context_iface *old_st;
151
152      old_st = stapi->get_current(stapi);
153      if (old_st && old_st != ctx->st)
154	 ctx->st->flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
155
156      ++ctx->bind_count;
157
158      if (ctx->dPriv != driDrawPriv) {
159	 ctx->dPriv = driDrawPriv;
160         draw->texture_stamp = driDrawPriv->lastStamp - 1;
161      }
162      if (ctx->rPriv != driReadPriv) {
163	 ctx->rPriv = driReadPriv;
164         read->texture_stamp = driReadPriv->lastStamp - 1;
165      }
166
167      stapi->make_current(stapi, ctx->st, &draw->base, &read->base);
168   }
169   else {
170      stapi->make_current(stapi, NULL, NULL, NULL);
171   }
172
173   return GL_TRUE;
174}
175
176struct dri_context *
177dri_get_current(__DRIscreen *sPriv)
178{
179   struct dri_screen *screen = dri_screen(sPriv);
180   struct st_api *stapi = screen->st_api;
181   struct st_context_iface *st;
182
183   st = stapi->get_current(stapi);
184
185   return (struct dri_context *) (st) ? st->st_manager_private : NULL;
186}
187
188/* vim: set sw=3 ts=8 sts=3 expandtab: */
189