dri_context.c revision 444d8408e75bb2bce019769da59802f05c3d5fab 
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(gl_api api, 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;
58   struct dri_context *ctx = NULL;
59   struct st_context_iface *st_share = NULL;
60   struct st_visual stvis;
61
62   switch (api) {
63   case API_OPENGL:
64      stapi = screen->st_api[ST_API_OPENGL];
65      break;
66   case API_OPENGLES:
67      stapi = screen->st_api[ST_API_OPENGL_ES1];
68      break;
69   case API_OPENGLES2:
70      stapi = screen->st_api[ST_API_OPENGL_ES2];
71      break;
72   default:
73      stapi = NULL;
74      break;
75   }
76   if (!stapi)
77      return GL_FALSE;
78
79   if (sharedContextPrivate) {
80      st_share = ((struct dri_context *)sharedContextPrivate)->st;
81   }
82
83   ctx = CALLOC_STRUCT(dri_context);
84   if (ctx == NULL)
85      goto fail;
86
87   cPriv->driverPrivate = ctx;
88   ctx->cPriv = cPriv;
89   ctx->sPriv = sPriv;
90   ctx->lock = screen->drmLock;
91
92   driParseConfigFiles(&ctx->optionCache,
93		       &screen->optionCache, sPriv->myNum, "dri");
94
95   dri_fill_st_visual(&stvis, screen, visual);
96   ctx->st = stapi->create_context(stapi, &screen->base, &stvis, st_share);
97   if (ctx->st == NULL)
98      goto fail;
99   ctx->st->st_manager_private = (void *) ctx;
100   ctx->stapi = stapi;
101
102   dri_init_extensions(ctx);
103
104   return GL_TRUE;
105
106 fail:
107   if (ctx && ctx->st)
108      ctx->st->destroy(ctx->st);
109
110   FREE(ctx);
111   return GL_FALSE;
112}
113
114void
115dri_destroy_context(__DRIcontext * cPriv)
116{
117   struct dri_context *ctx = dri_context(cPriv);
118
119   /* note: we are freeing values and nothing more because
120    * driParseConfigFiles allocated values only - the rest
121    * is owned by screen optionCache.
122    */
123   FREE(ctx->optionCache.values);
124
125   /* No particular reason to wait for command completion before
126    * destroying a context, but it is probably worthwhile flushing it
127    * to avoid having to add code elsewhere to cope with flushing a
128    * partially destroyed context.
129    */
130   ctx->st->flush(ctx->st, 0, NULL);
131   ctx->st->destroy(ctx->st);
132
133   FREE(ctx);
134}
135
136GLboolean
137dri_unbind_context(__DRIcontext * cPriv)
138{
139   /* dri_util.c ensures cPriv is not null */
140   struct dri_context *ctx = dri_context(cPriv);
141
142   if (--ctx->bind_count == 0) {
143      if (ctx->st == ctx->stapi->get_current(ctx->stapi)) {
144         ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
145         ctx->stapi->make_current(ctx->stapi, NULL, NULL, NULL);
146      }
147   }
148
149   return GL_TRUE;
150}
151
152GLboolean
153dri_make_current(__DRIcontext * cPriv,
154		 __DRIdrawable * driDrawPriv,
155		 __DRIdrawable * driReadPriv)
156{
157   /* dri_util.c ensures cPriv is not null */
158   struct dri_context *ctx = dri_context(cPriv);
159   struct dri_drawable *draw = dri_drawable(driDrawPriv);
160   struct dri_drawable *read = dri_drawable(driReadPriv);
161   struct st_context_iface *old_st = ctx->stapi->get_current(ctx->stapi);
162
163   if (old_st && old_st != ctx->st)
164      old_st->flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
165
166   ++ctx->bind_count;
167
168   if (ctx->dPriv != driDrawPriv) {
169      ctx->dPriv = driDrawPriv;
170      draw->texture_stamp = driDrawPriv->lastStamp - 1;
171   }
172   if (ctx->rPriv != driReadPriv) {
173      ctx->rPriv = driReadPriv;
174      read->texture_stamp = driReadPriv->lastStamp - 1;
175   }
176
177   ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
178
179   return GL_TRUE;
180}
181
182struct dri_context *
183dri_get_current(__DRIscreen *sPriv)
184{
185   struct dri_screen *screen = dri_screen(sPriv);
186   struct st_api *stapi;
187   struct st_context_iface *st = NULL;
188   gl_api api;
189
190   /* XXX: How do we do this when the screen supports
191      multiple rendering API's? Pick the first one,
192      like this? (NB: all three API's use the same
193      implementation of get_current (see st_manager.c),
194      so maybe it doesn't matter right now since
195      they'll all return the same result.) */
196   for (api = API_OPENGL; api <= API_OPENGLES2; ++api) {
197      stapi = screen->st_api[api];
198      if (!stapi)
199         continue;
200      st = stapi->get_current(stapi);
201      if (st)
202         break;
203   }
204
205   return (struct dri_context *) (st) ? st->st_manager_private : NULL;
206}
207
208/* vim: set sw=3 ts=8 sts=3 expandtab: */
209