dri_context.c revision 94ccc31ba4f64ac480137fd90f1ded44d2072f6e 
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 struct gl_config * 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_context_attribs attribs;
61
62   memset(&attribs, 0, sizeof(attribs));
63   switch (api) {
64   case API_OPENGLES:
65      attribs.profile = ST_PROFILE_OPENGL_ES1;
66      break;
67   case API_OPENGLES2:
68      attribs.profile = ST_PROFILE_OPENGL_ES2;
69      break;
70   default:
71      attribs.profile = ST_PROFILE_DEFAULT;
72      break;
73   }
74
75   if (sharedContextPrivate) {
76      st_share = ((struct dri_context *)sharedContextPrivate)->st;
77   }
78
79   ctx = CALLOC_STRUCT(dri_context);
80   if (ctx == NULL)
81      goto fail;
82
83   cPriv->driverPrivate = ctx;
84   ctx->cPriv = cPriv;
85   ctx->sPriv = sPriv;
86   ctx->lock = screen->drmLock;
87
88   driParseConfigFiles(&ctx->optionCache,
89		       &screen->optionCache, sPriv->myNum, "dri");
90
91   dri_fill_st_visual(&attribs.visual, screen, visual);
92   ctx->st = stapi->create_context(stapi, &screen->base, &attribs, st_share);
93   if (ctx->st == NULL)
94      goto fail;
95   ctx->st->st_manager_private = (void *) ctx;
96   ctx->stapi = stapi;
97
98   /*
99    * libmesagallium.a that this state tracker will be linked to expects
100    * OpenGL's _glapi_table.  That is, it expects libGL.so instead of
101    * libGLESv1_CM.so or libGLESv2.so.  As there is no clean way to know the
102    * shared library the app links to, use the api as a simple check.
103    * It might be as well to simply remove this function call though.
104    */
105   if (api == API_OPENGL)
106      dri_init_extensions(ctx);
107
108   return GL_TRUE;
109
110 fail:
111   if (ctx && ctx->st)
112      ctx->st->destroy(ctx->st);
113
114   FREE(ctx);
115   return GL_FALSE;
116}
117
118void
119dri_destroy_context(__DRIcontext * cPriv)
120{
121   struct dri_context *ctx = dri_context(cPriv);
122
123   /* note: we are freeing values and nothing more because
124    * driParseConfigFiles allocated values only - the rest
125    * is owned by screen optionCache.
126    */
127   FREE(ctx->optionCache.values);
128
129   /* No particular reason to wait for command completion before
130    * destroying a context, but it is probably worthwhile flushing it
131    * to avoid having to add code elsewhere to cope with flushing a
132    * partially destroyed context.
133    */
134   ctx->st->flush(ctx->st, 0, NULL);
135   ctx->st->destroy(ctx->st);
136
137   FREE(ctx);
138}
139
140GLboolean
141dri_unbind_context(__DRIcontext * cPriv)
142{
143   /* dri_util.c ensures cPriv is not null */
144   struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
145   struct dri_context *ctx = dri_context(cPriv);
146   struct dri_drawable *draw = dri_drawable(ctx->dPriv);
147   struct dri_drawable *read = dri_drawable(ctx->rPriv);
148   struct st_api *stapi = screen->st_api;
149
150   if (--ctx->bind_count == 0) {
151      if (ctx->st == ctx->stapi->get_current(ctx->stapi)) {
152         ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
153         stapi->make_current(stapi, NULL, NULL, NULL);
154         draw->context = NULL;
155         read->context = NULL;
156      }
157   }
158
159   return GL_TRUE;
160}
161
162GLboolean
163dri_make_current(__DRIcontext * cPriv,
164		 __DRIdrawable * driDrawPriv,
165		 __DRIdrawable * driReadPriv)
166{
167   /* dri_util.c ensures cPriv is not null */
168   struct dri_context *ctx = dri_context(cPriv);
169   struct dri_drawable *draw = dri_drawable(driDrawPriv);
170   struct dri_drawable *read = dri_drawable(driReadPriv);
171   struct st_context_iface *old_st = ctx->stapi->get_current(ctx->stapi);
172
173   if (old_st && old_st != ctx->st)
174      old_st->flush(old_st, PIPE_FLUSH_RENDER_CACHE, NULL);
175
176   ++ctx->bind_count;
177
178   if (!driDrawPriv && !driReadPriv)
179      return ctx->stapi->make_current(ctx->stapi, ctx->st, NULL, NULL);
180   else if (!driDrawPriv || !driReadPriv)
181      return GL_FALSE;
182
183   draw->context = ctx;
184   if (ctx->dPriv != driDrawPriv) {
185      ctx->dPriv = driDrawPriv;
186      draw->texture_stamp = driDrawPriv->lastStamp - 1;
187   }
188   read->context = ctx;
189   if (ctx->rPriv != driReadPriv) {
190      ctx->rPriv = driReadPriv;
191      read->texture_stamp = driReadPriv->lastStamp - 1;
192   }
193
194   ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
195
196   return GL_TRUE;
197}
198
199struct dri_context *
200dri_get_current(__DRIscreen *sPriv)
201{
202   struct dri_screen *screen = dri_screen(sPriv);
203   struct st_api *stapi = screen->st_api;
204   struct st_context_iface *st;
205
206   st = stapi->get_current(stapi);
207
208   return (struct dri_context *) (st) ? st->st_manager_private : NULL;
209}
210
211/* vim: set sw=3 ts=8 sts=3 expandtab: */
212