dri_context.c revision 7ec681f3 
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#include "frontend/drm_driver.h"
38
39#include "pipe/p_context.h"
40#include "pipe-loader/pipe_loader.h"
41#include "state_tracker/st_context.h"
42
43#include "util/u_memory.h"
44
45GLboolean
46dri_create_context(gl_api api, const struct gl_config * visual,
47                   __DRIcontext * cPriv,
48                   const struct __DriverContextConfig *ctx_config,
49                   unsigned *error,
50                   void *sharedContextPrivate)
51{
52   __DRIscreen *sPriv = cPriv->driScreenPriv;
53   struct dri_screen *screen = dri_screen(sPriv);
54   struct st_api *stapi = screen->st_api;
55   struct dri_context *ctx = NULL;
56   struct st_context_iface *st_share = NULL;
57   struct st_context_attribs attribs;
58   enum st_context_error ctx_err = 0;
59   unsigned allowed_flags = __DRI_CTX_FLAG_DEBUG |
60                            __DRI_CTX_FLAG_FORWARD_COMPATIBLE |
61                            __DRI_CTX_FLAG_NO_ERROR;
62   unsigned allowed_attribs =
63      __DRIVER_CONTEXT_ATTRIB_PRIORITY |
64      __DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR;
65   const __DRIbackgroundCallableExtension *backgroundCallable =
66      screen->sPriv->dri2.backgroundCallable;
67   const struct driOptionCache *optionCache = &screen->dev->option_cache;
68
69   if (screen->has_reset_status_query) {
70      allowed_flags |= __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS;
71      allowed_attribs |= __DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY;
72   }
73
74   if (ctx_config->flags & ~allowed_flags) {
75      *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
76      goto fail;
77   }
78
79   if (ctx_config->attribute_mask & ~allowed_attribs) {
80      *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
81      goto fail;
82   }
83
84   memset(&attribs, 0, sizeof(attribs));
85   switch (api) {
86   case API_OPENGLES:
87      attribs.profile = ST_PROFILE_OPENGL_ES1;
88      break;
89   case API_OPENGLES2:
90      attribs.profile = ST_PROFILE_OPENGL_ES2;
91      break;
92   case API_OPENGL_COMPAT:
93   case API_OPENGL_CORE:
94      if (driQueryOptionb(optionCache, "force_compat_profile")) {
95         attribs.profile = ST_PROFILE_DEFAULT;
96      } else {
97         attribs.profile = api == API_OPENGL_COMPAT ? ST_PROFILE_DEFAULT
98                                                    : ST_PROFILE_OPENGL_CORE;
99      }
100
101      attribs.major = ctx_config->major_version;
102      attribs.minor = ctx_config->minor_version;
103
104      if ((ctx_config->flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
105	 attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
106      break;
107   default:
108      *error = __DRI_CTX_ERROR_BAD_API;
109      goto fail;
110   }
111
112   if ((ctx_config->flags & __DRI_CTX_FLAG_DEBUG) != 0)
113      attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
114
115   if (ctx_config->flags & __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)
116      attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
117
118   if (ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY)
119      if (ctx_config->reset_strategy != __DRI_CTX_RESET_NO_NOTIFICATION)
120         attribs.flags |= ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED;
121
122   if (ctx_config->flags & __DRI_CTX_FLAG_NO_ERROR)
123      attribs.flags |= ST_CONTEXT_FLAG_NO_ERROR;
124
125   if (ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_PRIORITY) {
126      switch (ctx_config->priority) {
127      case __DRI_CTX_PRIORITY_LOW:
128         attribs.flags |= ST_CONTEXT_FLAG_LOW_PRIORITY;
129         break;
130      case __DRI_CTX_PRIORITY_HIGH:
131         attribs.flags |= ST_CONTEXT_FLAG_HIGH_PRIORITY;
132         break;
133      default:
134         break;
135      }
136   }
137
138   if ((ctx_config->attribute_mask & __DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR)
139       && (ctx_config->release_behavior == __DRI_CTX_RELEASE_BEHAVIOR_NONE))
140      attribs.flags |= ST_CONTEXT_FLAG_RELEASE_NONE;
141
142   struct dri_context *share_ctx = NULL;
143   if (sharedContextPrivate) {
144      share_ctx = (struct dri_context *)sharedContextPrivate;
145      st_share = share_ctx->st;
146   }
147
148   ctx = CALLOC_STRUCT(dri_context);
149   if (ctx == NULL) {
150      *error = __DRI_CTX_ERROR_NO_MEMORY;
151      goto fail;
152   }
153
154   cPriv->driverPrivate = ctx;
155   ctx->cPriv = cPriv;
156   ctx->sPriv = sPriv;
157
158   if (driQueryOptionb(&screen->dev->option_cache, "mesa_no_error"))
159      attribs.flags |= ST_CONTEXT_FLAG_NO_ERROR;
160
161   attribs.options = screen->options;
162   dri_fill_st_visual(&attribs.visual, screen, visual);
163   ctx->st = stapi->create_context(stapi, &screen->base, &attribs, &ctx_err,
164				   st_share);
165   if (ctx->st == NULL) {
166      switch (ctx_err) {
167      case ST_CONTEXT_SUCCESS:
168	 *error = __DRI_CTX_ERROR_SUCCESS;
169	 break;
170      case ST_CONTEXT_ERROR_NO_MEMORY:
171	 *error = __DRI_CTX_ERROR_NO_MEMORY;
172	 break;
173      case ST_CONTEXT_ERROR_BAD_API:
174	 *error = __DRI_CTX_ERROR_BAD_API;
175	 break;
176      case ST_CONTEXT_ERROR_BAD_VERSION:
177	 *error = __DRI_CTX_ERROR_BAD_VERSION;
178	 break;
179      case ST_CONTEXT_ERROR_BAD_FLAG:
180	 *error = __DRI_CTX_ERROR_BAD_FLAG;
181	 break;
182      case ST_CONTEXT_ERROR_UNKNOWN_ATTRIBUTE:
183	 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
184	 break;
185      case ST_CONTEXT_ERROR_UNKNOWN_FLAG:
186	 *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
187	 break;
188      }
189      goto fail;
190   }
191   ctx->st->st_manager_private = (void *) ctx;
192   ctx->stapi = stapi;
193
194   if (ctx->st->cso_context) {
195      ctx->pp = pp_init(ctx->st->pipe, screen->pp_enabled, ctx->st->cso_context,
196                        ctx->st);
197      ctx->hud = hud_create(ctx->st->cso_context, ctx->st,
198                            share_ctx ? share_ctx->hud : NULL);
199   }
200
201   /* Do this last. */
202   if (ctx->st->start_thread &&
203         driQueryOptionb(&screen->dev->option_cache, "mesa_glthread")) {
204
205      if (backgroundCallable && backgroundCallable->base.version >= 2 &&
206            backgroundCallable->isThreadSafe) {
207
208         if (backgroundCallable->isThreadSafe(cPriv->loaderPrivate))
209            ctx->st->start_thread(ctx->st);
210         else
211            fprintf(stderr, "dri_create_context: glthread isn't thread safe "
212                  "- missing call XInitThreads\n");
213      } else {
214         fprintf(stderr, "dri_create_context: requested glthread but driver "
215               "is missing backgroundCallable V2 extension\n");
216      }
217   }
218
219   *error = __DRI_CTX_ERROR_SUCCESS;
220   return GL_TRUE;
221
222 fail:
223   if (ctx && ctx->st)
224      ctx->st->destroy(ctx->st);
225
226   free(ctx);
227   return GL_FALSE;
228}
229
230void
231dri_destroy_context(__DRIcontext * cPriv)
232{
233   struct dri_context *ctx = dri_context(cPriv);
234
235   if (ctx->hud) {
236      hud_destroy(ctx->hud, ctx->st->cso_context);
237   }
238
239   if (ctx->pp)
240      pp_free(ctx->pp);
241
242   /* No particular reason to wait for command completion before
243    * destroying a context, but we flush the context here
244    * to avoid having to add code elsewhere to cope with flushing a
245    * partially destroyed context.
246    */
247   ctx->st->flush(ctx->st, 0, NULL, NULL, NULL);
248   ctx->st->destroy(ctx->st);
249   free(ctx);
250}
251
252/* This is called inside MakeCurrent to unbind the context. */
253GLboolean
254dri_unbind_context(__DRIcontext * cPriv)
255{
256   /* dri_util.c ensures cPriv is not null */
257   struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
258   struct dri_context *ctx = dri_context(cPriv);
259   struct st_context_iface *st = ctx->st;
260   struct st_api *stapi = screen->st_api;
261
262   if (--ctx->bind_count == 0) {
263      if (st == stapi->get_current(stapi)) {
264         if (st->thread_finish)
265            st->thread_finish(st);
266
267         /* Record HUD queries for the duration the context was "current". */
268         if (ctx->hud)
269            hud_record_only(ctx->hud, st->pipe);
270
271         stapi->make_current(stapi, NULL, NULL, NULL);
272      }
273   }
274   ctx->dPriv = NULL;
275   ctx->rPriv = NULL;
276
277   return GL_TRUE;
278}
279
280GLboolean
281dri_make_current(__DRIcontext * cPriv,
282		 __DRIdrawable * driDrawPriv,
283		 __DRIdrawable * driReadPriv)
284{
285   /* dri_util.c ensures cPriv is not null */
286   struct dri_context *ctx = dri_context(cPriv);
287   struct dri_drawable *draw = dri_drawable(driDrawPriv);
288   struct dri_drawable *read = dri_drawable(driReadPriv);
289
290   ++ctx->bind_count;
291
292   if (!draw && !read)
293      return ctx->stapi->make_current(ctx->stapi, ctx->st, NULL, NULL);
294   else if (!draw || !read)
295      return GL_FALSE;
296
297   if (ctx->dPriv != driDrawPriv) {
298      ctx->dPriv = driDrawPriv;
299      draw->texture_stamp = driDrawPriv->lastStamp - 1;
300   }
301   if (ctx->rPriv != driReadPriv) {
302      ctx->rPriv = driReadPriv;
303      read->texture_stamp = driReadPriv->lastStamp - 1;
304   }
305
306   ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
307
308   /* This is ok to call here. If they are already init, it's a no-op. */
309   if (ctx->pp && draw->textures[ST_ATTACHMENT_BACK_LEFT])
310      pp_init_fbos(ctx->pp, draw->textures[ST_ATTACHMENT_BACK_LEFT]->width0,
311                   draw->textures[ST_ATTACHMENT_BACK_LEFT]->height0);
312
313   return GL_TRUE;
314}
315
316struct dri_context *
317dri_get_current(__DRIscreen *sPriv)
318{
319   struct dri_screen *screen = dri_screen(sPriv);
320   struct st_api *stapi = screen->st_api;
321   struct st_context_iface *st;
322
323   st = stapi->get_current(stapi);
324
325   return (struct dri_context *) st ? st->st_manager_private : NULL;
326}
327
328/* vim: set sw=3 ts=8 sts=3 expandtab: */
329