summaryrefslogtreecommitdiff
path: root/src/gallium/state_trackers/dri/common/dri_st_api.c
blob: 40b24b18e9f40e8a5715b6a2c1043383f88a32e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/*
 * Mesa 3-D graphics library
 * Version:  7.9
 *
 * Copyright (C) 2010 LunarG Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *    Chia-I Wu <olv@lunarg.com>
 */

#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "util/u_format.h"
#include "util/u_debug.h"
#include "state_tracker/st_manager.h" /* for st_manager_create_api */

#include "dri_screen.h"
#include "dri_context.h"
#include "dri_drawable.h"
#include "dri_st_api.h"
#include "dri1_helper.h"
#ifndef __NOT_HAVE_DRM_H
#include "dri1.h"
#include "dri2.h"
#else
#include "drisw.h"
#endif

static boolean
dri_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
                            const enum st_attachment_type *statts,
                            unsigned count,
                            struct pipe_texture **out)
{
   struct dri_drawable *drawable =
      (struct dri_drawable *) stfbi->st_manager_private;
   unsigned statt_mask, new_mask;
   boolean new_stamp;
   int i;

   statt_mask = 0x0;
   for (i = 0; i < count; i++)
      statt_mask |= (1 << statts[i]);

   /* record newly allocated textures */
   new_mask = (statt_mask & ~drawable->texture_mask);

   /*
    * dPriv->pStamp is the server stamp.  It should be accessed with a lock, at
    * least for DRI1.  dPriv->lastStamp is the client stamp.  It has the value
    * of the server stamp when last checked.
    */
   new_stamp = (drawable->texture_stamp != drawable->dPriv->lastStamp);

   if (new_stamp || new_mask) {

#ifndef __NOT_HAVE_DRM_H
      if (__dri1_api_hooks) {
         dri1_allocate_textures(drawable, statt_mask);
      }
      else {
         dri2_allocate_textures(drawable, statts, count);
      }
#else
      if (new_stamp)
         drisw_update_drawable_info(drawable->dPriv);

      drisw_allocate_textures(drawable, statt_mask);
#endif

      /* add existing textures */
      for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
         if (drawable->textures[i])
            statt_mask |= (1 << i);
      }

      drawable->texture_stamp = drawable->dPriv->lastStamp;
      drawable->texture_mask = statt_mask;
   }

   if (!out)
      return TRUE;

   for (i = 0; i < count; i++) {
      out[i] = NULL;
      pipe_texture_reference(&out[i], drawable->textures[statts[i]]);
   }

   return TRUE;
}

static boolean
dri_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
                               enum st_attachment_type statt)
{
   struct dri_drawable *drawable =
      (struct dri_drawable *) stfbi->st_manager_private;

#ifndef __NOT_HAVE_DRM_H
   if (__dri1_api_hooks) {
      dri1_flush_frontbuffer(drawable, statt);
   }
   else {
      dri2_flush_frontbuffer(drawable, statt);
   }
#else
   drisw_flush_frontbuffer(drawable, statt);
#endif

   return TRUE;
}

/**
 * Create a framebuffer from the given drawable.
 */
struct st_framebuffer_iface *
dri_create_st_framebuffer(struct dri_drawable *drawable)
{
   struct st_framebuffer_iface *stfbi;

   stfbi = CALLOC_STRUCT(st_framebuffer_iface);
   if (stfbi) {
      stfbi->visual = &drawable->stvis;
      stfbi->flush_front = dri_st_framebuffer_flush_front;
      stfbi->validate = dri_st_framebuffer_validate;
      stfbi->st_manager_private = (void *) drawable;
   }

   return stfbi;
}

/**
 * Destroy a framebuffer.
 */
void
dri_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
{
   struct dri_drawable *drawable =
      (struct dri_drawable *) stfbi->st_manager_private;
   int i;

   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
      pipe_texture_reference(&drawable->textures[i], NULL);

   FREE(stfbi);
}

/**
 * Validate the texture at an attachment.  Allocate the texture if it does not
 * exist.
 */
void
dri_st_framebuffer_validate_att(struct st_framebuffer_iface *stfbi,
                                enum st_attachment_type statt)
{
   struct dri_drawable *drawable =
      (struct dri_drawable *) stfbi->st_manager_private;
   enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
   unsigned i, count = 0;

   /* check if buffer already exists */
   if (drawable->texture_mask & (1 << statt))
      return;

   /* make sure DRI2 does not destroy existing buffers */
   for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
      if (drawable->texture_mask & (1 << i)) {
         statts[count++] = i;
      }
   }
   statts[count++] = statt;

   drawable->texture_stamp = drawable->dPriv->lastStamp - 1;

   stfbi->validate(stfbi, statts, count, NULL);
}

/**
 * Reference counted st_api.
 */
static struct {
   int32_t refcnt;
   struct st_api *stapi;
} dri_st_api;

/**
 * Add a reference to the st_api of the state tracker.
 */
static void
_dri_get_st_api(void)
{
   p_atomic_inc(&dri_st_api.refcnt);
   if (p_atomic_read(&dri_st_api.refcnt) == 1)
      dri_st_api.stapi = st_manager_create_api();
}

/**
 * Remove a reference to the st_api of the state tracker.
 */
static void
_dri_put_st_api(void)
{
   struct st_api *stapi = dri_st_api.stapi;

   if (p_atomic_dec_zero(&dri_st_api.refcnt)) {
      stapi->destroy(dri_st_api.stapi);
      dri_st_api.stapi = NULL;
   }
}

/**
 * Create a state tracker manager from the given screen.
 */
struct st_manager *
dri_create_st_manager(struct dri_screen *screen)
{
   struct st_manager *smapi;

   smapi = CALLOC_STRUCT(st_manager);
   if (smapi) {
      smapi->screen = screen->pipe_screen;
      _dri_get_st_api();
   }

   return smapi;
}

/**
 * Destroy a state tracker manager.
 */
void
dri_destroy_st_manager(struct st_manager *smapi)
{
   _dri_put_st_api();
   FREE(smapi);
}

/**
 * Return the st_api of OpenGL state tracker.
 */
struct st_api *
dri_get_st_api(void)
{
   assert(dri_st_api.stapi);
   return dri_st_api.stapi;
}