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
|
/**
* coopgammad -- Cooperative gamma server
* Copyright (C) 2016 Mattias Andrée (maandree@kth.se)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "crtc.h"
#include "gamma.h"
#include "../state.h"
#include "../communication.h"
#include <errno.h>
#include <string.h>
/**
* Handle a ‘Command: enumerate-crtcs’ message
*
* @param conn The index of the connection
* @param message_id The value of the ‘Message ID’ header
* @return Zero on success (even if ignored), -1 on error,
* 1 if connection closed
*/
int handle_enumerate_crtcs(size_t conn, const char* restrict message_id)
{
size_t i, n = 0, len;
char* restrict buf;
for (i = 0; i < outputs_n; i++)
n += strlen(outputs[i].name) + 1;
MAKE_MESSAGE(&buf, &n, 0,
"Command: crtc-enumeration\n"
"In response to: %s\n"
"Length: %zu\n"
"\n",
message_id, n);
for (i = 0; i < outputs_n; i++)
{
len = strlen(outputs[i].name);
memcpy(buf + n, outputs[i].name, len);
buf[n + len] = '\n';
n += len + 1;
}
return send_message(conn, buf, n);
}
/**
* Get the name of a CRTC
*
* @param info Information about the CRTC
* @param crtc libgamma's state for the CRTC
* @return The name of the CRTC, `NULL` on error
*/
char* get_crtc_name(const libgamma_crtc_information_t* restrict info,
const libgamma_crtc_state_t* restrict crtc)
{
if ((info->edid_error == 0) && (info->edid != NULL))
return libgamma_behex_edid(info->edid, info->edid_length);
else if ((info->connector_name_error == 0) && (info->connector_name != NULL))
{
char* name = malloc(3 * sizeof(size_t) + strlen(info->connector_name) + 2);
if (name != NULL)
sprintf(name, "%zu.%s", crtc->partition->partition, info->connector_name);
return name;
}
else
{
char* name = malloc(2 * 3 * sizeof(size_t) + 2);
if (name != NULL)
sprintf(name, "%zu.%zu", crtc->partition->partition, crtc->crtc);
return name;
}
}
/**
* Get partitions and CRTC:s
*
* @return Zero on success, -1 on error
*/
int initialise_crtcs(void)
{
size_t i, j, n, n0;
int gerror;
/* Get partitions */
if (site.partitions_available)
if (!(partitions = calloc(site.partitions_available, sizeof(*partitions))))
goto fail;
for (i = 0; i < site.partitions_available; i++)
{
if ((gerror = libgamma_partition_initialise(partitions + i, &site, i)))
goto fail_libgamma;
outputs_n += partitions[i].crtcs_available;
}
/* Get CRTC:s */
if (outputs_n)
if (!(crtcs = calloc(outputs_n, sizeof(*crtcs))))
goto fail;
for (i = 0, j = n = 0; i < site.partitions_available; i++)
for (n0 = n, n += partitions[i].crtcs_available; j < n; j++)
if ((gerror = libgamma_crtc_initialise(crtcs + j, partitions + i, j - n0)))
goto fail_libgamma;
return 0;
fail_libgamma:
libgamma_perror(argv0, gerror);
errno = 0;
fail:
return -1;
}
/**
* Merge the new state with an old state
*
* @param old_outputs The old `outputs`
* @param old_outputs_n The old `outputs_n`
* @return Zero on success, -1 on error
*/
int merge_state(struct output* restrict old_outputs, size_t old_outputs_n)
{
struct output* restrict new_outputs = NULL;
size_t new_outputs_n;
size_t i, j, k;
/* How many outputs does the system now have? */
i = j = new_outputs_n = 0;
while ((i < old_outputs_n) && (j < outputs_n))
{
int cmp = strcmp(old_outputs[i].name, outputs[j].name);
if (cmp <= 0)
new_outputs_n++;
i += cmp >= 0;
j += cmp <= 0;
}
new_outputs_n += outputs_n - j;
/* Allocate output state array */
if (new_outputs_n > 0)
{
new_outputs = calloc(new_outputs_n, sizeof(*new_outputs));
if (new_outputs == NULL)
return -1;
}
/* Merge output states */
i = j = k = new_outputs_n = 0;
while ((i < old_outputs_n) && (j < outputs_n))
{
int is_same = 0, cmp = strcmp(old_outputs[i].name, outputs[j].name);
if (cmp == 0)
is_same = (old_outputs[i].depth == outputs[j].depth &&
old_outputs[i].red_size == outputs[j].red_size &&
old_outputs[i].green_size == outputs[j].green_size &&
old_outputs[i].blue_size == outputs[j].blue_size);
if (is_same)
{
new_outputs[k] = old_outputs[i];
new_outputs[k].crtc = outputs[j].crtc;
memset(old_outputs + i, 0, sizeof(*old_outputs));
outputs[j].crtc = NULL;
output_destroy(outputs + j);
k++;
}
else if (cmp <= 0)
new_outputs[k++] = outputs[j];
i += cmp >= 0;
j += cmp <= 0;
}
while (j < outputs_n)
new_outputs[k++] = outputs[j++];
/* Commit merge */
outputs = new_outputs;
outputs_n = new_outputs_n;
return 0;
}
/**
* Disconnect from the site
*
* @return Zero on success, -1 on error
*/
int disconnect(void)
{
size_t i;
if (!connected)
return 0;
connected = 0;
for (i = 0; i < outputs_n; i++)
{
outputs[i].crtc = NULL;
libgamma_crtc_destroy(crtcs + i);
}
free(crtcs), crtcs = NULL;
for (i = 0; i < site.partitions_available; i++)
libgamma_partition_destroy(partitions + i);
free(partitions), partitions = NULL;
libgamma_site_destroy(&site);
return 0;
}
/**
* Reconnect to the site
*
* @return Zero on success, -1 on error
*/
int reconnect(void)
{
if (connected)
return 0;
connected = 1;
reapply_gamma();
return 0; /* TODO reconnect() */
}
|
