aboutsummaryrefslogtreecommitdiffstats
path: root/src/cg-sleepmode.c
blob: 757b7ef759b87d8cb9ef9bd780d48feccf115d13 (plain) (blame)
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
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
/**
 * cg-tools -- Cooperative gamma-enabled tools
 * 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 "cg-base.h"

#include <libclut.h>

#if defined(_GNU_SOURCE)
# undef _GNU_SOURCE
#endif
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>



/**
 * The default filter priority for the program
 */
const int64_t default_priority = ((int64_t)3) << 59;

/**
 * The default class for the program
 */
char default_class[] = PKGNAME "::cg-sleepmode::standard";



/**
 * -r: fade-out time for the red channel
 */
static char* rflag;

/**
 * -g: fade-out time for the green channel
 */
static char* gflag;

/**
 * -b: fade-out time for the blue channel
 */
static char* bflag;

/**
 * The duration, in seconds, of the red channel's fade out
 */
static double red_time = 3;

/**
 * The duration, in seconds, of the green channel's fade out
 */
static double green_time = 2;

/**
 * The duration, in seconds, of the blue channel's fade out
 */
static double blue_time = 1;

/**
 * The luminosity of red channel after the fade out
 */
static double red_target = 0.5;

/**
 * The luminosity of green channel after the fade out
 */
static double green_target = 0;

/**
 * The luminosity of blue channel after the fade out
 */
static double blue_target = 0;

/**
 * Time to fade in?
 */
static volatile sig_atomic_t received_int = 0;



/**
 * Print usage information and exit
 */
void usage(void)
{
  fprintf(stderr,
	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] [-p priority] "
	  "[-r red-fadeout-time] [-g green-fadeout-time] [-b blue-fadeout-time] "
	  "[red-luminosity [green-luminosity [blue-luminosity]]]\n",
	  argv0);
  exit(1);
}


/**
 * Called when a signal is received
 * that tells the program to terminate
 * 
 * @param  signo  The received signal
 */
static void sig_int(int signo)
{
  received_int = 1;
  (void) signo;
}


/**
 * Handle a command line option
 * 
 * @param   opt  The option, it is a NUL-terminate two-character
 *               string starting with either '-' or '+', if the
 *               argument is not recognised, call `usage`. This
 *               string will not be "-M", "-S", "-c", "-p", or "-R".
 * @param   arg  The argument associated with `opt`,
 *               `NULL` there is no next argument, if this
 *               parameter is `NULL` but needed, call `usage`
 * @return       0 if `arg` was not used,
 *               1 if `arg` was used,
 *               -1 on error
 */
int handle_opt(char* opt, char* arg)
{
  if (opt[0] == '-')
    switch (opt[1])
      {
      case 'r':
	if (rflag || !(rflag = arg))
	  usage();
	return 1;
      case 'g':
	if (gflag || !(gflag = arg))
	  usage();
	return 1;
      case 'b':
	if (bflag || !(bflag = arg))
	  usage();
	return 1;
      default:
	usage();
      }
  else
    usage();
  return 0;
}


/**
 * Parse a non-negative double encoded as a string
 * 
 * @param   out  Output parameter for the value
 * @param   str  The string
 * @retunr       Zero on success, -1 if the string is invalid
 */
static int parse_double(double* restrict out, const char* restrict str)
{
  char* end;
  errno = 0;
  *out = strtod(str, &end);
  if (errno || (*out < 0) || isinf(*out) || isnan(*out) || *end)
    return -1;
  if (!strchr("0123456789.", *str))
    return -1;
  return 0;
}


/**
 * This function is called after the last
 * call to `handle_opt`
 * 
 * @param   argc    The number of unparsed arguments
 * @param   argv    `NULL` terminated list of unparsed arguments
 * @param   method  The argument associated with the "-M" option
 * @param   site    The argument associated with the "-S" option
 * @param   crtcs_  The arguments associated with the "-c" options, `NULL`-terminated
 * @param   prio    The argument associated with the "-p" option
 * @param   rule    The argument associated with the "-R" option
 * @return          Zero on success, -1 on error
 */
int handle_args(int argc, char* argv[], char* method, char* site,
		char** crtcs_, char* prio, char* rule)
{
  int q = (rflag || gflag || bflag || argc);
  q += (method != NULL) &&  !strcmp(method, "?");
  q += (prio   != NULL) &&  !strcmp(prio, "?");
  q += (rule   != NULL) && (!strcmp(rule, "?") || !strcmp(rule, "??"));
  for (; *crtcs_; crtcs_++)
    q += !strcmp(*crtcs_, "?");
  if ((q > 1) || (argc > 3))
    usage();
  if (rflag != NULL)
    if (parse_double(&red_time, rflag) < 0)
      usage();
  if (gflag != NULL)
    if (parse_double(&green_time, gflag) < 0)
      usage();
  if (bflag != NULL)
    if (parse_double(&blue_time, bflag) < 0)
      usage();
  if (argc >= 1)
    if (parse_double(&red_target, argv[0]) < 0)
      usage();
  if (argc >= 2)
    if (parse_double(&green_target, argv[1]) < 0)
      usage();
  if (argc >= 3)
    if (parse_double(&blue_target, argv[2]) < 0)
      usage();
  if (red_target >= 1)
    red_time = 0;
  if (green_target >= 1)
    green_time = 0;
  if (blue_target >= 1)
    blue_time = 0;
  return 0;
  (void) site;
}


/**
 * Fill a filter
 * 
 * @param  filter  The filter to fill
 * @param  red     The red brightness
 * @param  green   The green brightness
 * @param  blue    The blue brightness
 */
static void fill_filter(libcoopgamma_filter_t* restrict filter, double red, double green, double blue)
{
  switch (filter->depth)
    {
#define X(CONST, MEMBER, MAX, TYPE)\
    case CONST:\
      libclut_start_over(&(filter->ramps.MEMBER), MAX, TYPE, 1, 1, 1);\
      libclut_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, red, green, blue);\
      break;
LIST_DEPTHS
#undef X
    default:
      abort();
    }
}


/**
 * Get the current monotonic time as a double
 * 
 * @param   now  Output parameter for the current time (monotonic)
 * @return       Zero on success, -1 on error
 */
static int double_time(double* restrict now)
{
#ifndef CLOCK_MONOTONIC_RAW
# define CLOCK_MONOTONIC_RAW  CLOCK_MONOTONIC
#endif
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts) < 0)
    return -1;
  *now  = (double)(ts.tv_nsec);
  *now /= 1000000000L;
  *now += (double)(ts.tv_sec);
  return 0;
}


/**
 * The main function for the program-specific code
 * 
 * @return  0: Success
 *          -1: Error, `errno` set
 *          -2: Error, `cg.error` set
 *          -3: Error, message already printed
 */
int start(void)
{
  int r, fade_red, fade_green, fade_blue;
  size_t i, j;
  double t, starttime, red, green, blue, redt, greent, bluet;
  
  redt   = (red_target   - 1) / red_time;
  greent = (green_target - 1) / green_time;
  bluet  = (blue_target  - 1) / blue_time;
  fade_red   = !isinf(redt)   && !isnan(redt);
  fade_green = !isinf(greent) && !isnan(greent);
  fade_blue  = !isinf(bluet)  && !isnan(bluet);
  
  for (i = 0; i < crtcs_n; i++)
    crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
  
  if ((r = make_slaves()) < 0)
    return r;
  
  if ((r = double_time(&starttime)) < 0)
    return r;
  
  red   = red_target   < 0 ? 0 : red_target   > 1 ? 1 : red_target;
  green = green_target < 0 ? 0 : green_target > 1 ? 1 : green_target;
  blue  = blue_target  < 0 ? 0 : blue_target  > 1 ? 1 : blue_target;
  
  for (;;)
    {
      if ((r = double_time(&t)) < 0)
	return r;
      t -= starttime;
      if (fade_red)
	{if (red   = 1 + t * redt,   red   > 1)  red   = 1;  else if (red   < 0)  red   = 0;}
      if (fade_green)
	{if (green = 1 + t * greent, green > 1)  green = 1;  else if (green < 0)  green = 0;}
      if (fade_blue)
	{if (blue  = 1 + t * bluet,  blue  > 1)  blue  = 1;  else if (blue  < 0)  blue  = 0;}
      
      for (i = 0, r = 1; i < crtcs_n; i++)
	{
	  if (!(crtc_updates[i].master) || !(crtc_info[i].supported))
	    continue;
	  fill_filter(&(crtc_updates[i].filter), red, green, blue);
	  r = update_filter(i, 0);
	  if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
	    return r;
	  if (crtc_updates[i].slaves != NULL)
	    for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
	      {
		r = update_filter(crtc_updates[i].slaves[j], 0);
		if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
		  return r;
	      }
	}
      
      while (r != 1)
	if ((r = synchronise(-1)) < 0)
	  return r;
      
      sched_yield();
      
      if ((t >= red_time) && (t >= green_time) && (t >= blue_time))
	break;
    }
  
  if ((signal(SIGINT,  sig_int) == SIG_ERR) ||
      (signal(SIGTERM, sig_int) == SIG_ERR) ||
      (signal(SIGHUP,  sig_int) == SIG_ERR))
    return -1;
  
  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
    return -1;
  for (;;)
    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
      {
	if (received_int)
	  goto fade_in;
	switch (errno)
	  {
	  case 0:
	    break;
	  case ENOTRECOVERABLE:
	    goto enotrecoverable;
	  default:
	    return 1;
	  }
      }
  
 fade_in:
  if (libcoopgamma_set_nonblocking(&cg, 1) < 0)
    return -1;
  
  t = red_time;
  t = t > green_time ? t : green_time;
  t = t > blue_time  ? t : blue_time;
  redt   = t - red_time;
  greent = t - green_time;
  bluet  = t - blue_time;
  t = red_time + green_time + blue_time;
  if (red_time > 0)
    t = t < red_time   ? t : red_time;
  if (green_time > 0)
    t = t < green_time ? t : green_time;
  if (blue_time > 0)
    t = t < blue_time  ? t : blue_time;
  red_time   = t + redt;
  green_time = t + greent;
  blue_time  = t + bluet;
  
  red = green = blue = 1;
  
  if ((r = double_time(&starttime)) < 0)
    return r;
  
  for (;;)
    {
      if ((r = double_time(&t)) < 0)
	return r;
      t -= starttime;
      redt   = t / red_time;
      greent = t / green_time;
      bluet  = t / blue_time;
      if (!isinf(redt) && !isnan(redt))
	{
	  red = red_target * (1 - redt) + redt;
	  if (red > 1)  red = 1;  else if (red < 0)  red = 0;
	}
      if (!isinf(greent) && !isnan(greent))
	{
	  green = green_target * (1 - greent) + greent;
	  if (green > 1)  green = 1;  else if (green < 0)  green = 0;
	}
      if (!isinf(bluet) && !isnan(bluet))
	{
	  blue = blue_target * (1 - bluet) + bluet;
	  if (blue > 1)  blue = 1;  else if (blue < 0)  blue = 0;
	}
      
      for (i = 0, r = 1; i < crtcs_n; i++)
	{
	  if (!(crtc_updates[i].master) || !(crtc_info[i].supported))
	    continue;
	  fill_filter(&(crtc_updates[i].filter), red, green, blue);
	  r = update_filter(i, 0);
	  if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
	    return r;
	  if (crtc_updates[i].slaves != NULL)
	    for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
	      {
		r = update_filter(crtc_updates[i].slaves[j], 0);
		if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
		  return r;
	      }
	}
      
      while (r != 1)
	if ((r = synchronise(-1)) < 0)
	  return r;
      
      sched_yield();
      
      if ((t >= red_time) && (t >= green_time) && (t >= blue_time))
	break;
    }
  
  return 0;
 enotrecoverable:
  for (;;)
    if (pause() < 0)
      return -1;
}