/**
* 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>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/**
* The default filter priority for the program
*/
const int64_t default_priority = ((int64_t)1) << 62;
/**
* The default class for the program
*/
char* const default_class = PKGNAME "::cg-negative::standard";
/**
* -d: keep process alive and remove filter on death
*/
static int dflag = 0;
/**
* -x: remove filter rather than adding it
*/
static int xflag = 0;
/**
* +r: do not touch the red channel
*/
static int rplus = 0;
/**
* +r: do not touch the green channel
*/
static int gplus = 0;
/**
* +r: do not touch the blue channel
*/
static int bplus = 0;
/**
* Print usage information and exit
*/
void usage(void)
{
fprintf(stderr,
"Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] (-d | [-p priority] [-x] [+rgb])\n",
argv0);
exit(1);
}
/**
* 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 'd':
if (dflag || xflag)
usage();
dflag = 1;
break;
case 'x':
if (xflag || dflag)
usage();
xflag = 1;
break;
default:
usage();
}
else
switch (opt[1])
{
case 'r':
if (rplus)
usage();
rplus = 1;
break;
case 'g':
if (gplus)
usage();
gplus = 1;
break;
case 'b':
if (bplus)
usage();
bplus = 1;
break;
default:
usage();
}
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 = xflag + (dflag | rplus | gplus | bplus);
q += (method != NULL) && !strcmp(method, "?");
q += (prio != NULL) && !strcmp(prio, "?");
q += (rule != NULL) && (!strcmp(rule, "?") || !strcmp(rule, "??"));
for (; *crtcs; crtcs++)
q += !strcmp(*crtcs, "?");
if (argc || (q > 1) || (xflag && (prio != NULL)))
usage();
return 0;
}
/**
* Fill a filter
*
* @param The filter to fill
*/
static void fill_filter(libcoopgamma_filter_t* restrict filter)
{
switch (filter->depth)
{
#define X(CONST, MEMBER, MAX, TYPE)\
case CONST:\
libclut_negative(&(filter->ramps.MEMBER), MAX, TYPE, !rplus, !gplus, !bplus);\
break;
LIST_DEPTHS
#undef X
default:
abort();
}
}
/**
* 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;
size_t i, j;
if (xflag)
for (i = 0; i < crtcs_n; i++)
crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
else if (dflag)
for (i = 0; i < crtcs_n; i++)
crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
else
for (i = 0; i < crtcs_n; i++)
crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
if (!xflag)
if ((r = make_slaves()) < 0)
return r;
for (i = 0, r = 1; i < crtcs_n; i++)
{
if (!(crtc_updates[i].master) || !(crtc_info[i].supported))
continue;
if (!xflag)
fill_filter(&(crtc_updates[i].filter));
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;
if (!dflag)
return 0;
if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
return -1;
for (;;)
if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
switch (errno)
{
case 0:
break;
case ENOTRECOVERABLE:
goto enotrecoverable;
default:
return -1;
}
enotrecoverable:
for (;;)
if (pause() < 0)
return -1;
}
