/* See LICENSE file for copyright and license details. */
#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)3 << 61;
/**
* The default class for the program
*/
char default_class[] = PKGNAME "::cg-darkroom::standard";
/**
* Class suffixes
*/
const char* const* class_suffixes = (const char* const[]){NULL};
/**
* -d: keep process alive and remove filter on death
*/
static int dflag = 0;
/**
* -x: remove filter rather than adding it
*/
static int xflag = 0;
/**
* The brilliance of the red channel
*/
static double value = 0.25;
/**
* Print usage information and exit
*/
void usage(void)
{
fprintf(stderr,
"Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
"(-x | [-p priority] [-d] [brightness])\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
usage();
return 0;
(void) arg;
}
/**
* Parse a non-negative double encoded as a string
*
* @param out Output parameter for the value
* @param str The string
* @return 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 (!*str || !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 prio The argument associated with the "-p" option
* @return Zero on success, -1 on error
*/
int handle_args(int argc, char* argv[], char* prio)
{
int q = xflag + dflag;
if ((q > 1) || (xflag && (prio != NULL || argc)))
usage();
if (argc == 1)
{
if (parse_double(&value, argv[0]) < 0)
usage();
}
else if (argc)
usage();
return 0;
}
/**
* Fill a filter
*
* @param filter The filter to fill
* @return Zero on success, -1 on error
*/
static int fill_filter(libcoopgamma_filter_t* restrict filter)
{
union libcoopgamma_ramps dramps;
size_t size;
if ((0 <= value) && (value <= 1))
{
switch (filter->depth)
{
#define X(CONST, MEMBER, MAX, TYPE)\
case CONST:\
libclut_negative(&(filter->ramps.MEMBER), MAX, TYPE, 1, 0, 0);\
libclut_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, 1, 0, 0);\
libclut_cie_brightness(&(filter->ramps.MEMBER), MAX, TYPE, value, value, value);\
break;
LIST_DEPTHS
#undef X
default:
abort();
}
return 0;
}
if (filter->depth == LIBCOOPGAMMA_DOUBLE)
{
libclut_negative(&(filter->ramps.d), (double)1, double, 1, 0, 0);
libclut_rgb_brightness(&(filter->ramps.d), (double)1, double, 1, 0, 0);
libclut_cie_brightness(&(filter->ramps.d), (double)1, double, value, value, value);
libclut_clip(&(filter->ramps.d), (double)1, double, 1, 0, 0);
return 0;
}
if (filter->depth == LIBCOOPGAMMA_FLOAT)
{
libclut_negative(&(filter->ramps.f), (float)1, float, 1, 0, 0);
libclut_rgb_brightness(&(filter->ramps.f), (float)1, float, 1, 0, 0);
libclut_cie_brightness(&(filter->ramps.f), (float)1, float, value, value, value);
libclut_clip(&(filter->ramps.f), (float)1, float, 1, 0, 0);
return 0;
}
size = dramps.d.red_size = filter->ramps.d.red_size;
size += dramps.d.green_size = filter->ramps.d.green_size;
size += dramps.d.blue_size = filter->ramps.d.blue_size;
dramps.d.red = calloc(size, sizeof(double));
if (dramps.d.red == NULL)
return -1;
dramps.d.green = dramps.d.red + dramps.d.red_size;
dramps.d.blue = dramps.d.green + dramps.d.green_size;
libclut_start_over(&(dramps.d), (double)1, double, 1, 0, 0);
libclut_negative(&(dramps.d), (double)1, double, 1, 0, 0);
libclut_rgb_brightness(&(dramps.d), (double)1, double, 1, 0, 0);
libclut_cie_brightness(&(dramps.d), (double)1, double, value, value, value);
libclut_clip(&(dramps.d), (double)1, double, 1, 0, 0);
switch (filter->depth)
{
case LIBCOOPGAMMA_UINT8:
libclut_translate(&(filter->ramps.u8), UINT8_MAX, uint8_t, &(dramps.d), (double)1, double);
break;
case LIBCOOPGAMMA_UINT16:
libclut_translate(&(filter->ramps.u16), UINT16_MAX, uint16_t, &(dramps.d), (double)1, double);
break;
case LIBCOOPGAMMA_UINT32:
libclut_translate(&(filter->ramps.u32), UINT32_MAX, uint32_t, &(dramps.d), (double)1, double);
break;
case LIBCOOPGAMMA_UINT64:
libclut_translate(&(filter->ramps.u64), UINT64_MAX, uint64_t, &(dramps.d), (double)1, double);
break;
default:
abort();
}
free(dramps.d.red);
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;
size_t i, j;
if (xflag)
for (i = 0; i < filters_n; i++)
crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
else if (dflag)
for (i = 0; i < filters_n; i++)
crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
else
for (i = 0; i < filters_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 < filters_n; i++)
{
if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
continue;
if (!xflag)
if ((r = fill_filter(&(crtc_updates[i].filter))) < 0)
return r;
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;
}
