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sway/commands/output: Add command to set color profile
This makes it possible to render output buffers in a different color space, by specifying an ICC profile for the output.
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,108 @@ | ||
#define _XOPEN_SOURCE 700 | ||
#include <fcntl.h> | ||
#include <strings.h> | ||
#include <sys/stat.h> | ||
#include <unistd.h> | ||
#include <wlr/render/color.h> | ||
#include "log.h" | ||
#include "sway/commands.h" | ||
#include "sway/config.h" | ||
|
||
static bool read_file_into_buf(const char *path, void **buf, size_t *size) { | ||
/* Why not use fopen/fread directly? glibc will succesfully open directories, | ||
* not just files, and supports seeking on them. Instead, we directly | ||
* work with file descriptors and use the more consistent open/fstat/read. */ | ||
int fd = open(path, O_RDONLY | O_NOCTTY | O_CLOEXEC); | ||
if (fd == -1) { | ||
return false; | ||
} | ||
char *b = NULL; | ||
struct stat info; | ||
if (fstat(fd, &info) == -1) { | ||
goto fail; | ||
} | ||
// only regular files, to avoid issues with e.g. opening pipes | ||
if (!S_ISREG(info.st_mode)) { | ||
goto fail; | ||
} | ||
off_t s = info.st_size; | ||
if (s <= 0) { | ||
goto fail; | ||
} | ||
b = calloc(1, s); | ||
if (!b) { | ||
goto fail; | ||
} | ||
size_t nread = 0; | ||
while (nread < (size_t)s) { | ||
size_t to_read = (size_t)s - nread; | ||
ssize_t r = read(fd, (void *)(b + nread), to_read); | ||
if ((r == -1 && errno != EINTR) || r == 0) { | ||
goto fail; | ||
} | ||
nread += (size_t)r; | ||
} | ||
*buf = b; | ||
*size = (size_t)s; | ||
return true; // success | ||
fail: | ||
free(b); | ||
close(fd); | ||
return false; | ||
} | ||
|
||
struct cmd_results *output_cmd_color_profile(int argc, char **argv) { | ||
if (!config->handler_context.output_config) { | ||
return cmd_results_new(CMD_FAILURE, "Missing output config"); | ||
} | ||
if (!argc) { | ||
return cmd_results_new(CMD_INVALID, "Missing color profile first argument."); | ||
} | ||
|
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if (strcmp(*argv, "srgb") == 0) { | ||
if (config->handler_context.output_config->has_color_transform == 1) { | ||
wlr_color_transform_unref(config->handler_context.output_config->color_transform); | ||
} | ||
config->handler_context.output_config->color_transform = NULL; | ||
config->handler_context.output_config->has_color_transform = 0; | ||
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config->handler_context.leftovers.argc = argc - 1; | ||
config->handler_context.leftovers.argv = argv + 1; | ||
} else if (strcmp(*argv, "icc") == 0) { | ||
if (argc < 2) { | ||
return cmd_results_new(CMD_INVALID, | ||
"Invalid color profile specification; icc type requires a file"); | ||
} | ||
void *data = NULL; | ||
size_t size = 0; | ||
if (!read_file_into_buf(argv[1], &data, &size)) { | ||
return cmd_results_new(CMD_INVALID, | ||
"Failed to read color profile ICC file"); | ||
} | ||
|
||
struct wlr_color_transform *tmp = wlr_color_transform_init_linear_to_icc(data, size); | ||
if (!tmp) { | ||
free(data); | ||
return cmd_results_new(CMD_INVALID, | ||
"Invalid color profile specification; failed to initialize transform from ICC"); | ||
} | ||
free(data); | ||
|
||
if (config->handler_context.output_config->has_color_transform == 1) { | ||
wlr_color_transform_unref(config->handler_context.output_config->color_transform); | ||
} | ||
config->handler_context.output_config->color_transform = tmp; | ||
config->handler_context.output_config->has_color_transform = 1; | ||
|
||
sway_log(SWAY_ERROR, "ICC profile loaded and set up"); | ||
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config->handler_context.leftovers.argc = argc - 2; | ||
config->handler_context.leftovers.argv = argv + 2; | ||
} else { | ||
return cmd_results_new(CMD_INVALID, | ||
"Invalid color profile specification; first argument should be icc|srgb"); | ||
} | ||
|
||
return NULL; | ||
} | ||
|
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