This makes it possible to render output buffers in a different color space, by specifying an ICC profile for the output.master
Manuel Stoeckl
2 years ago
committed by
Simon Ser
parent
2e9139df66
commit
40ca4150b2
@ -0,0 +1,101 @@
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#include <fcntl.h>
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#include <strings.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <wlr/render/color.h>
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#include "sway/commands.h"
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#include "sway/config.h"
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static bool read_file_into_buf(const char *path, void **buf, size_t *size) {
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/* Why not use fopen/fread directly? glibc will succesfully open directories,
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* not just files, and supports seeking on them. Instead, we directly
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* work with file descriptors and use the more consistent open/fstat/read. */
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int fd = open(path, O_RDONLY | O_NOCTTY | O_CLOEXEC);
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if (fd == -1) {
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return false;
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}
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char *b = NULL;
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struct stat info;
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if (fstat(fd, &info) == -1) {
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goto fail;
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}
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// only regular files, to avoid issues with e.g. opening pipes
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if (!S_ISREG(info.st_mode)) {
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goto fail;
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}
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off_t s = info.st_size;
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if (s <= 0) {
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goto fail;
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}
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b = calloc(1, s);
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if (!b) {
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goto fail;
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}
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size_t nread = 0;
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while (nread < (size_t)s) {
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size_t to_read = (size_t)s - nread;
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ssize_t r = read(fd, b + nread, to_read);
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if ((r == -1 && errno != EINTR) || r == 0) {
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goto fail;
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}
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nread += (size_t)r;
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}
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close(fd);
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*buf = b;
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*size = (size_t)s;
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return true; // success
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fail:
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free(b);
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close(fd);
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return false;
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}
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struct cmd_results *output_cmd_color_profile(int argc, char **argv) {
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if (!config->handler_context.output_config) {
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return cmd_results_new(CMD_FAILURE, "Missing output config");
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}
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if (!argc) {
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return cmd_results_new(CMD_INVALID, "Missing color_profile first argument.");
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}
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if (strcmp(*argv, "srgb") == 0) {
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wlr_color_transform_unref(config->handler_context.output_config->color_transform);
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config->handler_context.output_config->color_transform = NULL;
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config->handler_context.output_config->set_color_transform = true;
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config->handler_context.leftovers.argc = argc - 1;
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config->handler_context.leftovers.argv = argv + 1;
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} else if (strcmp(*argv, "icc") == 0) {
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if (argc < 2) {
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return cmd_results_new(CMD_INVALID,
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"Invalid color profile specification: icc type requires a file");
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}
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void *data = NULL;
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size_t size = 0;
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if (!read_file_into_buf(argv[1], &data, &size)) {
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return cmd_results_new(CMD_FAILURE,
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"Failed to load color profile: could not read ICC file");
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}
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struct wlr_color_transform *tmp =
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wlr_color_transform_init_linear_to_icc(data, size);
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if (!tmp) {
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free(data);
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return cmd_results_new(CMD_FAILURE,
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"Failed to load color profile: failed to initialize transform from ICC");
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}
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free(data);
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wlr_color_transform_unref(config->handler_context.output_config->color_transform);
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config->handler_context.output_config->color_transform = tmp;
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config->handler_context.output_config->set_color_transform = true;
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config->handler_context.leftovers.argc = argc - 2;
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config->handler_context.leftovers.argv = argv + 2;
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} else {
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return cmd_results_new(CMD_INVALID,
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"Invalid color profile specification: first argument should be icc|srgb");
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}
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return NULL;
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}
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