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-rw-r--r--src/servers/gamma.h94
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diff --git a/src/servers/gamma.h b/src/servers/gamma.h
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+/**
+ * coopgammad -- Cooperative gamma server
+ * 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/>.
+ */
+#ifndef SERVERS_GAMMA_H
+#define SERVERS_GAMMA_H
+
+
+#include "../types/output.h"
+
+#include <stddef.h>
+
+
+
+#ifndef GCC_ONLY
+# if defined(__GNUC__) && !defined(__clang__)
+# define GCC_ONLY(...) __VA_ARGS__
+# else
+# define GCC_ONLY(...) /* nothing */
+# endif
+#endif
+
+
+
+/**
+ * Handle a ‘Command: set-gamma’ message
+ *
+ * @param conn The index of the connection
+ * @param message_id The value of the ‘Message ID’ header
+ * @param crtc The value of the ‘CRTC’ header
+ * @return Zero on success (even if ignored), -1 on error,
+ * 1 if connection closed
+ */
+GCC_ONLY(__attribute__((nonnull(2))))
+int handle_get_gamma_info(size_t conn, const char* restrict message_id, const char* restrict crtc);
+
+/**
+ * Set the gamma ramps on an output
+ *
+ * @param output The output
+ * @param ramps The gamma ramps
+ */
+GCC_ONLY(__attribute__((nonnull)))
+void set_gamma(const struct output* restrict output, const union gamma_ramps* restrict ramps);
+
+
+/**
+ * Store all current gamma ramps
+ *
+ * @return Zero on success, -1 on error
+ */
+int initialise_gamma_info(void);
+
+/**
+ * Store all current gamma ramps
+ */
+void store_gamma(void);
+
+/**
+ * Restore all gamma ramps
+ */
+void restore_gamma(void);
+
+
+/**
+ * Disconnect from the site
+ *
+ * @return Zero on success, -1 on error
+ */
+int disconnect(void);
+
+/**
+ * Reconnect to the site
+ *
+ * @return Zero on success, -1 on error
+ */
+int reconnect(void);
+
+
+#endif
+