1 files changed, 60 insertions, 0 deletions
diff --git a/servers-gamma.h b/servers-gamma.h
new file mode 100644
index 0000000..e522cf5
--- /dev/null
+++ b/servers-gamma.h
@@ -0,0 +1,60 @@
+/* See LICENSE file for copyright and license details. */
+#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);
+
+/**
+ * Reapplu all gamma ramps
+ */
+void reapply_gamma(void);
+
+#endif