2 files changed, 12 insertions, 0 deletions
diff --git a/src/calibrator.c b/src/calibrator.c
index a0dcb3a..38987d3 100644
--- a/src/calibrator.c
+++ b/src/calibrator.c
@@ -187,6 +187,11 @@ int draw_id(void)
 }
 
 
+/**
+ * Draw squares used as reference when tweeking the gamma correction
+ * 
+ * @return  Zero on success, -1 on error
+ */
 int draw_gamma(void)
 {
   size_t f, x, y, fn = fb_count();
diff --git a/src/calibrator.h b/src/calibrator.h
index 1db7a3b..d953efd 100644
--- a/src/calibrator.h
+++ b/src/calibrator.h
@@ -63,6 +63,13 @@ int gamma_digit(drm_crtc_t* restrict crtc, int colour, size_t value);
  */
 int draw_id(void);
 
+/**
+ * Draw squares used as reference when tweeking the gamma correction
+ * 
+ * @return  Zero on success, -1 on error
+ */
+int draw_gamma(void);
+
 
 #endif