1 files changed, 12 insertions, 0 deletions
diff --git a/common.h b/common.h
index a7cd690..a30d4c7 100644
--- a/common.h
+++ b/common.h
@@ -2,6 +2,10 @@
 #ifndef COMMON_H_
 #define COMMON_H_
 
+#if defined(__GNUC__)
+# pragma GCC diagnostic ignored "-Wunsuffixed-float-constants"
+#endif
+
 #include <libsimple.h>
 #include <libsimple-arg.h>
 #include <libcmap.h>
@@ -15,6 +19,7 @@
 #if defined(__GNUC__)
 # pragma GCC diagnostic pop
 #endif
+#include <math.h>
 
 #if GTK_CHECK_VERSION(2, 12, 0)
 # define HAVE_ITEM_TOOLTIPS
@@ -24,4 +29,11 @@
 
 #include "char-table.h"
 
+/* colour.c */
+double srgb_encode_unsigned(double t);
+double srgb_decode_unsigned(double t);
+double srgb_blend(double at0, double t, double at1);
+void set_source_colour_blend(cairo_t *g, const GdkColor *at0, double t, const GdkColor *at1);
+void set_source_colour(cairo_t *g, const GdkColor *colour);
+
 #endif