1 files changed, 6 insertions, 0 deletions
diff --git a/src/common.h b/src/common.h
index 4d0df29..faaecb6 100644
--- a/src/common.h
+++ b/src/common.h
@@ -36,8 +36,14 @@ struct xyz {
 #define COLOR_GREEN 0x00FF00
 #define COLOR_BLUE  0x0000FF
 #define COLOR_LIGHTWHITE 0xF5F5F5
+
 #define color(col) (((col)>>16) & 0xFF), (((col)>>8) & 0xFF), ((col) & 0xFF)
 
+#define scale_color(col, z)                                     \
+    (((((col >> 16) & 0xFF) - clamp(z, 0, 255)) << 16) |  \
+     ((((col >> 8) & 0xFF) - clamp(z, 0, 255)) << 8)   |  \
+     ((col & 0xFF) - clamp(z, 0, 255)))
+
 // macro wrapper for the sdl logging system
 #include <SDL2/SDL.h>
 #define LOG_APPLICATION SDL_LOG_CATEGORY_APPLICATION