rgb_color: Add new APIs: Contrast(), IsLight(), IsDark()

- Remove perceptual_brightness - Change implementation of rgb_color::Brightness() to the previous BPrivate::perceptual_brightness() - Introduce convenience methods Contrast(rgb_color), IsLight() and IsDark() Change-Id: Id677d4a32ce43d73bffecf9baf8cffaafb01a16d Reviewed-on: https://review.haiku-os.org/c/haiku/+/7399 Reviewed-by: waddlesplash <[email protected]>
2024-02-26 20:24:25 +00:00
parent d24476aaf0
commit 9931e8eeee
7 changed files with 39 additions and 44 deletions
@@ -59,6 +59,28 @@ typedef struct rgb_color {

 	int32 Brightness() const;

+	inline bool
+	IsDark() const
+	{
+		return Brightness() <= 127;
+	}
+
+	inline bool
+	IsLight() const
+	{
+		return Brightness() > 127;
+	}
+
+	static inline int32
+	Contrast(rgb_color colorA, rgb_color colorB)
+	{
+		int32 contrast = colorA.Brightness() - colorB.Brightness();
+		if (contrast < 0)
+			return -contrast;
+
+		return contrast;
+	}
+
 	inline bool
 	operator==(const rgb_color& other) const
 	{