Add ColorPacker.toString

knokko · Oct 28, 2024 · 0407795 · 0407795
1 parent 8ed1f4e
commit 0407795
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diff --git a/src/main/java/com/github/knokko/boiler/utilities/ColorPacker.java b/src/main/java/com/github/knokko/boiler/utilities/ColorPacker.java
@@ -80,4 +80,15 @@ public static byte alpha(int rgba) {
 	public static int unsigned(byte value) {
 		return value & 0xFF;
 	}
+
+	/**
+	 * Returns a nice string showing the R, G, B, and A component of the packed color, like RGB(1, 2, 3) or
+	 * RGB(100, 200, 200, 200). The alpha is skipped when it is 255 (opaque).
+	 */
+	public static String toString(int packed) {
+		int alpha = unsigned(alpha(packed));
+		String rgb = unsigned(red(packed)) + ", " + unsigned(green(packed)) + ", " + unsigned(blue(packed));
+		if (alpha == 255) return "RGB(" + rgb + ")";
+		else return "RGBA(" + rgb + ", " + unsigned(alpha(packed)) + ")";
+	}
 }
diff --git a/src/test/java/com/github/knokko/boiler/utilities/TestColorPacker.java b/src/test/java/com/github/knokko/boiler/utilities/TestColorPacker.java
@@ -51,4 +51,10 @@ public void testSimplePackingRGB() {
 		assertEquals(rgba(1, 2, 3, 255), rgb(1, 2, 3));
 		assertEquals(rgba(1, 2, 3, 255), rgb((byte) 1, (byte) 2, (byte) 3));
 	}
+
+	@Test
+	public void testToString() {
+		assertEquals("RGBA(0, 100, 255, 200)", ColorPacker.toString(rgba(0, 100, 255, 200)));
+		assertEquals("RGB(255, 100, 0)", ColorPacker.toString(rgb(255, 100, 0)));
+	}
 }