Add ColorGray for grayscale colors.

1 files changed, 60 insertions, 0 deletions

diff --git a/dmagick/ColorGray.d b/dmagick/ColorGray.d
new file mode 100644
index 0000000..3d78bda
--- /dev/null
+++ b/dmagick/ColorGray.d
@@ -0,0 +1,60 @@
+/**
+ * Copyright: Mike Wey 2011
+ * License:   zlib (See accompanying LICENSE file)
+ * Authors:   Mike Wey
+ */
+
+module dmagick.ColorGray;
+
+import dmagick.Color;
+
+import dmagick.c.magickType;
+import dmagick.c.quantum;
+
+/**
+ * A Gray scale color.
+ */
+class ColorGray : Color
+{
+	///
+	this()
+	{
+		super();
+	}
+
+	/**
+	 * Create a Color from the specified Bytes.
+	 */
+	this(ubyte shade, ubyte opacity = 0)
+	{
+		Quantum gray = ScaleCharToQuantum(shade);
+
+		super(gray, gray, gray, ScaleCharToQuantum(opacity));
+	}
+
+	/**
+	 * Create a Color from the specified doubles.
+	 * The values should be between 0.0 and 1.0.
+	 */
+	this(double shade, double opacity = 0)
+	{
+		Quantum gray = scaleDoubleToQuantum(shade);
+
+		super(gray, gray, gray, scaleDoubleToQuantum(opacity));
+	}
+
+	/**
+	 * The value for the shade as a double in the range [0.0 .. 1.0]
+	 */
+	void shade(double shade)
+	{
+		pixelPacket.red   = ScaleCharToQuantum(shade);
+		pixelPacket.green = ScaleCharToQuantum(shade);
+		pixelPacket.blue  = ScaleCharToQuantum(shade);
+	}
+	///ditto
+	double shade()
+	{
+		return scaleQuantumToDouble(pixelPacket.red);
+	}
+}