From 8170593d56b196da3234b26967f8f7938a16225b Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Tue, 10 Oct 2023 10:49:13 -0400
Subject: [PATCH] Add Color struct

---
 src/fart/color.d | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 src/fart/color.d

diff --git a/src/fart/color.d b/src/fart/color.d
new file mode 100644
index 0000000..822e3c4
--- /dev/null
+++ b/src/fart/color.d
@@ -0,0 +1,43 @@
+module fart.color;
+
+/**
+ * Structure to represent a RGBA color value.
+ */
+struct Color
+{
+    /** Red color component. */
+    double r;
+
+    /** Green color component. */
+    double g;
+
+    /** Blue color component. */
+    double b;
+
+    /** Alpha color component. */
+    double a;
+
+    /**
+     * Convert color to a 32-bit integer RGBA value.
+     *
+     * Each color component uses one byte.
+     */
+    public ubyte[] rgba32() const
+    {
+        return [toubyte(r), toubyte(g), toubyte(b), toubyte(a)];
+    }
+
+    /**
+     * Scale a floating point color component value to an unsigned 8-bit byte
+     * value.
+     *
+     * @param v
+     *   Floating point color component value.
+     *
+     * @return Unsigned 8-bit byte value for the color component.
+     */
+    private static ubyte toubyte(double v)
+    {
+        return cast(ubyte)(0xFF * v);
+    }
+}