Add docs, comments and Pixmap.clone()

core.d

@@ -208,6 +208,9 @@ version(Posix) {
 		calc(a.y, b.y).typeCast!int,
 	);
 	---
+
+	History:
+		Added April 24, 2024
  +/
 auto ref T typeCast(T, S)(auto ref S v) {
 	return cast(T) v;

pixmappaint.d

@@ -60,6 +60,16 @@ struct Pixmap {
 		this.width = width;
 	}
 
+	/++
+		Creates a $(I deep clone) of the Pixmap
+	 +/
+	Pixmap clone() const {
+		auto c = Pixmap();
+		c.width = this.width;
+		c.data = this.data.dup;
+		return c;
+	}
+
 	// undocumented: really shouldn’t be used.
 	// carries the risks of `length` and `width` getting out of sync accidentally.
 	deprecated("Use `size` instead.")
@@ -234,6 +244,9 @@ struct Pixmap {
 	void drawLine(Pixmap target, Point a, Point b, Pixel color) {
 		import std.math : round, sqrt;
 
+		// TODO: line width
+		// TODO: anti-aliasing (looks awful without it!)
+
 		float deltaX = b.x - a.x;
 		float deltaY = b.y - a.y;
 		int steps = sqrt(deltaX * deltaX + deltaY * deltaY).typeCast!int;