Abusing static local variables?

gistfile1.txt

class Renderer {
public:

void Cube(Mat44 transform, Canvas canvas) {
	// bunch of OpenGL calls.
}

// Overload without a texture.
void cube(Mat44 transform) {
        
    // Generate a white texture, once.
    static Canvas white = ([](){
        Canvas canvas(16, 16);
        canvas.begin();
        canvas.rectangle(0, 0, canvas.width, canvas.height);
        canvas.fill(Color::White);
        return canvas;
    }());
    
    // Call the usual routine, along with a white texture.
    cube(transform, white);
}