Function transform

test/test.cpp:373–382

}

void transform( canvas &that, float width, float height )
{
    that.set_color( stroke_style, 0.0f, 0.0f, 0.0f, 1.0f );
    for ( int step = 0; step < 8; ++step )
    {
        that.transform( 1.0f, 0.0f, 0.1f, 1.0f, width * -0.05f, 0.0f );
        that.stroke_rectangle( width * 0.25f, height * 0.25f,
                               width * 0.5f, height * 0.5f );
    }
}

void transform_fill( canvas &that, float width, float height )
{