Draws a rounded horizontal line.
| cr |
the context to draw with |
| x |
the x location of the line |
| y |
the y location of the line |
| width |
the width of the line |
| height |
the height of the line |
| is_round_left |
weather the left is round or not |
| is_round_right |
weather the right is round or not |
| stroke |
filling style of the outline |
| fill |
filling style of the inner area |