Draws a horizontal line on the current context from the starting coordinates to the ending coordinates using the specified color.
This is more efficient that using fast_draw_line.
This function does not perform clipping. If you cannot ensure that the endpoints are within the bounds of the current context, then use draw_hline instead.
| x1 |
starting X coordinate |
| x2 |
ending X coordinate |
| y |
Y coordinate |
| c |
the color |