*Determine a bounding box for two rectangles*

int PtRectUnion( PhRect_t *rect1, PhRect_t const *rect2);

This function changes the rectangle pointed to by *rect1* to a
rectangle that encompasses *rect2* using *rect1* as a
starting point. The result is a bounding box for the two original rectangles.

- 0
- The resulting rectangle is inverted (only possible if inverted
rectangles are provided as parameters i.e.
*ul*>*lr*). - 1
- The resulting rectangle is a regular rectangle (i.e.
*ul*<*lr*).

Photon

Safety: | |
---|---|

Interrupt handler | No |

Signal handler | No |

Thread | No |