SubtractRect function

Computes the bounding box with the geometric difference between two rectangles.

Declaration

pascal

function SubtractRect(out lprcDst: TRect; const lprcSrc1: TRect; 
 const lprcSrc2: TRect): Boolean

False when the resulting rectangle is empty.

When the rectangles do not overlap completely in either x or y direction, the result is the first rectangle (lprcSrc1).

Otherwise the overlapping area is excluded from the first rectangle.

The bounding box is the rectangle that covers the entire resulting area.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.