NAME
XkbComputeShapeTop - Determines the bounding box of the top surface of
a shape
SYNOPSIS
Bool XkbComputeShapeTop (XkbShapePtr shape, XkbBoundsPtr bounds_rtrn);
ARGUMENTS
- shape
shape to be examined
- bounds_rtrn
backfilled with the bounding box for the shape
DESCRIPTION
Xkb provides a number of convenience functions to help use a keyboard
geometry. These include functions to return the bounding box of a
shape’s top surface and to update the bounding box of a shape row or
section.
A shape is made up of a number of outlines. Each outline is a polygon
made up of a number of points. The bounding box of a shape is a
rectangle that contains all the outlines of that shape.
XkbComputeShapeTop returns a BoundsRec that contains two x and y
coordinates. These coordinates describe the corners of a rectangle that
contains the outline that describes the top surface of the shape. The
top surface is defined to be the approximating outline if the approx
field of shape is not NULL. If approx is NULL, the top surface is
defined as the last outline in the shapes array of outlines.
XkbComputeShapeTop returns False if shape is NULL or if there are no
outlines for the shape; otherwise, it returns True.
STRUCTURES
typedef struct _XkbBounds {
short x1,y1; /∗ upper left corner of the bounds, in mm/10 */
short x2,y2; /∗ lower right corner of the bounds, in mm/10 */
} XkbBoundsRec, *XkbBoundsPtr;