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LEARN ABOUT DEBIAN

xkbcomputeshapebounds

XkbComputeShapeBounds(3)					   XKB FUNCTIONS					  XkbComputeShapeBounds(3)

NAME

       XkbComputeShapeBounds - Updates the bounding box of a shape

SYNOPSIS

       Bool XkbComputeShapeBounds (XkbShapePtr shape);

ARGUMENTS

       - shape
	      shape to be examined

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  rec-
       tangle that contains all the outlines of that shape.

       A  ShapeRec  contains  a BoundsRec that describes the bounds of the shape. If you add or delete an outline to or from a shape, the bounding
       box must be updated.

       XkbComputeShapeBounds updates the BoundsRec contained in the shape by examining all the outlines of the shape and setting the BoundsRec	to
       the  minimum  x and minimum y, and maximum x and maximum y values found in those outlines.  XkbComputeShapeBounds returns False if shape is
       NULL or if there are no outlines for the shape; otherwise, it returns True.

       If you add or delete a key to or from a row, or if you update the shape of one of the keys in that row, you may need to update the bounding
       box of that row. To update the bounding box of a row, use XkbComputeRowBounds.

STRUCTURES

       typedef struct _XkbShape {
	   Atom 	  name; 	/* shape's name */
	   unsigned short num_outlines; /* number of outlines for the shape */
	   unsigned short sz_outlines;	/* size of the outlines array */
	   XkbOutlinePtr  outlines;	/* array of outlines for the shape */
	   XkbOutlinePtr  approx;	/* pointer into the array to the approximating outline */
	   XkbOutlinePtr  primary;	/* pointer into the array to the primary outline */
	   XkbBoundsRec   bounds;	/* bounding box for the shape; encompasses all outlines */
       } XkbShapeRec, *XkbShapePtr;

       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;

SEE ALSO

       XkbComputeRowBounds(3)

X Version 11							   libX11 1.5.0 					  XkbComputeShapeBounds(3)

Programming