93 lines
3.9 KiB
Groff
93 lines
3.9 KiB
Groff
.\" Copyright (c) 1999 - Sun Microsystems, Inc.
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.\" All rights reserved.
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining a
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.\" copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, and/or sell copies of the Software, and to permit persons
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.\" to whom the Software is furnished to do so, provided that the above
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.\" copyright notice(s) and this permission notice appear in all copies of
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.\" the Software and that both the above copyright notice(s) and this
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.\" permission notice appear in supporting documentation.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
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.\" OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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.\" HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
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.\" INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
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.\" FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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.\" NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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.\" WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of a copyright holder
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.\" shall not be used in advertising or otherwise to promote the sale, use
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.\" or other dealings in this Software without prior written authorization
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.\" of the copyright holder.
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.\"
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.TH XkbComputeShapeBounds __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
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.SH NAME
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XkbComputeShapeBounds \- Updates the bounding box of a shape
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.SH SYNOPSIS
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.B Bool XkbComputeShapeBounds
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(
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.I shape
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)
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.br
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XkbShapePtr \fIshape\fP\^;
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.if n .ti +5n
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.if t .ti +.5i
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.SH ARGUMENTS
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.TP
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.I \- shape
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shape to be examined
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.SH DESCRIPTION
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.LP
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Xkb provides a number of convenience functions to help use a keyboard geometry. These include
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functions to return the bounding box of a shape's top surface and to update the bounding box
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of a shape row or section.
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A shape is made up of a number of outlines. Each outline is a polygon made up of a number of
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points. The bounding box of a shape is a rectangle that contains all the outlines of that
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shape.
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A ShapeRec contains a BoundsRec that describes the bounds of the shape. If you add or delete
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an outline to or from a shape, the bounding box must be updated.
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.I XkbComputeShapeBounds
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updates the BoundsRec contained in the
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.I shape
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by examining all the outlines of the shape and setting the BoundsRec to the minimum x and
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minimum y, and maximum x and maximum y values found in those outlines.
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.I XkbComputeShapeBounds
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returns False if
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.I shape
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is NULL or if there are no outlines for the shape; otherwise, it returns True.
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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
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.I XkbComputeRowBounds.
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.SH STRUCTURES
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.LP
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.nf
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typedef struct _XkbShape {
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Atom name; /\(** shape's name */
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unsigned short num_outlines; /\(** number of outlines for the shape */
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unsigned short sz_outlines; /\(** size of the outlines array */
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XkbOutlinePtr outlines; /\(** array of outlines for the shape */
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XkbOutlinePtr approx; /\(** pointer into the array to the approximating outline */
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XkbOutlinePtr primary; /\(** pointer into the array to the primary outline */
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XkbBoundsRec bounds; /\(** bounding box for the shape; encompasses all outlines */
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} XkbShapeRec, *XkbShapePtr;
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typedef struct _XkbBounds {
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short x1,y1; /\(** upper left corner of the bounds, in mm/10 */
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short x2,y2; /\(** lower right corner of the bounds, in mm/10 */
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} XkbBoundsRec, *XkbBoundsPtr;
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.fi
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.SH "SEE ALSO"
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.BR XkbComputeRowBounds (__libmansuffix__)
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