83 lines
3.5 KiB
Groff
83 lines
3.5 KiB
Groff
.\" Copyright 1999 Sun Microsystems, Inc. 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 "Software"),
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.\" to deal in the Software without restriction, including without limitation
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.\" the rights to use, copy, modify, merge, publish, distribute, sublicense,
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.\" and/or sell copies of the Software, and to permit persons to whom the
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.\" Software is furnished to do so, subject to the following conditions:
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.\"
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.\" The above copyright notice and this permission notice (including the next
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.\" paragraph) shall be included in all copies or substantial portions of the
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.\" Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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.\" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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.\" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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.\" THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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.\" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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.\" FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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.\" DEALINGS IN THE SOFTWARE.
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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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.HP
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.B Bool XkbComputeShapeBounds
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.BI "(\^XkbShapePtr " "shape" "\^);"
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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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