92 lines
3.2 KiB
C
92 lines
3.2 KiB
C
/***********************************************************
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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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 THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "regionstr.h"
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#include "mistruct.h"
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#include "mifpoly.h"
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void
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miStepDash (
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int dist, /* distance to step */
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int *pDashIndex, /* current dash */
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unsigned char *pDash, /* dash list */
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int numInDashList, /* total length of dash list */
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int *pDashOffset /* offset into current dash */
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)
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{
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int dashIndex, dashOffset;
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int totallen;
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int i;
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dashIndex = *pDashIndex;
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dashOffset = *pDashOffset;
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if (dist < pDash[dashIndex] - dashOffset)
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{
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*pDashOffset = dashOffset + dist;
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return;
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}
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dist -= pDash[dashIndex] - dashOffset;
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if (++dashIndex == numInDashList)
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dashIndex = 0;
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totallen = 0;
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for (i = 0; i < numInDashList; i++)
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totallen += pDash[i];
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if (totallen <= dist)
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dist = dist % totallen;
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while (dist >= pDash[dashIndex])
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{
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dist -= pDash[dashIndex];
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if (++dashIndex == numInDashList)
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dashIndex = 0;
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}
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*pDashIndex = dashIndex;
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*pDashOffset = dist;
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}
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