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/*
* $XFree86: xc/programs/Xserver/fb/fbline.c,v 1.8 2003/11/03 05:11:00 tsi Exp $
*
* Copyright © 1998 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "fb.h"
void
fbZeroLine (DrawablePtr pDrawable,
GCPtr pGC,
int mode,
int npt,
DDXPointPtr ppt)
{
int x1, y1, x2, y2;
int x, y;
int dashOffset;
x = pDrawable->x;
y = pDrawable->y;
x1 = ppt->x;
y1 = ppt->y;
dashOffset = pGC->dashOffset;
while (--npt)
{
++ppt;
x2 = ppt->x;
y2 = ppt->y;
if (mode == CoordModePrevious)
{
x2 += x1;
y2 += y1;
}
fbSegment (pDrawable, pGC, x1 + x, y1 + y,
x2 + x, y2 + y,
npt == 1 && pGC->capStyle != CapNotLast,
&dashOffset);
x1 = x2;
y1 = y2;
}
}
void
fbZeroSegment (DrawablePtr pDrawable,
GCPtr pGC,
int nseg,
xSegment *pSegs)
{
int dashOffset;
int x, y;
Bool drawLast = pGC->capStyle != CapNotLast;
x = pDrawable->x;
y = pDrawable->y;
while (nseg--)
{
dashOffset = pGC->dashOffset;
fbSegment (pDrawable, pGC,
pSegs->x1 + x, pSegs->y1 + y,
pSegs->x2 + x, pSegs->y2 + y,
drawLast,
&dashOffset);
pSegs++;
}
}
void
fbFixCoordModePrevious (int npt,
DDXPointPtr ppt)
{
int x, y;
x = ppt->x;
y = ppt->y;
npt--;
while (npt--)
{
ppt++;
x = (ppt->x += x);
y = (ppt->y += y);
}
}
void
fbPolyLine (DrawablePtr pDrawable,
GCPtr pGC,
int mode,
int npt,
DDXPointPtr ppt)
{
void (*line) (DrawablePtr, GCPtr, int mode, int npt, DDXPointPtr ppt);
if (pGC->lineWidth == 0)
{
line = fbZeroLine;
#ifndef FBNOPIXADDR
if (pGC->fillStyle == FillSolid &&
pGC->lineStyle == LineSolid &&
REGION_NUM_RECTS (fbGetCompositeClip(pGC)) == 1)
{
switch (pDrawable->bitsPerPixel) {
case 8: line = fbPolyline8; break;
case 16: line = fbPolyline16; break;
#ifdef FB_24BIT
case 24: line = fbPolyline24; break;
#endif
case 32: line = fbPolyline32; break;
}
}
#endif
}
else
{
if (pGC->lineStyle != LineSolid)
line = miWideDash;
else
line = miWideLine;
}
(*line) (pDrawable, pGC, mode, npt, ppt);
}
void
fbPolySegment (DrawablePtr pDrawable,
GCPtr pGC,
int nseg,
xSegment *pseg)
{
void (*seg) (DrawablePtr pDrawable, GCPtr pGC, int nseg, xSegment *pseg);
if (pGC->lineWidth == 0)
{
seg = fbZeroSegment;
#ifndef FBNOPIXADDR
if (pGC->fillStyle == FillSolid &&
pGC->lineStyle == LineSolid &&
REGION_NUM_RECTS (fbGetCompositeClip(pGC)) == 1)
{
switch (pDrawable->bitsPerPixel) {
case 8: seg = fbPolySegment8; break;
case 16: seg = fbPolySegment16; break;
#ifdef FB_24BIT
case 24: seg = fbPolySegment24; break;
#endif
case 32: seg = fbPolySegment32; break;
}
}
#endif
}
else
{
seg = miPolySegment;
}
(*seg) (pDrawable, pGC, nseg, pseg);
}
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