xenocara/xserver/fb/fbline.c

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/*
* 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.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "fb.h"
static void
fbZeroLine(DrawablePtr pDrawable, GCPtr pGC, int mode, int npt, DDXPointPtr ppt)
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{
int x1, y1, x2, y2;
int x, y;
int dashOffset;
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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;
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}
}
static void
fbZeroSegment(DrawablePtr pDrawable, GCPtr pGC, int nseg, xSegment * pSegs)
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{
int dashOffset;
int x, y;
Bool drawLast = pGC->capStyle != CapNotLast;
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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++;
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}
}
void
fbFixCoordModePrevious(int npt, DDXPointPtr ppt)
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{
int x, y;
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x = ppt->x;
y = ppt->y;
npt--;
while (npt--) {
ppt++;
x = (ppt->x += x);
y = (ppt->y += y);
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}
}
void
fbPolyLine(DrawablePtr pDrawable, GCPtr pGC, int mode, int npt, DDXPointPtr ppt)
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{
void (*line) (DrawablePtr, GCPtr, int mode, int npt, DDXPointPtr ppt);
if (pGC->lineWidth == 0) {
line = fbZeroLine;
if (pGC->fillStyle == FillSolid &&
pGC->lineStyle == LineSolid &&
RegionNumRects(fbGetCompositeClip(pGC)) == 1) {
switch (pDrawable->bitsPerPixel) {
case 8:
line = fbPolyline8;
break;
case 16:
line = fbPolyline16;
break;
case 24:
line = fbPolyline24;
break;
case 32:
line = fbPolyline32;
break;
}
}
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}
else {
if (pGC->lineStyle != LineSolid)
line = miWideDash;
else
line = miWideLine;
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}
(*line) (pDrawable, pGC, mode, npt, ppt);
}
void
fbPolySegment(DrawablePtr pDrawable, GCPtr pGC, int nseg, xSegment * pseg)
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{
void (*seg) (DrawablePtr pDrawable, GCPtr pGC, int nseg, xSegment * pseg);
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if (pGC->lineWidth == 0) {
seg = fbZeroSegment;
if (pGC->fillStyle == FillSolid &&
pGC->lineStyle == LineSolid &&
RegionNumRects(fbGetCompositeClip(pGC)) == 1) {
switch (pDrawable->bitsPerPixel) {
case 8:
seg = fbPolySegment8;
break;
case 16:
seg = fbPolySegment16;
break;
case 24:
seg = fbPolySegment24;
break;
case 32:
seg = fbPolySegment32;
break;
}
}
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}
else {
seg = miPolySegment;
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}
(*seg) (pDrawable, pGC, nseg, pseg);
}