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Fix antialiasing problem in straight lines within polylines. Prepare for optional antialiasing.

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* QLPainter::lines(): use QPainter::drawLine() multiple times instead QPainter::drawPolyline().

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18196 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Abdelrazak Younes 2007-05-04 08:52:40 +00:00
parent 5221ba70b0
commit 58cc6d28e8
1 changed files with 11 additions and 18 deletions
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29
src/frontends/qt4/QLPainter.cpp
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@ -98,7 +98,8 @@ void QLPainter::line(int x1, int y1, int x2, int y2,
return;
setQPainterPen(col, ls, lw);
setRenderHint(Antialiasing, x1 != x2 && y1 != y2);
bool const do_antialiasing = x1 != x2 && y1 != y2;
setRenderHint(Antialiasing, do_antialiasing);
drawLine(x1, y1, x2, y2);
setRenderHint(Antialiasing, false);
}
@ -109,26 +110,17 @@ void QLPainter::lines(int const * xp, int const * yp, int np,
line_style ls,
line_width lw)
{
// FIXME ?
// Must use new as np is not known at compile time.
boost::scoped_array<QPoint> points(new QPoint[np]);
bool antialias = false;
for (int i = 0; i < np; ++i) {
points[i].setX(xp[i]);
points[i].setY(yp[i]);
if (i != 0)
antialias |= xp[i-1] != xp[i] && yp[i-1] != yp[i];
}
if (!isDrawingEnabled())
return;
setQPainterPen(col, ls, lw);
setRenderHint(Antialiasing, antialias);
drawPolyline(points.get(), np);
setRenderHint(Antialiasing, false);
for (int i = 1; i < np; ++i) {
bool const do_antialiasing = false &&
xp[i-1] != xp[i] && yp[i-1] != yp[i];
setRenderHint(Antialiasing, do_antialiasing);
drawLine(xp[i-1], yp[i-1], xp[i], yp[i]);
setRenderHint(Antialiasing, false);
}
}
@ -159,7 +151,8 @@ void QLPainter::arc(int x, int y, unsigned int w, unsigned int h,
// LyX usings 1/64ths degree, Qt usings 1/16th
setQPainterPen(col);
setRenderHint(Antialiasing, true);
bool const do_antialiasing = true;
setRenderHint(Antialiasing, do_antialiasing);
drawArc(x, y, w, h, a1 / 4, a2 / 4);
setRenderHint(Antialiasing, false);
}