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Reduce the number of accesses to coord cache when drawing a math row

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Each of these accesses is somewhat costly when using large branches
with lots of maths

Related to bug #12297.
This commit is contained in:
Jean-Marc Lasgouttes 2021-10-08 17:38:25 +02:00
parent e09158efee
commit e5bb491e2e
2 changed files with 13 additions and 9 deletions
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6
src/CoordCache.h
View File

@ -80,6 +80,12 @@ public:
data_[thing].dim = dim;
}
Geometry & geometry(T const * thing)
{
check(thing, "geometry");
return data_.find(thing)->second;
}
Geometry const & geometry(T const * thing) const
{
check(thing, "geometry");

16
src/mathed/MathRow.cpp
View File

@ -322,18 +322,16 @@ void MathRow::draw(PainterInfo & pi, int x, int const y) const
// This is hackish: the math inset does not know that space
// has been added before and after it; we alter its dimension
// while it is drawing, because it relies on this value.
Dimension const d = coords.insets().dim(e.inset);
Dimension d2 = d;
d2.wid -= e.before + e.after;
coords.insets().add(e.inset, d2);
Geometry & g = coords.insets().geometry(e.inset);
g.dim.wid -= e.before + e.after;
if (pi.pain.develMode() && !e.inset->isBufferValid())
pi.pain.fillRectangle(x + e.before, y - d2.ascent(),
d2.width(), d2.height(), Color_error);
pi.pain.fillRectangle(x + e.before, y - g.dim.ascent(),
g.dim.width(), g.dim.height(), Color_error);
e.inset->draw(pi, x + e.before, y);
coords.insets().add(e.inset, x, y);
coords.insets().add(e.inset, d);
g.pos = {x, y};
g.dim.wid += e.before + e.after;
drawMarkers(pi, e, x, y);
x += d.wid;
x += g.dim.wid;
break;
}
case BEGIN: