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Issue #2090 - Crash when using transform tools

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In GimpTransformGridTool, avoid producing non-finite coordinate
and angle values.  In particular, this fixes a crash in
gimp_transform_grid_tool_get_cursor() as a result of a NaN angle
value being converted to a negative integer, hitting an assert.

(cherry picked from commit be7906c05c)
This commit is contained in:
Ell
2019-03-30 11:11:10 -04:00
parent 4d2a5d1a94
commit 9c9467e076
1 changed files with 18 additions and 8 deletions
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26
app/display/gimptooltransformgrid.c
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@ -887,11 +887,11 @@ calcangle (GimpVector2 a,
length = norm (a) * norm (b);
angle = acos (dotprod (a, b)/length);
angle = acos (SAFE_CLAMP (dotprod (a, b) / length, -1.0, +1.0));
angle2 = b.y;
b.y = -b.x;
b.x = angle2;
angle2 = acos (dotprod (a, b)/length);
angle2 = acos (SAFE_CLAMP (dotprod (a, b) / length, -1.0, +1.0));
return ((angle2 > G_PI / 2.0) ? angle : 2.0 * G_PI - angle);
}
@ -1750,12 +1750,6 @@ gimp_tool_transform_grid_motion (GimpToolWidget *widget,
}
}
for (i = 0; i < 4; i++)
{
*x[i] = newpos[i].x;
*y[i] = newpos[i].y;
}
/* this will have been set to TRUE if an operation used the pivot in
* addition to being a user option
*/
@ -1768,6 +1762,22 @@ gimp_tool_transform_grid_motion (GimpToolWidget *widget,
pivot = vectoradd (pivot, delta);
}
/* make sure the new coordinates are valid */
for (i = 0; i < 4; i++)
{
if (! isfinite (newpos[i].x) || ! isfinite (newpos[i].y))
return;
}
if (! isfinite (pivot.x) || ! isfinite (pivot.y))
return;
for (i = 0; i < 4; i++)
{
*x[i] = newpos[i].x;
*y[i] = newpos[i].y;
}
/* set unconditionally: if options get toggled during operation, we
* have to move pivot back
*/