[librsvg: 1/2] (#698): Put limit on feMorphology radii to prevent thread hang

[Federico Mena Quintero <federico src gnome org>]

commit 432915744376d83f212212254c63b68e57c2092a
Author: Madds <madds hollandart io>
Date:   Sat Apr 10 22:55:36 2021 -0500

    (#698): Put limit on feMorphology radii to prevent thread hang
    
    Limits feMorphology radii to 10.0, a somewhat arbitrary number that I attempted to balance quickly (on a 
Ryzen system) opening eog and having a wide range for the effect.
    The examples for radius size I could find only had it go as high as 3, so I figured 10 would be safe.
    If there's something I've done wrong, or how I implemented it is odd for rust's conventions please let me 
know!
    
    https://gitlab.gnome.org/GNOME/librsvg/-/issues/698

 src/filters/morphology.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/filters/morphology.rs b/src/filters/morphology.rs
index 073fdcf8..ec6e753f 100644
--- a/src/filters/morphology.rs
+++ b/src/filters/morphology.rs
@@ -97,7 +97,8 @@ impl Morphology {
         let (rx, ry) = ctx.paffine().transform_distance(rx, ry);
 
         // The radii can become negative here due to the transform.
-        let (rx, ry) = (rx.abs(), ry.abs());
+        // Additionally The radii being excessively large causes cpu hangups
+        let (rx, ry) = (rx.abs().min(10.0), ry.abs().min(10.0));
 
         let mut surface = ExclusiveImageSurface::new(
             ctx.source_graphic().width(),