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authorpsykose <alice@ayaya.dev>2022-05-24 10:02:03 +0000
committerpsykose <alice@ayaya.dev>2022-05-24 12:02:03 +0200
commit419b1f3434971a3ae4ea52e17775f283627da73f (patch)
tree22b964f821cfb88eb51073eea5cd944dc38d01a9 /main/cairo/fix-inf-loop.patch
parent867b83452b867d5b31d3f714f7cffebeae19a840 (diff)
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main/cairo: actually apply inf-loop patch
Diffstat (limited to 'main/cairo/fix-inf-loop.patch')
-rw-r--r--main/cairo/fix-inf-loop.patch36
1 files changed, 36 insertions, 0 deletions
diff --git a/main/cairo/fix-inf-loop.patch b/main/cairo/fix-inf-loop.patch
new file mode 100644
index 0000000000..2a26876c36
--- /dev/null
+++ b/main/cairo/fix-inf-loop.patch
@@ -0,0 +1,36 @@
+From bbeaf08190d3006a80b80a77724801cd477a37b8 Mon Sep 17 00:00:00 2001
+From: Heiko Lewin <hlewin@worldiety.de>
+Date: Sat, 17 Apr 2021 19:15:03 +0200
+Subject: [PATCH] _arc_max_angle_for_tolerance_normalized: fix infinite loop
+
+---
+ src/cairo-arc.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/src/cairo-arc.c b/src/cairo-arc.c
+index 390397bae..1c891d1a0 100644
+--- a/src/cairo-arc.c
++++ b/src/cairo-arc.c
+@@ -90,16 +90,18 @@ _arc_max_angle_for_tolerance_normalized (double tolerance)
+ { M_PI / 11.0, 9.81410988043554039085e-09 },
+ };
+ int table_size = ARRAY_LENGTH (table);
++ const int max_segments = 1000; /* this value is chosen arbitrarily. this gives an error of about 1.74909e-20 */
+
+ for (i = 0; i < table_size; i++)
+ if (table[i].error < tolerance)
+ return table[i].angle;
+
+ ++i;
++
+ do {
+ angle = M_PI / i++;
+ error = _arc_error_normalized (angle);
+- } while (error > tolerance);
++ } while (error > tolerance && i < max_segments);
+
+ return angle;
+ }
+--
+GitLab
+