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authorChris Boyle <chris@boyle.name>2016-12-20 23:48:01 +0000
committerBen Harris <bjh21@bjh21.me.uk>2022-12-16 02:09:44 +0000
commitcbf2ede64ad91346e6399603ff7b8df432be5a06 (patch)
treeb1b5104c437c4aafc2c4dadf69ac916ff3a345c3 /lightup.c
parenta46bbae7c16595e6f5eb02add637da337a1f075a (diff)
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lightup: Ban 2x2 with either 4-way type
(2x2 with four-way symmetry must be either all-black (trivial) or all-white (ambiguous). --bjh21) (cherry picked from Android port, commit 27ae898e118b0a31a98d393bf56aa138845123e6)
Diffstat (limited to 'lightup.c')
-rw-r--r--lightup.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/lightup.c b/lightup.c
index b559665..d3b4b50 100644
--- a/lightup.c
+++ b/lightup.c
@@ -353,6 +353,8 @@ static const char *validate_params(const game_params *params, bool full)
if (params->symm == SYMM_ROT4)
return "4-fold symmetry is only available with square grids";
}
+ if ((params->symm == SYMM_ROT4 || params->symm == SYMM_REF4) && params->w < 3 && params->h < 3)
+ return _("Width or height must be at least 3 for 4-way symmetry");
if (params->symm < 0 || params->symm >= SYMM_MAX)
return "Unknown symmetry type";
if (params->difficulty < 0 || params->difficulty > DIFFCOUNT)