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lightup: Ban 2x2 with either 4-way type

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(2x2 with four-way symmetry must be either all-black (trivial) or
all-white (ambiguous). --bjh21)

(cherry picked from Android port, commit
27ae898e118b0a31a98d393bf56aa138845123e6)
This commit is contained in:
Chris Boyle
2016-12-20 23:48:01 +00:00
committed by Ben Harris
parent a46bbae7c1
commit cbf2ede64a
1 changed files with 2 additions and 0 deletions
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2
lightup.c
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@ -353,6 +353,8 @@ static const char *validate_params(const game_params *params, bool full)
if (params->symm == SYMM_ROT4) if (params->symm == SYMM_ROT4)
return "4-fold symmetry is only available with square grids"; 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) if (params->symm < 0 || params->symm >= SYMM_MAX)
return "Unknown symmetry type"; return "Unknown symmetry type";
if (params->difficulty < 0 || params->difficulty > DIFFCOUNT) if (params->difficulty < 0 || params->difficulty > DIFFCOUNT)