diff options
| -rw-r--r-- | editor/pnmpad.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/editor/pnmpad.c b/editor/pnmpad.c index ae1abc1f..94ea0ed1 100644 --- a/editor/pnmpad.c +++ b/editor/pnmpad.c @@ -855,14 +855,25 @@ regressColor(int const format, xel retval; - if (format == PBM_TYPE) { + switch (PNM_FORMAT_TYPE(format)) { + case PBM_TYPE: + { gray const threshold = maxval / 2; retval = grayval > threshold ? pnm_whitexel(maxval, format) : pnm_blackxel(maxval, format); - } else { /* PGM_TYPE */ + } + break; + case PGM_TYPE: retval.b = grayval; retval.r = retval.g = 0; + break; + case PPM_TYPE: + retval = color; + break; + default: + pm_error("internal error -- impossible value of PNM format " + "type in regressColor"); } return retval; } |