diff options
Diffstat (limited to 'lib/libpnm3.c')
| -rw-r--r-- | lib/libpnm3.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/lib/libpnm3.c b/lib/libpnm3.c index 3970c734..4d88a2c1 100644 --- a/lib/libpnm3.c +++ b/lib/libpnm3.c @@ -106,10 +106,14 @@ pnm_backgroundxelrow(xel * const xelrow, int const cols, xelval const maxval, int const format) { +/*---------------------------------------------------------------------------- + Guess a good background color for an image that contains row 'xelrow' + (probably top or bottom edge). + 'cols', 'maxval', and 'format' describe 'xelrow'. +-----------------------------------------------------------------------------*/ xel bgxel, l, r; - /* Guess a good background value. */ l = xelrow[0]; r = xelrow[cols-1]; @@ -236,6 +240,19 @@ pnm_invertxel(xel* const xP, +const char * +pnm_formattypenm(int const format) { + + switch (PPM_FORMAT_TYPE(format)) { + case PPM_TYPE: return "PPM"; break; + case PGM_TYPE: return "PGM"; break; + case PBM_TYPE: return "PBM"; break; + default: return "???"; + } +} + + + void pnm_promoteformat(xel ** const xels, int const cols, |