diff options
Diffstat (limited to 'converter/other/hdifftopam.c')
| -rw-r--r-- | converter/other/hdifftopam.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/converter/other/hdifftopam.c b/converter/other/hdifftopam.c index c9363040..7464bb1a 100644 --- a/converter/other/hdifftopam.c +++ b/converter/other/hdifftopam.c @@ -1,7 +1,7 @@ /****************************************************************************** hdifftopam ******************************************************************************* - This program recovers a PAM image from a horizontal difference images + This program recovers a PAM image from a horizontal difference images such as created by Pamtohdiff. By Bryan Henderson, San Jose, CA 2002.04.15. @@ -64,7 +64,7 @@ static void makePnm(struct pam * const pamP) { switch (pamP->depth) { - case 1: + case 1: pamP->format = PGM_FORMAT; break; case 3: @@ -87,7 +87,7 @@ static void -int +int main(int argc, char *argv[]) { FILE *ifP; struct cmdlineInfo cmdline; @@ -105,9 +105,9 @@ main(int argc, char *argv[]) { pnm_readpaminit(ifP, &diffpam, PAM_STRUCT_SIZE(tuple_type)); - if (diffpam.format != PAM_FORMAT) + if (diffpam.format != PAM_FORMAT) pm_error("Input must be a PAM file, not PNM"); - else if (!streq(diffpam.tuple_type, "hdiff")) + else if (!streq(diffpam.tuple_type, "hdiff")) pm_error("Input tuple type is '%s'. Must be 'hdiff'", diffpam.tuple_type); @@ -130,7 +130,7 @@ main(int argc, char *argv[]) { { unsigned int const bias = diffpam.maxval/2; - + for (row = 0; row < diffpam.height; ++row) { unsigned int col; pnm_readpamrow(&diffpam, diffrow); @@ -139,8 +139,8 @@ main(int argc, char *argv[]) { for (plane = 0; plane < diffpam.depth; ++plane) { sample const prevSample = prevrow[col][plane]; sample const diffSample = diffrow[col][plane]; - - outrow[col][plane] = + + outrow[col][plane] = (-bias + prevSample + diffSample) % (outpam.maxval+1); prevrow[col][plane] = outrow[col][plane]; } @@ -155,3 +155,5 @@ main(int argc, char *argv[]) { exit(0); } + + |