diff options
Diffstat (limited to 'editor/pamflip.c')
| -rw-r--r-- | editor/pamflip.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/editor/pamflip.c b/editor/pamflip.c index e47daf36..87f57809 100644 --- a/editor/pamflip.c +++ b/editor/pamflip.c @@ -443,8 +443,9 @@ transformRowByRowPbm(struct pam * const inpamP, struct pam * const outpamP, bool const reverse) { /*---------------------------------------------------------------------------- - Transform a PBM image either by flipping it left for right, or just leaving - it alone, as indicated by 'reverse'. + Transform a PBM raster either by flipping it left for right, or just + leaving it alone, as indicated by 'reverse'. Read the raster from + *inpamP; write the transformed raster to *outpamP. Process the image one row at a time and use fast packed PBM bit reverse algorithm (where required). @@ -454,8 +455,6 @@ transformRowByRowPbm(struct pam * const inpamP, bitrow = pbm_allocrow_packed(outpamP->width); - pbm_writepbminit(outpamP->file, outpamP->width, outpamP->height, 0); - for (row = 0; row < inpamP->height; ++row) { pbm_readpbmrow_packed(inpamP->file, bitrow, inpamP->width, inpamP->format); @@ -475,7 +474,8 @@ transformRowByRowNonPbm(struct pam * const inpamP, struct pam * const outpamP, bool const reverse) { /*---------------------------------------------------------------------------- - Flip an image left for right or leave it alone. + Flip a raster left for right or leave it alone. Read the raster + from *inpamP; write the transformed raster to *outpamP. Process one row at a time. @@ -526,7 +526,8 @@ transformRowsBottomTopPbm(struct pam * const inpamP, struct pam * const outpamP, bool const reverse) { /*---------------------------------------------------------------------------- - Flip a PBM image top for bottom. + Flip a PBM raster top for bottom; read the raster from *inpamP; + write the flipped raster to *outpamP. Read complete image into memory in packed PBM format; Use fast packed PBM bit reverse algorithm (where required). @@ -534,7 +535,7 @@ transformRowsBottomTopPbm(struct pam * const inpamP, unsigned int const rows=inpamP->height; unsigned char ** bitrow; - int row; + unsigned int row; bitrow = pbm_allocarray_packed(outpamP->width, outpamP->height); @@ -542,8 +543,6 @@ transformRowsBottomTopPbm(struct pam * const inpamP, pbm_readpbmrow_packed(inpamP->file, bitrow[row], inpamP->width, inpamP->format); - pbm_writepbminit(outpamP->file, outpamP->width, outpamP->height, 0); - for (row = 0; row < rows; ++row) { if (reverse) bitOrderReverse(bitrow[rows-row-1], inpamP->width); @@ -560,7 +559,8 @@ static void transformRowsBottomTopNonPbm(struct pam * const inpamP, struct pam * const outpamP) { /*---------------------------------------------------------------------------- - Do a simple vertical flip. + Do a simple vertical flip. Read the raster from *inpamP; write the + flipped raster to *outpamP. We do this faster than the more general subroutines because we just move the row pointers. @@ -677,7 +677,6 @@ transformPbmGen(struct pam * const inpamP, } } - pbm_writepbminit(outpamP->file, outpamP->width, outpamP->height, 0); for (row = 0; row < outpamP->height; ++row) pbm_writepbmrow_packed(outpamP->file, newbits[row], outpamP->width, 0); @@ -696,6 +695,8 @@ transformNonPbmWhole(struct pam * const inpamP, Do the transform using "pam" library functions, as opposed to "pbm" ones. + Read the raster from *inpamP; write the transformed raster to *outpamP. + Assume input file is positioned to the raster (just after the header). |