PNG_PASS_COL_OFFSET  266 contrib/examples/pngpixel.c                            xstep = PNG_PASS_COL_OFFSET(pass);
PNG_PASS_COL_OFFSET 2927 pngread.c                  stepx = PNG_PASS_COL_OFFSET(pass);
PNG_PASS_COL_OFFSET 3244 pngread.c                  stepx = PNG_PASS_COL_OFFSET(pass) * channels;
PNG_PASS_COL_OFFSET 3408 pngread.c                        stepx = PNG_PASS_COL_OFFSET(pass);
PNG_PASS_COL_OFFSET 3545 pngread.c                        stepx = PNG_PASS_COL_OFFSET(pass) * outchannels;
PNG_PASS_COL_OFFSET 3283 pngrutil.c              bytes_to_jump = PNG_PASS_COL_OFFSET(pass) * pixel_depth;