PNG_PASS_ROW_OFFSET  267 contrib/examples/pngpixel.c                            ystep = PNG_PASS_ROW_OFFSET(pass);
PNG_PASS_ROW_OFFSET 2929 pngread.c                  stepy = PNG_PASS_ROW_OFFSET(pass);
PNG_PASS_ROW_OFFSET 3246 pngread.c                  stepy = PNG_PASS_ROW_OFFSET(pass);
PNG_PASS_ROW_OFFSET 3410 pngread.c                        stepy = PNG_PASS_ROW_OFFSET(pass);
PNG_PASS_ROW_OFFSET 3547 pngread.c                        stepy = PNG_PASS_ROW_OFFSET(pass);