for (int i = 0; i < image->components(); ++i) {
int const line_size = image->line_size()[i];
int const half_line_size = line_size / 2;
for (int i = 0; i < image->components(); ++i) {
int const line_size = image->line_size()[i];
int const half_line_size = line_size / 2;
uint8_t* p = _image->data()[i];
uint8_t* q = image->data()[i];
for (int j = 0; j < image->lines (i); ++j) {
memcpy (p + half_line_size, q + half_line_size, half_line_size);
uint8_t* p = _image->data()[i];
uint8_t* q = image->data()[i];
for (int j = 0; j < image->lines (i); ++j) {
memcpy (p + half_line_size, q + half_line_size, half_line_size);