- memcpy(line, pixels + pitch*ybegin, pitch);
- memcpy(pixels + pitch*ybegin, pixels + pitch*yend, pitch);
- memcpy(pixels + pitch*yend, line, pitch);
+ memcpy(line, pixels + pitch * ybegin, pitch);
+ memcpy(pixels + pitch * ybegin, pixels + pitch * yend, pitch);
+ memcpy(pixels + pitch * yend, line, pitch);