-/**
- * \brief Swap the bytes, according to swap code.
- * \warning not end user intended
- * @param im area to deal with
- * @param swap swap code
- * @param lgr Area Length
- * @param nb Pixels Bit number
- */
-void gdcmFile::SwapZone(void* im, int swap, int lgr, int nb)
-{
- int i;
-
- if( nb == 16 )
- {
- uint16_t* im16 = (uint16_t*)im;
- switch( swap )
- {
- case 0:
- case 12:
- case 1234:
- break;
- case 21:
- case 3412:
- case 2143:
- case 4321:
- for(i=0; i < lgr/2; i++)
- {
- im16[i]= (im16[i] >> 8) | (im16[i] << 8 );
- }
- break;
- default:
- std::cout << "SWAP value (16 bits) not allowed :i" << swap <<
- std::endl;
- }
- }
- else if( nb == 32 )
- {
- uint32_t s32;
- uint16_t fort, faible;
- uint32_t* im32 = (uint32_t*)im;
- switch ( swap )
- {
- case 0:
- case 1234:
- break;
- case 4321:
- for(i = 0; i < lgr/4; i++)
- {
- faible = im32[i] & 0x0000ffff; // 4321
- fort = im32[i] >> 16;
- fort = ( fort >> 8 ) | ( fort << 8 );
- faible = ( faible >> 8 ) | ( faible << 8);
- s32 = faible;
- im32[i] = ( s32 << 16 ) | fort;
- }
- break;
- case 2143:
- for(i = 0; i < lgr/4; i++)
- {
- faible = im32[i] & 0x0000ffff; // 2143
- fort = im32[i] >> 16;
- fort = ( fort >> 8 ) | ( fort << 8 );
- faible = ( faible >> 8) | ( faible << 8);
- s32 = fort;
- im32[i] = ( s32 << 16 ) | faible;
- }
- break;
- case 3412:
- for(i = 0; i < lgr/4; i++)
- {
- faible = im32[i] & 0x0000ffff; // 3412
- fort = im32[i] >> 16;
- s32 = faible;
- im32[i] = ( s32 << 16 ) | fort;
- }
- break;
- default:
- std::cout << "SWAP value (32 bits) not allowed : " << swap <<
- std::endl;
- }
- }
-}
-