Mercurial > hg > orthanc

comparison Core/DicomFormat/DicomIntegerPixelAccessor.cpp @ 465:7a966b440f19

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signed images to PNG
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 12 Jul 2013 11:15:27 +0200
parents 5987dd8e0776
children 2890721b0f57
comparison
equal deleted inserted replaced
464:5987dd8e0776 465:7a966b440f19
243 v = v >> shift_; 243 v = v >> shift_;
244 244
245 if (v & signMask_) 245 if (v & signMask_)
246 { 246 {
247 // Signed value 247 // Signed value
248 return -static_cast<int32_t>(v & mask_); 248 // http://en.wikipedia.org/wiki/Two%27s_complement#Subtraction_from_2N
249 return -static_cast<int32_t>(mask_) + static_cast<int32_t>(v & mask_) - 1;
249 } 250 }
250 else 251 else
251 { 252 {
252 // Unsigned value 253 // Unsigned value
253 return static_cast<int32_t>(v & mask_); 254 return static_cast<int32_t>(v & mask_);