1 /*========================================================================= 2 * 3 * Copyright Insight Software Consortium 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0.txt 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 *=========================================================================*/ 18 #ifndef itkImageRegionConstIteratorWithIndex_hxx 19 #define itkImageRegionConstIteratorWithIndex_hxx 20 21 #include "itkImageRegionConstIteratorWithIndex.h" 22 23 namespace itk 24 { 25 //---------------------------------------------------------------------- 26 // Advance along the line 27 //---------------------------------------------------------------------- 28 template< typename TImage > 29 ImageRegionConstIteratorWithIndex< TImage > & 30 ImageRegionConstIteratorWithIndex< TImage > operator ++()31::operator++() 32 { 33 this->m_Remaining = false; 34 for ( unsigned int in = 0; in < TImage::ImageDimension; in++ ) 35 { 36 this->m_PositionIndex[in]++; 37 if ( this->m_PositionIndex[in] < this->m_EndIndex[in] ) 38 { 39 this->m_Position += this->m_OffsetTable[in]; 40 this->m_Remaining = true; 41 break; 42 } 43 else 44 { 45 this->m_Position -= this->m_OffsetTable[in] 46 * ( static_cast< OffsetValueType >( this->m_Region.GetSize()[in] ) - 1 ); 47 this->m_PositionIndex[in] = this->m_BeginIndex[in]; 48 } 49 } 50 51 if ( !this->m_Remaining ) // It will not advance here otherwise 52 { 53 this->m_Position = this->m_End; 54 } 55 56 return *this; 57 } 58 59 //---------------------------------------------------------------------- 60 // Advance along the line in reverse direction 61 //---------------------------------------------------------------------- 62 template< typename TImage > 63 ImageRegionConstIteratorWithIndex< TImage > & 64 ImageRegionConstIteratorWithIndex< TImage > operator --()65::operator--() 66 { 67 this->m_Remaining = false; 68 for ( unsigned int in = 0; in < TImage::ImageDimension; in++ ) 69 { 70 if ( this->m_PositionIndex[in] > this->m_BeginIndex[in] ) 71 { 72 this->m_PositionIndex[in]--; 73 this->m_Position -= this->m_OffsetTable[in]; 74 this->m_Remaining = true; 75 break; 76 } 77 else 78 { 79 this->m_Position += this->m_OffsetTable[in] 80 * ( static_cast< OffsetValueType >( this->m_Region.GetSize()[in] ) - 1 ); 81 this->m_PositionIndex[in] = this->m_EndIndex[in] - 1; 82 } 83 } 84 85 if ( !this->m_Remaining ) // It will not advance here otherwise 86 { 87 this->m_Position = this->m_End; 88 } 89 90 return *this; 91 } 92 } // end namespace itk 93 94 #endif 95