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mri_scale.c File Reference
#include "mrilib.h"Go to the source code of this file.
Functions | |
| void | mri_scale_inplace (float fac, MRI_IMAGE *im) |
Function Documentation
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27 Nov 2001: mri_scale.c * Definition at line 7 of file mri_scale.c. References ENTRY, complex::i, MRI_IMAGE::kind, mri_data_pointer(), MRI_IMAGE::nvox, and complex::r. Referenced by mri_read3D_analyze75(), and mri_read_analyze75().
00008 {
00009 register int ii , nvox ;
00010 void *vp ;
00011
00012 ENTRY("mri_scale_inplace") ;
00013
00014 if( im == NULL || fac == 1.0 || fac == 0.0 ) EXRETURN ;
00015 vp = mri_data_pointer( im ) ; if( vp == NULL ) EXRETURN ;
00016 nvox = im->nvox ;
00017
00018 switch( im->kind ){
00019
00020 case MRI_byte:{
00021 byte *pp = (byte *) vp ;
00022 for( ii=0 ; ii < nvox ; ii++ ) pp[ii] *= fac ;
00023 }
00024 break ;
00025
00026 case MRI_short:{
00027 short *pp = (short *) vp ;
00028 for( ii=0 ; ii < nvox ; ii++ ) pp[ii] *= fac ;
00029 }
00030 break ;
00031
00032 case MRI_float:{
00033 float *pp = (float *) vp ;
00034 for( ii=0 ; ii < nvox ; ii++ ) pp[ii] *= fac ;
00035 }
00036 break ;
00037
00038 case MRI_int:{
00039 int *pp = (int *) vp ;
00040 for( ii=0 ; ii < nvox ; ii++ ) pp[ii] *= fac ;
00041 }
00042 break ;
00043
00044 case MRI_double:{
00045 double *pp = (double *) vp ;
00046 for( ii=0 ; ii < nvox ; ii++ ) pp[ii] *= fac ;
00047 }
00048 break ;
00049
00050 case MRI_complex:{
00051 complex *pp = (complex *) vp ;
00052 for( ii=0 ; ii < nvox ; ii++ ){
00053 pp[ii].r *= fac; pp[ii].i *= fac;
00054 }
00055 }
00056 break ;
00057
00058 case MRI_rgb:{
00059 byte *pp = (byte *) vp ;
00060 nvox *= 3 ;
00061 for( ii=0 ; ii < nvox ; ii++ ) pp[ii] *= fac ;
00062 }
00063 break ;
00064 }
00065
00066 EXRETURN ;
00067 }
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