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|
unit nifti_hdr_view;
interface
{$H+}
uses
{$IFNDEF FPC}
RXSpin,capmenu,
{$ELSE}
LResources, Spin,
{$ENDIF}
{$IFNDEF Unix} ShellAPI, {$ENDIF}
SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, nifti_hdr, Menus, ComCtrls, define_types;
type
{ THdrForm }
THdrForm = class(TForm)
Ymm: TFloatSpinEdit;
MainMenu1: TMainMenu;
File1: TMenuItem;
Open1: TMenuItem;
Exit1: TMenuItem;
Save1: TMenuItem;
Help1: TMenuItem;
About1: TMenuItem;
OpenHdrDlg: TOpenDialog;
SaveHdrDlg: TSaveDialog;
PageControl1: TPageControl;
TabRequired: TTabSheet;
TabUnused: TTabSheet;
intent_nameEdit: TEdit;
data_typeEdit: TEdit;
CommentEdit: TEdit;
db_: TEdit;
aux: TEdit;
gmax: TSpinEdit;
gmin: TSpinEdit;
ses: TSpinEdit;
ext: TSpinEdit;
reg: TSpinEdit;
Label34: TLabel;
Label5: TLabel;
Label6: TLabel;
Label9: TLabel;
Label10: TLabel;
Label14: TLabel;
Label15: TLabel;
Label18: TLabel;
Label19: TLabel;
Label26: TLabel;
HeaderMagicDrop: TComboBox;
Label21: TLabel;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Label4: TLabel;
Label8: TLabel;
Label7: TLabel;
Endian: TComboBox;
fTypeDrop: TComboBox;
Label44: TLabel;
xyzt_sizeDrop: TComboBox;
xyzt_timeDrop: TComboBox;
Xdim: TSpinEdit;
Ydim: TSpinEdit;
Zdim: TSpinEdit;
Zmm: TFloatSpinEdit;
OffsetEdit: TSpinEdit;
TDim: TSpinEdit;
Xmm: TFloatSpinEdit;
TSec: TFloatSpinEdit;
StatusBar1: TStatusBar;
Label29: TLabel;
Dim5Edit: TSpinEdit;
TabSheet1: TTabSheet;
Label35: TLabel;
IntentCodeDrop: TComboBox;
intent_p1Edit: TFloatSpinEdit;
intent_p2Edit: TFloatSpinEdit;
intent_p3Edit: TFloatSpinEdit;
Label25: TLabel;
Label27: TLabel;
Label28: TLabel;
TabSheet2: TTabSheet;
Label11: TLabel;
Label16: TLabel;
Label17: TLabel;
Label32: TLabel;
slice_startEdit: TSpinEdit;
Slice_durationEdit: TFloatSpinEdit;
toffsetEdit: TFloatSpinEdit;
TabSheet3: TTabSheet;
cmax: TFloatSpinEdit;
cmin: TFloatSpinEdit;
Label12: TLabel;
Label13: TLabel;
Scale: TFloatSpinEdit;
Label23: TLabel;
Intercept: TFloatSpinEdit;
Label22: TLabel;
Label30: TLabel;
Label33: TLabel;
Page1: TMenuItem;
Dimensions1: TMenuItem;
ImageIntensity1: TMenuItem;
Statistics1: TMenuItem;
FunctionalMRI1: TMenuItem;
Optional1: TMenuItem;
TabSheet4: TTabSheet;
Rotations1: TMenuItem;
srow_x0Edit: TFloatSpinEdit;
srow_x1Edit: TFloatSpinEdit;
srow_x2Edit: TFloatSpinEdit;
Label24: TLabel;
Label36: TLabel;
Label37: TLabel;
srow_y0Edit: TFloatSpinEdit;
srow_y1Edit: TFloatSpinEdit;
srow_y2Edit: TFloatSpinEdit;
srow_z0Edit: TFloatSpinEdit;
srow_z1Edit: TFloatSpinEdit;
srow_z2Edit: TFloatSpinEdit;
srow_x3Edit: TFloatSpinEdit;
srow_y3Edit: TFloatSpinEdit;
srow_z3Edit: TFloatSpinEdit;
quatern_bEdit: TFloatSpinEdit;
quatern_cEdit: TFloatSpinEdit;
quatern_dEdit: TFloatSpinEdit;
qoffset_xEdit: TFloatSpinEdit;
qoffset_yEdit: TFloatSpinEdit;
qoffset_zEdit: TFloatSpinEdit;
Label39: TLabel;
Label40: TLabel;
Label41: TLabel;
Dim6Edit: TSpinEdit;
Label42: TLabel;
Dim7Edit: TSpinEdit;
PixDim5: TFloatSpinEdit;
PixDim6: TFloatSpinEdit;
PixDim7: TFloatSpinEdit;
SliceCodeDrop: TComboBox;
Label20: TLabel;
slice_endEdit: TSpinEdit;
FreqDimDrop: TComboBox;
PhaseDimDrop: TComboBox;
SliceDimDrop: TComboBox;
Label31: TLabel;
Label43: TLabel;
Label45: TLabel;
QFacEdit: TFloatSpinEdit;
Label46: TLabel;
QFormDrop: TComboBox;
SFormDrop: TComboBox;
Label38: TLabel;
Label47: TLabel;
//procedure FormShow(Sender: TObject);
procedure SaveHdrDlgClose(Sender: TObject);
procedure WriteHdrForm (var lHdr: TMRIcroHdr);
procedure ReadHdrDimensionsOnly (var lHdr: TMRIcroHdr); //reads only size dimensions: useful for computing estimated filesize
procedure ReadHdrForm (var lHdr: TMRIcroHdr); //reads entire header
procedure About1Click(Sender: TObject);
procedure Open1Click(Sender: TObject);
procedure Save1Click(Sender: TObject);
procedure TabMenuClick(Sender: TObject);
procedure Exit1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure ImageSzChange(Sender: TObject);
procedure HeaderMagicDropSelect(Sender: TObject);
function OpenAndDisplayHdr (var lFilename: string; var lHdr: TMRIcroHdr): boolean;
//procedure ReadXForm (var lHdr: TMRIcroHdr);
private
{ Private declarations }
{$IFNDEF FPC} procedure WMDropFiles(var Msg: TWMDropFiles); message WM_DROPFILES;
{$ENDIF}
public
{ Public declarations }
end;
function OpenDialogExecute (lFilter,lCaption: string; lAllowMultiSelect: boolean): boolean;
var
HdrForm: THdrForm;
implementation
uses nifti_img_view, render,nifti_img;
{$IFNDEF FPC}
{$R *.DFM}
{$ENDIF}
function OpenDialogExecute (lFilter,lCaption: string; lAllowMultiSelect: boolean): boolean;
begin
HdrForm.OpenHdrDlg.Filter := lFilter;
HdrForm.OpenHdrDlg.FilterIndex := 1;
HdrForm.OpenHdrDlg.Title := lCaption;
if lAllowMultiSelect then
HdrForm.OpenHdrDlg.Options := [ofAllowMultiSelect,ofFileMustExist];
result := HdrForm.OpenHdrDlg.Execute;
HdrForm.OpenHdrDlg.Options := [ofFileMustExist];
end;
function DropItem2DataType(lItemIndex: integer): integer; //returns NIfTI datatype number
begin
case lItemIndex of
0: result :=1; //binary
1 : result := 256; //8-bit S
2 : result := 2; //8-bit int U*
3 : result := 4; //16-bit int S*
4 : result := 512; //16-bit int U
5 : result := 8; //32-bit int S*
6 : result := 768; //32-bit int U
7: result := 1024; //64-bit int S
8: result := 1280; //64-bit int U
9: result := 16; //32-bit real*
10: result := 64; //64-bit real*
11: result := 1536; //128-bit real
12: result := 128; //24-bit rgb
13: result := 32; //64-bit complex
14: result := 1792; //128-bit complex
15: result := 2048; //256-bit complex
else
result := 0;
end; //case
end; //func DropItem2DataType
function DataType2DropItem (lDataType: smallint): integer;
begin
case lDataType of
1: result := 0; //binary
256: result := 1; //8-bit S
2: result := 2; //8-bit int U*
4: result := 3; //16-bit int S*
512: result := 4; //16-bit int U
8: result := 5; //32-bit int S*
768: result := 6; //32-bit int U
1024: result := 7; //64-bit int S
1280: result := 8; //64-bit int U
16: result := 9; //32-bit real*
64: result := 10; //64-bit real*
1536: result := 11; //128-bit real
128: result := 12; //24-bit rgb
32: result := 13; //64-bit complex
1792: result := 14; //128-bit complex
2048: result := 15; //256-bit complex
else
result := 0;
end; //case
end; //func DataType2DropItem
function DataType2BitsPerVoxel (lDataType: smallint): integer;
begin
case lDataType of
1: result := 1; //binary
256: result := 8; //8-bit S
2: result := 8; //8-bit int U*
4: result := 16; //16-bit int S*
512: result := 16; //16-bit int U
8: result := 32; //32-bit int S*
768: result := 32; //32-bit int U
1024: result := 64; //64-bit int S
1280: result := 64; //64-bit int U
16: result := 32; //32-bit real*
64: result := 64; //64-bit real*
1536: result := 128; //128-bit real
128: result := 24; //24-bit rgb
32: result := 64; //64-bit complex
1792: result := 128; //128-bit complex
2048: result := 256; //256-bit complex
else
result := 0;
end; //case
end; //func DataType2BitsPerVoxel
function time_units2DropItem (lxyzt_units: byte): integer;
var lxyzt_unitsClipped: byte;
begin
lxyzt_unitsClipped := lxyzt_units and 56;
case lxyzt_unitsClipped of
kNIFTI_UNITS_SEC : result := 1;//= 8;
kNIFTI_UNITS_MSEC : result := 2;//= 16;
kNIFTI_UNITS_USEC : result := 3;//= 24;
kNIFTI_UNITS_HZ : result := 4;//= 32;
kNIFTI_UNITS_PPM : result := 5;//= 40;
else result := 0; //unknown
end; //case
end; //func time_units2DropItem
function DropItem2time_units (lDropItemIndex: byte): integer; //convert ComboBox index to NIFTI time units
begin
case lDropItemIndex of
1: result := kNIFTI_UNITS_SEC;
2: result := kNIFTI_UNITS_MSEC;
3: result := kNIFTI_UNITS_USEC;
4: result := kNIFTI_UNITS_HZ;
5: result := kNIFTI_UNITS_PPM;
else result := 0; //unknown
end; //case
end; //func DropItem2time_units
procedure THdrForm.WriteHdrForm (var lHdr: TMRIcroHdr); //writes a header to the various controls
var //lCStr: string[80];
lInc: Integer;
begin
with lHdr.NIFTIhdr do begin
//numDimEdit.value := dim[0];
XDim.Value := dim[1];
YDim.Value := dim[2];
ZDim.Value := dim[3];
TDim.Value := dim[4];
Dim5Edit.value := dim[5];
Dim6Edit.value := dim[6];
Dim7Edit.value := dim[7];
Xmm.Value := pixdim[1];
Ymm.Value := pixdim[2];
Zmm.Value := pixdim[3];
TSec.Value := pixdim[4];
PixDim5.value := pixdim[5];
PixDim6.value := pixdim[6];
PixDim7.value := pixdim[7];
OffsetEdit.value := round(vox_offset);
Scale.value := scl_slope;
Intercept.value := scl_inter;
{$IFNDEF FPC}
fTypeDrop.SetItemIndex( DataType2DropItem( datatype));
if lHdr.NativeEndian then
Endian.SetItemIndex(0)
else
Endian.SetItemIndex(1);
//caption := inttohex(Magic);
if Magic = kNIFTI2_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.SetItemIndex(4)
else if Magic = kNIFTI2_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.SetItemIndex(3)
else if Magic = kswapNIFTI2_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.SetItemIndex(4)
else if Magic = kswapNIFTI2_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.SetItemIndex(3)
else
if Magic = kNIFTI_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.SetItemIndex(2)
else if Magic = kNIFTI_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.SetItemIndex(1)
else if Magic = kswapNIFTI_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.SetItemIndex(2)
else if Magic = kswapNIFTI_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.SetItemIndex(1)
else
HeaderMagicDrop.SetItemIndex(0);
xyzt_sizeDrop.SetItemIndex(xyzt_units and 3);
xyzt_timeDrop.SetItemIndex(time_units2DropItem(xyzt_units));
{$ELSE}
fTypeDrop.ItemIndex := ( DataType2DropItem( datatype));
if lHdr.DiskDataNativeEndian then
Endian.ItemIndex:=(0)
else
Endian.ItemIndex:=(1);
if Magic = kNIFTI2_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.ItemIndex:=(4)
else if Magic = kNIFTI2_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.ItemIndex:=(3)
else if Magic = kswapNIFTI2_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.ItemIndex:=(4)
else if Magic = kswapNIFTI2_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.ItemIndex:=(3)
else if Magic = kNIFTI_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.ItemIndex:=(2)
else if Magic = kNIFTI_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.ItemIndex:=(1)
else if Magic = kswapNIFTI_MAGIC_EMBEDDED_HDR then
HeaderMagicDrop.ItemIndex:=(2)
else if Magic = kswapNIFTI_MAGIC_SEPARATE_HDR then
HeaderMagicDrop.ItemIndex:=(1)
else
HeaderMagicDrop.ItemIndex:=(0);
xyzt_sizeDrop.ItemIndex:=(xyzt_units and 3);
xyzt_timeDrop.ItemIndex:=(time_units2DropItem(xyzt_units));
{$ENDIF}
CommentEdit.text := descrip;
data_typeEdit.text := data_type;
db_.text := db_name;
aux.text := aux_file;
intent_nameEdit.text := intent_name;
ext.value := extents;
lInc := intent_code;
if (intent_code > 1) and (intent_code <= kNIFTI_LAST_STATCODE) then
lInc := lInc - 1 //intent_codes start from 2 not 1
else if intent_code >= kNIFTI_FIRST_NONSTATCODE then //remove gap in numbers that follow final statcode
lInc := (intent_code - kNIFTI_FIRST_NONSTATCODE)+kNIFTI_LAST_STATCODE
else begin
lInc := 0; //unknown
end;
{$IFNDEF FPC}
IntentCodeDrop .SetItemIndex(lInc);
SliceCodeDrop.SetItemIndex(slice_code);
FreqDimDrop.SetItemIndex(dim_info and 3);
PhaseDimDrop.SetItemIndex((dim_info shr 2) and 3);
SliceDimDrop.SetItemIndex((dim_info shr 4) and 3);
{$ELSE}
IntentCodeDrop.ItemIndex:=lInc;
SliceCodeDrop.ItemIndex:=(slice_code);
FreqDimDrop.ItemIndex:=(dim_info and 3);
PhaseDimDrop.ItemIndex:=((dim_info shr 2) and 3);
SliceDimDrop.ItemIndex:=((dim_info shr 4) and 3);
{$ENDIF}
intent_p1Edit.value := intent_p1;
intent_p2Edit.value := intent_p2;
intent_p3Edit.value := intent_p3;
ses.value := session_error;
reg.value := ord(regular);
slice_startEdit.value := slice_start;
slice_endEdit.value := slice_end;
cmax.value := cal_max;
cmin.value := cal_min;
slice_durationEdit.value := slice_duration;
toffsetEdit.value := toffset;
gmax.value := glmax;
gmin.value := glmin;
//Next: 3D orientation rotations
QFacEdit.value := pixdim[0];
{$IFNDEF FPC}
QFormDrop.SetItemIndex(qform_code);
SFormDrop.SetItemIndex(sform_code);
{$ELSE}
QFormDrop.ItemIndex:= (qform_code);
SFormDrop.ItemIndex :=(sform_code);
{$ENDIF}
quatern_bEdit.value := quatern_b;
quatern_cEdit.value := quatern_c;
quatern_dEdit.value := quatern_d;
qoffset_xEdit.value := qoffset_x;
qoffset_yEdit.value := qoffset_y;
qoffset_zEdit.value := qoffset_z;
srow_x0Edit.value := srow_x[0];//12 affine matrix values
srow_x1Edit.value := srow_x[1];
srow_x2Edit.value := srow_x[2];
srow_x3Edit.value := srow_x[3];
srow_y0Edit.value := srow_y[0];
srow_y1Edit.value := srow_y[1];
srow_y2Edit.value := srow_y[2];
srow_y3Edit.value := srow_y[3];
srow_z0Edit.value := srow_z[0];
srow_z1Edit.value := srow_z[1];
srow_z2Edit.value := srow_z[2];
srow_z3Edit.value := srow_z[3];
//Finally... check values
HeaderMagicDropSelect(nil); //disable or enable offset based on image format
end; //with lHdr
end;
procedure ApplySaveDlgFilter (lSaveDlg: TSaveDialog);
var
lLen,lPos,lPipes,lPipesReq: integer;
lExt: string;
begin
lPipesReq := (lSaveDlg.FilterIndex * 2)-1;
if lPipesReq < 1 then exit;
lLen := length(lSaveDlg.Filter);
lPos := 1;
lPipes := 0;
while (lPos < lLen) and (lPipes < lPipesReq) do begin
if lSaveDlg.Filter[lPos] = '|' then
inc(lPipes);
inc(lPos);
end;
if (lPos >= lLen) or (lPipes < lPipesReq) then
exit;
lExt := '';
while (lPos <= lLen) and (lSaveDlg.Filter[lPos] <> '|') do begin
if lSaveDlg.Filter[lPos] <> '*' then
lExt := lExt + lSaveDlg.Filter[lPos];
inc(lPos);
end;
if lExt <> '' then
lSaveDlg.Filename := ChangeFileExt(lSaveDlg.Filename,lExt);
end;
procedure THdrForm.SaveHdrDlgClose(Sender: TObject);
begin
ApplySaveDlgFilter(SaveHdrDlg);
end;
procedure THdrForm.ReadHdrDimensionsOnly (var lHdr: TMRIcroHdr); //reads only size dimensions: useful for computing estimated filesize
var
lInc: Integer;
begin
with lHdr.NIFTIhdr do begin
dim[1] := round(XDim.Value);
dim[2] := round(YDim.Value);
dim[3] := round(ZDim.Value);
dim[4] := round(TDim.Value);
dim[5] := round(Dim5Edit.value);
dim[6] := round(Dim6Edit.value);
dim[7] := round(Dim7Edit.value);
//Next: compute Dim[0]: compute number of dimensions by finding largest dimension with at least two samples
lInc := 7;
while dim[lInc] < 2 do
dec(lInc);
Dim[0] := lInc; //comp
//showmessage(inttostr(Dim[0]));
vox_offset := OffsetEdit.value;
DataType := DropItem2DataType(FTypeDrop.ItemIndex);
bitpix := DataType2BitsPerVoxel(DataType);
if Endian.ItemIndex = 0 then
lHdr.DiskDataNativeEndian := true
else
lHdr.DiskDataNativeEndian := false;
end; //with NIfTIhdr
end; //proc ReadHdrDimensionsOnly
procedure THdrForm.ReadHdrForm (var lHdr: TMRIcroHdr); //read the values the user has entered
var
lInc: Integer;
begin
NIFTIhdr_ClearHdr(lHdr); //important: reset values like first 4 bytes = 348
ReadHdrDimensionsOnly(lHdr);
//StatusBar1.Panels[0].text := 'ImageData (bytes)= '+inttostr(ComputeImageDataBytes(lHdr));
with lHdr.NIFTIhdr do begin
pixdim[1] := Xmm.Value;
pixdim[2] := Ymm.Value;
pixdim[3] := Zmm.Value;
pixdim[4] := TSec.Value;
pixdim[5] := PixDim5.Value;
pixdim[6] := PixDim6.Value;
pixdim[7] := PixDim7.Value;
scl_slope := Scale.value;
scl_inter := Intercept.value;
if HeaderMagicDrop.ItemIndex = 2 then
Magic := kNIFTI_MAGIC_EMBEDDED_HDR
else if HeaderMagicDrop.ItemIndex = 1 then
Magic := kNIFTI_MAGIC_SEPARATE_HDR
else
Magic := 0; //not saed as NIFTI
for lInc := 1 to 80 do
descrip[lInc] := chr(0);
for lInc := 1 to length(CommentEdit.text) do
descrip[lInc] := CommentEdit.text[lInc];
for lInc := 1 to 10 do
data_type[lInc] := chr(0);
for lInc := 1 to length(data_typeEdit.text) do
data_type[lInc] := data_typeEdit.text[lInc];
for lInc := 1 to 18 do
db_name[lInc] := chr(0);
for lInc := 1 to length(db_.text) do
db_name[lInc] := db_.text[lInc];
for lInc := 1 to 24 do
aux_file[lInc] := chr(0);
for lInc := 1 to length(aux.text) do
aux_file[lInc] := aux.text[lInc];
for lInc := 1 to 16 do
intent_name[lInc] := chr(0);
for lInc := 1 to length(intent_nameEdit.text) do
intent_name[lInc] := intent_nameEdit.text[lInc];
xyzt_units := xyzt_sizeDrop.ItemIndex;
xyzt_units := xyzt_units+ (DropItem2time_units(xyzt_timeDrop.ItemIndex));
lInc := IntentCodeDrop.ItemIndex;
if (lInc > 0) and (lInc < kNIFTI_LAST_STATCODE) then
lInc := lInc + 1 //intent_codes start from 2 not 1
else if (lInc >= kNIFTI_LAST_STATCODE) then //add gap in numbers between last stat code and misc codes
lInc := (lInc - kNIFTI_LAST_STATCODE)+kNIFTI_FIRST_NONSTATCODE
else
lInc := 0; //unknown
intent_code := lInc;
intent_p1 := intent_p1Edit.value;
intent_p2 := intent_p2Edit.value;
intent_p3 := intent_p3Edit.value;
extents:= round(ext.value);
session_error := round(ses.value);
regular := chr(round(reg.value));
dim_Info := FreqDimDrop.ItemIndex+(PhaseDimDrop.ItemIndex shl 2)+(SliceDimDrop.ItemIndex shl 4);
slice_start := round(slice_startEdit.value);
slice_end := round(slice_endEdit.value);
slice_code := SliceCodeDrop.ItemIndex;
Slice_duration := (Slice_DurationEdit.value);
toffset := (toffsetEdit.value);
cal_max := cmax.value;
cal_min := cmin.value;
glmax := round(gmax.value);
glmin := round(gmin.value);
//Next: 3D orientation rotations
pixdim[0] := QFacEdit.value;
qform_code := QFormDrop.ItemIndex;
quatern_b := quatern_bEdit.value;
quatern_c := quatern_cEdit.value;
quatern_d := quatern_dEdit.value;
qoffset_x := qoffset_xEdit.value;
qoffset_y := qoffset_yEdit.value;
qoffset_z := qoffset_zEdit.value;
sform_code := SFormDrop.ItemIndex;
srow_x[0] := srow_x0Edit.value;//12 affine matrix values
srow_x[1] := srow_x1Edit.value;
srow_x[2] := srow_x2Edit.value;
srow_x[3] := srow_x3Edit.value;
srow_y[0] := srow_y0Edit.value;
srow_y[1] := srow_y1Edit.value;
srow_y[2] := srow_y2Edit.value;
srow_y[3] := srow_y3Edit.value;
srow_z[0] := srow_z0Edit.value;
srow_z[1] := srow_z1Edit.value;
srow_z[2] := srow_z2Edit.value;
srow_z[3] := srow_z3Edit.value;
end; //with lHdr
//zero_intercept := intercept.value;
end;
procedure THdrForm.About1Click(Sender: TObject);
begin
Showmessage('Chris Rorden''s NIfTI header viewer release 1/1/2006.');
end;
function THdrForm.OpenAndDisplayHdr (var lFilename: string; var lHdr: TMRIcroHdr): boolean;
var lFileDir: string;
begin
FreeImgMemory(lHdr);
result := false;
NIFTIhdr_ClearHdr(lHdr);
if not NIFTIhdr_LoadHdr(lFilename, lHdr) then exit;
WriteHdrForm (lHdr);
lFileDir := extractfiledir(lFilename);
if lFileDir <> gTemplateDir then
OpenHdrDlg.InitialDir := lFileDir;
SaveHdrDlg.InitialDir := lFileDir;
//999 ImgForm.SaveDialog1.InitialDir := lFileDir;
SaveHdrDlg.FileName := lFilename; //make this default file to write
StatusBar1.Panels[1].text := lFilename;
StatusBar1.Panels[0].text := 'Img= '+inttostr(ComputeImageDataBytes(lHdr));
result := true;
end;
procedure THdrForm.Open1Click(Sender: TObject);
var lHdr: TMRIcroHdr;
lFilename: string;
begin
//NIfTI (*.hdr;*.nii)|*.hdr; *.nii; *.nii.gz|NIfTI separate header (*.hdr)|*.hdr|NIfTI embedded header|*.nii|NIfTI compressed|*.nii.gz
//if not OpenHdrDlg.Execute then exit;
if not OpenDialogExecute(kImgFilter,'Select header',false) then exit;
lFilename := OpenHdrDlg.Filename;
OpenAndDisplayHdr(lFilename,lHdr);
end;
procedure THdrForm.Save1Click(Sender: TObject);
var lHdr: TMRIcroHdr;
lFilename: string;
begin
NIFTIhdr_ClearHdr(lHdr);
if not SaveHdrDlg.Execute then exit;
lFilename := SaveHdrDlg.Filename;
OpenHdrDlg.InitialDir := extractfiledir(lFilename);
//999 ImgForm.SaveDialog1.InitialDir := extractfiledir(lFilename);
ReadHdrForm (lHdr);
if not NIFTIhdr_SaveHdr (lFilename, lHdr,true) then exit;
OpenHdrDlg.FileName := lFilename; //make this default file to open
StatusBar1.Panels[1].text := 'wrote: '+lFilename;
end;
procedure THdrForm.TabMenuClick(Sender: TObject);
begin
PageControl1.ActivePage := PageControl1.Pages[(Sender as TMenuItem).Tag];
end;
procedure THdrForm.Exit1Click(Sender: TObject); //Quit the program or form
begin
Close;
end;
{$IFNDEF FPC}
procedure THdrForm.WMDropFiles(var Msg: TWMDropFiles); //implement drag and drop
//NOTE: requires 'ShellAPI' in uses clause
var lHdr: TMRIcroHdr;
CFileName: array[0..MAX_PATH] of Char;
lFilename: string;
begin
try
if DragQueryFile(Msg.Drop, 0, CFileName, MAX_PATH) > 0 then
begin
lFilename := CFilename;
OpenAndDisplayHdr(lFileName, lHdr);
Msg.Result := 0;
end;
finally
DragFinish(Msg.Drop);
end;
end;
{$ENDIF}
procedure THdrForm.FormCreate(Sender: TObject);
var lHdr: TMRIcroHdr;
begin
//DecimalSeparator := '.'; //important for reading DICOM data: e.g. Germans write '12,00' but DICOM is '12.00'
{$IFNDEF Unix} DragAcceptFiles(Handle, True); //engage drag and drop
{$ENDIF}
NIFTIhdr_ClearHdr(lHdr);
HdrForm.WriteHdrForm (lHdr); //show default header
end;
procedure THdrForm.ImageSzChange(Sender: TObject); //report size of image data
var
lHdr: TMRIcroHdr;
begin
NIFTIhdr_ClearHdr(lHdr); //important: reset values like first 4 bytes = 348
ReadHdrDimensionsOnly(lHdr);
StatusBar1.Panels[0].text := 'Img= '+inttostr(ComputeImageDataBytes(lHdr));
end;
procedure THdrForm.HeaderMagicDropSelect(Sender: TObject);
var lHdrIndex: integer;
begin
lHdrIndex := HeaderMagicDrop.ItemIndex; //0=unkown, 1=nifti hdr+img, 2=nifti .nii embedded
if lHdrIndex = 1 then begin//nifti hdr+img, offset must be = 0
OffsetEdit.MinValue := 0;
OffsetEdit.Enabled := false;
OffsetEdit.value := 0;
end else if lHdrIndex = 2 then begin//embedded header, offset must be at least 348
OffsetEdit.Enabled := true;
if OffsetEdit.value < sizeof(TNIFTIHdr) then
OffsetEdit.value := sizeof(TNIFTIHdr);
OffsetEdit.MinValue := sizeof(TNIFTIHdr);
end else begin //no embedded header... therefore offset can be zero
OffsetEdit.MinValue := 0;
OffsetEdit.Enabled := true;
if OffsetEdit.value = sizeof(TNIFTIHdr) then
OffsetEdit.value := 0;
end;
end;
{$IFDEF FPC}
initialization
{$I nifti_hdr_view.lrs}
{$ENDIF}
end.
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