/usr/share/gnudatalanguage/coyote/getimage.pro is in gdl-coyote 2016.11.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; NAME:
; GETIMAGE
;
; PURPOSE:
;
; The purpose of this function is to allow the user to open either
; unformmated or XDR binary image files of up to eight dimensions.
;
; CATEGORY:
;
; Widgets, File I/O.
;
; CALLING SEQUENCE:
;
; image = GETIMAGE(filename)
;
; OPTIONAL INPUTS:
;
; filename: The name of the file to open for reading.
;
; OPTIONAL KEYWORD PARAMETERS:
;
; CANCEL: An output variable that can be set to a named variable.
; The value of the return variable will be 1 if the user clicked
; the "Cancel" button or if there was a problem reading the file.
;
; DATATYPE: The "type" of data you wish to read out of the file.
; The data type corresponds to the Size(image, /TYPE) value. Here
; are the types supported:
;
; BYTE 1 (default)
; INTEGER 2
; LONG INTEGER 3
; FLOAT 4
; DOUBLE 5
; UNSIGNED INTEGER 12
; UNSIGNED LONG INTEGER 13
; 64-bit LONG 14
; 64-bit UNSIGNED LONG 15
;
;
;
; DIMENSIONS: A vector of image dimensions. The default value is [256, 256].
;
; DIRECTORY: The name of the directory the file is located in. By
; default the program looks in the "coyote" directory under the
; main IDL directory, if one exists. Otherwise, it defaults to the
; current directory.
;
; ENDIAN: Set this keyword to an integer that indicates the byte
; ordering of the data file. If you don't know what byte order means,
; or you don't know anything about the byte order of the data, or
; if you are sure the data was created on the same type of machine
; you are now running IDL on, then just accept the default of 0 or
; "native" ordering. If you are wrong, you will soon know it and you
; can set the keyword to another value on your next try. :-)
;
; If you know the machine was created on a big endian machine (such
; as a Sun or HP workstation), set this value to 1 (Big Endian). If e
; you are sur the image data was create on a little endian machine (such
; as a Windows PC or laptop running LINUX), set the value to 2 (Little Endian).
;
; HEADER: The size of any header information in the file in BYTES.
; Default is 0.
;
; HEADDATA: An optional output keyword that will contain the header
; information read from the file.
;
; PARENT: The group leader for this widget program. The PARENT is
; required if GETIMAGE is called from another widget program in order
; to make this program a MODAL widget program.
;
; XDR: Set this keyword if the binary file is of XDR type. The default
; type is "Unformatted".
;
; XOFFSET: This is the X offset of the program on the display. The
; program will be placed approximately in the middle of the display
; by default.
;
; YOFFSET: This is the Y offset of the program on the display. The
; program will be placed approximately in the middle of the display
; by default.
;
; COMMON BLOCKS:
;
; None.
;
; SIDE EFFECTS:
;
; A "CANCEL" operation is indicated by a 0 return value.
; Any error in reading the file results in a 0 return value.
;
; EXAMPLE:
; To load the image "galaxy.dat" in the $IDL/examples/data
; directory, type:
;
; image = GETIMAGE('galaxy.dat', DIRECTORY=!DIR + '/examples/data', $
; DIMENSIONS=[256,256], Cancel=cancelled, Parent=event.top)
; IF NOT cancelled THEN TV, image
;
; MODIFICATION HISTORY:
; Written by: David Fanning, 3 February 96.
; Fixed bug that prevented reading INTEGER data. 19 Dec 96.
; Modifed program for IDL 5 MODAL operation. 19 Oct 97.
; Added CANCEL keyword. 27 Oct 97. DWF.
; Fixed CANCLE keyword spelling. Sigh... 29 JUN 98. DWF.
; Added COYOTE_FIELD, improved appearance. 19 NOV 99. DWF.
; Updated with latest version of COYOTE_FIELD. 18 FEB 2000. DWF.
; Added CATCH keyword so the program will break when I want
; it to. :-) 18 MAR 2000. DWF.
; Added GROUP_LEADER keyword, which is synonymous with PARENT. 31 MAR 2000. DWF.
; Updated obsolete PICKFILE call to DIALOG_PICKFILE. 17 JAN 2001. DWF.
; Extensive update for IDL Programming Techniques, 3rd Edition. 1 November 2006. DWF.
; XSIZE, YSIZE, CATCH, and FRAMES keyword made obsolete.
; HEADDATA, ENDIAN, DATATYPE, DIMENSIONS keywords added.
; Added ability to parse fully qualified file names passed from Dialog_Pickfile. 30 Oct 2010. DWF.
; IF a file name is not passed into the program, it asks the user to select one now. 10 Jan 2011. DWF.
; Problem with SWAP_ENDIAN keywords fixed. 7 March 2011. DWF.
;-
;
;******************************************************************************************;
; Copyright (c) 2008, by Fanning Software Consulting, Inc. ;
; All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
PRO GETIMAGE_NULL_EVENTS, event
; The purpose of this event handler is to do nothing
; and ignore all events that come to it.
END ;-------------------------------------------------------------------------
PRO GETIMAGE_DIMS_EVENTS, event
; The purpose of this event handler is to make the proper dimension widgets
; sensitive or insensitive.
Widget_Control, event.top, Get_UValue=info
num = event.index + 1
FOR j=0,num-1 DO Widget_Control, info.d[j], Sensitive=1
FOR j=num, 7 DO Widget_Control, info.d[j], Sensitive=0, Set_Value=0
END ;-------------------------------------------------------------------------
PRO GETIMAGE_XDR_EVENTS, event
; The purpose of this event handler is to make the byte order widget
; sensitive or insensitive depending on file format.
Widget_Control, event.top, Get_UValue=info
IF event.index THEN Widget_Control, info.byteorderID, Sensitive=0 ELSE $
Widget_Control, info.byteorderID, Sensitive=1
END ;-------------------------------------------------------------------------
FUNCTION GETIMAGE_FIND_COYOTE
; The purpose of this function is to find the "coyote"
; training directory and return its path. If no
; directory is found, the function returns a null string.
ON_ERROR, 1
; Check this directory first.
CD, Current=thisDir
IF STRPOS(STRUPCASE(thisDir), 'COYOTE') GT 0 THEN RETURN, thisDir
; Look in !Path directories.
pathDir = EXPAND_PATH(!Path, /Array)
s = SIZE(pathDir)
IF s[1] LT 1 THEN RETURN, ''
FOR j=0,s[1]-1 DO BEGIN
check = STRPOS(STRUPCASE(pathDir[j]), 'COYOTE')
IF check GT 0 THEN RETURN, pathDir[j]
ENDFOR
RETURN, ''
END ;-------------------------------------------------------------------------
PRO GETIMAGE_EVENT, event
; The only events that can come here are button events.
; Get the info structure out of the user value of the top-level base.
Widget_Control, event.top, Get_UValue=info
; There may be errors we can't anticipate. Catch them here, alert the
; user as to what the error was, and exit the event handler without
; doing any damage.
Catch, theError
IF theError NE 0 THEN BEGIN
ok = cgErrorMsg()
formdata = {cancel:1}
*info.ptrToFormData =formdata
RETURN
ENDIF
; Which button caused this event?
Widget_Control, event.id, Get_Value=buttonValue
CASE buttonValue OF
'Pick Filename': BEGIN
; Start in the directory listed in the directory text widget.
; Convert the text value to a scalar.
Widget_Control, info.dirnameID, Get_Value=startDirectory
startDirectory = startDirectory[0]
; If this directory doesn't exist, use the current directory.
test = File_Search(startDirectory, Count=foundfile)
IF foundfile NE 1 THEN CD, Current=startDirectory
; Use PICKFILE to pick a name.
pick = Dialog_Pickfile(Path=startDirectory, /NoConfirm, $
Get_Path=path, Filter='*.*')
; Set the directory text widget with the name of the directory.
; Make sure the user didn't cancel out of PICKFILE.
IF pick NE '' THEN BEGIN
; Find the lengths of the PICK and the PATH.
pathLen = StrLen(path)
picklen = StrLen(pick)
; Shorten the PATH to take off last file separator.
path = StrMid(path, 0, pathLen-1)
; Put the PATH in the directory location.
Widget_Control, info.dirnameID, Set_Value=path
; Set the filename text widget with the name of the file.
filename = StrMid(pick, pathlen, picklen-pathlen)
Widget_Control, info.filenameID, Set_Value=filename
ENDIF
END ; of the Pick Filename button case
'Cancel': BEGIN
; Have to exit here gracefully. Set the "CANCEL" flag.
formdata = {cancel:1}
*info.ptrToFormData =formdata
; Out of here!
Widget_Control, event.top, /Destroy
END ; of the Cancel button case
'Accept': BEGIN ; Gather the form information.
; Put the directory and filename together to make a path.
Widget_Control, info.dirnameID, Get_Value=directory
Widget_Control, info.filenameID, Get_Value=file
filename = Filepath(Root_Dir=directory[0],file[0])
; Get the size and header info. Remember these are Pointers to Integers!
Widget_Control, info.headerID, Get_Value=header
header = Long(header[0])
; Get the number of dimensions.
num = Widget_Info(info.dimsID, /Droplist_Select) + 1
; Get a vector of dimensions. If any of these numbers is 0, you
; have a problem.
dimensions = IntArr(num)
FOR j=0,num-1 DO BEGIN
Widget_Control, info.d[j], Get_Value=theDimension
IF theDimension EQ 0 THEN Message, 'Dimension ' + StrTrim(j+1,2) + ' cannot be zero.'
dimensions[j] = theDimension
ENDFOR
; Get the data type from the droplist widget.
listIndex = Widget_Info(info.datatypesID, /Droplist_Select)
type = info.datatypes(listIndex)
; What kind of endness do we have?
endian = Widget_Info(info.byteorderID, /Droplist_Select)
; Get the format index from the formatlist widget.
xdr = Widget_Info(info.formatlistID, /Droplist_Select)
; If we want XDR, then the endian order is always "native".
IF xdr THEN endian = 0
; Create the formdata structure from the information you collected.
formdata = {header:header, dimensions:dimensions, endian:endian, $
filename:filename, type:type, xdr:xdr, cancel:0}
; Store the formdata in the pointer location.
*info.ptrToFormData = formdata
; Out of here!
Widget_Control, event.top, /Destroy
END ; of the Accept button case
ENDCASE
END ; of GETIMAGE_EVENT event handler ***************************************
FUNCTION GETIMAGE, filename, Directory=directory, DataType=datatype, Dimensions=dimensions, $
Header=header, HeadData=headdata, Parent=parent, XDR=xdr, XOffSet=xoffset, $
YOffSet=yoffset, Cancel=canceled, Group_Leader=group_leader, Endian=endian, $
XSIZE=xsize, YSIZE=ysize, FRAMES=frames, Catch=catchit ; Obsolete keywords on this line
; This is a function to specify the size, data type, and header information
; about an image that you would like to read. It reads the data and returns
; it as the result of the function. If an error occurs or the user CANCELS,
; the function returns a 0.
On_Error, 2
; Catch errors unless explicitly told not to.
IF N_Elements(catchit) EQ 0 THEN catchit = 1 ; Now obsolete. Doing nothing with value.
; Respond to either PARENT or GROUP_LEADER keywords.
IF N_Elements(parent) NE 0 THEN group_leader = parent
; Check for parameters and keywords.
IF N_Elements(filename) EQ 0 THEN BEGIN
filename=Dialog_Pickfile()
IF filename EQ "" THEN RETURN, ""
ENDIF
; Does the file name have a directory? Is so, use it.
fileDir = File_Dirname(filename)
IF StrLen(fileDir) GT 1 THEN BEGIN
filename = File_Basename(filename)
directory = fileDir
ENDIF ELSE BEGIN
IF fileDir EQ "." THEN BEGIN
CD, CURRENT=directory
filename = File_Basename(filename)
ENDIF
ENDELSE
; If DIRECTORY keyword is not used, use the IDL example/data directory.
IF N_Elements(directory) EQ 0 THEN BEGIN
directory = File_DirName(Filepath(Subdirectory=['examples', 'data'], 'nonesense.dat'))
ENDIF
startDirectory = directory
; Check for size and header keywords. These probably come in as
; numbers and you need strings to put them into text widgets.
IF N_Elements(endian) EQ 0 THEN endian = 0 ELSE endian = 0 > endian < 2
IF N_Elements(datatype) EQ 0 THEN datatype = 1
IF N_Elements(dimensions) EQ 0 THEN dimensions = [256, 256]
IF N_Elements(header) EQ 0 THEN header='0' ELSE header=StrTrim(header,2)
; Create a modal top-level base if group leader is present.
IF N_Elements(group_leader) EQ 0 THEN $
tlb = Widget_Base(Column=1, Title='Read Image Data', /Base_Align_Center) ELSE $
tlb = Widget_Base(Column=1, Title='Read Image Data', Modal=1, $
Group_Leader=group_leader, /Base_Align_Center)
frameBase = Widget_Base(tlb, Frame=1, Column=1)
; Create the directory widgets.
dirnamebase = Widget_Base(frameBase, Row=1)
dirnamelabel = Widget_Label(dirnamebase, Value='Directory:')
dirnameID = Widget_Text(dirnamebase, Value=startDirectory, /Editable, $
Event_Pro='GETIMAGE_NULL_EVENTS', XSize=Fix(2.0*StrLen(startDirectory) > 50))
; Create the filename widgets.
filenamebase = Widget_Base(frameBase, Row=1)
filenamelabel = Widget_Label(filenamebase, Value='Filename:')
filenameID = Widget_Text(filenamebase, Value=filename, /Editable, $
Event_Pro='GETIMAGE_NULL_EVENTS', XSize=2*StrLen(filename) > 20)
; Create a button to allow user to pick a filename.
pickbutton = Widget_Button(filenamebase, Value='Pick Filename')
; Create a droplist widget to select file data types.
database = Widget_Base(frameBase, Row=1)
datatypes = ['Byte', 'Integer (16-bit)', 'Long Integer (32-bit)', 'Float', 'Double', 'Unsigned Integer', 'Unsigned Long', '64-bit Long', '64-bit Unsigned Long']
types = [1, 2, 3, 4, 5, 12, 13, 14, 15]
theIndex = Where(types EQ datatype, count)
datatypesID = Widget_Droplist(database, Value=datatypes, UValue=types, $
Title='Data Type: ', Event_Pro='GETIMAGE_NULL_EVENTS')
IF count EQ 0 THEN theIndex = 0
Widget_Control, datatypesID, Set_Droplist_Select=theIndex
; Create a droplist widget to select file formats.
formatlistID = Widget_Droplist(database, Value=['Unformatted', 'XDR format'], $
Title='File Format: ', Event_Pro='GETIMAGE_XDR_EVENTS')
row4 = Widget_Base(frameBase, Row=1)
dimsID = Widget_Droplist(row4, Title='Image Dimensions: ', Value=StrTrim(Indgen(7)+1, 2), $
Event_PRO = 'GETIMAGE_DIMS_EVENTS')
Widget_Control, dimsID, Set_Droplist_Select=1
byteorderID = Widget_Droplist(row4, Title='Image Byte Order: ', $
Value=['Native', 'Big Endian', 'Little Endian'], Event_PRO = 'GETIMAGE_NULL_EVENTS')
Widget_Control, byteorderID, Set_Droplist_Select=endian
label = Widget_Label(row4, Value=' Header Size: ')
combovalues = ['0','32','64','128', '256', '512','1024']
IF header GT 0 THEN combovalues = [StrTrim(header,2), combovalues]
headerID = Widget_Combobox(row4, Value=combovalues, $
/Editable, Event_PRO = 'GETIMAGE_NULL_EVENTS')
; Create widgets to gather the required file sizes.
sizebase = Widget_Base(frameBase, Row=2)
d = IntArr(8)
d[0] = FSC_Field(sizebase, Title='1st Dim:', Value=0, /Integer, XSize=6, /Positive)
d[1] = FSC_Field(sizebase, Title='2nd Dim:', Value=0, /Integer, XSize=6, /Positive)
d[2] = FSC_Field(sizebase, Title='3rd Dim:', Value=0, /Integer, XSize=6, /Positive)
d[3] = FSC_Field(sizebase, Title='4th Dim:', Value=0, /Integer, XSize=6, /Positive)
d[4] = FSC_Field(sizebase, Title='5th Dim:', Value=0, /Integer, XSize=6, /Positive)
d[5] = FSC_Field(sizebase, Title='6th Dim:', Value=0, /Integer, XSize=6, /Positive)
d[6] = FSC_Field(sizebase, Title='7th Dim:', Value=0, /Integer, XSize=6, /Positive)
d[7] = FSC_Field(sizebase, Title='8th Dim:', Value=0, /Integer, XSize=6, /Positive)
num = 1 > Size(dimensions, /N_Elements) < 8
FOR j=0,num-1 DO Widget_Control, d[j], Set_Value=dimensions[j]
FOR j=num, 7 DO Widget_Control, d[j], Sensitive=0
; Create cancel and accept buttons.
cancelbase = Widget_Base(tlb, Row=1)
cancel = Widget_Button(cancelbase, Value='Cancel')
accept = Widget_Button(cancelbase, Value='Accept')
; Recalculate the length of the filenameID widget.
g1 = Widget_Info(dirnamebase, /Geometry)
g2 = Widget_Info(filenamelabel, /Geometry)
g3 = Widget_Info(pickbutton, /Geometry)
target = g1.scr_xsize - (g2.scr_xsize + g3.scr_xsize) - 10
Widget_Control, filenameID, Scr_XSize=target
; Center the program on the display.
cgCenterTLB, tlb
; Realize the program.
Widget_Control, tlb, /Realize
; Create a pointer to store the information collected from the form.
; The initial data stored here is set to CANCEL, so nothing needs to
; be done if the user kills the widget with the mouse.
ptrToFormData = Ptr_New({cancel:1})
; Set the correct file format in the format droplist widget.
Widget_Control, formatlistID, Set_Droplist_Select=Keyword_Set(xdr)
; Set the text insertion point at the end of the filename text widget.
tip = [StrLen(filename),0]
Widget_Control, filenameID, Input_Focus=1
Widget_Control, filenameID, Set_Text_Select=tip
; Create an info structure with program information.
info = { filenameID:filenameID, $ ; The name of the file.
d:d, $ ; The dimension widgets IDs.
dimsID:dimsID, $ ; The number of dimensions widget ID.
byteorderID:byteorderID, $ ; The byte order widget ID.
dirnameID:dirnameID, $ ; The ID of the widget with the directory name.
headerID:headerID, $ ; The ID of the widget with the image HEADER size.
datatypesID:datatypesID, $ ; The ID of the image data TYPE droplist ID.
formatlistID:formatlistID, $ ; The ID of the image FORMAT droplist ID.
datatypes:types, $ ; The possible data types.
ptrToFormData:ptrToFormData} ; A pointer to store the form information.
; Store the info structure in the user value of the top-level base.
Widget_Control, tlb, Set_UValue=info
; The form will be a MODAL or BLOCKING widget, depending upon the
; presence of the PARENT. We block or are MODAL here until the widget
; is destroyed.
XManager, 'getimage', tlb, Event_Handler='GETIMAGE_EVENT'
; When the widget is destroyed, the block is released, and we
; return here. Get the form data that was collected by the form
; and stored in the pointer location.
formdata = *ptrToFormData
; If there is nothing here. Free the pointer and return.
IF N_Elements(formdata) EQ 0 THEN BEGIN
Ptr_Free, ptrToFormData
canceled = 1
RETURN, 0
ENDIF
; Did the user cancel out of the form? If so, return a 0.
IF formdata.cancel EQ 1 THEN BEGIN
Ptr_Free, ptrToFormData
canceled = 1
RETURN, 0
ENDIF
; Make the proper sized image array.
image = Make_Array(Dimension=formdata.dimensions, Type=formdata.type)
; We can have all kinds of trouble reading data. Let's catch all
; input and output errors and alert user without crashing the program!
Catch, theError
IF theError NE 0 THEN BEGIN
; If we can't read the file for some reason, let the user know
; why, free the pointer and its information, check the logical
; unit number back in if it is checked out, and return a 0.
ok = cgErrorMsg()
Ptr_Free, ptrToFormData
canceled = 1
IF N_Elements(lun) NE 0 THEN Free_Lun, lun
RETURN, 0
ENDIF
; Set the canceled flag.
canceled = formdata.cancel
; Read the data file.
IF formdata.header GT 0 THEN headdata = BytArr(formdata.header)
Get_Lun, lun
CASE formdata.endian OF
0: OpenR, lun, formdata.filename, XDR=formdata.xdr
1: OpenR, lun, formdata.filename, XDR=formdata.xdr, /Swap_If_Little_Endian
2: OpenR, lun, formdata.filename, XDR=formdata.xdr, /Swap_If_Big_Endian
ENDCASE
IF formdata.header GT 0 THEN ReadU, lun, headdata
ReadU, lun, image
Free_Lun, lun
; Free the pointer.
Ptr_Free, ptrToFormData
RETURN, image
END ; of GETIMAGE program ***************************************************
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