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}

protected override void Render(HtmlTextWriter writer)

{

writer.Write("<iframe id=TIFFServer WIDTH=\"100%\"

height=\"100%\" src=\"");

writer.Write("/tiffserver/tiffserver.aspx?at_url="+docURL);

writer.Write(TIFFServerParams);

writer.Write("\">");

base.Render (writer);

}

..........

}

10.3 Application Integration for Shared Sessions

In order to make use of Session-based XML virtual documents it is necessary to the ASP.Net

application incorporate TIFF Server so that TIFF Server has access to the same set of session variables.

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11 U

SING

TAMPS

The TIFF Image Server allows dynamic and static textual stamps to be placed onto the images and PDF

documents by means of a stamps configuration file (stamps.txt in the stamps directory) together with

appropriate URL parameters.

Supported compression schemes for use of this feature are :



CCITT Group 3 (1-D), Group 3 (2-D)



CCITT Group 4



CCITT RLE



Uncompressed (Bitonal)

11.1 Stamp Placement

The image above indicates the possible placement for stamps. These are determined according to the

parameters in the stamps.txt configuration file. The product comes with a sample set of stamps that are

used with the sample images.

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11.2 Stamp Specifications

For example, the stamp that reads “Ctr Ctr Up Diagonal” would be produced by the following

lines in

the file :

BEGINSTAMP

afsName=STAMP

afsText=Ctr Ctr Up Diagonal

afsFontSize=63

afsFont=HELVETICA

afsTextMode=1

afsVpos=CENTER

afsHpos=CENTER

afsDiag=UP

ENDSTAMP

Here is a description of each of the parameters which are case sensitive :

Parameter

Description

BEGINSTAMP

Required to mark the beginning of a stamp specification.

ENDSTAMP

Required to mark the end of a stamp specification.

afsName

Stamp name. If the stamp name is “STAMP” then the stamp will always be applied.

Any other name is used as an identifier and the stamp will only be applied when the

at_sn or SN parameters match the name. (See the reference guide section on

integration, and the sample pages for details)

afsText

Stamp text. This may be a fixed piece of text, or may include %p (which will be

replaced by the page number) or %s which will be replaced by the value of the at_sv

or SV parameters match the name. (See the reference guide section on integration, and

the sample pages for details)

afsFontSize

Point size for the stamp text.

afsFont

Font to be used. The following are supported :

TIMES-ROMAN HELVETICA COURIER

afsTextMode

1=Outlined Text

2=Sold Text

afsVpos

Vertical Position of the stamp, which may be one of the following :

TOP CENTER BOTTOM

afsHpos

Horizontal Position of the stamp, which may be one of the following :

LEFT CENTER RIGHT

afsDiag

Diagonal orientation of the stamp, which may be one of the following :

NONE UP DOWN

afsWeight

Font Weight : 0 (default)

–

5 (most bold)

afsStartPage

First page of the document to which stamps should be applied (default 1)

afsEndPage

Last page of the document to which stamps should be applied (default 0 which means

there is not a limit)

afsPageIncrement

Determines whether stamps should only be applied every nth page where n is

afsPageIncrement. Default is 0 which means stamps will be applied to all pages

(subject to start/end page specifications).

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12 A

DVANCED

NTEGRATION

It is also possible to directly access the underlying TIFF Server component pages executable (tssp.aspx

or aquatiff.exe) in order to provide more customised capabilities. You may wish to review the source

code for the viewer to understand how to implement this type of integration.

Param

Allowable Values

Notes

Fully qualified file name of the TIFF

document to be displayed. Alternatively

may be a directory when used in

conjunction with MF (see below).

Mandatory.

For virtual documents. One of url, path

or session (tssp.aspx only)

Display the specified page number

Allowable range is 1

–

9999.

Optional. Default is 1.

Resize image to specified width in

pixels. Allowable range 1

–

9999.

Optional. NB If height is not specified, the resize

height will be calculated to preserve the aspect ratio.

Resize image to specified height in

pixels. Allowable range 1

–

9999.

Optional. NB If width is not specified, the resize

width will be calculated to preserve the aspect ratio.

If set to 1, fit to Window.

Optional. If set, requires both WI and HI to be set

with the width and height of the window.

Rotate the image clockwise by the

specified number of degrees.

Supported values are 90, 180 and 270.

Opional.

Invert the image (switch the

photometric value). Allowable values 1

(invert the current setting) or 0.

Optional.

Return page count. Allowable values

YES or NO.

This option should be used to determine the number

of pages in a document and is designed to be called as

the subject of <SCRIPT> SRC attribute.

A small piece of JavaScript code will be returned that

sets the value of afPageCount to the number of pages

in the document. Eg :

afPageCount=4;

This Error conditions are indicated by the following

negative values being set for afPageCount :

-1 : Image format unsupported

-2 : No valid licence key

-3 : Could not open image file

-4 : Invalid file type

Stamp Name

See section 6.

Stamp Value

Value to be substituted for %s in the stamp definition

string.

Multifile Merge

MF parameter should be used (and set=1) when

FN has been set to a directory of single page

TIFF files.

Example URLs

http://localhost/tiffserver/tssp.aspx?FN=D:\aquaforesttis\tis\samples\ccitt.tif&WI=796&PN=1

I=796&PN=1

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12.1 PDF File Generation

It is also possible to directly access the CGI executable (tiffpilot.exe) or ASP.Net page (tssppdf.aspx)

shown below. This also enables access to the PDF “Annotation Box” feature which creates a fixed

“annotation” at the top of each page.

The annotation will be a text box (black background, white text)

with contents determined by the parameters marked with an * below

–

an example is shown below.

Parameter

Allowable Values

Notes

Fully qualified file name of the

TIFF document to be displayed.

Mandatory.

Stamp Name

Stamp Value

Value to be substituted for %s in the stamp

definition string.

*AS

String

Annotation string. May include %p which

will be replaced by the page number., and %n

which will be replaced by the total number of

pages in the document.

*AH

Integer

Annotation “box” height (default value=13)

*AF

1-3

Font : 1=HELVETICA (default)

2=COURIER 3=TIMES-ROMAN

*AZ

Integer

Font Size (default value=9)

*AJ

1-3

Justification : 1=LEFT (default) 2=CENTER

3=RIGHT

Page Number

Start page number for sub-documents (also

see parameters for aquatiff.asp)

Page Count

Page count for sub-documents.

Scale Factor

SF allows a scale factor to be applied to the

image. So, for example SF=0.9 will scale the

TIFF Images to 90% of their original size.

Example URLs

http://localhost/tiffserver/tiffpilot.exe?FN=C:\inetpub\wwwroot\tiffserver\samples\ccitt.tif&PD=1

citt.tif&PD=1

12.2 Data Capture Zoning

To enable improved productivity in forms-based data capture processes, TIFF Server has a set of

support functions which can be used to control the exact section of a document that is displayed in the

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top left corner of the document viewer window, and provides a test harness to aid development of

applications that require such facilities.

The test harness http://yourserver/tiffserver/zoning.htm can be accessed in a similar fashion to the

sample pages.

The facility allows control of the X and Y point which appears at the top left hand corner of the

display, and can be controlled by making calls to TIFFServerAdjustDisplay() when required

–

for

example, moving around a form as a user tabs from one field to another.

The X and Y values are scaled between 0 and 1. To assist with determining what values should be

used to move to a particular point on a page, two methods are provided

–

TIFFServerEnableClickCapture() to enable the click point capture and TIFFServerGetLastClick()

which returns a string with the X and Y values separated by a comma. Capture of multiple point values

will require repeated use of both methods. The zoning.htm page shows usage of these methods.

To adjust the page display such that a particular point is at the top left hand corner of the display,

TIFFServerAdjustDisplay(x,y) can be used. Furthermore, to specify a new document to be displayed,

at a particular point and page, the TIFFServerNewDocument(at_url, at_pstart, x , y) method can be

used.

12.2.1 Calling The Methods

All the methods are client-side JavaScript in aquatiff.asp. Examples of calling the methods are

provided in zoning.htm. Calls take the form of <window ref>.methodname(params) where <window

ref> is determined by the reference to the window or frame that aquatiff.asp has been invoked in. For

example, in zoning.htm an iframe with an id of tiffserver is used, so method references such as

tiffserver.TIFFServerGetLastClick() may be used.

13 C

USTOMIZING AND

ONFIGURING

TIFF

ERVER

TIFF Server may be configured in a number of ways, controlled by variables in the config.inc,

config_ui.inc and config_lang.inc files.

13.1 Customising The Icon Set (config_ui.inc)

The product comes with a choice of 3 icon sets which define the look and feel.

var iconStyle="V3.0"; (This is the default) :

var iconStyle="V2.0";) :

var iconStyle="V1.2";

13.2 Display Customizations (config_ui.inc)

The following variables are supported to allow various display customizations as noted :

Config Variable

Notes

ts_thumbnail_width_standard

The pixel or percentage width of the thumbnail frame in thumbs-

left mode

ts_thumbnail_width_full

The pixel or percentage width of the thumbnail frame in thumbs-

ft mode when the display is launched using the “Full Window”

icon.

ts_fsc_thumbnail_width

The pixel width of the thumbnail in full thumbnail layout mode

ts_bgcolor

Frame background colors

ts_fgcolor

Text Color [Mainly for Thumbnail captions]

ts_info_fgcolor

Text Color for Infopane

ts_lhs_thumbnails_max

This is the maximum number of thumbnails in thumbs-left mode

The config.inc parameter can be set to the limit value. If the limit

value is exceeded, a link “View all Thumbnails” is displayed at the

bottom of the frame which if clicked will take the user to the

thumbnails layout page to view all the thumbnails.

iconStyle

Possible values are v1.2,v2.0,v3.0. Examples are shown above.

metroColor

Use this to set the theme color.

ts_use_sub_page_count

If it is set to true, then aquatiff.exe is not called to determine the

actual page count.

13.3 Configuring The Toolbar (config_ui.inc)

The image viewer toolbar may be configured by adjusting parameters in the config.inc file. Each

toolbar menu item has a boolean variable which determines whether the item should be displayed or

not. All toolbar items are shown by default and which variable relates to which option should be clear

from comments in the file. For example :

/* Fit Window */

var menu_ftw=true;

13.4 Configuring Printing (config_ui.inc)

By default the product is configured to use “PDF Printing” where the print button initiates the

generation of a PDF file (with an openaction of print set) into a hidden frame. This is transparent to the

user, but does require Acrobat Reader 5.0 or later to be available on the client PC. If the product is

being deployed in an environment where Acrobat Reader will not be available, it may be appropriate to

set

prnt_pdf

to false and consider adjusting

printWidth

/* Print Functionality - Set to True to Use PDF - */

/* if set to false JavaScript will be used, */

/* but this can only print the current page */

var prnt_pdf=true;

/* Print Width For JavaScript Printing */

var printWidth=650;

13.5 Configuring Pan Direction

The pan direction can be configured via panDirection which can be set to “reverse

y” or “standard.

Previous releases of TIFF Server did not have this option and behaviour was “reverse

y”

var panDirection="reverse-y";

13.6 Backend Configuration (config.inc)

TIFF Server supports a number of different backend options, and can be customized to support custom

methods. The supported backend options are as follows :

Option

Description

var ts_backend=".NET";

This is the default

–

image processing is carried

out via ASP.Net and .Net components

var ts_backend="DB";

This allows support for images stored in a SQL

Server database.

Option

Description

var ts_net_backend="GDIONLY";

This only applies when ts_backend=”.NET”. If

set to “GDIONLY”, the Microsoft

GDI+ classes

are used for image processing.

var ts_net_backend="LIBTIFF";

This uses LIBTIFF.net to read the images in the

backend, it is the best option for problematic files

like tiffs with old style jpeg compression.

var ts_net_backend="CUSTOM";

is only applies when ts_backend=”.NET”. If

set to “CUSTOM”

, a special customizable class is

used to obtain image and annotations. See 14.6

below.

Option

Description

var ts_pdf_backend=".NET";

;

PDF generation is carried out via ASP.Net and

.Net components.

var ts_pdf_backend="CGI";

PDF generation is initiated by .Net and passed to

the tiffpilot.exe CGI process.

var check_tiff_files = “true”

This variable was introduced to help with the

handling of problematic TIFF files, it repairs the

file before converting it to a PDF file and it also

repairs the TIFF file before rendering it.

13.7 Custom Backend Development

TIFF Server is delivered with the C# source code for a special customizable class,

AquaforestTIFFServerStream. This class has three methods which can be used to customize TIFF

Server so that for example, the product can read encrypted TIFF images or read from a database other

than SQL Server.

The sample project uses a simple “encryption” scheme.

The Microsoft Visual Studio 2005 project can be found in custom/AquaforestTIFFServerStream in the

TIFF Server installation folder.

static public MemoryStream GetStream(string TIFFFilePath)

This method returns a TIFF file as a memory MemoryStream. The supplied implementation returns the

TIFF file specified by the TIFFFilePath parameter as a MemoryStream.

static public string GetAnnotations(string AnFilePath)

This method returns the contents of an annotation file as a file as a string. The supplied

implementation returns the annotation file specified by the AnFilePath parameter as a string.

static public bool SaveAnnotations(string FilePath, string Annotations)

This method saves the contents of an annotation file. The supplied implementation saves the string in

the specified annotation file.

13.7.1 Implementing a Custom Backend

This involves the following steps



Set ts_net_backend=”CUSTOM” in the config.inc file.



Make the required changes to the AquaforestTIFFServerStream class and rebuild.



Move the AquaforestTIFFServerStream.dll (from custom/AquaforestTIFFServerStream/bin)

to the bin directory.



Run iisreset

13.8 Edit Functionality and Custom Modules

When a custom backend is implemented the following custom method will be called :

CustomClass.SaveEditedImages(String TIFFFileName, MemoryStream[] TiffStreams, String

AnnotationFileName, MemoryStream[] AnnotationStreams)

Where FileName is the full path of the original TIFF file, and one MemoryStream is provided for each

newly generated TIFF file.

13.9 File Locking in Edit Functionality with Custom Modules

If locking is turned on (via lock_editdoc in config.inc) and the backend is CUSTOM call will be made

to a custom module to Lock before opening the edit page :

Bool CustomClass.Lock(string FileName)

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