Tech Articles


Using ImageMagick from PowerBuilder


ImageMagick is a free open-source software package that allows you to convert image files between formats, resize images and perform other functions. It can be used from the command line or as a COM object using PowerBuilder’s OLEObject functionality.

 

You can download the installer from here: http://www.imagemagick.org/script/binary-releases.php#windows

 

You must use one of the installers with the word “dynamic” in the description. I chose the Win32 installer because it offers a higher resolution than the Win64 Dynamic installer.

 

The command documentation for ImageMagick can be found here: http://www.imagemagick.org/script/command-line-tools.php

 

There are several commands that are supported by the COM interface.

 

compare: Compares two image files and returns information about the differences.

 

composite: Overlaps one image over another resulting in a third image file.

 

convert: Converts between image formats as well as resizing the image and other actions such as blur, crop, despeckle, and much more.

 

identify: Describes the format and characteristics of image files.

 

mogrify: Resizes the image and other actions such as blur, crop, despeckle, and much more. Mogrify overwrites the original image file, whereas, convert writes to a different image file.

 

montage: Creates a composite image by combining several separate images. The images are tiled on the composite image optionally adorned with a border, frame, image name, and more.

 

Here is an example that converts a JPG file to PNG:

 

OLEObject oMagick

String ls_origfile, ls_destfile

Integer li_rc

Any la_result

 

ls_origfile = “C:\PBSource\PB105\ImageMagick\Totoro.jpg”

ls_destfile = “C:\PBSource\PB105\ImageMagick\Totoro.png”

 

oMagick = Create OLEObject

 

li_rc = oMagick.ConnectToNewObject(“ImageMagickObject.MagickImage”)

If li_rc = 0 Then

   la_result = oMagick.Convert(ls_origfile, “-format”, “png”, ls_destfile)

   MessageBox(“Convert”, “Result: ” + String(la_result))

Else

   MessageBox(“ConnectToNewObject”, “Failed: ” + String(li_rc), StopSign!)

End If

 

oMagick.DisconnectObject()

 

Destroy oMagick

Comments (0)
There are no comments posted here yet

Find Articles by Tag

Git NativePDF Oracle Configuration PDF Azure Import ActiveX SVN Database Table Data Database Object Database Painter SQL Text PowerBuilder Compiler Deployment Authorization DragDrop RichTextEdit Control PDFlib Menu Excel COM XML PowerScript (PS) Application .NET DataStore Filter Script MessageBox 64-bit TreeView .NET Std Framework GhostScript Stored Procedure Database Connection JSONGenerator Array Charts UI Modernization Repository CoderObject WebBrowser Open Source DataType Windows OS Source Control UI Bug SnapObjects CI/CD Automated Testing PFC Messagging Database Table Window CrypterObject Outlook PowerBuilder (Appeon) Web Service Proxy Database Table Schema TortoiseGit External Functions Transaction Web API Mobile JSON Installation WinAPI Class Export SQL Server Migration Debug Windows 10 Icons Testing ODBC Performance Jenkins DataWindow JSON SOAP Design Service PostgreSQL ODBC driver Import JSON Encryption PostgreSQL TFS UI Themes Export JSON DataWindow Expression License API Branch & Merge Database Profile IDE PowerServer Mobile Graph Resize Error DLL InfoMaker Validation SnapDevelop Data PowerBuilder Event OAuth 2.0 PBDOM OAuth Elevate Conference File C# BLOB Icon REST DevOps Interface TLS/SSL Debugging Sort HTTPClient Trial Event Handling JSONParser OrcaScript PowerServer Web Encoding SqlModelMapper Source Code RibbonBar iOS Linux OS SDK Database SqlExecutor Platform RESTClient Authentication Debugger 32-bit OLE Syntax Model .NET Assembly RibbonBar Builder Event Handler Variable Android