SuperPreview - (C)opyright 1993 Larry Bank About SuperPreview ------------------ I wrote SuperPreview as an outlet for my fax/document imaging experience starting in March of 1992. I have since created a 16-bit OS/2 1.x & Win 3.x version as well as a 32-bit OS/2 2.x & Win32S version. The 32-bit versions support full color, the 16-bit versions support only bi-level images. The reason I started with bi-level image support is because of some very fast routines I created for uncompressing/compressing and displaying bi-level images. The images are stored in memory in a compact run-length format and this allows gigantic images to be viewed without using much system memory and allows dynamic scaling without loss of performance; you will notice how fast images load and display. I am currently pursuing marketing of this product through various channels with additional features such as TWAIN scanner support and full color. I wanted to use a freeware version as a way to get feedback from users on various features, as well as let the OS/2 community have a fast, free image viewing tool. Please send me email (71552,1407) as to what features you would like to see added/removed as well as your overall impression of the application. The freeware version of SuperPreview has file saving disabled. Printing works, but I felt that being able to save might hurt my own marketing efforts. Performance & Compatibility --------------------------- This 16-bit OS/2 app has been tested on OS/2 1.3 on a PS/2 Mod 60 80286 machine as well as 386 & 486 machines running OS/2 2.1. As far as 32-bit versus 16-bit performance. Most of the app is written in highly optimized assembly language and there is no noticeable difference between 16 and 32-bit code. Using 386 features in 16-bit code only speeds it up a tiny bit. Notes on using SuperPreview --------------------------- Context sensitive help is available for all menu items by pressing F1. The only point that needs clarification is the zoom function. When opening a document. The first page is opened and displayed so that the entire document fits in the viewing window. To zoom into an area of interest: 1a) Press and hold the left mouse button and drag a box around the area of interest. 1b) Release the left mouse button. The selection rectangle will remain on the screen. You may copy the selected area to the OS/2 clipboard, or zoom in to the selected area by pressing the right mouse button. 2) A single click of the right mouse button will zoom in to 100% view (one document pixel = one screen pixel) at the spot clicked over if at other than 100%, or will zoom back out to full page view if already at 100% view. Supported File Formats ---------------------- TIFF - all bi-level compression types OS/2 1.2 BMP Win 3.X BMP PCX DCX WinFax QuickLinks II BitFax FAXIT IBM PSEG3820* IBM & OS/2 are trademarks of International Business Machines Corp.