Thanks for the explanation Bill. Is it a performance decision? I never noticed a redraw delay problem in 4.5.3. Is it reasonable to make it a user choice? I certainly do miss having that IE reduced zoom view.
Ed -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of William W. Fisher Sent: Wednesday, September 12, 2007 12:12 PM To: InterMapper Discussion Subject: Re: [IM-Talk] InterMapper 4.6.2 poor web graphics Konowal, Ed wrote: > I have two copies... In the older version 4.5.3, web graphics are good. > But in the current 4.6.2, web graphics are not. > > At normal resolution you can't tell the difference. but IE has the > ability to shrink the web page using 'ctrl' - or +. This is a great > feature for Intermapper!! I can reduce an IE window to a corner of my > screen and still monitor my entire LAN!! > > The problem is that something changed in the last few revs. If I > shrink the view in 4.5.3, it's still readable after 5 steps. But in > 4.6.2, you can see it start to degrade after only ONE step. It's > completely unreadable at 4 zoom reduction steps. > > What's happened? In 4.5.4, we changed how the map images are rendered for the web page. Prior to version 4.5.4, map images were generated by drawing the background image first, then drawing the map on top of it. This image compositing step takes place within the InterMapper server so only one image is generated and there is no transparency involved. In 4.5.4 and later, the map image is transparent. It is composited onto the background image within the *browser* instead. The background image is sent separately so it can be cached by the browser and doesn't need to be sent every time. The browser simply fetches the latest "transparent" map image and places it in the same pixel location on the unchanging background. The transparent map image is used even when there is no background image present, just the plain background. I've confirmed the IE behavior you are seeing. One fix may be to only use the transparent compositing trick with a real background image, not the plain colored background. Regards, Bill Fisher Dartware, LLC ____________________________________________________________________ List archives: http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ To unsubscribe: send email to: [EMAIL PROTECTED] ____________________________________________________________________ List archives: http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ To unsubscribe: send email to: [EMAIL PROTECTED]
