A couple of questions regarding animated GIFs. I have some code (from a Anders Melander demo) to create an animated GIF. I used it to stitch a series of weather maps together for my web site. Although the code did make reference to optimisation the total size of the GIF was almost the sum of all the images that made it up. I may be a bit naive in thinking that optimising would have found a lot of commonality in the images (due to the common map background) and the final product would have been a good deal smaller?
I have seen mention of animated GIFs in the ImageEn documentation but so is there a demo app that shows how to construct one frame by frame?
I know I can display an animated GIF using a TImage component - it surely must be possible to do the same thing in an ImageEN component - I've seen that there is a demo that does separate all the individual frames and I have loaded an animated GIF into a TImageEnView component - but how do you start animating it?
Thanks for the reply - yes I should have remembered - playing!
All I really wanted to do was overlay (for a short time) a 'loader' animated GIF on top of an image that I was downloading by means of a URL (see the http://www.ajaxload.info site for examples). Ideally this should be transparent - this is possible using a TImage component but I can't get the TImageEnMView to do this. I should have added a "built in loaded" option to your recent ImageEN survey! My efforts so far look rather pathetic and I will be heading back to using a progress bar by the looks of things!
That aside, I was also asking if the ImageEN components could help me dynamically build (as well as display) an animated GIF with optimisation from scratch (large weather maps for example), or should I stick with the code that I mentioned Anders Melander has made available on his site?
I too have a GIF animation question. I have used InsertToFileGIF to create a gif file that will be transmitted in a web page if the associated device is running to show animation on the web page. The image only plays one time and does not repeat. How do you make the object repeat playing?
It is relatively simple to use a TTimer to animate a GIF image in a TImageEnView by loading each frame on demand (in fact, we are thinking of adding a playing property to TImageEnView).
Of course, this assumes that the GIF is not so large that each frame can be loaded quick enough to display it, otherwise you should preload all the frames, e.g. into a TIEImageList
I'm afraid there is no functionality within ImageEn to optimize the repeated data in an animated GIF.
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Animated GIF
Posted - Sep 26 2012 : 11:33:09
