On Fri, Nov 14, 2008 at 11:02:37AM +0800, sunyinan wrote: > One of our customers proposed a issue that pictures with big > size, such as 2M or more, are inserted in the impress slide, when > we press F5 to show this slide, it is too slow so that he can not > accept it. > Hi Sunyinan,
interesting - so, another thing to try is surely the presentation minimizer extension, that scales down the images in the file already, saving on file size as well. > Then I tracked the code, I found that the bitmap drawn on the > screen has the original size from the cache. I thought it might be > way to improve the performance, so I scale the bitmap to a smaller > size before drawing it. Even if I have not used some tools to test > the performance, I think it should be better than before. > Oh? So, you're not sure your proposed fix does indeed speed up the rendering? That, I guess, should be the first thing to verify before embarking on fixing details... > The following codes are the difference in the dx_vcltools.cxx. > Generally, looks good. If the gdi+-method that renders the bitmap is indeed the bottleneck, I'd go for your fix, as this is really nothing to be decided in platform-independent code (as there, the actual output resolution is not generally known). Please consider subscribing to the lists you post to, otherwise you might miss replies going to the list only. Cheers, -- Thorsten --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
