BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Zooming on images          BorlandTalk.com Forum Index -> C++ Builder (Graphics) View previous topic :: View next topic   Author Message Zannha Guest Posted: Wed May 26, 2004 1:59 pm    Post subject: Zooming on images How is this normally done? Is it just a matter of scaling the image? Thanks Back to top Malcolm Smith Guest Posted: Thu May 27, 2004 4:30 am    Post subject: Re: Zooming on images It depends on the quality you require. If you stretch you will get pixellation - I use ImageEn from www.hicomponents.com for my special needs and highly recommend it. -- Malcolm Smith MJ Freelancing http://www.mjfreelancing.com "Zannha" <asd> wrote Quote: How is this normally done? Is it just a matter of scaling the image? Thanks Back to top Damon Chandler (TeamB) Guest Posted: Thu May 27, 2004 4:11 pm    Post subject: Re: Zooming on images Hi, Most applications use the StretchBlt() function to draw the just visible portion of the bitmap in a scaled fashion. If you're zooming out, the "visible portion" is the whole image; if you're not zoomed in, the "visible portion" will depend on the size of your viewing window. Have a look at these two articles in the May '02 issue of the C++Builder Developer's Journal... * Display-optimal DIB section bitmaps * Fast bitmap zooming and scrolling They're available here... http://www.cppbuilderdevjournal.com/articles/articleindex.php Best of luck, -- Damon (TeamB) Zannha wrote: Quote: How is this normally done? Is it just a matter of scaling the image? Thanks Back to top Zannha Guest Posted: Thu May 27, 2004 10:32 pm    Post subject: Re: Zooming on images Thanks, i'll check out ImageEn and the resources linked to! Appreciate it! 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