Depends what Robert wants, but StretchDraw won't give you anything like the resampling quality of a decent resampling algorithm such as a Lanczos Kernel. If you want to see the difference without writing code, check out the freeware Irfanview image utility (www.irfanview.com) and try resizing an image using the various resampling algorithms available in that utility. One thing that I think a lot of people overlook is that a file format is just that: a file format. Once one has loaded an image from a file of a particular format, then the image in memory is simply a bitmapped image (or a raster image or whatever). At that point, it's completely divorced from the file format it happened to be last persisted in. C.
________________________________ From: delphi-boun...@delphi.org.nz [mailto:delphi-boun...@delphi.org.nz] On Behalf Of John Bird Sent: Tuesday, 13 October 2009 5:13 p.m. To: NZ Borland Developers Group - Delphi List Subject: Re: [DUG] Image manipulation I have a neat program that can picks a JPG file, converts JPG to BMP and back and resize it at will too. The trick is that you can resize as a BMP, but save back as a JPG Can email the rest of the project, but here is the main unit to show its not hard to do... This program zooms a bevel in and out to show the size of the image will be when resized, but does not actually resize until you click resize now, as the image would lose quality by being continuously resized. Its all done by about 4 lines in the ResizeNow procedure [snip]
_______________________________________________ NZ Borland Developers Group - Delphi mailing list Post: delphi@delphi.org.nz Admin: http://delphi.org.nz/mailman/listinfo/delphi Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: unsubscribe
