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ID: 13820, Digital Magnifying Glass

by Earl F. Glynn Email:

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For Delphi, Version 3.0  to 4.0 1233 downloads
Copyright: Commercial use requires permission

Size: 233,537 bytes
Updated on Wed, 18 Aug 1999 00:00:00 GMT
Originally uploaded on Wed, 18 Aug 1999 00:00:00 GMT
MD5 Hash: 5031A335D33BA47BC6A7C1B637457A4F

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The Magnifier program demonstrates how to create a digital magnifying glass to enlarge a small selected area of an image. The selected area can be either a square or a circle.

For additional details, including a screen display of the circular magnifier, see the "Lab Report" at

CopyMode, cmSrcCopy, cmSrcAnd, Bitmap Mask, CopyRect, Transparent, Draw, Ellipse, Rectangle, Invalidate, GetPixelFormatString, IsPaletteDevice, LoadGraphicsFile, Magnification Factor, BMP, JPG, WMF, EMF, GIF, WmEraseBkgnd, TIniFile, MulDiv, OpenPictureDialog, TPicture/TGraphic polymorphism

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