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ID: 13805, Rotate Pixels

by Earl F. Glynn Email:

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For Delphi, Version 3.0  to 4.0 716 downloads
Copyright: Commercial use requires permission

Size: 123,851 bytes
Updated on Mon, 16 Aug 1999 00:00:00 GMT
Originally uploaded on Mon, 16 Aug 1999 00:00:00 GMT
SHA1 Hash: CDCE0AAAE49183CE99220C7C160EE03A6FFF0711
MD5 Hash: C508846213A4FFA497CB6B4A4AA6DF7F

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RotatePixels shows how to rotate a bitmap multiples of 90 degrees with the Canvas Pixels Property. This technique is only effective for very small bitmaps because of the overhead in using the Pixels property. This method will be very slow for large bitmaps.

See Item 13803 for faster rotations of any angle using the TBitmap Scanline property.

See Item 13804 for bitmap flipping, reversing and rotation of multiples of 90 degrees.

For additional details, including subscript formulas for the rotations, see the "Lab Report" at
Keywords: Bitmap Rotation, Pixels property

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