Bitmap Per-Pixel Manipulation

[snarfblam]

A few people have asked about bitmap manipulation recently. The biggest problem with GDI+ is that it can be pretty slow, especially on color-based per-pixel operations, since the only easy means of doing this is with the GetPixel/SetPixel function pair, which is slow

 

This tutorial explains how to lock bitmaps and more directly access the data to give your app a huge performance boost. Code examples and samples are given in C#, but a language-neutral approach was taken (no pointers) so that the code can easily be converted to VB or C++ and is verifiable by the runtime.

 

http://ilab.ahemm.org/tutBitmap.html

 

Comments are welcome, here or by e-mail. Enjoy. Or don't. Whatever.

[snarfblam]

Attached tutorial here because of hosting problems.

BitmapTutorial.zip