Scaling Rotation Shearing Reflection algorithms

i use EASYBMP library and i want to know the most effective开发者_高级运维 way to scale , rotate , shear and reflect algorithm. i want the most optimized to do it.

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The most effective way to scale, rotate, shear and reflect is to use the power of your graphics card - for example through OpenGL.

If you still want to do bitmap pixel operations yourself, typically you do this using linear algebra. This is not super easy to figure out, so I recommend finding some good study material, for example this book.

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Instead of telling you how to use EASYBMP (which looks like crap), I'm going to suggest you use Magick++ instead. It supports BMP and has all the methods you ask for built-in.

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Please refer to the Wikipedia link for the transformation matrices