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5.0

Bitmap resize

Asked by moshem in Windows Programming, Font Creator

Tags: resize

Hi,

I wonder if you guys can help me out in an area I'm not so familiar with.

I need a *very fast* WIN32 function (no MFC or other heavy library) to resize an HBITMAP and return an new image as a new HBITMAP.

The exisiting WIN32 function StrechBlt does the job but does it very with very bad quality.

I mainly need it to reduce the size of a small bitmap, not bigger than 200x200 pixels, the smaller bitmap must be in good visual quality but does no have to be perfect.

It has to be fast since I plan to use it in real time to animate a bitmap in several sizes which I can only create on the fly.

I allready found some code snippetns on a newsgroup and it worked fine but it did not support 32-bit bitmaps with alpha channel information.

To summarize, I need a function that is :

1. Very fast
2. Support several bit depths including 32-bit (alpha channel)
3. No external libraries, need it to be slim.
4. take source WIN32 HBITMAP and return HBITMAP

your help is greatly appreciated,

thanks

Mike

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20091111-EE-VQP-92

Bitmap resize

Asked by moshem in Windows Programming, Font Creator

Tags: resize

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