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Bitmap scaling

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Started by Oleksiy Shelegov October 13, 2004 04:02 AM

3 comments, last by Oleksiy Shelegov 19 years, 6 months ago

Oleksiy Shelegov

122

Author

October 13, 2004 04:02 AM

Hello everyone, I just need a hint of where to start from. I need to implement hardware accelerated zooming in feature with dithering. What kind of API/interface should I use? Thanks ahead for your advices.

Drakonite

215

October 13, 2004 04:43 AM

Jus about the only way to do hardware accelerated anything with bitmaps requires rendering a textured quad and using the bitmap as the texture with a 3D rendering API such as the Direct3D component of DirectX or openGl.

Shoot Pixels Not People

Oleksiy Shelegov

122

Author

October 13, 2004 05:03 AM

But how ancient win32 2D games did that? Do that interfaces still exist?

I need to a starting point but your answer is a bit too complicated for me now. But thanks anyway!

Sandman

2,211

October 13, 2004 05:11 AM

I believe StretchBlt() will use hardware acceleration if it's available.

Oleksiy Shelegov

122

Author

October 13, 2004 06:01 AM

Thank you. I have tried StretchBlt() but my results aren't smooth enough for enlarging.

If I will go ahead with Direct3D will I find support for high-quality resizing algorithms like precise bicubic resampling?