How to Bilinear scaling?

[xysh]

Some graphic cards such as wildcats serial say they can do 'Bilinear scaling' 2D Operations. How can I use this feature in my codes?

[dorbie]

Depends what they mean by the claim. glPixelZoom is the call which springs to mind.

[AdrianD]

copy your bitmap in texturemem, and draw them with a quad -> so you get scaling/roation/blending for free.

[xysh]

glPixelZoom is nearnest scale as I know , not bilinear scale.

[xysh]

Originally posted by AdrianD:
copy your bitmap in texturemem, and draw them with a quad -> so you get scaling/roation/blending for free.

My image is very large, texture mapping is not suitable. I guest they can do bilinear scale with glPixelZoom, but how to?