What would be a higher quality alternative to StretchBlt for drawing an HBITMAP?

Question

I don't want to use GDI+'s DrawImage because of speed issues. What other ways are there to draw an image resized with decent quality - at least linear or cubic interpolation?

score 7 · Accepted Answer · answered Jan 01 '11 at 01:29

7

You can use SetStretchBltMode with the HALFTONE setting, but you'll probably run into the same speed issues that you faced with GDI+ -- smoothing always comes at a cost.

answered Jan 01 '11 at 01:29

casablanca

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I tried that and it didn't seem to change anything. Which HDC do I give it? – jnm2 Jan 01 '11 at 01:31
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@jnm2: Use `SetStretchBltMode` with the destination HDC that you use for `StretchBlt`. – casablanca Jan 01 '11 at 01:36
Thanks! It's not perfect, but it's much better. – jnm2 Jan 01 '11 at 03:56

What would be a higher quality alternative to StretchBlt for drawing an HBITMAP?

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