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Hi,

so SDL_RenderCopy() can do automatical scaling for me but is there also a way to
turn interpolation on or off? AFAICS it's currently always scaling without any
interpolation. Is there a way to turn interpolation on for SDL_RenderCopy()?

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SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");

Not sure at which point it takes effect though (maybe it takes effect
only the moment a texture is created).
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Yes, you need to set the hint BEFORE creating the texture

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On Fri, Aug 15, 2014 at 1:43 AM, Sik the hedgehog wrote:

Thanks, this seems to work fine. Is this a per texture setting or a global one?

On 15.08.2014 at 05:01 Pallav Nawani wrote:








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2014-08-15 7:15 GMT-03:00, Andreas Falkenhahn:

That's the part I said I didn't know It does seem like it's
intended to be a global setting but it could be getting checked just
when the textures get created (which would make it per texture). I'm
not even sure if this changes depending on the renderer.

If you just want to interpolate everything just set the hint before
you create the renderer. It's going to be safer.

PS: forgot to mention, the software renderer will *not* do
interpolation as far as I know (not sure). Then again, if SDL ends up
falling back to that one you probably don't want to use interpolation
either (at this point lack of performance will be your biggest issue).
It should only happen if something is wrong anyway (unless you
explicitly ask for it).
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On 15.08.2014 at 12:49 Sik the hedgehog wrote:



Looking at the source code I think it's local to the texture, at least for the
OpenGL backend that is.

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