I'm having some troubles with scaling and maintaining the pixelated look of my textures.



That one is 16x16 and I want to be able to scale it up to any size and still have the same pixelated style.
This is what it looks like when i scale it to 256x256:



As you can see it's very blurry but I've been able to improve the result a bit by setting AlphaBlendEnable = FALSE in my pixel shader, that makes it look like this:




Removing alpha blending makes the border look right, but it's still very blurry inside. I tried to scale up the 16x16 texture in paint to a much bigger size and the result was exactly like I wanted, so I'm sure it's possible to do this with DirectX as well. Does anyone know what render states I should set to get the result I want? Or if there's something else I'm missing please tell me.

I hope there weren't to many images in this post, I really wanted to be clear about my problem.

Thanks

I think you have to change the filter mode in your sampler description.

if your using direct3d 11, then when you fill out the D3D11_SAMPLER_DESC change the Filter member to D3D11_FILTER_MIN_MAG_MIP_POINT

the same is for direct3d 10 except you use D3D10_FILTER_MIN_MAG_MIP_POINT.

I hope i'm right, at least it worked for me when i wanted to keep my images pixelated when they are stretched

Thanks guys! I'm using DirectX 9 so setting MagFilter = POINT did the trick. It works like a charm

If you're using POINT sampling for pixelated textures, you may need to offset your texture coordinates by half a pixel (0.5 / size), or you can end up with weird texturing issues that may be hard to spot at first.