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1

A rotation is essentially that for each sample in the resulting grid, find out which texels in your original texture that your filter footprint covers and interpolate them accordingly. This will be a lossy process, and if done repeatedly will quickly obliterate all interesting information in the image. If you only look at the nearest texel, you'll get a box ...


5

You can reduce the instruction count by using vector operations: e.g. instead of edr = bool4((w1.x < w2.x) && ir_lv1.x, (w1.y < w2.y) && ir_lv1.y, (w1.z < w2.z) && ir_lv1.z, (w1.w < w2.w) && ir_lv1.w); you can write edr = (w1 < w2) && ir_lv1; Operators in HLSL ...


5

I got this working. It does not use the hqx filter, it uses the xBR filter (which I prefer). For me, this is not a problem. If you require the hqx filter then you'll want to convert the .cg files into their appropriate XNA equivalent. For completeness and searching reasons, I will be editing the question to be more concise and then posting all the relevant ...



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