42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
// This file is part of FexGenericFilter and (C) 2006 by Hajo Krabbenhöft (tentacle)
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// All rights reserved but the aegisub project is allowed to use it.
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{
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double width = FilterWidth;
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#ifdef CONTRIB_XSCALE
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width /= XScale;
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double fscale = 1.0 / XScale;
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#endif
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for(int i=0;i<ImageOutSX;++i)
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{
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double center = (double) i / XScale;
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FexFilterContribution* cc = &Contrib[i];
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int left = (int) ceil(center - width);
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int right = (int) (floor(center + width) + 0.1);
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cc->xMin = left;
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cc->xMax = right;
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if( cc->xMin < 0 ) cc->xMin = 0;
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if( cc->xMax > ImageInSX-1 ) cc->xMax = ImageInSX - 1;
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int len = cc->xMax-cc->xMin+1;
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cc->Weight = new double[ len ];
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memset( cc->Weight, 0x00, sizeof(double)*len );
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for(int j=left;j<=right;++j) {
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double weight = center - (double) j;
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#ifdef CONTRIB_XSCALE
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weight = FilterWeight(weight / fscale) / fscale;
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#else
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weight = FilterWeight(weight);
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#endif
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int n;
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if(j < 0) n=0;
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else if(j >= ImageInSX) n = ImageInSX - 1;
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else n = j;
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cc->Weight[n-cc->xMin] += weight;
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}
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}
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}
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