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Optimisation for integral factors: favour shrink over affine
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@ -925,7 +925,7 @@ class PipelineWorker : public AsyncWorker {
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*/
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int CalculateShrink(double factor, int interpolatorWindowSize) {
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int shrink = 1;
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if (factor >= 2 && interpolatorWindowSize > 3) {
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if (factor >= 2.0 && trunc(factor) != factor && interpolatorWindowSize > 3) {
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// Shrink less, affine more with interpolators that use at least 4x4 pixel window, e.g. bicubic
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shrink = static_cast<int>(floor(factor * 3.0 / interpolatorWindowSize));
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} else {
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