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Fix for pixel jerk

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This commit is contained in:
Killy 2020-04-30 18:30:51 +03:00
commit bac1ff4ba0
1 changed files with 19 additions and 0 deletions
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19
Greenshot/Drawing/Surface.cs
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@ -1440,6 +1440,25 @@ namespace Greenshot.Drawing
LOG.Debug("Empty cliprectangle??");
return;
}
// Correction to prevent rounding errors at certain zoom levels.
// When zooming to N/M, clip rectangle top and left coordinates should be multiples of N.
if (_zoomFactor.Numerator > 1 && _zoomFactor.Denominator > 1)
{
int horizontalCorrection = targetClipRectangle.Left % (int)_zoomFactor.Numerator;
int verticalCorrection = targetClipRectangle.Top % (int)_zoomFactor.Numerator;
if (horizontalCorrection != 0)
{
targetClipRectangle.X -= horizontalCorrection;
targetClipRectangle.Width += horizontalCorrection;
}
if (verticalCorrection != 0)
{
targetClipRectangle.Y -= verticalCorrection;
targetClipRectangle.Height += verticalCorrection;
}
}
Rectangle imageClipRectangle = ZoomClipRectangle(targetClipRectangle, _zoomFactor.Inverse(), 2);
bool isZoomedIn = _zoomFactor > Fraction.Identity;