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Auto-width and height calculations now round instead of floor.

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This commit is contained in:
Mike Pulaski 2016-09-26 20:25:30 +02:00
parent 1278491e23
commit 552db7d3b5
2 changed files with 31 additions and 2 deletions
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12
resize.go
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@ -403,11 +403,11 @@ func imageCalculations(o *Options, inWidth, inHeight int) float64 {
// Fixed width, auto height
case o.Width > 0:
factor = xfactor
o.Height = int(math.Floor(float64(inHeight) / factor))
o.Height = roundFloat(float64(inHeight) / factor)
// Fixed height, auto width
case o.Height > 0:
factor = yfactor
o.Width = int(math.Floor(float64(inWidth) / factor))
o.Width = roundFloat(float64(inWidth) / factor)
// Identity transform
default:
o.Width = inWidth
@ -418,6 +418,14 @@ func imageCalculations(o *Options, inWidth, inHeight int) float64 {
return factor
}
func roundFloat(f float64) int {
if f < 0 {
return int(math.Ceil(f - 0.5))
} else {
return int(math.Floor(f + 0.5))
}
}
func calculateCrop(inWidth, inHeight, outWidth, outHeight int, gravity Gravity) (int, int) {
left, top := 0, 0