59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// magickwand.go
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package main
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import (
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"math"
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"github.com/gographics/imagick/imagick"
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)
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func resizeImage(mw *imagick.MagickWand, newWidth, newHeight int, keepSpecSize, center bool) (resmw *imagick.MagickWand) {
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var (
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width, height, origHeight, origWidth int
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)
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origHeight = int(mw.GetImageHeight())
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//fmt.Println("hahahahahah :-P")
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origWidth = int(mw.GetImageWidth())
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if (origHeight != newHeight) || (origWidth != newWidth) {
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if (round((float64(origWidth) / float64(origHeight)) * float64(newHeight))) <= newWidth {
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width = round((float64(origWidth) / float64(origHeight)) * float64(newHeight))
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height = newHeight
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} else {
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height = round((float64(origHeight) / float64(origWidth)) * float64(newWidth))
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width = newWidth
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}
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} else {
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height = newHeight
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width = newWidth
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}
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resmw = imagick.NewMagickWand()
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if !keepSpecSize {
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resmw.NewImage(uint(width), uint(height), imagick.NewPixelWand())
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center = false
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} else {
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resmw.NewImage(uint(newWidth), uint(newHeight), imagick.NewPixelWand())
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//fmt.Println(resmw.GetImageHeight(), resmw.GetImageWidth())
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if center {
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err = mw.ResizeImage(uint(width), uint(height), imagick.FILTER_LANCZOS, 1)
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if err != nil {
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panic(err)
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}
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resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, round(float64(newWidth-width)/float64(2)), round(float64(newHeight-height)/float64(2)))
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} else {
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resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, 0, 0)
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}
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}
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mw.Destroy()
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return resmw
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}
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func round(a float64) int {
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if a < 0 {
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return int(math.Ceil(a - 0.5))
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}
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return int(math.Floor(a + 0.5))
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}
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