CiImageResize.kt

package com.netvirta.ci_image_resize_plugin

import javax.imageio.ImageIO
import java.awt.image.BufferedImage;
import java.io.File
import javax.imageio.stream.ImageInputStream

class CiImageResize {

    fun resize(inputJpgFilePath: String, outputJpgFilePath: String, outputWidth: Int, outputHeight: Int) {
        val fileInputStream = File(inputJpgFilePath).inputStream()
        val originalImage = ImageIO.read(fileInputStream)
        val type = if (originalImage.type == 0){
            BufferedImage.TYPE_INT_ARGB
        } else {
            originalImage.type
        }

        val resizedImage = resizeImage(originalImage, type, outputWidth, outputHeight)
        val outputFile = File(outputJpgFilePath)
        outputFile.parentFile.mkdirs()
        ImageIO.write(resizedImage, "jpg", outputFile)
        fileInputStream.close()
    }

    private fun resizeImage(originalImage: BufferedImage, type: Int, outputWidth: Int, outputHeight: Int): BufferedImage{
        val resizedImage = BufferedImage(outputWidth, outputHeight, type)
        val g = resizedImage.createGraphics()
        g.drawImage(originalImage, 0, 0, outputWidth, outputHeight, null)
        g.dispose()

        return resizedImage
    }
}