Files
keepass-fidelity/app/src/main/java/net/helcel/fidelity/tools/BarcodeScanner.kt
2024-03-29 13:27:27 +01:00

61 lines
1.9 KiB
Kotlin

package net.helcel.fidelity.tools
import android.graphics.Bitmap
import androidx.annotation.OptIn
import androidx.camera.core.ExperimentalGetImage
import androidx.camera.core.ImageAnalysis
import com.google.zxing.BinaryBitmap
import com.google.zxing.MultiFormatReader
import com.google.zxing.NotFoundException
import com.google.zxing.RGBLuminanceSource
import com.google.zxing.ReaderException
import com.google.zxing.common.HybridBinarizer
import net.helcel.fidelity.tools.BarcodeFormatConverter.formatToString
import java.util.concurrent.Executors
@OptIn(ExperimentalGetImage::class)
object BarcodeScanner {
private fun processImage(
bitmap: Bitmap,
cb: (String?, String?) -> Unit
) {
val binaryBitmap = createBinaryBitmap(bitmap)
val reader = MultiFormatReader()
try {
val result = reader.decode(binaryBitmap)
cb(result.text, formatToString(result.barcodeFormat))
} catch (e: NotFoundException) {
cb(null, null)
} catch (e: ReaderException) {
cb(null, null)
}
}
private fun createBinaryBitmap(bitmap: Bitmap): BinaryBitmap {
val pixels = IntArray(bitmap.width * bitmap.height)
bitmap.getPixels(pixels, 0, bitmap.width, 0, 0, bitmap.width, bitmap.height)
val source =
RGBLuminanceSource(bitmap.width, bitmap.height, pixels)
return BinaryBitmap(HybridBinarizer(source))
}
fun analysisUseCase(cb: (String?, String?) -> Unit): ImageAnalysis {
val analysisUseCase = ImageAnalysis.Builder().build()
analysisUseCase.setAnalyzer(
Executors.newSingleThreadExecutor()
) { imageProxy ->
val bitmap = imageProxy.toBitmap()
imageProxy.close()
bitmapUseCase(bitmap, cb)
}
return analysisUseCase
}
fun bitmapUseCase(bitmap: Bitmap, cb: (String?, String?) -> Unit) {
processImage(bitmap, cb)
}
}