diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/GlideDecoder.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/GlideDecoder.kt
deleted file mode 100644
index 5c0bd41b8..000000000
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/GlideDecoder.kt
+++ /dev/null
@@ -1,70 +0,0 @@
-package com.simplemobiletools.gallery.helpers
-
-import android.content.Context
-import android.graphics.Bitmap
-import android.graphics.Canvas
-import android.graphics.drawable.BitmapDrawable
-import android.graphics.drawable.Drawable
-import android.media.ExifInterface
-import android.net.Uri
-import com.bumptech.glide.Glide
-import com.bumptech.glide.load.engine.DiskCacheStrategy
-import com.bumptech.glide.request.RequestOptions
-import com.bumptech.glide.request.target.Target
-import com.davemorrissey.labs.subscaleview.decoder.ImageDecoder
-import com.simplemobiletools.gallery.activities.ViewPagerActivity
-import com.simplemobiletools.gallery.extensions.getFileSignature
-
-class GlideDecoder : ImageDecoder {
-    override fun decode(context: Context, uri: Uri): Bitmap {
-        val exif = android.media.ExifInterface(uri.path)
-        val orientation = exif.getAttributeInt(android.media.ExifInterface.TAG_ORIENTATION, android.media.ExifInterface.ORIENTATION_NORMAL)
-
-        val targetWidth = if (ViewPagerActivity.screenWidth == 0) Target.SIZE_ORIGINAL else ViewPagerActivity.screenWidth
-        val targetHeight = if (ViewPagerActivity.screenHeight == 0) Target.SIZE_ORIGINAL else ViewPagerActivity.screenHeight
-
-        ViewPagerActivity.wasDecodedByGlide = true
-        val options = RequestOptions()
-                .signature(uri.path.getFileSignature())
-                .diskCacheStrategy(DiskCacheStrategy.RESOURCE)
-                .override(targetWidth, targetHeight)
-
-        val degrees = getRotationDegrees(orientation)
-        if (degrees != 0) {
-            options.transform(GlideRotateTransformation(getRotationDegrees(orientation)))
-        }
-
-        val drawable = Glide.with(context)
-                .load(uri)
-                .apply(options)
-                .submit()
-                .get()
-
-        return drawableToBitmap(drawable)
-    }
-
-    private fun drawableToBitmap(drawable: Drawable): Bitmap {
-        if (drawable is BitmapDrawable && drawable.bitmap != null) {
-            return drawable.bitmap
-        }
-
-        val bitmap = if (drawable.intrinsicWidth <= 0 || drawable.intrinsicHeight <= 0) {
-            Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888)
-        } else {
-            Bitmap.createBitmap(drawable.intrinsicWidth, drawable.intrinsicHeight, Bitmap.Config.ARGB_8888)
-        }
-
-        val canvas = Canvas(bitmap)
-        drawable.setBounds(0, 0, canvas.width, canvas.height)
-        drawable.draw(canvas)
-        return bitmap
-    }
-
-    // rotating backwards intentionally, as SubsamplingScaleImageView will rotate it properly at displaying
-    private fun getRotationDegrees(orientation: Int) = when (orientation) {
-        ExifInterface.ORIENTATION_ROTATE_270 -> 90
-        ExifInterface.ORIENTATION_ROTATE_180 -> 180
-        ExifInterface.ORIENTATION_ROTATE_90 -> 270
-        else -> 0
-    }
-}