creating GlideDecoder, to be used with subsamplingscaleimageview

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/GlideDecoder.kt

@@ -0,0 +1,49 @@
+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.net.Uri
+import com.bumptech.glide.Glide
+import com.bumptech.glide.load.DecodeFormat
+import com.bumptech.glide.load.engine.DiskCacheStrategy
+import com.bumptech.glide.request.RequestOptions
+import com.davemorrissey.labs.subscaleview.decoder.ImageDecoder
+
+
+class GlideDecoder : ImageDecoder {
+    override fun decode(context: Context, uri: Uri): Bitmap {
+        val options = RequestOptions()
+                .format(DecodeFormat.PREFER_ARGB_8888)
+                .diskCacheStrategy(DiskCacheStrategy.NONE)
+
+        val drawable = Glide.with(context)
+                .load(uri)
+                .apply(options)
+                .submit()
+                .get()
+
+        return drawableToBitmap(drawable)
+    }
+
+    private fun drawableToBitmap(drawable: Drawable): Bitmap {
+        if (drawable is BitmapDrawable) {
+            if (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
+    }
+}