Add option to automatically split tall downloaded images (#7029)

* Auto split long images to improve performance of reader

* Auto split long images to improve performance of reader - fixed the sorting

* Improved performance of splitting by getting rid of 1 extra loop

* Cleaned up code and moved the functionality to work during the downloading process (unsure how this affects download speed)

* Replaced the import .* with the actual used imports

* Fixes for Bugs discovered during my testing

* Fixed last split missing bug.

* Reordered the download progress to be updated before splitting instead of after to reflect more meaningful progress of download

* Reverted last commit since it had no effect

* Improved progress tracking when a download is paused then resumed.

* Implemented the recommended changes to enhance the feature.

* Apply suggestions from code review

Co-authored-by: arkon <arkon@users.noreply.github.com>

* Update app/src/main/res/values/strings.xml

Co-authored-by: arkon <arkon@users.noreply.github.com>

Co-authored-by: arkon <arkon@users.noreply.github.com>

app/src/main/java/eu/kanade/tachiyomi/util/system/ImageUtil.kt

@@ -115,6 +115,24 @@ object ImageUtil {
         return options.outWidth > options.outHeight
     }
 
+    /**
+     * Check whether the image is considered a tall image
+     * @return true if the height:width ratio is greater than the 3:!
+     */
+    fun isTallImage(imageStream: InputStream): Boolean {
+        imageStream.mark(imageStream.available() + 1)
+
+        val imageBytes = imageStream.readBytes()
+        // Checking the image dimensions without loading it in the memory.
+        val options = BitmapFactory.Options().apply { inJustDecodeBounds = true }
+        BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size, options)
+        val width = options.outWidth
+        val height = options.outHeight
+        val ratio = height / width
+
+        return ratio > 3
+    }
+
     /**
      * Extract the 'side' part from imageStream and return it as InputStream.
      */