Add "Rotate wide pages to fit" for webtoon reader too

Closes #1977

app/src/main/java/eu/kanade/tachiyomi/ui/reader/setting/ReaderPreferences.kt

@@ -86,6 +86,10 @@ class ReaderPreferences(
 
     fun dualPageRotateToFitInvert() = preferenceStore.getBoolean("pref_dual_page_rotate_invert", false)
 
+    fun dualPageRotateToFitWebtoon() = preferenceStore.getBoolean("pref_dual_page_rotate_webtoon", false)
+
+    fun dualPageRotateToFitInvertWebtoon() = preferenceStore.getBoolean("pref_dual_page_rotate_invert_webtoon", false)
+
     // endregion
 
     // region Color filter

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonConfig.kt

@@ -62,6 +62,18 @@ class WebtoonConfig(
         readerPreferences.dualPageInvertWebtoon()
             .register({ dualPageInvert = it }, { imagePropertyChangedListener?.invoke() })
 
+        readerPreferences.dualPageRotateToFitWebtoon()
+            .register(
+                { dualPageRotateToFit = it },
+                { imagePropertyChangedListener?.invoke() },
+            )
+
+        readerPreferences.dualPageRotateToFitInvertWebtoon()
+            .register(
+                { dualPageRotateToFitInvert = it },
+                { imagePropertyChangedListener?.invoke() },
+            )
+
         readerPreferences.webtoonDoubleTapZoomEnabled()
             .register(
                 { doubleTapZoom = it },

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonPageHolder.kt

@@ -210,6 +210,10 @@ class WebtoonPageHolder(
     }
 
     private fun process(imageStream: BufferedInputStream): InputStream {
+        if (viewer.config.dualPageRotateToFit) {
+            return rotateDualPage(imageStream)
+        }
+
         if (viewer.config.dualPageSplit) {
             val isDoublePage = ImageUtil.isWideImage(imageStream)
             if (isDoublePage) {
@@ -221,6 +225,16 @@ class WebtoonPageHolder(
         return imageStream
     }
 
+    private fun rotateDualPage(imageStream: BufferedInputStream): InputStream {
+        val isDoublePage = ImageUtil.isWideImage(imageStream)
+        return if (isDoublePage) {
+            val rotation = if (viewer.config.dualPageRotateToFitInvert) -90f else 90f
+            ImageUtil.rotateImage(imageStream, rotation)
+        } else {
+            imageStream
+        }
+    }
+
     /**
      * Called when the page has an error.
      */