android: Reshape the layout to fit rotation

src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt

@@ -21,6 +21,7 @@ import android.hardware.SensorManager
 import android.hardware.display.DisplayManager
 import android.os.Build
 import android.os.Bundle
+import android.util.DisplayMetrics
 import android.util.Rational
 import android.view.Display
 import android.view.InputDevice
@@ -28,6 +29,7 @@ import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.Surface
 import android.view.View
+import android.view.WindowManager
 import android.view.inputmethod.InputMethodManager
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
@@ -76,6 +78,8 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
 
     private val settingsViewModel: SettingsViewModel by viewModels()
 
+    var screenDimensions : IntArray = intArrayOf()
+
     override fun onDestroy() {
         stopForegroundService(this)
         super.onDestroy()
@@ -103,6 +107,8 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
         setContentView(R.layout.activity_emulation)
         window.decorView.setBackgroundColor(getColor(android.R.color.black))
 
+        screenDimensions = getDisplayParams()
+
         // Find or create the EmulationFragment
         emulationFragment =
             supportFragmentManager.findFragmentById(R.id.frame_emulation_fragment) as EmulationFragment?
@@ -124,7 +130,7 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
             lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
                 WindowInfoTracker.getOrCreate(this@EmulationActivity)
                     .windowLayoutInfo(this@EmulationActivity)
-                    .collect { emulationFragment?.updateCurrentLayout(this@EmulationActivity, it) }
+                    .collect { emulationFragment?.updateFoldableLayout(this@EmulationActivity, it) }
             }
         }
 
@@ -312,6 +318,13 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
         return this.apply { aspectRatio?.let { setAspectRatio(it) } }
     }
 
+    private fun getDisplayParams(): IntArray {
+        return with (getSystemService(WINDOW_SERVICE) as WindowManager) {
+            val metrics = maximumWindowMetrics.bounds
+            intArrayOf(metrics.width(), metrics.height())
+        }
+    }
+
     private fun PictureInPictureParams.Builder.getPictureInPictureActionsBuilder() : PictureInPictureParams.Builder {
         val pictureInPictureActions : MutableList<RemoteAction> = mutableListOf()
         val pendingFlags = PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE

src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/EmulationFragment.kt

@@ -223,16 +223,39 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
                         else -> { rotation }
                     }
                 }
+                getScaledOrDefaultView(newConfig)
                 NativeLibrary.notifyOrientationChange(emulatorLayout, rotation)
             }
         }
     }
 
+    private fun getScaledOrDefaultView(config: Configuration?) {
+        emulationActivity?.let {
+            val orientation = config?.orientation ?: resources.configuration.orientation
+            if (orientation == Configuration.ORIENTATION_PORTRAIT && !it.isInPictureInPictureMode) {
+                if (it.screenDimensions.isNotEmpty()) {
+                    binding.surfaceEmulation.layoutParams.width = it.screenDimensions[0]
+                    binding.overlayContainer.layoutParams.width = it.screenDimensions[0]
+                    binding.surfaceEmulation.layoutParams.height = it.screenDimensions[1]
+                    binding.overlayContainer.layoutParams.height = it.screenDimensions[1]
+                }
+            } else {
+                binding.surfaceEmulation.layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT
+                binding.overlayContainer.layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT
+                binding.surfaceEmulation.layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
+                binding.overlayContainer.layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
+            }
+            binding.surfaceEmulation.requestLayout()
+            binding.overlayContainer.requestLayout()
+        }
+    }
+
     fun isEmulationStatePaused() : Boolean {
         return this::emulationState.isInitialized && emulationState.isPaused
     }
 
     fun onPictureInPictureEnter() {
+        getScaledOrDefaultView(null)
         if (binding.drawerLayout.isOpen) {
             binding.drawerLayout.close()
         }
@@ -257,6 +280,7 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
         if (EmulationMenuSettings.showOverlay) {
             binding.surfaceInputOverlay.post { binding.surfaceInputOverlay.isVisible = true }
         }
+        getScaledOrDefaultView(null)
     }
 
     private fun refreshInputOverlay() {
@@ -319,7 +343,7 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
 
     private val Number.toPx get() = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, this.toFloat(), Resources.getSystem().displayMetrics).toInt()
 
-    fun updateCurrentLayout(emulationActivity: EmulationActivity, newLayoutInfo: WindowLayoutInfo) {
+    fun updateFoldableLayout(emulationActivity: EmulationActivity, newLayoutInfo: WindowLayoutInfo) {
         val isFolding = (newLayoutInfo.displayFeatures.find { it is FoldingFeature } as? FoldingFeature)?.let {
             if (it.isSeparating) {
                 emulationActivity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
@@ -339,7 +363,7 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
             binding.overlayContainer.updatePadding(0, 0, 0, 0)
             updateScreenLayout()
         }
-        binding.surfaceInputOverlay.requestLayout()
+        binding.surfaceEmulation.requestLayout()
         binding.inGameMenu.requestLayout()
         binding.overlayContainer.requestLayout()
     }

src/android/app/src/main/res/layout/fragment_emulation.xml

@@ -17,6 +17,7 @@
             android:id="@+id/surface_emulation"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
+            android:layout_gravity="center"
             android:focusable="false"
             android:focusableInTouchMode="false" />
 
@@ -31,6 +32,7 @@
                 android:id="@+id/surface_input_overlay"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
+                android:layout_gravity="bottom"
                 android:focusable="true"
                 android:focusableInTouchMode="true" />