android: Add screen vertical alignment setting

It's a bit of a hack since I'm moving the view instead of telling the Vulkan surface to bias itself to the top/bottom/center but it works fine for now.

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/IntSetting.kt

@@ -25,6 +25,7 @@ enum class IntSetting(override val key: String) : AbstractIntSetting {
     OVERLAY_SCALE("control_scale"),
     OVERLAY_OPACITY("control_opacity"),
     LOCK_DRAWER("lock_drawer"),
+    VERTICAL_ALIGNMENT("vertical_alignment"),
     FSR_SHARPENING_SLIDER("fsr_sharpening_slider");
 
     override fun getInt(needsGlobal: Boolean): Int = NativeConfig.getInt(key, needsGlobal)

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/Settings.kt

@@ -93,4 +93,15 @@ object Settings {
                 entries.firstOrNull { it.int == int } ?: Unspecified
         }
     }
+
+    enum class EmulationVerticalAlignment(val int: Int) {
+        Top(1),
+        Center(0),
+        Bottom(2);
+
+        companion object {
+            fun from(int: Int): EmulationVerticalAlignment =
+                entries.firstOrNull { it.int == int } ?: Center
+        }
+    }
 }

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/view/SettingsItem.kt

@@ -225,6 +225,15 @@ abstract class SettingsItem(
                     R.array.rendererAspectRatioValues
                 )
             )
+            put(
+                SingleChoiceSetting(
+                    IntSetting.VERTICAL_ALIGNMENT,
+                    R.string.vertical_alignment,
+                    0,
+                    R.array.verticalAlignmentEntries,
+                    R.array.verticalAlignmentValues
+                )
+            )
             put(
                 SwitchSetting(
                     BooleanSetting.RENDERER_USE_DISK_SHADER_CACHE,

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/ui/SettingsFragmentPresenter.kt

@@ -148,6 +148,7 @@ class SettingsFragmentPresenter(
             add(IntSetting.MAX_ANISOTROPY.key)
             add(IntSetting.RENDERER_SCREEN_LAYOUT.key)
             add(IntSetting.RENDERER_ASPECT_RATIO.key)
+            add(IntSetting.VERTICAL_ALIGNMENT.key)
             add(BooleanSetting.PICTURE_IN_PICTURE.key)
             add(BooleanSetting.RENDERER_USE_DISK_SHADER_CACHE.key)
             add(BooleanSetting.RENDERER_FORCE_MAX_CLOCK.key)

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

@@ -15,7 +15,9 @@ import android.os.Handler
 import android.os.Looper
 import android.os.PowerManager
 import android.os.SystemClock
+import android.util.Rational
 import android.view.*
+import android.widget.FrameLayout
 import android.widget.TextView
 import android.widget.Toast
 import androidx.activity.OnBackPressedCallback
@@ -24,6 +26,7 @@ import androidx.core.content.res.ResourcesCompat
 import androidx.core.graphics.Insets
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.updateLayoutParams
 import androidx.core.view.updatePadding
 import androidx.drawerlayout.widget.DrawerLayout
 import androidx.drawerlayout.widget.DrawerLayout.DrawerListener
@@ -52,6 +55,7 @@ import org.yuzu.yuzu_emu.features.settings.model.BooleanSetting
 import org.yuzu.yuzu_emu.features.settings.model.IntSetting
 import org.yuzu.yuzu_emu.features.settings.model.Settings
 import org.yuzu.yuzu_emu.features.settings.model.Settings.EmulationOrientation
+import org.yuzu.yuzu_emu.features.settings.model.Settings.EmulationVerticalAlignment
 import org.yuzu.yuzu_emu.features.settings.utils.SettingsFile
 import org.yuzu.yuzu_emu.model.DriverViewModel
 import org.yuzu.yuzu_emu.model.Game
@@ -617,7 +621,46 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
     }
 
     private fun updateScreenLayout() {
-        binding.surfaceEmulation.setAspectRatio(null)
+        val verticalAlignment =
+            EmulationVerticalAlignment.from(IntSetting.VERTICAL_ALIGNMENT.getInt())
+        val aspectRatio = when (IntSetting.RENDERER_ASPECT_RATIO.getInt()) {
+            0 -> Rational(16, 9)
+            1 -> Rational(4, 3)
+            2 -> Rational(21, 9)
+            3 -> Rational(16, 10)
+            else -> null // Best fit
+        }
+        when (verticalAlignment) {
+            EmulationVerticalAlignment.Top -> {
+                binding.surfaceEmulation.setAspectRatio(aspectRatio)
+                val params = FrameLayout.LayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT,
+                    ViewGroup.LayoutParams.WRAP_CONTENT
+                )
+                params.gravity = Gravity.TOP or Gravity.CENTER_HORIZONTAL
+                binding.surfaceEmulation.layoutParams = params
+            }
+
+            EmulationVerticalAlignment.Center -> {
+                binding.surfaceEmulation.setAspectRatio(null)
+                binding.surfaceEmulation.updateLayoutParams {
+                    width = ViewGroup.LayoutParams.MATCH_PARENT
+                    height = ViewGroup.LayoutParams.MATCH_PARENT
+                }
+            }
+
+            EmulationVerticalAlignment.Bottom -> {
+                binding.surfaceEmulation.setAspectRatio(aspectRatio)
+                val params =
+                    FrameLayout.LayoutParams(
+                        ViewGroup.LayoutParams.MATCH_PARENT,
+                        ViewGroup.LayoutParams.WRAP_CONTENT
+                    )
+                params.gravity = Gravity.BOTTOM or Gravity.CENTER_HORIZONTAL
+                binding.surfaceEmulation.layoutParams = params
+            }
+        }
+        emulationState.updateSurface()
         emulationActivity?.buildPictureInPictureParams()
         updateOrientation()
     }

src/android/app/src/main/jni/android_settings.h

@@ -38,6 +38,13 @@ struct Values {
                                          Settings::Specialization::Default,
                                          true,
                                          true};
+    Settings::Setting<s32> vertical_alignment{linkage,
+                                              0,
+                                              "vertical_alignment",
+                                              Settings::Category::Android,
+                                              Settings::Specialization::Default,
+                                              true,
+                                              true};
 
     Settings::SwitchableSetting<std::string, false> driver_path{linkage, "", "driver_path",
                                                                 Settings::Category::GpuDriver};

src/android/app/src/main/res/values/arrays.xml

@@ -292,4 +292,15 @@
         <item>5</item>
     </integer-array>
 
+    <string-array name="verticalAlignmentEntries">
+        <item>@string/top</item>
+        <item>@string/center</item>
+        <item>@string/bottom</item>
+    </string-array>
+    <integer-array name="verticalAlignmentValues">
+        <item>1</item>
+        <item>0</item>
+        <item>2</item>
+    </integer-array>
+
 </resources>

src/android/app/src/main/res/values/strings.xml

@@ -560,6 +560,12 @@
     <string name="mute">Mute</string>
     <string name="unmute">Unmute</string>
 
+    <!-- Emulation vertical alignment -->
+    <string name="vertical_alignment">Vertical alignment</string>
+    <string name="top">Top</string>
+    <string name="center">Center</string>
+    <string name="bottom">Bottom</string>
+
     <!-- Licenses screen strings -->
     <string name="licenses">Licenses</string>
     <string name="license_fidelityfx_fsr" translatable="false">FidelityFX-FSR</string>