feat: Implement 32:9 aspect ratio

This commit introduces support for a 32:9 aspect ratio throughout Citron.

Key changes include:

-   **Enum Updates**: Added `R32_9` to `Settings::AspectRatio` and `Layout::AspectRatio` enums, ensuring consistent integer mapping for casting between them.
-   **Core Logic**:
    -   Modified `UISettings::CalculateWidth` to correctly compute width for the 32:9 ratio.
    -   Updated `Layout::EmulationAspectRatio` to handle the new `R32_9` case and return the appropriate float value (9.0f / 32.0f).
-   **Android Integration**:
    -   Updated `EmulationFragment.kt` and `EmulationActivity.kt` (for Picture-in-Picture) to recognize and apply the 32:9 aspect ratio (mapping setting value `4` to `Rational(32, 9)`).
-   **UI Configuration**:
    -   Added "Force 32:9" to the aspect ratio selection in the graphics settings UI via `shared_translation.cpp`. This string is translatable.

This enhancement allows users to utilize ultra-widescreen 32:9 displays for a more immersive experience.

Signed-off-by: Zephyron <zephyron@citron-emu.org>

src/android/app/src/main/java/org/citron/citron_emu/activities/EmulationActivity.kt

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-FileCopyrightText: 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 package org.citron.citron_emu.activities
@@ -312,6 +313,7 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
             1 -> Rational(4, 3)
             2 -> Rational(21, 9)
             3 -> Rational(16, 10)
+            4 -> Rational(32, 9)
             else -> null // Best fit
         }
         return this.apply { aspectRatio?.let { setAspectRatio(it) } }

src/android/app/src/main/java/org/citron/citron_emu/fragments/EmulationFragment.kt

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-FileCopyrightText: 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 package org.citron.citron_emu.fragments
@@ -577,6 +578,7 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
             1 -> Rational(4, 3)
             2 -> Rational(21, 9)
             3 -> Rational(16, 10)
+            4 -> Rational(32, 9)
             else -> null // Best fit
         }
         when (verticalAlignment) {

src/citron/configuration/shared_translation.cpp

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "citron/configuration/shared_translation.h"
@@ -56,18 +57,18 @@ std::unique_ptr<TranslationMap> InitializeTranslations(QWidget* parent) {
     // Core
     INSERT(
         Settings, use_multi_core, tr("Multicore CPU Emulation"),
-        tr("This option increases CPU emulation thread use from 1 to the Switch’s maximum of 4.\n"
+        tr("This option increases CPU emulation thread use from 1 to the Switch's maximum of 4.\n"
-           "This is mainly a debug option and shouldn’t be disabled."));
+           "This is mainly a debug option and shouldn't be disabled."));
     INSERT(
         Settings, memory_layout_mode, tr("Memory Layout"),
         tr("Increases the amount of emulated RAM from the stock 4GB of the retail Switch to the "
-           "developer kit's 8/6GB.\nIt’s doesn’t improve stability or performance and is intended "
+           "developer kit's 8/6GB.\nIt's doesn't improve stability or performance and is intended "
            "to let big texture mods fit in emulated RAM.\nEnabling it will increase memory "
            "use. It is not recommended to enable unless a specific game with a texture mod needs "
            "it."));
     INSERT(Settings, use_speed_limit, QStringLiteral(), QStringLiteral());
     INSERT(Settings, speed_limit, tr("Limit Speed Percent"),
-           tr("Controls the game's maximum rendering speed, but it’s up to each game if it runs "
+           tr("Controls the game's maximum rendering speed, but it's up to each game if it runs "
               "faster or not.\n200% for a 30 FPS game is 60 FPS, and for a "
               "60 FPS game it will be 120 FPS.\nDisabling it means unlocking the framerate to the "
               "maximum your PC can reach."));
@@ -125,7 +126,7 @@ std::unique_ptr<TranslationMap> InitializeTranslations(QWidget* parent) {
               "Options lower than 1X can cause rendering issues."));
     INSERT(Settings, scaling_filter, tr("Window Adapting Filter:"), QStringLiteral());
     INSERT(Settings, fsr_sharpening_slider, tr("FSR Sharpness:"),
-           tr("Determines how sharpened the image will look while using FSR’s dynamic contrast."));
+           tr("Determines how sharpened the image will look while using FSR's dynamic contrast."));
     INSERT(Settings, anti_aliasing, tr("Anti-Aliasing Method:"),
            tr("The anti-aliasing method to use.\nSMAA offers the best quality.\nFXAA has a "
               "lower performance impact and can produce a better and more stable picture under "
@@ -188,7 +189,7 @@ std::unique_ptr<TranslationMap> InitializeTranslations(QWidget* parent) {
         tr("Runs work in the background while waiting for graphics commands to keep the GPU from "
            "lowering its clock speed."));
     INSERT(Settings, max_anisotropy, tr("Anisotropic Filtering:"),
-           tr("Controls the quality of texture rendering at oblique angles.\nIt’s a light setting "
+           tr("Controls the quality of texture rendering at oblique angles.\nIt's a light setting "
               "and safe to set at 16x on most GPUs."));
     INSERT(Settings, gpu_accuracy, tr("Accuracy Level:"),
            tr("GPU emulation accuracy.\nMost games render fine with Normal, but High is still "
@@ -406,6 +407,7 @@ std::unique_ptr<ComboboxTranslationMap> ComboboxEnumeration(QWidget* parent) {
                               PAIR(AspectRatio, R4_3, tr("Force 4:3")),
                               PAIR(AspectRatio, R21_9, tr("Force 21:9")),
                               PAIR(AspectRatio, R16_10, tr("Force 16:10")),
+                              PAIR(AspectRatio, R32_9, tr("Force 32:9")),
                               PAIR(AspectRatio, Stretch, tr("Stretch to Window")),
                           }});
     translations->insert({Settings::EnumMetadata<Settings::AnisotropyMode>::Index(),

src/citron/uisettings.cpp

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: 2016 Citra Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <QSettings>
@@ -47,6 +48,8 @@ u32 CalculateWidth(u32 height, Settings::AspectRatio ratio) {
         return height * 21 / 9;
     case Settings::AspectRatio::R16_10:
         return height * 16 / 10;
+    case Settings::AspectRatio::R32_9:
+        return height * 32 / 9;
     case Settings::AspectRatio::R16_9:
     case Settings::AspectRatio::Stretch:
         // TODO: Move this function wherever appropriate to implement Stretched aspect

src/common/settings_enums.h

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -149,7 +150,7 @@ ENUM(ScalingFilter, NearestNeighbor, Bilinear, Bicubic, Gaussian, ScaleForce, Fs
 
 ENUM(AntiAliasing, None, Fxaa, Smaa, MaxEnum);
 
-ENUM(AspectRatio, R16_9, R4_3, R21_9, R16_10, Stretch);
+ENUM(AspectRatio, R16_9, R4_3, R21_9, R16_10, R32_9, Stretch);
 
 ENUM(ConsoleMode, Handheld, Docked);
 

src/core/frontend/framebuffer_layout.cpp

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cmath>
@@ -70,6 +71,8 @@ float EmulationAspectRatio(AspectRatio aspect, float window_aspect_ratio) {
         return 9.0f / 21.0f;
     case AspectRatio::R16_10:
         return 10.0f / 16.0f;
+    case AspectRatio::R32_9:
+        return 9.0f / 32.0f;
     case AspectRatio::StretchToWindow:
         return window_aspect_ratio;
     default:

src/core/frontend/framebuffer_layout.h

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -28,6 +29,7 @@ enum class AspectRatio {
     R4_3,
     R21_9,
     R16_10,
+    R32_9,
     StretchToWindow,
 };