Android: Add video backend choice to settings

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/settings/SettingsAdapter.java

@@ -14,6 +14,7 @@ import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.model.settings.BooleanSetting;
 import org.dolphinemu.dolphinemu.model.settings.FloatSetting;
 import org.dolphinemu.dolphinemu.model.settings.IntSetting;
+import org.dolphinemu.dolphinemu.model.settings.StringSetting;
 import org.dolphinemu.dolphinemu.model.settings.view.CheckBoxSetting;
 import org.dolphinemu.dolphinemu.model.settings.view.SettingsItem;
 import org.dolphinemu.dolphinemu.model.settings.view.SingleChoiceSetting;
@@ -207,7 +208,11 @@ public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolde
 			}
 			else
 			{
-				if (scSetting.getKey().equals(SettingsFile.KEY_XFB_METHOD))
+				if (scSetting.getKey().equals(SettingsFile.KEY_VIDEO_BACKEND_INDEX))
+				{
+					putVideoBackendSetting(which);
+				}
+				else if (scSetting.getKey().equals(SettingsFile.KEY_XFB_METHOD))
 				{
 					putXfbSetting(which);
 				}
@@ -318,6 +323,31 @@ public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolde
 		return -1;
 	}
 
+	public void putVideoBackendSetting(int which)
+	{
+		StringSetting gfxBackend = null;
+		switch (which)
+		{
+			case 0:
+				gfxBackend = new StringSetting(SettingsFile.KEY_VIDEO_BACKEND, SettingsFile.SECTION_CORE, "OGL");
+				break;
+
+			case 1:
+				gfxBackend = new StringSetting(SettingsFile.KEY_VIDEO_BACKEND, SettingsFile.SECTION_CORE, "Vulkan");
+				break;
+
+			case 2:
+				gfxBackend = new StringSetting(SettingsFile.KEY_VIDEO_BACKEND, SettingsFile.SECTION_CORE, "SW");
+				break;
+
+			case 3:
+				gfxBackend = new StringSetting(SettingsFile.KEY_VIDEO_BACKEND, SettingsFile.SECTION_CORE, "Null");
+				break;
+		}
+
+		mView.putSetting(gfxBackend);
+	}
+
 	public void putXfbSetting(int which)
 	{
 		BooleanSetting xfbEnable = null;

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/settings/SettingsFragmentPresenter.java

@@ -5,6 +5,7 @@ import org.dolphinemu.dolphinemu.model.settings.BooleanSetting;
 import org.dolphinemu.dolphinemu.model.settings.IntSetting;
 import org.dolphinemu.dolphinemu.model.settings.Setting;
 import org.dolphinemu.dolphinemu.model.settings.SettingSection;
+import org.dolphinemu.dolphinemu.model.settings.StringSetting;
 import org.dolphinemu.dolphinemu.model.settings.view.CheckBoxSetting;
 import org.dolphinemu.dolphinemu.model.settings.view.HeaderSetting;
 import org.dolphinemu.dolphinemu.model.settings.view.SettingsItem;
@@ -137,6 +138,7 @@ public final class SettingsFragmentPresenter
 		Setting dualCore = null;
 		Setting overclockEnable = null;
 		Setting overclock = null;
+		IntSetting videoBackend = new IntSetting(SettingsFile.KEY_VIDEO_BACKEND_INDEX, SettingsFile.SECTION_CORE, getVideoBackendValue());
 		Setting continuousScan = null;
 		Setting wiimoteSpeaker = null;
 
@@ -162,6 +164,13 @@ public final class SettingsFragmentPresenter
 		sl.add(new CheckBoxSetting(SettingsFile.KEY_DUAL_CORE, SettingsFile.SECTION_CORE, R.string.dual_core, R.string.dual_core_descrip, true, dualCore));
 		sl.add(new CheckBoxSetting(SettingsFile.KEY_OVERCLOCK_ENABLE, SettingsFile.SECTION_CORE, R.string.overclock_enable, R.string.overclock_enable_description, false, overclockEnable));
 		sl.add(new SliderSetting(SettingsFile.KEY_OVERCLOCK_PERCENT, SettingsFile.SECTION_CORE, R.string.overclock_title, 0, 400, "%", 100, overclock));
+
+		// While it doesn't seem appropriate to store the video backend with the CPU settings, the video
+		// backend is stored in the main INI, which can't be changed by the graphics settings page, so
+		// we have to put it here.
+		sl.add(new SingleChoiceSetting(SettingsFile.KEY_VIDEO_BACKEND_INDEX, SettingsFile.SECTION_CORE, R.string.video_backend, R.string.video_backend_descrip,
+		       R.array.videoBackendEntries, R.array.videoBackendValues, 0, videoBackend));
+
 		sl.add(new CheckBoxSetting(SettingsFile.KEY_WIIMOTE_SCAN, SettingsFile.SECTION_CORE, R.string.wiimote_scanning, R.string.wiimote_scanning_description, true, continuousScan));
 		sl.add(new CheckBoxSetting(SettingsFile.KEY_WIIMOTE_SPEAKER, SettingsFile.SECTION_CORE, R.string.wiimote_speaker, R.string.wiimote_speaker_description, true, wiimoteSpeaker));
 	}
@@ -291,6 +300,32 @@ public final class SettingsFragmentPresenter
 		sl.add(new CheckBoxSetting(SettingsFile.KEY_GCADAPTER_BONGOS + gcPadNumber, SettingsFile.SECTION_CORE, R.string.gc_adapter_bongos, R.string.gc_adapter_bongos_description, false, bongos));
 	}
 
+	private int getVideoBackendValue()
+	{
+		int videoBackendValue;
+
+		try
+		{
+			String videoBackend = ((StringSetting)mSettings.get(SettingsFile.SECTION_CORE).getSetting(SettingsFile.KEY_VIDEO_BACKEND)).getValue();
+			if (videoBackend.equals("OGL"))
+				videoBackendValue = 0;
+			else if (videoBackend.equals("Vulkan"))
+				videoBackendValue = 1;
+			else if (videoBackend.equals("Software"))
+				videoBackendValue = 2;
+			else if (videoBackend.equals("Null"))
+				videoBackendValue = 3;
+			else
+				videoBackendValue = 0;
+		}
+		catch (NullPointerException ex)
+		{
+			videoBackendValue = 0;
+		}
+
+		return videoBackendValue;
+	}
+
 	private int getXfbValue()
 	{
 		int xfbValue;

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/SettingsFile.java

@@ -86,6 +86,7 @@ public final class SettingsFile
 	public static final String KEY_WIIMOTE_SPEAKER = "WiimoteEnableSpeaker";
 
 	// Internal only, not actually found in settings file.
+	public static final String KEY_VIDEO_BACKEND_INDEX = "VideoBackendIndex";
 	public static final String KEY_XFB_METHOD = "XFBMethod";
 
 	private SettingsFile()

Source/Android/app/src/main/res/values/arrays.xml

@@ -12,6 +12,20 @@
         <item>5</item>
     </integer-array>
 
+    <!-- Video backend selection -->
+    <string-array name="videoBackendEntries" translatable="false">
+        <item>OpenGL</item>
+        <item>Vulkan</item>
+        <item>Software</item>
+        <item>Null</item>
+    </string-array>
+    <integer-array name="videoBackendValues" translatable="false">
+        <item>0</item>
+        <item>1</item>
+        <item>2</item>
+        <item>3</item>
+    </integer-array>
+
     <!-- Wiimote extensions -->
     <string-array name="wiimoteExtEntries" translatable="false">
         <item>"None"</item>

Source/Android/app/src/main/res/values/strings.xml

@@ -263,7 +263,7 @@
     <string name="opengl_es3">OpenGL ES</string>
     <string name="opengl">OpenGL</string>
     <string name="video_backend">Video Backend</string>
-    <string name="video_backend_desc">%s</string>
+    <string name="video_backend_descrip">Select the API used for graphics rendering.</string>
     <string name="show_fps">Show FPS</string>
     <string name="show_fps_descrip">Show the number of frames rendered per second as a measure of emulation speed.</string>