cover the license

app/build.gradle.kts

@@ -318,6 +318,7 @@ android {
     buildFeatures {
         compose = true
         buildConfig = true
+        prefab = true
     }
     packaging {
         resources {
@@ -359,6 +360,7 @@ dependencies {
     implementation ("androidx.activity:activity-ktx:1.13.0")
     implementation ("androidx.appcompat:appcompat:1.8.0")
     implementation ("androidx.documentfile:documentfile:1.1.0")
+    implementation ("androidx.games:games-frame-pacing:2.1.3")
 
     implementation ("com.squareup.okio:okio:3.18.2")
     implementation ("com.squareup.okhttp3:okhttp:5.5.0")

app/src/main/cpp/CMakeLists.txt

@@ -2,7 +2,9 @@ cmake_minimum_required(VERSION 3.21)
 
 project(launcherfix)
 
-add_library(launcherfix SHARED launcher-fix.cpp patcher.cpp)
+find_package(games-frame-pacing REQUIRED CONFIG)
+
+add_library(launcherfix SHARED launcher-fix.cpp patcher.cpp pacing.cpp)
 
 target_compile_features(launcherfix PUBLIC cxx_std_20)
 set_target_properties(launcherfix PROPERTIES CXX_EXTENSIONS OFF)
@@ -14,4 +16,5 @@ set_target_properties(launcherfix PROPERTIES
     CXX_VISIBILITY_PRESET hidden
 )
 
-target_link_libraries(launcherfix PRIVATE log)
+target_link_libraries(launcherfix PRIVATE log android)
+target_link_libraries(launcherfix PRIVATE games-frame-pacing::swappy_static)

app/src/main/cpp/pacing.cpp

@@ -0,0 +1,65 @@
+#include <swappy/swappyGL.h>
+#include <swappy/swappyGL_extra.h>
+#include <android/native_window_jni.h>
+#include <memory>
+
+extern "C"
+JNIEXPORT void JNICALL Java_com_geode_launcher_LauncherFix_initFramePacing(
+        JNIEnv *env,
+        jobject,
+        jobject activity
+) {
+    SwappyGL_init(env, activity);
+}
+
+struct NativeWindowDeleter {
+    void operator()(ANativeWindow* p) const {
+        if (p != nullptr) ANativeWindow_release(p);
+    }
+};
+
+std::unique_ptr<ANativeWindow, NativeWindowDeleter> native_window = nullptr;
+
+extern "C"
+JNIEXPORT void JNICALL Java_com_geode_launcher_LauncherFix_destroyFramePacing(JNIEnv*, jobject) {
+    SwappyGL_destroy();
+}
+
+extern "C"
+JNIEXPORT jboolean JNICALL Java_com_geode_launcher_LauncherFix_swapFrame(
+        JNIEnv*,
+        jobject,
+        jlong display,
+        jlong surface
+) {
+    return SwappyGL_swap(
+            reinterpret_cast<EGLDisplay>(display),
+            reinterpret_cast<EGLSurface>(surface)
+    );
+}
+
+extern "C"
+JNIEXPORT void JNICALL Java_com_geode_launcher_LauncherFix_setSurface(
+        JNIEnv* env,
+        jobject,
+        jobject surface
+) {
+    if (surface == nullptr) {
+        native_window.reset();
+        SwappyGL_setWindow(nullptr);
+        return;
+    }
+
+    native_window.reset(ANativeWindow_fromSurface(env, surface));
+    SwappyGL_setWindow(native_window.get());
+}
+
+extern "C"
+JNIEXPORT void JNICALL Java_com_geode_launcher_LauncherFix_setSwapInterval(
+        JNIEnv* env,
+        jobject,
+        jlong interval_ns
+) {
+    SwappyGL_setAutoSwapInterval(false);
+    SwappyGL_setSwapIntervalNS(interval_ns);
+}

app/src/main/java/com/geode/launcher/GeometryDashActivity.kt

@@ -5,7 +5,9 @@ import android.content.Intent
 import android.content.pm.ActivityInfo
 import android.content.pm.ApplicationInfo
 import android.content.pm.PackageInfo
-import android.opengl.GLSurfaceView
+import android.opengl.EGL14
+import android.opengl.EGLConfig
+import android.opengl.EGLDisplay
 import android.os.Build
 import android.os.Bundle
 import android.os.Environment
@@ -43,9 +45,6 @@ import java.io.File
 import java.io.FileInputStream
 import java.io.FileOutputStream
 import java.io.IOException
-import javax.microedition.khronos.egl.EGL10
-import javax.microedition.khronos.egl.EGLConfig
-import javax.microedition.khronos.egl.EGLDisplay
 
 enum class DisplayMode {
     DEFAULT, LIMITED, FULLSCREEN;
@@ -78,6 +77,7 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
     private var mAspectRatio = 0.0f
     private var mScreenZoom = 1.0f
     private var mScreenZoomFit = false
+    private var mNativeFramePacing = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
         setupUIState()
@@ -131,6 +131,10 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
             }
         })
         mGLSurfaceView?.manualBackEvents = true
+
+        if (mNativeFramePacing) {
+            LauncherFix.initFramePacing(this)
+        }
     }
 
     private fun createVersionFile() {
@@ -491,9 +495,11 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
 
         val frameRate = mLimitedRefreshRate
         if (frameRate != null) {
-            renderer.limitFrameRate(frameRate)
+            glSurfaceView.setMaxFrameRate(frameRate)
         }
 
+        glSurfaceView.nativeFramePacing = mNativeFramePacing
+
         editText.inputType = InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS
         glSurfaceView.cocos2dxEditText = editText
 
@@ -529,6 +535,8 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
             }
         }
 
+        mNativeFramePacing = preferenceUtils.getBoolean(PreferenceUtils.Key.NATIVE_FRAME_PACING)
+
         if (displayMode == DisplayMode.FULLSCREEN && Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
             window.attributes.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
             GeodeUtils.handleSafeArea = true
@@ -562,6 +570,10 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
     override fun onDestroy() {
         super.onDestroy()
         FMOD.close()
+
+        if (mNativeFramePacing) {
+            LauncherFix.destroyFramePacing()
+        }
     }
 
     private fun resumeGame() {
@@ -733,11 +745,7 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
         }
     }
 
-    class EGLConfigChooser : GLSurfaceView.EGLConfigChooser {
-        // this comes from EGL14, but is unavailable on EGL10
-        // also EGL14 is incompatible with EGL10. so whatever
-        private var EGL_OPENGL_ES2_BIT: Int = 0x04
-
+    class EGLConfigChooser : ExplicitGLSurfaceView.EGLConfigChooser {
         private data class ConfigValues(
             val redSize: Int,
             val greenSize: Int,
@@ -747,29 +755,29 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
             val stencilSize: Int,
         )
 
-        private fun getAttribValue(egl: EGL10, display: EGLDisplay, config: EGLConfig, attrib: Int): Int {
+        private fun getAttribValue(display: EGLDisplay, config: EGLConfig, attrib: Int): Int {
             val value = IntArray(1)
-            egl.eglGetConfigAttrib(display, config, attrib, value)
+            EGL14.eglGetConfigAttrib(display, config, attrib, value, 0)
 
             return value[0]
         }
 
-        private fun testConfig(egl: EGL10, display: EGLDisplay, attrib: ConfigValues): EGLConfig? {
+        private fun testConfig(display: EGLDisplay, attrib: ConfigValues): EGLConfig? {
             val attribList = intArrayOf(
-                EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
-                EGL10.EGL_RED_SIZE, attrib.redSize,
-                EGL10.EGL_GREEN_SIZE, attrib.greenSize,
-                EGL10.EGL_BLUE_SIZE, attrib.blueSize,
-                EGL10.EGL_ALPHA_SIZE, attrib.alphaSize,
-                EGL10.EGL_DEPTH_SIZE, attrib.depthSize,
-                EGL10.EGL_STENCIL_SIZE, attrib.stencilSize,
-                EGL10.EGL_NONE
+                EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT,
+                EGL14.EGL_RED_SIZE, attrib.redSize,
+                EGL14.EGL_GREEN_SIZE, attrib.greenSize,
+                EGL14.EGL_BLUE_SIZE, attrib.blueSize,
+                EGL14.EGL_ALPHA_SIZE, attrib.alphaSize,
+                EGL14.EGL_DEPTH_SIZE, attrib.depthSize,
+                EGL14.EGL_STENCIL_SIZE, attrib.stencilSize,
+                EGL14.EGL_NONE
             )
 
             val configs = arrayOfNulls<EGLConfig>(1)
             val numConfigs = IntArray(1)
 
-            val res = egl.eglChooseConfig(display, attribList, configs, configs.size, numConfigs)
+            val res = EGL14.eglChooseConfig(display, attribList, 0, configs, 0, configs.size, numConfigs, 0)
             if (res && numConfigs[0] > 0 && configs[0] != null) {
                 return configs[0]
             }
@@ -777,18 +785,18 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
             return null
         }
 
-        private fun printConfig(egl: EGL10, display: EGLDisplay, config: EGLConfig) {
-            val id = getAttribValue(egl, display, config, EGL10.EGL_CONFIG_ID)
-            val red = getAttribValue(egl, display, config, EGL10.EGL_RED_SIZE)
-            val green = getAttribValue(egl, display, config, EGL10.EGL_GREEN_SIZE)
-            val blue = getAttribValue(egl, display, config, EGL10.EGL_BLUE_SIZE)
-            val alpha = getAttribValue(egl, display, config, EGL10.EGL_ALPHA_SIZE)
-            val depth = getAttribValue(egl, display, config, EGL10.EGL_DEPTH_SIZE)
-            val stencil = getAttribValue(egl, display, config, EGL10.EGL_STENCIL_SIZE)
+        private fun printConfig(display: EGLDisplay, config: EGLConfig) {
+            val id = getAttribValue(display, config, EGL14.EGL_CONFIG_ID)
+            val red = getAttribValue(display, config, EGL14.EGL_RED_SIZE)
+            val green = getAttribValue(display, config, EGL14.EGL_GREEN_SIZE)
+            val blue = getAttribValue(display, config, EGL14.EGL_BLUE_SIZE)
+            val alpha = getAttribValue(display, config, EGL14.EGL_ALPHA_SIZE)
+            val depth = getAttribValue(display, config, EGL14.EGL_DEPTH_SIZE)
+            val stencil = getAttribValue(display, config, EGL14.EGL_STENCIL_SIZE)
             println("EGLConfig $id: (red = $red, green = $green, blue = $blue, alpha = $alpha, depth = $depth, stencil = $stencil)")
         }
 
-        override fun chooseConfig(egl: EGL10, display: EGLDisplay): EGLConfig {
+        override fun chooseConfig(display: EGLDisplay): EGLConfig {
             val configs = listOf(
                 ConfigValues(8, 8, 8, 8, 16, 8),
                 ConfigValues(8, 8, 8, 0, 16, 8),
@@ -797,9 +805,9 @@ class GeometryDashActivity : AppCompatActivity(), Cocos2dxHelper.Cocos2dxHelperL
             )
 
             return configs.firstNotNullOf {
-                val config = testConfig(egl, display, it)
+                val config = testConfig(display, it)
                 if (config != null) {
-                    printConfig(egl, display, config)
+                    printConfig(display, config)
                 }
 
                 config

app/src/main/java/com/geode/launcher/LauncherFix.kt

@@ -1,5 +1,7 @@
 package com.geode.launcher
 
+import android.app.Activity
+import android.view.Surface
 import androidx.annotation.Keep
 import com.geode.launcher.utils.Constants
 
@@ -16,4 +18,10 @@ object LauncherFix {
     external fun enableExceptionsRenaming()
 
     external fun performPatches()
+
+    external fun initFramePacing(activity: Activity)
+    external fun destroyFramePacing()
+    external fun swapFrame(display: Long, surface: Long): Boolean
+    external fun setSurface(surface: Surface?)
+    external fun setSwapInterval(intervalNs: Long)
 }

app/src/main/java/com/geode/launcher/preferences/DeveloperSettingsActivity.kt

@@ -169,6 +169,12 @@ fun DeveloperSettingsScreen(onBackPressedDispatcher: OnBackPressedDispatcher?) {
                         }
                     )
 
+                    SettingsCard(
+                        title = stringResource(R.string.preference_native_pacing),
+                        description = stringResource(R.string.preference_native_pacing_description),
+                        preferenceKey = PreferenceUtils.Key.NATIVE_FRAME_PACING,
+                    )
+
                     /*
                     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                         SettingsCard(

app/src/main/java/com/geode/launcher/utils/PreferenceUtils.kt

@@ -150,6 +150,7 @@ class PreferenceUtils(private val sharedPreferences: SharedPreferences) {
         LAST_LAUNCHER_UPDATE,
         DISABLE_UPDATE_CACHE,
         PREBUNDLED_GEODE_MIGRATION_PERFORMED,
+        NATIVE_FRAME_PACING,
     }
 
     private fun defaultValueForBooleanKey(key: Key): Boolean {
@@ -201,6 +202,7 @@ class PreferenceUtils(private val sharedPreferences: SharedPreferences) {
             Key.LAST_LAUNCHER_UPDATE -> "PreferenceLastLauncherUpdate"
             Key.DISABLE_UPDATE_CACHE -> "PreferenceDisableUpdateCache"
             Key.PREBUNDLED_GEODE_MIGRATION_PERFORMED -> "PreferencePrebundledGeodeMigrationPerformed"
+            Key.NATIVE_FRAME_PACING -> "PreferenceNativeFramePacing"
             // Key.RELEASE_CHANNEL -> "PreferenceReleaseChannel"
             // Key.LAST_DISMISSED_UPDATE -> "PreferenceLastDismissedUpdate"
             // Key.FORCE_HRR -> "PreferenceForceHighRefreshRate"

app/src/main/java/org/cocos2dx/lib/Cocos2dxGLSurfaceView.kt

@@ -17,15 +17,18 @@ import android.view.inputmethod.InputMethodManager
 import androidx.annotation.RequiresApi
 import androidx.appcompat.widget.AppCompatEditText
 import com.customRobTop.BaseRobTopActivity
+import com.geode.launcher.ExplicitGLSurfaceView
+import com.geode.launcher.LauncherFix
 import com.geode.launcher.utils.GeodeUtils
 import kotlin.math.abs
+import kotlin.math.roundToLong
 
 private const val HANDLER_OPEN_IME_KEYBOARD = 2
 private const val HANDLER_CLOSE_IME_KEYBOARD = 3
 private const val MS_TO_NS = 1_000_000
 private const val SEC_TO_NS = 1_000_000_000.0
 
-class Cocos2dxGLSurfaceView(context: Context) : GLSurfaceView(context) {
+class Cocos2dxGLSurfaceView(context: Context) : ExplicitGLSurfaceView(context) {
     companion object {
         lateinit var cocos2dxGLSurfaceView: Cocos2dxGLSurfaceView
         private lateinit var handler: Handler
@@ -64,6 +67,7 @@ class Cocos2dxGLSurfaceView(context: Context) : GLSurfaceView(context) {
     var controllerEventsEnabled = false
         private set
     var supportsResizeEvents = false
+    var saveNativeFramePacing = false
 
     var cocos2dxEditText: AppCompatEditText? = null
         set(value) {
@@ -139,6 +143,10 @@ class Cocos2dxGLSurfaceView(context: Context) : GLSurfaceView(context) {
 
         println("updateRefreshRate: selecting refresh rate of ${chosenDisplay.refreshRate} (display ${chosenDisplay.modeId})")
 
+        if (saveNativeFramePacing) {
+            LauncherFix.setSwapInterval((1_000_000_000L / chosenRefreshRate).roundToLong())
+        }
+
         holder.surface.setFrameRate(chosenRefreshRate, Surface.FRAME_RATE_COMPATIBILITY_DEFAULT)
         if (isAttachedToWindow) {
             (context as Activity).window.attributes.preferredRefreshRate = chosenRefreshRate
@@ -153,6 +161,7 @@ class Cocos2dxGLSurfaceView(context: Context) : GLSurfaceView(context) {
 
     override fun onResume() {
         super.onResume()
+
         renderMode = RENDERMODE_CONTINUOUSLY
         queueEvent { cocos2dxRenderer.handleOnResume() }
     }
@@ -533,6 +542,11 @@ class Cocos2dxGLSurfaceView(context: Context) : GLSurfaceView(context) {
         setRenderer(this.cocos2dxRenderer)
     }
 
+    override fun setNativeFramePacing(nativeFramePacing: Boolean) {
+        super.setNativeFramePacing(nativeFramePacing)
+        saveNativeFramePacing = nativeFramePacing
+    }
+
     private fun getContentText(): String {
         return cocos2dxRenderer.getContentText()
     }
@@ -567,6 +581,10 @@ class Cocos2dxGLSurfaceView(context: Context) : GLSurfaceView(context) {
         inputManager.unregisterInputDeviceListener(InputListener)
     }
 
+    fun setMaxFrameRate(rate: Int) {
+        cocos2dxRenderer.limitFrameRate(rate)
+    }
+
     object InputListener : InputManager.InputDeviceListener {
         override fun onInputDeviceAdded(deviceId: Int) {
             GeodeUtils.inputDeviceAdded(deviceId)

app/src/main/java/org/cocos2dx/lib/Cocos2dxRenderer.kt

@@ -1,15 +1,14 @@
 package org.cocos2dx.lib
 
-import android.opengl.GLSurfaceView
+import android.opengl.EGLConfig
 import android.os.Build
-import javax.microedition.khronos.egl.EGLConfig
-import javax.microedition.khronos.opengles.GL10
+import com.geode.launcher.ExplicitGLSurfaceView
 
 private const val NANOSECONDS_PER_SECOND = 1000000000L
 private const val NANOSECONDS_PER_MICROSECOND = 1000000L
 
 @Suppress("unused", "KotlinJniMissingFunction")
-class Cocos2dxRenderer(private var handler: Cocos2dxGLSurfaceView) : GLSurfaceView.Renderer {
+class Cocos2dxRenderer(private var handler: Cocos2dxGLSurfaceView) : ExplicitGLSurfaceView.Renderer {
     companion object {
         @JvmStatic
         fun setAnimationInterval(@Suppress("UNUSED_PARAMETER") animationInterval: Double) {
@@ -80,12 +79,12 @@ class Cocos2dxRenderer(private var handler: Cocos2dxGLSurfaceView) : GLSurfaceVi
         screenHeight = surfaceHeight
     }
 
-    override fun onSurfaceCreated(gl10: GL10?, eglConfig: EGLConfig?) {
+    override fun onSurfaceCreated(eglConfig: EGLConfig?) {
         nativeInit(screenWidth, screenHeight)
         lastTickInNanoSeconds = System.nanoTime()
     }
 
-    override fun onSurfaceChanged(gl10: GL10?, width: Int, height: Int) {
+    override fun onSurfaceChanged(width: Int, height: Int) {
         if (setFrameRate && Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
             handler.updateRefreshRate()
         }
@@ -93,7 +92,7 @@ class Cocos2dxRenderer(private var handler: Cocos2dxGLSurfaceView) : GLSurfaceVi
         println("renderer surfaceChanged: ${width}x${height}@${handler.display.refreshRate}fps")
     }
 
-    override fun onDrawFrame(gl: GL10?) {
+    override fun onDrawFrame() {
         val animationInterval = mAnimationInterval
         if (animationInterval == null) {
             nativeRender()

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

@@ -298,6 +298,9 @@
     <string name="preference_profiles_delete_alt">Delete</string>
     <string name="preference_profiles_delete_undo_alt">Undo</string>
 
+    <string name="preference_native_pacing">Native frame pacing</string>
+    <string name="preference_native_pacing_description">Reduces latency, but may worsen frame drops.</string>
+
     <!-- ApplicationLogsActivity strings -->
     <string name="title_activity_application_logs">Application logs</string>
     <string name="application_logs_no_logs">No logs available.</string>