[android] Legacy build flavor (#51)

This adds a "legacy" build flavor, similar to the genshinSpoof flavor. The legacy flavor uses a white icon bg, alongside building with `YUZU_LEGACY=ON`, which applies the previously-made SD865 patches iff that value is truthy.

Co-authored-by: Bixthefin <114880614+Bixthefin@users.noreply.github.com>
Co-authored-by: Calchan <denis.dupeyron@gmail.com>
Co-authored-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/51
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: Bix <bix@bixed.xyz>
Co-committed-by: Bix <bix@bixed.xyz>

11 files changed, 135 insertions, 35 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f192887f7..f436c0a183 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -227,6 +227,8 @@ endif()
 # TODO(crueter): CI this?
 option(YUZU_DOWNLOAD_ANDROID_VVL "Download validation layer binary for android" ON)
 
+option(YUZU_LEGACY "Apply patches that improve compatibility with older GPUs (e.g. Snapdragon 865) at the cost of performance" OFF)
+
 cmake_dependent_option(YUZU_ROOM "Enable dedicated room functionality" ON "NOT ANDROID" OFF)
 cmake_dependent_option(YUZU_ROOM_STANDALONE "Enable standalone room executable" ON "YUZU_ROOM" OFF)
 
@@ -324,6 +326,11 @@ if (UNIX)
     add_compile_definitions(YUZU_UNIX=1)
 endif()
 
+if (YUZU_LEGACY)
+    message(WARNING "Making legacy build. Performance may suffer.")
+    add_compile_definitions(YUZU_LEGACY)
+endif()
+
 if (ARCHITECTURE_arm64 AND (ANDROID OR PLATFORM_LINUX))
     set(HAS_NCE 1)
     add_compile_definitions(HAS_NCE=1)
diff --git a/src/android/app/build.gradle.kts b/src/android/app/build.gradle.kts
index e8d8141711..c85da039cb 100644
--- a/src/android/app/build.gradle.kts
+++ b/src/android/app/build.gradle.kts
@@ -57,8 +57,8 @@ android {
     }
 
     defaultConfig {
-        // TODO If this is ever modified, change application_id in strings.xml
         applicationId = "dev.eden.eden_emulator"
+
         minSdk = 28
         targetSdk = 36
         versionName = getGitVersion()
@@ -72,8 +72,30 @@ android {
 
         buildConfigField("String", "GIT_HASH", "\"${getGitHash()}\"")
         buildConfigField("String", "BRANCH", "\"${getBranch()}\"")
+
+        externalNativeBuild {
+            cmake {
+                arguments.addAll(listOf(
+                    "-DENABLE_QT=0", // Don't use QT
+                    "-DENABLE_SDL2=0", // Don't use SDL
+                    "-DENABLE_WEB_SERVICE=1", // Enable web service
+                    "-DENABLE_OPENSSL=ON",
+                    "-DANDROID_ARM_NEON=true", // cryptopp requires Neon to work
+                    "-DYUZU_USE_CPM=ON",
+                    "-DCPMUTIL_FORCE_BUNDLED=ON",
+                    "-DYUZU_USE_BUNDLED_FFMPEG=ON",
+                    "-DCMAKE_EXPORT_COMPILE_COMMANDS=ON",
+                    "-DBUILD_TESTING=OFF",
+                    "-DYUZU_TESTS=OFF",
+                    "-DDYNARMIC_TESTS=OFF"
+                ))
+
+                abiFilters("arm64-v8a")
+            }
+        }
     }
 
+
     val keystoreFile = System.getenv("ANDROID_KEYSTORE_FILE")
     signingConfigs {
         if (keystoreFile != null) {
@@ -94,7 +116,6 @@ android {
 
     // Define build types, which are orthogonal to product flavors.
     buildTypes {
-
         // Signed by release key, allowing for upload to Play Store.
         release {
             signingConfig = if (keystoreFile != null) {
@@ -103,7 +124,6 @@ android {
                 signingConfigs.getByName("default")
             }
 
-            resValue("string", "app_name_suffixed", "Eden")
             isMinifyEnabled = true
             isDebuggable = false
             proguardFiles(
@@ -116,7 +136,6 @@ android {
         // Attaches 'debug' suffix to version and package name, allowing installation alongside the release build.
         register("relWithDebInfo") {
             isDefault = true
-            resValue("string", "app_name_suffixed", "Eden Debug Release")
             signingConfig = signingConfigs.getByName("default")
             isDebuggable = true
             proguardFiles(
@@ -132,7 +151,6 @@ android {
         // Attaches 'debug' suffix to version and package name, allowing installation alongside the release build.
         debug {
             signingConfig = signingConfigs.getByName("default")
-            resValue("string", "app_name_suffixed", "Eden Debug")
             isDebuggable = true
             isJniDebuggable = true
             versionNameSuffix = "-debug"
@@ -140,19 +158,62 @@ android {
         }
     }
 
+        // this is really annoying but idk any other ways to fix this behavior
+    applicationVariants.all {
+        val variant = this
+        when {
+            variant.flavorName == "legacy" && variant.buildType.name == "debug" -> {
+                variant.resValue("string", "app_name_suffixed", "Eden Legacy Debug")
+            }
+            variant.flavorName == "mainline" && variant.buildType.name == "debug" -> {
+                variant.resValue("string", "app_name_suffixed", "Eden Debug")
+            }
+            variant.flavorName == "genshinSpoof" && variant.buildType.name == "debug" -> {
+                variant.resValue("string", "app_name_suffixed", "Eden Optimized Debug")
+            }
+            variant.flavorName == "legacy" && variant.buildType.name == "relWithDebInfo" -> {
+                variant.resValue("string", "app_name_suffixed", "Eden Legacy Debug Release")
+            }
+            variant.flavorName == "mainline" && variant.buildType.name == "relWithDebInfo" -> {
+                variant.resValue("string", "app_name_suffixed", "Eden Debug Release")
+            }
+            variant.flavorName == "genshinSpoof" && variant.buildType.name == "relWithDebInfo" -> {
+                variant.resValue("string", "app_name_suffixed", "Eden Optimized Debug Release")
+            }
+        }
+    }
+
     android {
         flavorDimensions.add("version")
         productFlavors {
             create("mainline") {
                 dimension = "version"
-                // No need to set applicationId here
+                resValue("string", "app_name_suffixed", "Eden")
             }
 
             create("genshinSpoof") {
                 dimension = "version"
-                resValue("string", "app_name_suffixed", "Eden Optimised")
+                resValue("string", "app_name_suffixed", "Eden Optimized")
                 applicationId = "com.miHoYo.Yuanshen"
             }
+
+            create("legacy") {
+                dimension = "version"
+                resValue("string", "app_name_suffixed", "Eden Legacy")
+                applicationId = "dev.legacy.eden_emulator"
+
+                externalNativeBuild {
+                    cmake {
+                        arguments.add("-DYUZU_LEGACY=ON")
+                    }
+                }
+
+                sourceSets {
+                    getByName("legacy") {
+                        res.srcDirs("src/main/legacy")
+                    }
+                }
+            }
         }
     }
 
@@ -162,29 +223,6 @@ android {
             path = file("../../../CMakeLists.txt")
         }
     }
-
-    defaultConfig {
-        externalNativeBuild {
-            cmake {
-                arguments(
-                    "-DENABLE_QT=0", // Don't use QT
-                    "-DENABLE_SDL2=0", // Don't use SDL
-                    "-DENABLE_WEB_SERVICE=1", // Enable web service
-                    "-DENABLE_OPENSSL=ON",
-                    "-DANDROID_ARM_NEON=true", // cryptopp requires Neon to work
-                    "-DYUZU_USE_CPM=ON",
-                    "-DCPMUTIL_FORCE_BUNDLED=ON",
-                    "-DYUZU_USE_BUNDLED_FFMPEG=ON",
-                    "-DCMAKE_EXPORT_COMPILE_COMMANDS=ON",
-                    "-DBUILD_TESTING=OFF",
-                    "-DYUZU_TESTS=OFF",
-                    "-DDYNARMIC_TESTS=OFF"
-                )
-
-                abiFilters("arm64-v8a")
-            }
-        }
-    }
 }
 
 tasks.register<Delete>("ktlintReset", fun Delete.() {
diff --git a/src/android/app/src/main/legacy/drawable/ic_icon_bg.png b/src/android/app/src/main/legacy/drawable/ic_icon_bg.png
new file mode 100644
index 0000000000..3327014f8f
--- /dev/null
+++ b/src/android/app/src/main/legacy/drawable/ic_icon_bg.png
diff --git a/src/android/app/src/main/legacy/drawable/ic_icon_bg_orig.png b/src/android/app/src/main/legacy/drawable/ic_icon_bg_orig.png
new file mode 100644
index 0000000000..a9fc55a4f5
--- /dev/null
+++ b/src/android/app/src/main/legacy/drawable/ic_icon_bg_orig.png
diff --git a/src/core/arm/nce/arm_nce.cpp b/src/core/arm/nce/arm_nce.cpp
index 877e8ac3c7..0e0d72fc8a 100644
--- a/src/core/arm/nce/arm_nce.cpp
+++ b/src/core/arm/nce/arm_nce.cpp
@@ -227,7 +227,7 @@ HaltReason ArmNce::RunThread(Kernel::KThread* thread) {
     if (auto it = post_handlers.find(m_guest_ctx.pc); it != post_handlers.end()) {
         hr = ReturnToRunCodeByTrampoline(thread_params, &m_guest_ctx, it->second);
     } else {
-        hr = ReturnToRunCodeByExceptionLevelChange(m_thread_id, thread_params);
+        hr = ReturnToRunCodeByExceptionLevelChange(m_thread_id, thread_params);  // Android: Use "process handle SIGUSR2 -n true -p true -s false" (and SIGURG) in LLDB when debugging
     }
 
     // Critical section for thread cleanup
diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index 6f6e0c23a8..5223afe937 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -26,7 +26,9 @@ BufferCache<P>::BufferCache(Tegra::MaxwellDeviceMemoryManager& device_memory_, R
     void(slot_buffers.insert(runtime, NullBufferParams{}));
     gpu_modified_ranges.Clear();
     inline_buffer_id = NULL_BUFFER_ID;
-
+#ifdef YUZU_LEGACY
+    immediately_free = (Settings::values.vram_usage_mode.GetValue() == Settings::VramUsageMode::Aggressive);
+#endif
     if (!runtime.CanReportMemoryUsage()) {
         minimum_memory = DEFAULT_EXPECTED_MEMORY;
         critical_memory = DEFAULT_CRITICAL_MEMORY;
@@ -1378,6 +1380,10 @@ void BufferCache<P>::JoinOverlap(BufferId new_buffer_id, BufferId overlap_id,
     });
     new_buffer.MarkUsage(copies[0].dst_offset, copies[0].size);
     runtime.CopyBuffer(new_buffer, overlap, copies, true);
+#ifdef YUZU_LEGACY
+    if (immediately_free)
+        runtime.Finish();
+#endif
     DeleteBuffer(overlap_id, true);
 }
 
@@ -1668,7 +1674,12 @@ void BufferCache<P>::DeleteBuffer(BufferId buffer_id, bool do_not_mark) {
     }
 
     Unregister(buffer_id);
-    delayed_destruction_ring.Push(std::move(slot_buffers[buffer_id]));
+
+#ifdef YUZU_LEGACY
+    if (!do_not_mark || !immediately_free)
+#endif
+        delayed_destruction_ring.Push(std::move(slot_buffers[buffer_id]));
+
     slot_buffers.erase(buffer_id);
 
     if constexpr (HAS_PERSISTENT_UNIFORM_BUFFER_BINDINGS) {
diff --git a/src/video_core/buffer_cache/buffer_cache_base.h b/src/video_core/buffer_cache/buffer_cache_base.h
index a45e9b35f1..486d19fb79 100644
--- a/src/video_core/buffer_cache/buffer_cache_base.h
+++ b/src/video_core/buffer_cache/buffer_cache_base.h
@@ -154,7 +154,11 @@ template <class P>
 class BufferCache : public VideoCommon::ChannelSetupCaches<BufferCacheChannelInfo> {
     // Page size for caching purposes.
     // This is unrelated to the CPU page size and it can be changed as it seems optimal.
+#ifdef YUZU_LEGACY
+    static constexpr u32 CACHING_PAGEBITS = 12;
+#else
     static constexpr u32 CACHING_PAGEBITS = 16;
+#endif
     static constexpr u64 CACHING_PAGESIZE = u64{1} << CACHING_PAGEBITS;
 
     static constexpr bool IS_OPENGL = P::IS_OPENGL;
@@ -168,9 +172,14 @@ class BufferCache : public VideoCommon::ChannelSetupCaches<BufferCacheChannelInf
     static constexpr bool SEPARATE_IMAGE_BUFFERS_BINDINGS = P::SEPARATE_IMAGE_BUFFER_BINDINGS;
     static constexpr bool USE_MEMORY_MAPS_FOR_UPLOADS = P::USE_MEMORY_MAPS_FOR_UPLOADS;
 
+#ifdef YUZU_LEGACY
+    static constexpr s64 TARGET_THRESHOLD = 3_GiB;
+#else
+    static constexpr s64 TARGET_THRESHOLD = 4_GiB;
+#endif
+
     static constexpr s64 DEFAULT_EXPECTED_MEMORY = 512_MiB;
     static constexpr s64 DEFAULT_CRITICAL_MEMORY = 1_GiB;
-    static constexpr s64 TARGET_THRESHOLD = 4_GiB;
 
     // Debug Flags.
 
@@ -446,7 +455,12 @@ private:
     Tegra::MaxwellDeviceMemoryManager& device_memory;
 
     Common::SlotVector<Buffer> slot_buffers;
-    DelayedDestructionRing<Buffer, 8> delayed_destruction_ring;
+#ifdef YUZU_LEGACY
+    static constexpr size_t TICKS_TO_DESTROY = 6;
+#else
+    static constexpr size_t TICKS_TO_DESTROY = 8;
+#endif
+    DelayedDestructionRing<Buffer, TICKS_TO_DESTROY> delayed_destruction_ring;
 
     const Tegra::Engines::DrawManager::IndirectParams* current_draw_indirect{};
 
@@ -478,6 +492,9 @@ private:
     u64 minimum_memory = 0;
     u64 critical_memory = 0;
     BufferId inline_buffer_id;
+#ifdef YUZU_LEGACY
+    bool immediately_free = false;
+#endif
 
     std::array<BufferId, ((1ULL << 34) >> CACHING_PAGEBITS)> page_table;
     Common::ScratchBuffer<u8> tmp_buffer;
diff --git a/src/video_core/host1x/host1x.cpp b/src/video_core/host1x/host1x.cpp
index 293bca6d79..cec5104144 100644
--- a/src/video_core/host1x/host1x.cpp
+++ b/src/video_core/host1x/host1x.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -18,9 +21,15 @@ Host1x::~Host1x() = default;
 void Host1x::StartDevice(s32 fd, ChannelType type, u32 syncpt) {
     switch (type) {
     case ChannelType::NvDec:
+#ifdef YUZU_LEGACY
+        std::call_once(nvdec_first_init, []() {std::this_thread::sleep_for(std::chrono::milliseconds{500});}); // HACK: For Astroneer
+#endif
         devices[fd] = std::make_unique<Tegra::Host1x::Nvdec>(*this, fd, syncpt, frame_queue);
         break;
     case ChannelType::VIC:
+#ifdef YUZU_LEGACY
+        std::call_once(vic_first_init, []() {std::this_thread::sleep_for(std::chrono::milliseconds{500});}); // HACK: For Astroneer
+#endif
         devices[fd] = std::make_unique<Tegra::Host1x::Vic>(*this, fd, syncpt, frame_queue);
         break;
     default:
diff --git a/src/video_core/host1x/host1x.h b/src/video_core/host1x/host1x.h
index 8debac93dd..4eea214ec6 100644
--- a/src/video_core/host1x/host1x.h
+++ b/src/video_core/host1x/host1x.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -201,6 +204,10 @@ private:
     std::unique_ptr<Common::FlatAllocator<u32, 0, 32>> allocator;
     FrameQueue frame_queue;
     std::unordered_map<s32, std::unique_ptr<CDmaPusher>> devices;
+#ifdef YUZU_LEGACY
+    std::once_flag nvdec_first_init;
+    std::once_flag vic_first_init;
+#endif
 };
 
 } // namespace Tegra::Host1x
diff --git a/src/video_core/texture_cache/texture_cache_base.h b/src/video_core/texture_cache/texture_cache_base.h
index f7d22afde2..01a9a6a3f1 100644
--- a/src/video_core/texture_cache/texture_cache_base.h
+++ b/src/video_core/texture_cache/texture_cache_base.h
@@ -110,7 +110,12 @@ class TextureCache : public VideoCommon::ChannelSetupCaches<TextureCacheChannelI
 
     static constexpr size_t UNSET_CHANNEL{(std::numeric_limits<size_t>::max)()};
 
+#ifdef YUZU_LEGACY
+    static constexpr s64 TARGET_THRESHOLD = 3_GiB;
+#else
     static constexpr s64 TARGET_THRESHOLD = 4_GiB;
+#endif
+
     static constexpr s64 DEFAULT_EXPECTED_MEMORY = 1_GiB + 125_MiB;
     static constexpr s64 DEFAULT_CRITICAL_MEMORY = 1_GiB + 625_MiB;
     static constexpr size_t GC_EMERGENCY_COUNTS = 2;
@@ -479,7 +484,11 @@ private:
     };
     Common::LeastRecentlyUsedCache<LRUItemParams> lru_cache;
 
+ #ifdef YUZU_LEGACY
+    static constexpr size_t TICKS_TO_DESTROY = 6;
+ #else
     static constexpr size_t TICKS_TO_DESTROY = 8;
+#endif
     DelayedDestructionRing<Image, TICKS_TO_DESTROY> sentenced_images;
     DelayedDestructionRing<ImageView, TICKS_TO_DESTROY> sentenced_image_view;
     DelayedDestructionRing<Framebuffer, TICKS_TO_DESTROY> sentenced_framebuffers;
diff --git a/src/video_core/vulkan_common/vulkan_memory_allocator.cpp b/src/video_core/vulkan_common/vulkan_memory_allocator.cpp
index f0309117bf..4cd3442d97 100644
--- a/src/video_core/vulkan_common/vulkan_memory_allocator.cpp
+++ b/src/video_core/vulkan_common/vulkan_memory_allocator.cpp
@@ -325,4 +325,6 @@ namespace Vulkan {
         return MemoryCommit(allocator, a, info);
     }
 
+
+
 } // namespace Vulkan