Prepare for Vulkan backend (#6595)

* externals: Add libraries required for vulkan

* build: Add support for downloading bundled MoltenVK.

* ci: Install tools needed for Vulkan.

* citra_qt: Add API status indicator

---------

Co-authored-by: GPUCode <geoster3d@gmail.com>

.ci/macos/deps.sh

@@ -1,3 +1,3 @@
 #!/bin/sh -ex
 
-brew install ccache ninja || true
+brew install ccache glslang ninja || true

.github/workflows/ci.yml

@@ -150,6 +150,14 @@ jobs:
         shell: bash
       - name: Set up MSVC
         uses: ilammy/msvc-dev-cmd@v1
+      - name: Setup Vulkan SDK
+        uses: humbletim/setup-vulkan-sdk@v1.2.0
+        with:
+          vulkan-query-version: latest
+          vulkan-components: Glslang
+          vulkan-use-cache: true
+      - name: Test glslangValidator
+        run: glslangValidator --version
       - name: Build
         run: ./.ci/windows-msvc/build.sh
         shell: bash
@@ -186,8 +194,9 @@ jobs:
           echo $GIT_TAG_NAME
       - name: Deps
         run: |
-          sudo apt-get update
-          sudo apt-get install ccache apksigner -y
+          sudo add-apt-repository -y ppa:theofficialgman/gpu-tools
+          sudo apt-get update -y
+          sudo apt-get install ccache glslang-dev glslang-tools apksigner -y
       - name: Build
         run: ./.ci/android/build.sh
       - name: Copy and sign artifacts

.gitmodules

@@ -64,6 +64,18 @@
 [submodule "dds-ktx"]
     path = externals/dds-ktx
     url = https://github.com/septag/dds-ktx
-[submodule "externals/openal-soft"]
-	path = externals/openal-soft
-	url = https://github.com/kcat/openal-soft
+[submodule "openal-soft"]
+    path = externals/openal-soft
+    url = https://github.com/kcat/openal-soft
+[submodule "glslang"]
+    path = externals/glslang
+    url = https://github.com/KhronosGroup/glslang
+[submodule "vma"]
+    path = externals/vma
+    url = https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator
+[submodule "vulkan-headers"]
+    path = externals/vulkan-headers
+    url = https://github.com/KhronosGroup/Vulkan-Headers
+[submodule "sirit"]
+    path = externals/sirit
+    url = https://github.com/yuzu-emu/sirit

CMakeLists.txt

@@ -59,6 +59,8 @@ option(USE_SYSTEM_BOOST "Use the system Boost libs (instead of the bundled ones)
 
 CMAKE_DEPENDENT_OPTION(ENABLE_FDK "Use FDK AAC decoder" OFF "NOT ENABLE_FFMPEG_AUDIO_DECODER;NOT ENABLE_MF" OFF)
 
+CMAKE_DEPENDENT_OPTION(CITRA_USE_BUNDLED_MOLTENVK "Download the bundled MoltenVK" ON "APPLE" OFF)
+
 CMAKE_DEPENDENT_OPTION(CITRA_BUNDLE_LIBRARIES "Bundle dependent libraries with the output executables" ON "APPLE" OFF)
 
 option(CITRA_WARNINGS_AS_ERRORS "Enable warnings as errors" ON)
@@ -282,10 +284,16 @@ find_package(tsl-robin-map QUIET)
 # ======================================
 
 if (APPLE)
+    if (CITRA_USE_BUNDLED_MOLTENVK)
+        download_moltenvk()
+    endif()
+    find_library(MOLTENVK_LIBRARY MoltenVK REQUIRED)
+    message(STATUS "Using MoltenVK at ${MOLTENVK_LIBRARY}.")
+
     # Umbrella framework for everything GUI-related
-    find_library(COCOA_LIBRARY Cocoa)
-    find_library(AVFOUNDATION_LIBRARY AVFoundation)
-    set(PLATFORM_LIBRARIES ${COCOA_LIBRARY} ${AVFOUNDATION_LIBRARY} ${IOKIT_LIBRARY} ${COREVIDEO_LIBRARY})
+    find_library(COCOA_LIBRARY Cocoa REQUIRED)
+    find_library(AVFOUNDATION_LIBRARY AVFoundation REQUIRED)
+    set(PLATFORM_LIBRARIES ${COCOA_LIBRARY} ${AVFOUNDATION_LIBRARY} ${MOLTENVK_LIBRARY})
 elseif (WIN32)
     set(PLATFORM_LIBRARIES winmm ws2_32)
     if (MINGW)

CMakeModules/DownloadExternals.cmake

@@ -100,6 +100,30 @@ function(download_qt_external target prefix_var)
     set(${prefix_var} "${prefix}" PARENT_SCOPE)
 endfunction()
 
+function(download_moltenvk)
+    if (IOS)
+        set(MOLTENVK_PLATFORM "iOS")
+    else()
+        set(MOLTENVK_PLATFORM "macOS")
+    endif()
+
+    set(MOLTENVK_DIR "${CMAKE_BINARY_DIR}/externals/MoltenVK")
+    set(MOLTENVK_TAR "${CMAKE_BINARY_DIR}/externals/MoltenVK.tar")
+    if (NOT EXISTS ${MOLTENVK_DIR})
+        if (NOT EXISTS ${MOLTENVK_TAR})
+            file(DOWNLOAD https://github.com/KhronosGroup/MoltenVK/releases/latest/download/MoltenVK-all.tar
+                ${MOLTENVK_TAR} SHOW_PROGRESS)
+        endif()
+
+        execute_process(COMMAND ${CMAKE_COMMAND} -E tar xf "${MOLTENVK_TAR}"
+            WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/externals")
+    endif()
+
+    # Add the MoltenVK library path to the prefix so find_library can locate it.
+    list(APPEND CMAKE_PREFIX_PATH "${MOLTENVK_DIR}/MoltenVK/dylib/${MOLTENVK_PLATFORM}")
+    set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} PARENT_SCOPE)
+endfunction()
+
 function(get_external_prefix lib_name prefix_var)
     set(${prefix_var} "${CMAKE_BINARY_DIR}/externals/${lib_name}" PARENT_SCOPE)
 endfunction()

dist/qt_themes/default/style.qss

@@ -1,3 +1,17 @@
+QPushButton#GraphicsAPIStatusBarButton {
+    color: #656565;
+    border: 1px solid transparent;
+    background-color: transparent;
+    padding: 0px 3px 0px 3px;
+    text-align: center;
+    min-width: 60px;
+    min-height: 20px;
+}
+
+QPushButton#GraphicsAPIStatusBarButton:hover {
+    border: 1px solid #76797C;
+}
+
 QPushButton#3DOptionStatusBarButton {
     color: #A5A5A5;
     font-weight: bold;

dist/qt_themes/qdarkstyle/style.qss

@@ -1,3 +1,31 @@
+QPushButton#TogglableStatusBarButton {
+    color: #959595;
+    border: 1px solid transparent;
+    background-color: transparent;
+    padding: 0px 3px 0px 3px;
+    text-align: center;
+}
+
+QPushButton#TogglableStatusBarButton:checked {
+    color: palette(text);
+}
+
+QPushButton#TogglableStatusBarButton:hover {
+    border: 1px solid #76797C;
+}
+
+QPushButton#GraphicsAPIStatusBarButton {
+    color: #656565;
+    border: 1px solid transparent;
+    background-color: transparent;
+    padding: 0px 3px 0px 3px;
+    text-align: center;
+}
+
+QPushButton#GraphicsAPIStatusBarButton:hover {
+    border: 1px solid #76797C;
+}
+
 QToolTip {
     border: 1px solid #76797C;
     background-color: #5A7566;

externals/CMakeLists.txt

@@ -93,6 +93,13 @@ endif()
 # Glad
 add_subdirectory(glad)
 
+# glslang
+set(SKIP_GLSLANG_INSTALL ON)
+set(ENABLE_GLSLANG_BINARIES OFF)
+set(ENABLE_SPVREMAPPER OFF)
+set(ENABLE_CTEST OFF)
+add_subdirectory(glslang)
+
 # inih
 add_subdirectory(inih)
 
@@ -106,16 +113,19 @@ target_include_directories(nihstro-headers INTERFACE ./nihstro/include)
 if (MSVC)
     target_compile_options(nihstro-headers INTERFACE /W0)
 endif()
+
 # Open Source Archives
 add_subdirectory(open_source_archives)
 
 # SoundTouch
-
 set(INTEGER_SAMPLES ON CACHE BOOL "")
 set(SOUNDSTRETCH OFF CACHE BOOL "")
 set(SOUNDTOUCH_DLL OFF CACHE BOOL "")
 add_subdirectory(soundtouch EXCLUDE_FROM_ALL)
 
+# sirit
+add_subdirectory(sirit EXCLUDE_FROM_ALL)
+
 # Teakra
 add_subdirectory(teakra EXCLUDE_FROM_ALL)
 
@@ -205,3 +215,11 @@ if (ENABLE_OPENAL)
     set(LIBTYPE "STATIC" CACHE STRING "")
     add_subdirectory(openal-soft EXCLUDE_FROM_ALL)
 endif()
+
+# VMA
+add_library(vma INTERFACE)
+target_include_directories(vma INTERFACE ./vma/include)
+
+# vulkan-headers
+add_library(vulkan-headers INTERFACE)
+target_include_directories(vulkan-headers INTERFACE ./vulkan-headers/include)

externals/glslang

@@ -0,0 +1 @@
+Subproject commit 1e4955adbcd9b3f5eaf2129e918ca057baed6520

externals/sirit

@@ -0,0 +1 @@
+Subproject commit 4ab79a8c023aa63caaa93848b09b9fe8b183b1a9

externals/vma

@@ -0,0 +1 @@
+Subproject commit 0e89587db3ebee4d463f191bd296374c5fafc8ea

externals/vulkan-headers

@@ -0,0 +1 @@
+Subproject commit bae9700cd9425541a0f6029957f005e5ad3ef660

src/citra_qt/CMakeLists.txt

@@ -289,7 +289,7 @@ create_target_directory_groups(citra-qt)
 
 target_link_libraries(citra-qt PRIVATE audio_core citra_common citra_core input_common network video_core)
 target_link_libraries(citra-qt PRIVATE Boost::boost glad nihstro-headers Qt6::Widgets Qt6::Multimedia Qt6::Concurrent)
-target_link_libraries(citra-qt PRIVATE ${PLATFORM_LIBRARIES} Threads::Threads)
+target_link_libraries(citra-qt PRIVATE ${PLATFORM_LIBRARIES} Threads::Threads vulkan-headers)
 
 if (NOT WIN32)
     target_include_directories(citra-qt PRIVATE ${Qt6Gui_PRIVATE_INCLUDE_DIRS})

src/citra_qt/main.cpp

@@ -358,6 +358,22 @@ void GMainWindow::InitializeWidgets() {
         statusBar()->addPermanentWidget(label);
     }
 
+    // Setup Graphics API button
+    graphics_api_button = new QPushButton();
+    graphics_api_button->setObjectName(QStringLiteral("GraphicsAPIStatusBarButton"));
+    graphics_api_button->setFocusPolicy(Qt::NoFocus);
+    UpdateAPIIndicator();
+
+    connect(graphics_api_button, &QPushButton::clicked, this, [this] {
+        if (emulation_running) {
+            return;
+        }
+
+        UpdateAPIIndicator(true);
+    });
+
+    statusBar()->insertPermanentWidget(0, graphics_api_button);
+
     statusBar()->addPermanentWidget(multiplayer_state->GetStatusText());
     statusBar()->addPermanentWidget(multiplayer_state->GetStatusIcon());
 
@@ -1990,6 +2006,7 @@ void GMainWindow::OnConfigure() {
         }
         UpdateSecondaryWindowVisibility();
         UpdateBootHomeMenuState();
+        UpdateAPIIndicator();
     } else {
         Settings::values.input_profiles = old_input_profiles;
         Settings::values.touch_from_button_maps = old_touch_from_button_maps;
@@ -2313,6 +2330,24 @@ void GMainWindow::ShowMouseCursor() {
     }
 }
 
+void GMainWindow::UpdateAPIIndicator(bool update) {
+    static std::array graphics_apis = {QStringLiteral("SOFTWARE"), QStringLiteral("OPENGL")};
+
+    static std::array graphics_api_colors = {QStringLiteral("#3ae400"), QStringLiteral("#00ccdd")};
+
+    u32 api_index = static_cast<u32>(Settings::values.graphics_api.GetValue());
+    if (update) {
+        api_index = (api_index + 1) % graphics_apis.size();
+        Settings::values.graphics_api = static_cast<Settings::GraphicsAPI>(api_index);
+    }
+
+    const QString style_sheet = QStringLiteral("QPushButton { font-weight: bold; color: %0; }")
+                                    .arg(graphics_api_colors[api_index]);
+
+    graphics_api_button->setText(graphics_apis[api_index]);
+    graphics_api_button->setStyleSheet(style_sheet);
+}
+
 void GMainWindow::OnMouseActivity() {
     ShowMouseCursor();
 }

src/citra_qt/main.h

@@ -7,6 +7,7 @@
 #include <array>
 #include <memory>
 #include <QMainWindow>
+#include <QPushButton>
 #include <QTimer>
 #include <QTranslator>
 #include "citra_qt/compatibility_list.h"
@@ -261,6 +262,7 @@ private:
     void HideMouseCursor();
     void ShowMouseCursor();
     void OpenPerGameConfiguration(u64 title_id, const QString& file_name);
+    void UpdateAPIIndicator(bool update = false);
 
     std::unique_ptr<Ui::MainWindow> ui;
     Core::System& system;
@@ -278,6 +280,7 @@ private:
     QLabel* emu_speed_label = nullptr;
     QLabel* game_fps_label = nullptr;
     QLabel* emu_frametime_label = nullptr;
+    QPushButton* graphics_api_button = nullptr;
     QTimer status_bar_update_timer;
     bool message_label_used_for_movie = false;