10 files changed, 264 insertions, 1 deletions

diff --git a/src/yuzu_cmd/CMakeLists.txt b/src/yuzu_cmd/CMakeLists.txt
index b5f06ab9e..a15719a0f 100644
--- a/src/yuzu_cmd/CMakeLists.txt
+++ b/src/yuzu_cmd/CMakeLists.txt
@@ -8,11 +8,22 @@ add_executable(yuzu-cmd
     emu_window/emu_window_sdl2_gl.h
     emu_window/emu_window_sdl2.cpp
     emu_window/emu_window_sdl2.h
+    emu_window/emu_window_sdl2_gl.cpp
+    emu_window/emu_window_sdl2_gl.h
     resource.h
     yuzu.cpp
     yuzu.rc
 )
 
+if (ENABLE_VULKAN)
+    target_sources(yuzu-cmd PRIVATE
+                   emu_window/emu_window_sdl2_vk.cpp
+                   emu_window/emu_window_sdl2_vk.h)
+
+    target_include_directories(yuzu-cmd PRIVATE ../../externals/Vulkan-Headers/include)
+    target_compile_definitions(yuzu-cmd PRIVATE HAS_VULKAN)
+endif()
+
 create_target_directory_groups(yuzu-cmd)
 
 target_link_libraries(yuzu-cmd PRIVATE common core input_common)
diff --git a/src/yuzu_cmd/config.cpp b/src/yuzu_cmd/config.cpp
index 161583b54..b01a36023 100644
--- a/src/yuzu_cmd/config.cpp
+++ b/src/yuzu_cmd/config.cpp
@@ -371,6 +371,12 @@ void Config::ReadValues() {
     Settings::values.use_multi_core = sdl2_config->GetBoolean("Core", "use_multi_core", false);
 
     // Renderer
+    const int renderer_backend = sdl2_config->GetInteger(
+        "Renderer", "backend", static_cast<int>(Settings::RendererBackend::OpenGL));
+    Settings::values.renderer_backend = static_cast<Settings::RendererBackend>(renderer_backend);
+    Settings::values.renderer_debug = sdl2_config->GetBoolean("Renderer", "debug", false);
+    Settings::values.vulkan_device = sdl2_config->GetInteger("Renderer", "vulkan_device", 0);
+
     Settings::values.resolution_factor =
         static_cast<float>(sdl2_config->GetReal("Renderer", "resolution_factor", 1.0));
     Settings::values.use_frame_limit = sdl2_config->GetBoolean("Renderer", "use_frame_limit", true);
diff --git a/src/yuzu_cmd/default_ini.h b/src/yuzu_cmd/default_ini.h
index e829f8695..00fd88279 100644
--- a/src/yuzu_cmd/default_ini.h
+++ b/src/yuzu_cmd/default_ini.h
@@ -98,6 +98,17 @@ udp_pad_index=
 use_multi_core=
 
 [Renderer]
+# Which backend API to use.
+# 0 (default): OpenGL, 1: Vulkan
+backend =
+
+# Enable graphics API debugging mode.
+# 0 (default): Disabled, 1: Enabled
+debug =
+
+# Which Vulkan physical device to use (defaults to 0)
+vulkan_device =
+
 # Whether to use software or hardware rendering.
 # 0: Software, 1 (default): Hardware
 use_hw_renderer =
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
index b1c512db1..e96139885 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
@@ -89,6 +89,10 @@ bool EmuWindow_SDL2::IsOpen() const {
     return is_open;
 }
 
+bool EmuWindow_SDL2::IsShown() const {
+    return is_shown;
+}
+
 void EmuWindow_SDL2::OnResize() {
     int width, height;
     SDL_GetWindowSize(render_window, &width, &height);
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2.h b/src/yuzu_cmd/emu_window/emu_window_sdl2.h
index eaa971f77..b38f56661 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2.h
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2.h
@@ -21,6 +21,9 @@ public:
     /// Whether the window is still open, and a close request hasn't yet been sent
     bool IsOpen() const;
 
+    /// Returns if window is shown (not minimized)
+    bool IsShown() const override;
+
 protected:
     /// Called by PollEvents when a key is pressed or released.
     void OnKeyEvent(int key, u8 state);
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
index 6fde694a2..7ffa0ac09 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
@@ -9,6 +9,7 @@
 #include <SDL.h>
 #include <fmt/format.h>
 #include <glad/glad.h>
+#include "common/assert.h"
 #include "common/logging/log.h"
 #include "common/scm_rev.h"
 #include "common/string_util.h"
@@ -151,6 +152,12 @@ void EmuWindow_SDL2_GL::DoneCurrent() {
     SDL_GL_MakeCurrent(render_window, nullptr);
 }
 
+void EmuWindow_SDL2_GL::RetrieveVulkanHandlers(void* get_instance_proc_addr, void* instance,
+                                               void* surface) const {
+    // Should not have been called from OpenGL
+    UNREACHABLE();
+}
+
 std::unique_ptr<Core::Frontend::GraphicsContext> EmuWindow_SDL2_GL::CreateSharedContext() const {
     return std::make_unique<SDLGLContext>();
 }
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h
index 630deba93..c753085a8 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h
@@ -22,6 +22,10 @@ public:
     /// Releases the GL context from the caller thread
     void DoneCurrent() override;
 
+    /// Ignored in OpenGL
+    void RetrieveVulkanHandlers(void* get_instance_proc_addr, void* instance,
+                                void* surface) const override;
+
     std::unique_ptr<Core::Frontend::GraphicsContext> CreateSharedContext() const override;
 
 private:
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
new file mode 100644
index 000000000..a203f0da9
--- /dev/null
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
@@ -0,0 +1,162 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <string>
+#include <vector>
+#include <SDL.h>
+#include <SDL_vulkan.h>
+#include <fmt/format.h>
+#include <vulkan/vulkan.h>
+#include "common/assert.h"
+#include "common/logging/log.h"
+#include "common/scm_rev.h"
+#include "core/settings.h"
+#include "yuzu_cmd/emu_window/emu_window_sdl2_vk.h"
+
+EmuWindow_SDL2_VK::EmuWindow_SDL2_VK(bool fullscreen) : EmuWindow_SDL2(fullscreen) {
+    if (SDL_Vulkan_LoadLibrary(nullptr) != 0) {
+        LOG_CRITICAL(Frontend, "SDL failed to load the Vulkan library: {}", SDL_GetError());
+        exit(EXIT_FAILURE);
+    }
+
+    vkGetInstanceProcAddr =
+        reinterpret_cast<PFN_vkGetInstanceProcAddr>(SDL_Vulkan_GetVkGetInstanceProcAddr());
+    if (vkGetInstanceProcAddr == nullptr) {
+        LOG_CRITICAL(Frontend, "Failed to retrieve Vulkan function pointer!");
+        exit(EXIT_FAILURE);
+    }
+
+    const std::string window_title = fmt::format("yuzu {} | {}-{} (Vulkan)", Common::g_build_name,
+                                                 Common::g_scm_branch, Common::g_scm_desc);
+    render_window =
+        SDL_CreateWindow(window_title.c_str(),
+                         SDL_WINDOWPOS_UNDEFINED, // x position
+                         SDL_WINDOWPOS_UNDEFINED, // y position
+                         Layout::ScreenUndocked::Width, Layout::ScreenUndocked::Height,
+                         SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI | SDL_WINDOW_VULKAN);
+
+    const bool use_standard_layers = UseStandardLayers(vkGetInstanceProcAddr);
+
+    u32 extra_ext_count{};
+    if (!SDL_Vulkan_GetInstanceExtensions(render_window, &extra_ext_count, NULL)) {
+        LOG_CRITICAL(Frontend, "Failed to query Vulkan extensions count from SDL! {}",
+                     SDL_GetError());
+        exit(1);
+    }
+
+    auto extra_ext_names = std::make_unique<const char* []>(extra_ext_count);
+    if (!SDL_Vulkan_GetInstanceExtensions(render_window, &extra_ext_count, extra_ext_names.get())) {
+        LOG_CRITICAL(Frontend, "Failed to query Vulkan extensions from SDL! {}", SDL_GetError());
+        exit(1);
+    }
+    std::vector<const char*> enabled_extensions;
+    enabled_extensions.insert(enabled_extensions.begin(), extra_ext_names.get(),
+                              extra_ext_names.get() + extra_ext_count);
+
+    std::vector<const char*> enabled_layers;
+    if (use_standard_layers) {
+        enabled_extensions.push_back(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
+        enabled_layers.push_back("VK_LAYER_LUNARG_standard_validation");
+    }
+
+    VkApplicationInfo app_info{};
+    app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
+    app_info.apiVersion = VK_API_VERSION_1_1;
+    app_info.applicationVersion = VK_MAKE_VERSION(0, 1, 0);
+    app_info.pApplicationName = "yuzu-emu";
+    app_info.engineVersion = VK_MAKE_VERSION(0, 1, 0);
+    app_info.pEngineName = "yuzu-emu";
+
+    VkInstanceCreateInfo instance_ci{};
+    instance_ci.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
+    instance_ci.pApplicationInfo = &app_info;
+    instance_ci.enabledExtensionCount = static_cast<u32>(enabled_extensions.size());
+    instance_ci.ppEnabledExtensionNames = enabled_extensions.data();
+    if (Settings::values.renderer_debug) {
+        instance_ci.enabledLayerCount = static_cast<u32>(enabled_layers.size());
+        instance_ci.ppEnabledLayerNames = enabled_layers.data();
+    }
+
+    const auto vkCreateInstance =
+        reinterpret_cast<PFN_vkCreateInstance>(vkGetInstanceProcAddr(nullptr, "vkCreateInstance"));
+    if (vkCreateInstance == nullptr ||
+        vkCreateInstance(&instance_ci, nullptr, &vk_instance) != VK_SUCCESS) {
+        LOG_CRITICAL(Frontend, "Failed to create Vulkan instance!");
+        exit(EXIT_FAILURE);
+    }
+
+    vkDestroyInstance = reinterpret_cast<PFN_vkDestroyInstance>(
+        vkGetInstanceProcAddr(vk_instance, "vkDestroyInstance"));
+    if (vkDestroyInstance == nullptr) {
+        LOG_CRITICAL(Frontend, "Failed to retrieve Vulkan function pointer!");
+        exit(EXIT_FAILURE);
+    }
+
+    if (!SDL_Vulkan_CreateSurface(render_window, vk_instance, &vk_surface)) {
+        LOG_CRITICAL(Frontend, "Failed to create Vulkan surface! {}", SDL_GetError());
+        exit(EXIT_FAILURE);
+    }
+
+    OnResize();
+    OnMinimalClientAreaChangeRequest(GetActiveConfig().min_client_area_size);
+    SDL_PumpEvents();
+    LOG_INFO(Frontend, "yuzu Version: {} | {}-{} (Vulkan)", Common::g_build_name,
+             Common::g_scm_branch, Common::g_scm_desc);
+}
+
+EmuWindow_SDL2_VK::~EmuWindow_SDL2_VK() {
+    vkDestroyInstance(vk_instance, nullptr);
+}
+
+void EmuWindow_SDL2_VK::SwapBuffers() {}
+
+void EmuWindow_SDL2_VK::MakeCurrent() {
+    // Unused on Vulkan
+}
+
+void EmuWindow_SDL2_VK::DoneCurrent() {
+    // Unused on Vulkan
+}
+
+void EmuWindow_SDL2_VK::RetrieveVulkanHandlers(void* get_instance_proc_addr, void* instance,
+                                               void* surface) const {
+    const auto instance_proc_addr = vkGetInstanceProcAddr;
+    std::memcpy(get_instance_proc_addr, &instance_proc_addr, sizeof(instance_proc_addr));
+    std::memcpy(instance, &vk_instance, sizeof(vk_instance));
+    std::memcpy(surface, &vk_surface, sizeof(vk_surface));
+}
+
+std::unique_ptr<Core::Frontend::GraphicsContext> EmuWindow_SDL2_VK::CreateSharedContext() const {
+    return nullptr;
+}
+
+bool EmuWindow_SDL2_VK::UseStandardLayers(PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr) const {
+    if (!Settings::values.renderer_debug) {
+        return false;
+    }
+
+    const auto vkEnumerateInstanceLayerProperties =
+        reinterpret_cast<PFN_vkEnumerateInstanceLayerProperties>(
+            vkGetInstanceProcAddr(nullptr, "vkEnumerateInstanceLayerProperties"));
+    if (vkEnumerateInstanceLayerProperties == nullptr) {
+        LOG_CRITICAL(Frontend, "Failed to retrieve Vulkan function pointer!");
+        return false;
+    }
+
+    u32 available_layers_count{};
+    if (vkEnumerateInstanceLayerProperties(&available_layers_count, nullptr) != VK_SUCCESS) {
+        LOG_CRITICAL(Frontend, "Failed to enumerate Vulkan validation layers!");
+        return false;
+    }
+    std::vector<VkLayerProperties> layers(available_layers_count);
+    if (vkEnumerateInstanceLayerProperties(&available_layers_count, layers.data()) != VK_SUCCESS) {
+        LOG_CRITICAL(Frontend, "Failed to enumerate Vulkan validation layers!");
+        return false;
+    }
+
+    return std::find_if(layers.begin(), layers.end(), [&](const auto& layer) {
+               return layer.layerName == std::string("VK_LAYER_LUNARG_standard_validation");
+           }) != layers.end();
+}
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h
new file mode 100644
index 000000000..2a7c06a24
--- /dev/null
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h
@@ -0,0 +1,39 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vulkan/vulkan.h>
+#include "core/frontend/emu_window.h"
+#include "yuzu_cmd/emu_window/emu_window_sdl2.h"
+
+class EmuWindow_SDL2_VK final : public EmuWindow_SDL2 {
+public:
+    explicit EmuWindow_SDL2_VK(bool fullscreen);
+    ~EmuWindow_SDL2_VK();
+
+    /// Swap buffers to display the next frame
+    void SwapBuffers() override;
+
+    /// Makes the graphics context current for the caller thread
+    void MakeCurrent() override;
+
+    /// Releases the GL context from the caller thread
+    void DoneCurrent() override;
+
+    /// Retrieves Vulkan specific handlers from the window
+    void RetrieveVulkanHandlers(void* get_instance_proc_addr, void* instance,
+                                void* surface) const override;
+
+    std::unique_ptr<Core::Frontend::GraphicsContext> CreateSharedContext() const override;
+
+private:
+    bool UseStandardLayers(PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr) const;
+
+    VkInstance vk_instance{};
+    VkSurfaceKHR vk_surface{};
+
+    PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr{};
+    PFN_vkDestroyInstance vkDestroyInstance{};
+};
diff --git a/src/yuzu_cmd/yuzu.cpp b/src/yuzu_cmd/yuzu.cpp
index 3ee088a91..325795321 100644
--- a/src/yuzu_cmd/yuzu.cpp
+++ b/src/yuzu_cmd/yuzu.cpp
@@ -32,6 +32,9 @@
 #include "yuzu_cmd/config.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2_gl.h"
+#ifdef HAS_VULKAN
+#include "yuzu_cmd/emu_window/emu_window_sdl2_vk.h"
+#endif
 
 #include "core/file_sys/registered_cache.h"
 
@@ -174,7 +177,20 @@ int main(int argc, char** argv) {
     Settings::values.use_gdbstub = use_gdbstub;
     Settings::Apply();
 
-    std::unique_ptr<EmuWindow_SDL2> emu_window{std::make_unique<EmuWindow_SDL2_GL>(fullscreen)};
+    std::unique_ptr<EmuWindow_SDL2> emu_window;
+    switch (Settings::values.renderer_backend) {
+    case Settings::RendererBackend::OpenGL:
+        emu_window = std::make_unique<EmuWindow_SDL2_GL>(fullscreen);
+        break;
+    case Settings::RendererBackend::Vulkan:
+#ifdef HAS_VULKAN
+        emu_window = std::make_unique<EmuWindow_SDL2_VK>(fullscreen);
+        break;
+#else
+        LOG_CRITICAL(Frontend, "Vulkan backend has not been compiled!");
+        return 1;
+#endif
+    }
 
     if (!Settings::values.use_multi_core) {
         // Single core mode must acquire OpenGL context for entire emulation session