Switch: Avoid loading Vulkan.

CMakeLists.txt

@@ -83,7 +83,7 @@ if(NOT ANDROID AND NOT IOS)
 	endif()
 endif()
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+if(${CMAKE_SYSTEM_NAME} MATCHES "Linux" AND NOT USE_LIBNX)
 	set(LINUX ON)
 	add_definitions(-D__STDC_CONSTANT_MACROS)
 endif()
@@ -146,6 +146,7 @@ option(UNITTEST "Set to ON to generate the unittest target" ${UNITTEST})
 option(SIMULATOR "Set to ON when targeting an x86 simulator of an ARM platform" ${SIMULATOR})
 option(LIBRETRO "Set to ON to generate the libretro target" OFF)
 # :: Options
+option(USE_LIBNX "Set to ON to build for Switch(libnx)" OFF)
 option(USE_FFMPEG "Build with FFMPEG support" ON)
 option(USE_DISCORD "Build with Discord support" ON)
 option(USE_MINIUPNPC "Build with miniUPnPc support" ON)
@@ -1147,8 +1148,12 @@ elseif(TARGET SDL2::SDL2)
 		SDL/SDLJoystick.cpp
 		SDL/SDLMain.cpp
 		SDL/SDLGLGraphicsContext.cpp
-		SDL/SDLVulkanGraphicsContext.cpp
 	)
+	if(NOT USE_LIBNX)
+		set(nativeExtra ${nativeExtra}
+			SDL/SDLVulkanGraphicsContext.cpp
+		)
+	endif()
 	set(nativeExtraLibs ${nativeExtraLibs} SDL2::SDL2)
 	if(APPLE)
 		set(nativeExtra ${nativeExtra} SDL/SDLMain.h SDL/SDLMain.mm SDL/SDLCocoaMetalLayer.h SDL/SDLCocoaMetalLayer.mm)

Common/GPU/Vulkan/VulkanLoader.cpp

@@ -24,7 +24,7 @@
 #include "Common/Log.h"
 #include "Common/System/System.h"
 
-#ifndef _WIN32
+#if !PPSSPP_PLATFORM(WINDOWS) && !PPSSPP_PLATFORM(SWITCH)
 #include <dlfcn.h>
 #endif
 
@@ -224,11 +224,17 @@ PFN_vkGetPhysicalDeviceFeatures2KHR vkGetPhysicalDeviceFeatures2KHR;
 
 using namespace PPSSPP_VK;
 
-#ifdef _WIN32
-static HINSTANCE vulkanLibrary;
+#if PPSSPP_PLATFORM(SWITCH)
+typedef void *VulkanLibraryHandle;
+static VulkanLibraryHandle vulkanLibrary;
+#define dlsym(x, y) nullptr
+#elif PPSSPP_PLATFORM(WINDOWS)
+typedef HINSTANCE VulkanLibraryHandle;
+static VulkanLibraryHandle vulkanLibrary;
 #define dlsym(x, y) GetProcAddress(x, y)
 #else
-static void *vulkanLibrary;
+typedef void *VulkanLibraryHandle;
+static VulkanLibraryHandle vulkanLibrary;
 #endif
 const char *VulkanResultToString(VkResult res);
 
@@ -261,6 +267,38 @@ static const char *so_names[] = {
 };
 #endif
 
+static VulkanLibraryHandle VulkanLoadLibrary(const char *logname) {
+#if PPSSPP_PLATFORM(SWITCH)
+	// Always unavailable, for now.
+	return nullptr;
+#elif PPSSPP_PLATFORM(WINDOWS)
+	return LoadLibrary(L"vulkan-1.dll");
+#else
+	void *lib = nullptr;
+	for (int i = 0; i < ARRAY_SIZE(so_names); i++) {
+		lib = dlopen(so_names[i], RTLD_NOW | RTLD_LOCAL);
+		if (lib) {
+			INFO_LOG(G3D, "%s: Library loaded ('%s')", logname, so_names[i]);
+			break;
+		}
+	}
+	return lib;
+#endif
+}
+
+static void VulkanFreeLibrary(VulkanLibraryHandle &h) {
+	if (h) {
+#if PPSSPP_PLATFORM(SWITCH)
+		// Can't load, and can't free.
+#elif PPSSPP_PLATFORM(WINDOWS)
+		FreeLibrary(h);
+#else
+		dlclose(h);
+#endif
+		h = nullptr;
+	}
+}
+
 void VulkanSetAvailable(bool available) {
 	g_vulkanAvailabilityChecked = true;
 	g_vulkanMayBeAvailable = available;
@@ -282,19 +320,7 @@ bool VulkanMayBeAvailable() {
 	}
 	INFO_LOG(G3D, "VulkanMayBeAvailable: Device allowed ('%s')", name.c_str());
 
-#ifndef _WIN32
-	void *lib = nullptr;
-	for (int i = 0; i < ARRAY_SIZE(so_names); i++) {
-		lib = dlopen(so_names[i], RTLD_NOW | RTLD_LOCAL);
-		if (lib) {
-			INFO_LOG(G3D, "VulkanMayBeAvailable: Library loaded ('%s')", so_names[i]);
-			break;
-		}
-	}
-#else
-	// LoadLibrary etc
-	HINSTANCE lib = LoadLibrary(L"vulkan-1.dll");
-#endif
+	VulkanLibraryHandle lib = VulkanLoadLibrary("VulkanMayBeAvailable");
 	if (!lib) {
 		INFO_LOG(G3D, "Vulkan loader: Library not available");
 		g_vulkanAvailabilityChecked = true;
@@ -452,11 +478,7 @@ bail:
 		localDestroyInstance(instance, nullptr);
 	}
 	if (lib) {
-#ifndef _WIN32
-		dlclose(lib);
-#else
-		FreeLibrary(lib);
-#endif
+		VulkanFreeLibrary(lib);
 	} else {
 		ERROR_LOG(G3D, "Vulkan with working device not detected.");
 	}
@@ -465,18 +487,7 @@ bail:
 
 bool VulkanLoad() {
 	if (!vulkanLibrary) {
-#ifndef _WIN32
-		for (int i = 0; i < ARRAY_SIZE(so_names); i++) {
-			vulkanLibrary = dlopen(so_names[i], RTLD_NOW | RTLD_LOCAL);
-			if (vulkanLibrary) {
-				INFO_LOG(G3D, "VulkanLoad: Found library '%s'", so_names[i]);
-				break;
-			}
-		}
-#else
-		// LoadLibrary etc
-		vulkanLibrary = LoadLibrary(L"vulkan-1.dll");
-#endif
+		vulkanLibrary = VulkanLoadLibrary("VulkanLoad");
 		if (!vulkanLibrary) {
 			return false;
 		}
@@ -495,12 +506,7 @@ bool VulkanLoad() {
 		return true;
 	} else {
 		ERROR_LOG(G3D, "VulkanLoad: Failed to load Vulkan base functions.");
-#ifndef _WIN32
-		dlclose(vulkanLibrary);
-#else
-		FreeLibrary(vulkanLibrary);
-#endif
-		vulkanLibrary = nullptr;
+		VulkanFreeLibrary(vulkanLibrary);
 		return false;
 	}
 }
@@ -706,12 +712,5 @@ void VulkanLoadDeviceFunctions(VkDevice device, const VulkanExtensions &enabledE
 }
 
 void VulkanFree() {
-	if (vulkanLibrary) {
-#ifdef _WIN32
-		FreeLibrary(vulkanLibrary);
-#else
-		dlclose(vulkanLibrary);
-#endif
-		vulkanLibrary = nullptr;
-	}
+	VulkanFreeLibrary(vulkanLibrary);
 }

GPU/GPU.cpp

@@ -95,6 +95,7 @@ bool GPU_Init(GraphicsContext *ctx, Draw::DrawContext *draw) {
 #else
 		return false;
 #endif
+#if !PPSSPP_PLATFORM(SWITCH)
 	case GPUCORE_VULKAN:
 		if (!ctx) {
 			ERROR_LOG(G3D, "Unable to init Vulkan GPU backend, no context");
@@ -102,6 +103,7 @@ bool GPU_Init(GraphicsContext *ctx, Draw::DrawContext *draw) {
 		}
 		SetGPU(new GPU_Vulkan(ctx, draw));
 		break;
+#endif
 	}
 
 	return gpu != NULL;

SDL/SDLMain.cpp

@@ -735,6 +735,7 @@ int main(int argc, char *argv[]) {
 			printf("GL init error '%s'\n", error_message.c_str());
 		}
 		graphicsContext = ctx;
+#if !PPSSPP_PLATFORM(SWITCH)
 	} else if (g_Config.iGPUBackend == (int)GPUBackend::VULKAN) {
 		SDLVulkanGraphicsContext *ctx = new SDLVulkanGraphicsContext();
 		if (!ctx->Init(window, x, y, mode, &error_message)) {
@@ -748,6 +749,7 @@ int main(int argc, char *argv[]) {
 		} else {
 			graphicsContext = ctx;
 		}
+#endif
 	}
 
 	bool useEmuThread = g_Config.iGPUBackend == (int)GPUBackend::OPENGL;

UI/EmuScreen.cpp

@@ -1496,7 +1496,7 @@ void EmuScreen::renderUI() {
 		DrawFrameTimes(ctx, ctx->GetLayoutBounds());
 	}
 
-#if !PPSSPP_PLATFORM(UWP)
+#if !PPSSPP_PLATFORM(UWP) && !PPSSPP_PLATFORM(SWITCH)
 	if (g_Config.iGPUBackend == (int)GPUBackend::VULKAN && g_Config.bShowAllocatorDebug) {
 		DrawAllocatorVis(ctx, gpu);
 	}

libretro/LibretroGraphicsContext.cpp

@@ -109,6 +109,7 @@ LibretroGraphicsContext *LibretroGraphicsContext::CreateGraphicsContext() {
 		delete ctx;
 	}
 
+#ifndef HAVE_LIBNX
 	if (preferred == RETRO_HW_CONTEXT_DUMMY || preferred == RETRO_HW_CONTEXT_VULKAN) {
 		ctx = new LibretroVulkanContext();
 
@@ -117,6 +118,7 @@ LibretroGraphicsContext *LibretroGraphicsContext::CreateGraphicsContext() {
 		}
 		delete ctx;
 	}
+#endif
 
 #ifdef _WIN32
 	if (preferred == RETRO_HW_CONTEXT_DUMMY || preferred == RETRO_HW_CONTEXT_DIRECT3D) {