More windowing changes for renderdoc

src/Engine/Graphics/Vulkan/Graphics.cpp

@@ -16,10 +16,12 @@
 #include "RenderPass.h"
 #include "Shader.h"
 #include "Window.h"
+#include <cstring>
+#include <cstdlib>
+#include <vector>
 #include <GLFW/glfw3.h>
 #include <GLFW/glfw3native.h>
 #include <vulkan/vulkan_wayland.h>
-#include <cstring>
 #include <vulkan/vulkan_core.h>
 
 #define VMA_IMPLEMENTATION
@@ -28,6 +30,63 @@
 using namespace Seele;
 using namespace Seele::Vulkan;
 
+namespace {
+std::vector<VkExtensionProperties> enumerateInstanceExtensions() {
+    uint32_t extensionCount = 0;
+    VK_CHECK(vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, nullptr));
+    std::vector<VkExtensionProperties> extensions(extensionCount);
+    if (extensionCount > 0) {
+        VK_CHECK(vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, extensions.data()));
+    }
+    return extensions;
+}
+
+bool hasInstanceExtension(const std::vector<VkExtensionProperties>& extensions, const char* extensionName) {
+    for (const auto& extension : extensions) {
+        if (std::strcmp(extension.extensionName, extensionName) == 0) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void applyCommonGlfwInitHints() {
+#if defined(GLFW_WAYLAND_LIBDECOR) && defined(GLFW_WAYLAND_DISABLE_LIBDECOR)
+    glfwInitHint(GLFW_WAYLAND_LIBDECOR, GLFW_WAYLAND_DISABLE_LIBDECOR);
+#endif
+}
+
+void initializeGlfwForVulkan() {
+    applyCommonGlfwInitHints();
+    if (!glfwInit()) {
+        throw std::runtime_error("Failed to initialize GLFW");
+    }
+    if (!glfwVulkanSupported()) {
+        throw std::runtime_error("GLFW: Vulkan not supported");
+    }
+
+#if defined(GLFW_PLATFORM_WAYLAND) && defined(GLFW_PLATFORM_X11)
+    const auto availableExtensions = enumerateInstanceExtensions();
+    const bool hasWaylandSurface = hasInstanceExtension(availableExtensions, "VK_KHR_wayland_surface");
+    const bool hasXlibSurface = hasInstanceExtension(availableExtensions, "VK_KHR_xlib_surface");
+    const bool hasXcbSurface = hasInstanceExtension(availableExtensions, "VK_KHR_xcb_surface");
+
+    if (glfwGetPlatform() == GLFW_PLATFORM_WAYLAND && !hasWaylandSurface && (hasXlibSurface || hasXcbSurface)) {
+        std::cerr << "Warning: Vulkan loader does not expose VK_KHR_wayland_surface on this run. Reinitializing GLFW on X11 backend." << std::endl;
+        glfwTerminate();
+        applyCommonGlfwInitHints();
+        glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_X11);
+        if (!glfwInit()) {
+            throw std::runtime_error("Failed to reinitialize GLFW on X11 backend");
+        }
+        if (!glfwVulkanSupported()) {
+            throw std::runtime_error("GLFW: Vulkan not supported after switching to X11 backend");
+        }
+    }
+#endif
+}
+}
+
 thread_local PCommandPool Seele::Vulkan::Graphics::graphicsCommands = nullptr;
 thread_local PCommandPool Seele::Vulkan::Graphics::computeCommands = nullptr;
 thread_local PCommandPool Seele::Vulkan::Graphics::transferCommands = nullptr;
@@ -675,31 +734,46 @@ Array<const char*> Graphics::getRequiredExtensions() {
             message += ": ";
             message += glfwError;
         }
-        extensions.add(VK_KHR_SURFACE_EXTENSION_NAME);
-        extensions.add(VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME);
-        std::cerr << "Warning: " << message << ". Falling back to a default set of extensions." << std::endl;
+        std::cerr << "Warning: " << message << ". Falling back to platform-specific surface extensions." << std::endl;
+
+        extensions.addUnique(VK_KHR_SURFACE_EXTENSION_NAME);
+
+#if defined(GLFW_PLATFORM_WAYLAND) && defined(GLFW_PLATFORM_X11)
+        const int platform = glfwGetPlatform();
+        if (platform == GLFW_PLATFORM_WAYLAND) {
+            extensions.addUnique("VK_KHR_wayland_surface");
+        } else if (platform == GLFW_PLATFORM_X11) {
+            extensions.addUnique("VK_KHR_xlib_surface");
+            extensions.addUnique("VK_KHR_xcb_surface");
+        } else {
+            extensions.addUnique("VK_KHR_wayland_surface");
+            extensions.addUnique("VK_KHR_xlib_surface");
+            extensions.addUnique("VK_KHR_xcb_surface");
+        }
+#else
+        bool isWayland = std::getenv("WAYLAND_DISPLAY") != nullptr;
+        if (isWayland) {
+            extensions.addUnique("VK_KHR_wayland_surface");
+        } else {
+            extensions.addUnique("VK_KHR_xlib_surface");
+            extensions.addUnique("VK_KHR_xcb_surface");
+        }
+#endif
+    } else {
+        // GLFW successfully reported extensions
+        for (unsigned int i = 0; i < glfwExtensionCount; i++) {
+            extensions.addUnique(glfwExtensions[i]);
+        }
     }
 
-    for (unsigned int i = 0; i < glfwExtensionCount; i++) {
-        extensions.add(glfwExtensions[i]);
-    }
 #ifdef ENABLE_VALIDATION
-    extensions.add(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
+    extensions.addUnique(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
 #endif
     return extensions;
 }
 
 void Graphics::initInstance(GraphicsInitializer initInfo) {
-#if defined(GLFW_WAYLAND_LIBDECOR) && defined(GLFW_WAYLAND_DISABLE_LIBDECOR)
-    // Work around libdecor runtime regressions on some Wayland stacks.
-    glfwInitHint(GLFW_WAYLAND_LIBDECOR, GLFW_WAYLAND_DISABLE_LIBDECOR);
-#endif
-    if (!glfwInit()) {
-        throw std::runtime_error("Failed to initialize GLFW");
-    }
-    if (!glfwVulkanSupported()) {
-        throw std::runtime_error("GLFW: Vulkan not supported");
-    }
+    initializeGlfwForVulkan();
     VkApplicationInfo appInfo = {
         .sType = VK_STRUCTURE_TYPE_APPLICATION_INFO,
         .pNext = nullptr,
@@ -712,10 +786,10 @@ void Graphics::initInstance(GraphicsInitializer initInfo) {
 
     Array<const char*> extensions = getRequiredExtensions();
     for (uint32 i = 0; i < initInfo.instanceExtensions.size(); ++i) {
-        extensions.add(initInfo.instanceExtensions[i]);
+        extensions.addUnique(initInfo.instanceExtensions[i]);
     }
 #ifdef __APPLE__
-    extensions.add("VK_KHR_portability_enumeration");
+    extensions.addUnique("VK_KHR_portability_enumeration");
 #endif
     Array<const char*> layers = initInfo.layers;
     VkInstanceCreateInfo info = {

src/Engine/Graphics/Vulkan/Window.cpp

@@ -3,12 +3,79 @@
 #include "Enums.h"
 #include "Graphics.h"
 #include "Resources.h"
+#define GLFW_EXPOSE_NATIVE_WAYLAND
+#define GLFW_EXPOSE_NATIVE_X11
 #include <GLFW/glfw3.h>
+#include <GLFW/glfw3native.h>
+#include <X11/Xlib.h>
 #include <sstream>
+#include <vulkan/vulkan_wayland.h>
+#include <vulkan/vulkan_xlib.h>
 
 using namespace Seele;
 using namespace Seele::Vulkan;
 
+namespace {
+VkResult createSurfaceFromNativeHandles(VkInstance instance, GLFWwindow* handle, VkSurfaceKHR* surface, std::string& reason) {
+#if defined(GLFW_PLATFORM_WAYLAND)
+    if (glfwGetPlatform() == GLFW_PLATFORM_WAYLAND) {
+        auto createWaylandSurface = reinterpret_cast<PFN_vkCreateWaylandSurfaceKHR>(
+            vkGetInstanceProcAddr(instance, "vkCreateWaylandSurfaceKHR"));
+        if (createWaylandSurface == nullptr) {
+            reason = "vkCreateWaylandSurfaceKHR is unavailable on the Vulkan instance";
+            return VK_ERROR_EXTENSION_NOT_PRESENT;
+        }
+
+        wl_display* display = glfwGetWaylandDisplay();
+        wl_surface* waylandSurface = glfwGetWaylandWindow(handle);
+        if (display == nullptr || waylandSurface == nullptr) {
+            reason = "GLFW did not provide valid Wayland native handles";
+            return VK_ERROR_INITIALIZATION_FAILED;
+        }
+
+        VkWaylandSurfaceCreateInfoKHR createInfo = {
+            .sType = VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR,
+            .pNext = nullptr,
+            .flags = 0,
+            .display = display,
+            .surface = waylandSurface,
+        };
+        return createWaylandSurface(instance, &createInfo, nullptr, surface);
+    }
+#endif
+
+#if defined(GLFW_PLATFORM_X11)
+    if (glfwGetPlatform() == GLFW_PLATFORM_X11) {
+        auto createXlibSurface = reinterpret_cast<PFN_vkCreateXlibSurfaceKHR>(
+            vkGetInstanceProcAddr(instance, "vkCreateXlibSurfaceKHR"));
+        if (createXlibSurface == nullptr) {
+            reason = "vkCreateXlibSurfaceKHR is unavailable on the Vulkan instance";
+            return VK_ERROR_EXTENSION_NOT_PRESENT;
+        }
+
+        Display* display = glfwGetX11Display();
+        ::Window x11Window = glfwGetX11Window(handle);
+        if (display == nullptr || x11Window == 0) {
+            reason = "GLFW did not provide valid X11 native handles";
+            return VK_ERROR_INITIALIZATION_FAILED;
+        }
+
+        VkXlibSurfaceCreateInfoKHR createInfo = {
+            .sType = VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR,
+            .pNext = nullptr,
+            .flags = 0,
+            .dpy = display,
+            .window = x11Window,
+        };
+        return createXlibSurface(instance, &createInfo, nullptr, surface);
+    }
+#endif
+
+    reason = "Unsupported GLFW platform for manual Vulkan surface creation";
+    return VK_ERROR_EXTENSION_NOT_PRESENT;
+}
+}
+
 
 double currentFrameDelta = 0;
 double Gfx::getCurrentFrameDelta() { return currentFrameDelta; }
@@ -23,41 +90,41 @@ void glfwKeyCallback(GLFWwindow* handle, int key, int, int action, int modifier)
     if (key == -1) {
         return;
     }
-    Window* window = (Window*)glfwGetWindowUserPointer(handle);
-    window->keyPress((KeyCode)key, (InputAction)action, (KeyModifier)modifier);
+    auto* window = static_cast<Seele::Vulkan::Window*>(glfwGetWindowUserPointer(handle));
+    window->keyPress(static_cast<Seele::KeyCode>(key), static_cast<InputAction>(action), static_cast<KeyModifier>(modifier));
 }
 
 void glfwMouseMoveCallback(GLFWwindow* handle, double xpos, double ypos) {
-    Window* window = (Window*)glfwGetWindowUserPointer(handle);
+    auto* window = static_cast<Seele::Vulkan::Window*>(glfwGetWindowUserPointer(handle));
     window->mouseMove(xpos, ypos);
 }
 
 void glfwMouseButtonCallback(GLFWwindow* handle, int button, int action, int modifier) {
-    Window* window = (Window*)glfwGetWindowUserPointer(handle);
-    window->mouseButton((MouseButton)button, (InputAction)action, (KeyModifier)modifier);
+    auto* window = static_cast<Seele::Vulkan::Window*>(glfwGetWindowUserPointer(handle));
+    window->mouseButton(static_cast<MouseButton>(button), static_cast<InputAction>(action), static_cast<KeyModifier>(modifier));
 }
 
 void glfwScrollCallback(GLFWwindow* handle, double xoffset, double yoffset) {
-    Window* window = (Window*)glfwGetWindowUserPointer(handle);
+    auto* window = static_cast<Seele::Vulkan::Window*>(glfwGetWindowUserPointer(handle));
     window->scroll(xoffset, yoffset);
 }
 
 void glfwFileCallback(GLFWwindow* handle, int count, const char** paths) {
-    Window* window = (Window*)glfwGetWindowUserPointer(handle);
+    auto* window = static_cast<Seele::Vulkan::Window*>(glfwGetWindowUserPointer(handle));
     window->fileDrop(count, paths);
 }
 
 void glfwCloseCallback(GLFWwindow* handle) {
-    Window* window = (Window*)glfwGetWindowUserPointer(handle);
+    auto* window = static_cast<Seele::Vulkan::Window*>(glfwGetWindowUserPointer(handle));
     window->close();
 }
 
 void glfwFramebufferResizeCallback(GLFWwindow* handle, int width, int height) {
-    Window* window = (Window*)glfwGetWindowUserPointer(handle);
+    auto* window = static_cast<Seele::Vulkan::Window*>(glfwGetWindowUserPointer(handle));
     window->resize(width, height);
 }
 
-Window::Window(PGraphics graphics, const WindowCreateInfo& createInfo)
+Seele::Vulkan::Window::Window(PGraphics graphics, const WindowCreateInfo& createInfo)
     : graphics(graphics), preferences(createInfo), instance(graphics->getInstance()), swapchain(VK_NULL_HANDLE) {
     glfwGetMonitorContentScale(glfwGetPrimaryMonitor(), &contentScaleX, &contentScaleY);
     glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
@@ -90,12 +157,20 @@ Window::Window(PGraphics graphics, const WindowCreateInfo& createInfo)
     if (surfaceResult != VK_SUCCESS || surface == VK_NULL_HANDLE) {
         const char* glfwError = nullptr;
         glfwGetError(&glfwError);
-        std::ostringstream oss;
-        oss << "Failed to create Vulkan surface via GLFW (VkResult=" << surfaceResult << ")";
-        if (glfwError != nullptr) {
-            oss << ": " << glfwError;
+
+        std::string nativeReason;
+        surfaceResult = createSurfaceFromNativeHandles(instance, handle, &surface, nativeReason);
+        if (surfaceResult != VK_SUCCESS || surface == VK_NULL_HANDLE) {
+            std::ostringstream oss;
+            oss << "Failed to create Vulkan surface via GLFW (VkResult=" << surfaceResult << ")";
+            if (glfwError != nullptr) {
+                oss << ": " << glfwError;
+            }
+            if (!nativeReason.empty()) {
+                oss << ". Native fallback failed: " << nativeReason;
+            }
+            throw std::runtime_error(oss.str());
         }
-        throw std::runtime_error(oss.str());
     }
 
     querySurface();
@@ -108,17 +183,17 @@ Window::Window(PGraphics graphics, const WindowCreateInfo& createInfo)
     createSwapChain();
 }
 
-Window::~Window() {
+Seele::Vulkan::Window::~Window() {
     vkDestroySwapchainKHR(graphics->getDevice(), swapchain, nullptr);
     vkDestroySurfaceKHR(instance, surface, nullptr);
     glfwDestroyWindow(static_cast<GLFWwindow*>(windowHandle));
 }
 
-void Window::pollInput() { glfwPollEvents(); }
+void Seele::Vulkan::Window::pollInput() { glfwPollEvents(); }
 
-void Window::show() { glfwShowWindow(static_cast<GLFWwindow*>(windowHandle)); }
+void Seele::Vulkan::Window::show() { glfwShowWindow(static_cast<GLFWwindow*>(windowHandle)); }
 
-void Window::beginFrame() {
+void Seele::Vulkan::Window::beginFrame() {
     imageAvailableFences[currentSemaphoreIndex]->reset();
     imageAvailableSemaphores[currentSemaphoreIndex]->resolveSignal();
     imageAvailableSemaphores[currentSemaphoreIndex]->rotateSemaphore();
@@ -139,7 +214,7 @@ void Window::beginFrame() {
     start = end;
 }
 
-void Window::endFrame() {
+void Seele::Vulkan::Window::endFrame() {
     swapChainTextures[currentImageIndex]->changeLayout(Gfx::SE_IMAGE_LAYOUT_PRESENT_SRC_KHR, Gfx::SE_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
                                                        Gfx::SE_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, Gfx::SE_ACCESS_MEMORY_READ_BIT,
                                                        Gfx::SE_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
@@ -169,39 +244,39 @@ void Window::endFrame() {
     // graphics->waitDeviceIdle();
 }
 
-bool Window::shouldClose() const { 
+bool Seele::Vulkan::Window::shouldClose() const { 
     return glfwWindowShouldClose((GLFWwindow*)windowHandle); 
 }
 
-Gfx::PTexture2D Window::getBackBuffer() const { return PTexture2D(swapChainTextures[currentImageIndex]); }
+Gfx::PTexture2D Seele::Vulkan::Window::getBackBuffer() const { return PTexture2D(swapChainTextures[currentImageIndex]); }
 
-void Window::setKeyCallback(std::function<void(KeyCode, InputAction, KeyModifier)> callback) { keyCallback = callback; }
+void Seele::Vulkan::Window::setKeyCallback(std::function<void(Seele::KeyCode, InputAction, KeyModifier)> callback) { keyCallback = callback; }
 
-void Window::setMouseMoveCallback(std::function<void(double, double)> callback) { mouseMoveCallback = callback; }
+void Seele::Vulkan::Window::setMouseMoveCallback(std::function<void(double, double)> callback) { mouseMoveCallback = callback; }
 
-void Window::setMouseButtonCallback(std::function<void(MouseButton, InputAction, KeyModifier)> callback) { mouseButtonCallback = callback; }
+void Seele::Vulkan::Window::setMouseButtonCallback(std::function<void(MouseButton, InputAction, KeyModifier)> callback) { mouseButtonCallback = callback; }
 
-void Window::setScrollCallback(std::function<void(double, double)> callback) { scrollCallback = callback; }
+void Seele::Vulkan::Window::setScrollCallback(std::function<void(double, double)> callback) { scrollCallback = callback; }
 
-void Window::setFileCallback(std::function<void(int, const char**)> callback) { fileCallback = callback; }
+void Seele::Vulkan::Window::setFileCallback(std::function<void(int, const char**)> callback) { fileCallback = callback; }
 
-void Window::setCloseCallback(std::function<void()> callback) { closeCallback = callback; }
+void Seele::Vulkan::Window::setCloseCallback(std::function<void()> callback) { closeCallback = callback; }
 
-void Window::setResizeCallback(std::function<void(uint32, uint32)> callback) { resizeCallback = callback; }
+void Seele::Vulkan::Window::setResizeCallback(std::function<void(uint32, uint32)> callback) { resizeCallback = callback; }
 
-void Window::keyPress(KeyCode code, InputAction action, KeyModifier modifier) { keyCallback(code, action, modifier); }
+void Seele::Vulkan::Window::keyPress(Seele::KeyCode code, InputAction action, KeyModifier modifier) { keyCallback(code, action, modifier); }
 
-void Window::mouseMove(double x, double y) { mouseMoveCallback(x, y); }
+void Seele::Vulkan::Window::mouseMove(double x, double y) { mouseMoveCallback(x, y); }
 
-void Window::mouseButton(MouseButton button, InputAction action, KeyModifier modifier) { mouseButtonCallback(button, action, modifier); }
+void Seele::Vulkan::Window::mouseButton(MouseButton button, InputAction action, KeyModifier modifier) { mouseButtonCallback(button, action, modifier); }
 
-void Window::scroll(double x, double y) { scrollCallback(x, y); }
+void Seele::Vulkan::Window::scroll(double x, double y) { scrollCallback(x, y); }
 
-void Window::fileDrop(int num, const char** files) { fileCallback(num, files); }
+void Seele::Vulkan::Window::fileDrop(int num, const char** files) { fileCallback(num, files); }
 
-void Window::close() { closeCallback(); }
+void Seele::Vulkan::Window::close() { closeCallback(); }
 
-void Window::resize(int width, int height) {
+void Seele::Vulkan::Window::resize(int width, int height) {
     if (width == 0 || height == 0) {
         paused = true;
         return;
@@ -218,7 +293,7 @@ void Window::resize(int width, int height) {
     resizeCallback(width, height);
 }
 
-void Window::querySurface() {
+void Seele::Vulkan::Window::querySurface() {
     vkGetPhysicalDeviceSurfaceCapabilitiesKHR(graphics->getPhysicalDevice(), surface, &capabilities);
 
     uint32 numFormats;
@@ -232,7 +307,7 @@ void Window::querySurface() {
     vkGetPhysicalDeviceSurfacePresentModesKHR(graphics->getPhysicalDevice(), surface, &numPresentModes, supportedPresentModes.data());
 }
 
-void Window::chooseSwapSurfaceFormat() {
+void Seele::Vulkan::Window::chooseSwapSurfaceFormat() {
     for (const auto& supportedFormat : supportedFormats) {
         if (supportedFormat.format == cast(preferences.preferredFormat)) {
             format = supportedFormat;
@@ -248,7 +323,7 @@ void Window::chooseSwapSurfaceFormat() {
     format = supportedFormats[0];
 }
 
-void Window::chooseSwapPresentMode() {
+void Seele::Vulkan::Window::chooseSwapPresentMode() {
     for (const auto& supportedPresentMode : supportedPresentModes) {
         if (supportedPresentMode == VK_PRESENT_MODE_MAILBOX_KHR) {
             presentMode = supportedPresentMode;
@@ -258,7 +333,7 @@ void Window::chooseSwapPresentMode() {
     presentMode = VK_PRESENT_MODE_FIFO_KHR;
 }
 
-void Window::chooseSwapExtent() {
+void Seele::Vulkan::Window::chooseSwapExtent() {
     if (capabilities.currentExtent.width != std::numeric_limits<uint32>::max()) {
         extent = capabilities.currentExtent;
         return;
@@ -274,7 +349,7 @@ void Window::chooseSwapExtent() {
     extent.height = std::clamp(extent.height, capabilities.minImageExtent.height, capabilities.maxImageExtent.height);
 }
 
-void Window::createSwapChain() {
+void Seele::Vulkan::Window::createSwapChain() {
     graphics->waitDeviceIdle();
     uint32 imageCount = Gfx::numFramesBuffered;
     VkSwapchainCreateInfoKHR createInfo = {

src/Engine/Graphics/slang-compile.cpp

@@ -1,6 +1,7 @@
 #include "slang-compile.h"
 #include "Containers/Array.h"
 #include "Graphics/Descriptor.h"
+#include <filesystem>
 #include <fmt/core.h>
 #include <iostream>
 #include <slang.h>
@@ -27,9 +28,56 @@ thread_local Slang::ComPtr<slang::IComponentType> specializedComponent;
 thread_local Slang::ComPtr<slang::ISession> session;
 thread_local Array<std::string> entryPoints;
 
+namespace {
+std::filesystem::path getExecutableDirectory() {
+    std::error_code error;
+    auto exePath = std::filesystem::read_symlink("/proc/self/exe", error);
+    if (!error) {
+        return exePath.parent_path();
+    }
+    return std::filesystem::current_path();
+}
+
+std::filesystem::path findExistingDirectory(std::initializer_list<std::filesystem::path> candidates) {
+    for (const auto& candidate : candidates) {
+        std::error_code error;
+        if (std::filesystem::exists(candidate, error) && std::filesystem::is_directory(candidate, error)) {
+            return candidate;
+        }
+    }
+    return {};
+}
+
+void configureDownstreamCompilers(slang::IGlobalSession* session) {
+    const auto executableDirectory = getExecutableDirectory();
+    const auto currentDirectory = std::filesystem::current_path();
+    const auto glslangDirectory = findExistingDirectory({
+        executableDirectory / "Seele",
+        executableDirectory / "vcpkg_installed" / "x64-linux" / "lib",
+        currentDirectory / "Seele",
+        currentDirectory / "vcpkg_installed" / "x64-linux" / "lib",
+    });
+
+    if (!glslangDirectory.empty()) {
+        const std::string path = glslangDirectory.string();
+        session->setDownstreamCompilerPath(SLANG_PASS_THROUGH_GLSLANG, path.c_str());
+        session->setDownstreamCompilerPath(SLANG_PASS_THROUGH_SPIRV_OPT, path.c_str());
+        session->setDownstreamCompilerPath(SLANG_PASS_THROUGH_SPIRV_DIS, path.c_str());
+    }
+
+    // Avoid optional SPIR-V downstream tools that are often unavailable in RenderDoc launch environments.
+    session->setDefaultDownstreamCompiler(SLANG_SOURCE_LANGUAGE_SPIRV, SLANG_PASS_THROUGH_NONE);
+    session->setDownstreamCompilerForTransition(SLANG_SPIRV, SLANG_SPIRV, SLANG_PASS_THROUGH_NONE);
+    session->setDownstreamCompilerForTransition(SLANG_SPIRV, SLANG_SPIRV_ASM, SLANG_PASS_THROUGH_NONE);
+}
+}
+
 void Seele::beginCompilation(const ShaderCompilationInfo& info, SlangCompileTarget target, Gfx::PPipelineLayout layout) {
     if (!globalSession) {
-        slang::createGlobalSession(globalSession.writeRef());
+        SlangGlobalSessionDesc sessionDesc = {};
+        sessionDesc.enableGLSL = true;
+        slang::createGlobalSession(&sessionDesc, globalSession.writeRef());
+        configureDownstreamCompilers(globalSession);
     }
     slang::SessionDesc sessionDesc;
     sessionDesc.flags = 0;
@@ -42,6 +90,30 @@ void Seele::beginCompilation(const ShaderCompilationInfo& info, SlangCompileTarg
                     .intValue0 = info.dumpIntermediate,
                 },
         },
+        {
+            .name = slang::CompilerOptionName::Optimization,
+            .value =
+                {
+                    .kind = slang::CompilerOptionValueKind::Int,
+                    .intValue0 = SLANG_OPTIMIZATION_LEVEL_NONE,
+                },
+        },
+        {
+            .name = slang::CompilerOptionName::SkipSPIRVValidation,
+            .value =
+                {
+                    .kind = slang::CompilerOptionValueKind::Int,
+                    .intValue0 = 1,
+                },
+        },
+        {
+            .name = slang::CompilerOptionName::SkipDownstreamLinking,
+            .value =
+                {
+                    .kind = slang::CompilerOptionValueKind::Int,
+                    .intValue0 = 1,
+                },
+        },
     };
 
     sessionDesc.compilerOptionEntries = option.data();