[Feat] (MG_Test/Backend/DirectVulkan): some sanity tests

MobileGL/MG_Test/Backend/DirectVulkan/CMakeLists.txt

@@ -0,0 +1,37 @@
+cmake_minimum_required(VERSION 3.14)
+
+message(STATUS "Generating build files for MobileGL DirectVulkan Integration Test...")
+
+add_executable(
+        DirectVulkanSanityTest
+        SanityTest.cpp
+)
+
+target_include_directories(DirectVulkanSanityTest PRIVATE
+        ${MGL_ROOT}/include
+        ${MGL_ROOT}/MobileGL
+)
+
+if (WIN32)
+    # I know this is horrible, but glfw only provides binary but not CMake config for Windows, so we have to manually link against the library and include directories
+    #set(GLFW_ROOT path/to/glfw-3.4.bin.WIN64)
+    target_include_directories(DirectVulkanSanityTest PRIVATE ${GLFW_ROOT}/include)
+    target_link_directories(DirectVulkanSanityTest PRIVATE ${GLFW_ROOT}/lib-vc2022)
+    target_link_libraries(DirectVulkanSanityTest PRIVATE glfw3_mt.lib) 
+else()
+    find_package(glfw3 REQUIRED)
+    target_link_libraries(DirectVulkanSanityTest PRIVATE glfw)
+endif()
+
+find_package(Vulkan REQUIRED)
+target_include_directories(DirectVulkanSanityTest PUBLIC ${Vulkan_INCLUDE_DIRS})
+target_link_libraries(DirectVulkanSanityTest PRIVATE Vulkan::Vulkan)
+
+target_link_libraries(
+        DirectVulkanSanityTest PRIVATE
+        GTest::gtest_main
+        ${LINK_LIBRARIES}
+)
+
+include(GoogleTest)
+gtest_discover_tests(DirectVulkanSanityTest)

MobileGL/MG_Test/Backend/DirectVulkan/SanityTest.cpp

@@ -0,0 +1,82 @@
+// MobileGL - MobileGL/MG_Test/Backend/DirectVulkan/SanityTest.cpp
+// Copyright (c) 2025-2026 MobileGL-Dev
+// Licensed under the GNU Lesser General Public License v3.0:
+//   https://www.gnu.org/licenses/gpl-3.0.txt
+//   https://www.gnu.org/licenses/lgpl-3.0.txt
+// SPDX-License-Identifier: LGPL-3.0-only
+// End of Source File Header
+
+#include <gtest/gtest.h>
+#include <iostream>
+#include <vector>
+
+#include <vulkan/vulkan.h>
+TEST(DirectVulkanSanity, ExtensionEnumeration) {
+    uint32_t extensionCount = 0;
+    vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, nullptr);
+
+    std::cout << extensionCount << " extensions supported\n";
+
+    std::vector<VkExtensionProperties> extensions(extensionCount);
+    vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, extensions.data());
+
+    for(const auto& extension : extensions) {
+        std::cout << extension.extensionName
+                  << " (r." << extension.specVersion << ")\n";
+    }
+}
+
+#include <GLFW/glfw3.h>
+TEST(DirectVulkanSanity, WindowCreation) {
+    glfwInit();
+
+    glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
+    GLFWwindow* window = glfwCreateWindow(800, 600, "MobileGL WindowCreation", nullptr, nullptr);
+
+    while(!glfwWindowShouldClose(window)) {
+        glfwPollEvents();
+    }
+
+    glfwDestroyWindow(window);
+
+    glfwTerminate();
+}
+
+#define EGLAPI
+#include <EGL/egl.h>
+#ifdef _WIN32
+    #define GLFW_EXPOSE_NATIVE_WIN32
+#endif
+#include <GLFW/glfw3native.h>
+TEST(DirectVulkanSanity, ContextCreation) {
+    glfwInit();
+
+    static EGLint const attribute_list[] = {
+        EGL_RED_SIZE, 8,
+        EGL_GREEN_SIZE, 8,
+        EGL_BLUE_SIZE, 8,
+        EGL_NONE
+    };
+
+    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    eglInitialize(display, nullptr, nullptr);
+    EGLConfig config;
+    EGLint num_config;
+    eglChooseConfig(display, attribute_list, &config, 1, &num_config);
+    EGLContext context = eglCreateContext(display, config, EGL_NO_CONTEXT, nullptr);
+
+    glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
+    GLFWwindow* window = glfwCreateWindow(800, 600, "MobileGL ContextCreation", nullptr, nullptr);
+#ifdef _WIN32
+    EGLNativeWindowType nativewindow = glfwGetWin32Window(window);
+#endif
+    EGLSurface surface = eglCreateWindowSurface(display, config, nativewindow, nullptr);
+
+    while(!glfwWindowShouldClose(window)) {
+        glfwPollEvents();
+    }
+
+    glfwDestroyWindow(window);
+
+    glfwTerminate();
+}

MobileGL/MG_Test/CMakeLists.txt

@@ -61,3 +61,6 @@ gtest_discover_tests(SanityTest)
 add_subdirectory(Buffer)
 add_subdirectory(VertexArray)
 add_subdirectory(Program)
+if (ENABLE_INTEGRATION_TESTS)
+    add_subdirectory(Backend/DirectVulkan)
+endif()