Add boilerplate code for vulkan unit tests

Vulkan unit tests require a basic vulkan application to run. This adds
the boilerplate code for a simple vulkan application.

Bug: 388189326
Flag: EXEMPT test
Test: atest libvulkan_test
Change-Id: I59e2240b4c34b39af9b7f5927cb23f0926e4cf8a
diff --git a/vulkan/tests/Android.bp b/vulkan/tests/Android.bp
new file mode 100644
index 0000000..551d9b7
--- /dev/null
+++ b/vulkan/tests/Android.bp
@@ -0,0 +1,56 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_native_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_native_license"],
+}
+
+cc_test {
+    name: "libvulkan_test",
+    test_suites: ["general-tests"],
+
+    srcs: [
+        "libvulkan_test.cpp",
+    ],
+
+    strip: {
+        none: true,
+    },
+
+    cflags: [
+        "-DVK_USE_PLATFORM_ANDROID_KHR",
+        "-Wall",
+        "-Werror",
+    ],
+
+    header_libs: [
+        "hwvulkan_headers",
+        "vulkan_headers",
+    ],
+
+    cppflags: [
+        "-Wno-c++98-compat-pedantic",
+        "-Wno-c99-extensions",
+        "-Wno-exit-time-destructors",
+        "-Wno-float-equal",
+        "-Wno-global-constructors",
+        "-Wno-zero-length-array",
+    ],
+
+    shared_libs: [
+        "libbase",
+        "libgraphicsenv",
+        "liblog",
+        "libmediandk",
+        "libvulkan",
+    ],
+
+    static_libs: [
+        "libgmock",
+        "libgtest",
+        "liblog",
+    ],
+
+}
diff --git a/vulkan/tests/README.md b/vulkan/tests/README.md
new file mode 100644
index 0000000..3c9b66c
--- /dev/null
+++ b/vulkan/tests/README.md
@@ -0,0 +1,24 @@
+#libvulkan_test
+
+This binary contains the unit tests for testing libvulkan (The Vulkan Loader).
+
+These tests rely on the underlying GPU driver to be able to successfully create a valid
+swapchain. These tests are design to run on an Android emulator to give us a consistent GPU
+driver to test against. YMMV when running this on a physical device with an arbitrary GPU
+driver.
+
+To run these tests run:
+```
+atest libvulkan_test
+```
+
+If using an acloud device the full command list for the root of a freshly cloned repo would be:
+```
+source build/envsetup.sh
+lunch aosp_cf_x86_64_phone-trunk_staging-eng
+m
+acloud create --local-image
+atest libvulkan_test
+```
+
+
diff --git a/vulkan/tests/libvulkan_test.cpp b/vulkan/tests/libvulkan_test.cpp
new file mode 100644
index 0000000..128d640
--- /dev/null
+++ b/vulkan/tests/libvulkan_test.cpp
@@ -0,0 +1,360 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android/log.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <media/NdkImageReader.h>
+#include <vulkan/vulkan.h>
+
+#define LOGI(...) \
+    __android_log_print(ANDROID_LOG_INFO, "libvulkan_test", __VA_ARGS__)
+#define LOGE(...) \
+    __android_log_print(ANDROID_LOG_ERROR, "libvulkan_test", __VA_ARGS__)
+
+#define VK_CHECK(result) ASSERT_EQ(VK_SUCCESS, result)
+
+namespace android {
+
+class AImageReaderVulkanSwapchainTest : public ::testing::Test {
+   public:
+    AImageReaderVulkanSwapchainTest() {}
+
+    AImageReader* mReader = nullptr;
+    ANativeWindow* mWindow = nullptr;
+    VkInstance mVkInstance = VK_NULL_HANDLE;
+    VkPhysicalDevice mPhysicalDev = VK_NULL_HANDLE;
+    VkDevice mDevice = VK_NULL_HANDLE;
+    VkSurfaceKHR mSurface = VK_NULL_HANDLE;
+    VkQueue mPresentQueue = VK_NULL_HANDLE;
+    uint32_t mPresentQueueFamily = UINT32_MAX;
+    VkSwapchainKHR mSwapchain = VK_NULL_HANDLE;
+
+    void SetUp() override {}
+
+    void TearDown() override {}
+
+    // ------------------------------------------------------
+    // Helper methods
+    // ------------------------------------------------------
+
+    void createVulkanInstance(std::vector<const char*>& layers) {
+        const char* extensions[] = {
+            VK_KHR_SURFACE_EXTENSION_NAME,
+            VK_KHR_ANDROID_SURFACE_EXTENSION_NAME,
+            VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME,
+        };
+
+        VkApplicationInfo appInfo{};
+        appInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
+        appInfo.pApplicationName = "AImageReader Vulkan Swapchain Test";
+        appInfo.applicationVersion = 1;
+        appInfo.pEngineName = "TestEngine";
+        appInfo.engineVersion = 1;
+        appInfo.apiVersion = VK_API_VERSION_1_0;
+
+        VkInstanceCreateInfo instInfo{};
+        instInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
+        instInfo.pApplicationInfo = &appInfo;
+        instInfo.enabledExtensionCount =
+            sizeof(extensions) / sizeof(extensions[0]);
+        instInfo.ppEnabledExtensionNames = extensions;
+        instInfo.enabledLayerCount = layers.size();
+        instInfo.ppEnabledLayerNames = layers.data();
+        VkResult res = vkCreateInstance(&instInfo, nullptr, &mVkInstance);
+        VK_CHECK(res);
+        LOGE("Vulkan instance created");
+    }
+
+    void createAImageReader(int width, int height, int format, int maxImages) {
+        media_status_t status =
+            AImageReader_new(width, height, format, maxImages, &mReader);
+        ASSERT_EQ(AMEDIA_OK, status) << "Failed to create AImageReader";
+        ASSERT_NE(nullptr, mReader) << "AImageReader is null";
+
+        // Optionally set a listener
+        AImageReader_ImageListener listener{};
+        listener.context = this;
+        listener.onImageAvailable =
+            &AImageReaderVulkanSwapchainTest::onImageAvailable;
+        AImageReader_setImageListener(mReader, &listener);
+
+        LOGI("AImageReader created with %dx%d, format=%d", width, height,
+             format);
+    }
+
+    void getANativeWindowFromReader() {
+        ASSERT_NE(nullptr, mReader);
+
+        media_status_t status = AImageReader_getWindow(mReader, &mWindow);
+        ASSERT_EQ(AMEDIA_OK, status)
+            << "Failed to get ANativeWindow from AImageReader";
+        ASSERT_NE(nullptr, mWindow) << "ANativeWindow is null";
+        LOGI("ANativeWindow obtained from AImageReader");
+    }
+
+    void createVulkanSurface() {
+        ASSERT_NE((VkInstance)VK_NULL_HANDLE, mVkInstance);
+        ASSERT_NE((ANativeWindow*)nullptr, mWindow);
+
+        VkAndroidSurfaceCreateInfoKHR surfaceCreateInfo{};
+        surfaceCreateInfo.sType =
+            VK_STRUCTURE_TYPE_ANDROID_SURFACE_CREATE_INFO_KHR;
+        surfaceCreateInfo.window = mWindow;
+
+        VkResult res = vkCreateAndroidSurfaceKHR(
+            mVkInstance, &surfaceCreateInfo, nullptr, &mSurface);
+        VK_CHECK(res);
+        LOGI("Vulkan surface created from ANativeWindow");
+    }
+
+    void pickPhysicalDeviceAndQueueFamily() {
+        ASSERT_NE((VkInstance)VK_NULL_HANDLE, mVkInstance);
+
+        uint32_t deviceCount = 0;
+        vkEnumeratePhysicalDevices(mVkInstance, &deviceCount, nullptr);
+        ASSERT_GT(deviceCount, 0U) << "No Vulkan physical devices found!";
+
+        std::vector<VkPhysicalDevice> devices(deviceCount);
+        vkEnumeratePhysicalDevices(mVkInstance, &deviceCount, devices.data());
+
+        for (auto& dev : devices) {
+            uint32_t queueFamilyCount = 0;
+            vkGetPhysicalDeviceQueueFamilyProperties(dev, &queueFamilyCount,
+                                                     nullptr);
+            std::vector<VkQueueFamilyProperties> queueProps(queueFamilyCount);
+            vkGetPhysicalDeviceQueueFamilyProperties(dev, &queueFamilyCount,
+                                                     queueProps.data());
+
+            for (uint32_t i = 0; i < queueFamilyCount; i++) {
+                VkBool32 support = VK_FALSE;
+                vkGetPhysicalDeviceSurfaceSupportKHR(dev, i, mSurface,
+                                                     &support);
+                if (support == VK_TRUE) {
+                    // Found a queue family that can present
+                    mPhysicalDev = dev;
+                    mPresentQueueFamily = i;
+
+                    LOGI(
+                        "Physical device found with queue family %u supporting "
+                        "present",
+                        i);
+                    return;
+                }
+            }
+        }
+
+        FAIL()
+            << "No physical device found that supports present to the surface!";
+    }
+
+    void createDeviceAndGetQueue(std::vector<const char*>& layers) {
+        ASSERT_NE((void*)VK_NULL_HANDLE, mPhysicalDev);
+        ASSERT_NE(UINT32_MAX, mPresentQueueFamily);
+
+        float queuePriority = 1.0f;
+        VkDeviceQueueCreateInfo queueInfo{};
+        queueInfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
+        queueInfo.queueFamilyIndex = mPresentQueueFamily;
+        queueInfo.queueCount = 1;
+        queueInfo.pQueuePriorities = &queuePriority;
+
+        VkDeviceCreateInfo deviceInfo{};
+        deviceInfo.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
+        deviceInfo.queueCreateInfoCount = 1;
+        deviceInfo.pQueueCreateInfos = &queueInfo;
+        deviceInfo.enabledLayerCount = layers.size();
+        deviceInfo.ppEnabledLayerNames = layers.data();
+
+        const char* extensions[] = {
+            VK_KHR_SWAPCHAIN_EXTENSION_NAME,
+        };
+        deviceInfo.enabledExtensionCount =
+            sizeof(extensions) / sizeof(extensions[0]);
+        deviceInfo.ppEnabledExtensionNames = extensions;
+
+        VkResult res =
+            vkCreateDevice(mPhysicalDev, &deviceInfo, nullptr, &mDevice);
+        VK_CHECK(res);
+        LOGI("Logical device created");
+
+        vkGetDeviceQueue(mDevice, mPresentQueueFamily, 0, &mPresentQueue);
+        ASSERT_NE((VkQueue)VK_NULL_HANDLE, mPresentQueue);
+        LOGI("Acquired present-capable queue");
+    }
+
+    void createSwapchain() {
+        ASSERT_NE((VkDevice)VK_NULL_HANDLE, mDevice);
+        ASSERT_NE((VkSurfaceKHR)VK_NULL_HANDLE, mSurface);
+
+        VkSurfaceCapabilitiesKHR surfaceCaps{};
+        VK_CHECK(vkGetPhysicalDeviceSurfaceCapabilitiesKHR(
+            mPhysicalDev, mSurface, &surfaceCaps));
+
+        uint32_t formatCount = 0;
+        vkGetPhysicalDeviceSurfaceFormatsKHR(mPhysicalDev, mSurface,
+                                             &formatCount, nullptr);
+        ASSERT_GT(formatCount, 0U);
+        std::vector<VkSurfaceFormatKHR> formats(formatCount);
+        vkGetPhysicalDeviceSurfaceFormatsKHR(mPhysicalDev, mSurface,
+                                             &formatCount, formats.data());
+
+        VkSurfaceFormatKHR chosenFormat = formats[0];
+        LOGI("Chosen surface format: %d", chosenFormat.format);
+
+        uint32_t presentModeCount = 0;
+        vkGetPhysicalDeviceSurfacePresentModesKHR(mPhysicalDev, mSurface,
+                                                  &presentModeCount, nullptr);
+        ASSERT_GT(presentModeCount, 0U);
+        std::vector<VkPresentModeKHR> presentModes(presentModeCount);
+        vkGetPhysicalDeviceSurfacePresentModesKHR(
+            mPhysicalDev, mSurface, &presentModeCount, presentModes.data());
+
+        VkPresentModeKHR chosenPresentMode = VK_PRESENT_MODE_FIFO_KHR;
+        for (auto mode : presentModes) {
+            if (mode == VK_PRESENT_MODE_FIFO_KHR) {
+                chosenPresentMode = mode;
+                break;
+            }
+        }
+        LOGI("Chosen present mode: %d", chosenPresentMode);
+
+        VkExtent2D swapchainExtent{};
+        if (surfaceCaps.currentExtent.width == 0xFFFFFFFF) {
+            swapchainExtent.width = 640;   // fallback
+            swapchainExtent.height = 480;  // fallback
+        } else {
+            swapchainExtent = surfaceCaps.currentExtent;
+        }
+        LOGI("Swapchain extent: %d x %d", swapchainExtent.width,
+             swapchainExtent.height);
+
+        uint32_t desiredImageCount = surfaceCaps.minImageCount + 1;
+        if (surfaceCaps.maxImageCount > 0 &&
+            desiredImageCount > surfaceCaps.maxImageCount) {
+            desiredImageCount = surfaceCaps.maxImageCount;
+        }
+
+        VkSwapchainCreateInfoKHR swapchainInfo{};
+        swapchainInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
+        swapchainInfo.surface = mSurface;
+        swapchainInfo.minImageCount = desiredImageCount;
+        swapchainInfo.imageFormat = chosenFormat.format;
+        swapchainInfo.imageColorSpace = chosenFormat.colorSpace;
+        swapchainInfo.imageExtent = swapchainExtent;
+        swapchainInfo.imageArrayLayers = 1;
+        swapchainInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT |
+                                   VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
+        swapchainInfo.preTransform = surfaceCaps.currentTransform;
+        swapchainInfo.compositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR;
+        swapchainInfo.presentMode = chosenPresentMode;
+        swapchainInfo.clipped = VK_TRUE;
+        swapchainInfo.oldSwapchain = VK_NULL_HANDLE;
+
+        uint32_t queueFamilyIndices[] = {mPresentQueueFamily};
+        swapchainInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
+        swapchainInfo.queueFamilyIndexCount = 1;
+        swapchainInfo.pQueueFamilyIndices = queueFamilyIndices;
+
+        VkResult res =
+            vkCreateSwapchainKHR(mDevice, &swapchainInfo, nullptr, &mSwapchain);
+        VK_CHECK(res);
+        LOGI("Swapchain created successfully");
+
+        uint32_t swapchainImageCount = 0;
+        vkGetSwapchainImagesKHR(mDevice, mSwapchain, &swapchainImageCount,
+                                nullptr);
+        std::vector<VkImage> swapchainImages(swapchainImageCount);
+        vkGetSwapchainImagesKHR(mDevice, mSwapchain, &swapchainImageCount,
+                                swapchainImages.data());
+
+        LOGI("Swapchain has %u images", swapchainImageCount);
+    }
+
+    // Image available callback (AImageReader)
+    static void onImageAvailable(void*, AImageReader* reader) {
+        LOGI("onImageAvailable callback triggered");
+        AImage* image = nullptr;
+        media_status_t status = AImageReader_acquireLatestImage(reader, &image);
+        if (status != AMEDIA_OK || !image) {
+            LOGE("Failed to acquire latest image");
+            return;
+        }
+        AImage_delete(image);
+        LOGI("Released acquired image");
+    }
+
+    void cleanUpSwapchainForTest() {
+        if (mSwapchain != VK_NULL_HANDLE) {
+            vkDestroySwapchainKHR(mDevice, mSwapchain, nullptr);
+            mSwapchain = VK_NULL_HANDLE;
+        }
+        if (mDevice != VK_NULL_HANDLE) {
+            vkDestroyDevice(mDevice, nullptr);
+            mDevice = VK_NULL_HANDLE;
+        }
+        if (mSurface != VK_NULL_HANDLE) {
+            vkDestroySurfaceKHR(mVkInstance, mSurface, nullptr);
+            mSurface = VK_NULL_HANDLE;
+        }
+        if (mVkInstance != VK_NULL_HANDLE) {
+            vkDestroyInstance(mVkInstance, nullptr);
+            mVkInstance = VK_NULL_HANDLE;
+        }
+        if (mReader) {
+            // AImageReader_delete(mReader);
+            mReader = nullptr;
+        }
+        // Note: The ANativeWindow from AImageReader is implicitly
+        // managed by the reader, so we don't explicitly delete it.
+        mWindow = nullptr;
+    }
+
+    void buildSwapchianForTest(std::vector<const char*>& instanceLayers,
+                               std::vector<const char*>& deviceLayers) {
+        createVulkanInstance(instanceLayers);
+
+        // the "atest libvulkan_test" command will execute this test as a binary
+        // (not apk) on the device. Consequently we can't render to the screen
+        // and need to work around this by using AImageReader*
+        createAImageReader(640, 480, AIMAGE_FORMAT_PRIVATE, 3);
+        getANativeWindowFromReader();
+        createVulkanSurface();
+        pickPhysicalDeviceAndQueueFamily();
+
+        createDeviceAndGetQueue(deviceLayers);
+        createSwapchain();
+    }
+};
+
+TEST_F(AImageReaderVulkanSwapchainTest, TestHelperMethods) {
+    // Verify that the basic plumbing/helper functions of these tests is
+    // working. This doesn't directly test any of the layer code. It only
+    // verifies that we can successfully create a swapchain with an AImageReader
+
+    std::vector<const char*> instanceLayers;
+    std::vector<const char*> deviceLayers;
+    buildSwapchianForTest(deviceLayers, instanceLayers);
+
+    ASSERT_NE(mVkInstance, (VkInstance)VK_NULL_HANDLE);
+    ASSERT_NE(mPhysicalDev, (VkPhysicalDevice)VK_NULL_HANDLE);
+    ASSERT_NE(mDevice, (VkDevice)VK_NULL_HANDLE);
+    ASSERT_NE(mSurface, (VkSurfaceKHR)VK_NULL_HANDLE);
+    ASSERT_NE(mSwapchain, (VkSwapchainKHR)VK_NULL_HANDLE);
+    cleanUpSwapchainForTest();
+}
+
+}  // namespace android