GrVkGpu initialization cleanup.

src/gpu/vk/GrVkBackendContext.cpp

Index: src/gpu/vk/GrVkBackendContext.cpp
diff --git a/src/gpu/vk/GrVkBackendContext.cpp b/src/gpu/vk/GrVkBackendContext.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c169c620a133787fe022420ccdc788e8942d7bc0
--- /dev/null
+++ b/src/gpu/vk/GrVkBackendContext.cpp
@@ -0,0 +1,252 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "vk/GrVkBackendContext.h"
+#include "vk/GrVkInterface.h"
+#include "vk/GrVkUtil.h"
+
+////////////////////////////////////////////////////////////////////////////////
+// Helper code to set up Vulkan context objects
+
+#ifdef ENABLE_VK_LAYERS
+const char* kEnabledLayerNames[] = {
+    // elements of VK_LAYER_LUNARG_standard_validation
+    "VK_LAYER_LUNARG_threading",
+    "VK_LAYER_LUNARG_param_checker",
+    "VK_LAYER_LUNARG_device_limits",
+    "VK_LAYER_LUNARG_object_tracker",
+    "VK_LAYER_LUNARG_image",
+    "VK_LAYER_LUNARG_mem_tracker",
+    "VK_LAYER_LUNARG_draw_state",
+    "VK_LAYER_LUNARG_swapchain",
+    "VK_LAYER_GOOGLE_unique_objects",
+    // not included in standard_validation
+    //"VK_LAYER_LUNARG_api_dump",
+};
+const char* kEnabledInstanceExtensionNames[] = {
+    VK_EXT_DEBUG_REPORT_EXTENSION_NAME
+};
+
+bool verify_instance_layers() {
+    // make sure we can actually use the extensions and layers above
+    uint32_t extensionCount;
+    VkResult res = vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, nullptr);
+    if (VK_SUCCESS != res) {
+        return false;
+    }
+    VkExtensionProperties* extensions = new VkExtensionProperties[extensionCount];
+    res = vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, extensions);
+    if (VK_SUCCESS != res) {
+        return false;
+    }
+    int instanceExtensionsFound = 0;
+    for (uint32_t j = 0; j < ARRAYSIZE(kEnabledInstanceExtensionNames); ++j) {
+        for (uint32_t i = 0; i < extensionCount; ++i) {
+            if (!strncmp(extensions[i].extensionName, kEnabledInstanceExtensionNames[j],
+                         strlen(kEnabledInstanceExtensionNames[j]))) {
+                ++instanceExtensionsFound;
+                break;
+            }
+        }
+    }
+    delete[] extensions;
+
+    uint32_t layerCount;
+    res = vkEnumerateInstanceLayerProperties(&layerCount, nullptr);
+    if (VK_SUCCESS != res) {
+        return false;
+    }
+    VkLayerProperties* layers = new VkLayerProperties[layerCount];
+    res = vkEnumerateInstanceLayerProperties(&layerCount, layers);
+    if (VK_SUCCESS != res) {
+        return false;
+    }
+    int instanceLayersFound = 0;
+    for (uint32_t j = 0; j < ARRAYSIZE(kEnabledLayerNames); ++j) {
+        for (uint32_t i = 0; i < layerCount; ++i) {
+            if (!strncmp(layers[i].layerName, kEnabledLayerNames[j],
+                         strlen(kEnabledLayerNames[j]))) {
+                ++instanceLayersFound;
+                break;
+            }
+        }
+    }
+    delete[] layers;
+
+    return instanceExtensionsFound == ARRAYSIZE(kEnabledInstanceExtensionNames) &&
+           instanceLayersFound == ARRAYSIZE(kEnabledLayerNames);
+}
+
+bool verify_device_layers(VkPhysicalDevice physDev) {
+    uint32_t layerCount;
+    VkResult res = vkEnumerateDeviceLayerProperties(physDev, &layerCount, nullptr);
+    if (VK_SUCCESS != res) {
+        return false;
+    }
+    VkLayerProperties* layers = new VkLayerProperties[layerCount];
+    res = vkEnumerateDeviceLayerProperties(physDev, &layerCount, layers);
+    if (VK_SUCCESS != res) {
+        return false;
+    }
+    int deviceLayersFound = 0;
+    for (uint32_t j = 0; j < ARRAYSIZE(kEnabledLayerNames); ++j) {
+        for (uint32_t i = 0; i < layerCount; ++i) {
+            if (!strncmp(layers[i].layerName, kEnabledLayerNames[j],
+                         strlen(kEnabledLayerNames[j]))) {
+                ++deviceLayersFound;
+                break;
+            }
+        }
+    }
+    delete[] layers;
+
+    return deviceLayersFound == ARRAYSIZE(kEnabledLayerNames);
+}
+#endif
+
+// Create the base Vulkan objects needed by the GrVkGpu object
+const GrVkBackendContext* GrVkBackendContext::Create() {
+    VkPhysicalDevice physDev;
+    VkDevice device;
+    VkInstance inst;
+    VkResult err;
+
+    const VkApplicationInfo app_info = {
+        VK_STRUCTURE_TYPE_APPLICATION_INFO, // sType
+        nullptr,                            // pNext
+        "vktest",                           // pApplicationName
+        0,                                  // applicationVersion
+        "vktest",                           // pEngineName
+        0,                                  // engineVerison
+        kGrVkMinimumVersion,                // apiVersion
+    };
+
+    const char** enabledLayerNames = nullptr;
+    int enabledLayerCount = 0;
+    const char** enabledInstanceExtensionNames = nullptr;
+    int enabledInstanceExtensionCount = 0;
+#ifdef ENABLE_VK_LAYERS
+    if (verify_instance_layers()) {
+        enabledLayerNames = kEnabledLayerNames;
+        enabledLayerCount = ARRAYSIZE(kEnabledLayerNames);
+        enabledInstanceExtensionNames = kEnabledInstanceExtensionNames;
+        enabledInstanceExtensionCount = ARRAYSIZE(kEnabledInstanceExtensionNames);
+    }
+#endif
+
+    const VkInstanceCreateInfo instance_create = {
+        VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO, // sType
+        nullptr,                                // pNext
+        0,                                      // flags
+        &app_info,                              // pApplicationInfo
+        enabledLayerCount,                      // enabledLayerNameCount
+        enabledLayerNames,                      // ppEnabledLayerNames
+        enabledInstanceExtensionCount,          // enabledExtensionNameCount
+        enabledInstanceExtensionNames,          // ppEnabledExtensionNames
+    };
+
+    err = vkCreateInstance(&instance_create, nullptr, &inst);
+    if (err < 0) {
+        SkDebugf("vkCreateInstance failed: %d\n", err);
+        SkFAIL("failing");
+    }
+
+    uint32_t gpuCount;
+    err = vkEnumeratePhysicalDevices(inst, &gpuCount, nullptr);
+    if (err) {
+        SkDebugf("vkEnumeratePhysicalDevices failed: %d\n", err);
+        SkFAIL("failing");
+    }
+    SkASSERT(gpuCount > 0);
+    // Just returning the first physical device instead of getting the whole array.
+    // TODO: find best match for our needs
+    gpuCount = 1;
+    err = vkEnumeratePhysicalDevices(inst, &gpuCount, &physDev);
+    if (err) {
+        SkDebugf("vkEnumeratePhysicalDevices failed: %d\n", err);
+        SkFAIL("failing");
+    }
+
+    // query to get the initial queue props size
+    uint32_t queueCount;
+    vkGetPhysicalDeviceQueueFamilyProperties(physDev, &queueCount, nullptr);
+    SkASSERT(queueCount >= 1);
+
+    SkAutoMalloc queuePropsAlloc(queueCount * sizeof(VkQueueFamilyProperties));
+    // now get the actual queue props
+    VkQueueFamilyProperties* queueProps = (VkQueueFamilyProperties*)queuePropsAlloc.get();
+
+    vkGetPhysicalDeviceQueueFamilyProperties(physDev, &queueCount, queueProps);
+
+    // iterate to find the graphics queue
+    uint32_t graphicsQueueIndex = -1;
+    for (uint32_t i = 0; i < queueCount; i++) {
+        if (queueProps[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) {
+            graphicsQueueIndex = i;
+            break;
+        }
+    }
+    SkASSERT(graphicsQueueIndex < queueCount);
+
+#ifdef ENABLE_VK_LAYERS
+    // unlikely that the device will have different layers than the instance, but good to check
+    if (!verify_device_layers(physDev)) {
+        enabledLayerNames = nullptr;
+        enabledLayerCount = 0;
+    }
+#endif
+
+    float queuePriorities[1] = { 0.0 };
+    // Here we assume no need for swapchain queue
+    // If one is needed, the client will need its own setup code
+    const VkDeviceQueueCreateInfo queueInfo = {
+        VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, // sType
+        nullptr,                                    // pNext
+        0,                                          // VkDeviceQueueCreateFlags
+        graphicsQueueIndex,                         // queueFamilyIndex
+        1,                                          // queueCount
+        queuePriorities,                            // pQueuePriorities
+    };
+    const VkDeviceCreateInfo deviceInfo = {
+        VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,  // sType
+        nullptr,                               // pNext
+        0,                                     // VkDeviceCreateFlags
+        1,                                     // queueCreateInfoCount
+        &queueInfo,                            // pQueueCreateInfos
+        enabledLayerCount,                     // layerCount
+        enabledLayerNames,                     // ppEnabledLayerNames
+        0,                                     // extensionCount
+        nullptr,                               // ppEnabledExtensionNames
+        nullptr                                // ppEnabledFeatures
+    };
+
+    err = vkCreateDevice(physDev, &deviceInfo, nullptr, &device);
+    if (err) {
+        SkDebugf("CreateDevice failed: %d\n", err);
+        return nullptr;
+    }
+
+    VkQueue queue;
+    vkGetDeviceQueue(device, graphicsQueueIndex, 0, &queue);
+
+    GrVkBackendContext* ctx = new GrVkBackendContext();
+    ctx->fInstance = inst;
+    ctx->fPhysicalDevice = physDev;
+    ctx->fDevice = device;
+    ctx->fQueue = queue;
+    ctx->fQueueFamilyIndex = graphicsQueueIndex;
+    ctx->fInterface.reset(GrVkCreateInterface(inst, physDev, device));
+  
+    return ctx;
+}
+
+GrVkBackendContext::~GrVkBackendContext() {
+    vkDestroyDevice(fDevice, nullptr);
+    fDevice = VK_NULL_HANDLE;
+    vkDestroyInstance(fInstance, nullptr);
+    fInstance = VK_NULL_HANDLE;
+}