More refactoring for Viewer
* Move support files into sk_app and main files up to top directory
* Rename VulkanTestContext and create WindowContext parent class
* Place VulkanWindowContext et al. in sk_app namespace.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1944413005
Review-Url: https://codereview.chromium.org/1944413005
diff --git a/tools/viewer/sk_app/VulkanWindowContext.cpp b/tools/viewer/sk_app/VulkanWindowContext.cpp
new file mode 100644
index 0000000..8f5f420
--- /dev/null
+++ b/tools/viewer/sk_app/VulkanWindowContext.cpp
@@ -0,0 +1,571 @@
+
+/*
+ * 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 "GrContext.h"
+#include "SkSurface.h"
+#include "VulkanWindowContext.h"
+
+#include "vk/GrVkInterface.h"
+#include "vk/GrVkUtil.h"
+#include "vk/GrVkTypes.h"
+
+#ifdef VK_USE_PLATFORM_WIN32_KHR
+// windows wants to define this as CreateSemaphoreA or CreateSemaphoreW
+#undef CreateSemaphore
+#endif
+
+#define GET_PROC(F) f ## F = (PFN_vk ## F) vkGetInstanceProcAddr(instance, "vk" #F)
+#define GET_DEV_PROC(F) f ## F = (PFN_vk ## F) vkGetDeviceProcAddr(device, "vk" #F)
+
+namespace sk_app {
+
+VulkanWindowContext::VulkanWindowContext(void* platformData, int msaaSampleCount)
+ : fSurface(VK_NULL_HANDLE)
+ , fSwapchain(VK_NULL_HANDLE)
+ , fCommandPool(VK_NULL_HANDLE)
+ , fBackbuffers(nullptr) {
+
+ // any config code here (particularly for msaa)?
+
+ this->initializeContext(platformData);
+}
+
+void VulkanWindowContext::initializeContext(void* platformData) {
+
+ fBackendContext.reset(GrVkBackendContext::Create(&fPresentQueueIndex, canPresent));
+ if (!(fBackendContext->fExtensions & kKHR_surface_GrVkExtensionFlag) ||
+ !(fBackendContext->fExtensions & kKHR_swapchain_GrVkExtensionFlag)) {
+ fBackendContext.reset(nullptr);
+ return;
+ }
+
+ VkInstance instance = fBackendContext->fInstance;
+ VkDevice device = fBackendContext->fDevice;
+ GET_PROC(DestroySurfaceKHR);
+ GET_PROC(GetPhysicalDeviceSurfaceSupportKHR);
+ GET_PROC(GetPhysicalDeviceSurfaceCapabilitiesKHR);
+ GET_PROC(GetPhysicalDeviceSurfaceFormatsKHR);
+ GET_PROC(GetPhysicalDeviceSurfacePresentModesKHR);
+ GET_DEV_PROC(CreateSwapchainKHR);
+ GET_DEV_PROC(DestroySwapchainKHR);
+ GET_DEV_PROC(GetSwapchainImagesKHR);
+ GET_DEV_PROC(AcquireNextImageKHR);
+ GET_DEV_PROC(QueuePresentKHR);
+
+ fContext = GrContext::Create(kVulkan_GrBackend, (GrBackendContext) fBackendContext.get());
+
+ fSurface = createVkSurface(instance, platformData);
+ if (VK_NULL_HANDLE == fSurface) {
+ fBackendContext.reset(nullptr);
+ return;
+ }
+
+ VkBool32 supported;
+ VkResult res = fGetPhysicalDeviceSurfaceSupportKHR(fBackendContext->fPhysicalDevice,
+ fPresentQueueIndex, fSurface,
+ &supported);
+ if (VK_SUCCESS != res) {
+ this->destroyContext();
+ return;
+ }
+
+ if (!this->createSwapchain(-1, -1)) {
+ this->destroyContext();
+ return;
+ }
+
+ // create presentQueue
+ vkGetDeviceQueue(fBackendContext->fDevice, fPresentQueueIndex, 0, &fPresentQueue);
+}
+
+bool VulkanWindowContext::createSwapchain(uint32_t width, uint32_t height) {
+ // check for capabilities
+ VkSurfaceCapabilitiesKHR caps;
+ VkResult res = fGetPhysicalDeviceSurfaceCapabilitiesKHR(fBackendContext->fPhysicalDevice,
+ fSurface, &caps);
+ if (VK_SUCCESS != res) {
+ return false;
+ }
+
+ uint32_t surfaceFormatCount;
+ res = fGetPhysicalDeviceSurfaceFormatsKHR(fBackendContext->fPhysicalDevice, fSurface,
+ &surfaceFormatCount, nullptr);
+ if (VK_SUCCESS != res) {
+ return false;
+ }
+
+ SkAutoMalloc surfaceFormatAlloc(surfaceFormatCount * sizeof(VkSurfaceFormatKHR));
+ VkSurfaceFormatKHR* surfaceFormats = (VkSurfaceFormatKHR*)surfaceFormatAlloc.get();
+ res = fGetPhysicalDeviceSurfaceFormatsKHR(fBackendContext->fPhysicalDevice, fSurface,
+ &surfaceFormatCount, surfaceFormats);
+ if (VK_SUCCESS != res) {
+ return false;
+ }
+
+ uint32_t presentModeCount;
+ res = fGetPhysicalDeviceSurfacePresentModesKHR(fBackendContext->fPhysicalDevice, fSurface,
+ &presentModeCount, nullptr);
+ if (VK_SUCCESS != res) {
+ return false;
+ }
+
+ SkAutoMalloc presentModeAlloc(presentModeCount * sizeof(VkPresentModeKHR));
+ VkPresentModeKHR* presentModes = (VkPresentModeKHR*)presentModeAlloc.get();
+ res = fGetPhysicalDeviceSurfacePresentModesKHR(fBackendContext->fPhysicalDevice, fSurface,
+ &presentModeCount, presentModes);
+ if (VK_SUCCESS != res) {
+ return false;
+ }
+
+ VkExtent2D extent = caps.currentExtent;
+ // use the hints
+ if (extent.width == (uint32_t)-1) {
+ extent.width = width;
+ extent.height = height;
+ }
+
+ // clamp width; to protect us from broken hints
+ if (extent.width < caps.minImageExtent.width) {
+ extent.width = caps.minImageExtent.width;
+ } else if (extent.width > caps.maxImageExtent.width) {
+ extent.width = caps.maxImageExtent.width;
+ }
+ // clamp height
+ if (extent.height < caps.minImageExtent.height) {
+ extent.height = caps.minImageExtent.height;
+ } else if (extent.height > caps.maxImageExtent.height) {
+ extent.height = caps.maxImageExtent.height;
+ }
+ fWidth = (int)extent.width;
+ fHeight = (int)extent.height;
+
+ uint32_t imageCount = caps.minImageCount + 2;
+ if (caps.maxImageCount > 0 && imageCount > caps.maxImageCount) {
+ // Application must settle for fewer images than desired:
+ imageCount = caps.maxImageCount;
+ }
+
+ VkImageUsageFlags usageFlags = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT |
+ VK_IMAGE_USAGE_TRANSFER_SRC_BIT |
+ VK_IMAGE_USAGE_TRANSFER_DST_BIT;
+ SkASSERT((caps.supportedUsageFlags & usageFlags) == usageFlags);
+ SkASSERT(caps.supportedTransforms & caps.currentTransform);
+ SkASSERT(caps.supportedCompositeAlpha & (VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR |
+ VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR));
+ VkCompositeAlphaFlagBitsKHR composite_alpha =
+ (caps.supportedCompositeAlpha & VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR) ?
+ VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR :
+ VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
+
+ // Pick our surface format -- for now, the first one
+ VkFormat surfaceFormat = surfaceFormats[0].format;
+ VkColorSpaceKHR colorSpace = surfaceFormats[0].colorSpace;
+
+ // If mailbox mode is available, use it, as it is the lowest-latency non-
+ // tearing mode. If not, fall back to FIFO which is always available.
+ VkPresentModeKHR mode = VK_PRESENT_MODE_FIFO_KHR;
+ for (uint32_t i = 0; i < presentModeCount; ++i) {
+ // use mailbox
+ if (VK_PRESENT_MODE_MAILBOX_KHR == presentModes[i]) {
+ mode = presentModes[i];
+ break;
+ }
+ }
+
+ VkSwapchainCreateInfoKHR swapchainCreateInfo;
+ memset(&swapchainCreateInfo, 0, sizeof(VkSwapchainCreateInfoKHR));
+ swapchainCreateInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
+ swapchainCreateInfo.surface = fSurface;
+ swapchainCreateInfo.minImageCount = imageCount;
+ swapchainCreateInfo.imageFormat = surfaceFormat;
+ swapchainCreateInfo.imageColorSpace = colorSpace;
+ swapchainCreateInfo.imageExtent = extent;
+ swapchainCreateInfo.imageArrayLayers = 1;
+ swapchainCreateInfo.imageUsage = usageFlags;
+
+ uint32_t queueFamilies[] = { fBackendContext->fGraphicsQueueIndex, fPresentQueueIndex };
+ if (fBackendContext->fGraphicsQueueIndex != fPresentQueueIndex) {
+ swapchainCreateInfo.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
+ swapchainCreateInfo.queueFamilyIndexCount = 2;
+ swapchainCreateInfo.pQueueFamilyIndices = queueFamilies;
+ } else {
+ swapchainCreateInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
+ swapchainCreateInfo.queueFamilyIndexCount = 0;
+ swapchainCreateInfo.pQueueFamilyIndices = nullptr;
+ }
+
+ swapchainCreateInfo.preTransform = caps.currentTransform;;
+ swapchainCreateInfo.compositeAlpha = composite_alpha;
+ swapchainCreateInfo.presentMode = mode;
+ swapchainCreateInfo.clipped = true;
+ swapchainCreateInfo.oldSwapchain = fSwapchain;
+
+ res = fCreateSwapchainKHR(fBackendContext->fDevice, &swapchainCreateInfo, nullptr, &fSwapchain);
+ if (VK_SUCCESS != res) {
+ return false;
+ }
+
+ // destroy the old swapchain
+ if (swapchainCreateInfo.oldSwapchain != VK_NULL_HANDLE) {
+ GR_VK_CALL(fBackendContext->fInterface, DeviceWaitIdle(fBackendContext->fDevice));
+
+ this->destroyBuffers();
+
+ fDestroySwapchainKHR(fBackendContext->fDevice, swapchainCreateInfo.oldSwapchain, nullptr);
+ }
+
+ this->createBuffers(swapchainCreateInfo.imageFormat);
+
+ return true;
+}
+
+void VulkanWindowContext::createBuffers(VkFormat format) {
+ GrVkFormatToPixelConfig(format, &fPixelConfig);
+
+ fGetSwapchainImagesKHR(fBackendContext->fDevice, fSwapchain, &fImageCount, nullptr);
+ SkASSERT(fImageCount);
+ fImages = new VkImage[fImageCount];
+ fGetSwapchainImagesKHR(fBackendContext->fDevice, fSwapchain, &fImageCount, fImages);
+
+ // set up initial image layouts and create surfaces
+ fImageLayouts = new VkImageLayout[fImageCount];
+ fSurfaces = new sk_sp<SkSurface>[fImageCount];
+ for (uint32_t i = 0; i < fImageCount; ++i) {
+ fImageLayouts[i] = VK_IMAGE_LAYOUT_UNDEFINED;
+
+ GrBackendRenderTargetDesc desc;
+ GrVkTextureInfo info;
+ info.fImage = fImages[i];
+ info.fAlloc = VK_NULL_HANDLE;
+ info.fImageLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+ info.fImageTiling = VK_IMAGE_TILING_OPTIMAL;
+ info.fFormat = format;
+ desc.fWidth = fWidth;
+ desc.fHeight = fHeight;
+ desc.fConfig = fPixelConfig;
+ desc.fOrigin = kTopLeft_GrSurfaceOrigin;
+ desc.fSampleCnt = 0;
+ desc.fStencilBits = 0;
+ desc.fRenderTargetHandle = (GrBackendObject) &info;
+ SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
+ fSurfaces[i] = SkSurface::MakeFromBackendRenderTarget(fContext, desc, &props);
+ }
+
+ // create the command pool for the command buffers
+ if (VK_NULL_HANDLE == fCommandPool) {
+ VkCommandPoolCreateInfo commandPoolInfo;
+ memset(&commandPoolInfo, 0, sizeof(VkCommandPoolCreateInfo));
+ commandPoolInfo.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
+ // this needs to be on the render queue
+ commandPoolInfo.queueFamilyIndex = fBackendContext->fGraphicsQueueIndex;
+ commandPoolInfo.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ CreateCommandPool(fBackendContext->fDevice, &commandPoolInfo,
+ nullptr, &fCommandPool));
+ }
+
+ // set up the backbuffers
+ VkSemaphoreCreateInfo semaphoreInfo;
+ memset(&semaphoreInfo, 0, sizeof(VkSemaphoreCreateInfo));
+ semaphoreInfo.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+ semaphoreInfo.pNext = nullptr;
+ semaphoreInfo.flags = 0;
+ VkCommandBufferAllocateInfo commandBuffersInfo;
+ memset(&commandBuffersInfo, 0, sizeof(VkCommandBufferAllocateInfo));
+ commandBuffersInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
+ commandBuffersInfo.pNext = nullptr;
+ commandBuffersInfo.commandPool = fCommandPool;
+ commandBuffersInfo.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
+ commandBuffersInfo.commandBufferCount = 2;
+ VkFenceCreateInfo fenceInfo;
+ memset(&fenceInfo, 0, sizeof(VkFenceCreateInfo));
+ fenceInfo.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
+ fenceInfo.pNext = nullptr;
+ fenceInfo.flags = VK_FENCE_CREATE_SIGNALED_BIT;
+
+ // we create one additional backbuffer structure here, because we want to
+ // give the command buffers they contain a chance to finish before we cycle back
+ fBackbuffers = new BackbufferInfo[fImageCount + 1];
+ for (uint32_t i = 0; i < fImageCount + 1; ++i) {
+ fBackbuffers[i].fImageIndex = -1;
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ CreateSemaphore(fBackendContext->fDevice, &semaphoreInfo,
+ nullptr, &fBackbuffers[i].fAcquireSemaphore));
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ CreateSemaphore(fBackendContext->fDevice, &semaphoreInfo,
+ nullptr, &fBackbuffers[i].fRenderSemaphore));
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ AllocateCommandBuffers(fBackendContext->fDevice, &commandBuffersInfo,
+ fBackbuffers[i].fTransitionCmdBuffers));
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ CreateFence(fBackendContext->fDevice, &fenceInfo, nullptr,
+ &fBackbuffers[i].fUsageFences[0]));
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ CreateFence(fBackendContext->fDevice, &fenceInfo, nullptr,
+ &fBackbuffers[i].fUsageFences[1]));
+ }
+ fCurrentBackbufferIndex = fImageCount;
+}
+
+void VulkanWindowContext::destroyBuffers() {
+
+ if (fBackbuffers) {
+ for (uint32_t i = 0; i < fImageCount + 1; ++i) {
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ WaitForFences(fBackendContext->fDevice, 2,
+ fBackbuffers[i].fUsageFences,
+ true, UINT64_MAX));
+ fBackbuffers[i].fImageIndex = -1;
+ GR_VK_CALL(fBackendContext->fInterface,
+ DestroySemaphore(fBackendContext->fDevice,
+ fBackbuffers[i].fAcquireSemaphore,
+ nullptr));
+ GR_VK_CALL(fBackendContext->fInterface,
+ DestroySemaphore(fBackendContext->fDevice,
+ fBackbuffers[i].fRenderSemaphore,
+ nullptr));
+ GR_VK_CALL(fBackendContext->fInterface,
+ FreeCommandBuffers(fBackendContext->fDevice, fCommandPool, 2,
+ fBackbuffers[i].fTransitionCmdBuffers));
+ GR_VK_CALL(fBackendContext->fInterface,
+ DestroyFence(fBackendContext->fDevice, fBackbuffers[i].fUsageFences[0], 0));
+ GR_VK_CALL(fBackendContext->fInterface,
+ DestroyFence(fBackendContext->fDevice, fBackbuffers[i].fUsageFences[1], 0));
+ }
+ }
+
+ delete[] fBackbuffers;
+ fBackbuffers = nullptr;
+
+ delete[] fSurfaces;
+ fSurfaces = nullptr;
+ delete[] fImageLayouts;
+ fImageLayouts = nullptr;
+ delete[] fImages;
+ fImages = nullptr;
+}
+
+VulkanWindowContext::~VulkanWindowContext() {
+ this->destroyContext();
+}
+
+void VulkanWindowContext::destroyContext() {
+ if (!fBackendContext.get()) {
+ return;
+ }
+
+ GR_VK_CALL(fBackendContext->fInterface, DeviceWaitIdle(fBackendContext->fDevice));
+
+ this->destroyBuffers();
+
+ if (VK_NULL_HANDLE != fCommandPool) {
+ GR_VK_CALL(fBackendContext->fInterface, DestroyCommandPool(fBackendContext->fDevice,
+ fCommandPool, nullptr));
+ fCommandPool = VK_NULL_HANDLE;
+ }
+
+ if (VK_NULL_HANDLE != fSwapchain) {
+ fDestroySwapchainKHR(fBackendContext->fDevice, fSwapchain, nullptr);
+ fSwapchain = VK_NULL_HANDLE;
+ }
+
+ if (VK_NULL_HANDLE != fSurface) {
+ fDestroySurfaceKHR(fBackendContext->fInstance, fSurface, nullptr);
+ fSurface = VK_NULL_HANDLE;
+ }
+
+ delete fContext;
+
+ fBackendContext.reset(nullptr);
+}
+
+VulkanWindowContext::BackbufferInfo* VulkanWindowContext::getAvailableBackbuffer() {
+ SkASSERT(fBackbuffers);
+
+ ++fCurrentBackbufferIndex;
+ if (fCurrentBackbufferIndex > fImageCount) {
+ fCurrentBackbufferIndex = 0;
+ }
+
+ BackbufferInfo* backbuffer = fBackbuffers + fCurrentBackbufferIndex;
+
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ WaitForFences(fBackendContext->fDevice, 2, backbuffer->fUsageFences,
+ true, UINT64_MAX));
+ return backbuffer;
+}
+
+SkSurface* VulkanWindowContext::getBackbufferSurface() {
+ BackbufferInfo* backbuffer = this->getAvailableBackbuffer();
+ SkASSERT(backbuffer);
+
+ // reset the fence
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ ResetFences(fBackendContext->fDevice, 2, backbuffer->fUsageFences));
+ // semaphores should be in unsignaled state
+
+ // acquire the image
+ VkResult res = fAcquireNextImageKHR(fBackendContext->fDevice, fSwapchain, UINT64_MAX,
+ backbuffer->fAcquireSemaphore, VK_NULL_HANDLE,
+ &backbuffer->fImageIndex);
+ if (VK_ERROR_SURFACE_LOST_KHR == res) {
+ // need to figure out how to create a new vkSurface without the platformData*
+ // maybe use attach somehow? but need a Window
+ return nullptr;
+ }
+ if (VK_ERROR_OUT_OF_DATE_KHR == res) {
+ // tear swapchain down and try again
+ if (!this->createSwapchain(0, 0)) {
+ return nullptr;
+ }
+
+ // acquire the image
+ res = fAcquireNextImageKHR(fBackendContext->fDevice, fSwapchain, UINT64_MAX,
+ backbuffer->fAcquireSemaphore, VK_NULL_HANDLE,
+ &backbuffer->fImageIndex);
+
+ if (VK_SUCCESS != res) {
+ return nullptr;
+ }
+ }
+
+ // set up layout transfer from initial to color attachment
+ VkImageLayout layout = fImageLayouts[backbuffer->fImageIndex];
+ VkPipelineStageFlags srcStageMask = (VK_IMAGE_LAYOUT_UNDEFINED == layout) ?
+ VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT :
+ VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+ VkPipelineStageFlags dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+ VkAccessFlags srcAccessMask = (VK_IMAGE_LAYOUT_UNDEFINED == layout) ?
+ 0 : VK_ACCESS_MEMORY_READ_BIT;
+ VkAccessFlags dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
+
+ VkImageMemoryBarrier imageMemoryBarrier = {
+ VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER, // sType
+ NULL, // pNext
+ srcAccessMask, // outputMask
+ dstAccessMask, // inputMask
+ layout, // oldLayout
+ VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL, // newLayout
+ fPresentQueueIndex, // srcQueueFamilyIndex
+ fBackendContext->fGraphicsQueueIndex, // dstQueueFamilyIndex
+ fImages[backbuffer->fImageIndex], // image
+ { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 } // subresourceRange
+ };
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ ResetCommandBuffer(backbuffer->fTransitionCmdBuffers[0], 0));
+ VkCommandBufferBeginInfo info;
+ memset(&info, 0, sizeof(VkCommandBufferBeginInfo));
+ info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+ info.flags = 0;
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ BeginCommandBuffer(backbuffer->fTransitionCmdBuffers[0], &info));
+
+ GR_VK_CALL(fBackendContext->fInterface,
+ CmdPipelineBarrier(backbuffer->fTransitionCmdBuffers[0],
+ srcStageMask, dstStageMask, 0,
+ 0, nullptr,
+ 0, nullptr,
+ 1, &imageMemoryBarrier));
+
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ EndCommandBuffer(backbuffer->fTransitionCmdBuffers[0]));
+
+ VkPipelineStageFlags waitDstStageFlags = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+ // insert the layout transfer into the queue and wait on the acquire
+ VkSubmitInfo submitInfo;
+ memset(&submitInfo, 0, sizeof(VkSubmitInfo));
+ submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+ submitInfo.waitSemaphoreCount = 1;
+ submitInfo.pWaitSemaphores = &backbuffer->fAcquireSemaphore;
+ submitInfo.pWaitDstStageMask = &waitDstStageFlags;
+ submitInfo.commandBufferCount = 1;
+ submitInfo.pCommandBuffers = &backbuffer->fTransitionCmdBuffers[0];
+ submitInfo.signalSemaphoreCount = 0;
+
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ QueueSubmit(fBackendContext->fQueue, 1, &submitInfo,
+ backbuffer->fUsageFences[0]));
+
+ return fSurfaces[backbuffer->fImageIndex].get();
+}
+
+
+void VulkanWindowContext::swapBuffers() {
+
+ BackbufferInfo* backbuffer = fBackbuffers + fCurrentBackbufferIndex;
+
+ VkImageLayout layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+ VkPipelineStageFlags srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+ VkPipelineStageFlags dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
+ VkAccessFlags srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
+ VkAccessFlags dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
+
+ VkImageMemoryBarrier imageMemoryBarrier = {
+ VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER, // sType
+ NULL, // pNext
+ srcAccessMask, // outputMask
+ dstAccessMask, // inputMask
+ layout, // oldLayout
+ VK_IMAGE_LAYOUT_PRESENT_SRC_KHR, // newLayout
+ fBackendContext->fGraphicsQueueIndex, // srcQueueFamilyIndex
+ fPresentQueueIndex, // dstQueueFamilyIndex
+ fImages[backbuffer->fImageIndex], // image
+ { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 } // subresourceRange
+ };
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ ResetCommandBuffer(backbuffer->fTransitionCmdBuffers[1], 0));
+ VkCommandBufferBeginInfo info;
+ memset(&info, 0, sizeof(VkCommandBufferBeginInfo));
+ info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+ info.flags = 0;
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ BeginCommandBuffer(backbuffer->fTransitionCmdBuffers[1], &info));
+ GR_VK_CALL(fBackendContext->fInterface,
+ CmdPipelineBarrier(backbuffer->fTransitionCmdBuffers[1],
+ srcStageMask, dstStageMask, 0,
+ 0, nullptr,
+ 0, nullptr,
+ 1, &imageMemoryBarrier));
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ EndCommandBuffer(backbuffer->fTransitionCmdBuffers[1]));
+
+ fImageLayouts[backbuffer->fImageIndex] = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+
+ // insert the layout transfer into the queue and wait on the acquire
+ VkSubmitInfo submitInfo;
+ memset(&submitInfo, 0, sizeof(VkSubmitInfo));
+ submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+ submitInfo.waitSemaphoreCount = 0;
+ submitInfo.pWaitDstStageMask = 0;
+ submitInfo.commandBufferCount = 1;
+ submitInfo.pCommandBuffers = &backbuffer->fTransitionCmdBuffers[1];
+ submitInfo.signalSemaphoreCount = 1;
+ submitInfo.pSignalSemaphores = &backbuffer->fRenderSemaphore;
+
+ GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+ QueueSubmit(fBackendContext->fQueue, 1, &submitInfo,
+ backbuffer->fUsageFences[1]));
+
+ // Submit present operation to present queue
+ const VkPresentInfoKHR presentInfo =
+ {
+ VK_STRUCTURE_TYPE_PRESENT_INFO_KHR, // sType
+ NULL, // pNext
+ 1, // waitSemaphoreCount
+ &backbuffer->fRenderSemaphore, // pWaitSemaphores
+ 1, // swapchainCount
+ &fSwapchain, // pSwapchains
+ &backbuffer->fImageIndex, // pImageIndices
+ NULL // pResults
+ };
+
+ fQueuePresentKHR(fPresentQueue, &presentInfo);
+
+}
+
+} //namespace sk_app