3 files changed, 305 insertions, 1 deletions

diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 14b76680f..44c761d3e 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -128,7 +128,9 @@ if (ENABLE_VULKAN)
         renderer_vulkan/vk_scheduler.cpp
         renderer_vulkan/vk_scheduler.h
         renderer_vulkan/vk_stream_buffer.cpp
-        renderer_vulkan/vk_stream_buffer.h)
+        renderer_vulkan/vk_stream_buffer.h
+        renderer_vulkan/vk_swapchain.cpp
+        renderer_vulkan/vk_swapchain.h)
 
     target_include_directories(video_core PRIVATE ../../externals/Vulkan-Headers/include)
     target_compile_definitions(video_core PRIVATE HAS_VULKAN)
diff --git a/src/video_core/renderer_vulkan/vk_swapchain.cpp b/src/video_core/renderer_vulkan/vk_swapchain.cpp
new file mode 100644
index 000000000..08279e562
--- /dev/null
+++ b/src/video_core/renderer_vulkan/vk_swapchain.cpp
@@ -0,0 +1,210 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <array>
+#include <limits>
+#include <vector>
+
+#include "common/assert.h"
+#include "common/logging/log.h"
+#include "core/core.h"
+#include "core/frontend/framebuffer_layout.h"
+#include "video_core/renderer_vulkan/declarations.h"
+#include "video_core/renderer_vulkan/vk_device.h"
+#include "video_core/renderer_vulkan/vk_resource_manager.h"
+#include "video_core/renderer_vulkan/vk_swapchain.h"
+
+namespace Vulkan {
+
+namespace {
+vk::SurfaceFormatKHR ChooseSwapSurfaceFormat(const std::vector<vk::SurfaceFormatKHR>& formats) {
+    if (formats.size() == 1 && formats[0].format == vk::Format::eUndefined) {
+        return {vk::Format::eB8G8R8A8Unorm, vk::ColorSpaceKHR::eSrgbNonlinear};
+    }
+    const auto& found = std::find_if(formats.begin(), formats.end(), [](const auto& format) {
+        return format.format == vk::Format::eB8G8R8A8Unorm &&
+               format.colorSpace == vk::ColorSpaceKHR::eSrgbNonlinear;
+    });
+    return found != formats.end() ? *found : formats[0];
+}
+
+vk::PresentModeKHR ChooseSwapPresentMode(const std::vector<vk::PresentModeKHR>& modes) {
+    // Mailbox doesn't lock the application like fifo (vsync), prefer it
+    const auto& found = std::find_if(modes.begin(), modes.end(), [](const auto& mode) {
+        return mode == vk::PresentModeKHR::eMailbox;
+    });
+    return found != modes.end() ? *found : vk::PresentModeKHR::eFifo;
+}
+
+vk::Extent2D ChooseSwapExtent(const vk::SurfaceCapabilitiesKHR& capabilities, u32 width,
+                              u32 height) {
+    constexpr auto undefined_size{std::numeric_limits<u32>::max()};
+    if (capabilities.currentExtent.width != undefined_size) {
+        return capabilities.currentExtent;
+    }
+    vk::Extent2D extent = {width, height};
+    extent.width = std::max(capabilities.minImageExtent.width,
+                            std::min(capabilities.maxImageExtent.width, extent.width));
+    extent.height = std::max(capabilities.minImageExtent.height,
+                             std::min(capabilities.maxImageExtent.height, extent.height));
+    return extent;
+}
+} // namespace
+
+VKSwapchain::VKSwapchain(vk::SurfaceKHR surface, const VKDevice& device)
+    : surface{surface}, device{device} {}
+
+VKSwapchain::~VKSwapchain() = default;
+
+void VKSwapchain::Create(u32 width, u32 height) {
+    const auto dev = device.GetLogical();
+    const auto& dld = device.GetDispatchLoader();
+    const auto physical_device = device.GetPhysical();
+
+    const vk::SurfaceCapabilitiesKHR capabilities{
+        physical_device.getSurfaceCapabilitiesKHR(surface, dld)};
+    if (capabilities.maxImageExtent.width == 0 || capabilities.maxImageExtent.height == 0) {
+        return;
+    }
+
+    dev.waitIdle(dld);
+    Destroy();
+
+    CreateSwapchain(capabilities, width, height);
+    CreateSemaphores();
+    CreateImageViews();
+
+    fences.resize(image_count, nullptr);
+}
+
+void VKSwapchain::AcquireNextImage() {
+    const auto dev{device.GetLogical()};
+    const auto& dld{device.GetDispatchLoader()};
+    dev.acquireNextImageKHR(*swapchain, std::numeric_limits<u64>::max(),
+                            *present_semaphores[frame_index], {}, &image_index, dld);
+
+    if (auto& fence = fences[image_index]; fence) {
+        fence->Wait();
+        fence->Release();
+        fence = nullptr;
+    }
+}
+
+bool VKSwapchain::Present(vk::Semaphore render_semaphore, VKFence& fence) {
+    const vk::Semaphore present_semaphore{*present_semaphores[frame_index]};
+    const std::array<vk::Semaphore, 2> semaphores{present_semaphore, render_semaphore};
+    const u32 wait_semaphore_count{render_semaphore ? 2U : 1U};
+    const auto& dld{device.GetDispatchLoader()};
+    const auto present_queue{device.GetPresentQueue()};
+    bool recreated = false;
+
+    const vk::PresentInfoKHR present_info(wait_semaphore_count, semaphores.data(), 1,
+                                          &swapchain.get(), &image_index, {});
+    switch (const auto result = present_queue.presentKHR(&present_info, dld); result) {
+    case vk::Result::eSuccess:
+        break;
+    case vk::Result::eErrorOutOfDateKHR:
+        if (current_width > 0 && current_height > 0) {
+            Create(current_width, current_height);
+            recreated = true;
+        }
+        break;
+    default:
+        LOG_CRITICAL(Render_Vulkan, "Vulkan failed to present swapchain due to {}!",
+                     vk::to_string(result));
+        UNREACHABLE();
+    }
+
+    ASSERT(fences[image_index] == nullptr);
+    fences[image_index] = &fence;
+    frame_index = (frame_index + 1) % image_count;
+    return recreated;
+}
+
+bool VKSwapchain::HasFramebufferChanged(const Layout::FramebufferLayout& framebuffer) const {
+    // TODO(Rodrigo): Handle framebuffer pixel format changes
+    return framebuffer.width != current_width || framebuffer.height != current_height;
+}
+
+void VKSwapchain::CreateSwapchain(const vk::SurfaceCapabilitiesKHR& capabilities, u32 width,
+                                  u32 height) {
+    const auto dev{device.GetLogical()};
+    const auto& dld{device.GetDispatchLoader()};
+    const auto physical_device{device.GetPhysical()};
+
+    const std::vector<vk::SurfaceFormatKHR> formats{
+        physical_device.getSurfaceFormatsKHR(surface, dld)};
+
+    const std::vector<vk::PresentModeKHR> present_modes{
+        physical_device.getSurfacePresentModesKHR(surface, dld)};
+
+    const vk::SurfaceFormatKHR surface_format{ChooseSwapSurfaceFormat(formats)};
+    const vk::PresentModeKHR present_mode{ChooseSwapPresentMode(present_modes)};
+    extent = ChooseSwapExtent(capabilities, width, height);
+
+    current_width = extent.width;
+    current_height = extent.height;
+
+    u32 requested_image_count{capabilities.minImageCount + 1};
+    if (capabilities.maxImageCount > 0 && requested_image_count > capabilities.maxImageCount) {
+        requested_image_count = capabilities.maxImageCount;
+    }
+
+    vk::SwapchainCreateInfoKHR swapchain_ci(
+        {}, surface, requested_image_count, surface_format.format, surface_format.colorSpace,
+        extent, 1, vk::ImageUsageFlagBits::eColorAttachment, {}, {}, {},
+        capabilities.currentTransform, vk::CompositeAlphaFlagBitsKHR::eOpaque, present_mode, false,
+        {});
+
+    const u32 graphics_family{device.GetGraphicsFamily()};
+    const u32 present_family{device.GetPresentFamily()};
+    const std::array<u32, 2> queue_indices{graphics_family, present_family};
+    if (graphics_family != present_family) {
+        swapchain_ci.imageSharingMode = vk::SharingMode::eConcurrent;
+        swapchain_ci.queueFamilyIndexCount = static_cast<u32>(queue_indices.size());
+        swapchain_ci.pQueueFamilyIndices = queue_indices.data();
+    } else {
+        swapchain_ci.imageSharingMode = vk::SharingMode::eExclusive;
+    }
+
+    swapchain = dev.createSwapchainKHRUnique(swapchain_ci, nullptr, dld);
+
+    images = dev.getSwapchainImagesKHR(*swapchain, dld);
+    image_count = static_cast<u32>(images.size());
+    image_format = surface_format.format;
+}
+
+void VKSwapchain::CreateSemaphores() {
+    const auto dev{device.GetLogical()};
+    const auto& dld{device.GetDispatchLoader()};
+
+    present_semaphores.resize(image_count);
+    for (std::size_t i = 0; i < image_count; i++) {
+        present_semaphores[i] = dev.createSemaphoreUnique({}, nullptr, dld);
+    }
+}
+
+void VKSwapchain::CreateImageViews() {
+    const auto dev{device.GetLogical()};
+    const auto& dld{device.GetDispatchLoader()};
+
+    image_views.resize(image_count);
+    for (std::size_t i = 0; i < image_count; i++) {
+        const vk::ImageViewCreateInfo image_view_ci({}, images[i], vk::ImageViewType::e2D,
+                                                    image_format, {},
+                                                    {vk::ImageAspectFlagBits::eColor, 0, 1, 0, 1});
+        image_views[i] = dev.createImageViewUnique(image_view_ci, nullptr, dld);
+    }
+}
+
+void VKSwapchain::Destroy() {
+    frame_index = 0;
+    present_semaphores.clear();
+    framebuffers.clear();
+    image_views.clear();
+    swapchain.reset();
+}
+
+} // namespace Vulkan
diff --git a/src/video_core/renderer_vulkan/vk_swapchain.h b/src/video_core/renderer_vulkan/vk_swapchain.h
new file mode 100644
index 000000000..2ad84f185
--- /dev/null
+++ b/src/video_core/renderer_vulkan/vk_swapchain.h
@@ -0,0 +1,92 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+
+#include "common/common_types.h"
+#include "video_core/renderer_vulkan/declarations.h"
+
+namespace Layout {
+struct FramebufferLayout;
+}
+
+namespace Vulkan {
+
+class VKDevice;
+class VKFence;
+
+class VKSwapchain {
+public:
+    explicit VKSwapchain(vk::SurfaceKHR surface, const VKDevice& device);
+    ~VKSwapchain();
+
+    /// Creates (or recreates) the swapchain with a given size.
+    void Create(u32 width, u32 height);
+
+    /// Acquires the next image in the swapchain, waits as needed.
+    void AcquireNextImage();
+
+    /// Presents the rendered image to the swapchain. Returns true when the swapchains had to be
+    /// recreated. Takes responsability for the ownership of fence.
+    bool Present(vk::Semaphore render_semaphore, VKFence& fence);
+
+    /// Returns true when the framebuffer layout has changed.
+    bool HasFramebufferChanged(const Layout::FramebufferLayout& framebuffer) const;
+
+    const vk::Extent2D& GetSize() const {
+        return extent;
+    }
+
+    u32 GetImageCount() const {
+        return image_count;
+    }
+
+    u32 GetImageIndex() const {
+        return image_index;
+    }
+
+    vk::Image GetImageIndex(u32 index) const {
+        return images[index];
+    }
+
+    vk::ImageView GetImageViewIndex(u32 index) const {
+        return *image_views[index];
+    }
+
+    vk::Format GetImageFormat() const {
+        return image_format;
+    }
+
+private:
+    void CreateSwapchain(const vk::SurfaceCapabilitiesKHR& capabilities, u32 width, u32 height);
+    void CreateSemaphores();
+    void CreateImageViews();
+
+    void Destroy();
+
+    const vk::SurfaceKHR surface;
+    const VKDevice& device;
+
+    UniqueSwapchainKHR swapchain;
+
+    u32 image_count{};
+    std::vector<vk::Image> images;
+    std::vector<UniqueImageView> image_views;
+    std::vector<UniqueFramebuffer> framebuffers;
+    std::vector<VKFence*> fences;
+    std::vector<UniqueSemaphore> present_semaphores;
+
+    u32 image_index{};
+    u32 frame_index{};
+
+    vk::Format image_format{};
+    vk::Extent2D extent{};
+
+    u32 current_width{};
+    u32 current_height{};
+};
+
+} // namespace Vulkan