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// Copyright 2021 The SwiftShader Authors. All Rights Reserved.
//
// 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 "Swapchain.hpp"
#include "Window.hpp"
Swapchain::Swapchain(vk::PhysicalDevice physicalDevice, vk::Device device, Window &window)
: device(device)
{
vk::SurfaceKHR surface = window.getSurface();
// Create the swapchain
vk::SurfaceCapabilitiesKHR surfaceCapabilities = physicalDevice.getSurfaceCapabilitiesKHR(surface);
extent = surfaceCapabilities.currentExtent;
vk::SwapchainCreateInfoKHR swapchainCreateInfo;
swapchainCreateInfo.surface = surface;
swapchainCreateInfo.minImageCount = 2; // double-buffered
swapchainCreateInfo.imageFormat = colorFormat;
swapchainCreateInfo.imageColorSpace = vk::ColorSpaceKHR::eSrgbNonlinear;
swapchainCreateInfo.imageExtent = extent;
swapchainCreateInfo.imageUsage = vk::ImageUsageFlagBits::eColorAttachment;
swapchainCreateInfo.preTransform = vk::SurfaceTransformFlagBitsKHR::eIdentity;
swapchainCreateInfo.imageArrayLayers = 1;
swapchainCreateInfo.imageSharingMode = vk::SharingMode::eExclusive;
swapchainCreateInfo.presentMode = vk::PresentModeKHR::eFifo;
swapchainCreateInfo.clipped = VK_TRUE;
swapchainCreateInfo.compositeAlpha = vk::CompositeAlphaFlagBitsKHR::eOpaque;
swapchain = device.createSwapchainKHR(swapchainCreateInfo);
// Obtain the images and create views for them
images = device.getSwapchainImagesKHR(swapchain);
imageViews.resize(images.size());
for(size_t i = 0; i < imageViews.size(); i++)
{
vk::ImageViewCreateInfo colorAttachmentView;
colorAttachmentView.image = images[i];
colorAttachmentView.viewType = vk::ImageViewType::e2D;
colorAttachmentView.format = colorFormat;
colorAttachmentView.subresourceRange.aspectMask = vk::ImageAspectFlagBits::eColor;
colorAttachmentView.subresourceRange.baseMipLevel = 0;
colorAttachmentView.subresourceRange.levelCount = 1;
colorAttachmentView.subresourceRange.baseArrayLayer = 0;
colorAttachmentView.subresourceRange.layerCount = 1;
imageViews[i] = device.createImageView(colorAttachmentView);
}
}
Swapchain::~Swapchain()
{
for(auto &imageView : imageViews)
{
device.destroyImageView(imageView, nullptr);
}
device.destroySwapchainKHR(swapchain, nullptr);
}
void Swapchain::acquireNextImage(VkSemaphore presentCompleteSemaphore, uint32_t &imageIndex)
{
auto result = device.acquireNextImageKHR(swapchain, UINT64_MAX, presentCompleteSemaphore, vk::Fence());
imageIndex = result.value;
}
void Swapchain::queuePresent(vk::Queue queue, uint32_t imageIndex, vk::Semaphore waitSemaphore)
{
vk::PresentInfoKHR presentInfo;
presentInfo.pWaitSemaphores = &waitSemaphore;
presentInfo.waitSemaphoreCount = 1;
presentInfo.swapchainCount = 1;
presentInfo.pSwapchains = &swapchain;
presentInfo.pImageIndices = &imageIndex;
queue.presentKHR(presentInfo);
}