SwapChain.cpp

Go to the documentation of this file.

/*
   Copyright 2022 Rishi Challa
 
   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.
*/
 
#ifdef KALE_VULKAN
 
#include "SwapChain.hpp"
 
#include <Kale/Vulkan/Core/Core.hpp>
#include <Kale/Vulkan/Device/Device.hpp>
#include <Kale/Vulkan/FrameBuffer/FrameBuffer.hpp>
#include <Kale/Vulkan/Renderer/Renderer.hpp>
 
using namespace Kale;
using namespace Kale::Vulkan;
 
SwapChain::SwapChain(Device& device) : ChildResource(device), support(device.physicalDevice) {
    createSwapChain();
}
 
void SwapChain::init(Device& device) {
    ChildResource::init(device);
    support = SwapChainSupportDetails(device.physicalDevice);
    createSwapChain();
}
 
void SwapChain::createSwapChain() {
    vk::SurfaceFormatKHR swapformat = support.chooseFormat();
    vk::PresentModeKHR presentMode = support.choosePresentMode();
    vk::Extent2D swapextent = support.chooseSwapExtent();
 
    uint32_t imageCount = support.capabilities.minImageCount + 1;
    if (support.capabilities.maxImageCount != 0 && imageCount > support.capabilities.maxImageCount)
        imageCount = support.capabilities.maxImageCount;
    
    vk::SwapchainCreateInfoKHR createInfo;
    createInfo.surface = Core::surface.get();
    createInfo.minImageCount = imageCount;
    createInfo.imageFormat = swapformat.format;
    createInfo.imageColorSpace = swapformat.colorSpace;
    createInfo.imageExtent = swapextent;
    createInfo.imageArrayLayers = 1;
    createInfo.imageUsage = vk::ImageUsageFlagBits::eColorAttachment;
 
    uint32_t queueFamilyIndices[] = {
        parentPtr->queueIndices.graphicsFamilyIndex.value(),
        parentPtr->queueIndices.presentFamilyIndex.value()
    };
 
    if (parentPtr->queueIndices.graphicsFamilyIndex == parentPtr->queueIndices.presentFamilyIndex) {
        createInfo.imageSharingMode = vk::SharingMode::eExclusive;
    }
    else {
        createInfo.imageSharingMode = vk::SharingMode::eConcurrent;
        createInfo.queueFamilyIndexCount = 2;
        createInfo.pQueueFamilyIndices = queueFamilyIndices;
    }
 
    createInfo.preTransform = support.capabilities.currentTransform;
    createInfo.compositeAlpha = vk::CompositeAlphaFlagBitsKHR::eOpaque;
    createInfo.presentMode = presentMode;
    createInfo.clipped = VK_TRUE;
    createInfo.oldSwapchain = nullptr;
    
    swapchain = parentPtr->logicalDevice->createSwapchainKHRUnique(createInfo);
 
    // Get swapchain images
    images = parentPtr->logicalDevice->getSwapchainImagesKHR(swapchain.get());
    extent = swapextent;
    format = swapformat.format;
 
    createImageViews();
}
 
void SwapChain::createImageViews() {
    imageViews.reserve(images.size());
    for (const vk::Image& image : images) {
        vk::ImageSubresourceRange range(vk::ImageAspectFlagBits::eColor, 0, 1, 0, 1);
        vk::ImageViewCreateInfo createInfo(vk::ImageViewCreateFlags(), image, vk::ImageViewType::e2D, format,
            vk::ComponentMapping(), range);
        imageViews.push_back(parentPtr->logicalDevice->createImageViewUnique(createInfo));
    }
}
 
void SwapChain::createFrameBuffers(Renderer& renderer) {
    // Clear the current frame buffers
    frameBuffers.clear();
 
    // Reserve memory for the frame buffers
    frameBuffers.reserve(imageViews.size());
 
    // Create the frame buffers from the iamge views
    for (const vk::UniqueImageView& imageView : imageViews) {
        vk::FramebufferCreateInfo createInfo(vk::FramebufferCreateFlags(), renderer.renderPass.get(), 1, &imageView.get(),
            extent.width, extent.height, 1);
        frameBuffers.push_back(Core::device.logicalDevice->createFramebufferUnique(createInfo));
    }
}
 
SwapChain::SwapChain() {
    // Empty Body
}
 
void SwapChain::freeResources(bool remove) {
    ChildResource::freeResources(remove);
    ParentResource::freeChildren();
    frameBuffers.clear();
    imageViews.clear();
    swapchain.reset();
}
 
#endif