FrameBuffer.cpp

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/*
   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 "FrameBuffer.hpp"
 
#include <Kale/Vulkan/Renderer/Renderer.hpp>
#include <Kale/Vulkan/Core/Core.hpp>
 
#ifdef KALE_DEBUG
 
#include <cassert>
 
#endif
 
using namespace Kale;
using namespace Kale::Vulkan;
 
FrameBuffer::FrameBuffer() {
    // Empty Body
}
 
FrameBuffer::FrameBuffer(Renderer& renderer, const Vector2ui32& size) : ChildResource(renderer) {
 
    // Create the image
    const vk::ImageCreateInfo imageCreateInfo(vk::ImageCreateFlags(), vk::ImageType::e2D, Core::swapchain.format,
        {size.x, size.y, 1}, 1, 1, vk::SampleCountFlagBits::e1, vk::ImageTiling::eOptimal,
        vk::ImageUsageFlagBits::eColorAttachment | vk::ImageUsageFlagBits::eSampled);
    image = Core::device.logicalDevice.get().createImageUnique(imageCreateInfo);
 
    // Allocate memory for the image and bind it
    imageMemory.init(Core::device, Core::device.logicalDevice.get().getImageMemoryRequirements(image.get()),
        vk::MemoryPropertyFlagBits::eDeviceLocal);
    Core::device.logicalDevice.get().bindImageMemory(image.get(), imageMemory.deviceMemory.get(), imageMemory.memoryInfo.alignment);
    
    // Create the image view
    const vk::ImageSubresourceRange range(vk::ImageAspectFlagBits::eColor, 0, 1, 0, 1);
    const vk::ImageViewCreateInfo imageViewCreateInfo(vk::ImageViewCreateFlags(), image.get(), vk::ImageViewType::e2D,
        Core::swapchain.format, vk::ComponentMapping(), range);
    imageView = Core::device.logicalDevice.get().createImageViewUnique(imageViewCreateInfo);
 
    // Sets up the frame buffer
    createFrameBuffer(imageView, {size.x, size.y}, renderer.renderPass);
}
 
void FrameBuffer::init(Renderer& renderer, const Vector2ui32& size) {
 
    ChildResource::init(renderer);
 
    // Create the image
    const vk::Extent3D extent(size.x, size.y, 1);
    const vk::ImageCreateInfo imageCreateInfo(vk::ImageCreateFlags(), vk::ImageType::e2D, Core::swapchain.format, extent);
    image = Core::device.logicalDevice.get().createImageUnique(imageCreateInfo);
    
    // Create the image view
    const vk::ImageSubresourceRange range(vk::ImageAspectFlagBits::eColor, 0, 1, 0, 1);
    const vk::ImageViewCreateInfo imageViewCreateInfo(vk::ImageViewCreateFlags(), image.get(), vk::ImageViewType::e2D,
        Core::swapchain.format, vk::ComponentMapping(), range);
    imageView = Core::device.logicalDevice.get().createImageViewUnique(imageViewCreateInfo);
 
    // Sets up the frame buffer
    createFrameBuffer(imageView, {size.x, size.y}, renderer.renderPass);
}
 
void FrameBuffer::createFrameBuffer(const vk::UniqueImageView& imageView, const vk::Extent2D& extent,
    const vk::UniqueRenderPass& renderPass) {
    
    vk::FramebufferCreateInfo createInfo(vk::FramebufferCreateFlags(), renderPass.get(), 1, &imageView.get(),
        extent.width, extent.height, 1);
    framebuffer = Core::device.logicalDevice->createFramebufferUnique(createInfo);
}
 
void FrameBuffer::freeResources(bool remove) {
    ChildResource::freeResources(remove);
    ParentResource::freeChildren();
    framebuffer.reset();
}
 
void FrameBuffer::freeResources() {
    ChildResource::freeResources();
    ParentResource::freeChildren();
    framebuffer.reset();
    imageView.reset();
    image.reset();
    imageMemory.freeResources();
}
 
#endif