SwapChainSupportDetails.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 "SwapChainSupportDetails.hpp"
 
#include <Kale/Core/Application/Application.hpp>
#include <Kale/Vulkan/Core/Core.hpp>
 
#include <limits>
#include <algorithm>
 
using namespace Kale;
using namespace Kale::Vulkan;
 
SwapChainSupportDetails::SwapChainSupportDetails() {
    // Empty Body
}
 
SwapChainSupportDetails::SwapChainSupportDetails(const vk::PhysicalDevice& physicalDevice) :
    capabilities(physicalDevice.getSurfaceCapabilitiesKHR(Core::surface.get())),
    formats(physicalDevice.getSurfaceFormatsKHR(Core::surface.get())),
    presentModes(physicalDevice.getSurfacePresentModesKHR(Core::surface.get())) {
    
    // Empty Body
}
 
bool SwapChainSupportDetails::deviceIsAdequate() const {
    return !formats.empty() && !presentModes.empty();
}
 
vk::SurfaceFormatKHR SwapChainSupportDetails::chooseFormat() const {
    for (const vk::SurfaceFormatKHR& format : formats)
        if (format.format == vk::Format::eR8G8B8A8Srgb && format.colorSpace == vk::ColorSpaceKHR::eSrgbNonlinear)
            return format;
    
    return formats[0];
}
 
vk::PresentModeKHR SwapChainSupportDetails::choosePresentMode() const {
    // TODO - Add configuration settings for high/medium/low graphics
    if (std::find(presentModes.begin(), presentModes.end(), vk::PresentModeKHR::eMailbox) != presentModes.end())
        return vk::PresentModeKHR::eMailbox;
    else
        return vk::PresentModeKHR::eFifo;
}
 
vk::Extent2D SwapChainSupportDetails::chooseSwapExtent() const {
    if (capabilities.currentExtent.width != std::numeric_limits<uint32_t>::max()) {
        // We're required to use the vulkan/window current extent
        return capabilities.currentExtent;
    }
    else {
        // Get the window size and clamp it then return
        Vector2ui32 winSize = mainApp->getWindow().getSize().cast<uint32_t>();
        winSize.clampTo(capabilities.minImageExtent.width, capabilities.maxImageExtent.width,
            capabilities.minImageExtent.height, capabilities.maxImageExtent.height);
        return vk::Extent2D{winSize.x, winSize.y};
    }
}
 
#endif