DeviceSelection.h

Go to the documentation of this file.

/* Copyright (C) 2023 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef INCLUDED_RENDERER_BACKEND_VULKAN_DEVICESELECTION
#define INCLUDED_RENDERER_BACKEND_VULKAN_DEVICESELECTION
 
#include "scriptinterface/ScriptForward.h"
 
#include <glad/vulkan.h>
#include <limits>
#include <vector>
 
namespace Renderer
{
 
namespace Backend
{
 
namespace Vulkan
{
 
/**
 * Structure to store all information that might be useful on device selection.
 */
struct SAvailablePhysicalDevice
{
    uint32_t index = std::numeric_limits<uint32_t>::max();
    VkPhysicalDevice device = VK_NULL_HANDLE;
    VkPhysicalDeviceProperties properties{};
    VkPhysicalDeviceDescriptorIndexingPropertiesEXT descriptorIndexingProperties{};
    VkPhysicalDeviceMemoryProperties memoryProperties{};
    VkPhysicalDeviceFeatures features{};
    VkPhysicalDeviceDescriptorIndexingFeaturesEXT descriptorIndexingFeatures{};
    std::vector<VkQueueFamilyProperties> queueFamilies;
    bool hasRequiredExtensions = false;
    bool hasOutputToSurfaceSupport = false;
    size_t graphicsQueueFamilyIndex = 0;
    size_t presentQueueFamilyIndex = 0;
    VkDeviceSize deviceTotalMemory = 0;
    VkDeviceSize hostTotalMemory = 0;
    std::vector<std::string> extensions;
    VkSurfaceCapabilitiesKHR surfaceCapabilities;
    std::vector<VkSurfaceFormatKHR> surfaceFormats;
    std::vector<VkPresentModeKHR> presentModes;
};
 
/**
 * @return all available physical devices for the Vulkan instance with
 * additional flags of surface and required extensions support.
 * We could have a single function that returns a selected device. But we use
 * multiple functions to be able to save some information about available
 * devices before filtering and give a choice to a user.
 */
std::vector<SAvailablePhysicalDevice> GetAvailablePhysicalDevices(
    VkInstance instance, VkSurfaceKHR surface,
    const std::vector<const char*>& requiredDeviceExtensions);
 
/**
 * @return true if we can't use the device for our needs. For example, it
 * doesn't graphics or present queues. Because we can't render the game without
 * them.
 */
bool IsPhysicalDeviceUnsupported(const SAvailablePhysicalDevice& device);
 
/**
 * @return true if the first device is better for our needs than the second
 * one. Useful in functions like std::sort. The first and the second devices
 * should be supported (in other words IsPhysicalDeviceSupported should
 * return true for both of them).
 */
bool ComparePhysicalDevices(
    const SAvailablePhysicalDevice& device1,
    const SAvailablePhysicalDevice& device2);
 
bool IsSurfaceFormatSupported(
    const VkSurfaceFormatKHR& surfaceFormat);
 
/**
 * Report all desired information about the available physical device.
 */
void ReportAvailablePhysicalDevice(const SAvailablePhysicalDevice& device,
    const ScriptRequest& rq, JS::HandleValue settings);
 
} // namespace Vulkan
 
} // namespace Backend
 
} // namespace Renderer
 
#endif // INCLUDED_RENDERER_BACKEND_VULKAN_DEVICESELECTION