launch_gpu_defaults.h

#pragma once
 
#include "pixelbullet/application/specification.h"
 
#include <cstdint>
#include <filesystem>
#include <optional>
#include <string>
 
namespace pixelbullet
{
struct SavedGpuLaunchDefault
{
    std::optional<uint32_t> gpu_index;
    std::optional<GraphicsDevicePreference> gpu_preference;
};
 
enum class LaunchGpuSelectorSource : uint8_t
{
    ImplicitAuto,
    ExplicitGpuPreference,
    ExplicitGpuIndex,
    SavedGpuPreference,
    SavedGpuIndex,
};
 
struct LaunchGpuDefaultsLoadResult
{
    std::filesystem::path path;
    std::optional<SavedGpuLaunchDefault> saved_default;
    std::string warning_message;
};
 
struct ResolvedLaunchGpuDefaults
{
    ApplicationBootstrap effective_bootstrap;
    std::filesystem::path path;
    std::optional<SavedGpuLaunchDefault> saved_default;
    LaunchGpuSelectorSource selector_source = LaunchGpuSelectorSource::ImplicitAuto;
    bool applied_saved_default = false;
    std::string warning_message;
};
 
[[nodiscard]] std::filesystem::path GetDefaultLaunchGpuDefaultsPath(const std::filesystem::path& binary_path);
[[nodiscard]] LaunchGpuDefaultsLoadResult LoadLaunchGpuDefaults(const std::filesystem::path& path);
[[nodiscard]] bool SaveLaunchGpuDefault(const std::filesystem::path& path, const SavedGpuLaunchDefault& saved_default,
                                        std::string* error_message);
[[nodiscard]] bool ClearLaunchGpuDefault(const std::filesystem::path& path, std::string* error_message);
[[nodiscard]] std::string DescribeSavedGpuLaunchDefault(const SavedGpuLaunchDefault& saved_default);
[[nodiscard]] std::string DescribeResolvedGpuSelector(const ResolvedLaunchGpuDefaults& resolved_defaults);
} // namespace pixelbullet