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// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <exception>
#include <iterator>
#include <limits>
#include <memory>
#include <optional>
#include <type_traits>
#include <utility>
#include <vector>
#define VK_NO_PROTOTYPES
#include <vulkan/vulkan.h>
#include "common/common_types.h"
namespace Vulkan::vk {
/**
* Span for Vulkan arrays.
* Based on std::span but optimized for array access instead of iterators.
* Size returns uint32_t instead of size_t to ease interaction with Vulkan functions.
*/
template <typename T>
class Span {
public:
/// Construct an empty span.
constexpr Span() noexcept = default;
/// Construct a span from a single element.
constexpr Span(const T& value) noexcept : ptr{&value}, num{1} {}
/// Construct a span from a range.
template <typename Range>
// requires std::data(const Range&)
// requires std::size(const Range&)
constexpr Span(const Range& range) : ptr{std::data(range)}, num{std::size(range)} {}
/// Construct a span from a pointer and a size.
/// This is inteded for subranges.
constexpr Span(const T* ptr, std::size_t num) noexcept : ptr{ptr}, num{num} {}
/// Returns the data pointer by the span.
constexpr const T* data() const noexcept {
return ptr;
}
/// Returns the number of elements in the span.
constexpr u32 size() const noexcept {
return static_cast<u32>(num);
}
/// Returns true when the span is empty.
constexpr bool empty() const noexcept {
return num == 0;
}
/// Returns a reference to the element in the passed index.
/// @pre: index < size()
constexpr const T& operator[](std::size_t index) const noexcept {
return ptr[index];
}
/// Returns an iterator to the beginning of the span.
constexpr const T* begin() const noexcept {
return ptr;
}
/// Returns an iterator to the end of the span.
constexpr const T* end() const noexcept {
return ptr + num;
}
private:
const T* ptr = nullptr;
std::size_t num = 0;
};
/// Vulkan exception generated from a VkResult.
class Exception final : public std::exception {
public:
/// Construct the exception with a result.
/// @pre result != VK_SUCCESS
explicit Exception(VkResult result_) : result{result_} {}
virtual ~Exception() = default;
const char* what() const noexcept override;
private:
VkResult result;
};
/// Converts a VkResult enum into a rodata string
const char* ToString(VkResult) noexcept;
/// Throws a Vulkan exception if result is not success.
inline void Check(VkResult result) {
if (result != VK_SUCCESS) {
throw Exception(result);
}
}
/// Throws a Vulkan exception if result is an error.
/// @return result
inline VkResult Filter(VkResult result) {
if (result < 0) {
throw Exception(result);
}
return result;
}
} // namespace Vulkan::vk
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