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/* Copyright (c) 2015-2016, Stanislaw Halik <sthalik@misaki.pl>
* Permission to use, copy, modify, and/or distribute this
* software for any purpose with or without fee is hereby granted,
* provided that the above copyright notice and this permission
* notice appear in all copies.
*/
#pragma once
#include "dinput.hpp"
#include "compat/timer.hpp"
#include "compat/qhash.hpp"
#include "export.hpp"
#include <memory>
#include <vector>
#include <functional>
#include <unordered_map>
#include <iterator>
#include <QString>
#include <QMutex>
namespace win32_joy_impl {
static constexpr inline unsigned max_buttons = std::size(DIJOYSTATE2().rgbButtons);
static constexpr inline unsigned max_pov_hats = std::size(DIJOYSTATE2().rgdwPOV);
static constexpr inline unsigned pov_hat_directions = 8;
// cf. https://docs.microsoft.com/en-us/previous-versions/windows/desktop/ee416628(v=vs.85)
// see also remarks on the page
// no need to check for pos == unsigned(-1) || pos == 0xffff,
// this logic doesn't require that
static constexpr inline unsigned value_per_pov_hat_direction = 36000 / pov_hat_directions;
static constexpr inline unsigned max_buttons_and_pov_hats = max_buttons + max_pov_hats * pov_hat_directions;
//static_assert(pov_hat_directions == 4 || pov_hat_directions == 8);
// XXX how many axis update events can we reasonably get in a short time frame?
static constexpr inline unsigned num_buffers = 16;
//#define WIN32_JOY_DEBUG
struct OTR_DINPUT_EXPORT win32_joy_ctx final
{
using fn = std::function<void(const QString& guid, int btn, bool held)>;
struct joy final
{
LPDIRECTINPUTDEVICE8 joy_handle;
QString guid, name;
bool last_state[max_buttons_and_pov_hats] {};
Timer first_timer;
static DIDEVICEOBJECTDATA keystate_buffers[num_buffers];
joy(LPDIRECTINPUTDEVICE8 handle, const QString& guid, const QString& name);
~joy();
void release();
bool poll(fn const& f);
};
using joys_t = std::unordered_map<QString, std::shared_ptr<joy>>;
static constexpr inline int joy_axis_size = 65536;
struct joy_info
{
QString name, guid;
};
void poll(fn const& f);
bool poll_axis(const QString& guid, int* axes);
std::vector<joy_info> get_joy_info();
win32_joy_ctx(const win32_joy_ctx&) = delete;
win32_joy_ctx& operator=(const win32_joy_ctx&) = delete;
win32_joy_ctx();
void refresh();
private:
static QString guid_to_string(const GUID& guid);
class OTR_DINPUT_EXPORT enum_state final
{
std::vector<QString> all;
joys_t joys;
di_t di {};
static BOOL CALLBACK EnumJoysticksCallback(const DIDEVICEINSTANCE* pdidInstance, VOID* pContext);
static BOOL CALLBACK EnumObjectsCallback(const DIDEVICEOBJECTINSTANCE* pdidoi, VOID* ctx);
public:
static QMutex mtx;
enum_state();
~enum_state();
void refresh();
const joys_t& get_joys() const;
enum_state(enum_state const&) = delete;
};
static enum_state enumerator;
};
} // ns win32_joy_impl
using win32_joy_ctx = win32_joy_impl::win32_joy_ctx;
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