Let us start here, from square one. No, from Zero!
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smpn2
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// enable touch functions - set version to windows 7
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// mingw otherwise doesn't load touch stuff
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#define _WIN32_WINNT 0x0601
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#include "wintouchemu.h"
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#include <algorithm>
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#include <optional>
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#include "hooks/graphics/graphics.h"
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#include "overlay/overlay.h"
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#include "touch/touch.h"
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#include "util/detour.h"
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#include "util/logging.h"
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#include "util/time.h"
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#include "util/utils.h"
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namespace wintouchemu {
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// settings
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bool FORCE = false;
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bool LOG_FPS = false;
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static inline bool is_emu_enabled() {
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return FORCE || !is_touch_available() || GRAPHICS_SHOW_CURSOR;
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}
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static decltype(GetSystemMetrics) *GetSystemMetrics_orig = nullptr;
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static decltype(RegisterTouchWindow) *RegisterTouchWindow_orig = nullptr;
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static int WINAPI GetSystemMetrics_hook(int nIndex) {
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/*
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* fake touch screen
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* the game requires 0x01 and 0x02 flags to be set
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* 0x40 and 0x80 are set for completeness
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*/
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if (nIndex == 94)
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return 0x01 | 0x02 | 0x40 | 0x80;
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// call original
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if (GetSystemMetrics_orig != nullptr) {
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return GetSystemMetrics_orig(nIndex);
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}
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// return error
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return 0;
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}
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static BOOL WINAPI RegisterTouchWindow_hook(HWND hwnd, ULONG ulFlags) {
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// don't register it if the emu is enabled
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if (is_emu_enabled()) {
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return true;
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}
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// call default
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return RegisterTouchWindow_orig(hwnd, ulFlags);
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}
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// state
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BOOL (WINAPI *GetTouchInputInfo_orig)(HANDLE, UINT, PTOUCHINPUT, int);
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bool USE_MOUSE = false;
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std::vector<TouchEvent> TOUCH_EVENTS;
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std::vector<TouchPoint> TOUCH_POINTS;
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HMODULE HOOKED_MODULE = nullptr;
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std::string WINDOW_TITLE_START = "";
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std::optional<std::string> WINDOW_TITLE_END = std::nullopt;
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bool INITIALIZED = false;
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void hook(const char *window_title, HMODULE module) {
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// hooks
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auto system_metrics_hook = detour::iat_try(
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"GetSystemMetrics", GetSystemMetrics_hook, module);
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auto register_touch_window_hook = detour::iat_try(
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"RegisterTouchWindow", RegisterTouchWindow_hook, module);
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// don't hook twice
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if (GetSystemMetrics_orig == nullptr) {
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GetSystemMetrics_orig = system_metrics_hook;
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}
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if (RegisterTouchWindow_orig == nullptr) {
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RegisterTouchWindow_orig = register_touch_window_hook;
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}
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// set module and title
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HOOKED_MODULE = module;
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WINDOW_TITLE_START = window_title;
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INITIALIZED = true;
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}
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void hook_title_ends(const char *window_title_start, const char *window_title_end, HMODULE module) {
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hook(window_title_start, module);
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WINDOW_TITLE_END = window_title_end;
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}
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static BOOL WINAPI GetTouchInputInfoHook(HANDLE hTouchInput, UINT cInputs, PTOUCHINPUT pInputs, int cbSize) {
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// check if original should be called
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if (hTouchInput != GetTouchInputInfoHook) {
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return GetTouchInputInfo_orig(hTouchInput, cInputs, pInputs, cbSize);
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}
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// set touch inputs
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bool result = false;
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bool mouse_used = false;
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static bool mouse_state_old = false;
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for (UINT input = 0; input < cInputs; input++) {
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auto *touch_input = &pInputs[input];
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// clear touch input
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touch_input->x = 0;
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touch_input->y = 0;
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touch_input->hSource = nullptr;
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touch_input->dwID = 0;
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touch_input->dwFlags = 0;
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touch_input->dwMask = 0;
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touch_input->dwTime = 0;
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touch_input->dwExtraInfo = 0;
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touch_input->cxContact = 0;
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touch_input->cyContact = 0;
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// get touch event
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TouchEvent *touch_event = nullptr;
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if (TOUCH_EVENTS.size() > input) {
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touch_event = &TOUCH_EVENTS.at(input);
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}
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// check touch point
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if (touch_event) {
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// set touch point
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result = true;
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touch_input->x = touch_event->x * 100;
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touch_input->y = touch_event->y * 100;
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touch_input->hSource = hTouchInput;
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touch_input->dwID = touch_event->id;
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touch_input->dwFlags = 0;
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switch (touch_event->type) {
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case TOUCH_DOWN:
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touch_input->dwFlags |= TOUCHEVENTF_DOWN;
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break;
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case TOUCH_MOVE:
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touch_input->dwFlags |= TOUCHEVENTF_MOVE;
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break;
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case TOUCH_UP:
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touch_input->dwFlags |= TOUCHEVENTF_UP;
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break;
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}
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touch_input->dwMask = 0;
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touch_input->dwTime = 0;
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touch_input->dwExtraInfo = 0;
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touch_input->cxContact = 0;
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touch_input->cyContact = 0;
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} else if (USE_MOUSE && !mouse_used) {
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// disable further mouse inputs this call
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mouse_used = true;
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// get mouse state
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bool mouse_state = (GetKeyState(VK_LBUTTON) & 0x100) != 0;
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// check event needs to be generated
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if (mouse_state || mouse_state_old) {
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// get current cursor position
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POINT cursorPos {};
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GetCursorPos(&cursorPos);
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// set touch input to mouse
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result = true;
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touch_input->x = cursorPos.x * 100;
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touch_input->y = cursorPos.y * 100;
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touch_input->hSource = hTouchInput;
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touch_input->dwID = 0;
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touch_input->dwFlags = 0;
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if (mouse_state && !mouse_state_old) {
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touch_input->dwFlags |= TOUCHEVENTF_DOWN;
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} else if (mouse_state && mouse_state_old) {
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touch_input->dwFlags |= TOUCHEVENTF_MOVE;
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} else if (!mouse_state && mouse_state_old) {
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touch_input->dwFlags |= TOUCHEVENTF_UP;
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}
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touch_input->dwMask = 0;
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touch_input->dwTime = 0;
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touch_input->dwExtraInfo = 0;
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touch_input->cxContact = 0;
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touch_input->cyContact = 0;
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}
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// save old state
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mouse_state_old = mouse_state;
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} else {
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/*
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* For some reason, Nostalgia won't show an active touch point unless a move event
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* triggers in the same frame. To work around this, we just supply a fake move
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* event if we didn't update the same pointer ID in the same call.
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*/
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// find touch point which has no associated input event
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TouchPoint *touch_point = nullptr;
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for (auto &tp : TOUCH_POINTS) {
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bool found = false;
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for (UINT i = 0; i < cInputs; i++) {
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if (input > 0 && pInputs[i].dwID == tp.id) {
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found = true;
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break;
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}
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}
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if (!found) {
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touch_point = &tp;
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break;
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}
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}
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// check if unused touch point was found
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if (touch_point) {
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// set touch point
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result = true;
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touch_input->x = touch_point->x * 100;
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touch_input->y = touch_point->y * 100;
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touch_input->hSource = hTouchInput;
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touch_input->dwID = touch_point->id;
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touch_input->dwFlags = 0;
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touch_input->dwFlags |= TOUCHEVENTF_MOVE;
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touch_input->dwMask = 0;
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touch_input->dwTime = 0;
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touch_input->dwExtraInfo = 0;
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touch_input->cxContact = 0;
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touch_input->cyContact = 0;
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}
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}
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}
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// return success
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return result;
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}
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void update() {
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// check if initialized
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if (!INITIALIZED) {
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return;
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}
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// no need for hooks if touch is available
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if (!is_emu_enabled()) {
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return;
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}
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// get window handle
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static HWND hWnd = nullptr;
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if (hWnd == nullptr) {
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// start with the active foreground window
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hWnd = GetForegroundWindow();
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auto title = get_window_title(hWnd);
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// if the foreground window does not match the window title start, find a window
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// that does
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if (!string_begins_with(title, WINDOW_TITLE_START)) {
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hWnd = FindWindowBeginsWith(WINDOW_TITLE_START);
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title = get_window_title(hWnd);
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}
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// if a window title end is set, check to see if it matches
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if (WINDOW_TITLE_END.has_value() && !string_ends_with(title.c_str(), WINDOW_TITLE_END.value().c_str())) {
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hWnd = nullptr;
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title = "";
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for (auto &window : find_windows_beginning_with(WINDOW_TITLE_START)) {
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auto check_title = get_window_title(window);
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if (string_ends_with(check_title.c_str(), WINDOW_TITLE_END.value().c_str())) {
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hWnd = std::move(window);
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title = std::move(check_title);
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break;
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}
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}
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}
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// check window
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if (hWnd == nullptr) {
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return;
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}
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// check if windowed
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if (GRAPHICS_WINDOWED) {
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log_info("wintouchemu", "activating window hooks");
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// get client size
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RECT rect {};
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GetClientRect(hWnd, &rect);
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// remove style borders
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LONG lStyle = GetWindowLong(hWnd, GWL_STYLE);
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lStyle &= ~(WS_CAPTION | WS_THICKFRAME | WS_MINIMIZE | WS_MAXIMIZE | WS_SYSMENU);
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SetWindowLongPtr(hWnd, GWL_STYLE, lStyle);
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// remove ex style borders
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LONG lExStyle = GetWindowLong(hWnd, GWL_EXSTYLE);
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lExStyle &= ~(WS_EX_DLGMODALFRAME | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE);
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SetWindowLongPtr(hWnd, GWL_EXSTYLE, lExStyle);
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// update window
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AdjustWindowRect(&rect, lStyle, FALSE);
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SetWindowPos(hWnd, nullptr, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
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SWP_FRAMECHANGED | SWP_NOZORDER | SWP_NOOWNERZORDER);
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// create touch window - create overlay if not yet existing at this point
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touch_create_wnd(hWnd, overlay::ENABLED && !overlay::OVERLAY);
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USE_MOUSE = false;
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} else {
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log_info("wintouchemu", "activating DirectX hooks");
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// mouse position based input only
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touch_attach_dx_hook();
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USE_MOUSE = true;
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}
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// hooks
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auto GetTouchInputInfo_orig_new = detour::iat_try(
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"GetTouchInputInfo", GetTouchInputInfoHook, HOOKED_MODULE);
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if (GetTouchInputInfo_orig == nullptr) {
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GetTouchInputInfo_orig = GetTouchInputInfo_orig_new;
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}
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}
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// update touch events
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if (hWnd != nullptr) {
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// get touch events
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TOUCH_EVENTS.clear();
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touch_get_events(TOUCH_EVENTS);
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// get touch points
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TOUCH_POINTS.clear();
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touch_get_points(TOUCH_POINTS);
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// get event count
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auto event_count = TOUCH_EVENTS.size();
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if (USE_MOUSE) {
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event_count++;
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}
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// for the fake move events
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event_count += MAX(0, (int) (TOUCH_POINTS.size() - TOUCH_EVENTS.size()));
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// check if new events are available
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if (event_count > 0) {
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// send fake event to make the game update it's touch inputs
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auto wndProc = (WNDPROC) GetWindowLongPtr(hWnd, GWLP_WNDPROC);
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wndProc(hWnd, WM_TOUCH, MAKEWORD(event_count, 0), (LPARAM) GetTouchInputInfoHook);
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}
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// update frame logging
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if (LOG_FPS) {
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static int log_frames = 0;
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static uint64_t log_time = 0;
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log_frames++;
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if (log_time < get_system_seconds()) {
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if (log_time > 0) {
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log_info("wintouchemu", "polling at {} touch frames per second", log_frames);
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}
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log_frames = 0;
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log_time = get_system_seconds();
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}
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}
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}
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}
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}
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