// Based on "imgui/backends/imgui_impl_sdl.cpp" (SDL3 support added on top of the original SDL2 backend)
#if defined(WITH_IMGUI) && (defined(WITH_SDL2) || defined(WITH_SDL3))

#include "ImGuiSdlInput.h"
#include "SdlGfxDevice.h"
#include "../Input/ImGuiJoyMappedInput.h"

#if defined(WITH_SDL2)
// SDL3 removed SDL_syswm.h; native handles are read from the window property store instead (see below)
#	if defined(__HAS_LOCAL_SDL)
#		include "SDL2/SDL_syswm.h"
#	else
#		include <SDL_syswm.h>
#	endif
#endif

#if defined(WITH_SDL3)
// SDL2 -> SDL3 renamed the game-controller/gamepad API, the system-cursor and event-type enums, the keymod
// flags and a couple of letter/punctuation keycodes, mostly keeping signatures identical. These shims keep the
// shared body below readable; only genuinely divergent spots (removed APIs, float coordinates, flattened window
// events, changed return conventions) are handled with explicit #if forks. Most of these names are also mapped
// in <SDL3/SDL_oldnames.h> (as sentinels when old names are disabled), so #undef them first to avoid
// redefinition warnings.
#undef SDL_GameControllerGetButton
#undef SDL_GameControllerGetAxis
#undef SDL_GameControllerClose
#undef SDL_GameControllerOpen
#undef SDL_IsGameController
#undef SDL_GameControllerButton
#undef SDL_GameControllerAxis
#undef SDL_CONTROLLER_BUTTON_START
#undef SDL_CONTROLLER_BUTTON_BACK
#undef SDL_CONTROLLER_BUTTON_X
#undef SDL_CONTROLLER_BUTTON_B
#undef SDL_CONTROLLER_BUTTON_Y
#undef SDL_CONTROLLER_BUTTON_A
#undef SDL_CONTROLLER_BUTTON_DPAD_LEFT
#undef SDL_CONTROLLER_BUTTON_DPAD_RIGHT
#undef SDL_CONTROLLER_BUTTON_DPAD_UP
#undef SDL_CONTROLLER_BUTTON_DPAD_DOWN
#undef SDL_CONTROLLER_BUTTON_LEFTSHOULDER
#undef SDL_CONTROLLER_BUTTON_RIGHTSHOULDER
#undef SDL_CONTROLLER_BUTTON_LEFTSTICK
#undef SDL_CONTROLLER_BUTTON_RIGHTSTICK
#undef SDL_CONTROLLER_AXIS_TRIGGERLEFT
#undef SDL_CONTROLLER_AXIS_TRIGGERRIGHT
#undef SDL_CONTROLLER_AXIS_LEFTX
#undef SDL_CONTROLLER_AXIS_LEFTY
#undef SDL_CONTROLLER_AXIS_RIGHTX
#undef SDL_CONTROLLER_AXIS_RIGHTY
#undef SDL_CONTROLLERDEVICEADDED
#undef SDL_CONTROLLERDEVICEREMOVED
#undef SDL_SYSTEM_CURSOR_ARROW
#undef SDL_SYSTEM_CURSOR_IBEAM
#undef SDL_SYSTEM_CURSOR_SIZEALL
#undef SDL_SYSTEM_CURSOR_SIZENS
#undef SDL_SYSTEM_CURSOR_SIZEWE
#undef SDL_SYSTEM_CURSOR_SIZENESW
#undef SDL_SYSTEM_CURSOR_SIZENWSE
#undef SDL_SYSTEM_CURSOR_HAND
#undef SDL_SYSTEM_CURSOR_NO
#undef SDL_MOUSEMOTION
#undef SDL_MOUSEWHEEL
#undef SDL_MOUSEBUTTONDOWN
#undef SDL_MOUSEBUTTONUP
#undef SDL_TEXTINPUT
#undef SDL_KEYDOWN
#undef SDL_KEYUP
#undef SDL_FreeCursor
#undef SDL_GL_DeleteContext
#undef KMOD_CTRL
#undef KMOD_SHIFT
#undef KMOD_ALT
#undef KMOD_GUI
#define SDL_GameControllerGetButton  SDL_GetGamepadButton
#define SDL_GameControllerGetAxis    SDL_GetGamepadAxis
#define SDL_GameControllerClose      SDL_CloseGamepad
#define SDL_GameControllerOpen       SDL_OpenGamepad
#define SDL_IsGameController          SDL_IsGamepad
#define SDL_GameControllerButton     SDL_GamepadButton
#define SDL_GameControllerAxis       SDL_GamepadAxis
#define SDL_CONTROLLER_BUTTON_START        SDL_GAMEPAD_BUTTON_START
#define SDL_CONTROLLER_BUTTON_BACK         SDL_GAMEPAD_BUTTON_BACK
#define SDL_CONTROLLER_BUTTON_X            SDL_GAMEPAD_BUTTON_WEST
#define SDL_CONTROLLER_BUTTON_B            SDL_GAMEPAD_BUTTON_EAST
#define SDL_CONTROLLER_BUTTON_Y            SDL_GAMEPAD_BUTTON_NORTH
#define SDL_CONTROLLER_BUTTON_A            SDL_GAMEPAD_BUTTON_SOUTH
#define SDL_CONTROLLER_BUTTON_DPAD_LEFT    SDL_GAMEPAD_BUTTON_DPAD_LEFT
#define SDL_CONTROLLER_BUTTON_DPAD_RIGHT   SDL_GAMEPAD_BUTTON_DPAD_RIGHT
#define SDL_CONTROLLER_BUTTON_DPAD_UP      SDL_GAMEPAD_BUTTON_DPAD_UP
#define SDL_CONTROLLER_BUTTON_DPAD_DOWN    SDL_GAMEPAD_BUTTON_DPAD_DOWN
#define SDL_CONTROLLER_BUTTON_LEFTSHOULDER  SDL_GAMEPAD_BUTTON_LEFT_SHOULDER
#define SDL_CONTROLLER_BUTTON_RIGHTSHOULDER SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER
#define SDL_CONTROLLER_BUTTON_LEFTSTICK    SDL_GAMEPAD_BUTTON_LEFT_STICK
#define SDL_CONTROLLER_BUTTON_RIGHTSTICK   SDL_GAMEPAD_BUTTON_RIGHT_STICK
#define SDL_CONTROLLER_AXIS_TRIGGERLEFT    SDL_GAMEPAD_AXIS_LEFT_TRIGGER
#define SDL_CONTROLLER_AXIS_TRIGGERRIGHT   SDL_GAMEPAD_AXIS_RIGHT_TRIGGER
#define SDL_CONTROLLER_AXIS_LEFTX          SDL_GAMEPAD_AXIS_LEFTX
#define SDL_CONTROLLER_AXIS_LEFTY          SDL_GAMEPAD_AXIS_LEFTY
#define SDL_CONTROLLER_AXIS_RIGHTX         SDL_GAMEPAD_AXIS_RIGHTX
#define SDL_CONTROLLER_AXIS_RIGHTY         SDL_GAMEPAD_AXIS_RIGHTY
#define SDL_CONTROLLERDEVICEADDED    SDL_EVENT_GAMEPAD_ADDED
#define SDL_CONTROLLERDEVICEREMOVED  SDL_EVENT_GAMEPAD_REMOVED
#define SDL_SYSTEM_CURSOR_ARROW      SDL_SYSTEM_CURSOR_DEFAULT
#define SDL_SYSTEM_CURSOR_IBEAM      SDL_SYSTEM_CURSOR_TEXT
#define SDL_SYSTEM_CURSOR_SIZEALL    SDL_SYSTEM_CURSOR_MOVE
#define SDL_SYSTEM_CURSOR_SIZENS     SDL_SYSTEM_CURSOR_NS_RESIZE
#define SDL_SYSTEM_CURSOR_SIZEWE     SDL_SYSTEM_CURSOR_EW_RESIZE
#define SDL_SYSTEM_CURSOR_SIZENESW   SDL_SYSTEM_CURSOR_NESW_RESIZE
#define SDL_SYSTEM_CURSOR_SIZENWSE   SDL_SYSTEM_CURSOR_NWSE_RESIZE
#define SDL_SYSTEM_CURSOR_HAND       SDL_SYSTEM_CURSOR_POINTER
#define SDL_SYSTEM_CURSOR_NO         SDL_SYSTEM_CURSOR_NOT_ALLOWED
#define SDL_MOUSEMOTION       SDL_EVENT_MOUSE_MOTION
#define SDL_MOUSEWHEEL        SDL_EVENT_MOUSE_WHEEL
#define SDL_MOUSEBUTTONDOWN   SDL_EVENT_MOUSE_BUTTON_DOWN
#define SDL_MOUSEBUTTONUP     SDL_EVENT_MOUSE_BUTTON_UP
#define SDL_TEXTINPUT         SDL_EVENT_TEXT_INPUT
#define SDL_KEYDOWN           SDL_EVENT_KEY_DOWN
#define SDL_KEYUP             SDL_EVENT_KEY_UP
#define SDL_FreeCursor        SDL_DestroyCursor
#define SDL_GL_DeleteContext  SDL_GL_DestroyContext
#define KMOD_CTRL   SDL_KMOD_CTRL
#define KMOD_SHIFT  SDL_KMOD_SHIFT
#define KMOD_ALT    SDL_KMOD_ALT
#define KMOD_GUI    SDL_KMOD_GUI
#define SDLK_a SDLK_A
#define SDLK_b SDLK_B
#define SDLK_c SDLK_C
#define SDLK_d SDLK_D
#define SDLK_e SDLK_E
#define SDLK_f SDLK_F
#define SDLK_g SDLK_G
#define SDLK_h SDLK_H
#define SDLK_i SDLK_I
#define SDLK_j SDLK_J
#define SDLK_k SDLK_K
#define SDLK_l SDLK_L
#define SDLK_m SDLK_M
#define SDLK_n SDLK_N
#define SDLK_o SDLK_O
#define SDLK_p SDLK_P
#define SDLK_q SDLK_Q
#define SDLK_r SDLK_R
#define SDLK_s SDLK_S
#define SDLK_t SDLK_T
#define SDLK_u SDLK_U
#define SDLK_v SDLK_V
#define SDLK_w SDLK_W
#define SDLK_x SDLK_X
#define SDLK_y SDLK_Y
#define SDLK_z SDLK_Z
#define SDLK_QUOTE     SDLK_APOSTROPHE
#define SDLK_BACKQUOTE SDLK_GRAVE
#endif

#if SDL_VERSION_ATLEAST(2, 0, 4) && !defined(DEATH_TARGET_EMSCRIPTEN) && !defined(DEATH_TARGET_ANDROID) && !(defined(DEATH_TARGET_APPLE) && TARGET_OS_IOS)
#	define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 1
#else
#	define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 0
#endif
#define SDL_HAS_PER_MONITOR_DPI	SDL_VERSION_ATLEAST(2, 0, 4)
#define SDL_HAS_ALWAYS_ON_TOP	SDL_VERSION_ATLEAST(2, 0, 5)
#define SDL_HAS_USABLE_DISPLAY_BOUNDS	SDL_VERSION_ATLEAST(2, 0, 5)
#define SDL_HAS_VULKAN			SDL_VERSION_ATLEAST(2, 0, 6)
#define SDL_HAS_WINDOW_ALPHA	SDL_VERSION_ATLEAST(2, 0, 5)
#define SDL_HAS_DISPLAY_EVENT	SDL_VERSION_ATLEAST(2, 0, 9)
#define SDL_HAS_SHOW_WINDOW_ACTIVATION_HINT	SDL_VERSION_ATLEAST(2, 0, 18)

#if SDL_HAS_VULKAN && defined(WITH_SDL2)
extern "C" { extern DECLSPEC void SDLCALL SDL_Vulkan_GetDrawableSize(SDL_Window* window, int* w, int* h); }
#endif

#if defined(IMGUI_HAS_VIEWPORT) && defined(DEATH_TARGET_WINDOWS)
extern "C" IMAGE_DOS_HEADER __ImageBase;
#endif

namespace nCine::Backends
{
	namespace
	{
		struct ViewportData
		{
			SDL_Window* Window;
			Uint32 WindowID;       // Stored in ImGuiViewport::PlatformHandle. Use SDL_GetWindowFromID() to get SDL_Window* from Uint32 WindowID.
			bool WindowOwned;
			SDL_GLContext GLContext;

			ViewportData() : Window(nullptr), WindowID(0), WindowOwned(false), GLContext(nullptr)
			{
			}

			~ViewportData()
			{
				IM_ASSERT(Window == nullptr && GLContext == nullptr);
			}
		};

#if defined(IMGUI_HAS_VIEWPORT)
#	if defined(DEATH_TARGET_WINDOWS)
		HICON windowIcon = NULL;
		HICON windowIconSmall = NULL;
#	endif

		static ImGuiViewport* getViewportForWindowID(Uint32 windowId)
		{
			return ImGui::FindViewportByPlatformHandle((void*)(intptr_t)windowId);
		}
#endif

		void setClipboardText(ImGuiContext* ctx, const char* text)
		{
			SDL_SetClipboardText(text);
		}

		// Note: native IME will only display if user calls SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1") _before_ SDL_CreateWindow().
		void setPlatformImeData(ImGuiContext* ctx, ImGuiViewport* viewport, ImGuiPlatformImeData* data)
		{
			if (data->WantVisible) {
				SDL_Rect r;
				r.x = static_cast<int>(data->InputPos.x);
				r.y = static_cast<int>(data->InputPos.y);
				r.w = 1;
				r.h = static_cast<int>(data->InputLineHeight);
#if defined(WITH_SDL3)
				// SDL3: SDL_SetTextInputRect -> SDL_SetTextInputArea (per-window, plus a cursor offset)
				SDL_Window* imeWindow = SDL_GetKeyboardFocus();
				if (imeWindow != nullptr) {
					SDL_SetTextInputArea(imeWindow, &r, 0);
				}
#else
				SDL_SetTextInputRect(&r);
#endif
			}
		}

		ImGuiKey sdlKeycodeToImGuiKey(int keycode)
		{
			switch (keycode) {
				case SDLK_TAB: return ImGuiKey_Tab;
				case SDLK_LEFT: return ImGuiKey_LeftArrow;
				case SDLK_RIGHT: return ImGuiKey_RightArrow;
				case SDLK_UP: return ImGuiKey_UpArrow;
				case SDLK_DOWN: return ImGuiKey_DownArrow;
				case SDLK_PAGEUP: return ImGuiKey_PageUp;
				case SDLK_PAGEDOWN: return ImGuiKey_PageDown;
				case SDLK_HOME: return ImGuiKey_Home;
				case SDLK_END: return ImGuiKey_End;
				case SDLK_INSERT: return ImGuiKey_Insert;
				case SDLK_DELETE: return ImGuiKey_Delete;
				case SDLK_BACKSPACE: return ImGuiKey_Backspace;
				case SDLK_SPACE: return ImGuiKey_Space;
				case SDLK_RETURN: return ImGuiKey_Enter;
				case SDLK_ESCAPE: return ImGuiKey_Escape;
				case SDLK_QUOTE: return ImGuiKey_Apostrophe;
				case SDLK_COMMA: return ImGuiKey_Comma;
				case SDLK_MINUS: return ImGuiKey_Minus;
				case SDLK_PERIOD: return ImGuiKey_Period;
				case SDLK_SLASH: return ImGuiKey_Slash;
				case SDLK_SEMICOLON: return ImGuiKey_Semicolon;
				case SDLK_EQUALS: return ImGuiKey_Equal;
				case SDLK_LEFTBRACKET: return ImGuiKey_LeftBracket;
				case SDLK_BACKSLASH: return ImGuiKey_Backslash;
				case SDLK_RIGHTBRACKET: return ImGuiKey_RightBracket;
				case SDLK_BACKQUOTE: return ImGuiKey_GraveAccent;
				case SDLK_CAPSLOCK: return ImGuiKey_CapsLock;
				case SDLK_SCROLLLOCK: return ImGuiKey_ScrollLock;
				case SDLK_NUMLOCKCLEAR: return ImGuiKey_NumLock;
				case SDLK_PRINTSCREEN: return ImGuiKey_PrintScreen;
				case SDLK_PAUSE: return ImGuiKey_Pause;
				case SDLK_KP_0: return ImGuiKey_Keypad0;
				case SDLK_KP_1: return ImGuiKey_Keypad1;
				case SDLK_KP_2: return ImGuiKey_Keypad2;
				case SDLK_KP_3: return ImGuiKey_Keypad3;
				case SDLK_KP_4: return ImGuiKey_Keypad4;
				case SDLK_KP_5: return ImGuiKey_Keypad5;
				case SDLK_KP_6: return ImGuiKey_Keypad6;
				case SDLK_KP_7: return ImGuiKey_Keypad7;
				case SDLK_KP_8: return ImGuiKey_Keypad8;
				case SDLK_KP_9: return ImGuiKey_Keypad9;
				case SDLK_KP_PERIOD: return ImGuiKey_KeypadDecimal;
				case SDLK_KP_DIVIDE: return ImGuiKey_KeypadDivide;
				case SDLK_KP_MULTIPLY: return ImGuiKey_KeypadMultiply;
				case SDLK_KP_MINUS: return ImGuiKey_KeypadSubtract;
				case SDLK_KP_PLUS: return ImGuiKey_KeypadAdd;
				case SDLK_KP_ENTER: return ImGuiKey_KeypadEnter;
				case SDLK_KP_EQUALS: return ImGuiKey_KeypadEqual;
				case SDLK_LCTRL: return ImGuiKey_LeftCtrl;
				case SDLK_LSHIFT: return ImGuiKey_LeftShift;
				case SDLK_LALT: return ImGuiKey_LeftAlt;
				case SDLK_LGUI: return ImGuiKey_LeftSuper;
				case SDLK_RCTRL: return ImGuiKey_RightCtrl;
				case SDLK_RSHIFT: return ImGuiKey_RightShift;
				case SDLK_RALT: return ImGuiKey_RightAlt;
				case SDLK_RGUI: return ImGuiKey_RightSuper;
				case SDLK_APPLICATION: return ImGuiKey_Menu;
				case SDLK_0: return ImGuiKey_0;
				case SDLK_1: return ImGuiKey_1;
				case SDLK_2: return ImGuiKey_2;
				case SDLK_3: return ImGuiKey_3;
				case SDLK_4: return ImGuiKey_4;
				case SDLK_5: return ImGuiKey_5;
				case SDLK_6: return ImGuiKey_6;
				case SDLK_7: return ImGuiKey_7;
				case SDLK_8: return ImGuiKey_8;
				case SDLK_9: return ImGuiKey_9;
				case SDLK_a: return ImGuiKey_A;
				case SDLK_b: return ImGuiKey_B;
				case SDLK_c: return ImGuiKey_C;
				case SDLK_d: return ImGuiKey_D;
				case SDLK_e: return ImGuiKey_E;
				case SDLK_f: return ImGuiKey_F;
				case SDLK_g: return ImGuiKey_G;
				case SDLK_h: return ImGuiKey_H;
				case SDLK_i: return ImGuiKey_I;
				case SDLK_j: return ImGuiKey_J;
				case SDLK_k: return ImGuiKey_K;
				case SDLK_l: return ImGuiKey_L;
				case SDLK_m: return ImGuiKey_M;
				case SDLK_n: return ImGuiKey_N;
				case SDLK_o: return ImGuiKey_O;
				case SDLK_p: return ImGuiKey_P;
				case SDLK_q: return ImGuiKey_Q;
				case SDLK_r: return ImGuiKey_R;
				case SDLK_s: return ImGuiKey_S;
				case SDLK_t: return ImGuiKey_T;
				case SDLK_u: return ImGuiKey_U;
				case SDLK_v: return ImGuiKey_V;
				case SDLK_w: return ImGuiKey_W;
				case SDLK_x: return ImGuiKey_X;
				case SDLK_y: return ImGuiKey_Y;
				case SDLK_z: return ImGuiKey_Z;
				case SDLK_F1: return ImGuiKey_F1;
				case SDLK_F2: return ImGuiKey_F2;
				case SDLK_F3: return ImGuiKey_F3;
				case SDLK_F4: return ImGuiKey_F4;
				case SDLK_F5: return ImGuiKey_F5;
				case SDLK_F6: return ImGuiKey_F6;
				case SDLK_F7: return ImGuiKey_F7;
				case SDLK_F8: return ImGuiKey_F8;
				case SDLK_F9: return ImGuiKey_F9;
				case SDLK_F10: return ImGuiKey_F10;
				case SDLK_F11: return ImGuiKey_F11;
				case SDLK_F12: return ImGuiKey_F12;
			}
			return ImGuiKey_None;
		}

		void updateKeyModifiers(SDL_Keymod sdlKeyMods)
		{
			ImGuiIO& io = ImGui::GetIO();
			io.AddKeyEvent(ImGuiMod_Ctrl, (sdlKeyMods & KMOD_CTRL) != 0);
			io.AddKeyEvent(ImGuiMod_Shift, (sdlKeyMods & KMOD_SHIFT) != 0);
			io.AddKeyEvent(ImGuiMod_Alt, (sdlKeyMods & KMOD_ALT) != 0);
			io.AddKeyEvent(ImGuiMod_Super, (sdlKeyMods & KMOD_GUI) != 0);
		}

		void updateGamepadButton(ImVector<SDL_GameController*>& gamepads, ImGuiIO& io, ImGuiKey key, SDL_GameControllerButton buttonNo)
		{
			bool mergedValue = false;
			for (SDL_GameController* gamepad : gamepads)
				mergedValue |= SDL_GameControllerGetButton(gamepad, buttonNo) != 0;
			io.AddKeyEvent(key, mergedValue);
		}

		float saturate(float v)
		{
			return (v < 0.0f ? 0.0f : (v > 1.0f ? 1.0f : v));
		}

		void updateGamepadAnalog(ImVector<SDL_GameController*>& gamepads, ImGuiIO& io, ImGuiKey key, SDL_GameControllerAxis axisNo, float v0, float v1)
		{
			float mergedValue = 0.0f;
			for (SDL_GameController* gamepad : gamepads) {
				const float vn = saturate(static_cast<float>(SDL_GameControllerGetAxis(gamepad, axisNo) - v0) / static_cast<float>(v1 - v0));
				if (mergedValue < vn) {
					mergedValue = vn;
				}
			}
			io.AddKeyAnalogEvent(key, mergedValue > 0.1f, mergedValue);
		}
	}

	bool ImGuiSdlInput::_inputEnabled = true;
	SDL_Window* ImGuiSdlInput::_window = nullptr;
	unsigned long int ImGuiSdlInput::_time = 0;
	char* ImGuiSdlInput::_clipboardTextData = nullptr;
	bool ImGuiSdlInput::_wantUpdateMonitors = false;
	unsigned int ImGuiSdlInput::_mouseWindowID = 0;
	int ImGuiSdlInput::_mouseButtonsDown = 0;
	SDL_Cursor* ImGuiSdlInput::_mouseCursors[ImGuiMouseCursor_COUNT] = {};
	SDL_Cursor* ImGuiSdlInput::_mouseLastCursor = nullptr;
	unsigned int ImGuiSdlInput::_mouseLastLeaveFrame = 0;
	bool ImGuiSdlInput::_mouseCanUseGlobalState = false;

	ImVector<SDL_GameController*> ImGuiSdlInput::_gamepads;
	ImGuiSdlInput::GamepadMode ImGuiSdlInput::_gamepadMode = ImGuiSdlInput::GamepadMode::AutoFirst;
	bool ImGuiSdlInput::_wantUpdateGamepadsList = false;

	void ImGuiSdlInput::init(SDL_Window* window, SDL_GLContext glContextHandle)
	{
		IMGUI_CHECKVERSION();
		ImGui::CreateContext();

		ImGuiIO& io = ImGui::GetIO();
		ImGuiPlatformIO& pio = ImGui::GetPlatformIO();

		// Check and store if we are on a SDL backend that supports global mouse position
		// ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
		_mouseCanUseGlobalState = false;
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
		const char* sdlBackend = SDL_GetCurrentVideoDriver();
		static const char* globalMouseWhitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
		for (int n = 0; n < IM_ARRAYSIZE(globalMouseWhitelist); n++) {
			if (strncmp(sdlBackend, globalMouseWhitelist[n], strlen(globalMouseWhitelist[n])) == 0) {
				_mouseCanUseGlobalState = true;
				break;
			}
		}
#endif

		// Setup backend capabilities flags
#if defined(WITH_SDL3)
		io.BackendPlatformName = "nCine_SDL3";
#else
		io.BackendPlatformName = "nCine_SDL2";
#endif
		io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
		io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)

		_window = window;

		pio.Platform_SetClipboardTextFn = setClipboardText;
		pio.Platform_GetClipboardTextFn = clipboardText;
		pio.Platform_ClipboardUserData = nullptr;
		pio.Platform_SetImeDataFn = setPlatformImeData;

#if defined(IMGUI_HAS_DOCK)
		// Update monitor a first time during init
		updateMonitors();
#endif

		// Gamepad handling
		_gamepadMode = GamepadMode::AutoFirst;
		_wantUpdateGamepadsList = true;

		// Load mouse cursors
		_mouseCursors[ImGuiMouseCursor_Arrow] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
		_mouseCursors[ImGuiMouseCursor_TextInput] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
		_mouseCursors[ImGuiMouseCursor_ResizeAll] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
		_mouseCursors[ImGuiMouseCursor_ResizeNS] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENS);
		_mouseCursors[ImGuiMouseCursor_ResizeEW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEWE);
		_mouseCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENESW);
		_mouseCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
		_mouseCursors[ImGuiMouseCursor_Hand] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_HAND);
		_mouseCursors[ImGuiMouseCursor_NotAllowed] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NO);

		// Set platform dependent data in viewport
		// Our mouse update function expect PlatformHandle to be filled for the main viewport
		ImGuiViewport* mainViewport = ImGui::GetMainViewport();
		mainViewport->PlatformHandleRaw = nullptr;
#if defined(WITH_SDL3)
		// SDL3 removed SDL_syswm.h; native window handles are read from the window property store
#	if defined(DEATH_TARGET_WINDOWS)
		mainViewport->PlatformHandleRaw = SDL_GetPointerProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_WIN32_HWND_POINTER, nullptr);
#	elif defined(DEATH_TARGET_APPLE)
		mainViewport->PlatformHandleRaw = SDL_GetPointerProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_COCOA_WINDOW_POINTER, nullptr);
#	endif
#else
		SDL_SysWMinfo info;
		SDL_VERSION(&info.version);
		if (SDL_GetWindowWMInfo(window, &info)) {
#if defined(SDL_VIDEO_DRIVER_WINDOWS)
			mainViewport->PlatformHandleRaw = (void*)info.info.win.window;
#elif defined(DEATH_TARGET_APPLE) && defined(SDL_VIDEO_DRIVER_COCOA)
			mainViewport->PlatformHandleRaw = (void*)info.info.cocoa.window;
#endif
		}
#endif

		// From 2.0.5: Set SDL hint to receive mouse click events on window focus, otherwise SDL doesn't emit the event.
		// Without this, when clicking to gain focus, our widgets wouldn't activate even though they showed as hovered.
		// (This is unfortunately a global SDL setting, so enabling it might have a side-effect on your application.
		// It is unlikely to make a difference, but if your app absolutely needs to ignore the initial on-focus click:
		// you can ignore SDL_MOUSEBUTTONDOWN events coming right after a SDL_WINDOWEVENT_FOCUS_GAINED)
#if defined(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH)
		SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1");
#endif

		// From 2.0.18: Enable native IME.
		// IMPORTANT: This is used at the time of SDL_CreateWindow() so this will only affects secondary windows, if any.
		// For the main window to be affected, your application needs to call this manually before calling SDL_CreateWindow().
#if defined(SDL_HINT_IME_SHOW_UI)
		SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");
#endif

		// From 2.0.22: Disable auto-capture, this is preventing drag and drop across multiple windows (see #5710)
#if defined(SDL_HINT_MOUSE_AUTO_CAPTURE)
		SDL_SetHint(SDL_HINT_MOUSE_AUTO_CAPTURE, "0");
#endif

#if defined(IMGUI_HAS_VIEWPORT)
		if (_mouseCanUseGlobalState) {
			io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports;

			// Register platform interface (will be coupled with a renderer interface)
			pio.Platform_CreateWindow = onCreateWindow;
			pio.Platform_DestroyWindow = onDestroyWindow;
			pio.Platform_ShowWindow = onShowWindow;
			pio.Platform_SetWindowPos = onSetWindowPos;
			pio.Platform_GetWindowPos = onGetWindowPos;
			pio.Platform_SetWindowSize = onSetWindowSize;
			pio.Platform_GetWindowSize = onGetWindowSize;
			pio.Platform_GetWindowFramebufferScale = onGetWindowFramebufferScale;
			pio.Platform_SetWindowFocus = onSetWindowFocus;
			pio.Platform_GetWindowFocus = onGetWindowFocus;
			pio.Platform_GetWindowMinimized = onGetWindowMinimized;
			pio.Platform_SetWindowTitle = onSetWindowTitle;
			pio.Platform_RenderWindow = onRenderWindow;
			pio.Platform_SwapBuffers = onSwapBuffers;
#	if SDL_HAS_WINDOW_ALPHA
			pio.Platform_SetWindowAlpha = onSetWindowAlpha;
#	endif
#	if SDL_HAS_VULKAN
			//pio.Platform_CreateVkSurface = onCreateVkSurface;
#	endif

			// Register main window handle (which is owned by the main application, not by us)
			// This is mostly for simplicity and consistency, so that our code (e.g., mouse handling etc.) can use same logic for main and secondary viewports.
			ImGuiViewport* mainViewport = ImGui::GetMainViewport();
			ViewportData* vd = IM_NEW(ViewportData)();
			vd->Window = window;
			vd->WindowID = SDL_GetWindowID(window);
			vd->WindowOwned = false;
			vd->GLContext = glContextHandle;
			mainViewport->PlatformUserData = vd;
			mainViewport->PlatformHandle = (void*)(std::intptr_t)vd->WindowID;

#	if defined(DEATH_TARGET_WINDOWS)
			HINSTANCE inst = ((HINSTANCE)&__ImageBase);
			windowIcon = (HICON)::LoadImage(inst, L"IMGUI_ICON", IMAGE_ICON, ::GetSystemMetrics(SM_CXICON), ::GetSystemMetrics(SM_CYICON), LR_DEFAULTSIZE);
			windowIconSmall = (HICON)::LoadImage(inst, L"IMGUI_ICON", IMAGE_ICON, ::GetSystemMetrics(SM_CXSMICON), ::GetSystemMetrics(SM_CYSMICON), LR_DEFAULTSIZE);
#	endif
		}
#endif
	}

	void ImGuiSdlInput::shutdown()
	{
#if defined(IMGUI_HAS_VIEWPORT)
		ImGui::DestroyPlatformWindows();
#endif

		_window = nullptr;

		// Destroy last known clipboard data
		if (_clipboardTextData)
			SDL_free(_clipboardTextData);
		_clipboardTextData = nullptr;

		// Destroy SDL mouse cursors
		for (ImGuiMouseCursor i = 0; i < ImGuiMouseCursor_COUNT; i++)
			SDL_FreeCursor(_mouseCursors[i]);
		closeGamepads();

		ImGuiIO& io = ImGui::GetIO();
		io.BackendPlatformName = nullptr;
		io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos | ImGuiBackendFlags_HasGamepad);

		ImGui::DestroyContext();
	}

	void ImGuiSdlInput::newFrame()
	{
		ImGuiIO& io = ImGui::GetIO();

		// Setup main viewport size (every frame to accommodate for window resizing)
		getWindowSizeAndFramebufferScale(_window, nullptr, &io.DisplaySize, &io.DisplayFramebufferScale);

#if defined(IMGUI_HAS_DOCK)
#	if !defined(DEATH_TARGET_WINDOWS)
		// Keep polling under Windows to handle changes of work area when resizing taskbar
		if (_wantUpdateMonitors)
#	endif
			updateMonitors();
#endif

		// Setup time step (we don't use SDL_GetTicks() because it is using millisecond resolution)
		// (Accept SDL_GetPerformanceCounter() not returning a monotonically increasing value. Happens in VMs and Emscripten, see #6189, #6114, #3644)
		static Uint64 frequency = SDL_GetPerformanceFrequency();
		Uint64 currentTime = SDL_GetPerformanceCounter();
		if (currentTime <= _time)
			currentTime = _time + 1;
		io.DeltaTime = _time > 0 ? static_cast<float>((static_cast<double>(currentTime - _time) / frequency)) : static_cast<float>(1.0f / 60.0f);
		_time = currentTime;

		if (_mouseLastLeaveFrame && _mouseLastLeaveFrame >= ImGui::GetFrameCount() && _mouseButtonsDown == 0) {
			_mouseWindowID = 0;
			_mouseLastLeaveFrame = 0;
			io.AddMousePosEvent(-FLT_MAX, -FLT_MAX);
		}

		updateMouseData();
		updateMouseCursor();

		// Update game controllers (if enabled and available)
		updateGamepads();
	}

	void ImGuiSdlInput::endFrame()
	{
#if defined(IMGUI_HAS_VIEWPORT)
		// Update and render additional Platform Windows
		ImGuiIO& io = ImGui::GetIO();
		if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) {
			ImGui::UpdatePlatformWindows();
			ImGui::RenderPlatformWindowsDefault();

			// Restore the OpenGL rendering context to the main window DC, since platform windows might have
			// changed it. Only the OpenGL backend has contexts to juggle - the others (Direct3D 11, Vulkan,
			// software) run on a context-less window, where this would just raise an SDL error.
			ImGuiViewport* mainViewport = ImGui::GetMainViewport();
			ViewportData* mainViewportData = (ViewportData*)mainViewport->PlatformUserData;
			if (mainViewportData != nullptr && mainViewportData->GLContext != nullptr) {
				SDL_GL_MakeCurrent(mainViewportData->Window, mainViewportData->GLContext);
			}
		}
#endif
	}

	// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
	// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
	// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
	// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
	// If you have multiple SDL events and some of them are not meant to be used by dear imgui, you may need to filter events based on their windowID field.
	bool ImGuiSdlInput::processEvent(const SDL_Event* event)
	{
		if (!_inputEnabled)
			return false;

		ImGuiIO& io = ImGui::GetIO();
		switch (event->type) {
			case SDL_MOUSEMOTION: {
				if (getViewportForWindowID(event->motion.windowID) == nullptr)
					return false;
				ImVec2 mousePos(static_cast<float>(event->motion.x), static_cast<float>(event->motion.y));
#if defined(IMGUI_HAS_VIEWPORT)
				if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) {
					int windowX, windowY;
					SDL_GetWindowPosition(SDL_GetWindowFromID(event->motion.windowID), &windowX, &windowY);
					mousePos.x += windowX;
					mousePos.y += windowY;
				}
#endif
				io.AddMouseSourceEvent(event->motion.which == SDL_TOUCH_MOUSEID ? ImGuiMouseSource_TouchScreen : ImGuiMouseSource_Mouse);
				io.AddMousePosEvent(mousePos.x, mousePos.y);
				return true;
			}
			case SDL_MOUSEWHEEL: {
				if (getViewportForWindowID(event->wheel.windowID) == nullptr)
					return false;
#if defined(WITH_SDL3)
				// SDL3: wheel deltas are always float (preciseX/preciseY were merged into x/y)
				float wheelX = -event->wheel.x;
				const float wheelY = event->wheel.y;
#elif SDL_VERSION_ATLEAST(2, 0, 18) // If this fails to compile on Emscripten: update to latest Emscripten!
				float wheelX = -event->wheel.preciseX;
				const float wheelY = event->wheel.preciseY;
#else
				float wheelX = static_cast<float>(-event->wheel.x);
				const float wheelY = static_cast<float>(event->wheel.y);
#endif
#if defined(DEATH_TARGET_EMSCRIPTEN)
				wheelX /= 100.0f;
#endif
				io.AddMouseSourceEvent(event->wheel.which == SDL_TOUCH_MOUSEID ? ImGuiMouseSource_TouchScreen : ImGuiMouseSource_Mouse);
				io.AddMouseWheelEvent(wheelX, wheelY);
				return true;
			}
			case SDL_MOUSEBUTTONDOWN:
			case SDL_MOUSEBUTTONUP: {
				if (getViewportForWindowID(event->button.windowID) == nullptr)
					return false;
				int mouseButton;
				switch (event->button.button) {
					case SDL_BUTTON_LEFT: mouseButton = 0; break;
					case SDL_BUTTON_RIGHT: mouseButton = 1; break;
					case SDL_BUTTON_MIDDLE: mouseButton = 2; break;
					case SDL_BUTTON_X1: mouseButton = 3; break;
					case SDL_BUTTON_X2: mouseButton = 4; break;
					default: mouseButton = -1; break;
				}
				if (mouseButton == -1) {
					break;
				}

				io.AddMouseSourceEvent(event->wheel.which == SDL_TOUCH_MOUSEID ? ImGuiMouseSource_TouchScreen : ImGuiMouseSource_Mouse);
				io.AddMouseButtonEvent(mouseButton, (event->type == SDL_MOUSEBUTTONDOWN));
				_mouseButtonsDown = (event->type == SDL_MOUSEBUTTONDOWN) ? (_mouseButtonsDown | (1 << mouseButton)) : (_mouseButtonsDown & ~(1 << mouseButton));
				return true;
			}
			case SDL_TEXTINPUT: {
				if (getViewportForWindowID(event->text.windowID) == nullptr)
					return false;
				io.AddInputCharactersUTF8(event->text.text);
				return true;
			}
			case SDL_KEYDOWN:
			case SDL_KEYUP: {
				if (getViewportForWindowID(event->key.windowID) == nullptr)
					return false;
#if defined(WITH_SDL3)
				// SDL3 removed the nested SDL_Keysym; keycode/scancode/modifiers are fields on the event
				updateKeyModifiers(static_cast<SDL_Keymod>(event->key.mod));
				const ImGuiKey key = sdlKeycodeToImGuiKey(event->key.key);
				io.AddKeyEvent(key, (event->type == SDL_KEYDOWN));
				io.SetKeyEventNativeData(key, event->key.key, event->key.scancode, event->key.scancode);
#else
				updateKeyModifiers(static_cast<SDL_Keymod>(event->key.keysym.mod));
				const ImGuiKey key = sdlKeycodeToImGuiKey(event->key.keysym.sym);
				io.AddKeyEvent(key, (event->type == SDL_KEYDOWN));
				// To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions.
				io.SetKeyEventNativeData(key, event->key.keysym.sym, event->key.keysym.scancode, event->key.keysym.scancode);
#endif
				return true;
			}
#if defined(WITH_SDL3)
			case SDL_EVENT_DISPLAY_ORIENTATION:
			case SDL_EVENT_DISPLAY_ADDED:
			case SDL_EVENT_DISPLAY_REMOVED:
			case SDL_EVENT_DISPLAY_MOVED:
			case SDL_EVENT_DISPLAY_CONTENT_SCALE_CHANGED:
			{
				_wantUpdateMonitors = true;
				return true;
			}
			// SDL3 flattened SDL_WINDOWEVENT into individual event types (there is no event->window.event sub-field)
			case SDL_EVENT_WINDOW_MOUSE_ENTER:
				_mouseWindowID = event->window.windowID;
				_mouseLastLeaveFrame = 0;
				return true;
			case SDL_EVENT_WINDOW_MOUSE_LEAVE:
				_mouseLastLeaveFrame = ImGui::GetFrameCount() + 1;
				return true;
			case SDL_EVENT_WINDOW_FOCUS_GAINED:
				io.AddFocusEvent(true);
				return true;
			case SDL_EVENT_WINDOW_FOCUS_LOST:
				io.AddFocusEvent(false);
				return true;
#	if defined(IMGUI_HAS_VIEWPORT)
			case SDL_EVENT_WINDOW_CLOSE_REQUESTED:
				if (ImGuiViewport* viewport = getViewportForWindowID(event->window.windowID)) {
					viewport->PlatformRequestClose = true;
				}
				return true;
			case SDL_EVENT_WINDOW_MOVED:
				if (ImGuiViewport* viewport = getViewportForWindowID(event->window.windowID)) {
					viewport->PlatformRequestMove = true;
				}
				return true;
			case SDL_EVENT_WINDOW_RESIZED:
				if (ImGuiViewport* viewport = getViewportForWindowID(event->window.windowID)) {
					viewport->PlatformRequestResize = true;
				}
				return true;
#	endif
#else
#if SDL_HAS_DISPLAY_EVENT
			case SDL_DISPLAYEVENT:
			{
				// 2.0.26 has SDL_DISPLAYEVENT_CONNECTED/SDL_DISPLAYEVENT_DISCONNECTED/SDL_DISPLAYEVENT_ORIENTATION,
				// so change of DPI/Scaling are not reflected in this event. (SDL3 has it)
				_wantUpdateMonitors = true;
				return true;
			}
#endif
			case SDL_WINDOWEVENT: {
				// - When capturing mouse, SDL will send a bunch of conflicting LEAVE/ENTER event on every mouse move, but the final ENTER tends to be right.
				// - However we won't get a correct LEAVE event for a captured window.
				// - In some cases, when detaching a window from main viewport SDL may send SDL_WINDOWEVENT_ENTER one frame too late,
				//   causing SDL_WINDOWEVENT_LEAVE on previous frame to interrupt drag operation by clear mouse position. This is why
				//   we delay process the SDL_WINDOWEVENT_LEAVE events by one frame. See issue #5012 for details.
#if defined(IMGUI_HAS_VIEWPORT)
				ImGuiViewport* viewport = getViewportForWindowID(event->window.windowID);
				if (viewport == nullptr) {
					return false;
				}
#endif
				const Uint8 windowEvent = event->window.event;
				if (windowEvent == SDL_WINDOWEVENT_ENTER) {
					_mouseWindowID = event->window.windowID;
					_mouseLastLeaveFrame = 0;
				} else if (windowEvent == SDL_WINDOWEVENT_LEAVE) {
					_mouseLastLeaveFrame = ImGui::GetFrameCount() + 1;
				} else if (windowEvent == SDL_WINDOWEVENT_FOCUS_GAINED) {
					io.AddFocusEvent(true);
				} else if (windowEvent == SDL_WINDOWEVENT_FOCUS_LOST) {
					io.AddFocusEvent(false);
				}
#if defined(IMGUI_HAS_VIEWPORT)
				else if (windowEvent == SDL_WINDOWEVENT_CLOSE) {
					viewport->PlatformRequestClose = true;
				} else if (windowEvent == SDL_WINDOWEVENT_MOVED) {
					viewport->PlatformRequestMove = true;
				} else if (windowEvent == SDL_WINDOWEVENT_RESIZED) {
					viewport->PlatformRequestResize = true;
				}
#endif
				return true;
			}
#endif
			case SDL_CONTROLLERDEVICEADDED:
			case SDL_CONTROLLERDEVICEREMOVED: {
				_wantUpdateGamepadsList = true;
				return true;
			}
		}
		return false;
	}

	const char* ImGuiSdlInput::clipboardText(ImGuiContext* ctx)
	{
		if (_clipboardTextData != nullptr) {
			SDL_free(_clipboardTextData);
		}
		_clipboardTextData = SDL_GetClipboardText();
		return _clipboardTextData;
	}

	void ImGuiSdlInput::updateMouseData()
	{
		ImGuiIO& io = ImGui::GetIO();

		// We forward mouse input when hovered or captured (via SDL_MOUSEMOTION) or when focused (below)
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
		// - SDL_CaptureMouse() let the OS know, e.g., that our drags can extend outside of parent boundaries (we want updated position) and shouldn't trigger other operations outside.
		// - Debuggers under Linux tends to leave captured mouse on break, which may be very inconvenient, so to mitigate the issue we wait until mouse has moved to begin capture.
		if (_mouseCanUseGlobalState) {
			bool wantCapture = false;
			for (int buttonN = 0; buttonN < ImGuiMouseButton_COUNT && !wantCapture; buttonN++) {
				if (ImGui::IsMouseDragging(buttonN, 1.0f))
					wantCapture = true;
			}
#if defined(WITH_SDL3)
			SDL_CaptureMouse(wantCapture);
#else
			SDL_CaptureMouse(wantCapture ? SDL_TRUE : SDL_FALSE);
#endif
		}

		SDL_Window* focusedWindow = SDL_GetKeyboardFocus();
		const bool isAppFocused = (_window == focusedWindow);
#else
		SDL_Window* focusedWindow = _window;
		const bool isAppFocused = (SDL_GetWindowFlags(_window) & SDL_WINDOW_INPUT_FOCUS) != 0; // SDL 2.0.3 and non-windowed systems: single-viewport only
#endif

		if (isAppFocused) {
			// (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
			if (io.WantSetMousePos) {
#if defined(WITH_SDL3)
				// SDL3: the warp functions take float coordinates
#	if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
				if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
					SDL_WarpMouseGlobal(io.MousePos.x, io.MousePos.y);
				else
#	endif
					SDL_WarpMouseInWindow(_window, io.MousePos.x, io.MousePos.y);
#else
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
				if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
					SDL_WarpMouseGlobal((int)io.MousePos.x, (int)io.MousePos.y);
				else
#endif
					SDL_WarpMouseInWindow(_window, (int)io.MousePos.x, (int)io.MousePos.y);
#endif
			}

			// (Optional) Fallback to provide mouse position when focused (SDL_MOUSEMOTION already provides this when hovered or captured)
#if defined(WITH_SDL3)
			// SDL3: relative mouse mode is per-window; the global mouse state reports float coordinates
			const bool isRelativeMouseMode = SDL_GetWindowRelativeMouseMode(_window);
			if (_mouseCanUseGlobalState && _mouseButtonsDown == 0 && !isRelativeMouseMode) {
				float mouseXGlobal = 0.0f, mouseYGlobal = 0.0f;
				SDL_GetGlobalMouseState(&mouseXGlobal, &mouseYGlobal);
				int windowX = 0, windowY = 0;
				SDL_GetWindowPosition(_window, &windowX, &windowY);
#if defined(IMGUI_HAS_VIEWPORT)
				if (!(io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)) {
					SDL_GetWindowPosition(focusedWindow, &windowX, &windowY);
					mouseXGlobal -= static_cast<float>(windowX);
					mouseYGlobal -= static_cast<float>(windowY);
				}
#endif
				io.AddMousePosEvent(mouseXGlobal, mouseYGlobal);
			}
#else
			const bool isRelativeMouseMode = SDL_GetRelativeMouseMode() != 0;
			if (_mouseCanUseGlobalState && _mouseButtonsDown == 0 && !isRelativeMouseMode) {
				int windowX, windowY, mouseXGlobal, mouseYGlobal;
				SDL_GetGlobalMouseState(&mouseXGlobal, &mouseYGlobal);
				SDL_GetWindowPosition(_window, &windowX, &windowY);
#if defined(IMGUI_HAS_VIEWPORT)
				if (!(io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)) {
					SDL_GetWindowPosition(focusedWindow, &windowX, &windowY);
					mouseXGlobal -= windowX;
					mouseYGlobal -= windowY;
				}
#endif
				io.AddMousePosEvent(static_cast<float>(mouseXGlobal), static_cast<float>(mouseYGlobal));
			}
#endif
		}

#if defined(IMGUI_HAS_VIEWPORT)
		if (io.BackendFlags & ImGuiBackendFlags_HasMouseHoveredViewport) {
			ImGuiID mouseViewportId = 0;
			if (ImGuiViewport* mouseViewport = getViewportForWindowID(_mouseWindowID)) {
				mouseViewportId = mouseViewport->ID;
			}
			io.AddMouseViewportEvent(mouseViewportId);
		}
#endif
	}

	void ImGuiSdlInput::updateMouseCursor()
	{
		ImGuiIO& io = ImGui::GetIO();
		if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange) {
			return;
		}

		ImGuiMouseCursor imguiCursor = ImGui::GetMouseCursor();
		if (io.MouseDrawCursor || imguiCursor == ImGuiMouseCursor_None) {
			// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
#if defined(WITH_SDL3)
			SDL_HideCursor();
#else
			SDL_ShowCursor(SDL_FALSE);
#endif
		} else {
			// Show OS mouse cursor
			SDL_Cursor* expectedCursor = (_mouseCursors[imguiCursor] ? _mouseCursors[imguiCursor] : _mouseCursors[ImGuiMouseCursor_Arrow]);
			if (_mouseLastCursor != expectedCursor) {
				SDL_SetCursor(expectedCursor); // SDL function doesn't have an early out (see #6113)
				_mouseLastCursor = expectedCursor;
			}
#if defined(WITH_SDL3)
			SDL_ShowCursor();
#else
			SDL_ShowCursor(SDL_TRUE);
#endif
		}
	}

	// - On Windows the process needs to be marked DPI-aware!! SDL2 doesn't do it by default. You can call ::SetProcessDPIAware() or call ImGui_ImplWin32_EnableDpiAwareness() from Win32 backend.
	// - Apple platforms use FramebufferScale so we always return 1.0f.
	// - Some accessibility applications are declaring virtual monitors with a DPI of 0.0f, see #7902. We preserve this value for caller to handle.
	float ImGuiSdlInput::getContentScaleForWindow(SDL_Window* window)
	{
#if defined(WITH_SDL3)
		return getContentScaleForDisplay(static_cast<int>(SDL_GetDisplayForWindow(window)));
#else
		return getContentScaleForDisplay(SDL_GetWindowDisplayIndex(window));
#endif
	}

	float ImGuiSdlInput::getContentScaleForDisplay(int displayIndex)
	{
#if defined(WITH_SDL3)
		// SDL3: SDL_GetDisplayDPI was replaced by a single content-scale factor keyed by SDL_DisplayID
		const float contentScale = SDL_GetDisplayContentScale(static_cast<SDL_DisplayID>(displayIndex));
		return (contentScale > 0.0f ? contentScale : 1.0f);
#else
#if SDL_HAS_PER_MONITOR_DPI
#	if !defined(DEATH_TARGET_APPLE) && !defined(DEATH_TARGET_EMSCRIPTEN) && !defined(DEATH_TARGET_ANDROID)
		float dpi = 0.0f;
		if (SDL_GetDisplayDPI(displayIndex, &dpi, nullptr, nullptr) == 0) {
			return dpi / 96.0f;
		}
#	endif
#endif
		IM_UNUSED(displayIndex);
		return 1.0f;
#endif
	}

	void ImGuiSdlInput::closeGamepads()
	{
		if (_gamepadMode != GamepadMode::Manual) {
			for (SDL_GameController* gamepad : _gamepads) {
				SDL_GameControllerClose(gamepad);
			}
			_gamepads.resize(0);
		}
	}

	void ImGuiSdlInput::setGamepadMode(GamepadMode mode, SDL_GameController** manualGamepadsArray, unsigned int manualGamepadsCount)
	{
		closeGamepads();
		if (mode == GamepadMode::Manual) {
			IM_ASSERT(manualGamepadsArray != nullptr && manualGamepadsCount > 0);
			for (unsigned int n = 0; n < manualGamepadsCount; n++) {
				_gamepads.push_back(manualGamepadsArray[n]);
			}
		} else {
			IM_ASSERT(manualGamepadsArray == nullptr && manualGamepadsCount == 0);
			_wantUpdateGamepadsList = true;
		}
		_gamepadMode = mode;
	}

	void ImGuiSdlInput::updateGamepads()
	{
		ImGuiIO& io = ImGui::GetIO();

		// Update list of controller(s) to use
		if (_wantUpdateGamepadsList && _gamepadMode != GamepadMode::Manual) {
			closeGamepads();
#if defined(WITH_SDL3)
			// SDL3 enumerates already-gamepad-capable devices directly (as instance IDs), so no SDL_IsGamepad check
			int gamepadCount = 0;
			SDL_JoystickID* gamepadIds = SDL_GetGamepads(&gamepadCount);
			for (int n = 0; n < gamepadCount; n++) {
				if (SDL_GameController* gamepad = SDL_GameControllerOpen(gamepadIds[n])) {
					_gamepads.push_back(gamepad);
					if (_gamepadMode == GamepadMode::AutoFirst)
						break;
				}
			}
			SDL_free(gamepadIds);
#else
			const int joystickCount = SDL_NumJoysticks();
			for (int n = 0; n < joystickCount; n++) {
				if (SDL_IsGameController(n)) {
					if (SDL_GameController* gamepad = SDL_GameControllerOpen(n)) {
						_gamepads.push_back(gamepad);
						if (_gamepadMode == GamepadMode::AutoFirst)
							break;
					}
				}
			}
#endif
			_wantUpdateGamepadsList = false;
		}

		// FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
		if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
			return;
		io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
		if (_gamepads.Size == 0)
			return;
		io.BackendFlags |= ImGuiBackendFlags_HasGamepad;

		// No need to call `imGuiJoyMappedInput()` as the backend is using `SDL_GameController`

		// Update gamepad inputs
		// clang-format off
		const int thumbDeadZone = 8000; // SDL_gamecontroller.h suggests using this value.
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadStart, SDL_CONTROLLER_BUTTON_START);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadBack, SDL_CONTROLLER_BUTTON_BACK);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadFaceLeft, SDL_CONTROLLER_BUTTON_X);		// Xbox X, PS Square
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadFaceRight, SDL_CONTROLLER_BUTTON_B);		// Xbox B, PS Circle
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadFaceUp, SDL_CONTROLLER_BUTTON_Y);		// Xbox Y, PS Triangle
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadFaceDown, SDL_CONTROLLER_BUTTON_A);		// Xbox A, PS Cross
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadDpadLeft, SDL_CONTROLLER_BUTTON_DPAD_LEFT);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadDpadRight, SDL_CONTROLLER_BUTTON_DPAD_RIGHT);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadDpadUp, SDL_CONTROLLER_BUTTON_DPAD_UP);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadDpadDown, SDL_CONTROLLER_BUTTON_DPAD_DOWN);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadL1, SDL_CONTROLLER_BUTTON_LEFTSHOULDER);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadR1, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadL2, SDL_CONTROLLER_AXIS_TRIGGERLEFT, 0.0f, 32767);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadR2, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, 0.0f, 32767);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadL3, SDL_CONTROLLER_BUTTON_LEFTSTICK);
		updateGamepadButton(_gamepads, io, ImGuiKey_GamepadR3, SDL_CONTROLLER_BUTTON_RIGHTSTICK);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadLStickLeft, SDL_CONTROLLER_AXIS_LEFTX, -thumbDeadZone, -32768);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadLStickRight, SDL_CONTROLLER_AXIS_LEFTX, +thumbDeadZone, +32767);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadLStickUp, SDL_CONTROLLER_AXIS_LEFTY, -thumbDeadZone, -32768);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadLStickDown, SDL_CONTROLLER_AXIS_LEFTY, +thumbDeadZone, +32767);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadRStickLeft, SDL_CONTROLLER_AXIS_RIGHTX, -thumbDeadZone, -32768);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadRStickRight, SDL_CONTROLLER_AXIS_RIGHTX, +thumbDeadZone, +32767);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadRStickUp, SDL_CONTROLLER_AXIS_RIGHTY, -thumbDeadZone, -32768);
		updateGamepadAnalog(_gamepads, io, ImGuiKey_GamepadRStickDown, SDL_CONTROLLER_AXIS_RIGHTY, +thumbDeadZone, +32767);
		// clang-format on
	}

	void ImGuiSdlInput::getWindowSizeAndFramebufferScale(SDL_Window* window, SDL_Renderer* renderer, ImVec2* outSize, ImVec2* outFramebufferScale)
	{
		int w, h;
		int displayW, displayH;
		SDL_GetWindowSize(window, &w, &h);
		if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)
			w = h = 0;
#if defined(WITH_SDL3)
		// SDL3: unified pixel-size query (SDL_GL_GetDrawableSize / SDL_Vulkan_GetDrawableSize were removed)
		if (renderer != nullptr)
			SDL_GetRenderOutputSize(renderer, &displayW, &displayH);
		else
			SDL_GetWindowSizeInPixels(window, &displayW, &displayH);
#else
		if (renderer != nullptr)
			SDL_GetRendererOutputSize(renderer, &displayW, &displayH);
#if SDL_HAS_VULKAN
		else if (SDL_GetWindowFlags(window) & SDL_WINDOW_VULKAN)
			SDL_Vulkan_GetDrawableSize(window, &displayW, &displayH);
#endif
		else
			SDL_GL_GetDrawableSize(window, &displayW, &displayH);
#endif

		if (outSize != nullptr)
			*outSize = ImVec2(static_cast<float>(w), static_cast<float>(h));
		if (outFramebufferScale != nullptr)
			*outFramebufferScale = (w > 0 && h > 0) ? ImVec2(static_cast<float>(displayW) / w, static_cast<float>(displayH) / h) : ImVec2(1.0f, 1.0f);
	}

#if defined(IMGUI_HAS_DOCK)
	void ImGuiSdlInput::updateMonitors()
	{
		ImGuiPlatformIO& pio = ImGui::GetPlatformIO();
		pio.Monitors.resize(0);
		_wantUpdateMonitors = false;
#	if defined(WITH_SDL3)
		// SDL3 enumerates displays as opaque SDL_DisplayID values (SDL2 used a 0-based count/index)
		int display_count = 0;
		SDL_DisplayID* displays = SDL_GetDisplays(&display_count);
		for (int n = 0; n < display_count; n++) {
			const SDL_DisplayID displayId = displays[n];
			ImGuiPlatformMonitor monitor;
			SDL_Rect r;
			SDL_GetDisplayBounds(displayId, &r);
			monitor.MainPos = monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
			monitor.MainSize = monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
			if (SDL_GetDisplayUsableBounds(displayId, &r) && r.w > 0 && r.h > 0) {
				monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
				monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
			}
			float dpi_scale = getContentScaleForDisplay((int)displayId);
			if (dpi_scale <= 0.0f)
				continue; // Some accessibility applications are declaring virtual monitors with a DPI of 0, see #7902.
			monitor.DpiScale = dpi_scale;
			monitor.PlatformHandle = (void*)(intptr_t)displayId;
			pio.Monitors.push_back(monitor);
		}
		SDL_free(displays);
#	else
		int display_count = SDL_GetNumVideoDisplays();
		for (int n = 0; n < display_count; n++) {
			// Warning: the validity of monitor DPI information on Windows depends on the application DPI awareness settings, which generally needs to be set in the manifest or at runtime.
			ImGuiPlatformMonitor monitor;
			SDL_Rect r;
			SDL_GetDisplayBounds(n, &r);
			monitor.MainPos = monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
			monitor.MainSize = monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
#		if SDL_HAS_USABLE_DISPLAY_BOUNDS
			if (SDL_GetDisplayUsableBounds(n, &r) == 0 && r.w > 0 && r.h > 0) {
				monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
				monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
			}
#		endif
			float dpi_scale = getContentScaleForDisplay(n);
			if (dpi_scale <= 0.0f)
				continue; // Some accessibility applications are declaring virtual monitors with a DPI of 0, see #7902.
			monitor.DpiScale = dpi_scale;
			monitor.PlatformHandle = (void*)(intptr_t)n;
			pio.Monitors.push_back(monitor);
		}
#	endif
	}
#endif

#if defined(IMGUI_HAS_VIEWPORT)
	void* ImGuiSdlInput::getPlatformWindowHandle(ImGuiViewport* viewport)
	{
		ViewportData* vd = (viewport != nullptr ? (ViewportData*)viewport->PlatformUserData : nullptr);
		return (vd != nullptr ? vd->Window : nullptr);
	}

	void ImGuiSdlInput::onCreateWindow(ImGuiViewport* viewport)
	{
		ViewportData* vd = new ViewportData();
		viewport->PlatformUserData = vd;

		ImGuiViewport* mainViewport = ImGui::GetMainViewport();
		ViewportData* mainViewportData = (ViewportData*)mainViewport->PlatformUserData;

		// Share GL resources with main context
		bool useOpenGL = (mainViewportData->GLContext != nullptr);
		SDL_GLContext backupContext = nullptr;
		if (useOpenGL) {
			backupContext = SDL_GL_GetCurrentContext();
			SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
			SDL_GL_MakeCurrent(mainViewportData->Window, mainViewportData->GLContext);
		}

		Uint32 sdl_flags = 0;
#	if defined(WITH_RHI_VULKAN)
		// The renderer creates a VkSurfaceKHR from this window, which SDL only allows on a Vulkan window
		sdl_flags |= (useOpenGL ? SDL_WINDOW_OPENGL : SDL_WINDOW_VULKAN);
#	else
		sdl_flags |= (useOpenGL ? SDL_WINDOW_OPENGL : 0);
#	endif
#	if defined(WITH_SDL3)
		sdl_flags |= (Uint32)(SDL_GetWindowFlags(_window) & SDL_WINDOW_HIGH_PIXEL_DENSITY);
#	else
		sdl_flags |= SDL_GetWindowFlags(_window) & SDL_WINDOW_ALLOW_HIGHDPI;
#	endif
		sdl_flags |= SDL_WINDOW_HIDDEN;
		sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoDecoration) ? SDL_WINDOW_BORDERLESS : 0;
		sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoDecoration) ? 0 : SDL_WINDOW_RESIZABLE;
#	if !defined(DEATH_TARGET_WINDOWS)
#		if defined(WITH_SDL3)
		// SDL3 removed SDL_WINDOW_SKIP_TASKBAR; SDL_WINDOW_UTILITY keeps the window out of the taskbar
		sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoTaskBarIcon) ? SDL_WINDOW_UTILITY : 0;
#		else
		sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoTaskBarIcon) ? SDL_WINDOW_SKIP_TASKBAR : 0;
#		endif
#	endif
#	if SDL_HAS_ALWAYS_ON_TOP
		sdl_flags |= (viewport->Flags & ImGuiViewportFlags_TopMost) ? SDL_WINDOW_ALWAYS_ON_TOP : 0;
#	endif
#	if defined(WITH_SDL3)
		// SDL3 dropped the x/y parameters from SDL_CreateWindow; the position is applied separately afterwards
		vd->Window = SDL_CreateWindow("ImGui", (int)viewport->Size.x, (int)viewport->Size.y, sdl_flags);
		SDL_SetWindowPosition(vd->Window, (int)viewport->Pos.x, (int)viewport->Pos.y);
#	else
		vd->Window = SDL_CreateWindow("ImGui", (int)viewport->Pos.x, (int)viewport->Pos.y, (int)viewport->Size.x, (int)viewport->Size.y, sdl_flags);
#	endif
		vd->WindowOwned = true;
		if (useOpenGL) {
			vd->GLContext = SDL_GL_CreateContext(vd->Window);
			SDL_GL_SetSwapInterval(0);
		}
		if (useOpenGL && backupContext) {
			SDL_GL_MakeCurrent(vd->Window, backupContext);
		}

		viewport->PlatformHandle = (void*)(std::intptr_t)SDL_GetWindowID(vd->Window);
		viewport->PlatformHandleRaw = nullptr;
#	if defined(WITH_SDL3)
		// SDL3 removed SDL_syswm.h; native window handles come from the window property store
#		if defined(DEATH_TARGET_WINDOWS)
		HWND hwnd = (HWND)SDL_GetPointerProperty(SDL_GetWindowProperties(vd->Window), SDL_PROP_WINDOW_WIN32_HWND_POINTER, nullptr);
		viewport->PlatformHandleRaw = (void*)hwnd;
		if (windowIconSmall != NULL) ::SendMessage(hwnd, WM_SETICON, ICON_SMALL, (LPARAM)windowIconSmall);
		if (windowIcon != NULL) ::SendMessage(hwnd, WM_SETICON, ICON_BIG, (LPARAM)windowIcon);
#		elif defined(DEATH_TARGET_APPLE)
		viewport->PlatformHandleRaw = SDL_GetPointerProperty(SDL_GetWindowProperties(vd->Window), SDL_PROP_WINDOW_COCOA_WINDOW_POINTER, nullptr);
#		endif
#	else
		SDL_SysWMinfo info;
		SDL_VERSION(&info.version);
		if (SDL_GetWindowWMInfo(vd->Window, &info)) {
#	if defined(SDL_VIDEO_DRIVER_WINDOWS)
			viewport->PlatformHandleRaw = info.info.win.window;
#	elif defined(DEATH_TARGET_APPLE) && defined(SDL_VIDEO_DRIVER_COCOA)
			viewport->PlatformHandleRaw = (void*)info.info.cocoa.window;
#	endif

#	if defined(DEATH_TARGET_WINDOWS)
			if (windowIconSmall != NULL) ::SendMessage(info.info.win.window, WM_SETICON, ICON_SMALL, (LPARAM)windowIconSmall);
			if (windowIcon != NULL) ::SendMessage(info.info.win.window, WM_SETICON, ICON_BIG, (LPARAM)windowIcon);
#	endif
		}
#	endif
	}

	void ImGuiSdlInput::onDestroyWindow(ImGuiViewport* viewport)
	{
		if (ViewportData* vd = (ViewportData*)viewport->PlatformUserData) {
			if (vd->GLContext && vd->WindowOwned) {
				SDL_GL_DeleteContext(vd->GLContext);
			}
			if (vd->Window && vd->WindowOwned) {
				SDL_DestroyWindow(vd->Window);
			}
			vd->GLContext = nullptr;
			vd->Window = nullptr;
			IM_DELETE(vd);
		}
		viewport->PlatformUserData = nullptr;
		viewport->PlatformHandle = nullptr;
	}

	void ImGuiSdlInput::onShowWindow(ImGuiViewport* viewport)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;

#	if defined(DEATH_TARGET_WINDOWS) && !(defined(WINAPI_FAMILY) && ((defined(WINAPI_FAMILY_APP) && WINAPI_FAMILY == WINAPI_FAMILY_APP) || (defined(WINAPI_FAMILY_GAMES) && WINAPI_FAMILY == WINAPI_FAMILY_GAMES)))
		HWND hwnd = (HWND)viewport->PlatformHandleRaw;

		// SDL hack: Hide icon from task bar
		// Note: SDL 2.0.6+ has a SDL_WINDOW_SKIP_TASKBAR flag which is supported under Windows but the way it create the window breaks our seamless transition.
		if (viewport->Flags & ImGuiViewportFlags_NoTaskBarIcon) {
			LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
			ex_style &= ~WS_EX_APPWINDOW;
			ex_style |= WS_EX_TOOLWINDOW;
			::SetWindowLong(hwnd, GWL_EXSTYLE, ex_style);
		}
#	endif

#	if SDL_HAS_SHOW_WINDOW_ACTIVATION_HINT
		SDL_SetHint(SDL_HINT_WINDOW_NO_ACTIVATION_WHEN_SHOWN, (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing) ? "1" : "0");
#	elif defined(DEATH_TARGET_WINDOWS)
		// SDL hack: SDL always activate/focus windows :/
		if (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing) {
			::ShowWindow(hwnd, SW_SHOWNA);
			return;
		}
#	endif

		SDL_ShowWindow(vd->Window);
	}

	ImVec2 ImGuiSdlInput::onGetWindowPos(ImGuiViewport* viewport)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		int x = 0, y = 0;
		SDL_GetWindowPosition(vd->Window, &x, &y);
		return ImVec2((float)x, (float)y);
	}

	void ImGuiSdlInput::onSetWindowPos(ImGuiViewport* viewport, ImVec2 pos)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		SDL_SetWindowPosition(vd->Window, (int)pos.x, (int)pos.y);
	}

	ImVec2 ImGuiSdlInput::onGetWindowSize(ImGuiViewport* viewport)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		int w = 0, h = 0;
		SDL_GetWindowSize(vd->Window, &w, &h);
		return ImVec2((float)w, (float)h);
	}

	ImVec2 ImGuiSdlInput::onGetWindowFramebufferScale(ImGuiViewport* viewport)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		ImVec2 framebufferScale;
		getWindowSizeAndFramebufferScale(vd->Window, nullptr, nullptr, &framebufferScale);
		return framebufferScale;
	}

	void ImGuiSdlInput::onSetWindowSize(ImGuiViewport* viewport, ImVec2 size)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		SDL_SetWindowSize(vd->Window, (int)size.x, (int)size.y);
	}

	void ImGuiSdlInput::onSetWindowTitle(ImGuiViewport* viewport, const char* title)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		SDL_SetWindowTitle(vd->Window, title);
	}

	void ImGuiSdlInput::onSetWindowFocus(ImGuiViewport* viewport)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		SDL_RaiseWindow(vd->Window);
	}

	bool ImGuiSdlInput::onGetWindowFocus(ImGuiViewport* viewport)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		return (SDL_GetWindowFlags(vd->Window) & SDL_WINDOW_INPUT_FOCUS) != 0;
	}

	bool ImGuiSdlInput::onGetWindowMinimized(ImGuiViewport* viewport)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		return (SDL_GetWindowFlags(vd->Window) & SDL_WINDOW_MINIMIZED) != 0;
	}

	void ImGuiSdlInput::onSetWindowAlpha(ImGuiViewport* viewport, float alpha)
	{
#	if SDL_HAS_WINDOW_ALPHA
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		SDL_SetWindowOpacity(vd->Window, alpha);
#	endif
	}

	void ImGuiSdlInput::onRenderWindow(ImGuiViewport* viewport, void*)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		if (vd->GLContext) {
			SDL_GL_MakeCurrent(vd->Window, vd->GLContext);
		}
	}

	void ImGuiSdlInput::onSwapBuffers(ImGuiViewport* viewport, void*)
	{
		ViewportData* vd = (ViewportData*)viewport->PlatformUserData;
		if (vd->GLContext) {
			SDL_GL_MakeCurrent(vd->Window, vd->GLContext);
			SDL_GL_SwapWindow(vd->Window);
		}
	}
#endif
}

#endif