// dear imgui: Platform Backend for SDL2

// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)

// (Info: SDL2 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)

// Implemented features:

//  [X] Platform: Clipboard support.

//  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen.

//  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values are obsolete since 1.87 and not supported since 1.91.5]

//  [X] Platform: Gamepad support.

//  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.

//  [X] Platform: Basic IME support. App needs to call 'SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");' before SDL_CreateWindow()!.

//  [X] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.

// Missing features or Issues:

//  [ ] Platform: Multi-viewport: Minimized windows seems to break mouse wheel events (at least under Windows).

//  [ ] Platform: Multi-viewport: Missing ImGuiBackendFlags_HasParentViewport support. The viewport->ParentViewportID field is ignored, and therefore io.ConfigViewportsNoDefaultParent has no effect either.

// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.

// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.

// Learn about Dear ImGui:

// - FAQ                  https://dearimgui.com/faq

// - Getting Started      https://dearimgui.com/getting-started

// - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).

// - Introduction, links and more at the top of imgui.cpp

#pragma once

#include "imgui.h"      // IMGUI_IMPL_API

#ifndef IMGUI_DISABLE

struct SDL_Window;

struct SDL_Renderer;

struct _SDL_GameController;

typedef union SDL_Event SDL_Event;

// Follow "Getting Started" link and check examples/ folder to learn about using backends!

IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context);

IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForVulkan(SDL_Window* window);

IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForD3D(SDL_Window* window);

IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForMetal(SDL_Window* window);

IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer);

IMGUI_IMPL_API bool     ImGui_ImplSDL2_InitForOther(SDL_Window* window);

IMGUI_IMPL_API void     ImGui_ImplSDL2_Shutdown();

IMGUI_IMPL_API void     ImGui_ImplSDL2_NewFrame();

IMGUI_IMPL_API bool     ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event);

// DPI-related helpers (optional)

IMGUI_IMPL_API float    ImGui_ImplSDL2_GetContentScaleForWindow(SDL_Window* window);

IMGUI_IMPL_API float    ImGui_ImplSDL2_GetContentScaleForDisplay(int display_index);

// Gamepad selection automatically starts in AutoFirst mode, picking first available SDL_Gamepad. You may override this.

// When using manual mode, caller is responsible for opening/closing gamepad.

enum ImGui_ImplSDL2_GamepadMode { ImGui_ImplSDL2_GamepadMode_AutoFirst, ImGui_ImplSDL2_GamepadMode_AutoAll, ImGui_ImplSDL2_GamepadMode_Manual };

IMGUI_IMPL_API void     ImGui_ImplSDL2_SetGamepadMode(ImGui_ImplSDL2_GamepadMode mode, struct _SDL_GameController** manual_gamepads_array = nullptr, int manual_gamepads_count = -1);

// (Advanced, for X11 users) Override Mouse Capture mode. Mouse capture allows receiving updated mouse position after clicking inside our window and dragging outside it.

// Having this 'Enabled' is in theory always better. But, on X11 if you crash/break to debugger while capture is active you may temporarily lose access to your mouse.

// The best solution is to setup your debugger to automatically release capture, e.g. 'setxkbmap -option grab:break_actions && xdotool key XF86Ungrab' or via a GDB script. See #3650.

// But you may independently decide on X11, when a debugger is attached, to set this value to ImGui_ImplSDL2_MouseCaptureMode_Disabled.

enum ImGui_ImplSDL2_MouseCaptureMode { ImGui_ImplSDL2_MouseCaptureMode_Enabled, ImGui_ImplSDL2_MouseCaptureMode_EnabledAfterDrag, ImGui_ImplSDL2_MouseCaptureMode_Disabled };

IMGUI_IMPL_API void     ImGui_ImplSDL2_SetMouseCaptureMode(ImGui_ImplSDL2_MouseCaptureMode mode);

#endif // #ifndef IMGUI_DISABLE