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326
irr/src/CIrrDeviceSDL.h
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326
irr/src/CIrrDeviceSDL.h
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// Copyright (C) 2002-2012 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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// This device code is based on the original SDL device implementation
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// contributed by Shane Parker (sirshane).
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#pragma once
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#ifdef _IRR_COMPILE_WITH_SDL_DEVICE_
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#include "IrrlichtDevice.h"
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#include "CIrrDeviceStub.h"
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#include "ICursorControl.h"
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#ifdef _IRR_EMSCRIPTEN_PLATFORM_
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#include <emscripten/html5.h>
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#endif
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#include <SDL.h>
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// DirectFB is removed in SDL3, thou distribution as Alpine currently ships SDL2
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// with enabled DirectFB, but requiring another fix at a top of SDL2.
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// We don't need DirectFB in Irrlicht/Minetest, so simply disable it here to prevent issues.
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#undef SDL_VIDEO_DRIVER_DIRECTFB
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#include <SDL_syswm.h>
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#include <memory>
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namespace irr
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{
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class CIrrDeviceSDL : public CIrrDeviceStub
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{
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public:
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//! constructor
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CIrrDeviceSDL(const SIrrlichtCreationParameters ¶m);
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//! destructor
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virtual ~CIrrDeviceSDL();
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//! runs the device. Returns false if device wants to be deleted
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bool run() override;
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//! pause execution temporarily
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void yield() override;
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//! pause execution for a specified time
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void sleep(u32 timeMs, bool pauseTimer) override;
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//! sets the caption of the window
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void setWindowCaption(const wchar_t *text) override;
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//! Sets the window icon.
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bool setWindowIcon(const video::IImage *img) override;
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//! returns if window is active. if not, nothing need to be drawn
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bool isWindowActive() const override;
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//! returns if window has focus.
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bool isWindowFocused() const override;
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//! returns if window is minimized.
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bool isWindowMinimized() const override;
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//! returns color format of the window.
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video::ECOLOR_FORMAT getColorFormat() const override;
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//! notifies the device that it should close itself
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void closeDevice() override;
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//! Sets if the window should be resizable in windowed mode.
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void setResizable(bool resize = false) override;
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//! Minimizes the window.
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void minimizeWindow() override;
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//! Maximizes the window.
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void maximizeWindow() override;
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//! Restores the window size.
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void restoreWindow() override;
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//! Checks if the window is maximized.
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bool isWindowMaximized() const override;
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//! Checks if the Irrlicht window is running in fullscreen mode
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/** \return True if window is fullscreen. */
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bool isFullscreen() const override;
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//! Get the position of this window on screen
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core::position2di getWindowPosition() override;
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//! Activate any joysticks, and generate events for them.
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bool activateJoysticks(core::array<SJoystickInfo> &joystickInfo) override;
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//! Get the device type
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E_DEVICE_TYPE getType() const override
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{
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return EIDT_SDL;
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}
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//! Get the display density in dots per inch.
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float getDisplayDensity() const override;
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void SwapWindow();
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//! Implementation of the linux cursor control
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class CCursorControl : public gui::ICursorControl
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{
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public:
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CCursorControl(CIrrDeviceSDL *dev) :
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Device(dev), IsVisible(true)
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{
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initCursors();
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}
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//! Changes the visible state of the mouse cursor.
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void setVisible(bool visible) override
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{
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IsVisible = visible;
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if (visible)
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SDL_ShowCursor(SDL_ENABLE);
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else {
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SDL_ShowCursor(SDL_DISABLE);
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}
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}
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//! Returns if the cursor is currently visible.
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bool isVisible() const override
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{
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return IsVisible;
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}
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//! Sets the new position of the cursor.
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void setPosition(const core::position2d<f32> &pos) override
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{
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setPosition(pos.X, pos.Y);
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}
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//! Sets the new position of the cursor.
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void setPosition(f32 x, f32 y) override
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{
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setPosition((s32)(x * Device->Width), (s32)(y * Device->Height));
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}
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//! Sets the new position of the cursor.
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void setPosition(const core::position2d<s32> &pos) override
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{
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setPosition(pos.X, pos.Y);
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}
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//! Sets the new position of the cursor.
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void setPosition(s32 x, s32 y) override
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{
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SDL_WarpMouseInWindow(Device->Window, x, y);
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if (SDL_GetRelativeMouseMode()) {
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// There won't be an event for this warp (details on libsdl-org/SDL/issues/6034)
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Device->MouseX = x;
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Device->MouseY = y;
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}
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}
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//! Returns the current position of the mouse cursor.
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const core::position2d<s32> &getPosition(bool updateCursor) override
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{
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if (updateCursor)
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updateCursorPos();
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return CursorPos;
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}
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//! Returns the current position of the mouse cursor.
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core::position2d<f32> getRelativePosition(bool updateCursor) override
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{
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if (updateCursor)
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updateCursorPos();
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return core::position2d<f32>(CursorPos.X / (f32)Device->Width,
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CursorPos.Y / (f32)Device->Height);
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}
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void setReferenceRect(core::rect<s32> *rect = 0) override
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{
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}
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virtual void setRelativeMode(bool relative) _IRR_OVERRIDE_
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{
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// Only change it when necessary, as it flushes mouse motion when enabled
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if (relative != SDL_GetRelativeMouseMode()) {
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if (relative)
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SDL_SetRelativeMouseMode(SDL_TRUE);
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else
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SDL_SetRelativeMouseMode(SDL_FALSE);
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}
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}
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void setActiveIcon(gui::ECURSOR_ICON iconId) override
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{
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ActiveIcon = iconId;
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if (iconId > Cursors.size() || !Cursors[iconId]) {
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iconId = gui::ECI_NORMAL;
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if (iconId > Cursors.size() || !Cursors[iconId])
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return;
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}
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SDL_SetCursor(Cursors[iconId].get());
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}
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gui::ECURSOR_ICON getActiveIcon() const override
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{
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return ActiveIcon;
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}
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private:
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void updateCursorPos()
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{
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#ifdef _IRR_EMSCRIPTEN_PLATFORM_
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EmscriptenPointerlockChangeEvent pointerlockStatus; // let's hope that test is not expensive ...
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if (emscripten_get_pointerlock_status(&pointerlockStatus) == EMSCRIPTEN_RESULT_SUCCESS) {
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if (pointerlockStatus.isActive) {
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CursorPos.X += Device->MouseXRel;
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CursorPos.Y += Device->MouseYRel;
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Device->MouseXRel = 0;
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Device->MouseYRel = 0;
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} else {
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CursorPos.X = Device->MouseX;
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CursorPos.Y = Device->MouseY;
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}
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}
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#else
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CursorPos.X = Device->MouseX;
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CursorPos.Y = Device->MouseY;
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if (CursorPos.X < 0)
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CursorPos.X = 0;
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if (CursorPos.X > (s32)Device->Width)
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CursorPos.X = Device->Width;
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if (CursorPos.Y < 0)
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CursorPos.Y = 0;
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if (CursorPos.Y > (s32)Device->Height)
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CursorPos.Y = Device->Height;
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#endif
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}
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void initCursors();
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CIrrDeviceSDL *Device;
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core::position2d<s32> CursorPos;
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bool IsVisible;
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struct CursorDeleter
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{
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void operator()(SDL_Cursor *ptr)
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{
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if (ptr)
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SDL_FreeCursor(ptr);
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}
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};
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std::vector<std::unique_ptr<SDL_Cursor, CursorDeleter>> Cursors;
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gui::ECURSOR_ICON ActiveIcon = gui::ECURSOR_ICON::ECI_NORMAL;
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};
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private:
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#ifdef _IRR_EMSCRIPTEN_PLATFORM_
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static EM_BOOL MouseUpDownCallback(int eventType, const EmscriptenMouseEvent *event, void *userData);
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static EM_BOOL MouseEnterCallback(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData);
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static EM_BOOL MouseLeaveCallback(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData);
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#endif
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// Check if a key is a known special character with no side effects on text boxes.
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static bool keyIsKnownSpecial(EKEY_CODE key);
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// Return the Char that should be sent to Irrlicht for the given key (either the one passed in or 0).
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static int findCharToPassToIrrlicht(int assumedChar, EKEY_CODE key);
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// Check if a text box is in focus. Enable or disable SDL_TEXTINPUT events only if in focus.
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void resetReceiveTextInputEvents();
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//! create the driver
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void createDriver();
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bool createWindow();
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void createKeyMap();
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void logAttributes();
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SDL_GLContext Context;
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SDL_Window *Window;
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int SDL_Flags;
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#if defined(_IRR_COMPILE_WITH_JOYSTICK_EVENTS_)
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core::array<SDL_Joystick *> Joysticks;
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#endif
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s32 MouseX, MouseY;
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s32 MouseXRel, MouseYRel;
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u32 MouseButtonStates;
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u32 Width, Height;
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bool Resizable;
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core::rect<s32> lastElemPos;
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struct SKeyMap
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{
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SKeyMap() {}
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SKeyMap(s32 x11, s32 win32) :
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SDLKey(x11), Win32Key(win32)
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{
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}
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s32 SDLKey;
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s32 Win32Key;
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bool operator<(const SKeyMap &o) const
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{
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return SDLKey < o.SDLKey;
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}
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};
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core::array<SKeyMap> KeyMap;
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SDL_SysWMinfo Info;
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s32 CurrentTouchCount;
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};
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} // end namespace irr
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#endif // _IRR_COMPILE_WITH_SDL_DEVICE_
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