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bgfx/examples/common/entry/entry_x11.cpp
Branimir Karadžić ad768598b1 x11: Fixed joystick read.
2015-06-14 17:29:17 -07:00

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/*
* Copyright 2011-2015 Branimir Karadzic. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include "entry_p.h"
#if ENTRY_CONFIG_USE_NATIVE && (BX_PLATFORM_FREEBSD || BX_PLATFORM_LINUX || BX_PLATFORM_RPI)
#define XK_MISCELLANY
#define XK_LATIN1
#include <X11/keysymdef.h>
#include <X11/Xlib.h> // will include X11 which #defines None... Don't mess with order of includes.
#include <bgfxplatform.h>
#undef None
#include <bx/thread.h>
#include <bx/os.h>
#include <bx/handlealloc.h>
#include <string.h> // memset
#include <string>
#include <fcntl.h>
namespace entry
{
#define JS_EVENT_BUTTON 0x01 /* button pressed/released */
#define JS_EVENT_AXIS 0x02 /* joystick moved */
#define JS_EVENT_INIT 0x80 /* initial state of device */
struct JoystickEvent
{
uint32_t time; /* event timestamp in milliseconds */
int16_t value; /* value */
uint8_t type; /* event type */
uint8_t number; /* axis/button number */
};
static Key::Enum s_translateButton[] =
{
Key::GamepadA,
Key::GamepadB,
Key::GamepadX,
Key::GamepadY,
Key::GamepadShoulderL,
Key::GamepadShoulderR,
Key::GamepadBack,
Key::GamepadStart,
Key::GamepadGuide,
Key::GamepadThumbL,
Key::GamepadThumbR,
};
static GamepadAxis::Enum s_translateAxis[] =
{
GamepadAxis::LeftX,
GamepadAxis::LeftY,
GamepadAxis::LeftZ,
GamepadAxis::RightX,
GamepadAxis::RightY,
GamepadAxis::RightZ,
};
struct Joystick
{
Joystick()
: m_fd(-1)
{
}
void init()
{
m_fd = open("/dev/input/js0", O_RDONLY | O_NONBLOCK);
memset(m_value, 0, sizeof(m_value) );
// Deadzone values from xinput.h
m_deadzone[GamepadAxis::LeftX ] =
m_deadzone[GamepadAxis::LeftY ] = 7849;
m_deadzone[GamepadAxis::RightX] =
m_deadzone[GamepadAxis::RightY] = 8689;
m_deadzone[GamepadAxis::LeftZ ] =
m_deadzone[GamepadAxis::RightZ] = 30;
}
void shutdown()
{
if (-1 != m_fd)
{
close(m_fd);
}
}
bool filter(GamepadAxis::Enum _axis, int32_t* _value)
{
const int32_t old = m_value[_axis];
const int32_t deadzone = m_deadzone[_axis];
int32_t value = *_value;
value = value > deadzone || value < -deadzone ? value : 0;
m_value[_axis] = value;
*_value = value;
return old != value;
}
bool update(EventQueue& _eventQueue)
{
if (-1 == m_fd)
{
return false;
}
JoystickEvent event;
int32_t bytes = read(m_fd, &event, sizeof(JoystickEvent) );
if (bytes != sizeof(JoystickEvent) )
{
return false;
}
WindowHandle defaultWindow = { 0 };
GamepadHandle handle = { 0 };
if (event.type & JS_EVENT_BUTTON)
{
if (event.number < BX_COUNTOF(s_translateButton) )
{
_eventQueue.postKeyEvent(defaultWindow, s_translateButton[event.number], 0, 0 != event.value);
}
}
else if (event.type & JS_EVENT_AXIS)
{
if (event.number < BX_COUNTOF(s_translateAxis) )
{
GamepadAxis::Enum axis = s_translateAxis[event.number];
int32_t value = event.value;
if (filter(axis, &value) )
{
_eventQueue.postAxisEvent(defaultWindow, handle, axis, value);
}
}
}
return true;
}
int m_fd;
int32_t m_value[GamepadAxis::Count];
int32_t m_deadzone[GamepadAxis::Count];
};
static Joystick s_joystick;
static uint8_t s_translateKey[512];
static void initTranslateKey(uint16_t _xk, Key::Enum _key)
{
_xk += 256;
BX_CHECK(_xk < BX_COUNTOF(s_translateKey), "Out of bounds %d.", _xk);
s_translateKey[_xk&0x1ff] = (uint8_t)_key;
}
Key::Enum fromXk(uint16_t _xk)
{
_xk += 256;
return 512 > _xk ? (Key::Enum)s_translateKey[_xk] : Key::None;
}
struct MainThreadEntry
{
int m_argc;
char** m_argv;
static int32_t threadFunc(void* _userData);
};
struct Msg
{
Msg()
: m_x(0)
, m_y(0)
, m_width(0)
, m_height(0)
, m_flags(0)
{
}
int32_t m_x;
int32_t m_y;
uint32_t m_width;
uint32_t m_height;
uint32_t m_flags;
std::string m_title;
};
struct Context
{
Context()
: m_modifiers(Modifier::None)
, m_exit(false)
{
memset(s_translateKey, 0, sizeof(s_translateKey) );
initTranslateKey(XK_Escape, Key::Esc);
initTranslateKey(XK_Return, Key::Return);
initTranslateKey(XK_Tab, Key::Tab);
initTranslateKey(XK_BackSpace, Key::Backspace);
initTranslateKey(XK_space, Key::Space);
initTranslateKey(XK_Up, Key::Up);
initTranslateKey(XK_Down, Key::Down);
initTranslateKey(XK_Left, Key::Left);
initTranslateKey(XK_Right, Key::Right);
initTranslateKey(XK_Insert, Key::Insert);
initTranslateKey(XK_Delete, Key::Delete);
initTranslateKey(XK_Home, Key::Home);
initTranslateKey(XK_KP_End, Key::End);
initTranslateKey(XK_Page_Up, Key::PageUp);
initTranslateKey(XK_Page_Down, Key::PageDown);
initTranslateKey(XK_Print, Key::Print);
initTranslateKey(XK_equal, Key::Plus);
initTranslateKey(XK_minus, Key::Minus);
initTranslateKey(XK_bracketleft, Key::LeftBracket);
initTranslateKey(XK_bracketright, Key::RightBracket);
initTranslateKey(XK_semicolon, Key::Semicolon);
initTranslateKey(XK_apostrophe, Key::Quote);
initTranslateKey(XK_comma, Key::Comma);
initTranslateKey(XK_period, Key::Period);
initTranslateKey(XK_slash, Key::Slash);
initTranslateKey(XK_backslash, Key::Backslash);
initTranslateKey(XK_grave, Key::Tilde);
initTranslateKey(XK_F1, Key::F1);
initTranslateKey(XK_F2, Key::F2);
initTranslateKey(XK_F3, Key::F3);
initTranslateKey(XK_F4, Key::F4);
initTranslateKey(XK_F5, Key::F5);
initTranslateKey(XK_F6, Key::F6);
initTranslateKey(XK_F7, Key::F7);
initTranslateKey(XK_F8, Key::F8);
initTranslateKey(XK_F9, Key::F9);
initTranslateKey(XK_F10, Key::F10);
initTranslateKey(XK_F11, Key::F11);
initTranslateKey(XK_F12, Key::F12);
initTranslateKey(XK_KP_Insert, Key::NumPad0);
initTranslateKey(XK_KP_End, Key::NumPad1);
initTranslateKey(XK_KP_Down, Key::NumPad2);
initTranslateKey(XK_KP_Page_Down, Key::NumPad3);
initTranslateKey(XK_KP_Left, Key::NumPad4);
initTranslateKey(XK_KP_Begin, Key::NumPad5);
initTranslateKey(XK_KP_Right, Key::NumPad6);
initTranslateKey(XK_KP_Home, Key::NumPad7);
initTranslateKey(XK_KP_Up, Key::NumPad8);
initTranslateKey(XK_KP_Page_Up, Key::NumPad9);
initTranslateKey('0', Key::Key0);
initTranslateKey('1', Key::Key1);
initTranslateKey('2', Key::Key2);
initTranslateKey('3', Key::Key3);
initTranslateKey('4', Key::Key4);
initTranslateKey('5', Key::Key5);
initTranslateKey('6', Key::Key6);
initTranslateKey('7', Key::Key7);
initTranslateKey('8', Key::Key8);
initTranslateKey('9', Key::Key9);
initTranslateKey('a', Key::KeyA);
initTranslateKey('b', Key::KeyB);
initTranslateKey('c', Key::KeyC);
initTranslateKey('d', Key::KeyD);
initTranslateKey('e', Key::KeyE);
initTranslateKey('f', Key::KeyF);
initTranslateKey('g', Key::KeyG);
initTranslateKey('h', Key::KeyH);
initTranslateKey('i', Key::KeyI);
initTranslateKey('j', Key::KeyJ);
initTranslateKey('k', Key::KeyK);
initTranslateKey('l', Key::KeyL);
initTranslateKey('m', Key::KeyM);
initTranslateKey('n', Key::KeyN);
initTranslateKey('o', Key::KeyO);
initTranslateKey('p', Key::KeyP);
initTranslateKey('q', Key::KeyQ);
initTranslateKey('r', Key::KeyR);
initTranslateKey('s', Key::KeyS);
initTranslateKey('t', Key::KeyT);
initTranslateKey('u', Key::KeyU);
initTranslateKey('v', Key::KeyV);
initTranslateKey('w', Key::KeyW);
initTranslateKey('x', Key::KeyX);
initTranslateKey('y', Key::KeyY);
initTranslateKey('z', Key::KeyZ);
m_mx = 0;
m_my = 0;
m_mz = 0;
}
int32_t run(int _argc, char** _argv)
{
XInitThreads();
m_display = XOpenDisplay(0);
int32_t screen = DefaultScreen(m_display);
m_depth = DefaultDepth(m_display, screen);
m_visual = DefaultVisual(m_display, screen);
m_root = RootWindow(m_display, screen);
XSetWindowAttributes windowAttrs;
memset(&windowAttrs, 0, sizeof(windowAttrs) );
windowAttrs.background_pixmap = 0;
windowAttrs.border_pixel = 0;
windowAttrs.event_mask = 0
| ButtonPressMask
| ButtonReleaseMask
| ExposureMask
| KeyPressMask
| KeyReleaseMask
| PointerMotionMask
| StructureNotifyMask
;
m_windowAlloc.alloc();
m_window[0] = XCreateWindow(m_display
, m_root
, 0, 0
, ENTRY_DEFAULT_WIDTH, ENTRY_DEFAULT_HEIGHT, 0
, m_depth
, InputOutput
, m_visual
, CWBorderPixel|CWEventMask
, &windowAttrs
);
// Clear window to black.
XSetWindowAttributes attr;
memset(&attr, 0, sizeof(attr) );
XChangeWindowAttributes(m_display, m_window[0], CWBackPixel, &attr);
const char* wmDeleteWindowName = "WM_DELETE_WINDOW";
Atom wmDeleteWindow;
XInternAtoms(m_display, (char **)&wmDeleteWindowName, 1, False, &wmDeleteWindow);
XSetWMProtocols(m_display, m_window[0], &wmDeleteWindow, 1);
XMapWindow(m_display, m_window[0]);
XStoreName(m_display, m_window[0], "BGFX");
//
bgfx::x11SetDisplayWindow(m_display, m_window[0]);
MainThreadEntry mte;
mte.m_argc = _argc;
mte.m_argv = _argv;
bx::Thread thread;
thread.init(mte.threadFunc, &mte);
WindowHandle defaultWindow = { 0 };
m_eventQueue.postSizeEvent(defaultWindow, ENTRY_DEFAULT_WIDTH, ENTRY_DEFAULT_HEIGHT);
s_joystick.init();
while (!m_exit)
{
bool joystick = s_joystick.update(m_eventQueue);
bool xpending = XPending(m_display);
if (!xpending)
{
bx::sleep(joystick ? 8 : 16);
}
else
{
XEvent event;
XNextEvent(m_display, &event);
switch (event.type)
{
case Expose:
break;
case ClientMessage:
if ( (Atom)event.xclient.data.l[0] == wmDeleteWindow)
{
m_eventQueue.postExitEvent();
}
break;
case ButtonPress:
case ButtonRelease:
{
const XButtonEvent& xbutton = event.xbutton;
MouseButton::Enum mb = MouseButton::None;
switch (xbutton.button)
{
case Button1: mb = MouseButton::Left; break;
case Button2: mb = MouseButton::Middle; break;
case Button3: mb = MouseButton::Right; break;
case Button4: ++m_mz; break;
case Button5: --m_mz; break;
}
WindowHandle handle = findHandle(xbutton.window);
if (MouseButton::None != mb)
{
m_eventQueue.postMouseEvent(handle
, xbutton.x
, xbutton.y
, 0
, mb
, event.type == ButtonPress
);
}
else
{
m_eventQueue.postMouseEvent(handle
, m_mx
, m_my
, m_mz
);
}
}
break;
case MotionNotify:
{
const XMotionEvent& xmotion = event.xmotion;
WindowHandle handle = findHandle(xmotion.window);
m_mx = xmotion.x;
m_my = xmotion.y;
m_eventQueue.postMouseEvent(handle
, m_mx
, m_my
, m_mz
);
}
break;
case KeyPress:
case KeyRelease:
{
XKeyEvent& xkey = event.xkey;
KeySym keysym = XLookupKeysym(&xkey, 0);
switch (keysym)
{
case XK_Meta_L: setModifier(Modifier::LeftMeta, KeyPress == event.type); break;
case XK_Meta_R: setModifier(Modifier::RightMeta, KeyPress == event.type); break;
case XK_Control_L: setModifier(Modifier::LeftCtrl, KeyPress == event.type); break;
case XK_Control_R: setModifier(Modifier::RightCtrl, KeyPress == event.type); break;
case XK_Shift_L: setModifier(Modifier::LeftShift, KeyPress == event.type); break;
case XK_Shift_R: setModifier(Modifier::RightShift, KeyPress == event.type); break;
case XK_Alt_L: setModifier(Modifier::LeftAlt, KeyPress == event.type); break;
case XK_Alt_R: setModifier(Modifier::RightAlt, KeyPress == event.type); break;
default:
{
Key::Enum key = fromXk(keysym);
if (Key::None != key)
{
WindowHandle handle = findHandle(xkey.window);
m_eventQueue.postKeyEvent(handle, key, m_modifiers, KeyPress == event.type);
}
}
break;
}
}
break;
case ConfigureNotify:
{
const XConfigureEvent& xev = event.xconfigure;
WindowHandle handle = findHandle(xev.window);
if (isValid(handle) )
{
m_eventQueue.postSizeEvent(handle, xev.width, xev.height);
}
}
break;
}
}
}
thread.shutdown();
s_joystick.shutdown();
XUnmapWindow(m_display, m_window[0]);
XDestroyWindow(m_display, m_window[0]);
return thread.getExitCode();
}
void setModifier(Modifier::Enum _modifier, bool _set)
{
m_modifiers &= ~_modifier;
m_modifiers |= _set ? _modifier : 0;
}
void createWindow(WindowHandle _handle, Msg* msg)
{
XSetWindowAttributes windowAttrs;
memset(&windowAttrs, 0, sizeof(windowAttrs) );
windowAttrs.background_pixmap = 0;
windowAttrs.border_pixel = 0;
windowAttrs.event_mask = 0
| ButtonPressMask
| ButtonReleaseMask
| ExposureMask
| KeyPressMask
| KeyReleaseMask
| PointerMotionMask
| ResizeRedirectMask
| StructureNotifyMask
;
Window window = XCreateWindow(m_display
, m_root
, msg->m_x
, msg->m_y
, msg->m_width
, msg->m_height
, 0
, m_depth
, InputOutput
, m_visual
, CWBorderPixel|CWEventMask
, &windowAttrs
);
m_window[_handle.idx] = window;
// Clear window to black.
XSetWindowAttributes attr;
memset(&attr, 0, sizeof(attr) );
XChangeWindowAttributes(m_display, window, CWBackPixel, &attr);
const char* wmDeleteWindowName = "WM_DELETE_WINDOW";
Atom wmDeleteWindow;
XInternAtoms(m_display, (char **)&wmDeleteWindowName, 1, False, &wmDeleteWindow);
XSetWMProtocols(m_display, window, &wmDeleteWindow, 1);
XMapWindow(m_display, window);
XStoreName(m_display, window, msg->m_title.c_str() );
m_eventQueue.postSizeEvent(_handle, msg->m_width, msg->m_height);
union cast
{
void* p;
::Window w;
};
cast c;
c.w = window;
m_eventQueue.postWindowEvent(_handle, c.p);
delete msg;
}
WindowHandle findHandle(Window _window)
{
bx::LwMutexScope scope(m_lock);
for (uint32_t ii = 0, num = m_windowAlloc.getNumHandles(); ii < num; ++ii)
{
uint16_t idx = m_windowAlloc.getHandleAt(ii);
if (_window == m_window[idx])
{
WindowHandle handle = { idx };
return handle;
}
}
WindowHandle invalid = { UINT16_MAX };
return invalid;
}
uint8_t m_modifiers;
bool m_exit;
int32_t m_mx;
int32_t m_my;
int32_t m_mz;
EventQueue m_eventQueue;
bx::LwMutex m_lock;
bx::HandleAllocT<ENTRY_CONFIG_MAX_WINDOWS> m_windowAlloc;
int32_t m_depth;
Visual* m_visual;
Window m_root;
Display* m_display;
Window m_window[ENTRY_CONFIG_MAX_WINDOWS];
uint32_t m_flags[ENTRY_CONFIG_MAX_WINDOWS];
};
static Context s_ctx;
int32_t MainThreadEntry::threadFunc(void* _userData)
{
MainThreadEntry* self = (MainThreadEntry*)_userData;
int32_t result = main(self->m_argc, self->m_argv);
s_ctx.m_exit = true;
return result;
}
const Event* poll()
{
return s_ctx.m_eventQueue.poll();
}
const Event* poll(WindowHandle _handle)
{
return s_ctx.m_eventQueue.poll(_handle);
}
void release(const Event* _event)
{
s_ctx.m_eventQueue.release(_event);
}
WindowHandle createWindow(int32_t _x, int32_t _y, uint32_t _width, uint32_t _height, uint32_t _flags, const char* _title)
{
bx::LwMutexScope scope(s_ctx.m_lock);
WindowHandle handle = { s_ctx.m_windowAlloc.alloc() };
if (isValid(handle) )
{
Msg* msg = new Msg;
msg->m_x = _x;
msg->m_y = _y;
msg->m_width = _width;
msg->m_height = _height;
msg->m_title = _title;
msg->m_flags = _flags;
s_ctx.createWindow(handle, msg);
}
return handle;
}
void destroyWindow(WindowHandle _handle)
{
if (isValid(_handle) )
{
s_ctx.m_eventQueue.postWindowEvent(_handle, NULL);
XUnmapWindow(s_ctx.m_display, s_ctx.m_window[_handle.idx]);
XDestroyWindow(s_ctx.m_display, s_ctx.m_window[_handle.idx]);
bx::LwMutexScope scope(s_ctx.m_lock);
s_ctx.m_windowAlloc.free(_handle.idx);
}
}
void setWindowPos(WindowHandle _handle, int32_t _x, int32_t _y)
{
BX_UNUSED(_handle, _x, _y);
}
void setWindowSize(WindowHandle _handle, uint32_t _width, uint32_t _height)
{
BX_UNUSED(_handle);
XResizeRequestEvent ev;
ev.type = ResizeRequest;
ev.serial = 0;
ev.send_event = true;
ev.display = s_ctx.m_display;
ev.window = s_ctx.m_window[0];
ev.width = (int)_width;
ev.height = (int)_height;
XSendEvent(s_ctx.m_display, s_ctx.m_window[0], false, ResizeRedirectMask, (XEvent*)&ev);
}
void setWindowTitle(WindowHandle _handle, const char* _title)
{
XStoreName(s_ctx.m_display, s_ctx.m_window[_handle.idx], _title);
}
void toggleWindowFrame(WindowHandle _handle)
{
BX_UNUSED(_handle);
}
void toggleFullscreen(WindowHandle _handle)
{
BX_UNUSED(_handle);
}
void setMouseLock(WindowHandle _handle, bool _lock)
{
BX_UNUSED(_handle, _lock);
}
} // namespace entry
int main(int _argc, char** _argv)
{
using namespace entry;
return s_ctx.run(_argc, _argv);
}
#endif // ENTRY_CONFIG_USE_NATIVE && (BX_PLATFORM_FREEBSD || BX_PLATFORM_LINUX || BX_PLATFORM_RPI)
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