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LookingGlass/client/displayservers/X11/x11.c
Geoffrey McRae 48f0b66a4f [client] input: forward extended mouse buttons 
Map the remaining Linux mouse buttons through Wayland and evdev.

Use one X11 translation for cooked and raw press and release events.

Ignore unsupported horizontal scrolling and extended SPICE buttons.
2026-08-09 02:50:02 +10:00

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/**
* Looking Glass
* Copyright © 2017-2026 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "interface/displayserver.h"
#include "x11.h"
#include "atoms.h"
#include "clipboard.h"
#include "cursor.h"
#include "resources/icondata.h"
#include "resources/no-input-cursor/16.xcur.h"
#include "resources/no-input-cursor/32.xcur.h"
#include <string.h>
#include <unistd.h>
#include <sys/epoll.h>
#include <errno.h>
#include <X11/extensions/XInput2.h>
#include <X11/extensions/scrnsaver.h>
#include <X11/extensions/Xinerama.h>
#include <X11/extensions/Xpresent.h>
#include <X11/extensions/Xrandr.h>
#include <X11/Xcursor/Xcursor.h>
#include <X11/XKBlib.h>
#include <xkbcommon/xkbcommon.h>
#include <GL/glx.h>
#include <GL/glxext.h>
#ifdef ENABLE_EGL
#include <EGL/eglext.h>
#include "egl_dynprocs.h"
#include "eglutil.h"
#endif
#include "app.h"
#include "common/array.h"
#include "common/debug.h"
#include "common/time.h"
#include "common/event.h"
#include "util.h"
struct X11DSState x11;
struct MwmHints
{
unsigned long flags;
unsigned long functions;
unsigned long decorations;
long input_mode;
unsigned long status;
};
enum {
MWM_HINTS_FUNCTIONS = (1L << 0),
MWM_HINTS_DECORATIONS = (1L << 1),
MWM_FUNC_ALL = (1L << 0),
MWM_FUNC_RESIZE = (1L << 1),
MWM_FUNC_MOVE = (1L << 2),
MWM_FUNC_MINIMIZE = (1L << 3),
MWM_FUNC_MAXIMIZE = (1L << 4),
MWM_FUNC_CLOSE = (1L << 5)
};
static const unsigned long icondata[] = {
LG_ICON_WIDTH, LG_ICON_HEIGHT, LG_ICON_PIXELS,
};
// forwards
static void x11SetFullscreen(bool fs);
static int x11EventThread(void * unused);
static void x11XInputEvent(XGenericEventCookie *cookie);
static void x11XPresentEvent(XGenericEventCookie *cookie);
static void x11UpdateKeyboardGroup(void);
static void x11GrabPointer(void);
static void x11SignalFrame(LG_DSWaitFrameResult result)
{
atomic_fetch_or_explicit(
&x11.frameEventFlags, result, memory_order_release);
lgSignalEvent(x11.frameEvent);
}
static uint64_t x11ModePeriod(
const XRRScreenResources * resources, RRMode modeID)
{
for (int i = 0; i < resources->nmode; ++i)
{
const XRRModeInfo * mode = resources->modes + i;
if (mode->id != modeID || !mode->dotClock ||
!mode->hTotal || !mode->vTotal)
continue;
uint64_t pixels = (uint64_t)mode->hTotal * mode->vTotal;
if (mode->modeFlags & RR_DoubleScan)
pixels *= 2;
if (mode->modeFlags & RR_Interlace)
pixels /= 2;
return pixels / mode->dotClock * 1000000000ULL +
pixels % mode->dotClock * 1000000000ULL / mode->dotClock;
}
return 0;
}
static void x11UpdateFramePeriod(void)
{
uint64_t fastest = 0;
const Window root = DefaultRootWindow(x11.display);
XRRScreenResources * resources =
XRRGetScreenResourcesCurrent(x11.display, root);
if (!resources)
{
atomic_store(&x11.nominalPeriod, 0);
return;
}
for (int i = 0; i < resources->ncrtc; ++i)
{
XRRCrtcInfo * crtc =
XRRGetCrtcInfo(x11.display, resources, resources->crtcs[i]);
if (!crtc)
continue;
const bool intersects = crtc->mode && crtc->width && crtc->height &&
x11.rect.x < crtc->x + (int)crtc->width &&
x11.rect.x + x11.rect.w > crtc->x &&
x11.rect.y < crtc->y + (int)crtc->height &&
x11.rect.y + x11.rect.h > crtc->y;
if (intersects)
{
const uint64_t candidate = x11ModePeriod(resources, crtc->mode);
if (candidate && (!fastest || candidate < fastest))
fastest = candidate;
}
XRRFreeCrtcInfo(crtc);
}
XRRFreeScreenResources(resources);
atomic_store(&x11.nominalPeriod, fastest);
}
static bool x11DoPresent(uint64_t msc)
{
static bool startup = true;
if (startup)
{
XPresentPixmap(
x11.display,
x11.window,
x11.presentPixmap,
x11.presentSerial++,
x11.presentRegion, // valid
x11.presentRegion, // update
0, // x_off,
0, // y_off,
None, // target_crtc
None, // wait_fence
None, // idle_fence
PresentOptionNone, // options
0, // target_msc,
0, // divisor,
0, // remainder,
NULL, // notifies
0 // nnotifies
);
startup = false;
return false;
}
static bool first = true;
static uint64_t lastMsc = 0;
bool discontinuity = false;
uint64_t refill;
if (!first)
{
const int64_t queued = (int64_t)(lastMsc - msc);
if (queued < 0 || queued > 50)
{
// The compositor advanced beyond the synthetic queue or reset its MSC.
// Reseed from the observed value or cadence callbacks stop permanently.
lastMsc = msc;
refill = 50;
discontinuity = true;
}
else
refill = 50 - (uint64_t)queued;
}
else
{
refill = 50;
first = false;
lastMsc = msc;
}
if (refill < 25)
return discontinuity;
for (uint64_t i = 0; i < refill; ++i)
{
XPresentPixmap(
x11.display,
x11.window,
x11.presentPixmap,
x11.presentSerial++,
x11.presentRegion, // valid
x11.presentRegion, // update
0, // x_off,
0, // y_off,
None, // target_crtc
None, // wait_fence
None, // idle_fence
PresentOptionNone, // options
++lastMsc, // target_msc,
0, // divisor,
0, // remainder,
NULL, // notifies
0 // nnotifies
);
}
return discontinuity;
}
static void x11Setup(void)
{
X11WM_Default.setup();
X11WM_i3 .setup();
}
static bool x11Probe(void)
{
return getenv("DISPLAY") != NULL;
}
static bool x11EarlyInit(void)
{
XInitThreads();
return true;
}
static void x11CheckEWMHSupport(void)
{
if (x11atoms._NET_SUPPORTING_WM_CHECK == None ||
x11atoms._NET_SUPPORTED == None)
return;
Atom type;
int fmt;
unsigned long num, bytes;
unsigned char *data;
if (XGetWindowProperty(x11.display, DefaultRootWindow(x11.display),
x11atoms._NET_SUPPORTING_WM_CHECK, 0, ~0L, False, XA_WINDOW,
&type, &fmt, &num, &bytes, &data) != Success || !data)
goto out;
Window * windowFromRoot = (Window *)data;
if (XGetWindowProperty(x11.display, *windowFromRoot,
x11atoms._NET_SUPPORTING_WM_CHECK, 0, ~0L, False, XA_WINDOW,
&type, &fmt, &num, &bytes, &data) != Success || !data)
goto out_root;
Window * windowFromChild = (Window *)data;
if (*windowFromChild != *windowFromRoot)
goto out_child;
if (XGetWindowProperty(x11.display, DefaultRootWindow(x11.display),
x11atoms._NET_SUPPORTED, 0, ~0L, False, AnyPropertyType,
&type, &fmt, &num, &bytes, &data) != Success || !data)
goto out_child;
Atom * supported = (Atom *)data;
unsigned long supportedCount = num;
if (XGetWindowProperty(x11.display, *windowFromRoot,
x11atoms._NET_WM_NAME, 0, ~0L, False, AnyPropertyType,
&type, &fmt, &num, &bytes, &data) != Success || !data)
goto out_supported;
char * wmName = (char *)data;
for(unsigned long i = 0; i < supportedCount; ++i)
{
if (supported[i] == x11atoms._NET_WM_STATE_FOCUSED)
x11.ewmhHasFocusEvent = true;
}
DEBUG_INFO("EWMH-compliant window manager detected: %s", wmName);
x11.ewmhSupport = true;
if (strcmp(wmName, "i3") == 0)
x11.wm = &X11WM_i3;
XFree(wmName);
out_supported:
XFree(supported);
out_child:
XFree(windowFromChild);
out_root:
XFree(windowFromRoot);
out:
return;
}
static int x11ErrorHandler(Display * display, XErrorEvent * error)
{
char errorText[1024];
XGetErrorText(display, error->error_code, errorText, sizeof(errorText));
DEBUG_ERROR("X11 Error: %s", errorText);
DEBUG_PRINT_BACKTRACE();
return 0;
}
static int x11IOErrorHandler(Display * display)
{
DEBUG_FATAL("Fatal X11 IO Error");
return 0;
}
static bool x11Init(const LG_DSInitParams params)
{
XIDeviceInfo *devinfo;
int count;
int event, error;
XSetErrorHandler(x11ErrorHandler);
XSetIOErrorHandler(x11IOErrorHandler);
memset(&x11, 0, sizeof(x11));
LG_LOCK_INIT(x11.pointerLock);
atomic_init(&x11.captureActive, false);
atomic_init(&x11.pointerGrabbed, false);
x11.xValuator = -1;
x11.yValuator = -1;
x11.display = XOpenDisplay(NULL);
x11.jitRender = params.jitRender;
x11.wm = &X11WM_Default;
x11.rect = (struct Rect) {
.x = params.x,
.y = params.y,
.w = params.w,
.h = params.h,
};
XSetWindowAttributes swa =
{
.event_mask =
StructureNotifyMask |
PropertyChangeMask |
ExposureMask
};
unsigned long swaMask = CWEventMask;
#ifdef ENABLE_OPENGL
if (params.opengl)
{
GLint glXAttribs[] =
{
GLX_RGBA,
GLX_DOUBLEBUFFER ,
GLX_DEPTH_SIZE , 24,
GLX_STENCIL_SIZE , 0,
GLX_RED_SIZE , 8,
GLX_GREEN_SIZE , 8,
GLX_BLUE_SIZE , 8,
GLX_DEPTH_SIZE , 0,
GLX_SAMPLE_BUFFERS, 0,
GLX_SAMPLES , 0,
None
};
x11.visual = glXChooseVisual(x11.display,
XDefaultScreen(x11.display), glXAttribs);
if (!x11.visual)
{
DEBUG_ERROR("glXChooseVisual failed");
goto fail_display;
}
swa.colormap = XCreateColormap(x11.display, XDefaultRootWindow(x11.display),
x11.visual->visual, AllocNone);
swaMask |= CWColormap;
}
#endif
x11.window = XCreateWindow(
x11.display,
XDefaultRootWindow(x11.display),
params.x, params.y,
params.w, params.h,
0,
x11.visual ? x11.visual->depth : CopyFromParent,
InputOutput,
x11.visual ? x11.visual->visual : CopyFromParent,
swaMask,
&swa);
if (!x11.window)
{
DEBUG_ERROR("XCreateWindow failed");
goto fail_display;
}
XStoreName(x11.display, x11.window, params.title);
XClassHint hint =
{
.res_name = strdup(params.title),
.res_class = strdup(params.appId)
};
XSetClassHint(x11.display, x11.window, &hint);
free(hint.res_name);
free(hint.res_class);
XSizeHints *xsh = XAllocSizeHints();
if (params.center)
{
xsh->flags |= PWinGravity;
xsh->win_gravity = 5; //Center
}
if (!params.resizable)
{
xsh->flags |= PMinSize | PMaxSize;
xsh->min_width = params.w;
xsh->max_width = params.w;
xsh->min_height = params.h;
xsh->max_height = params.h;
}
XSetWMNormalHints(x11.display, x11.window, xsh);
XFree(xsh);
X11AtomsInit();
XSetWMProtocols(x11.display, x11.window, &x11atoms.WM_DELETE_WINDOW, 1);
// check for Extended Window Manager Hints support
x11CheckEWMHSupport();
if (!x11.wm->init())
{
x11.wm = &X11WM_Default;
if (!x11.wm->init())
{
DEBUG_ERROR("Failed to initialize the X11 window manager subsystem");
goto fail_window;
}
}
if (x11atoms._NET_WM_PID)
{
pid_t pid = getpid();
XChangeProperty(
x11.display,
x11.window,
x11atoms._NET_WM_PID,
XA_CARDINAL,
32,
PropModeReplace,
(unsigned char *)&pid,
1
);
}
if (params.borderless)
{
if (x11atoms._MOTIF_WM_HINTS)
{
const struct MwmHints hints =
{
.flags = MWM_HINTS_DECORATIONS,
.decorations = 0
};
XChangeProperty(
x11.display,
x11.window,
x11atoms._MOTIF_WM_HINTS,
x11atoms._MOTIF_WM_HINTS,
32,
PropModeReplace,
(unsigned char *)&hints,
5
);
}
else
{
// fallback to making a utility window, not ideal but better then nothing
XChangeProperty(
x11.display,
x11.window,
x11atoms._NET_WM_WINDOW_TYPE,
XA_ATOM,
32,
PropModeReplace,
(unsigned char *)&x11atoms._NET_WM_WINDOW_TYPE_UTILITY,
1
);
}
}
else
{
XChangeProperty(
x11.display,
x11.window,
x11atoms._NET_WM_WINDOW_TYPE,
XA_ATOM,
32,
PropModeReplace,
(unsigned char *)&x11atoms._NET_WM_WINDOW_TYPE_NORMAL,
1
);
}
if (params.maximize)
{
Atom wmState[2] =
{
x11atoms._NET_WM_STATE_MAXIMIZED_HORZ,
x11atoms._NET_WM_STATE_MAXIMIZED_VERT
};
XChangeProperty(
x11.display,
x11.window,
x11atoms._NET_WM_STATE,
XA_ATOM,
32,
PropModeReplace,
(unsigned char *)&wmState,
2
);
}
if (x11atoms._NET_REQUEST_FRAME_EXTENTS)
{
XEvent reqevent =
{
.xclient =
{
.type = ClientMessage,
.window = x11.window,
.format = 32,
.message_type = x11atoms._NET_REQUEST_FRAME_EXTENTS
}
};
XSendEvent(x11.display, DefaultRootWindow(x11.display), False,
SubstructureNotifyMask | SubstructureRedirectMask, &reqevent);
}
int major = 2;
int minor = 0;
if (XIQueryVersion(x11.display, &major, &minor) != Success)
{
DEBUG_ERROR("Failed to query the XInput version");
goto fail_window;
}
DEBUG_INFO("X11 XInput %d.%d in use", major, minor);
devinfo = XIQueryDevice(x11.display, XIAllDevices, &count);
if (!devinfo)
{
DEBUG_ERROR("XIQueryDevice failed");
goto fail_window;
}
Atom rel_x = XInternAtom(x11.display, "Rel X", True);
Atom rel_y = XInternAtom(x11.display, "Rel Y", True);
bool havePointer = false;
bool haveKeyboard = false;
for(int i = 0; i < count; ++i)
{
/* look for the master pointing device */
if (!havePointer && devinfo[i].use == XIMasterPointer)
{
for(int j = 0; j < devinfo[i].num_classes; ++j)
{
XIAnyClassInfo *cdevinfo =
(XIAnyClassInfo *)(devinfo[i].classes[j]);
if (cdevinfo->type == XIValuatorClass)
{
XIValuatorClassInfo *vdevinfo = (XIValuatorClassInfo *)cdevinfo;
if (vdevinfo->label == rel_x || (!vdevinfo->label &&
vdevinfo->number == 0 && vdevinfo->mode == XIModeRelative))
x11.xValuator = vdevinfo->number;
else if (vdevinfo->label == rel_y || (!vdevinfo->label &&
vdevinfo->number == 1 && vdevinfo->mode == XIModeRelative))
x11.yValuator = vdevinfo->number;
}
}
if (x11.xValuator >= 0 && x11.yValuator >= 0)
{
havePointer = true;
x11.pointerDev = devinfo[i].deviceid;
}
}
/* look for the master keyboard device */
if (!haveKeyboard && devinfo[i].use == XIMasterKeyboard)
for(int j = 0; j < devinfo[i].num_classes; ++j)
{
XIAnyClassInfo *cdevinfo =
(XIAnyClassInfo *)(devinfo[i].classes[j]);
if (cdevinfo->type == XIKeyClass)
{
haveKeyboard = true;
x11.keyboardDev = devinfo[i].deviceid;
break;
}
}
}
if (!havePointer)
{
DEBUG_ERROR("Failed to find the master pointing device");
XIFreeDeviceInfo(devinfo);
goto fail_window;
}
if (!haveKeyboard)
{
DEBUG_ERROR("Failed to find the master keyboard device");
XIFreeDeviceInfo(devinfo);
goto fail_window;
}
XDisplayKeycodes(x11.display, &x11.minKeycode, &x11.maxKeycode);
x11UpdateKeyboardGroup();
XIFreeDeviceInfo(devinfo);
XQueryExtension(x11.display, "XInputExtension", &x11.xinputOp, &event, &error);
XIEventMask eventmask;
unsigned char mask[XIMaskLen(XI_LASTEVENT)] = { 0 };
eventmask.deviceid = XIAllMasterDevices;
eventmask.mask_len = sizeof(mask);
eventmask.mask = mask;
XISetMask(mask, XI_FocusIn );
XISetMask(mask, XI_FocusOut);
XISetMask(mask, XI_Enter );
XISetMask(mask, XI_Leave );
XISetMask(mask, XI_Motion );
XISetMask(mask, XI_KeyPress );
XISetMask(mask, XI_KeyRelease );
XISetMask(mask, XI_ButtonPress );
XISetMask(mask, XI_ButtonRelease);
if (XISelectEvents(x11.display, x11.window, &eventmask, 1) != Success)
{
XFree(mask);
DEBUG_ERROR("Failed to select the xinput events");
goto fail_window;
}
unsigned long value = 1;
XChangeProperty(
x11.display,
x11.window,
x11atoms._NET_WM_BYPASS_COMPOSITOR,
XA_CARDINAL,
32,
PropModeReplace,
(unsigned char *)&value,
1
);
XChangeProperty(
x11.display,
x11.window,
x11atoms._NET_WM_ICON,
XA_CARDINAL,
32,
PropModeReplace,
(unsigned char *)icondata,
ARRAY_LENGTH(icondata)
);
/* create the blank cursor */
{
static char data[] = { 0x00 };
XColor dummy;
Pixmap temp = XCreateBitmapFromData(x11.display, x11.window, data, 1, 1);
x11.cursors[LG_POINTER_NONE] = XCreatePixmapCursor(x11.display, temp, temp,
&dummy, &dummy, 0, 0);
XFreePixmap(x11.display, temp);
}
XcursorImages * images;
if (params.largeCursorDot)
images = x11cursor_load(b_no_input_cursor_32_xcur,
b_no_input_cursor_32_xcur_size);
else
images = x11cursor_load(b_no_input_cursor_16_xcur,
b_no_input_cursor_16_xcur_size);
x11.cursors[LG_POINTER_SQUARE] =
XcursorImagesLoadCursor(x11.display, images);
XcursorImagesDestroy(images);
/* initialize the rest of the cursors */
const char * cursorLookup[LG_POINTER_COUNT] = {
NULL , // LG_POINTER_NONE
NULL , // LG_POINTER_SQUARE
"left_ptr" , // LG_POINTER_ARROW
"text" , // LG_POINTER_INPUT
"move" , // LG_POINTER_MOVE
"ns-resize" , // LG_POINTER_RESIZE_NS
"ew-resize" , // LG_POINTER_RESIZE_EW
"nesw-resize" , // LG_POINTER_RESIZE_NESW
"nwse-resize" , // LG_POINTER_RESIZE_NWSE
"hand" , // LG_POINTER_HAND
"not-allowed" , // LG_POINTER_NOT_ALLOWED
};
const char * fallbackLookup[LG_POINTER_COUNT] = {
NULL , // LG_POINTER_NONE
NULL , // LG_POINTER_SQUARE
"left_ptr" , // LG_POINTER_ARROW
"xterm" , // LG_POINTER_INPUT
"fluer" , // LG_POINTER_MOVE
"sb_v_double_arrow", // LG_POINTER_RESIZE_NS
"sb_h_double_arrow", // LG_POINTER_RESIZE_EW
"sizing" , // LG_POINTER_RESIZE_NESW
"sizing" , // LG_POINTER_RESIZE_NWSE
"hand2" , // LG_POINTER_HAND
"X_cursor" , // LG_POINTER_NOT_ALLOWED
};
for(int i = 0; i < LG_POINTER_COUNT; ++i)
{
if (!cursorLookup[i])
continue;
x11.cursors[i] = XcursorLibraryLoadCursor(x11.display, cursorLookup[i]);
if (!x11.cursors[i])
x11.cursors[i] = XcursorLibraryLoadCursor(x11.display, fallbackLookup[i]);
}
/* default to the square cursor */
XDefineCursor(x11.display, x11.window, x11.cursors[LG_POINTER_SQUARE]);
x11.xrandrSupported =
XRRQueryExtension(x11.display, &x11.xrandrEvent, &error);
if (x11.xrandrSupported)
{
XRRSelectInput(x11.display, DefaultRootWindow(x11.display),
RRScreenChangeNotifyMask | RRCrtcChangeNotifyMask |
RROutputChangeNotifyMask);
x11UpdateFramePeriod();
}
else
DEBUG_WARN("X11 nominal output refresh is unavailable");
if (x11.jitRender)
{
x11.frameEvent = lgCreateEvent(true, 0);
XPresentQueryExtension(x11.display, &x11.xpresentOp, &event, &error);
XPresentSelectInput(x11.display, x11.window, PresentCompleteNotifyMask);
x11.presentPixmap = XCreatePixmap(x11.display, x11.window, 1, 1, 24);
x11.presentRegion = XFixesCreateRegion(x11.display, &(XRectangle){0}, 1);
}
XMapWindow(x11.display, x11.window);
XFlush(x11.display);
if (!params.center)
XMoveWindow(x11.display, x11.window, params.x, params.y);
if (params.fullscreen)
x11.doFullscreenOnExpose = true;
XSetLocaleModifiers(""); // Load XMODIFIERS
x11.xim = XOpenIM(x11.display, 0, 0, 0);
if (!x11.xim)
{
// disable IME
XSetLocaleModifiers("@im=none");
x11.xim = XOpenIM(x11.display, 0, 0, 0);
}
if (x11.xim)
{
x11.xic = XCreateIC(
x11.xim,
XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
XNClientWindow, x11.window,
XNFocusWindow, x11.window,
NULL
);
}
else
DEBUG_WARN("Failed to initialize X Input Method");
if (x11.xic)
{
XSetICFocus(x11.xic);
XSelectInput(x11.display, x11.window, StructureNotifyMask | ExposureMask |
PropertyChangeMask | KeyPressMask);
}
else
DEBUG_WARN("Failed to initialize X Input Context, typing will not work");
if (!lgCreateThread("X11EventThread", x11EventThread, NULL, &x11.eventThread))
{
DEBUG_ERROR("Failed to create the x11 event thread");
goto fail_window;
}
if (x11.jitRender)
x11DoPresent(0);
return true;
fail_window:
XDestroyWindow(x11.display, x11.window);
fail_display:
XCloseDisplay(x11.display);
return false;
}
static void x11Startup(void)
{
}
static void x11Shutdown(void)
{
if (x11.jitRender)
x11SignalFrame(LG_DS_WAIT_FRAME_INTERRUPTED);
}
static void x11Free(void)
{
lgJoinThread(x11.eventThread, NULL);
if (x11.jitRender)
{
lgFreeEvent(x11.frameEvent);
XFreePixmap(x11.display, x11.presentPixmap);
XFixesDestroyRegion(x11.display, x11.presentRegion);
}
if (x11.window)
XDestroyWindow(x11.display, x11.window);
for(int i = 0; i < LG_POINTER_COUNT; ++i)
if (x11.cursors[i])
XFreeCursor(x11.display, x11.cursors[i]);
LG_LOCK_FREE(x11.pointerLock);
x11.wm->deinit();
XCloseDisplay(x11.display);
}
static bool x11GetProp(LG_DSProperty prop, void *ret)
{
switch (prop)
{
case LG_DS_WARP_SUPPORT:
*(enum LG_DSWarpSupport*)ret = LG_DS_WARP_SCREEN;
return true;
case LG_DS_MAX_MULTISAMPLE:
{
Display * dpy = XOpenDisplay(NULL);
if (!dpy)
return false;
XVisualInfo queryTemplate;
queryTemplate.screen = 0;
int visualCount;
int maxSamples = -1;
XVisualInfo * visuals = XGetVisualInfo(dpy, VisualScreenMask,
&queryTemplate, &visualCount);
for (int i = 0; i < visualCount; i++)
{
XVisualInfo * visual = &visuals[i];
int res, supportsGL;
// Some GLX visuals do not use GL, and these must be ignored in our search.
if ((res = glXGetConfig(dpy, visual, GLX_USE_GL, &supportsGL)) != 0 ||
!supportsGL)
continue;
int sampleBuffers, samples;
if ((res = glXGetConfig(dpy, visual, GLX_SAMPLE_BUFFERS, &sampleBuffers)) != 0)
continue;
// Will be 1 if this visual supports multisampling
if (sampleBuffers != 1)
continue;
if ((res = glXGetConfig(dpy, visual, GLX_SAMPLES, &samples)) != 0)
continue;
// Track the largest number of samples supported
if (samples > maxSamples)
maxSamples = samples;
}
XFree(visuals);
XCloseDisplay(dpy);
*(int*)ret = maxSamples;
return true;
}
default:
return true;
}
}
static int x11EventThread(void * unused)
{
int epollfd = epoll_create1(0);
if (epollfd == -1)
{
DEBUG_ERROR("epolld_create1 failure");
return 0;
}
struct epoll_event ev = { .events = EPOLLIN };
const int fd = ConnectionNumber(x11.display);
if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) == -1)
{
close(epollfd);
DEBUG_ERROR("epoll_ctl failed");
return 0;
}
while(app_isRunning())
{
const uint64_t lastWMEvent = atomic_load(&x11.lastWMEvent);
if (x11.invalidateAll && microtime() - lastWMEvent > 100000UL)
{
x11.invalidateAll = false;
app_invalidateWindow(true);
}
if (!XPending(x11.display))
{
struct epoll_event events[1];
int nfds = epoll_wait(epollfd, events, 1, 100);
if (nfds == -1)
{
if (errno == EINTR)
continue;
close(epollfd);
DEBUG_ERROR("epoll_wait failure");
return 0;
}
if (nfds == 0 || !XPending(x11.display))
continue;
}
XEvent xe;
XNextEvent(x11.display, &xe);
if (x11.xrandrSupported &&
(xe.type == x11.xrandrEvent + RRScreenChangeNotify ||
xe.type == x11.xrandrEvent + RRNotify))
{
if (xe.type == x11.xrandrEvent + RRScreenChangeNotify)
XRRUpdateConfiguration(&xe);
x11UpdateFramePeriod();
continue;
}
// call the clipboard handling code
if (x11CBEventThread(&xe))
continue;
switch(xe.type)
{
case ClientMessage:
if (xe.xclient.data.l[0] == x11atoms.WM_DELETE_WINDOW)
app_handleCloseEvent();
continue;
case ConfigureNotify:
{
atomic_store(&x11.lastWMEvent, microtime());
int x, y;
/* the window may have been re-parented so we need to translate to
* ensure we get the screen top left position of the window */
Window child;
XTranslateCoordinates(
x11.display,
x11.window,
DefaultRootWindow(x11.display),
0, 0,
&x,
&y,
&child);
x11.rect.x = x;
x11.rect.y = y;
x11.rect.w = xe.xconfigure.width;
x11.rect.h = xe.xconfigure.height;
if (x11.xrandrSupported)
x11UpdateFramePeriod();
app_updateWindowPos(x, y);
if (x11.fullscreen)
{
struct Border border = {0};
app_handleResizeEvent(x11.rect.w, x11.rect.h, 1, border);
}
else
app_handleResizeEvent(x11.rect.w, x11.rect.h, 1, x11.border);
break;
}
case Expose:
{
atomic_store(&x11.lastWMEvent, microtime());
x11.invalidateAll = true;
if (x11.doFullscreenOnExpose)
{
x11SetFullscreen(true);
x11.doFullscreenOnExpose = false;
}
break;
}
case GenericEvent:
{
XGenericEventCookie *cookie = (XGenericEventCookie*)&xe.xcookie;
if (cookie->extension == x11.xinputOp)
{
XGetEventData(x11.display, cookie);
x11XInputEvent(cookie);
XFreeEventData(x11.display, cookie);
}
else if (cookie->extension == x11.xpresentOp)
{
XGetEventData(x11.display, cookie);
x11XPresentEvent(cookie);
XFreeEventData(x11.display, cookie);
}
break;
}
case PropertyNotify:
// ignore property events that are not for us
if (xe.xproperty.display != x11.display ||
xe.xproperty.window != x11.window ||
xe.xproperty.state != PropertyNewValue)
continue;
if (xe.xproperty.atom == x11atoms._NET_WM_STATE)
{
atomic_store(&x11.lastWMEvent, microtime());
Atom type;
int fmt;
unsigned long num, bytes;
unsigned char *data;
if (XGetWindowProperty(x11.display, x11.window,
x11atoms._NET_WM_STATE, 0, ~0L, False, AnyPropertyType,
&type, &fmt, &num, &bytes, &data) != Success)
break;
bool fullscreen = false;
bool focused = false;
for(unsigned long i = 0; i < num; ++i)
{
Atom prop = ((Atom *)data)[i];
if (prop == x11atoms._NET_WM_STATE_FULLSCREEN)
fullscreen = true;
else if (prop == x11atoms._NET_WM_STATE_FOCUSED)
focused = true;
}
if (x11.ewmhHasFocusEvent && x11.focused != focused)
{
x11.focused = focused;
app_handleFocusEvent(focused);
}
x11.fullscreen = fullscreen;
XFree(data);
break;
}
if (xe.xproperty.atom == x11atoms._NET_FRAME_EXTENTS)
{
atomic_store(&x11.lastWMEvent, microtime());
Atom type;
int fmt;
unsigned long num, bytes;
unsigned char *data;
if (XGetWindowProperty(x11.display, x11.window,
x11atoms._NET_FRAME_EXTENTS, 0, 4, False, AnyPropertyType,
&type, &fmt, &num, &bytes, &data) != Success)
break;
if (num >= 4)
{
long *cardinal = (long *)data;
x11.border.left = cardinal[0];
x11.border.right = cardinal[1];
x11.border.top = cardinal[2];
x11.border.bottom = cardinal[3];
app_handleResizeEvent(x11.rect.w, x11.rect.h, 1, x11.border);
}
XFree(data);
break;
}
break;
}
}
close(epollfd);
return 0;
}
static enum Modifiers keySymToModifier(KeySym sym)
{
switch (sym)
{
case XK_Control_L: return MOD_CTRL_LEFT;
case XK_Control_R: return MOD_CTRL_RIGHT;
case XK_Shift_L: return MOD_SHIFT_LEFT;
case XK_Shift_R: return MOD_SHIFT_RIGHT;
case XK_Alt_L: return MOD_ALT_LEFT;
case XK_Alt_R: return MOD_ALT_RIGHT;
case XK_Super_L: return MOD_SUPER_LEFT;
case XK_Super_R: return MOD_SUPER_RIGHT;
default: return -1;
}
}
static void updateModifiers(void)
{
app_handleKeyboardModifiers(
x11.modifiers[MOD_CTRL_LEFT] || x11.modifiers[MOD_CTRL_RIGHT],
x11.modifiers[MOD_SHIFT_LEFT] || x11.modifiers[MOD_SHIFT_RIGHT],
x11.modifiers[MOD_ALT_LEFT] || x11.modifiers[MOD_ALT_RIGHT],
x11.modifiers[MOD_SUPER_LEFT] || x11.modifiers[MOD_SUPER_RIGHT]
);
}
static void x11UpdateKeyboardGroup(void)
{
XkbStateRec state;
if (XkbGetState(x11.display, XkbUseCoreKbd, &state) == Success)
atomic_store(&x11.keyboardGroup, state.group);
}
static int x11MapButton(unsigned int button)
{
if (button >= 1 && button <= 5)
return button;
/* X11 reserves buttons 6 and 7 for horizontal scrolling. */
if (button >= 8 && button < 34)
return button - 2;
return 0;
}
static void setFocus(bool focused, double x, double y)
{
if (x11.focused == focused)
return;
if (focused)
x11UpdateKeyboardGroup();
x11.focused = focused;
app_updateCursorPos(x, y);
app_handleFocusEvent(focused);
}
static bool x11GetKeyLabel(int sc, char * label, size_t size)
{
const int keycode = sc + x11.minKeycode;
if (keycode < x11.minKeycode || keycode > x11.maxKeycode)
return false;
xkb_keysym_t sym = XkbKeycodeToKeysym(
x11.display, keycode, atomic_load(&x11.keyboardGroup), 0);
sym = xkb_keysym_to_upper(sym);
const uint32_t codepoint = xkb_keysym_to_utf32(sym);
return codepoint > 0x20 && codepoint != 0x7F &&
xkb_keysym_to_utf8(sym, label, size) > 0;
}
static void x11XInputEvent(XGenericEventCookie *cookie)
{
static uint32_t button_state = 0;
switch(cookie->evtype)
{
case XI_FocusIn:
{
XIFocusOutEvent *xie = cookie->data;
if (x11.ewmhHasFocusEvent)
{
// if meta ungrab for move/resize
if (xie->mode == XINotifyUngrab)
setFocus(true, xie->event_x, xie->event_y);
return;
}
atomic_store(&x11.lastWMEvent, microtime());
if (x11.focused)
return;
if (xie->mode != XINotifyNormal &&
xie->mode != XINotifyWhileGrabbed &&
xie->mode != XINotifyUngrab)
return;
setFocus(true, xie->event_x, xie->event_y);
return;
}
case XI_FocusOut:
{
XIFocusOutEvent *xie = cookie->data;
if (x11.ewmhHasFocusEvent)
{
// if meta grab for move/resize
if (xie->mode == XINotifyGrab)
setFocus(false, xie->event_x, xie->event_y);
return;
}
atomic_store(&x11.lastWMEvent, microtime());
if (!x11.focused)
return;
if (xie->mode != XINotifyNormal &&
xie->mode != XINotifyWhileGrabbed &&
xie->mode != XINotifyGrab)
return;
setFocus(false, xie->event_x, xie->event_y);
return;
}
case XI_Enter:
{
atomic_store(&x11.lastWMEvent, microtime());
XIEnterEvent *xie = cookie->data;
if (x11.entered || xie->event != x11.window ||
xie->mode != XINotifyNormal)
return;
app_updateCursorPos(xie->event_x, xie->event_y);
app_handleEnterEvent(true);
x11.entered = true;
return;
}
case XI_Leave:
{
atomic_store(&x11.lastWMEvent, microtime());
XILeaveEvent *xie = cookie->data;
if (!x11.entered || xie->event != x11.window ||
button_state != 0 || app_isCaptureMode() ||
xie->mode == NotifyGrab)
return;
app_updateCursorPos(xie->event_x, xie->event_y);
app_handleEnterEvent(false);
x11.entered = false;
/**
* Because there is a race with the pointer ungrab the enter event for the
* next window is sometimes sent with the mode NotifyUngrab, unfortunatly
* some window managers such as i3 will ignore these which breaks focus
* follows mouse mode. To correct this we generate and send a normal
* EnterNotify event.
*/
int root_x, root_y, win_x, win_y;
Window root_win, child_win;
unsigned int mask;
XQueryPointer(x11.display, DefaultRootWindow(x11.display), &root_win,
&child_win, &root_x, &root_y, &win_x, &win_y, &mask);
int target_x, target_y;
Window target_root;
XTranslateCoordinates(x11.display, DefaultRootWindow(x11.display),
child_win, root_x, root_y, &target_x, &target_y, &target_root);
XEvent event;
memset(&event, 0, sizeof(event));
event.type = EnterNotify;
event.xcrossing.serial = 0;
event.xcrossing.send_event = True;
event.xcrossing.display = x11.display;
event.xcrossing.window = child_win;
event.xcrossing.root = root_win;
event.xcrossing.subwindow = child_win;
event.xcrossing.time = CurrentTime;
event.xcrossing.mode = NotifyNormal;
event.xcrossing.detail = NotifyNonlinear;
event.xcrossing.same_screen = True;
event.xcrossing.focus = False;
event.xcrossing.x = target_x;
event.xcrossing.y = target_y;
event.xcrossing.x_root = root_x;
event.xcrossing.y_root = root_y;
XSendEvent(x11.display, child_win, True, EnterWindowMask, &event);
XFlush(x11.display);
return;
}
case XI_KeyPress:
{
if (!x11.focused || x11.keyboardGrabbed)
return;
XIDeviceEvent *device = cookie->data;
atomic_store(&x11.keyboardGroup, device->group.effective);
app_handleKeyPress(device->detail - x11.minKeycode);
if (!x11.xic || !app_isOverlayMode())
return;
char buffer[128];
KeySym sym;
Status status;
int count;
XKeyPressedEvent ev = {
.display = x11.display,
.window = x11.window,
.type = KeyPress,
.keycode = device->detail,
.state = device->mods.effective,
};
count = Xutf8LookupString(x11.xic, &ev, buffer, sizeof(buffer),
&sym, &status);
if (status == XBufferOverflow || count >= sizeof(buffer))
{
DEBUG_WARN("Typing too many characters at once, ignoring");
return;
}
if (status == XLookupChars || status == XLookupBoth)
{
buffer[count] = '\0';
app_handleKeyboardTyped(buffer);
}
if (status == XLookupKeySym || status == XLookupBoth)
{
int modifier = keySymToModifier(sym);
if (modifier >= 0)
{
x11.modifiers[modifier] = true;
updateModifiers();
}
}
return;
}
case XI_KeyRelease:
{
if (!x11.focused || x11.keyboardGrabbed)
return;
XIDeviceEvent *device = cookie->data;
app_handleKeyRelease(device->detail - x11.minKeycode);
if (!x11.xic || !app_isOverlayMode())
return;
XKeyPressedEvent ev = {
.display = x11.display,
.window = x11.window,
.type = KeyRelease,
.keycode = device->detail,
.state = device->mods.effective,
};
KeySym sym = XLookupKeysym(&ev, 0);
int modifier = keySymToModifier(sym);
if (modifier >= 0)
{
x11.modifiers[modifier] = false;
updateModifiers();
}
return;
}
case XI_RawKeyPress:
{
if (!x11.focused)
return;
XIRawEvent *raw = cookie->data;
app_handleKeyPress(raw->detail - x11.minKeycode);
return;
}
case XI_RawKeyRelease:
{
if (!x11.focused)
return;
XIRawEvent *raw = cookie->data;
app_handleKeyRelease(raw->detail - x11.minKeycode);
return;
}
case XI_ButtonPress:
{
if (!x11.focused || !x11.entered)
return;
XIDeviceEvent *device = cookie->data;
const int button = x11MapButton(device->detail);
if (button == 4)
app_handleWheelMotion(-0.5);
else if (button == 5)
app_handleWheelMotion(0.5);
else if (button)
app_handleButtonPress(button);
return;
}
case XI_ButtonRelease:
{
if (!x11.focused || !x11.entered)
return;
XIDeviceEvent *device = cookie->data;
const int button = x11MapButton(device->detail);
if (button && button != 4 && button != 5)
app_handleButtonRelease(button);
return;
}
case XI_RawButtonPress:
{
if (!x11.focused || !x11.entered)
return;
XIRawEvent *raw = cookie->data;
const int button = x11MapButton(raw->detail);
if (!button)
return;
/* filter out duplicate events */
static Time prev_time = 0;
static unsigned int prev_detail = 0;
if (raw->time == prev_time && raw->detail == prev_detail)
return;
prev_time = raw->time;
prev_detail = raw->detail;
button_state |= UINT32_C(1) << button;
app_handleButtonPress(button);
return;
}
case XI_RawButtonRelease:
{
if (!x11.focused || !x11.entered)
return;
XIRawEvent *raw = cookie->data;
const int button = x11MapButton(raw->detail);
if (!button)
return;
/* filter out duplicate events */
static Time prev_time = 0;
static unsigned int prev_detail = 0;
if (raw->time == prev_time && raw->detail == prev_detail)
return;
prev_time = raw->time;
prev_detail = raw->detail;
button_state &= ~(UINT32_C(1) << button);
app_handleButtonRelease(button);
return;
}
case XI_Motion:
{
XIDeviceEvent *device = cookie->data;
app_updateCursorPos(device->event_x, device->event_y);
if (!atomic_load_explicit(&x11.pointerGrabbed, memory_order_acquire))
app_handleMouseRelative(0.0, 0.0, 0.0, 0.0);
return;
}
case XI_RawMotion:
{
if (!x11.focused || !x11.entered)
return;
XIRawEvent *raw = cookie->data;
double raw_axis[2] = { 0 };
double axis[2] = { 0 };
/* select the active validators for the X & Y axis */
double *valuator = raw->valuators.values;
double *r_value = raw->raw_values;
bool has_axes = false;
for(int i = 0; i < raw->valuators.mask_len * 8; ++i)
{
if (XIMaskIsSet(raw->valuators.mask, i))
{
if (i == x11.xValuator)
{
raw_axis[0] = *r_value;
axis [0] = *valuator;
has_axes = true;
}
else if (i == x11.yValuator)
{
raw_axis[1] = *r_value;
axis [1] = *valuator;
has_axes = true;
}
++valuator;
++r_value;
}
}
/* filter out events with no axis data */
if (!has_axes)
return;
/* filter out duplicate events */
static Time prev_time = 0;
static double prev_axis[2] = {0};
if (raw->time == prev_time &&
axis[0] == prev_axis[0] &&
axis[1] == prev_axis[1])
return;
prev_time = raw->time;
prev_axis[0] = axis[0];
prev_axis[1] = axis[1];
app_handleMouseRelative(axis[0], axis[1], raw_axis[0], raw_axis[1]);
return;
}
}
}
#include <math.h>
static void x11XPresentEvent(XGenericEventCookie *cookie)
{
switch(cookie->evtype)
{
case PresentCompleteNotify:
{
XPresentCompleteNotifyEvent * e = cookie->data;
const uint64_t previousMsc = atomic_load(&x11.presentMsc);
const uint64_t previousUst = atomic_load(&x11.presentUst);
if (previousMsc && e->msc > previousMsc && e->ust > previousUst)
{
const uint64_t period =
(e->ust - previousUst) * 1000 / (e->msc - previousMsc);
if (period)
atomic_store(&x11.presentPeriod, period);
}
if (x11DoPresent(e->msc))
atomic_store_explicit(
&x11.presentDiscontinuity, true, memory_order_release);
atomic_store(&x11.presentMsc, e->msc);
atomic_store(&x11.presentUst, e->ust);
x11SignalFrame(LG_DS_WAIT_FRAME_CADENCE);
break;
}
}
}
static bool x11GetFramePeriod(uint64_t * period)
{
const uint64_t value = atomic_load(&x11.nominalPeriod);
if (!value)
return false;
*period = value;
return true;
}
#ifdef ENABLE_EGL
static EGLDisplay x11GetEGLDisplay(void)
{
EGLDisplay ret;
const char *early_exts = eglQueryString(NULL, EGL_EXTENSIONS);
if (util_hasGLExt(early_exts, "EGL_KHR_platform_base") &&
g_egl_dynProcs.eglGetPlatformDisplay)
{
DEBUG_INFO("Using eglGetPlatformDisplay");
ret = g_egl_dynProcs.eglGetPlatformDisplay(EGL_PLATFORM_X11_KHR,
x11.display, NULL);
}
else if (util_hasGLExt(early_exts, "EGL_EXT_platform_base") &&
g_egl_dynProcs.eglGetPlatformDisplayEXT)
{
DEBUG_INFO("Using eglGetPlatformDisplayEXT");
ret = g_egl_dynProcs.eglGetPlatformDisplayEXT(EGL_PLATFORM_X11_KHR,
x11.display, NULL);
}
else
{
DEBUG_INFO("Using eglGetDisplay");
ret = eglGetDisplay(x11.display);
}
return ret;
}
static EGLNativeWindowType x11GetEGLNativeWindow(void)
{
return (EGLNativeWindowType)x11.window;
}
static bool x11EGLSwapBuffers(EGLDisplay display, EGLSurface surface,
const struct Rect * damage, int count, uint64_t frameToken,
uint64_t * swapTime, bool * presentTracked)
{
static struct SwapWithDamageData data = {0};
if (!data.init)
swapWithDamageInit(&data, display);
(void)frameToken;
*presentTracked = false;
const uint64_t start = nanotime();
const bool result =
swapWithDamage(&data, display, surface, damage, count);
*swapTime = nanotime() - start;
return result;
}
#endif
#ifdef ENABLE_OPENGL
static LG_DSGLContext x11GLCreateContext(void)
{
return (LG_DSGLContext)
glXCreateContext(x11.display, x11.visual, NULL, GL_TRUE);
}
static void x11GLDeleteContext(LG_DSGLContext context)
{
glXDestroyContext(x11.display, (GLXContext)context);
}
static void x11GLMakeCurrent(LG_DSGLContext context)
{
glXMakeCurrent(x11.display, x11.window, (GLXContext)context);
}
static void x11GLSetSwapInterval(int interval)
{
static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = NULL;
if (!glXSwapIntervalEXT)
{
glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC) glXGetProcAddressARB(
(const GLubyte *) "glXSwapIntervalEXT");
if (!glXSwapIntervalEXT)
DEBUG_FATAL("Failed to load glXSwapIntervalEXT");
}
glXSwapIntervalEXT(x11.display, x11.window, interval);
}
static void x11GLSwapBuffers(void)
{
glXSwapBuffers(x11.display, x11.window);
}
#endif
static LG_DSWaitFrameResult x11WaitFrame(void)
{
/* wait until we are woken up by the present event */
lgWaitEvent(x11.frameEvent, TIMEOUT_INFINITE);
LG_DSWaitFrameResult result = atomic_exchange_explicit(
&x11.frameEventFlags, LG_DS_WAIT_FRAME_NONE, memory_order_acquire);
/* Interrupts carry no new presentation timestamp and must not perturb the
* calibration state. */
if (!(result & LG_DS_WAIT_FRAME_CADENCE))
return result;
#define WARMUP_TIME 3000000 //2s
#define CALIBRATION_COUNT 400
const uint64_t ust = atomic_load(&x11.presentUst);
const uint64_t msc = atomic_load(&x11.presentMsc);
const bool discontinuity = atomic_exchange_explicit(
&x11.presentDiscontinuity, false, memory_order_acquire);
static bool warmup = true;
static uint64_t expire = 0;
if (warmup)
{
if (!expire)
{
DEBUG_INFO("Warming up...");
expire = ust + WARMUP_TIME;
}
if (ust < expire)
return result;
warmup = false;
DEBUG_INFO("Warmup done, doing calibration...");
}
/* calibrate a delay to push our presentation time forward as far as
* possible without skipping frames */
static int calibrate = 0;
static uint64_t lastts = 0;
static uint64_t lastmsc = 0;
static uint64_t delay = 0;
static int skipCount = 0;
static uint64_t lastSkipTime = 0;
if (discontinuity)
{
// Do not turn a compositor recovery jump into a render-skip sample.
lastts = ust;
lastmsc = msc;
skipCount = 0;
lastSkipTime = 0;
if (calibrate < CALIBRATION_COUNT)
result |= LG_DS_WAIT_FRAME_FORCE_RENDER;
return result;
}
uint64_t deltamsc = 0;
if (lastts)
{
uint64_t deltats = ust - lastts;
deltamsc = msc - lastmsc;
if (calibrate == 0)
{
if (!delay)
delay = deltats / 2;
else
{
/* increase the delay until we see a skip */
if (deltamsc < 2)
delay += 100;
else
{
delay -= 100;
++calibrate;
deltamsc = 0;
}
}
}
else
{
if (calibrate < CALIBRATION_COUNT)
{
/* every skip we back off the delay */
if (deltamsc > 1)
{
/* prevent underflow */
if (delay - 100 < delay)
{
delay -= 100;
calibrate = 1;
deltamsc = 0;
}
else
{
/* if underflow, we are simply too slow, no delay */
delay = 0;
calibrate = CALIBRATION_COUNT;
}
}
/* if we have finished, print out the delay */
if (++calibrate == CALIBRATION_COUNT)
{
/* delays shorter then 1ms are unmaintainable */
if (delay < 1000)
{
delay = 0;
DEBUG_INFO("Calibration done, no delay required");
}
else
DEBUG_INFO("Calibration done, delay = %lu us", delay);
}
}
}
}
lastts = ust;
lastmsc = msc;
/* adjustments if we are still seeing odd skips */
const uint64_t lastWMEvent = atomic_load(&x11.lastWMEvent);
const uint64_t eventDelta = ust > lastWMEvent ? ust - lastWMEvent : 0;
if (skipCount > 0 && ust - lastSkipTime > 1000000UL)
skipCount = 0;
if (delay > 0 && deltamsc > 1 && eventDelta > 1000000UL)
{
/* only adjust if the last skip was less then 1s ago */
const bool flag = ust - lastSkipTime < 1000000UL;
lastSkipTime = ust;
if (flag && ++skipCount > 10)
{
if (delay - 500 < delay)
{
delay -= 500;
DEBUG_INFO("Excessing skipping detected, reduced calibration delay to %lu us", delay);
skipCount = 0;
}
else
{
delay = 0;
DEBUG_WARN("Excessive skipping detected, calibration delay disabled");
}
}
}
if (delay)
{
struct timespec ts = { .tv_nsec = delay * 1000 };
while(nanosleep(&ts, &ts)) {};
}
/* force rendering until we have finished calibration so we can take into
* account how long it takes for the scene to render */
if (calibrate < CALIBRATION_COUNT)
result |= LG_DS_WAIT_FRAME_FORCE_RENDER;
return result;
}
static void x11StopWaitFrame(void)
{
x11SignalFrame(LG_DS_WAIT_FRAME_INTERRUPTED);
}
static void x11GuestPointerUpdated(double x, double y, double localX, double localY)
{
if (app_isCaptureMode() || !x11.entered)
return;
// avoid running too often
static uint64_t last_warp = 0;
uint64_t now = microtime();
if (now - last_warp < 10000)
return;
last_warp = now;
XIWarpPointer(
x11.display,
x11.pointerDev,
None,
x11.window,
0, 0, 0, 0,
localX, localY);
XSync(x11.display, False);
}
static void x11SetPointer(LG_DSPointer pointer)
{
XDefineCursor(x11.display, x11.window, x11.cursors[pointer]);
}
static void x11PrintGrabError(const char * type, int dev, Status ret)
{
const char * errStr;
switch(ret)
{
case AlreadyGrabbed : errStr = "AlreadyGrabbed" ; break;
case GrabNotViewable: errStr = "GrabNotViewable"; break;
case GrabFrozen : errStr = "GrabFrozen" ; break;
case GrabInvalidTime: errStr = "GrabInvalidTime"; break;
default:
errStr = "Unknown";
break;
}
DEBUG_ERROR("XIGrabDevice failed for %s dev %d with 0x%x (%s)",
type, dev, ret, errStr);
}
static bool x11GrabPointerLocked(void)
{
if (atomic_load_explicit(&x11.pointerGrabbed, memory_order_acquire))
return true;
unsigned char mask_bits[XIMaskLen(XI_LASTEVENT)] = { 0 };
XIEventMask mask = {
x11.pointerDev,
sizeof(mask_bits),
mask_bits
};
XISetMask(mask.mask, XI_RawButtonPress );
XISetMask(mask.mask, XI_RawButtonRelease);
XISetMask(mask.mask, XI_RawMotion );
XISetMask(mask.mask, XI_Motion );
XISetMask(mask.mask, XI_Enter );
XISetMask(mask.mask, XI_Leave );
Status ret;
for(int retry = 0; retry < 10; ++retry)
{
ret = XIGrabDevice(
x11.display,
x11.pointerDev,
x11.window,
CurrentTime,
None,
XIGrabModeAsync,
XIGrabModeAsync,
XINoOwnerEvents,
&mask);
// on some WMs (i3) for an unknown reason the first grab attempt when
// switching to a desktop that has LG on it fails with GrabFrozen, however
// adding as short delay seems to resolve the issue.
if (ret == GrabFrozen && retry < 9)
{
usleep(100000);
continue;
}
break;
}
if (ret != Success)
{
x11PrintGrabError("pointer", x11.pointerDev, ret);
return false;
}
atomic_store_explicit(&x11.pointerGrabbed, true, memory_order_release);
return true;
}
static void x11GrabPointer(void)
{
LG_LOCK(x11.pointerLock);
x11GrabPointerLocked();
LG_UNLOCK(x11.pointerLock);
}
static void x11UngrabPointerLocked(void)
{
if (!atomic_load_explicit(&x11.pointerGrabbed, memory_order_acquire))
{
app_handleGrabEvent(false);
return;
}
XIUngrabDevice(x11.display, x11.pointerDev, CurrentTime);
XSync(x11.display, False);
atomic_store_explicit(&x11.pointerGrabbed, false, memory_order_release);
app_handleGrabEvent(false);
}
static void x11UngrabPointer(void)
{
LG_LOCK(x11.pointerLock);
atomic_store_explicit(&x11.captureActive, false, memory_order_release);
x11UngrabPointerLocked();
LG_UNLOCK(x11.pointerLock);
}
static bool x11IsPointerGrabbed(void)
{
return atomic_load_explicit(&x11.pointerGrabbed, memory_order_acquire);
}
static void x11CapturePointer(void)
{
LG_LOCK(x11.pointerLock);
const bool active = x11GrabPointerLocked();
atomic_store_explicit(&x11.captureActive, active, memory_order_release);
LG_UNLOCK(x11.pointerLock);
}
static void x11UncapturePointer(void)
{
const bool ungrab = !app_isFormatValid() || app_isCaptureOnlyMode();
LG_LOCK(x11.pointerLock);
atomic_store_explicit(&x11.captureActive, false, memory_order_release);
/* we need to ungrab the pointer on the following conditions when exiting capture mode:
* - if the format is invalid as we do not know where the guest cursor is,
* which breaks edge detection as the cursor can not be warped out of the
* window when we release it.
* - if the user has opted to use captureInputOnly mode.
*/
if (ungrab)
x11UngrabPointerLocked();
LG_UNLOCK(x11.pointerLock);
}
static bool x11IsPointerCaptured(void)
{
return atomic_load_explicit(&x11.captureActive, memory_order_acquire);
}
static void x11GrabKeyboard(void)
{
if (x11.keyboardGrabbed)
return;
unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
XIEventMask mask = {
x11.keyboardDev,
sizeof(mask_bits),
mask_bits
};
XISetMask(mask.mask, XI_RawKeyPress );
XISetMask(mask.mask, XI_RawKeyRelease);
Status ret = XIGrabDevice(
x11.display,
x11.keyboardDev,
x11.window,
CurrentTime,
None,
XIGrabModeAsync,
XIGrabModeAsync,
XINoOwnerEvents,
&mask);
if (ret != Success)
{
x11PrintGrabError("keyboard", x11.keyboardDev, ret);
return;
}
x11.keyboardGrabbed = true;
}
static void x11UngrabKeyboard(void)
{
if (!x11.keyboardGrabbed)
return;
XIUngrabDevice(x11.display, x11.keyboardDev, CurrentTime);
XSync(x11.display, False);
x11.keyboardGrabbed = false;
}
static void x11WarpPointer(int x, int y, bool exiting)
{
XIWarpPointer(
x11.display,
x11.pointerDev,
None,
x11.window,
0, 0, 0, 0,
x, y);
XSync(x11.display, False);
}
static void x11RealignPointer(void)
{
app_handleMouseRelative(0.0, 0.0, 0.0, 0.0);
}
static bool x11IsValidPointerPos(int x, int y)
{
int screens;
XineramaScreenInfo *xinerama = XineramaQueryScreens(x11.display, &screens);
if(!xinerama)
return true;
bool ret = false;
for(int i = 0; i < screens; ++i)
if (x >= xinerama[i].x_org && x < xinerama[i].x_org + xinerama[i].width &&
y >= xinerama[i].y_org && y < xinerama[i].y_org + xinerama[i].height)
{
ret = true;
break;
}
XFree(xinerama);
return ret;
}
static void x11RequestActivation(void)
{
XEvent e =
{
.xclient = {
.type = ClientMessage,
.send_event = true,
.message_type = x11atoms._NET_WM_STATE,
.format = 32,
.window = x11.window,
.data.l = {
_NET_WM_STATE_ADD,
x11atoms._NET_WM_STATE_DEMANDS_ATTENTION,
0
}
}
};
XSendEvent(x11.display, DefaultRootWindow(x11.display), False,
SubstructureNotifyMask | SubstructureRedirectMask, &e);
}
static void x11InhibitIdle(void)
{
XScreenSaverSuspend(x11.display, true);
}
static void x11UninhibitIdle(void)
{
XScreenSaverSuspend(x11.display, false);
}
static void x11Wait(unsigned int time)
{
usleep(time * 1000U);
}
static void x11SetWindowSize(int w, int h)
{
XResizeWindow(x11.display, x11.window, w, h);
}
static void x11SetFullscreen(bool fs)
{
if (x11.fullscreen == fs)
return;
x11.wm->setFullscreen(fs);
}
static bool x11GetFullscreen(void)
{
return x11.fullscreen;
}
static void x11Minimize(void)
{
XIconifyWindow(x11.display, x11.window, XDefaultScreen(x11.display));
}
struct LG_DisplayServerOps LGDS_X11 =
{
.name = "X11",
.setup = x11Setup,
.probe = x11Probe,
.earlyInit = x11EarlyInit,
.init = x11Init,
.startup = x11Startup,
.shutdown = x11Shutdown,
.free = x11Free,
.getProp = x11GetProp,
#ifdef ENABLE_EGL
.getEGLDisplay = x11GetEGLDisplay,
.getEGLNativeWindow = x11GetEGLNativeWindow,
.eglSwapBuffers = x11EGLSwapBuffers,
#endif
#ifdef ENABLE_OPENGL
.glCreateContext = x11GLCreateContext,
.glDeleteContext = x11GLDeleteContext,
.glMakeCurrent = x11GLMakeCurrent,
.glSetSwapInterval = x11GLSetSwapInterval,
.glSwapBuffers = x11GLSwapBuffers,
#endif
.waitFrame = x11WaitFrame,
.stopWaitFrame = x11StopWaitFrame,
.getFramePeriod = x11GetFramePeriod,
.guestPointerUpdated = x11GuestPointerUpdated,
.setPointer = x11SetPointer,
.grabPointer = x11GrabPointer,
.ungrabPointer = x11UngrabPointer,
.isPointerGrabbed = x11IsPointerGrabbed,
.capturePointer = x11CapturePointer,
.uncapturePointer = x11UncapturePointer,
.isPointerCaptured = x11IsPointerCaptured,
.getKeyLabel = x11GetKeyLabel,
.grabKeyboard = x11GrabKeyboard,
.ungrabKeyboard = x11UngrabKeyboard,
.warpPointer = x11WarpPointer,
.realignPointer = x11RealignPointer,
.isValidPointerPos = x11IsValidPointerPos,
.requestActivation = x11RequestActivation,
.inhibitIdle = x11InhibitIdle,
.uninhibitIdle = x11UninhibitIdle,
.wait = x11Wait,
.setWindowSize = x11SetWindowSize,
.setFullscreen = x11SetFullscreen,
.getFullscreen = x11GetFullscreen,
.minimize = x11Minimize,
.cbInit = x11CBInit,
.cbNotice = x11CBNotice,
.cbRelease = x11CBRelease,
.cbRequest = x11CBRequest
};
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