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LookingGlass/client/displayservers/X11/x11.c
Geoffrey McRae 952ebea2c5 [all] refresh copyright dates
2022-01-05 19:42:46 +11:00

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/**
* Looking Glass
* Copyright © 2017-2022 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 <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/Xcursor/Xcursor.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/debug.h"
#include "common/time.h"
#include "common/event.h"
#include "util.h"
#define _NET_WM_STATE_REMOVE 0
#define _NET_WM_STATE_ADD 1
#define _NET_WM_STATE_TOGGLE 2
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)
};
// forwards
static void x11SetFullscreen(bool fs);
static int x11EventThread(void * unused);
static void x11XInputEvent(XGenericEventCookie *cookie);
static void x11XPresentEvent(XGenericEventCookie *cookie);
static void x11GrabPointer(void);
static void 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;
}
static bool first = true;
static uint64_t lastMsc = 0;
uint64_t refill;
if (!first)
{
const uint64_t delta = (lastMsc >= msc) ?
lastMsc - msc :
~0ULL - msc + lastMsc;
if (delta > 50)
return;
refill = 50 - delta;
}
else
{
refill = 50;
first = false;
lastMsc = msc;
}
if (refill < 25)
return;
for(int 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
);
}
}
static void x11Setup(void)
{
}
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)
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)
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)
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)
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-complient window manager detected: %s", wmName);
x11.ewmhSupport = true;
XFree(wmName);
out_supported:
XFree(supported);
out_child:
XFree(windowFromChild);
out_root:
XFree(windowFromRoot);
out:
return;
}
static bool x11Init(const LG_DSInitParams params)
{
XIDeviceInfo *devinfo;
int count;
int event, error;
memset(&x11, 0, sizeof(x11));
x11.xValuator = -1;
x11.yValuator = -1;
x11.display = XOpenDisplay(NULL);
x11.jitRender = params.jitRender;
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("looking-glass-client")
};
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 (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
);
}
Atom wmState[3] = {0};
int wmStateCount = 0;
if (params.fullscreen)
{
x11.fullscreen = true;
wmState[wmStateCount++] = x11atoms._NET_WM_STATE_FULLSCREEN;
}
if (params.maximize)
{
wmState[wmStateCount++] = x11atoms._NET_WM_STATE_MAXIMIZED_HORZ;
wmState[wmStateCount++] = x11atoms._NET_WM_STATE_MAXIMIZED_VERT;
}
if (wmStateCount)
{
XChangeProperty(
x11.display,
x11.window,
x11atoms._NET_WM_STATE,
XA_ATOM,
32,
PropModeReplace,
(unsigned char *)&wmState,
wmStateCount
);
}
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");
return false;
}
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;
}
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;
if (!x11.ewmhHasFocusEvent)
{
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
);
/* 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);
}
/* create the square cursor */
{
static char data[] = { 0x07, 0x05, 0x07 };
static char mask[] = { 0xff, 0xff, 0xff };
Colormap cmap = DefaultColormap(x11.display, DefaultScreen(x11.display));
XColor colors[2] =
{
{ .pixel = BlackPixelOfScreen(DefaultScreenOfDisplay(x11.display)) },
{ .pixel = WhitePixelOfScreen(DefaultScreenOfDisplay(x11.display)) }
};
XQueryColors(x11.display, cmap, colors, 2);
Pixmap img = XCreateBitmapFromData(x11.display, x11.window, data, 3, 3);
Pixmap msk = XCreateBitmapFromData(x11.display, x11.window, mask, 3, 3);
x11.cursors[LG_POINTER_SQUARE] = XCreatePixmapCursor(x11.display, img, msk,
&colors[0], &colors[1], 1, 1);
XFreePixmap(x11.display, img);
XFreePixmap(x11.display, msk);
}
/* 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]);
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);
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)
lgSignalEvent(x11.frameEvent);
}
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]);
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);
// 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;
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;
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 x11XInputEvent(XGenericEventCookie *cookie)
{
static int button_state = 0;
switch(cookie->evtype)
{
case XI_FocusIn:
{
if (x11.ewmhHasFocusEvent)
return;
atomic_store(&x11.lastWMEvent, microtime());
if (x11.focused)
return;
XIFocusOutEvent *xie = cookie->data;
if (xie->mode != XINotifyNormal &&
xie->mode != XINotifyWhileGrabbed &&
xie->mode != XINotifyUngrab)
return;
x11.focused = true;
app_updateCursorPos(xie->event_x, xie->event_y);
app_handleFocusEvent(true);
return;
}
case XI_FocusOut:
{
if (x11.ewmhHasFocusEvent)
return;
atomic_store(&x11.lastWMEvent, microtime());
if (!x11.focused)
return;
XIFocusOutEvent *xie = cookie->data;
if (xie->mode != XINotifyNormal &&
xie->mode != XINotifyWhileGrabbed &&
xie->mode != XINotifyGrab)
return;
app_updateCursorPos(xie->event_x, xie->event_y);
app_handleFocusEvent(false);
x11.focused = false;
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;
return;
}
case XI_KeyPress:
{
if (!x11.focused || x11.keyboardGrabbed)
return;
XIDeviceEvent *device = cookie->data;
app_handleKeyPress(device->detail - 8);
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 - 8);
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 - 8);
return;
}
case XI_RawKeyRelease:
{
if (!x11.focused)
return;
XIRawEvent *raw = cookie->data;
app_handleKeyRelease(raw->detail - 8);
return;
}
case XI_ButtonPress:
{
if (!x11.focused || !x11.entered)
return;
XIDeviceEvent *device = cookie->data;
if (device->detail == 4)
app_handleWheelMotion(-0.5);
else if (device->detail == 5)
app_handleWheelMotion(0.5);
else
app_handleButtonPress(
device->detail > 5 ? device->detail - 2 : device->detail);
return;
}
case XI_ButtonRelease:
{
if (!x11.focused || !x11.entered)
return;
XIDeviceEvent *device = cookie->data;
app_handleButtonRelease(device->detail);
return;
}
case XI_RawButtonPress:
{
if (!x11.focused || !x11.entered)
return;
XIRawEvent *raw = cookie->data;
/* 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 |= (1 << raw->detail);
app_handleButtonPress(
raw->detail > 5 ? raw->detail - 2 : raw->detail);
return;
}
case XI_RawButtonRelease:
{
if (!x11.focused || !x11.entered)
return;
XIRawEvent *raw = cookie->data;
/* 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 &= ~(1 << raw->detail);
app_handleButtonRelease(
raw->detail > 5 ? raw->detail - 2 : raw->detail);
return;
}
case XI_Motion:
{
XIDeviceEvent *device = cookie->data;
app_updateCursorPos(device->event_x, device->event_y);
if (!x11.pointerGrabbed)
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;
x11DoPresent(e->msc);
atomic_store(&x11.presentMsc, e->msc);
atomic_store(&x11.presentUst, e->ust);
lgSignalEvent(x11.frameEvent);
break;
}
}
}
#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 void x11EGLSwapBuffers(EGLDisplay display, EGLSurface surface,
const struct Rect * damage, int count)
{
static struct SwapWithDamageData data = {0};
if (!data.init)
swapWithDamageInit(&data, display);
swapWithDamage(&data, display, surface, damage, count);
}
#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 bool x11WaitFrame(void)
{
/* wait until we are woken up by the present event */
lgWaitEvent(x11.frameEvent, TIMEOUT_INFINITE);
#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);
static bool warmup = true;
if (warmup)
{
static uint64_t expire = 0;
if (!expire)
{
DEBUG_INFO("Warming up...");
expire = ust + WARMUP_TIME;
}
if (ust < expire)
return false;
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;
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;
static int skipCount = 0;
static uint64_t lastSkipTime = 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)
return true;
return false;
}
static void x11StopWaitFrame(void)
{
lgSignalEvent(x11.frameEvent);
}
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 void x11GrabPointer(void)
{
if (x11.pointerGrabbed)
return;
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;
}
x11.pointerGrabbed = true;
}
static void x11UngrabPointer(void)
{
if (!x11.pointerGrabbed)
return;
XIUngrabDevice(x11.display, x11.pointerDev, CurrentTime);
XSync(x11.display, False);
x11.pointerGrabbed = false;
}
static void x11CapturePointer(void)
{
x11GrabPointer();
}
static void x11UncapturePointer(void)
{
/* 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 (!app_isFormatValid() || app_isCaptureOnlyMode())
x11UngrabPointer();
}
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 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;
XEvent e =
{
.xclient = {
.type = ClientMessage,
.send_event = true,
.message_type = x11atoms._NET_WM_STATE,
.format = 32,
.window = x11.window,
.data.l = {
fs ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE,
x11atoms._NET_WM_STATE_FULLSCREEN,
0
}
}
};
XSendEvent(x11.display, DefaultRootWindow(x11.display), False,
SubstructureNotifyMask | SubstructureRedirectMask, &e);
}
static bool x11GetFullscreen(void)
{
return x11.fullscreen;
}
static void x11Minimize(void)
{
XIconifyWindow(x11.display, x11.window, XDefaultScreen(x11.display));
}
struct LG_DisplayServerOps LGDS_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,
.guestPointerUpdated = x11GuestPointerUpdated,
.setPointer = x11SetPointer,
.grabPointer = x11GrabPointer,
.ungrabPointer = x11UngrabPointer,
.capturePointer = x11CapturePointer,
.uncapturePointer = x11UncapturePointer,
.grabKeyboard = x11GrabKeyboard,
.ungrabKeyboard = x11UngrabKeyboard,
.warpPointer = x11WarpPointer,
.realignPointer = x11RealignPointer,
.isValidPointerPos = x11IsValidPointerPos,
.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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