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LookingGlass/client/displayservers/X11/x11.c
Geoffrey McRae 1fd726eed7 [client] x11: be less sensitive to frame skips 
External events like launching other applications can cause latency
spikes while X11 initializes the application, we should only start
adjusting our delay if we see excessive skips over a 1s period.
2021-08-09 15:51:01 +10:00

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/**
* Looking Glass
* Copyright © 2017-2021 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 <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 x11DoPresent(void)
{
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 msc = atomic_load(&x11.presentMsc);
uint64_t refill;
if (!first)
refill = 50 - (lastMsc - msc);
else
{
refill = 50;
first = false;
lastMsc = msc;
}
if (refill < 25)
return;
if (refill == 0)
lastMsc = msc;
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 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);
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;
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 (!lgCreateThread("X11EventThread", x11EventThread, NULL, &x11.eventThread))
{
DEBUG_ERROR("Failed to create the x11 event thread");
goto fail_window;
}
if (x11.jitRender)
x11DoPresent();
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)
{
close(epollfd);
DEBUG_ERROR("epoll_wait failure");
return 0;
}
if (nfds == 0)
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;
for(int i = 0; i < num; ++i)
{
Atom prop = ((Atom *)data)[i];
if (prop == x11atoms._NET_WM_STATE_FULLSCREEN)
fullscreen = true;
}
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 void x11XInputEvent(XGenericEventCookie *cookie)
{
static int button_state = 0;
switch(cookie->evtype)
{
case XI_FocusIn:
{
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:
{
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)
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())
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);
return;
}
case XI_KeyRelease:
{
if (!x11.focused || x11.keyboardGrabbed)
return;
XIDeviceEvent *device = cookie->data;
app_handleKeyRelease(device->detail - 8);
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;
atomic_store(&x11.presentMsc, e->msc);
atomic_store(&x11.presentUst, e->ust);
lgSignalEvent(x11.frameEvent);
x11DoPresent();
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)
{
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 deltats = 0;
uint64_t deltamsc = 0;
if (lastts)
{
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 = XIGrabDevice(
x11.display,
x11.pointerDev,
x11.window,
CurrentTime,
None,
XIGrabModeAsync,
XIGrabModeAsync,
XINoOwnerEvents,
&mask);
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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