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picom/src/compton.c
Yuxuan Shui 709065d531
Destroy Input Only window properly 
Destruction of Input Only windows is erroneously ignored by commit
cea010a, causing future window with the same window id as the destroyed
Input Only window to be treated by an Input Only window even when they
are not. The end result is that some windows don't show up.

Also improved the comments in win.c.

Fixes #119

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
2019-02-20 01:11:13 +00:00

2993 lines
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// SPDX-License-Identifier: MIT
/*
* Compton - a compositor for X11
*
* Based on `xcompmgr` - Copyright (c) 2003, Keith Packard
*
* Copyright (c) 2011-2013, Christopher Jeffrey
* See LICENSE-mit for more information.
*
*/
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xlib-xcb.h>
#include <X11/Xlibint.h>
#include <X11/extensions/sync.h>
#include <xcb/randr.h>
#include <xcb/present.h>
#include <xcb/damage.h>
#include <xcb/render.h>
#include <xcb/xfixes.h>
#include <xcb/sync.h>
#include <xcb/composite.h>
#include <ev.h>
#include "err.h"
#include "kernel.h"
#include "common.h"
#include "compiler.h"
#include "compton.h"
#ifdef CONFIG_OPENGL
#include "opengl.h"
#endif
#include "win.h"
#include "x.h"
#include "config.h"
#include "diagnostic.h"
#include "render.h"
#include "utils.h"
#include "region.h"
#include "types.h"
#include "c2.h"
#include "log.h"
#ifdef CONFIG_DBUS
#include "dbus.h"
#endif
#include "options.h"
#define CASESTRRET(s) case s: return #s
/// Get session_t pointer from a pointer to a member of session_t
#define session_ptr(ptr, member) ({ \
const __typeof__( ((session_t *)0)->member ) *__mptr = (ptr); \
(session_t *)((char *)__mptr - offsetof(session_t, member)); \
})
static void
update_refresh_rate(session_t *ps);
static bool
swopti_init(session_t *ps);
static void
cxinerama_upd_scrs(session_t *ps);
static void
session_destroy(session_t *ps);
static void
cxinerama_upd_scrs(session_t *ps);
static void
redir_start(session_t *ps);
static void
redir_stop(session_t *ps);
static win *
recheck_focus(session_t *ps);
static void
restack_win(session_t *ps, win *w, xcb_window_t new_above);
static void
update_ewmh_active_win(session_t *ps);
static void
draw_callback(EV_P_ ev_idle *w, int revents);
// === Global constants ===
/// Name strings for window types.
const char * const WINTYPES[NUM_WINTYPES] = {
"unknown",
"desktop",
"dock",
"toolbar",
"menu",
"utility",
"splash",
"dialog",
"normal",
"dropdown_menu",
"popup_menu",
"tooltip",
"notify",
"combo",
"dnd",
};
/// Names of VSync modes.
const char * const VSYNC_STRS[NUM_VSYNC + 1] = {
"none", // VSYNC_NONE
"drm", // VSYNC_DRM
"opengl", // VSYNC_OPENGL
"opengl-oml", // VSYNC_OPENGL_OML
"opengl-swc", // VSYNC_OPENGL_SWC
"opengl-mswc", // VSYNC_OPENGL_MSWC
NULL
};
/// Names of backends.
const char * const BACKEND_STRS[NUM_BKEND + 1] = {
"xrender", // BKEND_XRENDER
"glx", // BKEND_GLX
"xr_glx_hybrid",// BKEND_XR_GLX_HYBRID
NULL
};
// === Global variables ===
/// Pointer to current session, as a global variable. Only used by
/// xerror(), which could not have a pointer to current session passed in.
/// XXX Limit what xerror can access by not having this pointer
session_t *ps_g = NULL;
/**
* Free Xinerama screen info.
*
* XXX consider moving to x.c
*/
static inline void
free_xinerama_info(session_t *ps) {
if (ps->xinerama_scr_regs) {
for (int i = 0; i < ps->xinerama_nscrs; ++i)
pixman_region32_fini(&ps->xinerama_scr_regs[i]);
free(ps->xinerama_scr_regs);
}
cxfree(ps->xinerama_scrs);
ps->xinerama_scrs = NULL;
ps->xinerama_nscrs = 0;
}
/**
* Get current system clock in milliseconds.
*/
static inline unsigned long
get_time_ms(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec % SEC_WRAP * 1000 + tv.tv_usec / 1000;
}
// XXX Move to x.c
static void
cxinerama_upd_scrs(session_t *ps) {
// XXX Consider deprecating Xinerama, switch to RandR when necessary
free_xinerama_info(ps);
if (!ps->o.xinerama_shadow_crop || !ps->xinerama_exists) return;
xcb_xinerama_is_active_reply_t *active =
xcb_xinerama_is_active_reply(ps->c,
xcb_xinerama_is_active(ps->c), NULL);
if (!active || !active->state) {
free(active);
return;
}
free(active);
ps->xinerama_scrs = xcb_xinerama_query_screens_reply(ps->c,
xcb_xinerama_query_screens(ps->c), NULL);
if (!ps->xinerama_scrs)
return;
xcb_xinerama_screen_info_t *scrs = xcb_xinerama_query_screens_screen_info(ps->xinerama_scrs);
ps->xinerama_nscrs = xcb_xinerama_query_screens_screen_info_length(ps->xinerama_scrs);
ps->xinerama_scr_regs = ccalloc(ps->xinerama_nscrs, region_t);
for (int i = 0; i < ps->xinerama_nscrs; ++i) {
const xcb_xinerama_screen_info_t * const s = &scrs[i];
pixman_region32_init_rect(&ps->xinerama_scr_regs[i], s->x_org, s->y_org, s->width, s->height);
}
}
/**
* Find matched window.
*
* XXX move to win.c
*/
static inline win *
find_win_all(session_t *ps, const xcb_window_t wid) {
if (!wid || PointerRoot == wid || wid == ps->root || wid == ps->overlay)
return NULL;
win *w = find_win(ps, wid);
if (!w) w = find_toplevel(ps, wid);
if (!w) w = find_toplevel2(ps, wid);
return w;
}
void queue_redraw(session_t *ps) {
// If --benchmark is used, redraw is always queued
if (!ps->redraw_needed && !ps->o.benchmark)
ev_idle_start(ps->loop, &ps->draw_idle);
ps->redraw_needed = true;
}
/**
* Get a region of the screen size.
*/
static inline void
get_screen_region(session_t *ps, region_t *res) {
pixman_box32_t b = {
.x1 = 0, .y1 = 0,
.x2 = ps->root_width,
.y2 = ps->root_height
};
pixman_region32_fini(res);
pixman_region32_init_rects(res, &b, 1);
}
void add_damage(session_t *ps, const region_t *damage) {
// Ignore damage when screen isn't redirected
if (!ps->redirected)
return;
if (!damage)
return;
pixman_region32_union(ps->damage, ps->damage, (region_t *)damage);
}
// === Fading ===
/**
* Get the time left before next fading point.
*
* In milliseconds.
*/
static double
fade_timeout(session_t *ps) {
auto now = get_time_ms();
if (ps->o.fade_delta + ps->fade_time < now)
return 0;
int diff = ps->o.fade_delta + ps->fade_time - now;
diff = normalize_i_range(diff, 0, ps->o.fade_delta * 2);
return diff / 1000.0;
}
/**
* Run fading on a window.
*
* @param steps steps of fading
* @return whether we are still in fading mode
*/
static bool
run_fade(session_t *ps, win **_w, unsigned steps) {
win *w = *_w;
if (w->state == WSTATE_MAPPED || w->state == WSTATE_UNMAPPED) {
// We are not fading
assert(w->opacity_tgt == w->opacity);
return false;
}
if (!win_should_fade(ps, w)) {
log_debug("Window %#010x %s doesn't need fading", w->id, w->name);
w->opacity = w->opacity_tgt;
}
if (w->opacity == w->opacity_tgt) {
// We have reached target opacity, wrapping up.
// Note, we reach here after we have rendered the window with the target
// opacity at least once. If the window is destroyed because it is faded out,
// there is no need to add damage here.
log_debug("Fading finished for window %#010x %s", w->id, w->name);
win_check_fade_finished(ps, _w);
return false;
}
if (steps) {
if (w->opacity < w->opacity_tgt) {
w->opacity = normalize_d_range(
w->opacity + ps->o.fade_in_step * steps,
0.0, w->opacity_tgt);
} else {
w->opacity = normalize_d_range(
w->opacity - ps->o.fade_out_step * steps,
w->opacity_tgt, 1);
}
}
// Note even if opacity == opacity_tgt, we still want to run preprocess one last
// time to finish state transition. So return true in that case too.
return true;
}
// === Error handling ===
static void
discard_ignore(session_t *ps, unsigned long sequence) {
while (ps->ignore_head) {
if (sequence > ps->ignore_head->sequence) {
ignore_t *next = ps->ignore_head->next;
free(ps->ignore_head);
ps->ignore_head = next;
if (!ps->ignore_head) {
ps->ignore_tail = &ps->ignore_head;
}
} else {
break;
}
}
}
static int
should_ignore(session_t *ps, unsigned long sequence) {
discard_ignore(ps, sequence);
return ps->ignore_head && ps->ignore_head->sequence == sequence;
}
// === Windows ===
/**
* Determine the event mask for a window.
*/
long determine_evmask(session_t *ps, xcb_window_t wid, win_evmode_t mode) {
long evmask = 0;
win *w = NULL;
// Check if it's a mapped frame window
if (WIN_EVMODE_FRAME == mode
|| ((w = find_win(ps, wid)) && w->a.map_state == XCB_MAP_STATE_VIEWABLE)) {
evmask |= XCB_EVENT_MASK_PROPERTY_CHANGE;
if (ps->o.track_focus && !ps->o.use_ewmh_active_win)
evmask |= XCB_EVENT_MASK_FOCUS_CHANGE;
}
// Check if it's a mapped client window
if (WIN_EVMODE_CLIENT == mode
|| ((w = find_toplevel(ps, wid)) && w->a.map_state == XCB_MAP_STATE_VIEWABLE)) {
if (ps->o.frame_opacity || ps->o.track_wdata || ps->track_atom_lst
|| ps->o.detect_client_opacity)
evmask |= XCB_EVENT_MASK_PROPERTY_CHANGE;
}
return evmask;
}
/**
* Find out the WM frame of a client window by querying X.
*
* @param ps current session
* @param wid window ID
* @return struct _win object of the found window, NULL if not found
*/
win *find_toplevel2(session_t *ps, xcb_window_t wid) {
// TODO this should probably be an "update tree", then find_toplevel.
// current approach is a bit more "racy"
win *w = NULL;
// We traverse through its ancestors to find out the frame
while (wid && wid != ps->root && !(w = find_win(ps, wid))) {
xcb_query_tree_reply_t *reply;
// xcb_query_tree probably fails if you run compton when X is somehow
// initializing (like add it in .xinitrc). In this case
// just leave it alone.
reply = xcb_query_tree_reply(ps->c, xcb_query_tree(ps->c, wid), NULL);
if (reply == NULL) {
break;
}
wid = reply->parent;
free(reply);
}
return w;
}
/**
* Recheck currently focused window and set its <code>w->focused</code>
* to true.
*
* @param ps current session
* @return struct _win of currently focused window, NULL if not found
*/
static win *
recheck_focus(session_t *ps) {
// Use EWMH _NET_ACTIVE_WINDOW if enabled
if (ps->o.use_ewmh_active_win) {
update_ewmh_active_win(ps);
return ps->active_win;
}
// Determine the currently focused window so we can apply appropriate
// opacity on it
xcb_window_t wid = XCB_NONE;
xcb_get_input_focus_reply_t *reply =
xcb_get_input_focus_reply(ps->c, xcb_get_input_focus(ps->c), NULL);
if (reply) {
wid = reply->focus;
free(reply);
}
win *w = find_win_all(ps, wid);
log_trace("%#010" PRIx32 " (%#010lx \"%s\") focused.", wid,
(w ? w->id: XCB_NONE), (w ? w->name: NULL));
// And we set the focus state here
if (w) {
win_set_focused(ps, w, true);
return w;
}
return NULL;
}
/**
* Look for the client window of a particular window.
*/
xcb_window_t
find_client_win(session_t *ps, xcb_window_t w) {
if (wid_has_prop(ps, w, ps->atom_client)) {
return w;
}
xcb_query_tree_reply_t *reply = xcb_query_tree_reply(ps->c,
xcb_query_tree(ps->c, w), NULL);
if (!reply)
return 0;
xcb_window_t *children = xcb_query_tree_children(reply);
int nchildren = xcb_query_tree_children_length(reply);
int i;
xcb_window_t ret = 0;
for (i = 0; i < nchildren; ++i) {
if ((ret = find_client_win(ps, children[i])))
break;
}
free(reply);
return ret;
}
static win *
paint_preprocess(session_t *ps, win *list, bool *fade_running) {
// XXX need better, more general name for `fade_running`. It really
// means if fade is still ongoing after the current frame is rendered
win *t = NULL, *next = NULL;
*fade_running = false;
// Fading step calculation
unsigned long steps = 0L;
auto now = get_time_ms();
auto tolerance = FADE_DELTA_TOLERANCE*ps->o.fade_delta;
if (ps->fade_time && now+tolerance >= ps->fade_time) {
steps = (now - ps->fade_time + tolerance) / ps->o.fade_delta;
} else {
// Reset fade_time if unset, or there appears to be a time disorder
ps->fade_time = get_time_ms();
steps = 0L;
}
ps->fade_time += steps * ps->o.fade_delta;
// First, let's process fading
for (win *w = list; w; w = next) {
next = w->next;
const winmode_t mode_old = w->mode;
const bool was_painted = w->to_paint;
const opacity_t opacity_old = w->opacity;
if (win_should_dim(ps, w) != w->dim) {
w->dim = win_should_dim(ps, w);
add_damage_from_win(ps, w);
}
// Run fading
if (run_fade(ps, &w, steps)) {
*fade_running = true;
}
if (!w) {
// the window might have been destroyed because fading finished
continue;
}
if (win_has_frame(w)) {
w->frame_opacity = ps->o.frame_opacity;
} else {
w->frame_opacity = 1.0;
}
// Update window mode
win_determine_mode(ps, w);
// Destroy all reg_ignore above when frame opaque state changes on
// SOLID mode
if (was_painted && w->mode != mode_old) {
w->reg_ignore_valid = false;
}
// Add window to damaged area if its opacity changes
// If was_painted == false, and to_paint is also false, we don't care
// If was_painted == false, but to_paint is true, damage will be added in the loop below
if (was_painted && w->opacity != opacity_old) {
add_damage_from_win(ps, w);
}
}
// Opacity will not change, from now on.
rc_region_t *last_reg_ignore = rc_region_new();
bool unredir_possible = false;
// Trace whether it's the highest window to paint
bool is_highest = true;
bool reg_ignore_valid = true;
for (win *w = list; w; w = next) {
__label__ skip_window;
bool to_paint = true;
// w->to_paint remembers whether this window is painted last time
const bool was_painted = w->to_paint;
// In case calling the fade callback function destroys this window
next = w->next;
// Destroy reg_ignore if some window above us invalidated it
if (!reg_ignore_valid)
rc_region_unref(&w->reg_ignore);
//log_trace("%d %d %s", w->a.map_state, w->ever_damaged, w->name);
// Give up if it's not damaged or invisible, or it's unmapped and its
// pixmap is gone (for example due to a ConfigureNotify), or when it's
// excluded
if (!w->ever_damaged
|| w->g.x + w->g.width < 1 || w->g.y + w->g.height < 1
|| w->g.x >= ps->root_width || w->g.y >= ps->root_height
|| w->state == WSTATE_UNMAPPED
|| (double) w->opacity * MAX_ALPHA < 1
|| w->paint_excluded)
to_paint = false;
//log_trace("%s %d %d %d", w->name, to_paint, w->opacity, w->paint_excluded);
// Add window to damaged area if its painting status changes
// or opacity changes
if (to_paint != was_painted) {
w->reg_ignore_valid = false;
add_damage_from_win(ps, w);
}
// to_paint will never change afterward
if (!to_paint)
goto skip_window;
// Calculate shadow opacity
w->shadow_opacity = ps->o.shadow_opacity * w->opacity * ps->o.frame_opacity;
// Generate ignore region for painting to reduce GPU load
if (!w->reg_ignore)
w->reg_ignore = rc_region_ref(last_reg_ignore);
// If the window is solid, we add the window region to the
// ignored region
// Otherwise last_reg_ignore shouldn't change
if (w->mode == WMODE_SOLID && !ps->o.force_win_blend) {
region_t *tmp = rc_region_new();
if (w->frame_opacity == 1)
*tmp = win_get_bounding_shape_global_by_val(w);
else {
win_get_region_noframe_local(w, tmp);
pixman_region32_intersect(tmp, tmp, &w->bounding_shape);
pixman_region32_translate(tmp, w->g.x, w->g.y);
}
pixman_region32_union(tmp, tmp, last_reg_ignore);
rc_region_unref(&last_reg_ignore);
last_reg_ignore = tmp;
}
// (Un)redirect screen
// We could definitely unredirect the screen when there's no window to
// paint, but this is typically unnecessary, may cause flickering when
// fading is enabled, and could create inconsistency when the wallpaper
// is not correctly set.
if (ps->o.unredir_if_possible && is_highest) {
if (win_is_solid(ps, w)
&& (w->frame_opacity == 1 || !win_has_frame(w))
&& win_is_fullscreen(ps, w)
&& !w->unredir_if_possible_excluded)
unredir_possible = true;
}
// Reset flags
w->flags = 0;
w->prev_trans = t;
t = w;
// If the screen is not redirected and the window has redir_ignore set,
// this window should not cause the screen to become redirected
if (!(ps->o.wintype_option[w->window_type].redir_ignore && !ps->redirected)) {
is_highest = false;
}
skip_window:
reg_ignore_valid = reg_ignore_valid && w->reg_ignore_valid;
w->reg_ignore_valid = true;
win_check_fade_finished(ps, &w);
// Avoid setting w->to_paint if w is freed
if (w) {
w->to_paint = to_paint;
}
}
rc_region_unref(&last_reg_ignore);
// If possible, unredirect all windows and stop painting
if (ps->o.redirected_force != UNSET)
unredir_possible = !ps->o.redirected_force;
else if (ps->o.unredir_if_possible && is_highest && !ps->redirected)
// If there's no window to paint, and the screen isn't redirected,
// don't redirect it.
unredir_possible = true;
if (unredir_possible) {
if (ps->redirected) {
if (!ps->o.unredir_if_possible_delay || ps->tmout_unredir_hit)
redir_stop(ps);
else if (!ev_is_active(&ps->unredir_timer)) {
ev_timer_set(&ps->unredir_timer,
ps->o.unredir_if_possible_delay / 1000.0, 0);
ev_timer_start(ps->loop, &ps->unredir_timer);
}
}
} else {
ev_timer_stop(ps->loop, &ps->unredir_timer);
redir_start(ps);
}
return t;
}
/*
* WORK-IN-PROGRESS!
static void
xr_take_screenshot(session_t *ps) {
XImage *img = XGetImage(ps->dpy, get_tgt_window(ps), 0, 0,
ps->root_width, ps->root_height, AllPlanes, XYPixmap);
if (!img) {
log_error("Failed to get XImage.");
return NULL;
}
assert(0 == img->xoffset);
}
*/
/**
* Rebuild cached <code>screen_reg</code>.
*/
static void
rebuild_screen_reg(session_t *ps) {
get_screen_region(ps, &ps->screen_reg);
}
/**
* Rebuild <code>shadow_exclude_reg</code>.
*/
static void
rebuild_shadow_exclude_reg(session_t *ps) {
bool ret = parse_geometry(ps, ps->o.shadow_exclude_reg_str,
&ps->shadow_exclude_reg);
if (!ret)
exit(1);
}
static void
repair_win(session_t *ps, win *w) {
if (w->a.map_state != XCB_MAP_STATE_VIEWABLE)
return;
region_t parts;
pixman_region32_init(&parts);
if (!w->ever_damaged) {
win_extents(w, &parts);
set_ignore_cookie(ps,
xcb_damage_subtract(ps->c, w->damage, XCB_NONE, XCB_NONE));
} else {
xcb_xfixes_region_t tmp = xcb_generate_id(ps->c);
xcb_xfixes_create_region(ps->c, tmp, 0, NULL);
set_ignore_cookie(ps,
xcb_damage_subtract(ps->c, w->damage, XCB_NONE, tmp));
xcb_xfixes_translate_region(ps->c, tmp,
w->g.x + w->g.border_width,
w->g.y + w->g.border_width);
x_fetch_region(ps->c, tmp, &parts);
xcb_xfixes_destroy_region(ps->c, tmp);
}
w->ever_damaged = true;
w->pixmap_damaged = true;
// Why care about damage when screen is unredirected?
// We will force full-screen repaint on redirection.
if (!ps->redirected) {
pixman_region32_fini(&parts);
return;
}
// Remove the part in the damage area that could be ignored
if (w->reg_ignore && win_is_region_ignore_valid(ps, w))
pixman_region32_subtract(&parts, &parts, w->reg_ignore);
add_damage(ps, &parts);
pixman_region32_fini(&parts);
}
static void
restack_win(session_t *ps, win *w, xcb_window_t new_above) {
xcb_window_t old_above;
if (w->next) {
old_above = w->next->id;
} else {
old_above = XCB_NONE;
}
log_debug("Restack %#010x (%s), old_above: %#010x, new_above: %#010x",
w->id, w->name, old_above, new_above);
if (old_above != new_above) {
w->reg_ignore_valid = false;
rc_region_unref(&w->reg_ignore);
if (w->next) {
w->next->reg_ignore_valid = false;
rc_region_unref(&w->next->reg_ignore);
}
win **prev = NULL, **prev_old = NULL;
bool found = false;
for (prev = &ps->list; *prev; prev = &(*prev)->next) {
if ((*prev)->id == new_above && (*prev)->state != WSTATE_DESTROYING) {
found = true;
break;
}
}
if (new_above && !found) {
log_error("(%#010x, %#010x): Failed to found new above window.", w->id, new_above);
return;
}
for (prev_old = &ps->list; *prev_old; prev_old = &(*prev_old)->next) {
if ((*prev_old) == w) {
break;
}
}
*prev_old = w->next;
w->next = *prev;
*prev = w;
// add damage for this window
add_damage_from_win(ps, w);
#ifdef DEBUG_RESTACK
log_trace("Window stack modified. Current stack:");
for (win *c = ps->list; c; c = c->next) {
const char *desc = "";
if (c->destroying) {
desc = "(D) ";
}
log_trace("%#010x \"%s\" %s", c->id, c->name, desc);
}
#endif
}
}
void
configure_win(session_t *ps, xcb_configure_notify_event_t *ce) {
// On root window changes
if (ce->window == ps->root) {
free_paint(ps, &ps->tgt_buffer);
ps->root_width = ce->width;
ps->root_height = ce->height;
rebuild_screen_reg(ps);
rebuild_shadow_exclude_reg(ps);
for (int i = 0; i < ps->ndamage; i++) {
pixman_region32_clear(&ps->damage_ring[i]);
}
ps->damage = ps->damage_ring + ps->ndamage - 1;
// Re-redirect screen if required
if (ps->o.reredir_on_root_change && ps->redirected) {
redir_stop(ps);
redir_start(ps);
}
// Invalidate reg_ignore from the top
rc_region_unref(&ps->list->reg_ignore);
ps->list->reg_ignore_valid = false;
#ifdef CONFIG_OPENGL
// Reinitialize GLX on root change
if (ps->o.glx_reinit_on_root_change && ps->psglx) {
if (!glx_reinit(ps, bkend_use_glx(ps)))
log_error("Failed to reinitialize GLX, troubles ahead.");
if (BKEND_GLX == ps->o.backend && !glx_init_blur(ps))
log_error("Failed to initialize filters.");
}
// GLX root change callback
if (BKEND_GLX == ps->o.backend)
glx_on_root_change(ps);
#endif
force_repaint(ps);
return;
}
// Non-root window changes
win *w = find_win(ps, ce->window);
region_t damage;
pixman_region32_init(&damage);
if (!w) {
return;
}
if (w->state == WSTATE_UNMAPPED) {
/* save the configure event for when the window maps */
w->need_configure = true;
w->queue_configure = *ce;
restack_win(ps, w, ce->above_sibling);
} else {
if (!w->need_configure) {
restack_win(ps, w, ce->above_sibling);
}
bool factor_change = false;
w->need_configure = false;
win_extents(w, &damage);
// If window geometry change, free old extents
if (w->g.x != ce->x || w->g.y != ce->y
|| w->g.width != ce->width || w->g.height != ce->height
|| w->g.border_width != ce->border_width)
factor_change = true;
w->g.x = ce->x;
w->g.y = ce->y;
if (w->g.width != ce->width || w->g.height != ce->height
|| w->g.border_width != ce->border_width) {
w->g.width = ce->width;
w->g.height = ce->height;
w->g.border_width = ce->border_width;
calc_win_size(ps, w);
win_update_bounding_shape(ps, w);
}
region_t new_extents;
pixman_region32_init(&new_extents);
win_extents(w, &new_extents);
pixman_region32_union(&damage, &damage, &new_extents);
pixman_region32_fini(&new_extents);
if (factor_change) {
win_on_factor_change(ps, w);
add_damage(ps, &damage);
win_update_screen(ps, w);
}
}
pixman_region32_fini(&damage);
// override_redirect flag cannot be changed after window creation, as far
// as I know, so there's no point to re-match windows here.
w->a.override_redirect = ce->override_redirect;
}
static void
circulate_win(session_t *ps, xcb_circulate_notify_event_t *ce) {
win *w = find_win(ps, ce->window);
xcb_window_t new_above;
if (!w) return;
if (ce->place == PlaceOnTop) {
new_above = ps->list->id;
} else {
new_above = XCB_NONE;
}
restack_win(ps, w, new_above);
}
static inline void
root_damaged(session_t *ps) {
if (ps->root_tile_paint.pixmap) {
xcb_clear_area(ps->c, true, ps->root, 0, 0, 0, 0);
free_root_tile(ps);
}
// Mark screen damaged
force_repaint(ps);
}
/**
* Xlib error handler function.
*/
static int
xerror(Display attr_unused *dpy, XErrorEvent *ev) {
if (!should_ignore(ps_g, ev->serial))
x_print_error(ev->serial, ev->request_code, ev->minor_code, ev->error_code);
return 0;
}
/**
* XCB error handler function.
*/
void
ev_xcb_error(session_t *ps, xcb_generic_error_t *err) {
if (!should_ignore(ps, err->sequence))
x_print_error(err->sequence, err->major_code, err->minor_code, err->error_code);
}
static void
expose_root(session_t *ps, const rect_t *rects, int nrects) {
region_t region;
pixman_region32_init_rects(&region, rects, nrects);
add_damage(ps, &region);
}
/**
* Force a full-screen repaint.
*/
void
force_repaint(session_t *ps) {
assert(pixman_region32_not_empty(&ps->screen_reg));
queue_redraw(ps);
add_damage(ps, &ps->screen_reg);
}
#ifdef CONFIG_DBUS
/** @name DBus hooks
*/
///@{
/**
* Set w->shadow_force of a window.
*/
void
win_set_shadow_force(session_t *ps, win *w, switch_t val) {
if (val != w->shadow_force) {
w->shadow_force = val;
win_determine_shadow(ps, w);
queue_redraw(ps);
}
}
/**
* Set w->fade_force of a window.
*
* Doesn't affect fading already in progress
*/
void
win_set_fade_force(session_t *ps, win *w, switch_t val) {
w->fade_force = val;
}
/**
* Set w->focused_force of a window.
*/
void
win_set_focused_force(session_t *ps, win *w, switch_t val) {
if (val != w->focused_force) {
w->focused_force = val;
win_update_focused(ps, w);
queue_redraw(ps);
}
}
/**
* Set w->invert_color_force of a window.
*/
void
win_set_invert_color_force(session_t *ps, win *w, switch_t val) {
if (val != w->invert_color_force) {
w->invert_color_force = val;
win_determine_invert_color(ps, w);
queue_redraw(ps);
}
}
/**
* Enable focus tracking.
*/
void
opts_init_track_focus(session_t *ps) {
// Already tracking focus
if (ps->o.track_focus)
return;
ps->o.track_focus = true;
if (!ps->o.use_ewmh_active_win) {
// Start listening to FocusChange events
for (win *w = ps->list; w; w = w->next)
if (w->a.map_state == XCB_MAP_STATE_VIEWABLE)
xcb_change_window_attributes(ps->c, w->id, XCB_CW_EVENT_MASK,
(const uint32_t[]) { determine_evmask(ps, w->id, WIN_EVMODE_FRAME) });
}
// Recheck focus
recheck_focus(ps);
}
/**
* Set no_fading_openclose option.
*
* Don't affect fading already in progress
*/
void
opts_set_no_fading_openclose(session_t *ps, bool newval) {
ps->o.no_fading_openclose = newval;
}
//!@}
#endif
static inline int attr_unused
ev_serial(xcb_generic_event_t *ev) {
return ev->full_sequence;
}
static inline const char * attr_unused
ev_name(session_t *ps, xcb_generic_event_t *ev) {
static char buf[128];
switch (ev->response_type & 0x7f) {
CASESTRRET(FocusIn);
CASESTRRET(FocusOut);
CASESTRRET(CreateNotify);
CASESTRRET(ConfigureNotify);
CASESTRRET(DestroyNotify);
CASESTRRET(MapNotify);
CASESTRRET(UnmapNotify);
CASESTRRET(ReparentNotify);
CASESTRRET(CirculateNotify);
CASESTRRET(Expose);
CASESTRRET(PropertyNotify);
CASESTRRET(ClientMessage);
}
if (ps->damage_event + XCB_DAMAGE_NOTIFY == ev->response_type)
return "Damage";
if (ps->shape_exists && ev->response_type == ps->shape_event)
return "ShapeNotify";
if (ps->xsync_exists) {
int o = ev->response_type - ps->xsync_event;
switch (o) {
CASESTRRET(XSyncCounterNotify);
CASESTRRET(XSyncAlarmNotify);
}
}
sprintf(buf, "Event %d", ev->response_type);
return buf;
}
static inline xcb_window_t attr_unused
ev_window(session_t *ps, xcb_generic_event_t *ev) {
switch (ev->response_type) {
case FocusIn:
case FocusOut:
return ((xcb_focus_in_event_t *)ev)->event;
case CreateNotify:
return ((xcb_create_notify_event_t *)ev)->window;
case ConfigureNotify:
return ((xcb_configure_notify_event_t *)ev)->window;
case DestroyNotify:
return ((xcb_destroy_notify_event_t *)ev)->window;
case MapNotify:
return ((xcb_map_notify_event_t *)ev)->window;
case UnmapNotify:
return ((xcb_unmap_notify_event_t *)ev)->window;
case ReparentNotify:
return ((xcb_reparent_notify_event_t *)ev)->window;
case CirculateNotify:
return ((xcb_circulate_notify_event_t *)ev)->window;
case Expose:
return ((xcb_expose_event_t *)ev)->window;
case PropertyNotify:
return ((xcb_property_notify_event_t *)ev)->window;
case ClientMessage:
return ((xcb_client_message_event_t *)ev)->window;
default:
if (ps->damage_event + XCB_DAMAGE_NOTIFY == ev->response_type) {
return ((xcb_damage_notify_event_t *)ev)->drawable;
}
if (ps->shape_exists && ev->response_type == ps->shape_event) {
return ((xcb_shape_notify_event_t *) ev)->affected_window;
}
return 0;
}
}
static inline const char *
ev_focus_mode_name(xcb_focus_in_event_t* ev) {
switch (ev->mode) {
CASESTRRET(NotifyNormal);
CASESTRRET(NotifyWhileGrabbed);
CASESTRRET(NotifyGrab);
CASESTRRET(NotifyUngrab);
}
return "Unknown";
}
static inline const char *
ev_focus_detail_name(xcb_focus_in_event_t* ev) {
switch (ev->detail) {
CASESTRRET(NotifyAncestor);
CASESTRRET(NotifyVirtual);
CASESTRRET(NotifyInferior);
CASESTRRET(NotifyNonlinear);
CASESTRRET(NotifyNonlinearVirtual);
CASESTRRET(NotifyPointer);
CASESTRRET(NotifyPointerRoot);
CASESTRRET(NotifyDetailNone);
}
return "Unknown";
}
static inline void attr_unused
ev_focus_report(xcb_focus_in_event_t *ev) {
log_trace("{ mode: %s, detail: %s }\n", ev_focus_mode_name(ev),
ev_focus_detail_name(ev));
}
// === Events ===
/**
* Determine whether we should respond to a <code>FocusIn/Out</code>
* event.
*/
/*
inline static bool
ev_focus_accept(XFocusChangeEvent *ev) {
return NotifyNormal == ev->mode || NotifyUngrab == ev->mode;
}
*/
static inline void
ev_focus_in(session_t *ps, xcb_focus_in_event_t *ev) {
#ifdef DEBUG_EVENTS
ev_focus_report(ev);
#endif
recheck_focus(ps);
}
inline static void
ev_focus_out(session_t *ps, xcb_focus_out_event_t *ev) {
#ifdef DEBUG_EVENTS
ev_focus_report(ev);
#endif
recheck_focus(ps);
}
inline static void
ev_create_notify(session_t *ps, xcb_create_notify_event_t *ev) {
assert(ev->parent == ps->root);
add_win(ps, ev->window, 0);
}
inline static void
ev_configure_notify(session_t *ps, xcb_configure_notify_event_t *ev) {
log_trace("{ send_event: %d, id: %#010x, above: %#010x, override_redirect: %d }",
ev->event, ev->window, ev->above_sibling, ev->override_redirect);
configure_win(ps, ev);
}
inline static void
ev_destroy_notify(session_t *ps, xcb_destroy_notify_event_t *ev) {
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, true);
}
}
inline static void
ev_map_notify(session_t *ps, xcb_map_notify_event_t *ev) {
map_win(ps, ev->window);
// FocusIn/Out may be ignored when the window is unmapped, so we must
// recheck focus here
if (ps->o.track_focus) {
recheck_focus(ps);
}
}
inline static void
ev_unmap_notify(session_t *ps, xcb_unmap_notify_event_t *ev) {
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, false);
}
}
inline static void
ev_reparent_notify(session_t *ps, xcb_reparent_notify_event_t *ev) {
log_trace("{ new_parent: %#010x, override_redirect: %d }",
ev->parent, ev->override_redirect);
if (ev->parent == ps->root) {
// new window
add_win(ps, ev->window, 0);
} else {
// otherwise, find and destroy the window first
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, true);
}
// Reset event mask in case something wrong happens
xcb_change_window_attributes(ps->c, ev->window, XCB_CW_EVENT_MASK,
(const uint32_t[]) { determine_evmask(ps, ev->window, WIN_EVMODE_UNKNOWN) });
// Check if the window is an undetected client window
// Firstly, check if it's a known client window
if (!find_toplevel(ps, ev->window)) {
// If not, look for its frame window
win *w_top = find_toplevel2(ps, ev->parent);
// If found, and the client window has not been determined, or its
// frame may not have a correct client, continue
if (w_top && (!w_top->client_win
|| w_top->client_win == w_top->id)) {
// If it has WM_STATE, mark it the client window
if (wid_has_prop(ps, ev->window, ps->atom_client)) {
w_top->wmwin = false;
win_unmark_client(ps, w_top);
win_mark_client(ps, w_top, ev->window);
}
// Otherwise, watch for WM_STATE on it
else {
xcb_change_window_attributes(ps->c, ev->window, XCB_CW_EVENT_MASK, (const uint32_t[]) {
determine_evmask(ps, ev->window, WIN_EVMODE_UNKNOWN) | XCB_EVENT_MASK_PROPERTY_CHANGE });
}
}
}
}
}
inline static void
ev_circulate_notify(session_t *ps, xcb_circulate_notify_event_t *ev) {
circulate_win(ps, ev);
}
inline static void
ev_expose(session_t *ps, xcb_expose_event_t *ev) {
if (ev->window == ps->root || (ps->overlay && ev->window == ps->overlay)) {
int more = ev->count + 1;
if (ps->n_expose == ps->size_expose) {
if (ps->expose_rects) {
ps->expose_rects = crealloc(ps->expose_rects, ps->size_expose + more);
ps->size_expose += more;
} else {
ps->expose_rects = ccalloc(more, rect_t);
ps->size_expose = more;
}
}
ps->expose_rects[ps->n_expose].x1 = ev->x;
ps->expose_rects[ps->n_expose].y1 = ev->y;
ps->expose_rects[ps->n_expose].x2 = ev->x + ev->width;
ps->expose_rects[ps->n_expose].y2 = ev->y + ev->height;
ps->n_expose++;
if (ev->count == 0) {
expose_root(ps, ps->expose_rects, ps->n_expose);
ps->n_expose = 0;
}
}
}
/**
* Update current active window based on EWMH _NET_ACTIVE_WIN.
*
* Does not change anything if we fail to get the attribute or the window
* returned could not be found.
*/
static void
update_ewmh_active_win(session_t *ps) {
// Search for the window
xcb_window_t wid = wid_get_prop_window(ps, ps->root, ps->atom_ewmh_active_win);
win *w = find_win_all(ps, wid);
// Mark the window focused. No need to unfocus the previous one.
if (w) win_set_focused(ps, w, true);
}
inline static void
ev_property_notify(session_t *ps, xcb_property_notify_event_t *ev) {
#ifdef DEBUG_EVENTS
{
// Print out changed atom
xcb_get_atom_name_reply_t *reply =
xcb_get_atom_name_reply(ps->c, xcb_get_atom_name(ps->c, ev->atom), NULL);
const char *name = "?";
int name_len = 1;
if (reply) {
name = xcb_get_atom_name_name(reply);
name_len = xcb_get_atom_name_name_length(reply);
}
log_trace("{ atom = %.*s }", name_len, name);
free(reply);
}
#endif
if (ps->root == ev->window) {
if (ps->o.track_focus && ps->o.use_ewmh_active_win
&& ps->atom_ewmh_active_win == ev->atom) {
update_ewmh_active_win(ps);
} else {
// Destroy the root "image" if the wallpaper probably changed
if (x_is_root_back_pixmap_atom(ps, ev->atom)) {
root_damaged(ps);
}
}
// Unconcerned about any other proprties on root window
return;
}
// If WM_STATE changes
if (ev->atom == ps->atom_client) {
// Check whether it could be a client window
if (!find_toplevel(ps, ev->window)) {
// Reset event mask anyway
xcb_change_window_attributes(ps->c, ev->window, XCB_CW_EVENT_MASK, (const uint32_t[]) {
determine_evmask(ps, ev->window, WIN_EVMODE_UNKNOWN) });
win *w_top = find_toplevel2(ps, ev->window);
// Initialize client_win as early as possible
if (w_top && (!w_top->client_win || w_top->client_win == w_top->id)
&& wid_has_prop(ps, ev->window, ps->atom_client)) {
w_top->wmwin = false;
win_unmark_client(ps, w_top);
win_mark_client(ps, w_top, ev->window);
}
}
}
// If _NET_WM_WINDOW_TYPE changes... God knows why this would happen, but
// there are always some stupid applications. (#144)
if (ev->atom == ps->atom_win_type) {
win *w = NULL;
if ((w = find_toplevel(ps, ev->window)))
win_upd_wintype(ps, w);
}
// If _NET_WM_OPACITY changes
if (ev->atom == ps->atom_opacity) {
win *w = find_win(ps, ev->window) ?: find_toplevel(ps, ev->window);
if (w) {
win_update_opacity_prop(ps, w);
// we cannot receive OPACITY change when window is destroyed
assert(w->state != WSTATE_DESTROYING);
if (w->state == WSTATE_MAPPED) {
// See the winstate_t transition table
w->state = WSTATE_FADING;
}
w->opacity_tgt = win_get_opacity_target(ps, w);
}
}
// If frame extents property changes
if (ps->o.frame_opacity && ev->atom == ps->atom_frame_extents) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_update_frame_extents(ps, w, ev->window);
// If frame extents change, the window needs repaint
add_damage_from_win(ps, w);
}
}
// If name changes
if (ps->o.track_wdata
&& (ps->atom_name == ev->atom || ps->atom_name_ewmh == ev->atom)) {
win *w = find_toplevel(ps, ev->window);
if (w && 1 == win_get_name(ps, w)) {
win_on_factor_change(ps, w);
}
}
// If class changes
if (ps->o.track_wdata && ps->atom_class == ev->atom) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_get_class(ps, w);
win_on_factor_change(ps, w);
}
}
// If role changes
if (ps->o.track_wdata && ps->atom_role == ev->atom) {
win *w = find_toplevel(ps, ev->window);
if (w && 1 == win_get_role(ps, w)) {
win_on_factor_change(ps, w);
}
}
// If _COMPTON_SHADOW changes
if (ps->o.respect_prop_shadow && ps->atom_compton_shadow == ev->atom) {
win *w = find_win(ps, ev->window);
if (w)
win_update_prop_shadow(ps, w);
}
// If a leader property changes
if ((ps->o.detect_transient && ps->atom_transient == ev->atom)
|| (ps->o.detect_client_leader && ps->atom_client_leader == ev->atom)) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_update_leader(ps, w);
}
}
// Check for other atoms we are tracking
for (latom_t *platom = ps->track_atom_lst; platom; platom = platom->next) {
if (platom->atom == ev->atom) {
win *w = find_win(ps, ev->window);
if (!w)
w = find_toplevel(ps, ev->window);
if (w)
win_on_factor_change(ps, w);
break;
}
}
}
inline static void
ev_damage_notify(session_t *ps, xcb_damage_notify_event_t *de) {
/*
if (ps->root == de->drawable) {
root_damaged();
return;
} */
win *w = find_win(ps, de->drawable);
if (!w) return;
repair_win(ps, w);
}
inline static void
ev_shape_notify(session_t *ps, xcb_shape_notify_event_t *ev) {
win *w = find_win(ps, ev->affected_window);
if (!w || w->a.map_state == XCB_MAP_STATE_UNMAPPED) return;
/*
* Empty bounding_shape may indicated an
* unmapped/destroyed window, in which case
* seemingly BadRegion errors would be triggered
* if we attempt to rebuild border_size
*/
// Mark the old border_size as damaged
region_t tmp = win_get_bounding_shape_global_by_val(w);
add_damage(ps, &tmp);
pixman_region32_fini(&tmp);
win_update_bounding_shape(ps, w);
// Mark the new border_size as damaged
tmp = win_get_bounding_shape_global_by_val(w);
add_damage(ps, &tmp);
pixman_region32_fini(&tmp);
w->reg_ignore_valid = false;
}
/**
* Handle ScreenChangeNotify events from X RandR extension.
*/
static void
ev_screen_change_notify(session_t *ps,
xcb_randr_screen_change_notify_event_t attr_unused *ev) {
if (ps->o.xinerama_shadow_crop)
cxinerama_upd_scrs(ps);
if (ps->o.sw_opti && !ps->o.refresh_rate) {
update_refresh_rate(ps);
if (!ps->refresh_rate) {
log_warn("Refresh rate detection failed. swopti will be temporarily disabled");
}
}
}
inline static void
ev_selection_clear(session_t *ps,
xcb_selection_clear_event_t attr_unused *ev) {
// The only selection we own is the _NET_WM_CM_Sn selection.
// If we lose that one, we should exit.
log_fatal("Another composite manager started and took the _NET_WM_CM_Sn selection.");
exit(1);
}
/**
* Get a window's name from window ID.
*/
static inline void attr_unused
ev_window_name(session_t *ps, xcb_window_t wid, char **name) {
*name = "";
if (wid) {
*name = "(Failed to get title)";
if (ps->root == wid)
*name = "(Root window)";
else if (ps->overlay == wid)
*name = "(Overlay)";
else {
win *w = find_win(ps, wid);
if (!w)
w = find_toplevel(ps, wid);
if (w)
win_get_name(ps, w);
if (w && w->name)
*name = w->name;
else
*name = "unknown";
}
}
}
static void
ev_handle(session_t *ps, xcb_generic_event_t *ev) {
if ((ev->response_type & 0x7f) != KeymapNotify) {
discard_ignore(ps, ev->full_sequence);
}
#ifdef DEBUG_EVENTS
if (ev->response_type != ps->damage_event + XCB_DAMAGE_NOTIFY) {
xcb_window_t wid = ev_window(ps, ev);
char *window_name = NULL;
ev_window_name(ps, wid, &window_name);
log_trace("event %10.10s serial %#010x window %#010lx \"%s\"",
ev_name(ps, ev), ev_serial(ev), wid, window_name);
}
#endif
// Check if a custom XEvent constructor was registered in xlib for this event
// type, and call it discarding the constructed XEvent if any. XESetWireToEvent
// might be used by libraries to intercept messages from the X server e.g. the
// OpenGL lib waiting for DRI2 events.
// XXX This exists to workaround compton issue #33, #34, #47
// For even more details, see:
// https://bugs.freedesktop.org/show_bug.cgi?id=35945
// https://lists.freedesktop.org/archives/xcb/2011-November/007337.html
auto proc = XESetWireToEvent(ps->dpy, ev->response_type, 0);
if (proc) {
XESetWireToEvent(ps->dpy, ev->response_type, proc);
XEvent dummy;
// Stop Xlib from complaining about lost sequence numbers.
// proc might also just be Xlib internal event processing functions, and
// because they probably won't see all X replies, they will complain about
// missing sequence numbers.
//
// We only need the low 16 bits
ev->sequence = (uint16_t)(LastKnownRequestProcessed(ps->dpy) & 0xffff);
proc(ps->dpy, &dummy, (xEvent *)ev);
}
// XXX redraw needs to be more fine grained
queue_redraw(ps);
switch (ev->response_type) {
case FocusIn:
ev_focus_in(ps, (xcb_focus_in_event_t *)ev);
break;
case FocusOut:
ev_focus_out(ps, (xcb_focus_out_event_t *)ev);
break;
case CreateNotify:
ev_create_notify(ps, (xcb_create_notify_event_t *)ev);
break;
case ConfigureNotify:
ev_configure_notify(ps, (xcb_configure_notify_event_t *)ev);
break;
case DestroyNotify:
ev_destroy_notify(ps, (xcb_destroy_notify_event_t *)ev);
break;
case MapNotify:
ev_map_notify(ps, (xcb_map_notify_event_t *)ev);
break;
case UnmapNotify:
ev_unmap_notify(ps, (xcb_unmap_notify_event_t *)ev);
break;
case ReparentNotify:
ev_reparent_notify(ps, (xcb_reparent_notify_event_t *)ev);
break;
case CirculateNotify:
ev_circulate_notify(ps, (xcb_circulate_notify_event_t *)ev);
break;
case Expose:
ev_expose(ps, (xcb_expose_event_t *)ev);
break;
case PropertyNotify:
ev_property_notify(ps, (xcb_property_notify_event_t *)ev);
break;
case SelectionClear:
ev_selection_clear(ps, (xcb_selection_clear_event_t *)ev);
break;
case 0:
ev_xcb_error(ps, (xcb_generic_error_t *)ev);
break;
default:
if (ps->shape_exists && ev->response_type == ps->shape_event) {
ev_shape_notify(ps, (xcb_shape_notify_event_t *) ev);
break;
}
if (ps->randr_exists && ev->response_type == (ps->randr_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY)) {
ev_screen_change_notify(ps, (xcb_randr_screen_change_notify_event_t *) ev);
break;
}
if (ps->damage_event + XCB_DAMAGE_NOTIFY == ev->response_type) {
ev_damage_notify(ps, (xcb_damage_notify_event_t *) ev);
break;
}
}
}
// === Main ===
/**
* Register a window as symbol, and initialize GLX context if wanted.
*/
static bool
register_cm(session_t *ps) {
assert(!ps->reg_win);
ps->reg_win = XCreateSimpleWindow(ps->dpy, ps->root, 0, 0, 1, 1, 0,
XCB_NONE, XCB_NONE);
if (!ps->reg_win) {
log_fatal("Failed to create window.");
return false;
}
// Unredirect the window if it's redirected, just in case
if (ps->redirected)
xcb_composite_unredirect_window(ps->c, ps->reg_win, XCB_COMPOSITE_REDIRECT_MANUAL);
{
XClassHint *h = XAllocClassHint();
if (h) {
h->res_name = "compton";
h->res_class = "xcompmgr";
}
Xutf8SetWMProperties(ps->dpy, ps->reg_win, "xcompmgr", "xcompmgr",
NULL, 0, NULL, NULL, h);
cxfree(h);
}
// Set _NET_WM_PID
{
uint32_t pid = getpid();
xcb_change_property(ps->c, XCB_PROP_MODE_REPLACE, ps->reg_win,
get_atom(ps, "_NET_WM_PID"), XCB_ATOM_CARDINAL, 32, 1, &pid);
}
// Set COMPTON_VERSION
if (!wid_set_text_prop(ps, ps->reg_win, get_atom(ps, "COMPTON_VERSION"),
COMPTON_VERSION)) {
log_error("Failed to set COMPTON_VERSION.");
}
// Acquire X Selection _NET_WM_CM_S?
if (!ps->o.no_x_selection) {
unsigned len = strlen(REGISTER_PROP) + 2;
int s = ps->scr;
Atom atom;
while (s >= 10) {
++len;
s /= 10;
}
auto buf = ccalloc(len, char);
snprintf(buf, len, REGISTER_PROP "%d", ps->scr);
buf[len - 1] = '\0';
atom = get_atom(ps, buf);
free(buf);
xcb_get_selection_owner_reply_t *reply =
xcb_get_selection_owner_reply(ps->c,
xcb_get_selection_owner(ps->c, atom), NULL);
if (reply && reply->owner != XCB_NONE) {
free(reply);
log_fatal("Another composite manager is already running");
return false;
}
free(reply);
xcb_set_selection_owner(ps->c, ps->reg_win, atom, 0);
}
return true;
}
/**
* Write PID to a file.
*/
static inline bool
write_pid(session_t *ps) {
if (!ps->o.write_pid_path)
return true;
FILE *f = fopen(ps->o.write_pid_path, "w");
if (unlikely(!f)) {
log_error("Failed to write PID to \"%s\".", ps->o.write_pid_path);
return false;
}
fprintf(f, "%ld\n", (long) getpid());
fclose(f);
return true;
}
/**
* Fetch all required atoms and save them to a session.
*/
static void
init_atoms(session_t *ps) {
ps->atom_opacity = get_atom(ps, "_NET_WM_WINDOW_OPACITY");
ps->atom_frame_extents = get_atom(ps, "_NET_FRAME_EXTENTS");
ps->atom_client = get_atom(ps, "WM_STATE");
ps->atom_name = XCB_ATOM_WM_NAME;
ps->atom_name_ewmh = get_atom(ps, "_NET_WM_NAME");
ps->atom_class = XCB_ATOM_WM_CLASS;
ps->atom_role = get_atom(ps, "WM_WINDOW_ROLE");
ps->atom_transient = XCB_ATOM_WM_TRANSIENT_FOR;
ps->atom_client_leader = get_atom(ps, "WM_CLIENT_LEADER");
ps->atom_ewmh_active_win = get_atom(ps, "_NET_ACTIVE_WINDOW");
ps->atom_compton_shadow = get_atom(ps, "_COMPTON_SHADOW");
ps->atom_win_type = get_atom(ps, "_NET_WM_WINDOW_TYPE");
ps->atoms_wintypes[WINTYPE_UNKNOWN] = 0;
ps->atoms_wintypes[WINTYPE_DESKTOP] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_DESKTOP");
ps->atoms_wintypes[WINTYPE_DOCK] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_DOCK");
ps->atoms_wintypes[WINTYPE_TOOLBAR] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_TOOLBAR");
ps->atoms_wintypes[WINTYPE_MENU] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_MENU");
ps->atoms_wintypes[WINTYPE_UTILITY] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_UTILITY");
ps->atoms_wintypes[WINTYPE_SPLASH] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_SPLASH");
ps->atoms_wintypes[WINTYPE_DIALOG] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_DIALOG");
ps->atoms_wintypes[WINTYPE_NORMAL] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_NORMAL");
ps->atoms_wintypes[WINTYPE_DROPDOWN_MENU] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_DROPDOWN_MENU");
ps->atoms_wintypes[WINTYPE_POPUP_MENU] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_POPUP_MENU");
ps->atoms_wintypes[WINTYPE_TOOLTIP] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_TOOLTIP");
ps->atoms_wintypes[WINTYPE_NOTIFY] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_NOTIFICATION");
ps->atoms_wintypes[WINTYPE_COMBO] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_COMBO");
ps->atoms_wintypes[WINTYPE_DND] = get_atom(ps,
"_NET_WM_WINDOW_TYPE_DND");
}
/**
* Update refresh rate info with X Randr extension.
*/
static void
update_refresh_rate(session_t *ps) {
xcb_randr_get_screen_info_reply_t *randr_info =
xcb_randr_get_screen_info_reply(ps->c,
xcb_randr_get_screen_info(ps->c, ps->root), NULL);
if (!randr_info)
return;
ps->refresh_rate = randr_info->rate;
free(randr_info);
if (ps->refresh_rate)
ps->refresh_intv = US_PER_SEC / ps->refresh_rate;
else
ps->refresh_intv = 0;
}
/**
* Initialize refresh-rated based software optimization.
*
* @return true for success, false otherwise
*/
static bool
swopti_init(session_t *ps) {
// Prepare refresh rate
// Check if user provides one
ps->refresh_rate = ps->o.refresh_rate;
if (ps->refresh_rate)
ps->refresh_intv = US_PER_SEC / ps->refresh_rate;
// Auto-detect refresh rate otherwise
if (!ps->refresh_rate && ps->randr_exists) {
update_refresh_rate(ps);
}
// Turn off vsync_sw if we can't get the refresh rate
if (!ps->refresh_rate)
return false;
return true;
}
/**
* Modify a struct timeval timeout value to render at a fixed pace.
*
* @param ps current session
* @param[in,out] ptv pointer to the timeout
*/
static double
swopti_handle_timeout(session_t *ps) {
if (!ps->refresh_intv)
return 0;
// Get the microsecond offset of the time when the we reach the timeout
// I don't think a 32-bit long could overflow here.
long offset = (get_time_timeval().tv_usec - ps->paint_tm_offset) % ps->refresh_intv;
if (offset < 0)
offset += ps->refresh_intv;
// If the target time is sufficiently close to a refresh time, don't add
// an offset, to avoid certain blocking conditions.
if (offset < SWOPTI_TOLERANCE
|| offset > ps->refresh_intv - SWOPTI_TOLERANCE)
return 0;
// Add an offset so we wait until the next refresh after timeout
return (ps->refresh_intv - offset) / 1e6;
}
/**
* Initialize X composite overlay window.
*/
static bool
init_overlay(session_t *ps) {
xcb_composite_get_overlay_window_reply_t *reply =
xcb_composite_get_overlay_window_reply(ps->c,
xcb_composite_get_overlay_window(ps->c, ps->root), NULL);
if (reply) {
ps->overlay = reply->overlay_win;
free(reply);
} else {
ps->overlay = XCB_NONE;
}
if (ps->overlay) {
// Set window region of the overlay window, code stolen from
// compiz-0.8.8
xcb_generic_error_t *e;
e = XCB_SYNCED_VOID(xcb_shape_mask, ps->c, XCB_SHAPE_SO_SET, XCB_SHAPE_SK_BOUNDING,
ps->overlay, 0, 0, 0);
if (e) {
log_fatal("Failed to set the bounding shape of overlay, giving up.");
exit(1);
}
e = XCB_SYNCED_VOID(xcb_shape_rectangles, ps->c, XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT,
XCB_CLIP_ORDERING_UNSORTED, ps->overlay, 0, 0, 0, NULL);
if (e) {
log_fatal("Failed to set the input shape of overlay, giving up.");
exit(1);
}
// Listen to Expose events on the overlay
xcb_change_window_attributes(ps->c, ps->overlay, XCB_CW_EVENT_MASK,
(const uint32_t[]) { XCB_EVENT_MASK_EXPOSURE });
// Retrieve DamageNotify on root window if we are painting on an
// overlay
// root_damage = XDamageCreate(ps->dpy, root, XDamageReportNonEmpty);
// Unmap overlay, firstly. But this typically does not work because
// the window isn't created yet.
// xcb_unmap_window(c, ps->overlay);
// XFlush(ps->dpy);
} else {
log_error("Cannot get X Composite overlay window. Falling "
"back to painting on root window.");
}
log_debug("overlay = %#010x", ps->overlay);
return ps->overlay;
}
/**
* Redirect all windows.
*/
static void
redir_start(session_t *ps) {
if (!ps->redirected) {
log_debug("Screen redirected.");
// Map overlay window. Done firstly according to this:
// https://bugzilla.gnome.org/show_bug.cgi?id=597014
if (ps->overlay)
xcb_map_window(ps->c, ps->overlay);
xcb_composite_redirect_subwindows(ps->c, ps->root, XCB_COMPOSITE_REDIRECT_MANUAL);
/*
// Unredirect GL context window as this may have an effect on VSync:
// < http://dri.freedesktop.org/wiki/CompositeSwap >
xcb_composite_unredirect_window(c, ps->reg_win, XCB_COMPOSITE_REDIRECT_MANUAL);
if (ps->o.paint_on_overlay && ps->overlay) {
xcb_composite_unredirect_window(c, ps->overlay,
XCB_COMPOSITE_REDIRECT_MANUAL);
} */
// Must call XSync() here
x_sync(ps->c);
ps->redirected = true;
// Repaint the whole screen
force_repaint(ps);
}
}
/**
* Unredirect all windows.
*/
static void
redir_stop(session_t *ps) {
if (ps->redirected) {
log_debug("Screen unredirected.");
// Destroy all Pictures as they expire once windows are unredirected
// If we don't destroy them here, looks like the resources are just
// kept inaccessible somehow
for (win *w = ps->list; w; w = w->next) {
free_paint(ps, &w->paint);
}
xcb_composite_unredirect_subwindows(ps->c, ps->root, XCB_COMPOSITE_REDIRECT_MANUAL);
// Unmap overlay window
if (ps->overlay)
xcb_unmap_window(ps->c, ps->overlay);
// Must call XSync() here
x_sync(ps->c);
ps->redirected = false;
}
}
// Handle queued events before we go to sleep
static void
handle_queued_x_events(EV_P_ ev_prepare *w, int revents) {
session_t *ps = session_ptr(w, event_check);
xcb_generic_event_t *ev;
while ((ev = xcb_poll_for_queued_event(ps->c))) {
ev_handle(ps, ev);
free(ev);
};
// Flush because if we go into sleep when there is still
// requests in the outgoing buffer, they will not be sent
// for an indefinite amount of time.
// Use XFlush here too, we might still use some Xlib functions
// because OpenGL.
XFlush(ps->dpy);
xcb_flush(ps->c);
int err = xcb_connection_has_error(ps->c);
if (err) {
log_fatal("X11 server connection broke (error %d)", err);
exit(1);
}
}
/**
* Unredirection timeout callback.
*/
static void
tmout_unredir_callback(EV_P_ ev_timer *w, int revents) {
session_t *ps = session_ptr(w, unredir_timer);
ps->tmout_unredir_hit = true;
queue_redraw(ps);
}
static void
fade_timer_callback(EV_P_ ev_timer *w, int revents) {
session_t *ps = session_ptr(w, fade_timer);
queue_redraw(ps);
}
static void
_draw_callback(EV_P_ session_t *ps, int revents) {
if (ps->o.benchmark) {
if (ps->o.benchmark_wid) {
win *wi = find_win(ps, ps->o.benchmark_wid);
if (!wi) {
log_fatal("Couldn't find specified benchmark window.");
exit(1);
}
add_damage_from_win(ps, wi);
}
else {
force_repaint(ps);
}
}
bool fade_running = false;
win *t = paint_preprocess(ps, ps->list, &fade_running);
ps->tmout_unredir_hit = false;
// Start/stop fade timer depends on whether window are fading
if (!fade_running && ev_is_active(&ps->fade_timer))
ev_timer_stop(ps->loop, &ps->fade_timer);
else if (fade_running && !ev_is_active(&ps->fade_timer)) {
ev_timer_set(&ps->fade_timer, fade_timeout(ps), 0);
ev_timer_start(ps->loop, &ps->fade_timer);
}
// If the screen is unredirected, free all_damage to stop painting
if (ps->redirected && ps->o.stoppaint_force != ON) {
static int paint = 0;
paint_all(ps, t, false);
paint++;
if (ps->o.benchmark && paint >= ps->o.benchmark)
exit(0);
}
if (!fade_running)
ps->fade_time = 0L;
ps->redraw_needed = false;
}
static void
draw_callback(EV_P_ ev_idle *w, int revents) {
// This function is not used if we are using --swopti
session_t *ps = session_ptr(w, draw_idle);
_draw_callback(EV_A_ ps, revents);
// Don't do painting non-stop unless we are in benchmark mode
if (!ps->o.benchmark)
ev_idle_stop(ps->loop, &ps->draw_idle);
}
static void
delayed_draw_timer_callback(EV_P_ ev_timer *w, int revents) {
session_t *ps = session_ptr(w, delayed_draw_timer);
_draw_callback(EV_A_ ps, revents);
// We might have stopped the ev_idle in delayed_draw_callback,
// so we restart it if we are in benchmark mode
if (ps->o.benchmark)
ev_idle_start(EV_A_ &ps->draw_idle);
}
static void
delayed_draw_callback(EV_P_ ev_idle *w, int revents) {
// This function is only used if we are using --swopti
session_t *ps = session_ptr(w, draw_idle);
assert(ps->redraw_needed);
assert(!ev_is_active(&ps->delayed_draw_timer));
double delay = swopti_handle_timeout(ps);
if (delay < 1e-6) {
if (!ps->o.benchmark) {
ev_idle_stop(ps->loop, &ps->draw_idle);
}
return _draw_callback(EV_A_ ps, revents);
}
// This is a little bit hacky. When we get to this point in code, we need
// to update the screen , but we will only be updating after a delay, So
// we want to stop the ev_idle, so this callback doesn't get call repeatedly
// during the delay, we also want queue_redraw to not restart the ev_idle.
// So we stop ev_idle and leave ps->redraw_needed to be true. (effectively,
// ps->redraw_needed means if redraw is needed or if draw is in progress).
//
// We do this anyway even if we are in benchmark mode. That means we will
// have to restart draw_idle after the draw actually happened when we are in
// benchmark mode.
ev_idle_stop(ps->loop, &ps->draw_idle);
ev_timer_set(&ps->delayed_draw_timer, delay, 0);
ev_timer_start(ps->loop, &ps->delayed_draw_timer);
}
static void
x_event_callback(EV_P_ ev_io *w, int revents) {
session_t *ps = (session_t *)w;
xcb_generic_event_t *ev = xcb_poll_for_event(ps->c);
if (ev) {
ev_handle(ps, ev);
free(ev);
}
}
/**
* Turn on the program reset flag.
*
* This will result in compton resetting itself after next paint.
*/
static void
reset_enable(EV_P_ ev_signal *w, int revents) {
session_t *ps = session_ptr(w, usr1_signal);
log_info("compton is resetting...");
ev_break(ps->loop, EVBREAK_ALL);
}
static void
exit_enable(EV_P_ ev_signal *w, int revents) {
session_t *ps = session_ptr(w, int_signal);
log_info("compton is quitting...");
ps->quit = true;
ev_break(ps->loop, EVBREAK_ALL);
}
/**
* Initialize a session.
*
* @param argc number of commandline arguments
* @param argv commandline arguments
* @param dpy the X Display
* @param config_file the path to the config file
* @param all_xerros whether we should report all X errors
* @param fork whether we will fork after initialization
*/
static session_t *
session_init(int argc, char **argv, Display *dpy, const char *config_file,
bool all_xerrors, bool fork) {
static const session_t s_def = {
.backend_data = NULL,
.dpy = NULL,
.scr = 0,
.c = NULL,
.vis = 0,
.depth = 0,
.root = XCB_NONE,
.root_height = 0,
.root_width = 0,
// .root_damage = XCB_NONE,
.overlay = XCB_NONE,
.root_tile_fill = false,
.root_tile_paint = PAINT_INIT,
.tgt_picture = XCB_NONE,
.tgt_buffer = PAINT_INIT,
.reg_win = XCB_NONE,
#ifdef CONFIG_OPENGL
.glx_prog_win = GLX_PROG_MAIN_INIT,
#endif
.o = {
.backend = BKEND_XRENDER,
.glx_no_stencil = false,
.mark_wmwin_focused = false,
.mark_ovredir_focused = false,
.detect_rounded_corners = false,
.resize_damage = 0,
.unredir_if_possible = false,
.unredir_if_possible_blacklist = NULL,
.unredir_if_possible_delay = 0,
.redirected_force = UNSET,
.stoppaint_force = UNSET,
.dbus = false,
.benchmark = 0,
.benchmark_wid = XCB_NONE,
.logpath = NULL,
.refresh_rate = 0,
.sw_opti = false,
.vsync = VSYNC_NONE,
.vsync_aggressive = false,
.shadow_red = 0.0,
.shadow_green = 0.0,
.shadow_blue = 0.0,
.shadow_radius = 18,
.shadow_offset_x = -15,
.shadow_offset_y = -15,
.shadow_opacity = .75,
.shadow_blacklist = NULL,
.shadow_ignore_shaped = false,
.respect_prop_shadow = false,
.xinerama_shadow_crop = false,
.fade_in_step = 0.028,
.fade_out_step = 0.03,
.fade_delta = 10,
.no_fading_openclose = false,
.no_fading_destroyed_argb = false,
.fade_blacklist = NULL,
.inactive_opacity = 1.0,
.inactive_opacity_override = false,
.active_opacity = 1.0,
.frame_opacity = 1.0,
.detect_client_opacity = false,
.blur_background = false,
.blur_background_frame = false,
.blur_background_fixed = false,
.blur_background_blacklist = NULL,
.blur_kerns = { NULL },
.inactive_dim = 0.0,
.inactive_dim_fixed = false,
.invert_color_list = NULL,
.opacity_rules = NULL,
.use_ewmh_active_win = false,
.focus_blacklist = NULL,
.detect_transient = false,
.detect_client_leader = false,
.track_focus = false,
.track_wdata = false,
.track_leader = false,
},
.time_start = { 0, 0 },
.redirected = false,
.alpha_picts = NULL,
.fade_time = 0L,
.ignore_head = NULL,
.ignore_tail = NULL,
.quit = false,
.expose_rects = NULL,
.size_expose = 0,
.n_expose = 0,
.list = NULL,
.active_win = NULL,
.active_leader = XCB_NONE,
.black_picture = XCB_NONE,
.cshadow_picture = XCB_NONE,
.white_picture = XCB_NONE,
.gaussian_map = NULL,
.refresh_rate = 0,
.refresh_intv = 0UL,
.paint_tm_offset = 0L,
#ifdef CONFIG_VSYNC_DRM
.drm_fd = -1,
#endif
.xfixes_event = 0,
.xfixes_error = 0,
.damage_event = 0,
.damage_error = 0,
.render_event = 0,
.render_error = 0,
.composite_event = 0,
.composite_error = 0,
.composite_opcode = 0,
.has_name_pixmap = false,
.shape_exists = false,
.shape_event = 0,
.shape_error = 0,
.randr_exists = 0,
.randr_event = 0,
.randr_error = 0,
#ifdef CONFIG_OPENGL
.glx_exists = false,
.glx_event = 0,
.glx_error = 0,
#endif
.xrfilter_convolution_exists = false,
.atom_opacity = XCB_NONE,
.atom_frame_extents = XCB_NONE,
.atom_client = XCB_NONE,
.atom_name = XCB_NONE,
.atom_name_ewmh = XCB_NONE,
.atom_class = XCB_NONE,
.atom_role = XCB_NONE,
.atom_transient = XCB_NONE,
.atom_ewmh_active_win = XCB_NONE,
.atom_compton_shadow = XCB_NONE,
.atom_win_type = XCB_NONE,
.atoms_wintypes = { 0 },
.track_atom_lst = NULL,
#ifdef CONFIG_DBUS
.dbus_data = NULL,
#endif
};
log_init_tls();
auto stderr_logger = stderr_logger_new();
if (stderr_logger) {
// stderr logger might fail to create if we are already
// daemonized.
log_add_target_tls(stderr_logger);
}
// Allocate a session and copy default values into it
session_t *ps = cmalloc(session_t);
*ps = s_def;
ps->loop = EV_DEFAULT;
pixman_region32_init(&ps->screen_reg);
ps->ignore_tail = &ps->ignore_head;
gettimeofday(&ps->time_start, NULL);
ps->o.show_all_xerrors = all_xerrors;
// Use the same Display across reset, primarily for resource leak checking
ps->dpy = dpy;
ps->c = XGetXCBConnection(ps->dpy);
const xcb_query_extension_reply_t *ext_info;
XSetErrorHandler(xerror);
ps->scr = DefaultScreen(ps->dpy);
ps->root = RootWindow(ps->dpy, ps->scr);
ps->vis = XVisualIDFromVisual(DefaultVisual(ps->dpy, ps->scr));
ps->depth = DefaultDepth(ps->dpy, ps->scr);
// Start listening to events on root earlier to catch all possible
// root geometry changes
auto e = xcb_request_check(
ps->c, xcb_change_window_attributes_checked(
ps->c, ps->root, XCB_CW_EVENT_MASK,
(const uint32_t[]){XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY |
XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_STRUCTURE_NOTIFY |
XCB_EVENT_MASK_PROPERTY_CHANGE}));
if (e) {
log_error("Failed to setup root window event mask");
free(e);
}
ps->root_width = DisplayWidth(ps->dpy, ps->scr);
ps->root_height = DisplayHeight(ps->dpy, ps->scr);
xcb_prefetch_extension_data(ps->c, &xcb_render_id);
xcb_prefetch_extension_data(ps->c, &xcb_composite_id);
xcb_prefetch_extension_data(ps->c, &xcb_damage_id);
xcb_prefetch_extension_data(ps->c, &xcb_shape_id);
xcb_prefetch_extension_data(ps->c, &xcb_xfixes_id);
xcb_prefetch_extension_data(ps->c, &xcb_randr_id);
xcb_prefetch_extension_data(ps->c, &xcb_xinerama_id);
xcb_prefetch_extension_data(ps->c, &xcb_present_id);
xcb_prefetch_extension_data(ps->c, &xcb_sync_id);
ext_info = xcb_get_extension_data(ps->c, &xcb_render_id);
if (!ext_info || !ext_info->present) {
log_fatal("No render extension");
exit(1);
}
ps->render_event = ext_info->first_event;
ps->render_error = ext_info->first_error;
ext_info = xcb_get_extension_data(ps->c, &xcb_composite_id);
if (!ext_info || !ext_info->present) {
log_fatal("No composite extension");
exit(1);
}
ps->composite_opcode = ext_info->major_opcode;
ps->composite_event = ext_info->first_event;
ps->composite_error = ext_info->first_error;
{
xcb_composite_query_version_reply_t *reply =
xcb_composite_query_version_reply(ps->c,
xcb_composite_query_version(ps->c, XCB_COMPOSITE_MAJOR_VERSION, XCB_COMPOSITE_MINOR_VERSION),
NULL);
if (reply && (reply->major_version > 0 || reply->minor_version >= 2)) {
ps->has_name_pixmap = true;
}
free(reply);
}
ext_info = xcb_get_extension_data(ps->c, &xcb_damage_id);
if (!ext_info || !ext_info->present) {
log_fatal("No damage extension");
exit(1);
}
ps->damage_event = ext_info->first_event;
ps->damage_error = ext_info->first_error;
xcb_discard_reply(ps->c,
xcb_damage_query_version(ps->c, XCB_DAMAGE_MAJOR_VERSION, XCB_DAMAGE_MINOR_VERSION).sequence);
ext_info = xcb_get_extension_data(ps->c, &xcb_xfixes_id);
if (!ext_info || !ext_info->present) {
log_fatal("No XFixes extension");
exit(1);
}
ps->xfixes_event = ext_info->first_event;
ps->xfixes_error = ext_info->first_error;
xcb_discard_reply(ps->c,
xcb_xfixes_query_version(ps->c, XCB_XFIXES_MAJOR_VERSION, XCB_XFIXES_MINOR_VERSION).sequence);
// Parse configuration file
win_option_mask_t winopt_mask[NUM_WINTYPES] = {{0}};
bool shadow_enabled = false, fading_enable = false, hasneg = false;
char *config_file_to_free = NULL;
config_file = config_file_to_free =
parse_config(&ps->o, config_file, &shadow_enabled,
&fading_enable, &hasneg, winopt_mask);
if (IS_ERR(config_file_to_free)) {
return NULL;
}
// Parse all of the rest command line options
get_cfg(&ps->o, argc, argv, shadow_enabled, fading_enable, hasneg, winopt_mask);
if (ps->o.logpath) {
auto l = file_logger_new(ps->o.logpath);
if (l) {
log_info("Switching to log file: %s", ps->o.logpath);
if (stderr_logger) {
log_remove_target_tls(stderr_logger);
stderr_logger = NULL;
}
log_add_target_tls(l);
stderr_logger = NULL;
} else {
log_error("Failed to setup log file %s, I will keep using stderr", ps->o.logpath);
}
}
// Get needed atoms for c2 condition lists
if (!(c2_list_postprocess(ps, ps->o.unredir_if_possible_blacklist) &&
c2_list_postprocess(ps, ps->o.paint_blacklist) &&
c2_list_postprocess(ps, ps->o.shadow_blacklist) &&
c2_list_postprocess(ps, ps->o.fade_blacklist) &&
c2_list_postprocess(ps, ps->o.blur_background_blacklist) &&
c2_list_postprocess(ps, ps->o.invert_color_list) &&
c2_list_postprocess(ps, ps->o.opacity_rules) &&
c2_list_postprocess(ps, ps->o.focus_blacklist))) {
log_error("Post-processing of conditionals failed, some of your rules might not work");
}
rebuild_shadow_exclude_reg(ps);
// Query X Shape
ext_info = xcb_get_extension_data(ps->c, &xcb_shape_id);
if (ext_info && ext_info->present) {
ps->shape_event = ext_info->first_event;
ps->shape_error = ext_info->first_error;
ps->shape_exists = true;
}
ext_info = xcb_get_extension_data(ps->c, &xcb_randr_id);
if (ext_info && ext_info->present) {
ps->randr_exists = true;
ps->randr_event = ext_info->first_event;
ps->randr_error = ext_info->first_error;
}
ext_info = xcb_get_extension_data(ps->c, &xcb_present_id);
if (ext_info && ext_info->present) {
auto r =
xcb_present_query_version_reply(ps->c,
xcb_present_query_version(ps->c,
XCB_PRESENT_MAJOR_VERSION,
XCB_PRESENT_MINOR_VERSION),
NULL);
if (r) {
ps->present_exists = true;
free(r);
}
}
// Query X Sync
ext_info = xcb_get_extension_data(ps->c, &xcb_sync_id);
if (ext_info && ext_info->present) {
ps->xsync_error = ext_info->first_error;
ps->xsync_event = ext_info->first_event;
// Need X Sync 3.1 for fences
auto r = xcb_sync_initialize_reply(ps->c,
xcb_sync_initialize(ps->c,
XCB_SYNC_MAJOR_VERSION,
XCB_SYNC_MINOR_VERSION),
NULL);
if (r && (r->major_version > 3 ||
(r->major_version == 3 && r->minor_version >= 1))) {
ps->xsync_exists = true;
free(r);
}
}
ps->sync_fence = XCB_NONE;
if (!ps->xsync_exists && ps->o.xrender_sync_fence) {
log_error("XSync extension not found. No XSync fence sync is "
"possible. (xrender-sync-fence can't be enabled)");
ps->o.xrender_sync_fence = false;
}
if (ps->o.xrender_sync_fence) {
ps->sync_fence = xcb_generate_id(ps->c);
e = xcb_request_check(ps->c, xcb_sync_create_fence(ps->c, ps->root, ps->sync_fence, 0));
if (e) {
log_error("Failed to create a XSync fence. xrender-sync-fence will be disabled");
ps->o.xrender_sync_fence = false;
ps->sync_fence = XCB_NONE;
free(e);
}
}
// Query X RandR
if ((ps->o.sw_opti && !ps->o.refresh_rate) || ps->o.xinerama_shadow_crop) {
if (!ps->randr_exists) {
log_fatal("No XRandR extension. sw-opti, refresh-rate or xinerama-shadow-crop "
"cannot be enabled.");
exit(1);
}
}
// Query X Xinerama extension
if (ps->o.xinerama_shadow_crop) {
ext_info = xcb_get_extension_data(ps->c, &xcb_xinerama_id);
ps->xinerama_exists = ext_info && ext_info->present;
}
rebuild_screen_reg(ps);
// Overlay must be initialized before double buffer, and before creation
// of OpenGL context.
init_overlay(ps);
// Initialize filters, must be preceded by OpenGL context creation
if (!init_render(ps)) {
log_fatal("Failed to initialize the backend");
exit(1);
}
if (ps->o.print_diagnostics) {
print_diagnostics(ps, config_file);
free(config_file_to_free);
exit(0);
}
free(config_file_to_free);
if (bkend_use_glx(ps)) {
auto glx_logger = glx_string_marker_logger_new();
if (glx_logger) {
log_info("Enabling gl string marker");
log_add_target_tls(glx_logger);
}
}
// Initialize software optimization
if (ps->o.sw_opti)
ps->o.sw_opti = swopti_init(ps);
// Monitor screen changes if vsync_sw is enabled and we are using
// an auto-detected refresh rate, or when Xinerama features are enabled
if (ps->randr_exists && ((ps->o.sw_opti && !ps->o.refresh_rate)
|| ps->o.xinerama_shadow_crop))
xcb_randr_select_input(ps->c, ps->root, XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
cxinerama_upd_scrs(ps);
// Create registration window
if (!ps->reg_win && !register_cm(ps))
exit(1);
init_atoms(ps);
{
xcb_render_create_picture_value_list_t pa = {
.subwindowmode = IncludeInferiors,
};
ps->root_picture = x_create_picture_with_visual_and_pixmap(ps->c,
ps->vis, ps->root, XCB_RENDER_CP_SUBWINDOW_MODE, &pa);
if (ps->overlay != XCB_NONE) {
ps->tgt_picture = x_create_picture_with_visual_and_pixmap(ps->c,
ps->vis, ps->overlay, XCB_RENDER_CP_SUBWINDOW_MODE, &pa);
} else
ps->tgt_picture = ps->root_picture;
}
ev_io_init(&ps->xiow, x_event_callback, ConnectionNumber(ps->dpy), EV_READ);
ev_io_start(ps->loop, &ps->xiow);
ev_init(&ps->unredir_timer, tmout_unredir_callback);
if (ps->o.sw_opti)
ev_idle_init(&ps->draw_idle, delayed_draw_callback);
else
ev_idle_init(&ps->draw_idle, draw_callback);
ev_init(&ps->fade_timer, fade_timer_callback);
ev_init(&ps->delayed_draw_timer, delayed_draw_timer_callback);
// Set up SIGUSR1 signal handler to reset program
ev_signal_init(&ps->usr1_signal, reset_enable, SIGUSR1);
ev_signal_init(&ps->int_signal, exit_enable, SIGINT);
ev_signal_start(ps->loop, &ps->usr1_signal);
ev_signal_start(ps->loop, &ps->int_signal);
// xcb can read multiple events from the socket when a request with reply is
// made.
//
// Use an ev_prepare to make sure we cannot accidentally forget to handle them
// before we go to sleep.
//
// If we don't drain the queue before goes to sleep (i.e. blocking on socket
// input), we will be sleeping with events available in queue. Which might
// cause us to block indefinitely because arrival of new events could be
// dependent on processing of existing events (e.g. if we don't process damage
// event and do damage subtract, new damage event won't be generated).
//
// So we make use of a ev_prepare handle, which is called right before libev
// goes into sleep, to handle all the queued X events.
ev_prepare_init(&ps->event_check, handle_queued_x_events);
// Make sure nothing can cause xcb to read from the X socket after events are
// handled and before we going to sleep.
ev_set_priority(&ps->event_check, EV_MINPRI);
ev_prepare_start(ps->loop, &ps->event_check);
xcb_grab_server(ps->c);
// Initialize DBus. We need to do this early, because add_win might call dbus functions
if (ps->o.dbus) {
#ifdef CONFIG_DBUS
cdbus_init(ps, DisplayString(ps->dpy));
if (!ps->dbus_data) {
ps->o.dbus = false;
}
#else
log_fatal("DBus support not compiled in!");
exit(1);
#endif
}
{
xcb_window_t *children;
int nchildren;
xcb_query_tree_reply_t *reply = xcb_query_tree_reply(ps->c,
xcb_query_tree(ps->c, ps->root), NULL);
if (reply) {
children = xcb_query_tree_children(reply);
nchildren = xcb_query_tree_children_length(reply);
} else {
children = NULL;
nchildren = 0;
}
for (int i = 0; i < nchildren; i++) {
add_win(ps, children[i], i ? children[i-1] : XCB_NONE);
}
free(reply);
log_trace("Initial stack:");
for (win *c = ps->list; c; c = c->next) {
const char *desc = "";
if (c->destroying) {
desc = "(D) ";
}
log_trace("%#010x \"%s\" %s", c->id, c->name, desc);
}
}
if (ps->o.track_focus) {
recheck_focus(ps);
}
e = xcb_request_check(ps->c, xcb_ungrab_server(ps->c));
if (e) {
log_error("Failed to ungrad server");
free(e);
}
write_pid(ps);
if (fork && stderr_logger) {
// Remove the stderr logger if we will fork
log_remove_target_tls(stderr_logger);
}
return ps;
}
/**
* Destroy a session.
*
* Does not close the X connection or free the <code>session_t</code>
* structure, though.
*
* @param ps session to destroy
*/
static void
session_destroy(session_t *ps) {
redir_stop(ps);
// Stop listening to events on root window
xcb_change_window_attributes(ps->c, ps->root, XCB_CW_EVENT_MASK,
(const uint32_t[]) { 0 });
#ifdef CONFIG_DBUS
// Kill DBus connection
if (ps->o.dbus) {
assert(ps->dbus_data);
cdbus_destroy(ps);
}
#endif
// Free window linked list
{
win *next = NULL;
win *list = ps->list;
ps->list = NULL;
for (win *w = list; w; w = next) {
next = w->next;
if (w->a.map_state == XCB_MAP_STATE_VIEWABLE && !w->destroying)
win_ev_stop(ps, w);
free_win_res(ps, w);
free(w);
}
}
// Free blacklists
free_wincondlst(&ps->o.shadow_blacklist);
free_wincondlst(&ps->o.fade_blacklist);
free_wincondlst(&ps->o.focus_blacklist);
free_wincondlst(&ps->o.invert_color_list);
free_wincondlst(&ps->o.blur_background_blacklist);
free_wincondlst(&ps->o.opacity_rules);
free_wincondlst(&ps->o.paint_blacklist);
free_wincondlst(&ps->o.unredir_if_possible_blacklist);
// Free tracked atom list
{
latom_t *next = NULL;
for (latom_t *this = ps->track_atom_lst; this; this = next) {
next = this->next;
free(this);
}
ps->track_atom_lst = NULL;
}
// Free ignore linked list
{
ignore_t *next = NULL;
for (ignore_t *ign = ps->ignore_head; ign; ign = next) {
next = ign->next;
free(ign);
}
// Reset head and tail
ps->ignore_head = NULL;
ps->ignore_tail = &ps->ignore_head;
}
// Free tgt_{buffer,picture} and root_picture
if (ps->tgt_buffer.pict == ps->tgt_picture)
ps->tgt_buffer.pict = XCB_NONE;
if (ps->tgt_picture == ps->root_picture)
ps->tgt_picture = XCB_NONE;
else
free_picture(ps->c, &ps->tgt_picture);
free_picture(ps->c, &ps->root_picture);
free_paint(ps, &ps->tgt_buffer);
pixman_region32_fini(&ps->screen_reg);
free(ps->expose_rects);
free(ps->o.write_pid_path);
free(ps->o.logpath);
for (int i = 0; i < MAX_BLUR_PASS; ++i) {
free(ps->o.blur_kerns[i]);
free(ps->blur_kerns_cache[i]);
}
free(ps->o.glx_fshader_win_str);
free_xinerama_info(ps);
deinit_render(ps);
#ifdef CONFIG_VSYNC_DRM
// Close file opened for DRM VSync
if (ps->drm_fd >= 0) {
close(ps->drm_fd);
ps->drm_fd = -1;
}
#endif
// Release overlay window
if (ps->overlay) {
xcb_composite_release_overlay_window(ps->c, ps->overlay);
ps->overlay = XCB_NONE;
}
if (ps->sync_fence) {
xcb_sync_destroy_fence(ps->c, ps->sync_fence);
ps->sync_fence = XCB_NONE;
}
// Free reg_win
if (ps->reg_win) {
xcb_destroy_window(ps->c, ps->reg_win);
ps->reg_win = XCB_NONE;
}
// Flush all events
x_sync(ps->c);
ev_io_stop(ps->loop, &ps->xiow);
#ifdef DEBUG_XRC
// Report about resource leakage
xrc_report_xid();
#endif
// Stop libev event handlers
ev_timer_stop(ps->loop, &ps->unredir_timer);
ev_timer_stop(ps->loop, &ps->fade_timer);
ev_idle_stop(ps->loop, &ps->draw_idle);
ev_prepare_stop(ps->loop, &ps->event_check);
ev_signal_stop(ps->loop, &ps->usr1_signal);
ev_signal_stop(ps->loop, &ps->int_signal);
log_deinit_tls();
}
/**
* Do the actual work.
*
* @param ps current session
*/
static void
session_run(session_t *ps) {
if (ps->o.sw_opti)
ps->paint_tm_offset = get_time_timeval().tv_usec;
// In benchmark mode, we want draw_idle handler to always be active
if (ps->o.benchmark) {
ev_idle_start(ps->loop, &ps->draw_idle);
} else {
// Let's draw our first frame!
queue_redraw(ps);
}
ev_run(ps->loop, 0);
}
/**
* The function that everybody knows.
*/
int
main(int argc, char **argv) {
// Set locale so window names with special characters are interpreted
// correctly
setlocale(LC_ALL, "");
int exit_code;
char *config_file = NULL;
bool all_xerrors = false, need_fork = false;
if (get_early_config(argc, argv, &config_file, &all_xerrors, &need_fork, &exit_code)) {
return exit_code;
}
int pfds[2];
if (need_fork) {
if (pipe2(pfds, O_CLOEXEC)) {
perror("pipe2");
return 1;
}
auto pid = fork();
if (pid < 0) {
perror("fork");
return 1;
}
if (pid > 0) {
// We are the parent
close(pfds[1]);
// We wait for the child to tell us it has finished initialization
// by sending us something via the pipe.
int tmp;
if (read(pfds[0], &tmp, sizeof tmp) <= 0) {
// Failed to read, the child has most likely died
// We can probably waitpid() here.
return 1;
} else {
// We are done
return 0;
}
}
// We are the child
close(pfds[0]);
}
// Main loop
bool quit = false;
Display *dpy = XOpenDisplay(NULL);
if (!dpy) {
log_fatal("Can't open display.");
return 1;
}
XSetEventQueueOwner(dpy, XCBOwnsEventQueue);
do {
ps_g = session_init(argc, argv, dpy, config_file, all_xerrors, need_fork);
if (!ps_g) {
log_fatal("Failed to create new compton session.");
return 1;
}
if (need_fork) {
// Finishing up daemonization
// Close files
if (fclose(stdout) || fclose(stderr) || fclose(stdin)) {
log_fatal("Failed to close standard input/output");
return 1;
}
// Make us the session and process group leader so we don't get killed when
// our parent die.
setsid();
// Notify the parent that we are done. This might cause the parent to quit,
// so only do this after setsid()
int tmp = 1;
write(pfds[1], &tmp, sizeof tmp);
close(pfds[1]);
// We only do this once
need_fork = false;
}
session_run(ps_g);
quit = ps_g->quit;
session_destroy(ps_g);
free(ps_g);
ps_g = NULL;
} while (!quit);
if (dpy) {
XCloseDisplay(dpy);
}
free(config_file);
return 0;
}
// vim: set et sw=2 :
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