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Feature: #27: Detect shaped windows and disable shadow on them

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- Optionally detect shaped windows using X Shape extension and disable
  shadow on them with --shadow-ignore-shaped.

- Some windows are bounding-shaped just to support rounded corners, like
  Chromium windows (when system titlebar is disabled in its settings).
  Add --detect-rounded-corners to treat them as non-shaped windows (thus
  enable shadow on them). The algorithm I use is not perfect and wrong
  detection results are pretty possible to appear.

- Many windows don't use X Shape extensions to add shapes but use ARGB
  background instead. These windows could only be blacklisted with
  --shadow-blacklist.

- Rename a few functions. Code clean up.
This commit is contained in:
Richard Grenville
2012-10-01 10:34:40 +08:00
parent 8d7d6405b6
commit 2f0417cd74
3 changed files with 194 additions and 64 deletions
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128
src/compton.c
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@@ -114,31 +114,37 @@ unsigned long fade_time;
static options_t opts = {
.display = NULL,
.mark_wmwin_focused = False,
.mark_ovredir_focused = False,
.fork_after_register = False,
.synchronize = False,
.detect_rounded_corners = False,
.wintype_shadow = { False },
.shadow_red = 0.0,
.shadow_green = 0.0,
.shadow_blue = 0.0,
.shadow_radius = 12,
.shadow_offset_x = -15,
.shadow_offset_y = -15,
.shadow_opacity = .75,
.clear_shadow = False,
.shadow_blacklist = NULL,
.shadow_ignore_shaped = False,
.wintype_fade = { False },
.fade_in_step = 0.028 * OPAQUE,
.fade_out_step = 0.03 * OPAQUE,
.fade_delta = 10,
.no_fading_openclose = False,
.clear_shadow = False,
.fade_blacklist = NULL,
.wintype_opacity = { 0.0 },
.inactive_opacity = 0,
.inactive_opacity_override = False,
.frame_opacity = 0.0,
.inactive_dim = 0.0,
.mark_wmwin_focused = False,
.mark_ovredir_focused = False,
.shadow_blacklist = NULL,
.fade_blacklist = NULL,
.fork_after_register = False,
.shadow_red = 0.0,
.shadow_green = 0.0,
.shadow_blue = 0.0,
.wintype_opacity = { 0.0 },
.wintype_shadow = { False },
.wintype_fade = { False },
.synchronize = False,
.track_focus = False,
.track_wdata = False,
};
@@ -655,6 +661,48 @@ should_ignore(Display *dpy, unsigned long sequence) {
* Windows
*/
/**
* Check if a window has rounded corners.
*/
static void
win_rounded_corners(Display *dpy, win *w) {
if (!w->bounding_shaped)
return;
// Fetch its bounding region
if (!w->border_size)
w->border_size = border_size(dpy, w);
// Quit if border_size() returns None
if (!w->border_size)
return;
// Determine the minimum width/height of a rectangle that could mark
// a window as having rounded corners
unsigned short minwidth = max_i(w->widthb * (1 - ROUNDED_PERCENT),
w->widthb - ROUNDED_PIXELS);
unsigned short minheight = max_i(w->heightb * (1 - ROUNDED_PERCENT),
w->heightb - ROUNDED_PIXELS);
// Get the rectangles in the bounding region
int nrects = 0, i;
XRectangle *rects = XFixesFetchRegion(dpy, w->border_size, &nrects);
if (!rects)
return;
// Look for a rectangle large enough for this window be considered
// having rounded corners
for (i = 0; i < nrects; ++i)
if (rects[i].width >= minwidth && rects[i].height >= minheight) {
w->rounded_corners = True;
XFree(rects);
return;
}
w->rounded_corners = False;
XFree(rects);
}
/**
* Match a window against a single window condition.
*
@@ -1133,7 +1181,7 @@ border_size(Display *dpy, win *w) {
static Window
find_client_win(Display *dpy, Window w) {
if (win_has_attr(dpy, w, client_atom)) {
if (wid_has_attr(dpy, w, client_atom)) {
return w;
}
@@ -1142,7 +1190,7 @@ find_client_win(Display *dpy, Window w) {
unsigned int i;
Window ret = 0;
if (!win_get_children(dpy, w, &children, &nchildren)) {
if (!wid_get_children(dpy, w, &children, &nchildren)) {
return 0;
}
@@ -1539,7 +1587,7 @@ determine_wintype(Display *dpy, Window w) {
type = get_wintype_prop(dpy, w);
if (type != WINTYPE_UNKNOWN) return type;
if (!win_get_children(dpy, w, &children, &nchildren))
if (!wid_get_children(dpy, w, &children, &nchildren))
return WINTYPE_UNKNOWN;
for (i = 0; i < nchildren; i++) {
@@ -1599,6 +1647,13 @@ map_win(Display *dpy, Window id,
w->id, WINTYPES[w->window_type]);
#endif
// Detect if the window is shaped or has rounded corners
if (opts.shadow_ignore_shaped) {
w->bounding_shaped = wid_bounding_shaped(dpy, w->id);
if (w->bounding_shaped && opts.detect_rounded_corners)
win_rounded_corners(dpy, w);
}
// Get window name and class if we are tracking them
if (opts.track_wdata) {
win_get_name(dpy, w);
@@ -1621,7 +1676,8 @@ map_win(Display *dpy, Window id,
w->focused = True;
}
// Window type change could affect shadow and fade
// Window type change and bounding shape state change could affect
// shadow
determine_shadow(dpy, w);
// Determine mode here just in case the colormap changes
@@ -1630,6 +1686,7 @@ map_win(Display *dpy, Window id,
// Fading in
calc_opacity(dpy, w, True);
// Set fading state
if (opts.no_fading_openclose) {
set_fade_callback(dpy, w, finish_map_win, True);
// Must be set after we execute the old fade callback, in case we
@@ -1849,7 +1906,9 @@ determine_shadow(Display *dpy, win *w) {
Bool shadow_old = w->shadow;
w->shadow = (opts.wintype_shadow[w->window_type]
&& !win_match(w, opts.shadow_blacklist, &w->cache_sblst));
&& !win_match(w, opts.shadow_blacklist, &w->cache_sblst)
&& !(opts.shadow_ignore_shaped && w->bounding_shaped
&& !w->rounded_corners));
// Window extents need update on shadow state change
if (w->shadow != shadow_old) {
@@ -1964,6 +2023,8 @@ add_win(Display *dpy, Window id, Window prev, Bool override_redirect) {
new->class_general = NULL;
new->cache_sblst = NULL;
new->cache_fblst = NULL;
new->bounding_shaped = False;
new->rounded_corners = False;
new->border_size = None;
new->extents = None;
@@ -2782,6 +2843,16 @@ ev_shape_notify(XShapeEvent *ev) {
// Mark the new border_size as damaged
add_damage(dpy, copy_region(dpy, w->border_size));
}
// Redo bounding shape detection and rounded corner detection
if (opts.shadow_ignore_shaped) {
w->bounding_shaped = wid_bounding_shaped(dpy, w->id);
if (w->bounding_shaped && opts.detect_rounded_corners)
win_rounded_corners(dpy, w);
// Shadow state could be changed
determine_shadow(dpy, w);
}
}
inline static void
@@ -2935,6 +3006,11 @@ usage(void) {
" Mark over-redirect windows as active.\n"
"--no-fading-openclose\n"
" Do not fade on window open/close.\n"
"--shadow-ignore-shaped\n"
" Do not paint shadows on shaped windows.\n"
"--detect-rounded-corners\n"
" Try to detect windows with rounded corners and don't consider\n"
" them shaped windows.\n"
"\n"
"Format of a condition:\n"
"\n"
@@ -3189,6 +3265,12 @@ parse_config(char *cpath, struct options_tmp *pcfgtmp) {
// --mark-ovredir-focused
lcfg_lookup_bool(&cfg, "mark-ovredir-focused",
&opts.mark_ovredir_focused);
// --shadow-ignore-shaped
lcfg_lookup_bool(&cfg, "shadow-ignore-shaped",
&opts.shadow_ignore_shaped);
// --detect-rounded-corners
lcfg_lookup_bool(&cfg, "detect-rounded-corners",
&opts.detect_rounded_corners);
// --shadow-exclude
{
config_setting_t *setting =
@@ -3249,6 +3331,8 @@ get_cfg(int argc, char *const *argv) {
{ "shadow-exclude", required_argument, NULL, 263 },
{ "mark-ovredir-focused", no_argument, NULL, 264 },
{ "no-fading-openclose", no_argument, NULL, 265 },
{ "shadow-ignore-shaped", no_argument, NULL, 266 },
{ "detect-rounded-corners", no_argument, NULL, 267 },
// Must terminate with a NULL entry
{ NULL, 0, NULL, 0 },
};
@@ -3395,6 +3479,14 @@ get_cfg(int argc, char *const *argv) {
// --no-fading-openclose
opts.no_fading_openclose = True;
break;
case 266:
// --shadow-ignore-shaped
opts.shadow_ignore_shaped = True;
break;
case 267:
// --detect-rounded-corners
opts.detect_rounded_corners = True;
break;
default:
usage();
break;