Remove the clear-shadow option

Shadows attached to ARGB/transparent windows are always cleared now.

man/compton.1.asciidoc

@@ -59,9 +59,6 @@ OPTIONS
 *-C*, *--no-dock-shadow*::
 	Avoid drawing shadows on dock/panel windows.
 
-*-z*, *--clear-shadow*::
-	Zero the part of the shadow's mask behind the window. Note this may not work properly on ARGB windows with fully transparent areas.
-
 *-f*, *--fading*::
 	Fade windows in/out when opening/closing and when opacity changes, unless *--no-fading-openclose* is used.
 

src/common.h

@@ -625,7 +625,6 @@ typedef struct _options_t {
   int shadow_radius;
   int shadow_offset_x, shadow_offset_y;
   double shadow_opacity;
-  bool clear_shadow;
   /// Geometry of a region in which shadow is not painted on.
   geometry_t shadow_exclude_reg_geom;
   /// Shadow blacklist. A linked list of conditions.

src/compton.c

@@ -1808,7 +1808,7 @@ paint_all(session_t *ps, XserverRegion region, XserverRegion region_real, win *t
 
       // Clear the shadow here instead of in make_shadow() for saving GPU
       // power and handling shaped windows
-      if (ps->o.clear_shadow && w->border_size)
+      if (w->mode != WMODE_SOLID && w->border_size)
         XFixesSubtractRegion(ps->dpy, reg_paint, reg_paint, w->border_size);
 
 #ifdef CONFIG_XINERAMA
@@ -4037,7 +4037,9 @@ get_cfg(session_t *ps, int argc, char *const *argv, bool first_pass) {
       case 'e':
         ps->o.frame_opacity = atof(optarg);
         break;
-      P_CASEBOOL('z', clear_shadow);
+      case 'z':
+        printf_errf("(): clear-shadow is removed, shadows are automatically cleared now.");
+        break;
       case 'n':
       case 'a':
       case 's':
@@ -5159,7 +5161,6 @@ session_init(session_t *ps_old, int argc, char **argv) {
       .shadow_offset_x = -15,
       .shadow_offset_y = -15,
       .shadow_opacity = .75,
-      .clear_shadow = false,
       .shadow_blacklist = NULL,
       .shadow_ignore_shaped = false,
       .respect_prop_shadow = false,

src/config_libconfig.c

@@ -245,8 +245,6 @@ parse_config(session_t *ps, struct options_tmp *pcfgtmp) {
     ps->o.active_opacity = normalize_d(dval) * OPAQUE;
   // -e (frame_opacity)
   config_lookup_float(&cfg, "frame-opacity", &ps->o.frame_opacity);
-  // -z (clear_shadow)
-  lcfg_lookup_bool(&cfg, "clear-shadow", &ps->o.clear_shadow);
   // -c (shadow_enable)
   if (config_lookup_bool(&cfg, "shadow", &ival) && ival)
     wintype_arr_enable(ps->o.wintype_shadow);

src/dbus.c

@@ -888,6 +888,12 @@ cdbus_process_opts_get(session_t *ps, DBusMessage *msg) {
     return true; \
   }
 
+#define cdbus_m_opts_get_stub(tgt, apdarg_func, ret) \
+  if (!strcmp(MSTR(tgt), target)) { \
+    apdarg_func(ps, msg, ret); \
+    return true; \
+  }
+
   // version
   if (!strcmp("version", target)) {
     cdbus_reply_string(ps, msg, COMPTON_VERSION);
@@ -948,7 +954,7 @@ cdbus_process_opts_get(session_t *ps, DBusMessage *msg) {
   cdbus_m_opts_get_do(shadow_offset_x, cdbus_reply_int32);
   cdbus_m_opts_get_do(shadow_offset_y, cdbus_reply_int32);
   cdbus_m_opts_get_do(shadow_opacity, cdbus_reply_double);
-  cdbus_m_opts_get_do(clear_shadow, cdbus_reply_bool);
+  cdbus_m_opts_get_stub(clear_shadow, cdbus_reply_bool, true);
   cdbus_m_opts_get_do(xinerama_shadow_crop, cdbus_reply_bool);
 
   cdbus_m_opts_get_do(fade_delta, cdbus_reply_int32);
@@ -1054,16 +1060,8 @@ cdbus_process_opts_set(session_t *ps, DBusMessage *msg) {
   }
 
   // clear_shadow
-  if (!strcmp("clear_shadow", target)) {
+  if (!strcmp("clear_shadow", target))
-    dbus_bool_t val = FALSE;
-    if (!cdbus_msg_get_arg(msg, 1, DBUS_TYPE_BOOLEAN, &val))
-      return false;
-    if (ps->o.clear_shadow != val) {
-      ps->o.clear_shadow = val;
-      force_repaint(ps);
-    }
     goto cdbus_process_opts_set_success;
-  }
 
   // track_focus
   if (!strcmp("track_focus", target)) {