chjj/compton #64: Add --inactive-shadow-opacity.

compton-inactive-shadow-opacity.patch

diff --git a/src/compton.c b/src/compton.c
index 6e2784f..b5b1fa9 100644
--- a/src/compton.c
+++ b/src/compton.c
@@ -1297,10 +1297,13 @@ paint_preprocess(session_t *ps, win *list) {
       w->frame_alpha_pict = get_alpha_pict_d(ps, w->frame_opacity);
 
       // Calculate shadow opacity
-      if (w->frame_opacity)
-        w->shadow_opacity = ps->o.shadow_opacity * w->frame_opacity;
-      else
-        w->shadow_opacity = ps->o.shadow_opacity * get_opacity_percent(w);
+      {
+        double shadow_opacity = (w->focused ? ps->o.shadow_opacity: ps->o.inactive_shadow_opacity);
+        if (w->frame_opacity)
+          w->shadow_opacity = shadow_opacity * w->frame_opacity;
+        else
+          w->shadow_opacity = shadow_opacity * get_opacity_percent(w);
+      }
 
       // Rebuild shadow_pict if necessary
       if (w->flags & WFLAG_SIZE_CHANGE)
@@ -3826,6 +3829,7 @@ get_cfg(session_t *ps, int argc, char *const *argv) {
     { "use-ewmh-active-win", no_argument, NULL, 276 },
     { "respect-prop-shadow", no_argument, NULL, 277 },
     { "unredir-if-possible", no_argument, NULL, 278 },
+    { "inactive-shadow-opacity", required_argument, NULL, 14352 },
     // Must terminate with a NULL entry
     { NULL, 0, NULL, 0 },
   };
@@ -4027,6 +4031,10 @@ get_cfg(session_t *ps, int argc, char *const *argv) {
         // --unredir-if-possible
         ps->o.unredir_if_possible = true;
         break;
+      case 14352:
+        // --inactive-shadow-opacity
+        ps->o.inactive_shadow_opacity = atof(optarg);
+        break;
       default:
         usage();
     }
@@ -4044,7 +4052,12 @@ get_cfg(session_t *ps, int argc, char *const *argv) {
   ps->o.shadow_blue = normalize_d(ps->o.shadow_blue);
   ps->o.inactive_dim = normalize_d(ps->o.inactive_dim);
   ps->o.frame_opacity = normalize_d(ps->o.frame_opacity);
+
   ps->o.shadow_opacity = normalize_d(ps->o.shadow_opacity);
+  ps->o.inactive_shadow_opacity = normalize_d(ps->o.inactive_shadow_opacity);
+  if (!ps->o.inactive_shadow_opacity)
+    ps->o.inactive_shadow_opacity = ps->o.shadow_opacity;
+
   cfgtmp.menu_opacity = normalize_d(cfgtmp.menu_opacity);
   ps->o.refresh_rate = normalize_i_range(ps->o.refresh_rate, 0, 300);
   ps->o.alpha_step = normalize_d_range(ps->o.alpha_step, 0.01, 1.0);
@@ -4068,7 +4081,8 @@ get_cfg(session_t *ps, int argc, char *const *argv) {
   // Other variables determined by options
 
   // Determine whether we need to track focus changes
-  if (ps->o.inactive_opacity || ps->o.inactive_dim) {
+  if (ps->o.inactive_opacity || ps->o.inactive_dim
+      || ps->o.shadow_opacity != ps->o.inactive_shadow_opacity) {
     ps->o.track_focus = true;
   }
 
@@ -4539,6 +4553,7 @@ session_init(session_t *ps_old, int argc, char **argv) {
       .shadow_blacklist = NULL,
       .shadow_ignore_shaped = false,
       .respect_prop_shadow = false,
+      .inactive_shadow_opacity = 0.0,
 
       .wintype_fade = { false },
       .fade_in_step = 0.028 * OPAQUE,
diff --git a/src/compton.h b/src/compton.h
index ed32500..4cbff9a 100644
--- a/src/compton.h
+++ b/src/compton.h
@@ -258,6 +258,8 @@ typedef struct {
   bool shadow_ignore_shaped;
   /// Whether to respect _COMPTON_SHADOW.
   bool respect_prop_shadow;
+  /// Shadow opacity for inactive windows.
+  double inactive_shadow_opacity;
 
   // === Fading ===
   bool wintype_fade[NUM_WINTYPES];