1From 2319581d4848e5763abe25059ad43148baa95aaf Mon Sep 17 00:00:00 2001
2From: Jeffy Chen <jeffy.chen@rock-chips.com>
3Date: Tue, 28 Dec 2021 14:06:19 +0800
4Subject: [PATCH 19/33] waylandsink: Support window alpha property
5
6Tested with:
7gst-launch-1.0 videotestsrc ! waylandsink alpha=0.5
8
9Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
10---
11 ext/wayland/gstwaylandsink.c | 32 ++++++++++++++++++++++++++++++++
12 ext/wayland/gstwaylandsink.h |  1 +
13 ext/wayland/wlwindow.c       | 23 ++++++++++++++++-------
14 ext/wayland/wlwindow.h       |  1 +
15 4 files changed, 50 insertions(+), 7 deletions(-)
16
17diff --git a/ext/wayland/gstwaylandsink.c b/ext/wayland/gstwaylandsink.c
18index 1bf4511..ff79ddf 100644
19--- a/ext/wayland/gstwaylandsink.c
20+++ b/ext/wayland/gstwaylandsink.c
21@@ -65,6 +65,7 @@ enum
22   PROP_DISPLAY,
23   PROP_FULLSCREEN,
24   PROP_LAYER,
25+  PROP_ALPHA,
26   PROP_LAST
27 };
28
29@@ -238,6 +239,11 @@ gst_wayland_sink_class_init (GstWaylandSinkClass * klass)
30           GST_TYPE_WL_WINDOW_LAYER, GST_WL_WINDOW_LAYER_NORMAL,
31           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
32
33+  g_object_class_install_property (gobject_class, PROP_ALPHA,
34+      g_param_spec_double ("alpha", "Window alpha",
35+          "Wayland window alpha", 0.0, 1.0, 1.0,
36+          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
37+
38   gst_video_overlay_install_properties (gobject_class, PROP_LAST);
39
40   gst_type_mark_as_plugin_api (GST_TYPE_WAYLAND_VIDEO, 0);
41@@ -251,6 +257,7 @@ gst_wayland_sink_init (GstWaylandSink * sink)
42
43   sink->window_handle = 1;
44   sink->layer = GST_WL_WINDOW_LAYER_NORMAL;
45+  sink->alpha = 1.0;
46 }
47
48 static void
49@@ -277,6 +284,18 @@ gst_wayland_sink_set_layer (GstWaylandSink * sink, GstWlWindowLayer layer)
50   g_mutex_unlock (&sink->render_lock);
51 }
52
53+static void
54+gst_wayland_sink_set_alpha (GstWaylandSink * sink, gdouble alpha)
55+{
56+  if (alpha == sink->alpha)
57+    return;
58+
59+  g_mutex_lock (&sink->render_lock);
60+  sink->alpha = alpha;
61+  gst_wl_window_ensure_alpha (sink->window, alpha);
62+  g_mutex_unlock (&sink->render_lock);
63+}
64+
65 static void
66 gst_wayland_sink_get_property (GObject * object,
67     guint prop_id, GValue * value, GParamSpec * pspec)
68@@ -299,6 +318,11 @@ gst_wayland_sink_get_property (GObject * object,
69       g_value_set_enum (value, sink->layer);
70       GST_OBJECT_UNLOCK (sink);
71       break;
72+    case PROP_ALPHA:
73+      GST_OBJECT_LOCK (sink);
74+      g_value_set_double (value, sink->alpha);
75+      GST_OBJECT_UNLOCK (sink);
76+      break;
77     default:
78       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
79       break;
80@@ -327,6 +351,11 @@ gst_wayland_sink_set_property (GObject * object,
81       gst_wayland_sink_set_layer (sink, g_value_get_enum (value));
82       GST_OBJECT_UNLOCK (sink);
83       break;
84+    case PROP_ALPHA:
85+      GST_OBJECT_LOCK (sink);
86+      gst_wayland_sink_set_alpha (sink, g_value_get_double (value));
87+      GST_OBJECT_UNLOCK (sink);
88+      break;
89     default:
90       if (!gst_video_overlay_set_property (object, PROP_LAST, prop_id, value))
91         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
92@@ -783,6 +812,8 @@ gst_wayland_sink_show_frame (GstVideoSink * vsink, GstBuffer * buffer)
93       sink->window = gst_wl_window_new_toplevel (sink->display,
94           &sink->video_info, sink->fullscreen, sink->layer,
95           &sink->render_lock, &sink->render_rectangle);
96+      gst_wl_window_ensure_alpha (sink->window, sink->alpha);
97+
98       g_signal_connect_object (sink->window, "closed",
99           G_CALLBACK (on_window_closed), sink, 0);
100     }
101@@ -1035,6 +1066,7 @@ gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay, guintptr handle)
102       } else {
103         sink->window = gst_wl_window_new_in_surface (sink->display, surface,
104             &sink->render_lock);
105+        gst_wl_window_ensure_alpha (sink->window, sink->alpha);
106
107         if (sink->last_buffer) {
108           /* Resend video info to force resize video surface */
109diff --git a/ext/wayland/gstwaylandsink.h b/ext/wayland/gstwaylandsink.h
110index 3adddf2..f798969 100644
111--- a/ext/wayland/gstwaylandsink.h
112+++ b/ext/wayland/gstwaylandsink.h
113@@ -63,6 +63,7 @@ struct _GstWaylandSink
114   GstVideoInfo video_info;
115   gboolean fullscreen;
116   GstWlWindowLayer layer;
117+  gdouble alpha;
118
119   gchar *display_name;
120
121diff --git a/ext/wayland/wlwindow.c b/ext/wayland/wlwindow.c
122index 7f7f3b6..58e65dd 100644
123--- a/ext/wayland/wlwindow.c
124+++ b/ext/wayland/wlwindow.c
125@@ -24,6 +24,7 @@
126 #include <config.h>
127 #endif
128
129+#include <stdio.h>
130 #include <stdlib.h>
131
132 #include "wlwindow.h"
133@@ -235,19 +236,25 @@ gst_wl_window_new_internal (GstWlDisplay * display, GMutex * render_lock)
134 }
135
136 static void
137-gst_wl_window_set_flags (GstWlWindow * window, const char *flags)
138+gst_wl_window_set_config (GstWlWindow * window, const char *config)
139 {
140-  /* HACK: set window flags through title */
141-  char s[128] = "flags=";
142-  strcat (s, flags);
143-
144+  /* HACK: set window config through title */
145   if (!window)
146     return;
147
148   if (window->xdg_toplevel)
149-    xdg_toplevel_set_title (window->xdg_toplevel, s);
150+    xdg_toplevel_set_title (window->xdg_toplevel, config);
151   else if (window->wl_shell_surface)
152-    wl_shell_surface_set_title (window->wl_shell_surface, s);
153+    wl_shell_surface_set_title (window->wl_shell_surface, config);
154+}
155+
156+void
157+gst_wl_window_ensure_alpha (GstWlWindow * window, gdouble alpha)
158+{
159+  char s[128];
160+
161+  snprintf (s, sizeof (s), "attrs=alpha:%f;", alpha);
162+  gst_wl_window_set_config (window, s);
163 }
164
165 void
166@@ -268,6 +275,8 @@ gst_wl_window_ensure_layer (GstWlWindow * window, GstWlWindowLayer layer)
167     default:
168       return;
169   }
170+
171+  gst_wl_window_set_config (window, s);
172 }
173
174 void
175diff --git a/ext/wayland/wlwindow.h b/ext/wayland/wlwindow.h
176index 97ea79e..6fb8285 100644
177--- a/ext/wayland/wlwindow.h
178+++ b/ext/wayland/wlwindow.h
179@@ -87,6 +87,7 @@ typedef enum
180   GST_WL_WINDOW_LAYER_BOTTOM = 2,
181 } GstWlWindowLayer;
182
183+void gst_wl_window_ensure_alpha (GstWlWindow * window, gdouble alpha);
184 void gst_wl_window_ensure_layer (GstWlWindow * window,
185         GstWlWindowLayer layer);
186 void gst_wl_window_ensure_fullscreen (GstWlWindow * window,
187--
1882.20.1
189
190