HYL_OK3568_LINUX/buildroot/package/gstreamer1/gst1-plugins-bad/0020-waylandsink-Support-window-alpha-property.patch

From 094b728bb0ab22c917928d334358b4491b04b163 Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Tue, 28 Dec 2021 14:06:19 +0800
Subject: [PATCH 20/41] waylandsink: Support window alpha property

Tested with:
gst-launch-1.0 videotestsrc ! waylandsink alpha=0.5

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 ext/wayland/gstwaylandsink.c       | 31 ++++++++++++++++++++++++++++++
 ext/wayland/gstwaylandsink.h       |  1 +
 gst-libs/gst/wayland/gstwlwindow.c | 10 ++++++++++
 gst-libs/gst/wayland/gstwlwindow.h |  3 +++
 4 files changed, 45 insertions(+)

diff --git a/ext/wayland/gstwaylandsink.c b/ext/wayland/gstwaylandsink.c
index 56a6849..008c774 100644
--- a/ext/wayland/gstwaylandsink.c
+++ b/ext/wayland/gstwaylandsink.c
@@ -62,6 +62,7 @@ enum
   PROP_FULLSCREEN,
   PROP_ROTATE_METHOD,
   PROP_LAYER,
+  PROP_ALPHA,
   PROP_LAST
 };
 
@@ -202,6 +203,11 @@ gst_wayland_sink_class_init (GstWaylandSinkClass * klass)
           GST_TYPE_WL_WINDOW_LAYER, GST_WL_WINDOW_LAYER_NORMAL,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 
+  g_object_class_install_property (gobject_class, PROP_ALPHA,
+      g_param_spec_double ("alpha", "Window alpha",
+          "Wayland window alpha", 0.0, 1.0, 1.0,
+          G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
+
  /**
   * waylandsink:render-rectangle:
   *
@@ -221,6 +227,7 @@ gst_wayland_sink_init (GstWaylandSink * self)
 
   self->window_handle = 1;
   self->layer = GST_WL_WINDOW_LAYER_NORMAL;
+  self->alpha = 1.0;
 }
 
 static void
@@ -284,6 +291,18 @@ gst_wayland_sink_set_layer (GstWaylandSink * self, GstWlWindowLayer layer)
   g_mutex_unlock (&self->render_lock);
 }
 
+static void
+gst_wayland_sink_set_alpha (GstWaylandSink * self, gdouble alpha)
+{
+  if (alpha == self->alpha)
+    return;
+
+  g_mutex_lock (&self->render_lock);
+  self->alpha = alpha;
+  gst_wl_window_ensure_alpha (self->window, alpha);
+  g_mutex_unlock (&self->render_lock);
+}
+
 static void
 gst_wayland_sink_get_property (GObject * object,
     guint prop_id, GValue * value, GParamSpec * pspec)
@@ -311,6 +330,11 @@ gst_wayland_sink_get_property (GObject * object,
       g_value_set_enum (value, self->layer);
       GST_OBJECT_UNLOCK (self);
       break;
+    case PROP_ALPHA:
+      GST_OBJECT_LOCK (self);
+      g_value_set_double (value, self->alpha);
+      GST_OBJECT_UNLOCK (self);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -343,6 +367,11 @@ gst_wayland_sink_set_property (GObject * object,
       gst_wayland_sink_set_layer (self, g_value_get_enum (value));
       GST_OBJECT_UNLOCK (self);
       break;
+    case PROP_ALPHA:
+      GST_OBJECT_LOCK (self);
+      gst_wayland_sink_set_alpha (self, g_value_get_double (value));
+      GST_OBJECT_UNLOCK (self);
+      break;
     default:
       if (!gst_video_overlay_set_property (object, PROP_LAST, prop_id, value))
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -827,6 +856,7 @@ gst_wayland_sink_show_frame (GstVideoSink * vsink, GstBuffer * buffer)
           G_CALLBACK (on_window_closed), self, 0);
       gst_wl_window_set_rotate_method (self->window,
           self->current_rotate_method);
+      gst_wl_window_ensure_alpha (self->window, self->alpha);
     }
   }
 
@@ -1085,6 +1115,7 @@ gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay, guintptr handle)
             &self->render_lock);
         gst_wl_window_set_rotate_method (self->window,
             self->current_rotate_method);
+        gst_wl_window_ensure_alpha (self->window, self->alpha);
 
         if (self->last_buffer) {
           /* Resend video info to force resize video surface */
diff --git a/ext/wayland/gstwaylandsink.h b/ext/wayland/gstwaylandsink.h
index a417788..0339ef7 100644
--- a/ext/wayland/gstwaylandsink.h
+++ b/ext/wayland/gstwaylandsink.h
@@ -58,6 +58,7 @@ struct _GstWaylandSink
   GstVideoInfo video_info;
   gboolean fullscreen;
   GstWlWindowLayer layer;
+  gdouble alpha;
 
   gchar *display_name;
 
diff --git a/gst-libs/gst/wayland/gstwlwindow.c b/gst-libs/gst/wayland/gstwlwindow.c
index fed1c97..f470338 100644
--- a/gst-libs/gst/wayland/gstwlwindow.c
+++ b/gst-libs/gst/wayland/gstwlwindow.c
@@ -24,6 +24,7 @@
 #include <config.h>
 #endif
 
+#include <stdio.h>
 #include <stdlib.h>
 
 #include "gstwlwindow.h"
@@ -267,6 +268,15 @@ gst_wl_window_set_config (GstWlWindow * self, const char *config)
   xdg_toplevel_set_title (priv->xdg_toplevel, config);
 }
 
+void
+gst_wl_window_ensure_alpha (GstWlWindow * window, gdouble alpha)
+{
+  char s[128];
+
+  snprintf (s, sizeof (s), "attrs=alpha:%f;", alpha);
+  gst_wl_window_set_config (window, s);
+}
+
 void
 gst_wl_window_ensure_layer (GstWlWindow * self, GstWlWindowLayer layer)
 {
diff --git a/gst-libs/gst/wayland/gstwlwindow.h b/gst-libs/gst/wayland/gstwlwindow.h
index a0b05c3..2672e0f 100644
--- a/gst-libs/gst/wayland/gstwlwindow.h
+++ b/gst-libs/gst/wayland/gstwlwindow.h
@@ -40,6 +40,9 @@ struct _GstWlWindow
   GObject parent_instance;
 };
 
+GST_WL_API
+void gst_wl_window_ensure_alpha (GstWlWindow * self, gdouble alpha);
+
 GST_WL_API
 void gst_wl_window_ensure_layer (GstWlWindow * self,
         GstWlWindowLayer layer);
-- 
2.20.1