xref: /OK3568_Linux_fs/yocto/meta-rockchip/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad_1.22/0037-waylandsink-Support-transparent-video.patch (revision 4882a59341e53eb6f0b4789bf948001014eff981)

From 347a0ce52357d2f199724b18b571516a95d73029 Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Fri, 5 Aug 2022 11:39:00 +0800
Subject: [PATCH 37/41] waylandsink: Support transparent video

Tested with transparent png picture.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 gst-libs/gst/wayland/gstwlwindow.c | 36 +++++++++++++++++++++---------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/gst-libs/gst/wayland/gstwlwindow.c b/gst-libs/gst/wayland/gstwlwindow.c
index 21cd476..36afd3f 100644
--- a/gst-libs/gst/wayland/gstwlwindow.c
+++ b/gst-libs/gst/wayland/gstwlwindow.c
@@ -69,6 +69,9 @@ typedef struct _GstWlWindowPrivate
   gint crop_x, crop_y, crop_w, crop_h;
   gboolean crop_dirty;

+  gboolean video_opaque;
+  gboolean area_opaque;
+
   enum wl_output_transform buffer_transform;

   /* when this is not set both the area_surface and the video_surface are not
@@ -628,20 +631,23 @@ gst_wl_window_resize_video_surface (GstWlWindow * self, gboolean commit)
 }

 static void
-gst_wl_window_set_opaque (GstWlWindow * self, const GstVideoInfo * info)
+gst_wl_window_set_opaque (GstWlWindow * self)
 {
   GstWlWindowPrivate *priv = gst_wl_window_get_instance_private (self);
   struct wl_compositor *compositor;
   struct wl_region *region;

-  /* Set area opaque */
   compositor = gst_wl_display_get_compositor (priv->display);
-  region = wl_compositor_create_region (compositor);
-  wl_region_add (region, 0, 0, G_MAXINT32, G_MAXINT32);
-  wl_surface_set_opaque_region (priv->area_surface, region);
-  wl_region_destroy (region);
+
+  if (priv->area_opaque) {
+    /* Set area opaque */
+    region = wl_compositor_create_region (compositor);
+    wl_region_add (region, 0, 0, G_MAXINT32, G_MAXINT32);
+    wl_surface_set_opaque_region (priv->area_surface, region);
+    wl_region_destroy (region);
+  }

-  if (!GST_VIDEO_INFO_HAS_ALPHA (info)) {
+  if (priv->video_opaque) {
     /* Set video opaque */
     region = wl_compositor_create_region (compositor);
     wl_region_add (region, 0, 0, G_MAXINT32, G_MAXINT32);
@@ -659,10 +665,15 @@ gst_wl_window_render (GstWlWindow * self, GstWlBuffer * buffer,
   if (G_UNLIKELY (info)) {
     priv->video_width = info->width;
     priv->video_height = info->height;
+    priv->video_opaque = !GST_VIDEO_INFO_HAS_ALPHA (info);
+    priv->area_opaque = priv->video_opaque;
+
+    if (g_getenv ("WAYLANDSINK_FORCE_OPAQUE"))
+      priv->area_opaque = priv->video_opaque = TRUE;

     wl_subsurface_set_sync (priv->video_subsurface);
     gst_wl_window_resize_video_surface (self, FALSE);
-    gst_wl_window_set_opaque (self, info);
+    gst_wl_window_set_opaque (self);
   } else if (priv->crop_dirty) {
     gst_wl_window_resize_video_surface (self, FALSE);
   }
@@ -730,8 +741,13 @@ gst_wl_window_update_borders (GstWlWindow * self)
     height = priv->render_rectangle.h;
   }

-  /* we want WL_SHM_FORMAT_XRGB8888 */
-  format = GST_VIDEO_FORMAT_BGRx;
+  if (priv->area_opaque) {
+    /* we want WL_SHM_FORMAT_XRGB8888 */
+    format = GST_VIDEO_FORMAT_BGRx;
+  } else {
+    /* we want WL_SHM_FORMAT_ARGB8888 */
+    format = GST_VIDEO_FORMAT_BGRA;
+  }

   /* draw the area_subsurface */
   gst_video_info_set_format (&info, format, width, height);
--
2.20.1