From be6ba9eb1e28cc339e691f02c7c1cb6ae627d87a Mon Sep 17 00:00:00 2001
From: Olivier Fourdan <ofourdan@redhat.com>
Date: Wed, 5 Dec 2018 08:48:41 +0100
Subject: [PATCH 05/12] screen-cast: Add screen-cast-window interface
Typically, to stream the content of a window, we need a way to copy the
content of its window-actor into a buffer, transform relative input
coordinates to relative position within the window-actor and a mean to
get the window bounds within the buffer.
For this purpose, add a new GType interface `MetaScreenCastWindow` with
the methods needed for screen-cast window mode:
* meta_screen_cast_window_get_buffer_bounds()
* meta_screen_cast_window_get_frame_bounds()
* meta_screen_cast_window_transform_relative_position()
* meta_screen_cast_window_capture_into()
This interface is meant to be implemented by `MetaWindowActor` which has
access to all the necessary bits to implement them.
https://gitlab.gnome.org/GNOME/mutter/merge_requests/306
(cherry picked from commit 20c9ca25c01a9160d4a2ddfad29b48eb86a9142a)
---
src/Makefile.am | 2 +
src/backends/meta-screen-cast-window.c | 71 ++++++++++++++++++++++++
src/backends/meta-screen-cast-window.h | 74 ++++++++++++++++++++++++++
3 files changed, 147 insertions(+)
create mode 100644 src/backends/meta-screen-cast-window.c
create mode 100644 src/backends/meta-screen-cast-window.h
diff --git a/src/Makefile.am b/src/Makefile.am
index bd879f2..93586a2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -159,6 +159,8 @@ libmutter_@LIBMUTTER_API_VERSION@_la_SOURCES = \
backends/meta-output.h \
backends/meta-pointer-constraint.c \
backends/meta-pointer-constraint.h \
+ backends/meta-screen-cast-window.c \
+ backends/meta-screen-cast-window.h \
backends/meta-settings.c \
backends/meta-settings-private.h \
backends/meta-stage-private.h \
diff --git a/src/backends/meta-screen-cast-window.c b/src/backends/meta-screen-cast-window.c
new file mode 100644
index 0000000..21629a0
--- /dev/null
+++ b/src/backends/meta-screen-cast-window.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2018 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include "backends/meta-screen-cast-window.h"
+
+G_DEFINE_INTERFACE (MetaScreenCastWindow, meta_screen_cast_window, G_TYPE_OBJECT)
+
+static void
+meta_screen_cast_window_default_init (MetaScreenCastWindowInterface *iface)
+{
+}
+
+void
+meta_screen_cast_window_get_buffer_bounds (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds)
+{
+ META_SCREEN_CAST_WINDOW_GET_IFACE (screen_cast_window)->get_buffer_bounds (screen_cast_window,
+ bounds);
+}
+
+void
+meta_screen_cast_window_get_frame_bounds (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds)
+{
+ META_SCREEN_CAST_WINDOW_GET_IFACE (screen_cast_window)->get_frame_bounds (screen_cast_window,
+ bounds);
+}
+
+void
+meta_screen_cast_window_transform_relative_position (MetaScreenCastWindow *screen_cast_window,
+ double x,
+ double y,
+ double *x_out,
+ double *y_out)
+{
+ META_SCREEN_CAST_WINDOW_GET_IFACE (screen_cast_window)->transform_relative_position (screen_cast_window,
+ x,
+ y,
+ x_out,
+ y_out);
+}
+
+
+void
+meta_screen_cast_window_capture_into (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds,
+ uint8_t *data)
+{
+ META_SCREEN_CAST_WINDOW_GET_IFACE (screen_cast_window)->capture_into (screen_cast_window,
+ bounds,
+ data);
+}
diff --git a/src/backends/meta-screen-cast-window.h b/src/backends/meta-screen-cast-window.h
new file mode 100644
index 0000000..e023d3e
--- /dev/null
+++ b/src/backends/meta-screen-cast-window.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2018 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#ifndef META_SCREEN_CAST_WINDOW_H
+#define META_SCREEN_CAST_WINDOW_H
+
+#include <stdint.h>
+#include <glib-object.h>
+
+#include "meta/boxes.h"
+
+G_BEGIN_DECLS
+
+#define META_TYPE_SCREEN_CAST_WINDOW (meta_screen_cast_window_get_type ())
+G_DECLARE_INTERFACE (MetaScreenCastWindow, meta_screen_cast_window,
+ META, SCREEN_CAST_WINDOW, GObject)
+
+struct _MetaScreenCastWindowInterface
+{
+ GTypeInterface parent_iface;
+
+ void (*get_buffer_bounds) (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds);
+
+ void (*get_frame_bounds) (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds);
+
+ void (*transform_relative_position) (MetaScreenCastWindow *screen_cast_window,
+ double x,
+ double y,
+ double *x_out,
+ double *y_out);
+
+ void (*capture_into) (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds,
+ uint8_t *data);
+};
+
+void meta_screen_cast_window_get_buffer_bounds (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds);
+
+void meta_screen_cast_window_get_frame_bounds (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds);
+
+void meta_screen_cast_window_transform_relative_position (MetaScreenCastWindow *screen_cast_window,
+ double x,
+ double y,
+ double *x_out,
+ double *y_out);
+
+void meta_screen_cast_window_capture_into (MetaScreenCastWindow *screen_cast_window,
+ MetaRectangle *bounds,
+ uint8_t *data);
+
+G_END_DECLS
+
+#endif /* META_SCREEN_CAST_WINDOW_H */
--
2.19.2