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