PIKApp/plug-ins/screenshot/screenshot-freedesktop.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Screenshot plug-in
* Copyright 1998-2007 Sven Neumann <sven@gimp.org>
* Copyright 2003 Henrik Brix Andersen <brix@gimp.org>
* Copyright 2016 Michael Natterer <mitch@gimp.org>
* Copyright 2017 Jehan <jehan@gimp.org>
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <glib.h>
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#endif
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#ifdef GDK_WINDOWING_WAYLAND
#include <gdk/gdkwayland.h>
#endif
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#include "screenshot.h"
#include "screenshot-freedesktop.h"
static GDBusProxy *proxy = NULL;
gboolean
screenshot_freedesktop_available (void)
{
proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
NULL,
"org.freedesktop.portal.Desktop",
"/org/freedesktop/portal/desktop",
"org.freedesktop.portal.Screenshot",
NULL, NULL);
if (proxy)
{
GError *error = NULL;
g_dbus_proxy_call_sync (proxy, "org.freedesktop.DBus.Peer.Ping",
NULL,
G_DBUS_CALL_FLAGS_NONE,
-1, NULL, &error);
if (! error)
return TRUE;
g_clear_error (&error);
g_object_unref (proxy);
proxy = NULL;
}
return FALSE;
}
ScreenshotCapabilities
screenshot_freedesktop_get_capabilities (void)
{
/* Portal has no capabilities other than root screenshot! */
return 0;
}
static void
screenshot_freedesktop_dbus_signal (GDBusProxy *proxy,
gchar *sender_name,
gchar *signal_name,
GVariant *parameters,
PikaImage **image)
{
if (g_strcmp0 (signal_name, "Response") == 0)
{
GVariant *results;
guint32 response;
g_variant_get (parameters, "(u@a{sv})",
&response,
&results);
/* Possible values:
* 0: Success, the request is carried out
* 1: The user cancelled the interaction
* 2: The user interaction was ended in some other way
* Cf. https://github.com/flatpak/xdg-desktop-portal/blob/master/data/org.freedesktop.portal.Request.xml
*/
if (response == 0)
{
gchar *uri;
if (g_variant_lookup (results, "uri", "s", &uri))
{
GFile *file = g_file_new_for_uri (uri);
*image = pika_file_load (PIKA_RUN_NONINTERACTIVE, file);
/* Delete the actual file. */
g_file_delete (file, NULL, NULL);
g_object_unref (file);
g_free (uri);
}
}
g_variant_unref (results);
/* Quit anyway. */
gtk_main_quit ();
}
}
PikaPDBStatusType
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screenshot_freedesktop_shoot (GdkMonitor *monitor,
PikaImage **image,
GError **error)
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{
GVariant *retval;
GVariantBuilder *options;
gchar *opath = NULL;
gchar *parent_window = NULL;
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#if defined (GDK_WINDOWING_X11) || defined (GDK_WINDOWING_WAYLAND)
GBytes *handle;
handle = pika_progress_get_window_handle ();
#endif
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#ifdef GDK_WINDOWING_X11
if (GDK_IS_X11_DISPLAY (gdk_display_get_default ()))
{
GdkWindow *window;
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guint32 *handle_data;
guint32 window_id;
gsize handle_size;
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handle_data = (guint32 *) g_bytes_get_data (handle, &handle_size);
g_return_val_if_fail (handle_size == sizeof (guint32), PIKA_PDB_EXECUTION_ERROR);
window_id = *handle_data;
window = gdk_x11_window_foreign_new_for_display (gdk_display_get_default (), window_id);
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if (window)
{
gint id;
id = GDK_WINDOW_XID (window);
parent_window = g_strdup_printf ("x11:0x%x", id);
}
}
#endif
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#ifdef GDK_WINDOWING_WAYLAND
if (GDK_IS_WAYLAND_DISPLAY (gdk_display_get_default ()))
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{
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char *handle_data;
gchar *handle_str;
gsize handle_size;
handle_data = (char *) g_bytes_get_data (handle, &handle_size);
/* Even though this should be the case by design, this ensures the
* string is NULL-terminated to avoid out-of allocated memory access.
*/
handle_str = g_strndup (handle_data, handle_size);
parent_window = g_strdup_printf ("wayland:%s", handle_str);
g_free (handle_str);
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}
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#endif
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#if defined (GDK_WINDOWING_X11) || defined (GDK_WINDOWING_WAYLAND)
g_bytes_unref (handle);
#endif
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options = g_variant_builder_new (G_VARIANT_TYPE ("a{sv}"));
/* "interactive" option will display the options first (otherwise, it
* makes a screenshot first, then proposes to tweak. Since version 2
* of the API. For older implementations, it should just be ignored.
*/
g_variant_builder_add (options, "{sv}", "interactive", g_variant_new_boolean (TRUE));
retval = g_dbus_proxy_call_sync (proxy, "Screenshot",
g_variant_new ("(sa{sv})",
parent_window ? parent_window : "",
options, NULL),
G_DBUS_CALL_FLAGS_NONE,
-1, NULL, error);
g_free (parent_window);
g_object_unref (proxy);
g_variant_builder_unref (options);
proxy = NULL;
if (retval)
{
g_variant_get (retval, "(o)", &opath);
g_variant_unref (retval);
}
if (opath)
{
GDBusProxy *proxy2 = NULL;
proxy2 = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
NULL,
"org.freedesktop.portal.Desktop",
opath,
"org.freedesktop.portal.Request",
NULL, NULL);
*image = NULL;
g_signal_connect (proxy2, "g-signal",
G_CALLBACK (screenshot_freedesktop_dbus_signal),
image);
gtk_main ();
g_object_unref (proxy2);
g_free (opath);
/* Signal got a response. */
if (*image)
{
if (! pika_image_get_color_profile (*image))
{
/* The Freedesktop portal does not return a profile, so we
* don't have color characterization through the API.
* Ideally then, the returned screenshot image would have
* embedded profile, but this depends on each desktop
* implementation of the portal (and at time of writing,
* the GNOME implementation of Freedesktop portal at least
* didn't embed a profile with the returned PNG image).
*
* As a last resort, we assign the profile of current
* monitor. This will actually only work if we use the
* portal on X11 (because we don't have monitor's profile
* access on Wayland AFAIK), and only as long as this is a
* single-display setup.
*
* We need to figure out how to do better color management for
* portal screenshots. TODO!
*/
PikaColorProfile *profile;
profile = pika_monitor_get_color_profile (monitor);
if (profile)
{
pika_image_set_color_profile (*image, profile);
g_object_unref (profile);
}
}
return PIKA_PDB_SUCCESS;
}
}
return PIKA_PDB_EXECUTION_ERROR;
}