libmks/lib/mks-screen.c

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/*
* mks-screen.c
*
* Copyright 2023 Christian Hergert <chergert@redhat.com>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* This library 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
* Lesser 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 <http://www.gnu.org/licenses/>.
*
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* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include <errno.h>
#include <sys/socket.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
#include "mks-device-private.h"
#include "mks-enums.h"
#include "mks-qemu.h"
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#include "mks-keyboard.h"
#include "mks-mouse.h"
#include "mks-paintable-private.h"
#include "mks-screen-attributes-private.h"
#include "mks-screen.h"
#include "mks-touchable.h"
struct _MksScreenClass
{
MksDeviceClass parent_class;
};
struct _MksScreen
{
MksDevice parent_instance;
MksQemuConsole *console;
gulong console_notify_handler;
MksKeyboard *keyboard;
MksMouse *mouse;
MksTouchable *touchable;
guint number;
guint width;
guint height;
MksScreenKind kind : 2;
};
G_DEFINE_FINAL_TYPE (MksScreen, mks_screen, MKS_TYPE_DEVICE)
enum {
PROP_0,
PROP_DEVICE_ADDRESS,
PROP_HEIGHT,
PROP_KIND,
PROP_KEYBOARD,
PROP_MOUSE,
PROP_NUMBER,
PROP_WIDTH,
N_PROPS
};
static GParamSpec *properties [N_PROPS];
static void
mks_screen_set_width (MksScreen *self,
guint width)
{
g_assert (MKS_IS_SCREEN (self));
if (self->width != width)
{
self->width = width;
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_WIDTH]);
}
}
static void
mks_screen_set_height (MksScreen *self,
guint height)
{
g_assert (MKS_IS_SCREEN (self));
if (self->height != height)
{
self->height = height;
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_HEIGHT]);
}
}
static void
mks_screen_set_number (MksScreen *self,
guint number)
{
g_assert (MKS_IS_SCREEN (self));
if (self->number != number)
{
self->number = number;
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_NUMBER]);
}
}
static void
mks_screen_set_type (MksScreen *self,
const char *type)
{
MksScreenKind kind;
g_assert (MKS_IS_SCREEN (self));
kind = MKS_SCREEN_KIND_TEXT;
if (strcmp (type, "Graphic") == 0)
kind = MKS_SCREEN_KIND_GRAPHIC;
if (kind != self->kind)
{
self->kind = kind;
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_KIND]);
}
}
static void
mks_screen_console_notify_cb (MksScreen *self,
GParamSpec *pspec,
MksQemuConsole *console)
{
g_assert (MKS_IS_SCREEN (self));
g_assert (pspec != NULL);
g_assert (MKS_QEMU_IS_CONSOLE (console));
if (strcmp (pspec->name, "label") == 0)
_mks_device_set_name (MKS_DEVICE (self), mks_qemu_console_get_label (console));
else if (strcmp (pspec->name, "width") == 0)
mks_screen_set_width (self, mks_qemu_console_get_width (console));
else if (strcmp (pspec->name, "height") == 0)
mks_screen_set_height (self, mks_qemu_console_get_height (console));
else if (strcmp (pspec->name, "number") == 0)
mks_screen_set_number (self, mks_qemu_console_get_head (console));
else if (strcmp (pspec->name, "type") == 0)
mks_screen_set_type (self, mks_qemu_console_get_type_ ((console)));
}
static void
mks_screen_set_console (MksScreen *self,
MksQemuConsole *console)
{
g_assert (MKS_IS_SCREEN (self));
g_assert (!console || MKS_QEMU_IS_CONSOLE (console));
if (self->console != NULL)
return;
if (g_set_object (&self->console, console))
{
_mks_device_set_name (MKS_DEVICE (self), mks_qemu_console_get_label (console));
self->console_notify_handler =
g_signal_connect_object (console,
"notify",
G_CALLBACK (mks_screen_console_notify_cb),
self,
G_CONNECT_SWAPPED);
mks_screen_set_type (self, mks_qemu_console_get_type_ ((console)));
mks_screen_set_width (self, mks_qemu_console_get_width (console));
mks_screen_set_height (self, mks_qemu_console_get_height (console));
mks_screen_set_number (self, mks_qemu_console_get_head (console));
}
}
static gboolean
mks_screen_setup (MksDevice *device,
MksQemuObject *object)
{
MksScreen *self = (MksScreen *)device;
g_autolist(GDBusInterface) interfaces = NULL;
g_assert (MKS_IS_SCREEN (self));
g_assert (MKS_QEMU_IS_OBJECT (object));
interfaces = g_dbus_object_get_interfaces (G_DBUS_OBJECT (object));
for (const GList *iter = interfaces; iter; iter = iter->next)
{
GDBusInterface *iface = iter->data;
if (MKS_QEMU_IS_CONSOLE (iface))
mks_screen_set_console (self, MKS_QEMU_CONSOLE (iface));
else if (MKS_QEMU_IS_KEYBOARD (iface))
self->keyboard = _mks_device_new (MKS_TYPE_KEYBOARD, device->session, object);
else if (MKS_QEMU_IS_MOUSE (iface))
self->mouse = _mks_device_new (MKS_TYPE_MOUSE, device->session, object);
else if (MKS_QEMU_IS_MULTI_TOUCH (iface))
self->touchable = _mks_device_new (MKS_TYPE_TOUCHABLE, device->session, object);
}
return self->console != NULL &&
self->keyboard != NULL &&
self->mouse != NULL;
}
static void
mks_screen_dispose (GObject *object)
{
MksScreen *self = (MksScreen *)object;
if (self->console != NULL)
{
g_clear_signal_handler (&self->console_notify_handler, self->console);
g_clear_object (&self->console);
}
g_clear_object (&self->keyboard);
g_clear_object (&self->mouse);
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g_clear_object (&self->touchable);
G_OBJECT_CLASS (mks_screen_parent_class)->dispose (object);
}
static void
mks_screen_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MksScreen *self = MKS_SCREEN (object);
switch (prop_id)
{
case PROP_DEVICE_ADDRESS:
g_value_set_string (value, mks_screen_get_device_address (self));
break;
case PROP_KEYBOARD:
g_value_set_object (value, mks_screen_get_keyboard (self));
break;
case PROP_KIND:
g_value_set_enum (value, mks_screen_get_kind (self));
break;
case PROP_MOUSE:
g_value_set_object (value, mks_screen_get_mouse (self));
break;
case PROP_NUMBER:
g_value_set_uint (value, mks_screen_get_number (self));
break;
case PROP_WIDTH:
g_value_set_uint (value, mks_screen_get_width (self));
break;
case PROP_HEIGHT:
g_value_set_uint (value, mks_screen_get_height (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
mks_screen_class_init (MksScreenClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
MksDeviceClass *device_class = MKS_DEVICE_CLASS (klass);
object_class->dispose = mks_screen_dispose;
object_class->get_property = mks_screen_get_property;
device_class->setup = mks_screen_setup;
properties [PROP_DEVICE_ADDRESS] =
g_param_spec_string ("device-address", NULL, NULL,
NULL,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
properties [PROP_KEYBOARD] =
g_param_spec_object ("keyboard", NULL, NULL,
MKS_TYPE_KEYBOARD,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
properties [PROP_KIND] =
g_param_spec_enum ("kind", NULL, NULL,
MKS_TYPE_SCREEN_KIND,
MKS_SCREEN_KIND_TEXT,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
properties [PROP_MOUSE] =
g_param_spec_object ("mouse", NULL, NULL,
MKS_TYPE_MOUSE,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
properties [PROP_NUMBER] =
g_param_spec_uint ("number", NULL, NULL,
0, G_MAXUINT, 0,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
properties [PROP_WIDTH] =
g_param_spec_uint ("width", NULL, NULL,
0, G_MAXUINT, 0,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
properties [PROP_HEIGHT] =
g_param_spec_uint ("height", NULL, NULL,
0, G_MAXUINT, 0,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, N_PROPS, properties);
}
static void
mks_screen_init (MksScreen *self)
{
}
/**
* mks_screen_get_keyboard:
* @self: a #MksScreen
*
* Gets the #MksScreen:keyboard property.
*
* Returns: (transfer none): a #MksKeyboard
*/
MksKeyboard *
mks_screen_get_keyboard (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), NULL);
return self->keyboard;
}
/**
* mks_screen_get_mouse:
* @self: a #MksScreen
*
* Gets the #MksScreen:mouse property.
*
* Returns: (transfer none): a #MksMouse
*/
MksMouse *
mks_screen_get_mouse (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), NULL);
return self->mouse;
}
/**
* mks_screen_get_touchable:
* @self: a #MksScreen
*
* Gets the #MksScreen:touchable property.
*
* Returns: (transfer none): a #MksTouchable
*/
MksTouchable *
mks_screen_get_touchable (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), NULL);
return self->touchable;
}
/**
* mks_screen_get_kind:
* @self: a #MksScreen
*
* Gets the "kind" property.
*
* Returns: a #MksScreenKind
*/
MksScreenKind
mks_screen_get_kind (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), MKS_SCREEN_KIND_TEXT);
return self->kind;
}
/**
* mks_screen_get_width:
* @self: a #MksScreen
*
* Gets the "width" property.
*
* Returns: The width of the screen in pixels.
*/
guint
mks_screen_get_width (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), 0);
return self->width;
}
/**
* mks_screen_get_height:
* @self: a #MksScreen
*
* Gets the "height" property.
*
* Returns: The height of the screen in pixels.
*/
guint
mks_screen_get_height (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), 0);
return self->height;
}
/**
* mks_screen_get_number:
* @self: a #MksScreen
*
* Gets the "number" property.
*
* Returns: the screen number
*/
guint
mks_screen_get_number (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), 0);
return self->number;
}
const char *
mks_screen_get_device_address (MksScreen *self)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), NULL);
if (self->console != NULL)
return mks_qemu_console_get_device_address (self->console);
return NULL;
}
static gboolean
check_console (MksScreen *self,
GError **error)
{
if (self->console == NULL)
{
g_set_error_literal (error,
G_IO_ERROR,
G_IO_ERROR_NOT_CONNECTED,
"Not connected");
return FALSE;
}
return TRUE;
}
static void
mks_screen_configure_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksQemuConsole *console = (MksQemuConsole *)object;
g_autoptr(GError) error = NULL;
g_autoptr(GTask) task = user_data;
g_assert (MKS_QEMU_IS_CONSOLE (console));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (G_IS_TASK (task));
if (!mks_qemu_console_call_set_uiinfo_finish (console, result, &error))
g_task_return_error (task, g_steal_pointer (&error));
else
g_task_return_boolean (task, TRUE);
}
/**
* mks_screen_configure_async:
* @self: an #MksScreen
* @attributes: (transfer full): a #MksScreenAttributes
* @cancellable: (nullable): a #GCancellable
* @callback: a #GAsyncReadyCallback to execute upon completion
* @user_data: closure data for @callback
*
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* Requests the QEMU instance reconfigure the screen with @attributes.
*
* This function takes ownership of @attributes.
*
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* @callback is executed upon acknowledgment from the QEMU instance or
* if the request timed out.
*
* Call mks_screen_configure_finish() to get the result.
*/
void
mks_screen_configure (MksScreen *self,
MksScreenAttributes *attributes,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
g_autoptr(GError) error = NULL;
g_return_if_fail (MKS_IS_SCREEN (self));
g_return_if_fail (attributes != NULL);
g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_source_tag (task, mks_screen_configure);
if (!check_console (self, &error))
g_task_return_error (task, g_steal_pointer (&error));
else
mks_qemu_console_call_set_uiinfo (self->console,
attributes->width_mm,
attributes->height_mm,
attributes->x_offset,
attributes->y_offset,
attributes->width,
attributes->height,
cancellable,
mks_screen_configure_cb,
g_steal_pointer (&task));
mks_screen_attributes_free (attributes);
}
/**
* mks_screen_configure_finish:
* @self: an #MksScreen
* @result: a #GAsyncResult provided to callback
* @error: a location for a #GError, or %NULL
*
* Completes a call to mks_screen_configure().
*
* Returns: %TRUE if the operation completed successfully; otherwise %FALSE
* and @error is set.
*/
gboolean
mks_screen_configure_finish (MksScreen *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), FALSE);
g_return_val_if_fail (g_task_is_valid (result, self), FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* mks_screen_configure_sync:
* @self: a #MksScreen
* @attributes: (transfer full): a #MksScreenAttributes
* @cancellable: a #GCancellable
* @error: a location for a #GError, or %NULL
*
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* Requests the QEMU instance reconfigure the screen using @attributes.
*
* This function takes ownership of @attributes.
*
* Returns: %TRUE if the operation completed successfully; otherwise %FALSE
* and @error is set.
*/
gboolean
mks_screen_configure_sync (MksScreen *self,
MksScreenAttributes *attributes,
GCancellable *cancellable,
GError **error)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), FALSE);
g_return_val_if_fail (attributes != NULL, FALSE);
g_return_val_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable), FALSE);
if (!check_console (self, error))
return FALSE;
return mks_qemu_console_call_set_uiinfo_sync (self->console,
attributes->width_mm,
attributes->height_mm,
attributes->x_offset,
attributes->y_offset,
attributes->width,
attributes->height,
cancellable,
error);
}
static void
mks_screen_attach_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksQemuConsole *console = (MksQemuConsole *)object;
g_autoptr(GTask) task = user_data;
g_autoptr(GError) error = NULL;
g_assert (G_IS_OBJECT (object));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (G_IS_TASK (task));
if (!mks_qemu_console_call_register_listener_finish (console, NULL, result, &error))
g_task_return_error (task, g_steal_pointer (&error));
else
g_task_return_pointer (task,
g_object_ref (g_task_get_task_data (task)),
g_object_unref);
}
/**
* mks_screen_attach:
* @self: an #MksScreen
* @cancellable: (nullable): a #GCancellable
* @callback: a #GAsyncReadyCallback to execute upon completion
* @user_data: closure data for @callback
*
* Asynchronously creates a #GdkPaintable that is updated with the
* contents of the screen.
*
* This function registers a new `socketpair()` which is shared with
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* the QEMU instance to receive rendering updates. Those updates are
* propagated to the resulting #GdkPainable which can be retrieved
* using mks_screen_attach_finish() from @callback.
*/
void
mks_screen_attach (MksScreen *self,
GdkDisplay *display,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GUnixFDList) unix_fd_list = NULL;
g_autoptr(GdkPaintable) paintable = NULL;
g_autoptr(GTask) task = NULL;
g_autoptr(GError) error = NULL;
g_autofd int fd = -1;
g_return_if_fail (MKS_IS_SCREEN (self));
g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_source_tag (task, mks_screen_attach);
if (!check_console (self, &error) ||
!(paintable = _mks_paintable_new (display, cancellable, &fd, &error)))
goto failure;
g_task_set_task_data (task, g_steal_pointer (&paintable), g_object_unref);
unix_fd_list = g_unix_fd_list_new_from_array (&fd, 1), fd = -1;
mks_qemu_console_call_register_listener (self->console,
g_variant_new_handle (0),
unix_fd_list,
cancellable,
mks_screen_attach_cb,
g_steal_pointer (&task));
return;
failure:
g_task_return_error (task, g_steal_pointer (&error));
}
/**
* mks_screen_attach_finish:
* @self: an #MksScreen
* @result: a #GAsyncResult provided to callback
* @error: a location for a #GError, or %NULL
*
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* Completes an asynchronous request to create a [iface@Gdk.Paintable] containing
* the contents of #MksScreen in the QEMU instance.
*
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* The resulting [iface@Gdk.Paintable] will be updated as changes are delivered
* from QEMU over a private `socketpair()`. In the typical case, those
* changes are propagated using a DMA-BUF and damage notifications.
*
* Returns: (transfer full): a #GdkPainable if successful; otherwise %NULL
* and @error is set.
*/
GdkPaintable *
mks_screen_attach_finish (MksScreen *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (MKS_IS_SCREEN (self), FALSE);
g_return_val_if_fail (g_task_is_valid (result, self), FALSE);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* mks_screen_attach_sync:
* @self: a #MksScreen
* @cancellable: (nullable): a #GCancellable or %NULL
* @error: (nullable): a location for a #GError, or %NULL
*
* Synchronous request to attach to screen, creating a paintable that can
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* be used to update display as the QEMU instance updates.
*
* Returns: (transfer full): a #GdkPaintable if successful; otherwise %NULL
* and @error is set.
*/
GdkPaintable *
mks_screen_attach_sync (MksScreen *self,
GdkDisplay *display,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GUnixFDList) unix_fd_list = NULL;
g_autoptr(GdkPaintable) paintable = NULL;
g_autofd int fd = -1;
g_return_val_if_fail (MKS_IS_SCREEN (self), NULL);
g_return_val_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable), NULL);
if (!check_console (self, error) ||
!(paintable = _mks_paintable_new (display, cancellable, &fd, error)))
return NULL;
unix_fd_list = g_unix_fd_list_new_from_array (&fd, 1), fd = -1;
if (!mks_qemu_console_call_register_listener_sync (self->console,
g_variant_new_handle (0),
unix_fd_list,
NULL,
cancellable,
error))
return NULL;
return g_steal_pointer (&paintable);
}