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libmks/lib/mks-screen.c
Christian Hergert ed03ea5148 lib: move PaintableListener into MksPaintable 
The goal here is to keep the MksPaintableListener inside of MksPaintable
so that we don't have to create API between the two. Additionally, the
MksPaintable can own it's own G-DBus connection as we don't want to share
them for updates with anything else (as they can have large data chunks
coming across).
2023-02-10 16:14:51 -08:00

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/*
* mks-screen.c
*
* Copyright 2023 Christian Hergert <chergert@redhat.com>
*
* 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 <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "config.h"
#include <errno.h>
#include <sys/socket.h>
#include <glib/gstdio.h>
#include "mks-device-private.h"
#include "mks-enums.h"
#include "mks-qemu.h"
#include "mks-keyboard-private.h"
#include "mks-mouse-private.h"
#include "mks-paintable-private.h"
#include "mks-screen-attributes-private.h"
#include "mks-screen-private.h"
struct _MksScreenClass
{
MksDeviceClass parent_class;
};
struct _MksScreen
{
MksDevice parent_instance;
MksQemuConsole *console;
gulong console_notify_handler;
MksKeyboard *keyboard;
MksMouse *mouse;
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_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));
}
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))
{
const char *type;
_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);
if ((type = mks_qemu_console_get_type_ ((console))))
{
if (strcmp (type, "Graphic") == 0)
self->kind = MKS_SCREEN_KIND_GRAPHIC;
}
self->width = mks_qemu_console_get_width (console);
self->height = mks_qemu_console_get_height (console);
self->number = 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);
}
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);
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_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
*
* Requests the Qemu instance reconfigure the screen with @attributes.
*
* This function takes ownership of @attributes.
*
* @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
*
* 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
* 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,
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 (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
*
* Completes an asynchronous request to create a #GdkPaintable containing
* the contents of #MksScreen in the Qemu instance.
*
* The resulting #GdkPaintable 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
* 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,
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 (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);
}
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