service/notifications: add notifications service

src/services/notifications/dbusimage.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <utility>
+
+#include <qdbusargument.h>
+#include <qimage.h>
+#include <qobject.h>
+
+#include "../../core/imageprovider.hpp"
+
+namespace qs::service::notifications {
+
+struct DBusNotificationImage {
+	qint32 width = 0;
+	qint32 height = 0;
+	bool hasAlpha = false;
+	QByteArray data;
+
+	// valid only for the lifetime of the pixmap
+	[[nodiscard]] QImage createImage() const;
+};
+
+const QDBusArgument& operator>>(const QDBusArgument& argument, DBusNotificationImage& pixmap);
+const QDBusArgument& operator<<(QDBusArgument& argument, const DBusNotificationImage& pixmap);
+
+class NotificationImage: public QsImageHandle {
+public:
+	explicit NotificationImage(DBusNotificationImage image, QObject* parent)
+	    : QsImageHandle(QQuickAsyncImageProvider::Image, parent)
+	    , image(std::move(image)) {}
+
+	QImage requestImage(const QString& id, QSize* size, const QSize& requestedSize) override;
+
+	DBusNotificationImage image;
+};
+} // namespace qs::service::notifications