add reference and description to dbus display and libkms

home.md

@@ -66,10 +66,11 @@ In this wiki, you will find guides about [how to install](#install) and [use](#g
 ### Guest hardware
 
 - [Virtual hardware definition](/virt/vm)
-	- [Chipsets](/virt/vm/chipset)
+	- [Chipset](/virt/vm/chipset)
 	- [Firmware](/virt/vm/firmware)
-	- [Graphic cards](/virt/vm/graphic-card)
-	- [Virtual I/O (virtio) devices](/virt/vm/virtio)
+	- [Graphic card](/virt/vm/graphic-card)
+	- [Virtual I/O device](/virt/vm/virtio)
+	- [Display](/virt/vm/display)
 
 ### Guest software
 

virt/vm/display.md

@@ -0,0 +1,42 @@
+---
+title: Display
+description: 
+published: true
+date: 2025-11-08T10:28:07.779Z
+tags: 
+editor: markdown
+dateCreated: 2022-01-25T14:50:10.751Z
+---
+
+# Virtual displays
+
+There are mutliple displays devices available, or screens where one can access the virtual machine graphical contents.
+
+## Dbus display
+
+The Dbus display is the newest of the bunch.
+
+### libkms
+
+A project called [**libmks**](https://gitlab.gnome.org/GNOME/libmks) is offering an implementation with `libvirt` and `QEMU`.
+
+This project is a GTK library called "libmks" (short for Mouse, Keyboard, Screen) that provides a way to interact with QEMU virtual machines through D-Bus.
+
+It allows GTK applications to display and control VM screens, keyboards, and mice.
+
+Key komponents:
+
+1. **MksDisplay** - A GTK widget that displays the VM screen content, handling the visual representation and user interaction (mouse, keyboard, touch).
+2. **MksScreen** - Represents a VM screen that can be connected to a display widget. It provides access to screen properties and allows configuration of screen dimensions.
+3. **MksKeyboard/MksMouse/MksTouchable** - Abstractions for virtualized QEMU devices that allow sending input events (key presses, mouse clicks/moves, touch events) to the VM.
+4. **MksSession** - Manages the connection to a QEMU instance via D-Bus, discovering available devices and providing access to them.
+5 **MksPaintable** - A GDK paintable object that receives rendering updates from QEMU, supporting both traditional framebuffer updates and DMA-BUF based updates for better performance.
+
+The library uses D-Bus communication with QEMU's display interface to:                                                                                    
+- Attach to VM screens and receive visual updates                                                                                                           
+- Send keyboard/mouse/touch events to the VM                                                                                                                
+- Configure screen properties                                                                                                                               
+- Handle clipboard sharing                                                                                                                                  
+
+It's designed to work with QEMU's D-Bus display interface and provides a GTK-friendly API for integrating VM displays into GTK applications. The library supports both synchronous and asynchronous operations for all its functions.                                                                               
+The project uses GTK 4, GIO, and various GTK components for the UI integration, with D-Bus for communication with QEMU.