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• Event handling

  • Dispatch native events on EDT, to avoid potential race conditions when the state is updated both from EDT and toolkit thread. See the full proposal here  

• Graphics devices support

  • Onscreen/offscreen Wayland surface management

  • Adopt OGL pipeline for rendering on Wayland surfaces

  • Implement a new rendering pipeline based on Vulkan (for better performance)

• java.awt.Robot

  • Sending input events

  • Reading screen data (at least current java application windows)

• Client-side decorations for windows

  • Swing internal frames rendering code can be reused

• Hardware acceleration using  Vulkan.

The prototype implementation of the pure Wayland toolkit (JDK-8281970) based on OpneJDK 21 25 source base can be found in the Wakefield repository (jdk21.0.1jdk25-wayland branch). It has two rendering pipelines:

• Pure software loops (enabled by default)
• Hardware-accelerated rendering using Vulkan (enabled by providing -Dsun.java2d.vulkan=True|true)

Most of the graphics primitives are supported in hardware-accelerated rendering, so it's possible to run Swing applications on top of it. 

 java -Dawt.toolkit.name=WLToolkit -Dsun.java2d.vulkan=True -jar J2DdemoSwingSet2.jar

Image RemovedImage Added

Here is an updated build instruction for building jdk21.0.1jdk25-wayland branch (on ubunu 24.04). You need to have at least JDK24 for bootstrapping:

$ sudo wget -qO- https://packages.lunarg.com/lunarg-signing-key-pub.asc | tee /etc/apt/trusted.gpg.d/lunarg.asc

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$ sudo apt-get -y install openjdk-21-jdk file zip unzip autoconf make build-essential libx11-dev libxext-dev libxrender-dev \

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$ sh configure --with-vulkan

$ make images

Here are some performance resuls with RenderPerfTest:

java -Dawt.toolkit.name=WLToolkit -Dsun.java2d.vulkan=True -jar ./dist/RenderPerfTest.jar 
Vulkan rendering enabled: YES
  Presentation enabled: YES
  Accelerated surface data enabled: YES
  Devices:
    *0: AMD Radeon RX 6800 XT (RADV NAVI21)
     1: llvmpipe (LLVM 19.1.1, 256 bits)
#  Using GraphicsConfiguration(s): [0-0][WLVKGraphicsConfig[B8G8R8A8_UNORM, AMD Radeon RX 6800 XT (RADV NAVI21) (DISCRETE_GPU), LEN LEN T27p-10]]