After several weeks of delay, at present, Mesa 19.3 has been officially released, as the end of a major upgrade and Vulkan open source OpenGL drivers for Linux systems.
It is reported that, for the purposes of this version upgrade, Intel and AMD Radeon drivers to change to a large extent, as always, dominate the work. At the same time the number and, for this critical part of the open source 3D ecosystem, embedded driver changes and other enhancements are also increasing.
Specifically, a number of major changes Mesa 19.3 include: Intel added for OpenGL 4.6, the first Intel Gen12 / Tigerlake support, Zink merged OpenGL on the basis of Vulkan, adding Radeon Vulkan for better game performance Linux ACO backend, many Intel and Radeon drivers support the new Vulkan extension, Intel Gallium3D good driver status. In addition, there are more Intel performance optimization, and many other changes.
It is worth mentioning that, in Mesa Git in Mesa 20.0 will be released around late February or March, as the next quarterly update function.
Reference News: https://www.phoronix.com/scan.php?page=news_item&px=Mesa-19.3.0-Released