# Mesa Release Notes

# OpenVG State Tracker

The current version of the OpenVG state tracker implements OpenVG 1.0.

More informations about OpenVG can be found at http://www.khronos.org/openvg/ .

The OpenVG state tracker depends on the Gallium architecture and a working EGL implementation.

## Building the library

1. Build Mesa3D with Gallium3D. Any build that builds Gallium3D libraries and EGL will suffice
2. cd src/gallium/state_trackers/vega; make
3. The last step will build libOpenVG library. You can add the libdir to LD_LIBRARY_PATH or install libOpenVG

### Sample build

A sample build looks as follows:

      make linux-x86-64-debug
      cd src/gallium/state_trackers/vega
      make
      cd ../../../..
      export LD_LIBRARY_PATH=$PWD/lib64
      export EGL_DRIVER="egl_softpipe"

## OpenVG Demos

To build the OpenVG demos:

      cd progs/openvg
      make

To run a demo:

      cd openvg/demos
      ./lion

## Notes

- EGL_DRIVER environmental variable: forces usage of a specific EGL driver. Unless you force egl_softpipe the implementation will look for a DRI hardware accelerate driver and unless you have a Gallium driver that supports it, you'll see crashes