B Java 2D Properties

This appendix presents properties that can be useful in troubleshooting Java 2D.

This appendix contains the following sections:

Properties on Oracle Solaris and Linux

List of Java 2D properties on Oracle Solaris and Linux.

Table B-1 describes the default values of some useful properties on Oracle Solaris and Linux platforms.

Table B-1 Default Java 2D Properties on Oracle Solaris and Linux

Setup DGA SHM Pixmaps OnScreen OffScreen

Oracle Solaris SPARC with DGA support

On

On

Off

DGA/Software

Software

Oracle Solaris SPARC with no DGA, Oracle Solaris x86, Linux, SunRay, VNC

Off

On

On

X11/MITSHM

Shared/Server Pixmaps

J2SE 1.4 or greater: Remote X server, ssh

Off

Off

On

X11

Server Pixmaps

J2SE 1.3.1 or less: Remote X server, ssh

Off

Off

Off

X11

Software

The following list explains how to change the defaults.

  • The X11 pipeline is the default pipeline for Oracle Solaris and Linux. Change this default as follows:

    • -Dsun.java2d.opengl=true — Attempt to enable the OpenGL pipeline.

  • The use of DGA is controlled as follows:

    • NO_J2D_DGA unset — Use DGA, if available.

    • NO_J2D_DGA set — Disable the use of DGA.

  • MIT Shared Memory Extension (SHM) is controlled as follows:

    • To use SHM, if available, specify either one of the following properties:

      NO_J2D_MITSHM unset

      J2D_USE_MITSHM=true

    • To not use SHM, specify either one of the following properties:

      NO_J2D_MITSHM set

      J2D_USE_MITSHM=false

  • The general use of pixmaps is controlled as follows:

    • -Dsun.java2d.pmoffscreen unset — Use pixmaps if DGA is not available.

    • -Dsun.java2d.pmoffscreen=true — Force the use of pixmaps.

    • -Dsun.java2d.pmoffscreen=false — Disable the use of pixmaps.

  • The use of Shared and Server pixmaps is controlled as follows:

    • J2D_PIXMAPS unset — Use both types.

    • J2D_PIXMAPS=shared — Use only shared memory pixmaps.

    • J2D_PIXMAPS=sserver — Use only server-side pixmaps.

  • The choice of default visual is controlled as follows:

    • FORCEDEFVIS unset (default) — Use the best visual available.

    • FORCEDEFVIS set to a hexadecimal value — Use the visual whose ID is the hexadecimal value.

    • FORCEDEFVIS set to any other value — Use the default visual.

Properties on Windows

The following list describes some useful properties on Windows platforms.

  • The DirectDraw/GDI pipeline is the default pipeline for Windows. Change this default as follows:

    • -Dsun.java2d.noddraw=true — Disable the use of the DirectDraw pipeline. GDI will be used instead.

    • -Dsun.java2d.noddraw=false — Enable the use of the DirectDraw pipeline.

    • -Dsun.java2d.d3d=false — Disable the use of the Direct3D pipeline.

    • J2D_D3D=false — Disable the use of the Direct3D pipeline.

    • -Dsun.java2d.d3d=true — Enable the use of the Direct3D pipeline.

    • J2D_D3D=true — Enable the use of the Direct3D pipeline.

  • Control the use of the built-in surface punting mechanism as follows:

    • -Dsun.java2d.ddforcedram=true — Keep volatile images in VRAM.

  • Control the use of DirectDraw blit operations as follows:

    • -Dsun.java2d.ddblit=false — Disable the use of DirectDraw blit operations. GDI blits will be used instead.