Re: [JAVA3D] ATI Rage Mobility 128 M4 and Hardware Acceleration

[Mauricio Vives]

Jack,   You are correct, the issue of hardware acceleration with Java 3D 1.2 has been discussed, but has not been adequately resolved.   Here is a summary of what is known so far:  This problem appears to be limited to Windows 2000, and not Windows 98 or NT.  On Windows 2000, some graphics cards and drivers work properly, usually when running at 32-bit color.  Specifically, I have found that any GeForce or TNT-based card with the Detonator 3 driver running at 32-bit color will provide OpenGL hardware acceleration under Windows 2000.  Also, RAGE MOBILITY chips using the latest driver can run Java 3D with hardware acceleration at 32-bit color (although the hardware acceleration is not substantial).   I believe there is very little reason for Java 3D to select non-accelerated pixel formats, when a native (C++) application can easily select an accelerated pixel format with the same resolution and color depth.  Remember that access to OpenGL is done by the Java 3D DLLs with native code.  Can anyone on the Java 3D team who is familiar with the pixel format selection code shed some light on this?   Jack, how did you determine which pixel format was selected by Java 3D? -----Original Message----- From: Jack Pien [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 06, 2001 9:21 PM To: [EMAIL PROTECTED] Subject: [JAVA3D] Java3D issues with ATI Rage Mobility 128 M4 hi,   i was wondering if anyone has ran Java3D (1.2OpenGL w/ Java1.3) on an ATI Rage Mobility M4 128 (on a Dell Inspiron 8000).  i see a consistent system hang which requires a reboot whenever you clip the Java3D window (running any j3d demo app) with another window or against the edge of the screen.  J3D works if it's not clipped, just when you start dragging a window over the Java3D window, you'd get a hang after some dragging and clipping.  this is most likely a graphics driver bug but just wanted to see if anyone has seen the same problems - or better yet, if anyone knows the reason for the hang.   also, it also seems like the ATI Rage Mobility only accelerates in 32 bit color mode (i saw someone post this phenomenon in a past thread but didn't see a resolution).  16 bit color mode seems to lead to use of a non-accelerated pixel format (ie HelloUniverse uses pixel format 3 or 4 in 32 bit mode but pixel format 12 in 16 bit mode).  but when i run some OpenGL benchmarks (like Glaze, 3Dlabs sample demo/benchmarks) they all seem to accelerate fine in 16 bit color mode.  anyone see this?  reasons?    thanks.   Jack Pien Asenza Corporation (650)838-0068 [EMAIL PROTECTED]