Hi Mauricio,
The original bug 4413855 is caused by some part of
pixel format structure did not initialize to zero when
using ChoosePixelFormat(), thus the graphics card may choose
a pixel format without hardware accelerated. This is fixed
is current release. I guess there may be performance
problem in v1.2.1 that make you things hardware acceleration
is not available (please send us a test case).
It is easy to see whether hardware acceleration is used or
not by running the test
programs/examples/TextureTest/MultiTextureTest
For more information of opengl acceleration under opengl,
please visit :
http://www.opengl.org/developers/faqs/technical/mswindows.htm
Note that under windows 98, OpenGL hardware acceleration is
not support for multiple monitor. You either need to disable
one monitor in the display setting or switch to DirectX version
in this case.
- Kelvin
--------------
Java 3D Team
Sun Microsystems Inc.
>X-Unix-From: [EMAIL PROTECTED] Thu May 24 17:57:05 2001
>MIME-Version: 1.0
>Date: Thu, 24 May 2001 20:40:23 -0400
>From: Mauricio Vives <[EMAIL PROTECTED]>
>Subject: [JAVA3D] ATI RAGE MOBILITY and Java 3D
>To: [EMAIL PROTECTED]
>
>Hey folks,
>
>I was wondering if any laptop users out there have experienced strange
>hardware acceleration behavior when upgrading Java / Java 3D. Let me
>explain: I have a Dell laptop which uses the popular ATI RAGE MOBILITY
>graphics chip. This chip can provide OpenGL hardware acceleration at
>1024x768 under Windows 2000.
>
>- There was a known bug with Java 3D 1.2 where hardware-accelerated OpenGL
>was not available through Java 3D using *some* graphics cards under Windows
>2000. However, Java 3D 1.2 OpenGL happened to be hardware-accelerated for
>this laptop.
>
>- Java 3D 1.2.1 fixed that bug. However, when this laptop was upgraded to
>Java 3D 1.2.1, hardware acceleration was no longer available, *contrary* to
>the bug being fixed. (I don't know why.)
>
>- The laptop's Java VM has since been upgraded from Java 1.3.0_01 to Java
>1.3.1, and that seems to have restored hardware acceleration under Java 3D
>1.2.1. I was not aware that the Java VM could affect OpenGL hardware
>acceleration.
>
>Has anyone had a similar experience with an ATI RAGE MOBILITY-based laptop?
>Is there an explanation for this? Thanks for any info.
>
>- Mauricio
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA3D-INTEREST". For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".
