[Gl4java-development] Re: [gl4java-usergroup] GLJPanel Under Windows 2000

[<wj...@Th...>]

I've got the GLJPanel samples working on 98, NT, and 2000 (all laptops with
varying quality video cards). I had to pull down the number of colors on
the display down to 256 colors on some of them (not sure how strong the
video cards are). I assume this is the issue? Anyway, when the numColors is
too high, the error is very cryptic. Line 234(?) fails with the "setpixel
failed" message. A better message would be in order, I suppose. I'm kind of
new at this, I don't see why this order of calls should EVER fail (these
are in SetDCPixelFormat):

ChoosePixelFormat
SetPixelFormat

but it does!

So if you get the "setpixel failed" message, try reducing the number of
colors and the samples will work.

Bill K




                                                                                                                                        
                    "Kenneth B. Russell"                                                                                                
                    <kbr...@al...>                   To:     wj...@th...                                          
                    Sent by:                                  cc:     gl4...@li...,                          
                    gl4...@li...urc        gl4...@li...                                
                    eforge.net                                Subject:     Re: [gl4java-usergroup] GLJPanel Under Windows 2000          
                                                                                                                                        
                                                                                                                                        
                    10/04/2001 08:20 AM                                                                                                 
                    Please respond to kbrussel                                                                                          
                                                                                                                                        
                                                                                                                                        





> I am trying to get the GLJPanel working on Windows...

Thanks for the clear bug report. This patch should fix the
problem. Will be checked in to the cvs tree shortly.


>cvs diff -c OpenGL_Win32_jawt.c
Index: OpenGL_Win32_jawt.c
===================================================================
RCS file:
/cvsroot/gl4java/GL4Java/GL4Java/CNativeCode/OpenGL_Win32_jawt.c,v
retrieving revision 1.5
diff -c -r1.5 OpenGL_Win32_jawt.c
*** OpenGL_Win32_jawt.c 2001/07/24 12:07:18     1.5
--- OpenGL_Win32_jawt.c 2001/10/04 06:19:09
***************
*** 426,431 ****
--- 426,435 ----
            return JNI_FALSE;
      }

+     if (joffScreenRenderer) {
+       pData->dsi_win = theWindow;
+     }
+
        /* fetch the states of doubleBuffer and stereo */
      (void) PixelFormatDescriptorFromDc( theWindow, &pfd);

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