I need a solution for 10.5 Mac OS

Hi, ALL,

Hopefully I come to the right place for my question

I am Software Developer and recently I needed to test my program under Mac OSX 10.5.

Unfortunately the program crashed.

During the investigation I found that the culprit is in the following piece of code:

[code]

CGLPixelFormatObj pixelFormatObj ;
GLint numPixelFormats ;
CGLPixelFormatAttribute attribs[] =
{
    kCGLPFAFullScreen,
    kCGLPFADisplayMask,
    (CGLPixelFormatAttribute) 0,    /* Display mask bit goes here */
    (CGLPixelFormatAttribute) 0
} ;


if ( display == kCGNullDirectDisplay )
    display = CGMainDisplayID();
attribs[2] = (CGLPixelFormatAttribute) CGDisplayIDToOpenGLDisplayMask(display);


/* Build a full-screen GL context */
CGError error = CGLChoosePixelFormat( attribs, &pixelFormatObj, &numPixelFormats );
if ( pixelFormatObj == NULL )
    return NULL;

[/code]

The error variable is "kNoError", but pixelFormatObj is NULL.

What I am trying to do is to get a screenshot of the current display.

Does anybody know of a good solution to use? Is there a reason why this code perform this way?

Thank you.

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