Jamie, I am running thru your 2004 apple developer posts. http://lists.apple.com/archives/carbon-development/2004/Jan/msg00318.html I am trying to figure out how you solved the carbon windowing issue you had with Gem for my external but you never posted a solution. What did you finaly do to get it working? I am looking at the GemWinCreateMac.cpp but cant find the solution. Thanks, Alain

From: nosehair911@bellsouth.net Date: 2007/06/25 Mon AM 09:18:44 EDT To: pd-dev@iem.at Subject: Re: [PD-dev] Pd external-window crash

...

Well it looks like if I get a Gemwin opened first, then I can open an opencv window without a

crash...

...

...

It seems like the window is made using Carbon. Is there any special way Pd handles Carbon windows that would cause this stall?

This is my last hurdle. I have my externals working but in order to use the carbon window I have to open a gemwin first(not very profecional). I am using an opencv function for windowing that looks like this:

CV_IMPL int cvNamedWindow( const char* name, int flags ) { int result = 0; CV_FUNCNAME( "cvNamedWindow" ); if (!wasInitialized) cvInitSystem(0, NULL);

// to be able to display a window, we need to be a 'faceful' application
// http://lists.apple.com/archives/carbon-dev/2005/Jun/msg01414.html
static bool switched_to_faceful = false;
if (! switched_to_faceful)
{
    ProcessSerialNumber psn = { 0, kCurrentProcess };
    OSStatus ret = TransformProcessType (&psn, kProcessTransformToForegroundApplication );

    if (ret == noErr) 
    {
        SetFrontProcess( &psn );
        switched_to_faceful = true;
    }
    else
    {
        fprintf(stderr, "Failed to tranform process type: %d\n", (int) ret);
        fflush (stderr);
    }
}

__BEGIN__;

WindowRef       outWindow = NULL;
OSStatus              err = noErr;
Rect        contentBounds = {100,100,320,440};

CvWindow* window;
UInt wAttributes = 0;

int len;

const EventTypeSpec genericWindowEventHandler[] = { 
    { kEventClassMouse, kEventMouseMoved},
    { kEventClassMouse, kEventMouseUp},
    { kEventClassMouse, kEventMouseDown},
    { kEventClassWindow, kEventWindowClose },
    { kEventClassWindow, kEventWindowBoundsChanged }//FD
};

if( !name )
    CV_ERROR( CV_StsNullPtr, "NULL name string" );

if( icvFindWindowByName( name ) != 0 ){
    result = 1;
    EXIT;
}
len = strlen(name);
CV_CALL( window = (CvWindow*)cvAlloc(sizeof(CvWindow) + len + 1));
memset( window, 0, sizeof(*window));
window->name = (char*)(window + 1);
memcpy( window->name, name, len + 1 );
window->flags = flags;
window->signature = CV_WINDOW_MAGIC_VAL;
window->image = 0;
window->last_key = 0;
window->on_mouse = 0;
window->on_mouse_param = 0;

window->next = hg_windows;
window->prev = 0;
if( hg_windows )
    hg_windows->prev = window;
hg_windows = window;
wAttributes =  kWindowStandardDocumentAttributes | kWindowStandardHandlerAttribute | 

kWindowLiveResizeAttribute;

err = CreateNewWindow ( kDocumentWindowClass,wAttributes,&contentBounds,&outWindow);
if (err != noErr)
    fprintf(stderr,"Error while creating the window\n");

SetWindowTitleWithCFString(outWindow,CFStringCreateWithCString

(NULL,name,kCFStringEncodingASCII)); if (err != noErr) fprintf(stdout,"Error SetWindowTitleWithCFString\n");

window->window = outWindow;

err = InstallWindowEventHandler(outWindow, NewEventHandlerUPP(windowEventHandler), 

GetEventTypeCount(genericWindowEventHandler), genericWindowEventHandler, outWindow, NULL);

ShowWindow( outWindow );
result = 1;

__END__;
return result;

}

It seems to me that if this works outside of Pd then there must be something Pd needs in order to display a carbon window properly. It seems that the "faceful" stuff was written in to prevent this from happening but it doesnt work in Pd. I have been digging thru the Gem code to find out how it does it but it is so intertwined with the openGL code that I cant seem to figure out how it displays a carbon window corectly. Anyway if anyone has any ideas let me know. Until I figure this out I will be

opening

up a gemwin along with my external:(. Alain

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