I'll find a reference when I get a chance, but I recall reading
somewhere that what you're trying to do won't work. You will need to
use CAOpenGLLayer if you want to add sub-layers to it.
Just to test it, don't add the sub-layer and see if it shows up then.
If it doesn't then you may have other issues in your init code. You
might try hooking up an NSOpenGLView in Interface Builder instead. I
am pretty sure, though that you'll need a CAOpenGLLayer.
Here is a blog post I wrote that shows how to display a QuickTime
movie using a CAOpenGLLayer: http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/
HTH,
-Matt
On Oct 3, 2008, at 10:46 AM, Albert Martin wrote:
Hello,
I am trying to programmatically create an NSOpenGLView and have it
layer-backed. I would use CAOpenGLLayer except that I am using a
subclass of NSOpenGLView and I don't have the time to rewrite it.
Now, for some reason I can not get the NSOpenGLView to show up. If
I use the same subclassed NSOpenGLView in Interface Builder
everything shows up fine and I can communicate with it how I need
to, but if I create it programmatically it simply never shows up.
The weird thing is that I think it is getting created correctly but
is just not becoming visible. The NSOpenGLView plays a QTMovie and
even though it doesn't show up I can still hear the audio from the
QTMovie playing back. Also, I've added a bunch of NSLog's in the
subclass and they all get triggered when I try to communicate with
the version that was created programmatically even though it never
shows up.
Here's my code ... what am I doing wrong?
videoLayer = [[CALayer layer] retain];
NSOpenGLPixelFormatAttribute attributes[] = {
NSOpenGLPFANoRecovery,
NSOpenGLPFAColorSize, 24,
NSOpenGLPFAAlphaSize, 8,
NSOpenGLPFADepthSize, 16,
NSOpenGLPFADoubleBuffer,
NSOpenGLPFAAccelerated,
0};
presentationVideoLayer = [[[IWVideoView alloc] initWithFrame:
NSMakeRect(0, 0, frameRect.size.width, frameRect.size.height)
pixelFormat: [[NSOpenGLPixelFormat alloc]
initWithAttributes:attributes]] retain];
[presentationVideoLayer setLayer: videoLayer];
[presentationVideoLayer setWantsLayer: YES];
[[self layer] addSublayer: videoLayer];
[presentationVideoLayer setNeedsDisplay: YES];
[[presentationVideoLayer openGLContext] update];
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