Issues with multithread and opengl for loading textures

[ipodishima]

Hi everyone !

I'm trying to use sharegroup to load textures in Background, but i have some issues. I use the myEAGLView from CrashLanding sample. Textures are loaded, but when i use them, it's just white on the screen with this recurrent message on gdb : Failed to swap renderbuffer in -[MyEAGLView swapBuffers]
I use my device to test my app.

Here is some code :

// viewDidLoad of my rootViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    [self loadArcadeViewController];
// add ActivityIndicator
    [arcadeViewController performSelectorInBackground:@selector(loadImages:) withObject:self];
}

With a classic load of viewController :

- (void) loadArcadeViewController {
	ArcadeViewController *viewController = [[ArcadeViewController alloc] initWithNibName:@"ArcadeViewController" bundle:nil];
	self.arcadeViewController = viewController;
	[viewController release];
}

initWithNIBName for ArcadeViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {

    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {

		NSBundle*				bundle = [NSBundle mainBundle];

		CGRect					rect = [[UIScreen mainScreen] bounds];	

		FarWestAppDelegate *appDelegate = (FarWestAppDelegate*)[[UIApplication sharedApplication] delegate];
		glView = [appDelegate.eaglView retain];
		[self.view addSubview:glView];
		//Set up OpenGL projection matrix

		glMatrixMode(GL_PROJECTION);

		// on dimensionne la taille de la zone de dessin
		glOrthof(-rect.size.width / 2.0f, rect.size.width / 2.0f, -rect.size.height / 2, rect.size.height / 2, -10.0f, 10.0f);
		// on fait une rotation de 90° pour gérer le mode portrait
		glRotatef(kOrientationAngle, 0, 0, 1);
		// on se translate pour mettre l'origine en bas à droite
                glTranslatef(-rect.size.height / 2.0f, -rect.size.width / 2, 0.0);

		glMatrixMode(GL_MODELVIEW);
    }

    return self;

}

Then my method loadImages from ArcadeViewController (i use a singleton to manage my textures :

- (void) loadImages:(id)sender {

	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

	myGlobal = [GameGlobals globalInstance:sender];

	[pool release];

}

And to conclude :

+ (GameGlobals*)globalInstance:(id)sender {

	static GameGlobals *globalInstance;	

	@synchronized(self) {

		if(!globalInstance) {

			globalInstance = [[GameGlobals alloc] initWithSender:(id)sender];

		}

	}

	return globalInstance;

}


- (id) initWithSender:(id)sender {

	self.dictionaryOfTexture = [[NSMutableDictionary alloc] init];


	NSMutableArray *arrayOfText = [[NSMutableArray alloc] init];


	FarWestAppDelegate *appDelegate = (FarWestAppDelegate*)[[UIApplication sharedApplication] delegate];

	// i use shareGroup
	EAGLContext *secondContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1 sharegroup:[appDelegate.eaglView._context sharegroup]];

	[EAGLContext setCurrentContext:secondContext];

	glMatrixMode(GL_MODELVIEW);

	

	//Initialize OpenGL states

	glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

	glEnable(GL_TEXTURE_2D);

	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

	glEnableClientState(GL_VERTEX_ARRAY);

	glEnableClientState(GL_TEXTURE_COORD_ARRAY);

	

	//Load the background texture and configure it

	_textures[kTexture_Background] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"fond.png"]];

	glBindTexture(GL_TEXTURE_2D, [_textures[kTexture_Background] name]);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

	

	// Load the textures (maybe that's not the better solution i'm aware of this)

	_textures[kTexture_Batiment] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"batiment_Ext.png"]];

	_textures[kTexture_Balcon] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"balcon.png"]];

	_textures[kTexture_Devanture] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"devanture.png"]];

	_textures[kTexture_Cactus_Troncs] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"cactus-troncs.png"]];

	_textures[kTexture_Cactus_Gauche] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"cactus1.png"]];

	_textures[kTexture_Cactus_Droit] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"cactus2.png"]];

	_textures[kTexture_Pierre] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"pierre.png"]];

	_textures[kTexture_Enseigne] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"enseigne.png"]];

	_textures[kTexture_Menu] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"saloonIntro.jpg"]];

	_textures[kTexture_GameOver] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"gameOver.jpg"]];



	for (int i = 0 ; i < kNumTexturesScene ; i ++)

	{
		[arrayOfText addObject:[[[NSData alloc] init] autorelease]];	
	}

	

	for (int i = 0 ; i < kNumTexturesScene ; i ++)

	{
		[arrayOfText replaceObjectAtIndex:i withObject:_textures[i]];

	}

	

	[dictionaryOfTexture setObject:[arrayOfText copy] forKey:kTextureDecor];

	[arrayOfText removeAllObjects];

	

	// and so on until these lines

	NSLog(@"* %d", [appDelegate.eaglView isCurrentContext]);	
// -> the context is not _context

	[secondContext release];

	[EAGLContext setCurrentContext:appDelegate.eaglView._context];

	NSLog(@"* %d", [appDelegate.eaglView isCurrentContext]);	
// -> the context is _context

if([sender isKindOfClass:[RootViewController class]])

{

	RootViewController *root = (RootViewController*)sender;

	[root performEndOfLoading];

}

	return self;

}

Just to be sure we have the same EAGLView :

//The GL view is stored in the nib file. When it's unarchived it's sent -initWithCoder:

- (id)initWithCoder:(NSCoder*)coder {

	

	if ((self = [super initWithCoder:coder])) {

		CAEAGLLayer *eaglLayer = (CAEAGLLayer*)[self layer];

		

		[eaglLayer setDrawableProperties:[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:NO], kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGB565, kEAGLDrawablePropertyColorFormat, nil]];

		_format = kEAGLColorFormatRGB565;

		_depthFormat = 0;

		

		self._context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];

		[EAGLContext setCurrentContext:_context];



		if(_context == nil) {

			[self release];

			return nil;

		}

		

		if(![self _createSurface]) {

			[self release];

			return nil;

		}

	}

	

	return self;

}

So i can't understand why this is not working ?

Thanks !

See you

[bluelobster]

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