CCTexture2D shown as white square while saved in a rapid function

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CCTexture2D shown as white square while saved in a rapid function

(8 posts) (2 voices)

Started 1 year ago by soprof
Latest reply from soprof

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soprof
Member
I have my AVCaptureSession configured and this function is called every time videoBuffer is refreshed:
```
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
       fromConnection:(AVCaptureConnection *)connection
```
I try to save my texture with:
```
CCTexture2D *CCtext = [CCTexture alloc] initWithData:rawImage pixelFormat:kCCTexture2DPixelFormat_RGBA8888 pixelsWide:width pixelsHigh:height contentSize:CGSizeMake(width, height)];
[Controller setCameraTexture:CCtext]
```
OR
```
globalCCTexture = [CCTexture alloc] initWithImage:rawImage];
[Controller setCameraTexture:globalCCTexture]
```
I also try to alloc memory in init function and only write here. I also try

[Controller performSelectorOnMainThread:@selector(setCameraTexture:) withObject: (id) globalCCTexture waitUntilDone:YES];

I Always get white texture inside my CCTexture2D. I have manually opened CGImage and filled graphical information with "0" [ black ] but i still have totally white square.

Fact 1: Capturing code is working in other project, without cocos2d with this drawing:

[self.imageView performSelectorOnMainThread:@selector(setImage:) withObject: (id) rawUIImage waitUntilDone:Yes];

Fact 2: If i just try to load a static resource in this function, i still get white screen in my CCTexture2d;
Fact 3: If i load a static resource in init of the same class - it works.

I guess it's some memory issue i don't understand.

Give me some ideas, please. I'm in despair. Spend like 15 hours non-stop on a 5-minute problem.
Posted 1 year ago #
araker
Moderator

The white squares are a indication that the loaded texture is invalid. What is your rawImage exactly? This thread shows how you can get the raw image data.

Posted 1 year ago #
soprof
Member

my rawData is raw data from CGImage provider and i know how to encapsulate it into UIImage - and it works in another project, without cocos2d.

I'm doing it allright, it's something else here.

Posted 1 year ago #
araker
Moderator

If you're sure that the data is valid, then another possibility is that there is no valid OpenGL context present at the moment you're creating the texture. Though normally that only happens when you're using OpenGL in another thread. Search the forum for 'white texture' to see how that's solved.

Posted 1 year ago #
soprof
Member

Ok i finally understood what were you talking about.

[[CCTextureCache sharedTextureCache] addImageAsync:@"s1.png" target:self selector:@selector(imageLoaded:)];
This works for me, but i need to load image not from file, and it wants only NSString as an argument.

How can i do the same, if i already have an UIImage or CCTexture2d object?

Posted 1 year ago #

soprof
Member

Code from CCTextureCache.m, maybe it can be changed somehow, so it "eats" normal UIImage/CCTexture2D Objects?

#pragma mark TextureCache - Add Images

-(void) addImageWithAsyncObject:(CCAsyncObject*)async
{
        NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];

        // textures will be created on the main OpenGL context
        // it seems that in SDK 2.2.x there can't be 2 threads creating textures at the same time
        // the lock is used for this purpose: issue #472
        [contextLock lock];
        if( auxEAGLcontext == nil ) {
                auxEAGLcontext = [[EAGLContext alloc]
                                                           initWithAPI:kEAGLRenderingAPIOpenGLES1
                                                           sharegroup:[[[[CCDirector sharedDirector] openGLView] context] sharegroup]];

                if( ! auxEAGLcontext )
                        CCLOG(@"cocos2d: TextureCache: Could not create EAGL context");
        }

        if( [EAGLContext setCurrentContext:auxEAGLcontext] ) {

                // load / create the texture
                CCTexture2D *tex = [self addImage:async.data];

                // The callback will be executed on the main thread
                [async.target performSelectorOnMainThread:async.selector withObject:tex waitUntilDone:NO];

                [EAGLContext setCurrentContext:nil];
        } else {
                CCLOG(@"cocos2d: TetureCache: EAGLContext error");
        }
        [contextLock unlock];

        [autoreleasepool release];
}

-(void) addImageAsync: (NSString*) filename target:(id)target selector:(SEL)selector
{
        NSAssert(filename != nil, @"TextureCache: fileimage MUST not be nill");

        // optimization

        CCTexture2D * tex;

        if( (tex=[textures objectForKey: filename] ) ) {
                [target performSelector:selector withObject:tex];
                return;
        }

        // schedule the load

        CCAsyncObject *asyncObject = [[CCAsyncObject alloc] init];
        asyncObject.selector = selector;
        asyncObject.target = target;
        asyncObject.data = filename;

        [NSThread detachNewThreadSelector:@selector(addImageWithAsyncObject:) toTarget:self withObject:asyncObject];
        [asyncObject release];
}

-(CCTexture2D*) addImage: (NSString*) path
{
        NSAssert(path != nil, @"TextureCache: fileimage MUST not be nill");

        CCTexture2D * tex = nil;

        // MUTEX:
        // Needed since addImageAsync calls this method from a different thread
        [dictLock lock];

        tex=[textures objectForKey: path];

        if( ! tex ) {

                // Split up directory and filename
                NSString *fullpath = [CCFileUtils fullPathFromRelativePath: path ];

                // all images are handled by UIImage except PVR extension that is handled by our own handler
                if ( [[path lowercaseString] hasSuffix:@".pvr"] )
                        tex = [self addPVRTCImage:fullpath];
                else {

                        // prevents overloading the autorelease pool
                        UIImage *image = [ [UIImage alloc] initWithContentsOfFile: fullpath ];
                        tex = [ [CCTexture2D alloc] initWithImage: image ];
                        [image release];

                        if( tex )
                                [textures setObject: tex forKey:path];
                        else
                                CCLOG(@"cocos2d: Couldn't add image:%@ in CCTextureCache", path);

                        [tex release];
                }
        }

        [dictLock unlock];

        return tex;
}

Posted 1 year ago #

soprof
Member

Seems tex is *CCTexture2d type, so if i change method declaration and

if( (tex=[textures objectForKey: filename] ) ) {
                [target performSelector:selector withObject:tex];
                return;
}

{
 [target performSelector:selector withObject:filename];
                return;
}

It'll take CCtexture2D object and do the rest.

Next question - how to change source code of cocos2d? :D

Posted 1 year ago #

soprof
Member

oki doki finally i've done what i wanted.

"spoiler":
~~~[under imports]:
static EAGLContext *auxGLcontext = nil;
later on, in the callbacking function:

if (auxGLContext == nil ) {
                            initWithAPI:kEAGLRenderingAPIOpenGLES1
                            sharegroup:[[[[CCDirector sharedDirector] openGLView] context] sharegroup]];
}

if ( [EAGLContext setCurrentContext:auxGLcontext] )

{
// CCTexture alloc init or whatever you want
[target_class performSelectorOnMainThread:@selector(target_function_in_target_class:) withObject:target_argument waitUntilDone:NO];
}

Posted 1 year ago #

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