Note: Sorry about the links. I can't seem to use [url] tags.

Hi I've been working with the official cocos2d-iphone runtime for Objective-C and it's been working great so far. I have been having trouble trying to programmatically set an image on a spine animation. In short, what I would really like to do is to create a RegionAttachment from a dynamic UIImage/CCSprite and set it into an existing slot of my animation. I did some searching and found a thread that is similar to what I am trying to do: http://esotericsoftware.com/forum/viewtopic.php?f=7&t=1870

This thread lead me to another thread with an answer: http://esotericsoftware.com/forum/viewtopic.php?f=3&t=1554&p=7796&hilit=+cocos2d+attachment#p7627

I've been following the answer in this second thread, but I have been having trouble adapting it for the latest version of spine and cocos2d v3.4. I've been having two main problems.

1. ) The implementation in the answer in the second link above shows creating a CCTextureAtlas from a CCTexture2D in the following method:

   -(RegionAttachment*) regionWithTexture2d:(CCTexture2D*)tex2d name:(NSString*)_name{
       CCTextureAtlas *tex = [[CCTextureAtlas alloc] initWithTexture:tex2d capacity:128];
       ...

However in cocos2d v3.4, CCTextureAtlas has been retired. I've been trying to work around it by using a CCTexture instead and setting that directly as the renderObject, but I'm not sure if this is correct.

2.) The original implementation also created an AtlasPage with just a name before as follows:

AtlasPage *page = AtlasPage_create([_name UTF8String]);

However in the latest spine version, the AtlasPage_create() requires an Atlas and name as follows:

spAtlasPage* spAtlasPage_create (spAtlas* atlas, const char* name);

I'm not sure what to put as the atlas here. I've tried to put different things into spAtlas_create() or spAtlas_createFromFile(), but no matter what I do it just seems to crash.

Any help anyone can offer will be greatly appreciated! Thank you!

Hi James,

Thank you for your response. We've managed to get the app to not crash by using a image to create a spAtlas. However, now when we run it, the slot is now just blank. It sounds familiar to what you mentioned in your post about keeping the customized spAtlas around, but I'm not sure what that means exactly or how to keep it around since spAtlas is a struct. I've attached my code below for reference.

- (spRegionAttachment [i])regionWithTexture:(CCTexture[/i])tex2d name:(NSString*)name
{
    NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"png"];
    spAtlas *tex = spAtlas_createFromFile([path UTF8String], (__bridge void *)(tex2d));
    spAtlasPage *page = spAtlasPage_create(tex, [name UTF8String]);
    
page->width = tex2d.contentSizeInPixels.width;
page->height = tex2d.contentSizeInPixels.height;

spAtlasRegion *reg = spAtlasRegion_create();
reg->page = page;

spRegionAttachment *region = spRegionAttachment_create([name UTF8String]);
region->rendererObject = reg;

CGSize size = tex2d.contentSizeInPixels;
float u = 0;
float u2 = 1;
float v = 0;
float v2 = 1;
spRegionAttachment_setUVs(region,u,v,u2,v2,0);

spSlot *slot = [self.skeletonNode findSlot:name];
spRegionAttachment* attachment = (spRegionAttachment*)slot->attachment;

region->regionOffsetX = 0;
region->regionOffsetY = 0;
region->regionWidth = size.width;
region->regionHeight = size.height;
region->regionOriginalWidth = region->regionWidth; // same if not doing whitespace stripping
region->regionOriginalHeight = region->regionHeight;

region->x = attachment->x;
region->y = attachment->y;
region->scaleX = attachment->scaleX;
region->scaleY = attachment->scaleY;
region->rotation = attachment->rotation;
region->width = size.width;
region->height = size.height;
spRegionAttachment_updateOffset(region);

return region;
}

I've managed to get the image to show by setting rendererObject of the AtlasPage to the CCTexture, but now it shows for a split second before crashing. I added some breakpoints in the draw method of the SkeletonRenderer (where the crash occured) and discovered that the crash is due to the texture being nil on the slot with the custom attachment. For the first iteration of all the slots, the texture is there so the image appears. However, during the next iteration, the texture disappears and thus it crashes on setting the texture.

This sounds almost exactly like what James was describing with the CCTexture getting taken down. I'm still not sure what it means to keep the spAtlas around in order to prevent the texture from disappearing. Please advise! Thank you!

Yes! It turns out it was the __bridge cast that wasn't retaining the CCTexture. Replacing the cast with (void *)CFBridgingRetain(tex2d) fixed the problem. Thank you @jpoag for all your help!

To note, when using a CCSprite, the image would rotate and flip the image causing me to need to perform the opposite transformations on the image beforehand. However, if I just used a UIImage and CCTexture instead, I only needed to scale the image to the right size. I've attached my final code below.

Code for changing head to Icon.png:

UIImage *image = [UIImage imageNamed:@"Icon.png"];
CCTexture *texture = [[CCTexture alloc] initWithCGImage:image.CGImage contentScale:image.scale];
[self.skeletonNode setCCTexture:texture intoSlot:@"head"];

Extension on SkeletonAnimation:

- (bool)setCCTexture:(CCTexture *)texture intoSlot:(NSString *)slotName
{
    spRegionAttachment *reg = [self regionWithTexture:texture
                                                 name:slotName];
    spSlot *slot = [self findSlot:slotName];
    if (slot != nil && reg != nil) {
        spSlot_setAttachment(slot,(spAttachment *)reg);
        return true;
    } else {
        return false;
    }
    
return false;
}

- (spRegionAttachment *)regionWithTexture:(CCTexture *)tex2d name:(NSString *)name
{
    spAtlasPage *page = spAtlasPage_create(0, [name UTF8String]);
    page->rendererObject = (void *)CFBridgingRetain(tex2d);
    
    page->width = tex2d.contentSizeInPixels.width;
    page->height = tex2d.contentSizeInPixels.height;
    
    spAtlasRegion *reg = spAtlasRegion_create();
    reg->page = page;
    
    spRegionAttachment *region = spRegionAttachment_create([name UTF8String]);
    region->rendererObject = reg;
    
    CGSize size = tex2d.contentSizeInPixels;
    float u = 0;
    float u2 = 1;
    float v = 0;
    float v2 = 1;
    spRegionAttachment_setUVs(region,u,v,u2,v2,0);
    
    spSlot *slot = [self findSlot:name];
    spRegionAttachment* attachment = (spRegionAttachment*)slot->attachment;
    
    region->regionOffsetX = 0;
    region->regionOffsetY = 0;
    region->regionWidth = size.width;
    region->regionHeight = size.height;
    region->regionOriginalWidth = region->regionWidth; // same if not doing whitespace stripping
    region->regionOriginalHeight = region->regionHeight;
    
    region->x = attachment->x;
    region->y = attachment->y;
    region->scaleX = attachment->scaleX;
    region->scaleY = attachment->scaleY;
    region->rotation = attachment->rotation;
    region->width = size.width;
    region->height = size.height;
    spRegionAttachment_updateOffset(region);
    
    return region;
}

Thank you again for your help!