Method addImageAsyncCallBack

core/renderer/TextureCache.cpp:301–385

}

void TextureCache::addImageAsyncCallBack(float /*dt*/)
{
    Texture2D* texture       = nullptr;
    AsyncStruct* asyncStruct = nullptr;
    while (true)
    {
        // pop an AsyncStruct from response queue
        _responseMutex.lock();
        if (_responseQueue.empty())
        {
            asyncStruct = nullptr;
        }
        else
        {
            asyncStruct = _responseQueue.front();
            _responseQueue.pop_front();

            // the asyncStruct's sequence order in _asyncStructQueue must equal to the order in _responseQueue
            AX_ASSERT(asyncStruct == _asyncStructQueue.front());
            _asyncStructQueue.pop_front();
        }
        _responseMutex.unlock();

        if (nullptr == asyncStruct)
        {
            break;
        }

        // check the image has been convert to texture or not
        auto it = _textures.find(asyncStruct->filename);
        if (it != _textures.end())
        {
            texture = it->second;
        }
        else
        {
            // convert image to texture
            if (asyncStruct->loadSuccess)
            {
                Image* image = &(asyncStruct->image);
                // generate texture in render thread
                texture = new Texture2D();

                texture->initWithImage(image, asyncStruct->pixelFormat);
                // parse 9-patch info
                this->parseNinePatchImage(image, texture, asyncStruct->filename);
#if AX_ENABLE_CACHE_TEXTURE_DATA
                // cache the texture file name
                VolatileTextureMgr::addImageTexture(texture, asyncStruct->filename);
#endif
                // cache the texture. retain it, since it is added in the map
                _textures.emplace(asyncStruct->filename, texture);
                texture->retain();

                texture->autorelease();
                // ETC1 ALPHA supports.
                if (asyncStruct->imageAlpha.getFileType() == Image::Format::ETC1)
                {