PixelFormat RGBA4444 not working on version 2.2.2

PixelFormat RGBA4444 not working on version 2.2.2
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I have upgraded my application to cocos 2.2.2 and I cannot optimize the performance using RGBA4444. I tried editing _format: PixelFormat.RGBA8888 in the CCTexture2D.js file but it still doesn’t work. My app was not able to run on iPhone 6 and earlier devices. A lot of our users are complaining about this issue. Help me please

Help me please :frowning:

Hello, we don’t have any iPhone 6 equipment to test. Can you tell us the other equipment models that may have this problem?

Hello,
You don’t need use iPhone 6. I want using feature cc.Texture2D.setDefaultAlphaPixelFormat on version 2.2.2 like version 1.9.3
Please help me :frowning: