Null pointer exception with CCRenderTexture.renderTexture(int width, int height)

[agGitHub]

I just want to create a CRenderTexture with this simple code:

CCRenderTexture rt = CCRenderTexture.renderTexture(width, width);//width and height have the same values

But it returns a null pointer exception.

The issue occurs in the CCRenderTexture class when the object is initialized:

protected CCRenderTexture(int width, int height) { GL11ExtensionPack egl = (GL11ExtensionPack)CCDirector.gl; egl.glGetIntegerv(GL11ExtensionPack.GL_FRAMEBUFFER_BINDINGOES, oldFBO, 0); ///ETC.... }

Indeed, "CCDirector.gl" is equal to null which induces that "egl" is equal to null => crash on egl.glGetIntegerv(...).

Somebody knows how to fix this bug ? (which seems due to the Android Coco 2D framework)

Thanks !!!

[gwennguihal]

Try to instanciate your CCRenderTexture on the "render" (overrided) method.

[agGitHub]

I am new with Coco2D Android. Can you detail a little bit more what you mean ? Few lines àf code would be useful. Thanks !!

[gwennguihal]

public class MyNode extends CCNode { @Override public void onEnter() { super.onEnter(); CCRenderTexture rt = CCRenderTexture.renderTexture(textureSize, textureSize); //.... } }

Is it more comprehensible ? +

[agGitHub]

Thanks for your answer. Still not working :( (but I am really new with Coco2D Android !!)

Now I have got the following error:

12-14 15:43:47.883: E/AndroidRuntime(5013): java.lang.NullPointerException 12-14 15:43:47.883: E/AndroidRuntime(5013): at org.cocos2d.nodes.CCAtlasNode.calculateMaxItems(CCAtlasNode.java:86) 12-14 15:43:47.883: E/AndroidRuntime(5013): at org.cocos2d.nodes.CCAtlasNode.(CCAtlasNode.java:80) 12-14 15:43:47.883: E/AndroidRuntime(5013): at org.cocos2d.nodes.CCLabelAtlas.(CCLabelAtlas.java:41) 12-14 15:43:47.883: E/AndroidRuntime(5013): at org.cocos2d.nodes.CCLabelAtlas.label(CCLabelAtlas.java:36) 12-14 15:43:47.883: E/AndroidRuntime(5013): at org.cocos2d.nodes.CCDirector.setGLDefaultValues(CCDirector.java:600) 12-14 15:43:47.883: E/AndroidRuntime(5013): at org.cocos2d.nodes.CCDirector.onSurfaceCreated(CCDirector.java:644) 12-14 15:43:47.883: E/AndroidRuntime(5013): at org.cocos2d.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1209)

Here is my (very simple) code:

public class GameLayer extends CCColorLayer { private CCSprite _background;

public static CCScene scene()
{
    CCScene scene = CCScene.node();
    ccColor4B colorB4 = ccColor4B.ccc4(255, 255, 255, 255);
    CCColorLayer layer = new GameLayer(colorB4);
    scene.addChild(layer);

    return scene;
}

public void onEnter() { super.onEnter(); doBackground(); }

protected GameLayer(ccColor4B color) { super(color);

    this.setIsTouchEnabled(true);       
}

private void doBackground() {

ccColor4B myColor = ccColor4B.ccc4(255,255, 255,255);
ccColor4F bgColor = ccColor4F.ccc4FFromccc4B(myColor);

    _background =  spriteWithColor(bgColor, 512);    
    CGSize winSize = CCDirector.sharedDirector().winSize();
         _background.setPosition(winSize.width/2, winSize.height/2);        
    addChild(_background,-1);    
}

private CCSprite spriteWithColor(ccColor4F bgColor, int textureSize) {

  CCRenderTexture rt = CCRenderTexture.renderTexture(textureSize, textureSize);
  rt.clear(bgColor.r, bgColor.g, bgColor.b, bgColor.a);

      rt.end();

    return CCSprite.sprite((rt.getSprite()).getTexture());   
}

}

Thanks a lot for your help and sorry for my stupid questions... (my 2nd day with Coco 2D...)

[gwennguihal]

Without CCRenderTexture, does your code work ? Do you use the jar file or sources ? If sources, did you set "fps_images.png" in your asset folder ?

[agGitHub]

Thanks it works !!!!! You are a genius !! I can't believe it, so many hours lost just because of this stupid file...

I use the sources from ZhouWeikuan (not a jar). Is it the best choice ?

Thanks again for everything !