ofImage::setFromPixels() causes crash on iOS

@cuinjune wrote:

Hi, I just figured out calling ofImage::setFromPixels() causes crash on iOS while it works fine on MacOS.

Here's my test code.

ofFbo fbo;
ofImage img;

//--------------------------------------------------------------
void ofApp::setup(){

    ofSetBackgroundColor(0);

    //allocate an image space
    img.allocate(ofGetWidth(), ofGetHeight(), OF_IMAGE_COLOR_ALPHA);

    //clear and allocate a fbo
    fbo.begin();
    ofClear(0,0,0,0);
    fbo.end();
    fbo.allocate(ofGetWidth(), ofGetHeight(), GL_RGBA);

    //draw an ellipse to the fbo
    fbo.begin();
    ofClear(0,0,0,0);
    ofSetColor(255);
    ofDrawEllipse(ofGetWidth()/2, ofGetHeight()/2, ofGetWidth(), ofGetHeight());
    fbo.end();

    //copy pixels from fbo to image
    ofPixels pixels;
    fbo.getTexture().readToPixels(pixels);
    img.setFromPixels(pixels);
}

//--------------------------------------------------------------
void ofApp::update(){

}

//--------------------------------------------------------------
void ofApp::draw(){

    //draw the image
    img.draw(0, 0, ofGetWidth(), ofGetHeight());
}

And this is the result you will see if you run the code on MacOS.

Screen Shot 2017-10-27 at 12.07.02 AM.png800x638 7.62 KB

However, if you run the same code on iOS, it crashes on startup with the following error.

Screen Shot 2017-10-27 at 12.08.43 AM.png2880x1752 1.32 MB

It doesn't produce any error if I comment out img.setFromPixels(pixels);

Should I report this on github?
And Is there any other way to copy pixels from ofFbo to ofImage?
Thanks!

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