iOS landscape orientation is drawn upside down

[liamlacey]

When setting the iOS orientation mode to landscape (90_LEFT or 90_RIGHT) the window is drawn upside down (meaning touch position 0,0 is at the bottom right instead of the top left).

I’ve tested this with iosOrientationExample with iOS release version 0.10.1, using an iPhone 8 running the latest iOS version.

[liamlacey]

I've added a workaround for this by adding the following to my touch functions in order to get the correct touch x and y values:

    if (ofGetOrientation() == OF_ORIENTATION_90_LEFT || ofGetOrientation() == OF_ORIENTATION_90_RIGHT)
    {
        touch.x = ofGetWidth() - touch.x;
        touch.y = ofGetHeight() - touch.y;
    }

However a second issue I've now found is that if I do a double tap it will call touchDoubleTap as expected but then also trigger a touchDown with the correct touch x and y values, which then means by above workaround won't work.

[ofTheo]

Thanks @liamlacey !
Do the graphics also seem flipped or is it just the touch points?

[liamlacey]

Hi ofTheo,
I seem to remember that the issue is that the whole window/view/graphics is being drawn upside down, but with the touch points being as they should be.

[liamlacey]

Resulting in the touch points being flipped compared to the view.

[ofTheo]

Thanks @liamlacey - I'll take a look!
Sounds like it should be easy to reproduce :)

[ofTheo]

@liamlacey I was able to reproduce on my end for both device and simulator.

Could you confirm that switching the (CGPoint)orientateTouchPoint:(CGPoint)touchPoint { in

ofxiOS/src/core/ofxiOSEAGLView.mm

to:

        case OF_ORIENTATION_90_RIGHT:
            touchPointOriented.x = touchPoint.y;
            touchPointOriented.y = ofGetHeight() - touchPoint.x;
            break;
            
        case OF_ORIENTATION_90_LEFT:
            touchPointOriented.x = ofGetWidth() - touchPoint.y;
            touchPointOriented.y = touchPoint.x;
            break;

Fixes the issue for you?
It seems to work correctly now for me now.

[ofTheo]

@danoli3

Here is a simple example to reproduce the bug.
I see it with both ofxiOSGLKView.mm and ofxiOSEAGLView.mm when hardware orientation is disabled.

I was going to switch both to as above - but just wanted to get your take first.
I remember OF_ORIENTATION_90_RIGHT/LEFT and the iOS equivalent was always a little tricky.

//--------------------------------------------------------------
void ofApp::setup(){	
	ofSetOrientation(OF_ORIENTATION_90_RIGHT);//Set iOS to Orientation Landscape Right
}

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

ofPoint lastTouchPt;
//--------------------------------------------------------------
void ofApp::draw(){
    
    ofSetColor(255, 0, 0);
    ofDrawCircle(ofGetMouseX(), ofGetMouseY(), 30);

    ofSetColor(0, 255, 0);
    ofDrawCircle(lastTouchPt.x, lastTouchPt.y, 30);
	
}

//--------------------------------------------------------------
void ofApp::touchDown(ofTouchEventArgs & touch){
    lastTouchPt = touch;
    
}