How should I use PGraphics with retina / HD displays?

helveticat

My client has a new Mac that uses the "retina" display. To support this, I added the following line in setup():

pixelDensity(displayDensity());

However, my code uses PGraphics objects defined as follows:

layers[0] = createGraphics( width, height);

(and so on for other layers).

I suspect the pixel density is not being inherited by the PGraphics objects in this instance. It's tough for me to debug this as I don't have access to an HD display so I am sending code back and forth to the client. My existing code runs fine on his old Mac (and every machine I have access to) but the layers are displaying at double size on the newer one.

Could someone provide some guidance to using Processing with displays where displayDensity() != 1?

BTW I tried explicitly using P2D in size() and createGraphics() as per a suggestion on another site but he gets an OpenGL error in that case (again, it works fine for me, but then so did my original code).

G_D

On a non-retina display, pixelDensity will be 1. On a retina display, it'll be 2.

I don't have any way to test this, but from the sound of what you are describing, that means PGraphics are coming out twice the size when code runs on a retina display.

So you may just need to test for displayDensity()>1 and then adjust the position/scale of any PGraphics accordingly?

GoToLoop

• The canvas itself is a PGraphics.
• createGraphics() doesn't inherit anything from main canvas.
• Each PGraphics got its own independent state.