DPI/screen scaling when using OpenGL

[trickyflemming]

This may be related to a bug that I reported:

OpenGLContext, OS X, Plugins, and Scaling

JUCE 4.2, latest develop: We’re having a hell of a time adding interface scaling to our plug-ins. We’ve been using the SoundRadix fork for a while, but ran into this bug. We’ve switched to the main develop branch to try to troubleshoot this. So, we have a PluginEditor. We also have an OpenGLContext (continuous repaint enabled) that is attached to the editor. To do interface scaling, we’re resizing the window and applying an affine transform to scale the component. setSize(getPluginMainWidth()…

My best recommendation is using the SoundRadix branch, which has fixes for OpenGLContext scaling.

One thing we had to do as well: Don’t attach OpenGLContext to the top level component. Create a Component to hold your OpenGL Component, and attach the context to the OpenGL Component only. Between the SoundRadix fixes and that, we were able to fix our OpenGL issues.