Posted by jeffreportmill on Mar 02, 2023; 8:50pm
URL: https://forum.jogamp.org/Resize-offscreen-drawable-with-GLDrawableHelper-tp4042263.html

I work with JOGL exclusively through an offscreen drawable and BufferedImage.

When I need to resize the offscreen drawable, I call:

    drawable.getGL().getContext().makeCurrent();
    new GLDrawableHelper().reshape(drawable, 0, 0, aWidth, aHeight);

I mostly arrived at this through trial and error. It works, but occasionally the next drawable.display() throws and exception:

    com.jogamp.opengl.GLException: Caught IndexOutOfBoundsException:
        Required 1 remaining elements in buffer, only had 0 on thread AWT-EventQueue-0

So now I wrap my call to display in an exception handler. Any thoughts on what I'm doing wrong? Here are the source files:

    Create/resize Drawable: https://github.com/reportmill/SnapKitGL/blob/main/src/snapgl/DrawableUtils.java
    Drawable for BufferedImage: https://github.com/reportmill/SnapKitGL/blob/main/src/snapgl/RenderImage.java