Posted by Amey on Jul 14, 2015; 4:10am
URL: https://forum.jogamp.org/Showing-overview-of-image-viewer-tp4034879p4034890.html

Yes. At present I am doing the first option you suggested. That is, drawing the scaled down version of full image using SWT graphics on a composite (I take a snapshot of the GLCanvas and draw its scaled down version on the composite). But, I wanted to check if OpenGL has some easy way to achieve this. My image is tiled image, so the entire image consists of may textures arranged in grid. Drawing those all textures for the overview seems like lot of work.