Hi, I’m trying to capture the image in an OpenGL window even when the window is partially or fully hidden by other windows. I can’t use glReadPixels in such a case, so is there any other way to directly grab the color values?
Thanks in advance.
Hi, I’m trying to capture the image in an OpenGL window even when the window is partially or fully hidden by other windows. I can’t use glReadPixels in such a case, so is there any other way to directly grab the color values?
Thanks in advance.
pixels that are hidden are by specification undefined, if you need to readback a whole rendered scene you should go for PBuffers for now… A new extension capable of rendering direct to textures are in progress but not done in a few month i guess.
Thanks – unfortunately I haven’t the foggiest idea about PBuffers. Would using PBuffers compromise on platform independence? Assuming that it wouldn’t, can anyone point me to a tutorial?