Bug 1097

Summary:	AWTGLReadBufferUtil.readPixelsToBufferedImage() causes exception on SWT
Product:	[JogAmp] Jogl	Reporter:	Paul <someuser>
Component:	core	Assignee:	Sven Gothel <sgothel>
Status:	UNCONFIRMED ---
Severity:	normal	CC:	mjames, sgothel
Priority:	---
Version:	2
Hardware:	pc_all
OS:	linux
Type:	---	SCM Refs:
Workaround:	---

Description Paul 2014-10-24 15:49:43 CEST

When org.eclipse.swt.opengl.GLCanvas is used together with capturing screenshot by AWTGLReadBufferUtil.readPixelsToBufferedImage() expection is thrown

javax.media.opengl.GLException: Should not call this
	at jogamp.opengl.windows.wgl.WindowsExternalWGLContext$Drawable.getSurfaceWidth(WindowsExternalWGLContext.java:133) ~[jogl-all-2.2.4.jar:2.2.4]
	at com.jogamp.opengl.util.awt.AWTGLReadBufferUtil.readPixelsToBufferedImage(AWTGLReadBufferUtil.java:94) ~[jogl-all-2.2.4.jar:2.2.4]
	at com.jogamp.opengl.util.awt.AWTGLReadBufferUtil.readPixelsToBufferedImage(AWTGLReadBufferUtil.java:71) ~[jogl-all-2.2.4.jar:2.2.4]

Windows x64, SWT 4.4, Java 1.8.0_20 (x64), JOGL 2.2.4

Comment 1 Michael James 2015-06-09 02:00:17 CEST

I am also experiencing this bug, and it is preventing my Eclipse RCP application from exporting a screenshot.   It may or may not be related to how I am using canvases and contexts, but finding this bug filed here gives me hope that I am using AWTGLReadBufferUtil and BufferedImage correctly.

This is with jogl 2.3.2 and Eclipse SWT.



GLProfile glp = GLProfile.getDefault();
AWTGLReadBufferUtil screenshot = new AWTGLReadBufferUtil(glp, false);
BufferedImage bi = screenshot.readPixelsToBufferedImage(gl, true);



com.jogamp.opengl.GLException: Should not call this
	at jogamp.opengl.x11.glx.X11ExternalGLXContext$Drawable.getSurfaceWidth(X11ExternalGLXContext.java:145)
	at com.jogamp.opengl.util.awt.AWTGLReadBufferUtil.readPixelsToBufferedImage(AWTGLReadBufferUtil.java:94)
	at com.jogamp.opengl.util.awt.AWTGLReadBufferUtil.readPixelsToBufferedImage(AWTGLReadBufferUtil.java:71)
	at com.raytheon.viz.core.gl.internal.GLTarget.screenshot(GLTarget.java:1248)