Error saving image in VR mode

[goddard@…]

The following bug report has been submitted:
Platform:        Darwin-18.5.0-x86_64-i386-64bit
ChimeraX Version: 0.9 (2019-05-02)
Description
Saving image in VR using snapshot icon causes this OpenGL error.

Log:
UCSF ChimeraX version: 0.9 (2019-05-02)  
© 2016-2019 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open 1a0m format mmCIF fromDatabase pdb

1a0m title:  
1.1 angstrom crystal structure of A-conotoxin [TYR15]-epi [more info...]  
  
Chain information for 1a0m #1  
---  
Chain | Description  
A B | α-conotoxin [TYR15]-epi  
  
Non-standard residues in 1a0m #1  
---  
NH2 — amino group  
  
  

> vr on

started SteamVR rendering  

> save /Users/goddard/Desktop/image1.png supersample 3

Traceback (most recent call last):  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/toolbar/tool.py", line 140, in <lambda>  
lambda e, what=what, self=self: self.handle_scheme(what),  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/toolbar/tool.py", line 89, in handle_scheme  
shortcuts.keyboard_shortcuts(self.session).run_shortcut(value)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/shortcuts/shortcuts.py", line 381, in run_shortcut  
sc.run(self.session, status = self._enabled)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/shortcuts/shortcuts.py", line 300, in run  
f(s)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/shortcuts/shortcuts.py", line 1018, in save_image  
run(session, cmd)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/commands/run.py", line 31, in run  
results = command.run(text, log=log)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/commands/cli.py", line 2631, in run  
result = ci.function(session, **kw_args)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/commands/save.py", line 61, in save  
fmt.export(session, filename, fmt.nicknames[0], **kw)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/io.py", line 213, in export  
result = self.export_func(session, path, **kw)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/image.py", line 150, in save_image  
transparent_background=transparent_background)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/view.py", line 415, in image  
srgba += r.frame_buffer_image(w, h)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/opengl.py", line 1123, in frame_buffer_image  
GL.glReadBuffer(b)  
File "/Users/goddard/Desktop/ChimeraX May 2
2019.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/PyOpenGL-3.1.3b2-py3.7.egg/OpenGL/platform/baseplatform.py", line
409, in __call__  
return self( *args, **named )  
File "src/errorchecker.pyx", line 53, in
OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError  
OpenGL.error.GLError: GLError(  
err = 1282,  
description = b'invalid operation',  
baseOperation = glReadBuffer,  
cArguments = (GL_COLOR_ATTACHMENT0,)  
)  
  
OpenGL.error.GLError: GLError(  
err = 1282,  
description = b'invalid operation',  
baseOperation = glReadBuffer,  
cArguments = (GL_COLOR_ATTACHMENT0,)  
)  
  
File "src/errorchecker.pyx", line 53, in
OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 ATI-2.8.38
OpenGL renderer: AMD Radeon Pro 580 OpenGL Engine
OpenGL vendor: ATI Technologies Inc.

[Tom Goddard]

Fixed.

OpenVR compositor submit() changed OpenGL read framebuffer.