#3600: m.nviz.image doesn't produce any output
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Reporter: guano | Owner: grass-dev@…
Type: defect | Status: new
Priority: normal | Milestone:
Component: Default | Version: 7.0.4
Resolution: | Keywords:
CPU: Unspecified | Platform: MacOSX
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Comment (by hcho):
Only Windows defines double buffering; that's why Linux works without
buffer swapping because it has only one buffer. BUT, glGetError() still
returns GL_INVALID_OPERATION according to https://www.khronos.org/registry
/OpenGL-Refpages/gl4/html/glReadBuffer.xhtml. Probably, that's why some
Linux drivers and MacOS don't work at all.
Windows is also broken because nviz draws to the back buffer, but it reads
from the front buffer without buffer swapping.
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Ticket URL: <https://trac.osgeo.org/grass/ticket/3600#comment:54>
GRASS GIS <https://grass.osgeo.org>
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