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[Octave-bug-tracker] [bug #44338] __osmesa_print__ fails in MXE-Octave


From: John Donoghue
Subject: [Octave-bug-tracker] [bug #44338] __osmesa_print__ fails in MXE-Octave
Date: Fri, 8 Sep 2017 13:22:42 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.15063

Follow-up Comment #25, bug #44338 (project octave):

It doesn't seem to freeze every time, however both cause the freeze (when they
do). With the opengl compiled from mesa, it will allow me to attach in debug
and see where it segfaulted (whether it is valid or not)

The OS version of opengl just reports the stack was corrupted when I try
attaching.


using the OS's opengl (when It doesn't freeze):


- h = figure - no message

- plot (1:10, "o-") - no message

- print (h, "junk1.ps"),  the file is viewable

- set (h, "visible", "off"); - no message

- print (h, "junk.ps");

Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression
unavailable
GL2PS error: Incorrect viewport (x=0, y=198844792, width=0, height=198790600)
error: gl2ps_renderer::draw: gl2psBeginPage returned GL2PS_ERROR
error: called from
    __opengl_print__ at line 161 column 7
    print at line 521 column 14



It creates the file slightly smaller in size than the visible one, viewing the
file, it shows as just an empty page.



using mesa opengl:

- h = figure displays warning message: couldn't open dxtn.dll, software DXTn
compression/decompression unavailable

-  plot (1:10, "o-") shows Mesa: User error: GL_INVALID_ENUM in
glDisable(0x4008)

- print (h, "junk1.ps"), the file is viewable

- set (h, "visible", "off"); - no message

- print (h, "junk1.ps") displays:

Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression
unavailable
GL2PS error: Incorrect viewport (x=0, y=493109624, width=0, height=493108952)
error: gl2ps_renderer::draw: gl2psBeginPage returned GL2PS_ERROR
error: called from
    __opengl_print__ at line 161 column 7
    print at line 521 column 14

- file shows as a blank page


On the times that it does lock up, it 0 byte file.




at least when using out mesa opengl, it was built for 64 bits, however appears
to behave the same.

I have not tried a 32 bit version of octave for a while to verify if it
behaves the same.




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