| Bugs with hardware rendering [message #75017] |
Mon, 14 February 2011 10:21 |
penteado
Messages: 866
Registered: February 2018
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Senior Member
Administrator |
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Are there any fixes (or predictions to when there will be) for these
two bugs on hardware rendering?
1) With IDL 8, software rendering does not work from the IDLDE:
IDL> print,!version
{ x86_64 linux unix linux 8.0.1 Oct 7 2010 64 64}
IDL> p=plot(/test)
% Loaded DLM: XML.
% IDLITWINDOW::ONEXPOSE: Failure to acquire window rendering context.
% Unable to acquire device context.
% Error occurred at: GRAPHIC 22 /usr/local/itt/idl/idl80/
lib/graphics/graphic_error.pro
% PLOT 57 /usr/local/itt/idl/idl80/
lib/graphics/plot.pro
% $MAIN$
% Execution halted at: $MAIN$
But all is well with software rendering from the command line, and
hardware rendering on both. This is particularly troublesome because
it generates an inability to use the DE remotely. And troublesome
because of the next bug:
2) Surface rendering is markedly different between hardware and
software, *for certain data*. Very bad for making surfaces, as one
cannot set the lights properly in hardware rendering, as they will be
different on files created, and even the output of copywindow(). I had
to resort to doing a screen capture to make a bitmap.
This code shows problem (2). Note that the difference between the two
surfaces is just a constant factor (1d-15):
dx=1000
dy=1000
z1=randomu(seed,dx,dy,/normal,/double)
z1[*,dy/2]=1000d0+randomu(seed,dx,/normal,/double)*500d0
z2=z1*1d-15
s1=surface(z1,layout=[2,1,1])
s2=surface(z2,layout=[2,1,2],/current)
s_win=s1.copywindow()
im=image(s_win)
A screen capture of the hardware rendering of the s1,s2 objects is at
http://www.ppenteado.net/idl/surface_bug_capture.png
While the contents of the im object (made with the save method, with
an output that looks the same as I see on the screen) is at
http://www.ppenteado.net/idl/surface_bug_copywindow.png
In software rendering, what shows in the screen is the same as what is
made by the copywindow() and save methods.
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