Re: Fixed points not showing on plot. Fixed Plot_xcb.cc. Image results on my website, will do some tests.

[Dr . Jürgen Sauermann]

    Hi Mark,
    
    I have investigated the "point-size" problem and found out the
    following:
    
    On my 32-bit machine (where Plot_xcb.cc was mainly
    developed) the
    problem does not show.
    
    On my 64-bit system (where I hardly use Plot_xcb.cc) the
    problem
    shows up. As far as I can see, all xcb_fill_xxx()
    functions have that
    problem. The desired area, be it rectangles, polygons, or ellipses,
    is
    not filled with the colour set by XCB_GC_FOREGROUND (as they
    should IMHO), but is instead filled with the background color. Also,
    the window caption seems to be broken in the 64bit version (it
    worked
    better with the 32 bit version).
    
    I am afraid that I can't do anything about this (I tried but failed
    to
    find the source code for the xcb_fill_xxx() functions
    on the web).
    
    The gtk-3 version shows none of these problems and is the currently
    recommended version anyhow, so I would try to get that one working
    on your Mac.
    
    If anybody has a clue what all this is about then please let me
    know and I'll try to fix it.
    
    Best Regads,
    Jürgen

On 12/24/20 10:11 PM, gemesys@idirect.com wrote:

> Hi Jurgen;
> I've got a fix for the dot-points not plotting.
> I had to set point_style-1 or point_size-1 to zero to see plot line.
> If points were plotted, the data line would be blanked out.
>
> I fixed: Plot_xcb.cc
> Looks ok, but I want to run tests.
>
> I put  examples on my website:  http://www.gemesyscanada.com
>
> First image shows fixed results.
> Data points can be put on plot, and can also be made hollow.
>
> The libxcb stuff is nice, since I have it installed from source now
> on the Macbook, and it works with XQuartz (the X11 stuff for MacOSx).
>
> This means Linux boxes and Macbook can run same, and current version
> of GNU-APL.  This is good.
> This GNU-APL is really a fine thing. It is fine work, such good code.
> - Mark
>
> PS; Happy Christmas!
>
>
>

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