[Octave-bug-tracker] [bug #48195] missing getframe function in gnuplot

[Philip Nienhuis]

Follow-up Comment #29, bug #48195 (project octave):

Just FTR, on Windows 7 64bit with a recently self-built mxe installer (64-bit)
I get:

>> test getframe
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression
unavailable
warning: opengl_renderer: Error 'invalid operation' (1282) occurred in
init_gl_context
warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing
'figure' object
Mesa warning: couldn't open dxtn.dll, software DXTn compression/decompression
unavailable
warning: opengl_renderer: Error 'invalid operation' (1282) occurred in
init_gl_context
warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing
'text' object
warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing
'patch' object
warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing
'axes' object
warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing
'figure' object
***** testif HAVE_OSMESA
 hf = figure ("visible", "off");
 unwind_protect
   hax = axes ("visible", "off", "position", [0 0 1 1]);
   verts = [0 0; .5 0; 1 0; ...
            0 .5; .5 .5; 1 .5; ...
            0 1; .5 1; 1 1];
   faces = [1 2 5 4; 2 3 6 5; 4 5 8 7; 5 6 9 8];
   fvc = [1 0 0; 0 1 0; 0 0 1; 1 0 1];
   patch ("vertices", verts, "faces", faces, "facevertexcdata", fvc, ...
          "facecolor", "flat");

   kk = 1;
   pos = get (hf, "position");

   for jj = [0.05 0.55]
     for ii = [0.05 0.55]
       rect = [ii jj .4 .4].*[pos(3:4) pos(3:4)];
       im = getframe (hax, rect).cdata;
       assert (im(:,:,1) == fvc(kk,1)*255)
       assert (im(:,:,2) == fvc(kk,2)*255)
       assert (im(:,:,3) == fvc(kk,3)*255)
       kk++;
     endfor
   endfor
 unwind_protect_cleanup
   close (hf)
 end_unwind_protect
!!!!! test failed
assert (im (:, :, 1) == fvc (kk, 1) * 255) failed
>>


Perhaps also the condition "if (! ispc) ..." could be added?

However, getframe works beautifully, I'm very glad you've implemented it
Pantxo! Thanks very much!


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