[Octave-bug-tracker] [bug #43907] OpenGL render code called even when gnuplot is graphics_toolkit

[Dan Sebald]

Follow-up Comment #11, bug #43907 (project octave):

What is the issue?  Is it the warning message?

warning: ft_render: skipping missing glyph for character '2205'

I was assuming that there is simply no glyph in whatever font set is chosen
for character ' ', which I think means character 0.  Typically those low
numbers are dodgy as far as glyphs, as ASCII alpha-numeric glyphs usually
start much higher in the code book.  Why the code 2205 comes from ' ', I have
no idea.

ft_render means font render, which is in txt-eng-ft.cc.  


FT_UInt
ft_render::process_character (FT_ULong code, FT_UInt previous)
{
  FT_Face face = font.get_face ();
  FT_UInt glyph_index = 0;

  if (face)
    {
      glyph_index = FT_Get_Char_Index (face, code);

      if (code != 'n'
          && (! glyph_index
              || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT)))
        {
          glyph_index = 0;
          gripe_missing_glyph (code);
        }
      else


Is that code related to OpenGL or just generic font rendering without
reference to the destination of the font usage?  I don't see what the OpenGL
issue is.  You'll have to explain further.

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