## Displays Greek letters and mathematically interesting Unicode ranges
## Copyright (C) 2005 Alan Irwin 
## Copyright (C) 2005 Andrew Ross 
##
##
## This file is part of PLplot.
##
## PLplot is free software; you can redistribute it and/or modify
## it under the terms of the GNU Library General Public License as published
## by the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## PLplot is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU Library General Public License for more details.
##
## You should have received a copy of the GNU Library General Public License
## along with PLplot; if not, write to the Free Software
## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
##

1;

## Displays Greek letters and mathematically interesting Unicode ranges

function ix23c(strm)
 
  # Redirect output to file if required
  if (nargin == 0)
    strm = stdout;
  endif


  Greek = [...
"#gA";"#gB";"#gG";"#gD";"#gE";"#gZ";"#gY";"#gH";"#gI";"#gK";"#gL";"#gM";
"#gN";"#gC";"#gO";"#gP";"#gR";"#gS";"#gT";"#gU";"#gF";"#gX";"#gQ";"#gW";
"#ga";"#gb";"#gg";"#gd";"#ge";"#gz";"#gy";"#gh";"#gi";"#gk";"#gl";"#gm";
"#gn";"#gc";"#go";"#gp";"#gr";"#gs";"#gt";"#gu";"#gf";"#gx";"#gq";"#gw";
	   ];

  Type1 = [...
0x0020,0x0021,0x0023,0x0025,0x0026,...
0x0028,0x0029,0x002b,0x002c,0x002e,...
0x002f,0x0030,0x0031,0x0032,0x0033,...
0x0034,0x0035,0x0036,0x0037,0x0038,...
0x0039,0x003a,0x003b,0x003c,0x003d,...
0x003e,0x003f,0x005b,0x005d,0x005f,...
0x007b,0x007c,0x007d,0x00a9,0x00ac,...
0x00ae,0x00b0,0x00b1,0x00d7,0x00f7,...
0x0192,0x0391,0x0392,0x0393,0x0394,...
0x0395,0x0396,0x0397,0x0398,0x0399,...
0x039a,0x039b,0x039c,0x039d,0x039e,...
0x039f,0x03a0,0x03a1,0x03a3,0x03a4,...
0x03a5,0x03a6,0x03a7,0x03a8,0x03a9,...
0x03b1,0x03b2,0x03b3,0x03b4,0x03b5,...
0x03b6,0x03b7,0x03b8,0x03b9,0x03ba,...
0x03bb,0x03bc,0x03bd,0x03be,0x03bf,...
0x03c0,0x03c1,0x03c2,0x03c3,0x03c4,...
0x03c5,0x03c6,0x03c7,0x03c8,0x03c9,...
0x03d1,0x03d2,0x03d5,0x03d6,0x2022,...
0x2026,0x2032,0x2033,0x203e,0x2044,...
0x2111,0x2118,0x211c,0x2122,0x2126,...
0x2135,0x2190,0x2191,0x2192,0x2193,...
0x2194,0x21b5,0x21d0,0x21d1,0x21d2,...
0x21d3,0x21d4,0x2200,0x2202,0x2203,...
0x2205,0x2206,0x2207,0x2208,0x2209,...
0x220b,0x220f,0x2211,0x2212,0x2215,...
0x2217,0x221a,0x221d,0x221e,0x2220,...
0x2227,0x2228,0x2229,0x222a,0x222b,...
0x2234,0x223c,0x2245,0x2248,0x2260,...
0x2261,0x2264,0x2265,0x2282,0x2283,...
0x2284,0x2286,0x2287,0x2295,0x2297,...
0x22a5,0x22c5,0x2320,0x2321,0x2329,...
0x232a,0x25ca,0x2660,0x2663,0x2665,...
0x2666,...
];

 title = {
"#<0x10>PLplot Example 23 - Greek Letters";
"#<0x10>PLplot Example 23 - Type 1 Symbol Font Glyphs by Unicode (a)";
"#<0x10>PLplot Example 23 - Type 1 Symbol Font Glyphs by Unicode (b)";
"#<0x10>PLplot Example 23 - Type 1 Symbol Font Glyphs by Unicode (c)";
"#<0x10>PLplot Example 23 - Number Forms Unicode Block";
"#<0x10>PLplot Example 23 - Arrows Unicode Block (a)";
"#<0x10>PLplot Example 23 - Arrows Unicode Block (b)";
"#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (a)";
"#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (b)";
"#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (c)";
"#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (d)"
};

 lo = [
0x0,
0x0,
0x40,
0x80,
0x2153,
0x2190,
0x21d0,
0x2200,
0x2240,
0x2280,
0x22c0,
];

 hi = [
0x30,
0x40,
0x80,
0xA6,
0x2184,
0x21d0,
0x2200,
0x2240,
0x2280,
0x22c0,
0x2300,
];

 nxcells = [
12,
8,
8,
8,
8,
8,
8,
8,
8,
8,
8,
];

nycells = [
8,
8,
8,
8,
8,
8,
8,
8,
8,
8,
8,
];

## non-zero values Must be consistent with nxcells and nycells.
offset = [
0,
0,
64,
128,
0,
0,
0,
0,
0,
0,
0,
];

## 30 possible FCI values.
FCI_COMBINATIONS = 30;

fci = [
0x80000000,
0x80000001,
0x80000002,
0x80000003,
0x80000004,
0x80000010,
0x80000011,
0x80000012,
0x80000013,
0x80000014,
0x80000020,
0x80000021,
0x80000022,
0x80000023,
0x80000024,
0x80000100,
0x80000101,
0x80000102,
0x80000103,
0x80000104,
0x80000110,
0x80000111,
0x80000112,
0x80000113,
0x80000114,
0x80000120,
0x80000121,
0x80000122,
0x80000123,
0x80000124,
];

family = [
  "sans-serif";
  "serif";
  "monospace";
  "script";
  "symbol"
];
style = [
  "upright";
  "italic";
  "oblique"
];
weight = [
  "medium";
  "bold"
];


## plparseopts(&argc, argv, PL_PARSE_FULL);

plinit;
    
for page=1:11

  pladv(0);

  ## Set up viewport and window

  plvpor(0.02, 0.98, 0.02, 0.90);
  plwind(0.0, 1.0, 0.0, 1.0);
  [xmin, xmax, ymin, ymax] = plgspa;
  plschr(0., 0.8);
  ycharacter_scale = (1.0 - 0.0)/(ymax-ymin);

  ## Factor should be 0.5, but heuristically it turns out to be larger.
  [chardef, charht] = plgchr;
  yoffset = 1.0*charht*ycharacter_scale;
  
  ## Draw the grid using plbox

  plcol0(2);

  deltax = 1.0/nxcells(page);
  deltay = 1.0/nycells(page);
  plbox("bcg", deltax, 0, "bcg", deltay, 0);
  plcol0(15);
  length=hi(page)-lo(page);
  slice = 0;
  for j=nycells(page)-1:-1:0;
    y = (0.5+j)*deltay;
    for i=0:nxcells(page)-1;
      x  = (0.5+i)*deltax;
      if (slice < length)
	if (page == 1) 
	  cmdString = sprintf("#%s",Greek(slice+1,:));
	elseif ((page >= 2) && (page <= 4))
 	  cmdString = sprintf("##[0x%.4x]",Type1(offset(page)+slice+1));
	elseif (page >= 5) 
	  cmdString = sprintf("##[0x%.4x]",lo(page)+slice);
	end
	strlen = size(cmdString)(2);
	plptex(x,y+yoffset,1.,0.,0.5, cmdString(2:strlen));
	plptex(x,y-yoffset,1.,0.,0.5, cmdString);
      end
      slice += 1;
    end
  end
    
  plschr(0., 1.0);
  ## Page title
  plmtex("t", 1.5, 0.5, 0.5, title(page,:));
  
end

## Demonstrate methods of getting the current fonts
fci_old = plgfci();
[ifamily,istyle,iweight] = plgfont();
fprintf(strm,"For example 23 prior to page 12 the FCI is 0x%x\n",fci_old);
fprintf(strm,"For example 23 prior to page 12 the font family, style and weight are %s %s %s\n",deblank(family(ifamily+1,:)), deblank(style(istyle+1,:)), deblank(weight(iweight+1,:)));

for page=11:15
  dy = 0.030;

  pladv(0);
  plvpor(0.02, 0.98, 0.02, 0.90);
  plwind(0.0, 1.0, 0.0, 1.0);
  plsfci(0);
  if (page == 11) 
    plmtex("t", 1.5, 0.5, 0.5,"#<0x10>PLplot Example 23 - Set Font with plsfci");
  elseif (page == 12) 
    plmtex("t", 1.5, 0.5, 0.5,"#<0x10>PLplot Example 23 - Set Font with plsfont");
  elseif (page == 13) 
    plmtex("t", 1.5, 0.5, 0.5,"#<0x10>PLplot Example 23 - Set Font with ##<0x8nnnnnnn> construct");
  elseif(page == 14)
    plmtex("t", 1.5, 0.5, 0.5,"#<0x10>PLplot Example 23 - Set Font with ##<0xmn> constructs");
  elseif(page == 15)
    plmtex("t", 1.5, 0.5, 0.5,"#<0x10>PLplot Example 23 - Set Font with ##<FCI COMMAND STRING/> constructs");
  endif
  plschr(0., 0.75);
  for i = 0:FCI_COMBINATIONS-1
    family_index = mod(i,5);
    style_index = mod(floor(i/5),3);
    weight_index = mod(floor((i/5)/3),2);
    if(page == 11)
      plsfci(fci(i+1));
      string = sprintf("Page 12, %s, %s, %s:  The quick brown fox jumps over the lazy dog",deblank(family(family_index+1,:)),deblank(style(style_index+1,:)),deblank(weight(weight_index+1,:)));
    elseif(page == 12)
      plsfont(family_index, style_index, weight_index);
      string = sprintf("Page 13, %s, %s, %s:  The quick brown fox jumps over the lazy dog",deblank(family(family_index+1,:)),deblank(style(style_index+1,:)),deblank(weight(weight_index+1,:)));
    elseif(page == 13)
      string = sprintf("Page 14, %s, %s, %s:  #<0x%x>The quick brown fox jumps over the lazy dog",deblank(family(family_index+1,:)),deblank(style(style_index+1,:)),deblank(weight(weight_index+1,:)),fci(i+1));
    elseif(page == 14)
      string = sprintf("Page 15, %s, %s, %s:  #<0x%1x0>#<0x%1x1>#<0x%1x2>The quick brown fox jumps over the lazy dog",deblank(family(family_index+1,:)),deblank(style(style_index+1,:)),deblank(weight(weight_index+1,:)),family_index,style_index,weight_index);
    elseif(page == 15)
      string = sprintf("Page 16, %s, %s, %s:  #<%s/>#<%s/>#<%s/>The quick brown fox jumps over the lazy dog",deblank(family(family_index+1,:)),deblank(style(style_index+1,:)),deblank(weight(weight_index+1,:)),deblank(family(family_index+1,:)),deblank(style(style_index+1,:)),deblank(weight(weight_index+1,:)));
    endif
    plptex (0., 1. - (i+0.5)*dy, 1., 0., 0., string);
  endfor
  plschr(0., 1.0);
endfor

## Restore defaults
plcol0(1);

plend1;

end

if (exist("strm","var"))
  ix23c(strm);
else
  ix23c();
endif

