6 ; Uses current graphics device to draw a map of characters
7 ; available in the font specified in argument
13 ; showfont, num, 'title' ; table of font num entitled 'title'
16 ; /encapsulated ; ignored (just for compatibility)
17 ; /tt_font ; ignored (just for compatibility)
18 ; base = 16 ; number of columns in the table
19 ; beg = 32 ; first character
20 ; fin = num eq 3 ? 255 : 127 ; last character
32 ; Draws a font table on the current graphic device.
40 ; showfont, 9, 'GDL math symbols' ; show mappings for font 9
42 ; MODIFICATION HISTORY:
43 ; Written by: Sylwester Arabas (2008/12/28)
47 ; This program is free software; you can redistribute it and/or modify
48 ; it under the terms of the GNU General Public License as published by
49 ; the Free Software Foundation; either version 2 of the License, or
50 ; (at your option) any later version.
53 pro showfont, num, name, encapsulated=eps, tt_font=tt, base=base, beg=beg, fin=fin
55 ; handling default keyword values
56 if not keyword_set(base) then base = 16
57 if not keyword_set(beg) then beg = 32
58 if not keyword_set(fin) then fin = num eq 3 ? 255 : 127
59 if not keyword_set(name) then name = ''
61 ; constructing horizontal and vertical grid lines
62 n_hor = (fin + 1 - beg) / base + 1
63 h_x = (double(rebin(base * byte(128 * indgen(2 * (n_hor))) / 128, 4 * n_hor, /sample)))[1:4 * n_hor - 1] - .5
64 h_y = (double(rebin(beg + indgen(n_hor) * base, 4 * n_hor, /sample)))[0:4 * n_hor - 2] - base/2.
65 v_x = base - indgen(4 * base - 1) / 4 - .5
66 v_y = (double(rebin(byte(128 * indgen(2 * (base))) / 128, 4 * base, /sample)))[1:4 * base - 1] $
67 * base * ((fin + 1 - beg) / base) + beg - base / 2.
69 ; ploting grid and title
70 plot, [h_x, v_x], [h_y, v_y], $
71 title='Font ' + strtrim(string(num), 2) + ', ' + name, $
73 yrange=[base * ((fin + 1) / base), beg - base], $
76 xtitle='char mod ' + strtrim(string(base), 2), $
77 ytitle=strtrim(string(base), 2) + ' * (char / ' + strtrim(string(base), 2) + ')'
81 xyouts, (c mod base), base * (c / base), '!' + strtrim(string(num), 2) + string(byte(c))