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diff libinterp/corefcn/txt-eng.cc @ 17280:8ce6cdd272eb

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Support TeX elements in FreeType renderer. * libinterp/corefcn/txt-eng.cc: New file. Contains mapping from symbol name to character code, in Unicode and MS symbol. * libinterp/corefcn/modules.mk (COREFCN_SRC): Add txt-eng.cc. * libinterp/corefcn/oct-tex-lexer.ll: Add "\n" to rules applicable to ".", as the latter does not include new line characters. * libinterp/corefcn/oct-tex-parser.yy: Remove debug statements. * libinterp/corefcn/txt-eng.ft.cc (gripe_missing_glyph, gripe_glyph_render): Change signature from char to FT_ULong. (ft_render::ft_render): Adapt to new/removed members. (ft_render::~ft_render): Remove use of fonts member. (ft_render::set_font): Likewise. Use font instead. (ft_render::push_new_line): Likewise. Change meaning of yoffset and initialize line_yoffset. (ft_render::update_line_bbox): New method. (ft_render::set_mode): Change meaning of yoffset and initialize line_yoffset. (ft_render::process_character): New method. (ft_render::visit(text_element_string)): Use it. (ft_render::visit(text_element_list), ft_render::visit(text_element_subscript), ft_render::visit(text_element_superscript), ft_render::visit(text_element_color), ft_render::visit(text_element_fontsize), ft_render::visit(text_element_fontname), ft_render::visit(text_element_fontstyle), ft_render::visit(text_element_symbol)): New methods. (ft_render::set_color): Use color member instead of red/green/blue. * libinterp/corefcn/txt-eng-ft.h (ft_render::visit(text_element_list), ft_render::visit(text_element_subscript), ft_render::visit(text_element_superscript), ft_render::visit(text_element_color), ft_render::visit(text_element_fontsize), ft_render::visit(text_element_fontname), ft_render::visit(text_element_fontstyle), ft_render::visit(text_element_symbol)): New methods. (ft_render::update_line_bbox, ft_render::process_character): New methods. (ft_render::current_face): Removed method.i (ft_render::font): New member, replaces obsolete ft_render::fonts. (ft_render::line_yoffset): New member. (ft_render::color): New member, replaces obsolete red, green and blue. (ft_render::ft_font::ft_font()): Implement default constructor. (ft_render::ft_font::operator=): Fix incorrect use of FT_Reference_Face return value. (ft_render::ft_font::is_valid): New method. * libinterp/corefcn/txt-eng.h (class text_element_symbol, class text_element_fontname, class text_element_fontsize, class text_element_fontname, class text_element_fontstyle, class text_element_color): Add forward definition. (text_element_symbol::invalid_code): New enum. (text_element_symbol::code): New member. (text_element_symbol::text_element_symbol): Initialize it. (text_element_symbol::get_symbol_code): New method. (text_element_fontstyle::get_fontstyle): New method. (text_element_fontname::get_fontname): Renamed from fontname. (text_element_fontsize::get_fontsize): Renamed from fontsize.
author Michael Goffioul <michael.goffioul@gmail.com>
date Sun, 18 Aug 2013 16:36:46 -0400
parents
children ea23eb07f8ed
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new file mode 100644
--- /dev/null
+++ b/libinterp/corefcn/txt-eng.cc
@@ -0,0 +1,259 @@
+/*
+
+Copyright (C) 2013 Michael Goffioul
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+Octave 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "txt-eng.h"
+
+static const char* symbol_names[] = {
+    "alpha",
+    "beta",
+    "gamma",
+    "delta",
+    "epsilon",
+    "zeta",
+    "eta",
+    "theta",
+    "vartheta",
+    "iota",
+    "kappa",
+    "lambda",
+    "mu",
+    "nu",
+    "xi",
+    "pi",
+    "rho",
+    "sigma",
+    "varsigma",
+    "tau",
+    "equiv",
+    "Im",
+    "otimes",
+    "cap",
+    "supset",
+    "int",
+    "rfloor",
+    "lfloor",
+    "perp",
+    "wedge",
+    "rceil",
+    "vee",
+    "langle",
+
+    "upsilon",
+    "phi",
+    "chi",
+    "psi",
+    "omega",
+    "Gamma",
+    "Delta",
+    "Theta",
+    "Lambda",
+    "Xi",
+    "Pi",
+    "Sigma",
+    "Upsilon",
+    "Phi",
+    "Psi",
+    "Omega",
+    "forall",
+    "exists",
+    "ni",
+    "cong",
+    "approx",
+    "Re",
+    "oplus",
+    "cup",
+    "subseteq",
+    "in",
+    "lceil",
+    "cdot",
+    "neg",
+    "times",
+    "surd",
+    "varpi",
+    "rangle",
+
+    "leq",
+    "infty",
+    "clubsuit",
+    "diamondsuit",
+    "heartsuit",
+    "spadesuit",
+    "leftrightarrow",
+    "leftarrow",
+    "uparrow",
+    "rightarrow",
+    "downarrow",
+    "circ",
+    "pm",
+    "geq",
+    "propto",
+    "partial",
+    "bullet",
+    "div",
+    "neq",
+    "aleph",
+    "wp",
+    "oslash",
+    "supseteq",
+    "subset",
+    "o",
+    "nabla",
+    "ldots",
+    "prime",
+    "0",
+    "mid",
+    "copyright",
+
+    0
+};
+
+// Maps the symbol names (using index from symbol_names array) to
+// character codes, using 2 mapping:
+// - Unicode
+// - MS symbol (using Private Use Area)
+static uint32_t symbol_codes[][2] = {
+      { 0x03B1, 0xF061 },		// alpha
+      { 0x03B2, 0xF062 },		// beta
+      { 0x03B3, 0xF067 },		// gamma
+      { 0x03B4, 0xF064 },		// delta
+      { 0x03B5, 0xF065 },		// epsilon
+      { 0x03B6, 0xF07A },		// zeta
+      { 0x03B7, 0xF068 },		// eta
+      { 0x03B8, 0xF071 },		// theta
+      { 0x03D1, 0xF04A },		// vartheta
+      { 0x03B9, 0xF069 },		// iota
+      { 0x03BA, 0xF06B },		// kappa
+      { 0x03BB, 0xF06C },		// lambda
+      { 0x03BC, 0xF06D },		// mu
+      { 0x03BD, 0xF06E },		// nu
+      { 0x03BE, 0xF078 },		// xi
+      { 0x03C0, 0xF070 },		// pi
+      { 0x03C1, 0xF072 },		// rho
+      { 0x03C3, 0xF073 },		// sigma
+      { 0x03C2, 0xF056 },		// varsigma
+      { 0x03C4, 0xF074 },		// tau
+      { 0x2261, 0xF0BA },		// equiv
+      { 0x2111, 0xF0C1 },		// Im
+      { 0x2297, 0xF0C4 },		// otimes
+      { 0x2229, 0xF0C7 },		// cap
+      { 0x2283, 0xF0C9 },		// supset
+      { 0x222B, 0xF0F2 },		// int
+      { 0x230B, 0xF0FB },		// rfloor
+      { 0x230A, 0xF0EB },		// lfloor
+      { 0x22A5, 0xF05E },		// perp
+      { 0x2227, 0xF0D9 },		// wedge
+      { 0x2309, 0xF0F9 },		// rceil
+      { 0x2228, 0xF0DA },		// vee
+      { 0x2220, 0xF0E1 },		// langle
+
+      { 0x03C5, 0xF075 },		// upsilon
+      { 0x03C6, 0xF066 },		// phi
+      { 0x03C7, 0xF063 },		// chi
+      { 0x03C8, 0xF079 },		// psi
+      { 0x03C9, 0xF077 },		// omega
+      { 0x0393, 0xF047 },		// Gamma
+      { 0x0394, 0xF044 },		// Delta
+      { 0x0398, 0xF051 },		// Theta
+      { 0x039B, 0xF04C },		// Lambda
+      { 0x039E, 0xF058 },		// Xi
+      { 0x03A0, 0xF050 },		// Pi
+      { 0x03A3, 0xF053 },		// Sigma
+      { 0x03D2, 0xF055 },		// Upsilon
+      { 0x03A6, 0xF046 },		// Phi
+      { 0x03A8, 0xF059 },		// Psi
+      { 0x03A9, 0xF057 },		// Omega
+      { 0x2200, 0xF022 },		// forall
+      { 0x2203, 0xF024 },		// exists
+      { 0x220B, 0xF027 },		// ni
+      { 0x2245, 0xF040 },		// cong
+      { 0x2248, 0xF0BB },		// approx
+      { 0x211C, 0xF0C2 },		// Re
+      { 0x2295, 0xF0C5 },		// oplus
+      { 0x222A, 0xF0C8 },		// cup
+      { 0x2286, 0xF0CD },		// subseteq
+      { 0x2208, 0xF0CE },		// in
+      { 0x2308, 0xF0E9 },		// lceil
+      { 0x22C5, 0xF0D7 },		// cdot
+      { 0x00AC, 0xF0D8 },		// neg
+      { 0x00D7, 0xF0B4 },		// times
+      { 0x221A, 0xF0D6 },		// surd
+      { 0x03D6, 0xF076 },		// varpi
+      { 0x232A, 0xF0F1 },		// rangle
+
+      { 0x2264, 0xF0A3 },		// leq
+      { 0x221E, 0xF0A5 },		// infty
+      { 0x2663, 0xF0A7 },		// clubsuit
+      { 0x2666, 0xF0A8 },		// diamondsuit
+      { 0x2665, 0xF0A9 },		// heartsuit
+      { 0x2660, 0xF0AA },		// spadesuit
+      { 0x2194, 0xF0AB },		// leftrightarrow
+      { 0x2190, 0xF0AC },		// leftarrow
+      { 0x2191, 0xF0AD },		// uparrow
+      { 0x2192, 0xF0AE },		// rightarrow
+      { 0x2193, 0xF0AF },		// downarrow
+      { 0x25CB, 0xF0B0 },		// circ
+      { 0x00B1, 0xF0B1 },		// pm
+      { 0x2265, 0xF0B3 },		// geq
+      { 0x221D, 0xF0B5 },		// propto
+      { 0x2202, 0xF0B6 },		// partial
+      { 0x2022, 0xF0B7 },		// bullet
+      { 0x00F7, 0xF0B8 },		// div
+      { 0x2260, 0xF0B9 },		// neq
+      { 0x2135, 0xF0C0 },		// aleph
+      { 0x2118, 0xF0C3 },		// wp
+      { 0x2298, 0xF0C6 },		// oslash
+      { 0x2287, 0xF0CA },		// supseteq
+      { 0x2282, 0xF0CC },		// subset
+      { 0x03BF, 0xF0B0 },		// o
+      { 0x2207, 0xF0D1 },		// nabla
+      { 0x2026, 0xF0BC },		// ldots
+      { 0x2032, 0xF0A2 },		// prime
+      { 0x2205, 0xF0C6 },		// 0
+      { 0x2223, 0xF0BD },		// mid
+      { 0x00A9, 0xF0E3 },		// copyright
+
+      { 0, 0 }
+};
+
+uint32_t
+text_element_symbol::get_symbol_code (void)
+{
+  if (code == invalid_code)
+    {
+      std::string sym = string_value ();
+
+      for (int i = 0; symbol_names[i]; i++)
+        {
+          if (symbol_names[i] == sym)
+            {
+              code = symbol_codes[i][0];
+              break;
+            }
+        }
+    }
+
+  return code;
+}