1 /* 2 * Copyright © 2010 Behdad Esfahbod 3 * Copyright © 2011,2012 Google, Inc. 4 * 5 * This is part of HarfBuzz, a text shaping library. 6 * 7 * Permission is hereby granted, without written agreement and without 8 * license or royalty fees, to use, copy, modify, and distribute this 9 * software and its documentation for any purpose, provided that the 10 * above copyright notice and the following two paragraphs appear in 11 * all copies of this software. 12 * 13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 17 * DAMAGE. 18 * 19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 24 * 25 * Google Author(s): Behdad Esfahbod 26 */ 27 28 #ifndef HB_SHAPE_OUTPUT_HH 29 #define HB_SHAPE_OUTPUT_HH 30 31 #include "shape-format.hh" 32 #include "output-options.hh" 33 34 35 struct shape_output_t : output_options_t<> 36 { add_optionsshape_output_t37 void add_options (option_parser_t *parser) 38 { 39 parser->set_summary ("Shape text with given font."); 40 output_options_t::add_options (parser, hb_buffer_serialize_list_formats ()); 41 format.add_options (parser); 42 } 43 initshape_output_t44 void init (hb_buffer_t *buffer, const font_options_t *font_opts) 45 { 46 gs = g_string_new (nullptr); 47 line_no = 0; 48 font = hb_font_reference (font_opts->font); 49 50 if (!output_format) 51 serialize_format = HB_BUFFER_SERIALIZE_FORMAT_TEXT; 52 else 53 serialize_format = hb_buffer_serialize_format_from_string (output_format, -1); 54 /* An empty "output_format" parameter basically skips output generating. 55 * Useful for benchmarking. */ 56 if ((!output_format || *output_format) && 57 !hb_buffer_serialize_format_to_string (serialize_format)) 58 { 59 if (explicit_output_format) 60 fail (false, "Unknown output format `%s'; supported formats are: %s", 61 output_format, 62 g_strjoinv ("/", const_cast<char**> (hb_buffer_serialize_list_formats ()))); 63 else 64 /* Just default to TEXT if not explicitly requested and the 65 * file extension is not recognized. */ 66 serialize_format = HB_BUFFER_SERIALIZE_FORMAT_TEXT; 67 } 68 69 unsigned int flags = HB_BUFFER_SERIALIZE_FLAG_DEFAULT; 70 if (!format.show_glyph_names) 71 flags |= HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES; 72 if (!format.show_clusters) 73 flags |= HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS; 74 if (!format.show_positions) 75 flags |= HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS; 76 if (!format.show_advances) 77 flags |= HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES; 78 if (format.show_extents) 79 flags |= HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS; 80 if (format.show_flags) 81 flags |= HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS; 82 serialize_flags = (hb_buffer_serialize_flags_t) flags; 83 84 if (format.trace) 85 hb_buffer_set_message_func (buffer, message_func, this, nullptr); 86 } new_lineshape_output_t87 void new_line () { line_no++; } consume_textshape_output_t88 void consume_text (hb_buffer_t *buffer, 89 const char *text, 90 unsigned int text_len, 91 hb_bool_t utf8_clusters) 92 { 93 g_string_set_size (gs, 0); 94 format.serialize_buffer_of_text (buffer, line_no, text, text_len, font, gs); 95 fprintf (out_fp, "%s", gs->str); 96 } errorshape_output_t97 void error (const char *message) 98 { 99 g_string_set_size (gs, 0); 100 format.serialize_message (line_no, "error", message, gs); 101 fprintf (out_fp, "%s", gs->str); 102 } consume_glyphsshape_output_t103 void consume_glyphs (hb_buffer_t *buffer, 104 const char *text, 105 unsigned int text_len, 106 hb_bool_t utf8_clusters) 107 { 108 g_string_set_size (gs, 0); 109 format.serialize_buffer_of_glyphs (buffer, line_no, text, text_len, font, 110 serialize_format, serialize_flags, gs); 111 fprintf (out_fp, "%s", gs->str); 112 } finishshape_output_t113 void finish (hb_buffer_t *buffer, const font_options_t *font_opts) 114 { 115 hb_buffer_set_message_func (buffer, nullptr, nullptr, nullptr); 116 hb_font_destroy (font); 117 g_string_free (gs, true); 118 gs = nullptr; 119 font = nullptr; 120 } 121 122 static hb_bool_t message_funcshape_output_t123 message_func (hb_buffer_t *buffer, 124 hb_font_t *font, 125 const char *message, 126 void *user_data) 127 { 128 shape_output_t *that = (shape_output_t *) user_data; 129 that->trace (buffer, font, message); 130 return true; 131 } 132 133 void traceshape_output_t134 trace (hb_buffer_t *buffer, 135 hb_font_t *font, 136 const char *message) 137 { 138 g_string_set_size (gs, 0); 139 format.serialize_line_no (line_no, gs); 140 g_string_append_printf (gs, "trace: %s buffer: ", message); 141 format.serialize (buffer, font, serialize_format, serialize_flags, gs); 142 g_string_append_c (gs, '\n'); 143 fprintf (stderr, "%s", gs->str); 144 } 145 146 147 protected: 148 149 shape_format_options_t format; 150 151 GString *gs = nullptr; 152 unsigned int line_no = 0; 153 hb_font_t *font = nullptr; 154 hb_buffer_serialize_format_t serialize_format = HB_BUFFER_SERIALIZE_FORMAT_INVALID; 155 hb_buffer_serialize_flags_t serialize_flags = HB_BUFFER_SERIALIZE_FLAG_DEFAULT; 156 }; 157 158 159 #endif 160