1 /* 2 * Copyright 2011,2012 Google, Inc. 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Google Author(s): Behdad Esfahbod 25 */ 26 27 #include "options.hh" 28 29 #ifndef HB_SHAPE_CONSUMER_HH 30 #define HB_SHAPE_CONSUMER_HH 31 32 33 template <typename output_t> 34 struct shape_consumer_t 35 { 36 shape_consumer_t (option_parser_t *parser) 37 : failed (false), 38 shaper (parser), 39 output (parser), 40 font (NULL) {} 41 42 void init (const font_options_t *font_opts) 43 { 44 font = hb_font_reference (font_opts->get_font ()); 45 output.init (font_opts); 46 failed = false; 47 } 48 void consume_line (hb_buffer_t *buffer, 49 const char *text, 50 unsigned int text_len, 51 const char *text_before, 52 const char *text_after) 53 { 54 output.new_line (); 55 56 for (unsigned int n = shaper.num_iterations; n; n--) 57 { 58 shaper.populate_buffer (buffer, text, text_len, text_before, text_after); 59 if (n == 1) 60 output.consume_text (buffer, text, text_len, shaper.utf8_clusters); 61 if (!shaper.shape (font, buffer)) { 62 failed = true; 63 hb_buffer_set_length (buffer, 0); 64 output.shape_failed (buffer, text, text_len, shaper.utf8_clusters); 65 return; 66 } 67 } 68 69 output.consume_glyphs (buffer, text, text_len, shaper.utf8_clusters); 70 } 71 void finish (const font_options_t *font_opts) 72 { 73 output.finish (font_opts); 74 hb_font_destroy (font); 75 font = NULL; 76 } 77 78 public: 79 bool failed; 80 81 protected: 82 shape_options_t shaper; 83 output_t output; 84 85 hb_font_t *font; 86 }; 87 88 89 #endif 90
