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 : shaper (parser), 38 output (parser) {} 39 40 void init (const font_options_t *font_opts) 41 { 42 font = hb_font_reference (font_opts->get_font ()); 43 output.init (font_opts); 44 failed = false; 45 } 46 void consume_line (hb_buffer_t *buffer, 47 const char *text, 48 unsigned int text_len, 49 const char *text_before, 50 const char *text_after) 51 { 52 output.new_line (); 53 54 shaper.populate_buffer (buffer, text, text_len, text_before, text_after); 55 output.consume_text (buffer, text, text_len, shaper.utf8_clusters); 56 57 if (!shaper.shape (font, buffer)) { 58 failed = true; 59 hb_buffer_set_length (buffer, 0); 60 output.shape_failed (buffer, text, text_len, shaper.utf8_clusters); 61 return; 62 } 63 64 output.consume_glyphs (buffer, text, text_len, shaper.utf8_clusters); 65 } 66 void finish (const font_options_t *font_opts) 67 { 68 output.finish (font_opts); 69 hb_font_destroy (font); 70 font = NULL; 71 } 72 73 public: 74 bool failed; 75 76 protected: 77 shape_options_t shaper; 78 output_t output; 79 80 hb_font_t *font; 81 }; 82 83 84 #endif 85
