1 /* 2 * Copyright 2011 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 #include "helper-cairo.hh" 29 30 #ifndef VIEW_CAIRO_HH 31 #define VIEW_CAIRO_HH 32 33 34 struct view_cairo_t { 35 view_cairo_t (option_parser_t *parser) 36 : output_options (parser, helper_cairo_supported_formats), 37 view_options (parser) {} 38 ~view_cairo_t (void) { 39 if (debug) 40 cairo_debug_reset_static_data (); 41 } 42 43 void init (const font_options_t *font_opts) 44 { 45 lines = g_array_new (false, false, sizeof (helper_cairo_line_t)); 46 scale = double (view_options.font_size) / hb_face_get_upem (hb_font_get_face (font_opts->get_font ())); 47 } 48 void new_line (void) 49 { 50 } 51 void consume_text (hb_buffer_t *buffer, 52 const char *text, 53 unsigned int text_len, 54 hb_bool_t utf8_clusters) 55 { 56 } 57 void shape_failed (hb_buffer_t *buffer, 58 const char *text, 59 unsigned int text_len, 60 hb_bool_t utf8_clusters) 61 { 62 fail (false, "all shapers failed"); 63 } 64 void consume_glyphs (hb_buffer_t *buffer, 65 const char *text, 66 unsigned int text_len, 67 hb_bool_t utf8_clusters) 68 { 69 direction = hb_buffer_get_direction (buffer); 70 helper_cairo_line_t l; 71 helper_cairo_line_from_buffer (&l, buffer, text, text_len, scale, utf8_clusters); 72 g_array_append_val (lines, l); 73 } 74 void finish (const font_options_t *font_opts) 75 { 76 render (font_opts); 77 78 for (unsigned int i = 0; i < lines->len; i++) { 79 helper_cairo_line_t &line = g_array_index (lines, helper_cairo_line_t, i); 80 line.finish (); 81 } 82 g_array_unref (lines); 83 } 84 85 protected: 86 87 output_options_t output_options; 88 view_options_t view_options; 89 90 void render (const font_options_t *font_opts); 91 void get_surface_size (cairo_scaled_font_t *scaled_font, double *w, double *h); 92 void draw (cairo_t *cr); 93 94 hb_direction_t direction; // Remove this, make segment_properties accessible 95 GArray *lines; 96 double scale; 97 }; 98 99 #endif 100
