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 { 36 view_cairo_t (option_parser_t *parser) 37 : output_options (parser, helper_cairo_supported_formats), 38 view_options (parser), 39 direction (HB_DIRECTION_INVALID), 40 lines (0), scale (1.0) {} 41 ~view_cairo_t (void) { 42 if (debug) 43 cairo_debug_reset_static_data (); 44 } 45 46 void init (const font_options_t *font_opts) 47 { 48 lines = g_array_new (false, false, sizeof (helper_cairo_line_t)); 49 scale = double (view_options.font_size) / hb_face_get_upem (hb_font_get_face (font_opts->get_font ())); 50 } 51 void new_line (void) 52 { 53 } 54 void consume_text (hb_buffer_t *buffer, 55 const char *text, 56 unsigned int text_len, 57 hb_bool_t utf8_clusters) 58 { 59 } 60 void shape_failed (hb_buffer_t *buffer, 61 const char *text, 62 unsigned int text_len, 63 hb_bool_t utf8_clusters) 64 { 65 fail (false, "all shapers failed"); 66 } 67 void consume_glyphs (hb_buffer_t *buffer, 68 const char *text, 69 unsigned int text_len, 70 hb_bool_t utf8_clusters) 71 { 72 direction = hb_buffer_get_direction (buffer); 73 helper_cairo_line_t l; 74 helper_cairo_line_from_buffer (&l, buffer, text, text_len, scale, utf8_clusters); 75 g_array_append_val (lines, l); 76 } 77 void finish (const font_options_t *font_opts) 78 { 79 render (font_opts); 80 81 for (unsigned int i = 0; i < lines->len; i++) { 82 helper_cairo_line_t &line = g_array_index (lines, helper_cairo_line_t, i); 83 line.finish (); 84 } 85 #if GLIB_CHECK_VERSION (2, 22, 0) 86 g_array_unref (lines); 87 #else 88 g_array_free (lines, TRUE); 89 #endif 90 } 91 92 protected: 93 94 output_options_t output_options; 95 view_options_t view_options; 96 97 void render (const font_options_t *font_opts); 98 void get_surface_size (cairo_scaled_font_t *scaled_font, double *w, double *h); 99 void draw (cairo_t *cr); 100 101 hb_direction_t direction; // Remove this, make segment_properties accessible 102 GArray *lines; 103 double scale; 104 }; 105 106 #endif 107
