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 #ifndef VIEW_CAIRO_HH 28 #define VIEW_CAIRO_HH 29 30 #include "hb-private.hh" 31 #include "options.hh" 32 #include "helper-cairo.hh" 33 34 35 struct view_cairo_t 36 { 37 view_cairo_t (option_parser_t *parser) 38 : output_options (parser, helper_cairo_supported_formats), 39 view_options (parser), 40 direction (HB_DIRECTION_INVALID), 41 lines (0), scale_bits (0) {} 42 ~view_cairo_t (void) { 43 if (debug) 44 cairo_debug_reset_static_data (); 45 } 46 47 void init (hb_buffer_t *buffer, const font_options_t *font_opts) 48 { 49 lines = g_array_new (false, false, sizeof (helper_cairo_line_t)); 50 scale_bits = -font_opts->subpixel_bits; 51 } 52 void new_line (void) 53 { 54 } 55 void consume_text (hb_buffer_t *buffer, 56 const char *text, 57 unsigned int text_len, 58 hb_bool_t utf8_clusters) 59 { 60 } 61 void error (const char *message) 62 { 63 g_printerr ("%s: %s\n", g_get_prgname (), message); 64 } 65 void consume_glyphs (hb_buffer_t *buffer, 66 const char *text, 67 unsigned int text_len, 68 hb_bool_t utf8_clusters) 69 { 70 direction = hb_buffer_get_direction (buffer); 71 helper_cairo_line_t l; 72 helper_cairo_line_from_buffer (&l, buffer, text, text_len, scale_bits, utf8_clusters); 73 g_array_append_val (lines, l); 74 } 75 void finish (hb_buffer_t *buffer, const font_options_t *font_opts) 76 { 77 render (font_opts); 78 79 for (unsigned int i = 0; i < lines->len; i++) { 80 helper_cairo_line_t &line = g_array_index (lines, helper_cairo_line_t, i); 81 line.finish (); 82 } 83 #if GLIB_CHECK_VERSION (2, 22, 0) 84 g_array_unref (lines); 85 #else 86 g_array_free (lines, TRUE); 87 #endif 88 } 89 90 protected: 91 92 output_options_t output_options; 93 view_options_t view_options; 94 95 void render (const font_options_t *font_opts); 96 97 hb_direction_t direction; // Remove this, make segment_properties accessible 98 GArray *lines; 99 int scale_bits; 100 }; 101 102 #endif 103
