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 
29 #include <cairo.h>
30 
31 #ifndef HELPER_CAIRO_HH
32 #define HELPER_CAIRO_HH
33 
34 
35 cairo_scaled_font_t *
36 helper_cairo_create_scaled_font (const font_options_t *font_opts);
37 
38 extern const char *helper_cairo_supported_formats[];
39 
40 cairo_t *
41 helper_cairo_create_context (double w, double h,
42 			     view_options_t *view_opts,
43 			     output_options_t *out_opts);
44 
45 void
46 helper_cairo_destroy_context (cairo_t *cr);
47 
48 
49 struct helper_cairo_line_t {
50   cairo_glyph_t *glyphs;
51   unsigned int num_glyphs;
52   char *utf8;
53   unsigned int utf8_len;
54   cairo_text_cluster_t *clusters;
55   unsigned int num_clusters;
56   cairo_text_cluster_flags_t cluster_flags;
57 
finishhelper_cairo_line_t58   void finish (void) {
59     if (glyphs)
60       cairo_glyph_free (glyphs);
61     if (clusters)
62       cairo_text_cluster_free (clusters);
63     if (utf8)
64       g_free (utf8);
65   }
66 
get_advancehelper_cairo_line_t67   void get_advance (double *x_advance, double *y_advance) {
68     *x_advance = glyphs[num_glyphs].x;
69     *y_advance = glyphs[num_glyphs].y;
70   }
71 };
72 
73 void
74 helper_cairo_line_from_buffer (helper_cairo_line_t *l,
75 			       hb_buffer_t         *buffer,
76 			       const char          *text,
77 			       unsigned int         text_len,
78 			       int                  scale_bits,
79 			       hb_bool_t            utf8_clusters);
80 
81 #endif
82