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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 bool
39 helper_cairo_scaled_font_has_color (cairo_scaled_font_t *scaled_font);
40 
41 extern const char *helper_cairo_supported_formats[];
42 
43 cairo_t *
44 helper_cairo_create_context (double w, double h,
45 			     view_options_t *view_opts,
46 			     output_options_t *out_opts,
47 			     cairo_content_t content);
48 
49 void
50 helper_cairo_destroy_context (cairo_t *cr);
51 
52 
53 struct helper_cairo_line_t {
54   cairo_glyph_t *glyphs;
55   unsigned int num_glyphs;
56   char *utf8;
57   unsigned int utf8_len;
58   cairo_text_cluster_t *clusters;
59   unsigned int num_clusters;
60   cairo_text_cluster_flags_t cluster_flags;
61 
finishhelper_cairo_line_t62   void finish (void) {
63     if (glyphs)
64       cairo_glyph_free (glyphs);
65     if (clusters)
66       cairo_text_cluster_free (clusters);
67     if (utf8)
68       g_free (utf8);
69   }
70 
get_advancehelper_cairo_line_t71   void get_advance (double *x_advance, double *y_advance) {
72     *x_advance = glyphs[num_glyphs].x;
73     *y_advance = glyphs[num_glyphs].y;
74   }
75 };
76 
77 void
78 helper_cairo_line_from_buffer (helper_cairo_line_t *l,
79 			       hb_buffer_t         *buffer,
80 			       const char          *text,
81 			       unsigned int         text_len,
82 			       int                  scale_bits,
83 			       hb_bool_t            utf8_clusters);
84 
85 #endif
86