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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 				 double font_size);
     38 
     39 extern const char helper_cairo_supported_formats[];
     40 
     41 cairo_t *
     42 helper_cairo_create_context (double w, double h,
     43 			     view_options_t *view_opts,
     44 			     output_options_t *out_opts);
     45 
     46 void
     47 helper_cairo_destroy_context (cairo_t *cr);
     48 
     49 
     50 struct helper_cairo_line_t {
     51   cairo_glyph_t *glyphs;
     52   unsigned int num_glyphs;
     53   char *utf8;
     54   unsigned int utf8_len;
     55   cairo_text_cluster_t *clusters;
     56   unsigned int num_clusters;
     57   cairo_text_cluster_flags_t cluster_flags;
     58 
     59   void finish (void) {
     60     if (glyphs)
     61       cairo_glyph_free (glyphs);
     62     if (clusters)
     63       cairo_text_cluster_free (clusters);
     64     if (utf8)
     65       g_free (utf8);
     66   }
     67 
     68   void get_advance (double *x_advance, double *y_advance) {
     69     *x_advance = glyphs[num_glyphs].x;
     70     *y_advance = glyphs[num_glyphs].y;
     71   }
     72 };
     73 
     74 void
     75 helper_cairo_line_from_buffer (helper_cairo_line_t *l,
     76 			       hb_buffer_t         *buffer,
     77 			       const char          *text,
     78 			       unsigned int         text_len,
     79 			       double               scale,
     80 			       hb_bool_t            utf8_clusters);
     81 
     82 #endif
     83