HarfBuzz text shaping engine
http://harfbuzz.github.io/
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106 lines
3.1 KiB
106 lines
3.1 KiB
/* |
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* Copyright © 2011 Google, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#include "options.hh" |
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#include "helper-cairo.hh" |
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#ifndef VIEW_CAIRO_HH |
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#define VIEW_CAIRO_HH |
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struct view_cairo_t |
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{ |
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view_cairo_t (option_parser_t *parser) |
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: output_options (parser, helper_cairo_supported_formats), |
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view_options (parser), |
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direction (HB_DIRECTION_INVALID), |
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lines (0), scale (1.0) {} |
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~view_cairo_t (void) { |
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if (debug) |
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cairo_debug_reset_static_data (); |
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} |
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void init (const font_options_t *font_opts) |
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{ |
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lines = g_array_new (false, false, sizeof (helper_cairo_line_t)); |
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scale = double (view_options.font_size) / hb_face_get_upem (hb_font_get_face (font_opts->get_font ())); |
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} |
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void new_line (void) |
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{ |
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} |
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void consume_text (hb_buffer_t *buffer, |
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const char *text, |
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unsigned int text_len, |
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hb_bool_t utf8_clusters) |
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{ |
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} |
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void shape_failed (hb_buffer_t *buffer, |
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const char *text, |
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unsigned int text_len, |
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hb_bool_t utf8_clusters) |
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{ |
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fail (false, "all shapers failed"); |
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} |
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void consume_glyphs (hb_buffer_t *buffer, |
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const char *text, |
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unsigned int text_len, |
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hb_bool_t utf8_clusters) |
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{ |
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direction = hb_buffer_get_direction (buffer); |
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helper_cairo_line_t l; |
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helper_cairo_line_from_buffer (&l, buffer, text, text_len, scale, utf8_clusters); |
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g_array_append_val (lines, l); |
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} |
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void finish (const font_options_t *font_opts) |
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{ |
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render (font_opts); |
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for (unsigned int i = 0; i < lines->len; i++) { |
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helper_cairo_line_t &line = g_array_index (lines, helper_cairo_line_t, i); |
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line.finish (); |
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} |
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#if GLIB_CHECK_VERSION (2, 22, 0) |
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g_array_unref (lines); |
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#else |
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g_array_free (lines, TRUE); |
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#endif |
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} |
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protected: |
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output_options_t output_options; |
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view_options_t view_options; |
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void render (const font_options_t *font_opts); |
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void get_surface_size (cairo_scaled_font_t *scaled_font, double *w, double *h); |
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void draw (cairo_t *cr); |
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hb_direction_t direction; // Remove this, make segment_properties accessible |
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GArray *lines; |
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double scale; |
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}; |
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#endif
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