1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-fallback-shape.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,139 @@
1.4 +/*
1.5 + * Copyright © 2011 Google, Inc.
1.6 + *
1.7 + * This is part of HarfBuzz, a text shaping library.
1.8 + *
1.9 + * Permission is hereby granted, without written agreement and without
1.10 + * license or royalty fees, to use, copy, modify, and distribute this
1.11 + * software and its documentation for any purpose, provided that the
1.12 + * above copyright notice and the following two paragraphs appear in
1.13 + * all copies of this software.
1.14 + *
1.15 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.16 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.17 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.18 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.19 + * DAMAGE.
1.20 + *
1.21 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.22 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.23 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.24 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.25 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.26 + *
1.27 + * Google Author(s): Behdad Esfahbod
1.28 + */
1.29 +
1.30 +#define HB_SHAPER fallback
1.31 +#include "hb-shaper-impl-private.hh"
1.32 +
1.33 +
1.34 +/*
1.35 + * shaper face data
1.36 + */
1.37 +
1.38 +struct hb_fallback_shaper_face_data_t {};
1.39 +
1.40 +hb_fallback_shaper_face_data_t *
1.41 +_hb_fallback_shaper_face_data_create (hb_face_t *face HB_UNUSED)
1.42 +{
1.43 + return (hb_fallback_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED;
1.44 +}
1.45 +
1.46 +void
1.47 +_hb_fallback_shaper_face_data_destroy (hb_fallback_shaper_face_data_t *data HB_UNUSED)
1.48 +{
1.49 +}
1.50 +
1.51 +
1.52 +/*
1.53 + * shaper font data
1.54 + */
1.55 +
1.56 +struct hb_fallback_shaper_font_data_t {};
1.57 +
1.58 +hb_fallback_shaper_font_data_t *
1.59 +_hb_fallback_shaper_font_data_create (hb_font_t *font HB_UNUSED)
1.60 +{
1.61 + return (hb_fallback_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
1.62 +}
1.63 +
1.64 +void
1.65 +_hb_fallback_shaper_font_data_destroy (hb_fallback_shaper_font_data_t *data HB_UNUSED)
1.66 +{
1.67 +}
1.68 +
1.69 +
1.70 +/*
1.71 + * shaper shape_plan data
1.72 + */
1.73 +
1.74 +struct hb_fallback_shaper_shape_plan_data_t {};
1.75 +
1.76 +hb_fallback_shaper_shape_plan_data_t *
1.77 +_hb_fallback_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
1.78 + const hb_feature_t *user_features HB_UNUSED,
1.79 + unsigned int num_user_features HB_UNUSED)
1.80 +{
1.81 + return (hb_fallback_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
1.82 +}
1.83 +
1.84 +void
1.85 +_hb_fallback_shaper_shape_plan_data_destroy (hb_fallback_shaper_shape_plan_data_t *data HB_UNUSED)
1.86 +{
1.87 +}
1.88 +
1.89 +
1.90 +/*
1.91 + * shaper
1.92 + */
1.93 +
1.94 +hb_bool_t
1.95 +_hb_fallback_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
1.96 + hb_font_t *font,
1.97 + hb_buffer_t *buffer,
1.98 + const hb_feature_t *features HB_UNUSED,
1.99 + unsigned int num_features HB_UNUSED)
1.100 +{
1.101 + /* TODO
1.102 + *
1.103 + * - Apply fallback kern.
1.104 + * - Handle Variation Selectors?
1.105 + * - Apply normalization?
1.106 + *
1.107 + * This will make the fallback shaper into a dumb "TrueType"
1.108 + * shaper which many people unfortunately still request.
1.109 + */
1.110 +
1.111 + bool has_space;
1.112 + hb_codepoint_t space;
1.113 + has_space = font->get_glyph (' ', 0, &space);
1.114 +
1.115 + buffer->clear_positions ();
1.116 +
1.117 + unsigned int count = buffer->len;
1.118 +
1.119 + for (unsigned int i = 0; i < count; i++)
1.120 + {
1.121 + if (has_space && buffer->unicode->is_default_ignorable (buffer->info[i].codepoint)) {
1.122 + buffer->info[i].codepoint = space;
1.123 + buffer->pos[i].x_advance = 0;
1.124 + buffer->pos[i].y_advance = 0;
1.125 + continue;
1.126 + }
1.127 + font->get_glyph (buffer->info[i].codepoint, 0, &buffer->info[i].codepoint);
1.128 + font->get_glyph_advance_for_direction (buffer->info[i].codepoint,
1.129 + buffer->props.direction,
1.130 + &buffer->pos[i].x_advance,
1.131 + &buffer->pos[i].y_advance);
1.132 + font->subtract_glyph_origin_for_direction (buffer->info[i].codepoint,
1.133 + buffer->props.direction,
1.134 + &buffer->pos[i].x_offset,
1.135 + &buffer->pos[i].y_offset);
1.136 + }
1.137 +
1.138 + if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
1.139 + hb_buffer_reverse (buffer);
1.140 +
1.141 + return true;
1.142 +}
