126 lines
3.3 KiB
C++
126 lines
3.3 KiB
C++
/*
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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 "hb-shaper-impl.hh"
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#ifndef HB_NO_FALLBACK_SHAPE
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/*
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* shaper face data
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*/
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struct hb_fallback_face_data_t {};
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hb_fallback_face_data_t *
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_hb_fallback_shaper_face_data_create (hb_face_t *face HB_UNUSED)
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{
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return (hb_fallback_face_data_t *) HB_SHAPER_DATA_SUCCEEDED;
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}
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void
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_hb_fallback_shaper_face_data_destroy (hb_fallback_face_data_t *data HB_UNUSED)
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{
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}
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/*
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* shaper font data
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*/
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struct hb_fallback_font_data_t {};
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hb_fallback_font_data_t *
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_hb_fallback_shaper_font_data_create (hb_font_t *font HB_UNUSED)
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{
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return (hb_fallback_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
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}
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void
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_hb_fallback_shaper_font_data_destroy (hb_fallback_font_data_t *data HB_UNUSED)
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{
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}
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/*
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* shaper
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*/
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hb_bool_t
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_hb_fallback_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
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hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features HB_UNUSED,
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unsigned int num_features HB_UNUSED)
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{
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/* TODO
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*
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* - Apply fallback kern.
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* - Handle Variation Selectors?
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* - Apply normalization?
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*
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* This will make the fallback shaper into a dumb "TrueType"
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* shaper which many people unfortunately still request.
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*/
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hb_codepoint_t space;
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bool has_space = (bool) font->get_nominal_glyph (' ', &space);
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buffer->clear_positions ();
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hb_direction_t direction = buffer->props.direction;
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hb_unicode_funcs_t *unicode = buffer->unicode;
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unsigned int count = buffer->len;
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hb_glyph_info_t *info = buffer->info;
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hb_glyph_position_t *pos = buffer->pos;
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for (unsigned int i = 0; i < count; i++)
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{
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if (has_space && unicode->is_default_ignorable (info[i].codepoint)) {
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info[i].codepoint = space;
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pos[i].x_advance = 0;
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pos[i].y_advance = 0;
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continue;
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}
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(void) font->get_nominal_glyph (info[i].codepoint, &info[i].codepoint);
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font->get_glyph_advance_for_direction (info[i].codepoint,
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direction,
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&pos[i].x_advance,
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&pos[i].y_advance);
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font->subtract_glyph_origin_for_direction (info[i].codepoint,
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direction,
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&pos[i].x_offset,
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&pos[i].y_offset);
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}
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if (HB_DIRECTION_IS_BACKWARD (direction))
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hb_buffer_reverse (buffer);
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buffer->safe_to_break_all ();
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return true;
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}
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#endif
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