114 lines
3.0 KiB
C++
114 lines
3.0 KiB
C++
/*
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* Copyright (C) 2007,2008,2009 Red Hat, 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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* Red Hat Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_LAYOUT_PRIVATE_HH
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#define HB_OT_LAYOUT_PRIVATE_HH
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#include "hb-private.h"
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#include "hb-ot-layout.h"
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#include "hb-ot-head-private.hh"
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#include "hb-font-private.h"
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#include "hb-buffer-private.hh"
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HB_BEGIN_DECLS
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/* buffer var allocations */
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#define props_cache() var1.u16[0] /* glyph_props cache */
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typedef enum {
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HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0x0001,
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HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH = 0x0002,
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HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE = 0x0004,
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HB_OT_LAYOUT_GLYPH_CLASS_MARK = 0x0008,
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HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT = 0x0010
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} hb_ot_layout_glyph_class_t;
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/*
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* hb_ot_layout_t
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*/
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struct hb_ot_layout_t
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{
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hb_blob_t *gdef_blob;
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hb_blob_t *gsub_blob;
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hb_blob_t *gpos_blob;
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const struct GDEF *gdef;
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const struct GSUB *gsub;
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const struct GPOS *gpos;
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};
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struct hb_ot_layout_context_t
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{
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hb_face_t *face;
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hb_font_t *font;
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/* Convert from font-space to user-space */
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inline hb_position_t scale_x (int16_t v) { return scale (v, this->font->x_scale); }
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inline hb_position_t scale_y (int16_t v) { return scale (v, this->font->y_scale); }
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private:
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inline hb_position_t scale (int16_t v, unsigned int scale) { return v * (int64_t) scale / this->face->head_table->get_upem (); }
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};
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HB_INTERNAL hb_ot_layout_t *
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_hb_ot_layout_new (hb_face_t *face);
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HB_INTERNAL void
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_hb_ot_layout_free (hb_ot_layout_t *layout);
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/*
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* GDEF
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*/
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HB_INTERNAL unsigned int
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_hb_ot_layout_get_glyph_property (hb_face_t *face,
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hb_glyph_info_t *info);
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HB_INTERNAL hb_bool_t
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_hb_ot_layout_check_glyph_property (hb_face_t *face,
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hb_glyph_info_t *ginfo,
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unsigned int lookup_props,
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unsigned int *property_out);
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HB_INTERNAL hb_bool_t
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_hb_ot_layout_skip_mark (hb_face_t *face,
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hb_glyph_info_t *ginfo,
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unsigned int lookup_props,
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unsigned int *property_out);
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HB_END_DECLS
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#endif /* HB_OT_LAYOUT_PRIVATE_HH */
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