251 lines
7.5 KiB
C
251 lines
7.5 KiB
C
/*
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* Copyright (C) 2007,2008 Red Hat, Inc.
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*
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* This is part of HarfBuzz, an OpenType Layout engine 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_H
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#define HB_OT_LAYOUT_H
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#include "hb-common.h"
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#include "hb-buffer.h"
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HB_BEGIN_DECLS();
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/*
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* hb_ot_layout_t
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*/
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typedef struct _hb_ot_layout_t hb_ot_layout_t;
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hb_ot_layout_t *
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hb_ot_layout_create (void);
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hb_ot_layout_t *
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hb_ot_layout_create_for_data (const char *font_data,
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int face_index);
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void
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hb_ot_layout_destroy (hb_ot_layout_t *layout);
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/* XXX */
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void
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hb_ot_layout_set_direction (hb_ot_layout_t *layout,
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hb_bool_t r2l);
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void
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hb_ot_layout_set_hinting (hb_ot_layout_t *layout,
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hb_bool_t hinted);
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void
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hb_ot_layout_set_scale (hb_ot_layout_t *layout,
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hb_16dot16_t x_scale, hb_16dot16_t y_scale);
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void
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hb_ot_layout_set_ppem (hb_ot_layout_t *layout,
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unsigned int x_ppem, unsigned int y_ppem);
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/* TODO sanitizing API/constructor (make_writable_func_t) */
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/* TODO get_table_func_t constructor */
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/*
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* GDEF
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*/
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typedef enum {
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HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0x0000,
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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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hb_bool_t
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hb_ot_layout_has_font_glyph_classes (hb_ot_layout_t *layout);
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hb_ot_layout_glyph_class_t
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hb_ot_layout_get_glyph_class (hb_ot_layout_t *layout,
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hb_codepoint_t glyph);
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void
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hb_ot_layout_set_glyph_class (hb_ot_layout_t *layout,
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hb_codepoint_t glyph,
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hb_ot_layout_glyph_class_t klass);
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void
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hb_ot_layout_build_glyph_classes (hb_ot_layout_t *layout,
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uint16_t num_total_glyphs,
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hb_codepoint_t *glyphs,
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unsigned char *klasses,
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uint16_t count);
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/*
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* GSUB/GPOS
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*/
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typedef enum {
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HB_OT_LAYOUT_TABLE_TYPE_GSUB,
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HB_OT_LAYOUT_TABLE_TYPE_GPOS,
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HB_OT_LAYOUT_TABLE_TYPE_NONE
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} hb_ot_layout_table_type_t;
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typedef uint32_t hb_ot_layout_feature_mask_t;
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#define HB_OT_LAYOUT_NO_SCRIPT_INDEX ((unsigned int) 0xFFFF)
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#define HB_OT_LAYOUT_NO_FEATURE_INDEX ((unsigned int) 0xFFFF)
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#define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX ((unsigned int) 0xFFFF)
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#define HB_OT_LAYOUT_TAG_DEFAULT_SCRIPT HB_TAG ('D', 'F', 'L', 'T')
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#define HB_OT_LAYOUT_TAG_DEFAULT_LANGUAGE HB_TAG ('d', 'f', 'l', 't')
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unsigned int
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hb_ot_layout_table_get_script_count (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type);
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hb_tag_t
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hb_ot_layout_table_get_script_tag (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index);
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hb_bool_t
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hb_ot_layout_table_find_script (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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hb_tag_t script_tag,
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unsigned int *script_index);
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unsigned int
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hb_ot_layout_table_get_feature_count (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type);
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hb_tag_t
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hb_ot_layout_table_get_feature_tag (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int feature_index);
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hb_bool_t
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hb_ot_layout_table_find_feature (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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hb_tag_t feature_tag,
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unsigned int *feature_index);
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unsigned int
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hb_ot_layout_table_get_lookup_count (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type);
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unsigned int
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hb_ot_layout_script_get_language_count (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index);
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hb_tag_t
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hb_ot_layout_script_get_language_tag (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index,
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unsigned int language_index);
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hb_bool_t
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hb_ot_layout_script_find_language (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index,
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hb_tag_t language_tag,
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unsigned int *language_index);
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hb_bool_t
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hb_ot_layout_language_get_required_feature_index (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index,
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unsigned int language_index,
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unsigned int *feature_index);
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unsigned int
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hb_ot_layout_language_get_feature_count (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index,
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unsigned int language_index);
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unsigned int
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hb_ot_layout_language_get_feature_index (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index,
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unsigned int language_index,
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unsigned int num_feature);
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hb_tag_t
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hb_ot_layout_language_get_feature_tag (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index,
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unsigned int language_index,
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unsigned int num_feature);
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hb_bool_t
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hb_ot_layout_language_find_feature (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int script_index,
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unsigned int language_index,
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hb_tag_t feature_tag,
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unsigned int *feature_index);
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unsigned int
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hb_ot_layout_feature_get_lookup_count (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int feature_index);
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unsigned int
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hb_ot_layout_feature_get_lookup_index (hb_ot_layout_t *layout,
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hb_ot_layout_table_type_t table_type,
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unsigned int feature_index,
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unsigned int num_lookup);
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/*
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* GSUB
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*/
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hb_bool_t
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hb_ot_layout_substitute_lookup (hb_ot_layout_t *layout,
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hb_buffer_t *buffer,
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unsigned int lookup_index,
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hb_ot_layout_feature_mask_t mask);
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hb_bool_t
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hb_ot_layout_position_lookup (hb_ot_layout_t *layout,
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hb_buffer_t *buffer,
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unsigned int lookup_index,
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hb_ot_layout_feature_mask_t mask);
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/*
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#define PANGO_OT_ALL_GLYPHS ((guint) 0xFFFF)
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*/
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HB_END_DECLS();
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#endif /* HB_OT_LAYOUT_H */
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