<commit_before>/*
 * Copyright (C) 2007,2008,2009  Red Hat, Inc.
 *
 *  This is part of HarfBuzz, an OpenType Layout engine library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Red Hat Author(s): <NAME>
 */

#ifndef HB_OT_LAYOUT_H
#define HB_OT_LAYOUT_H

#include "hb-common.h"
#include "hb-buffer.h"
#include "hb-font.h"

HB_BEGIN_DECLS

#define HB_OT_TAG_GDEF HB_TAG('G','D','E','F')
#define HB_OT_TAG_GSUB HB_TAG('G','S','U','B')
#define HB_OT_TAG_GPOS HB_TAG('G','P','O','S')

/*
 * GDEF
 */

typedef enum {
  HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED	= 0x0000,
  HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH	= 0x0002,
  HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE	= 0x0004,
  HB_OT_LAYOUT_GLYPH_CLASS_MARK		= 0x0008,
  HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT	= 0x0010
} hb_ot_layout_glyph_class_t;

/* XXX These should eventually be removed as we move synthesized glyph
 * classes in harfbuzz. */

hb_bool_t
hb_ot_layout_has_font_glyph_classes (hb_face_t *face);

hb_ot_layout_glyph_class_t
hb_ot_layout_get_glyph_class (hb_face_t      *face,
			      hb_codepoint_t  glyph);

void
hb_ot_layout_set_glyph_class (hb_face_t                 *face,
			      hb_codepoint_t             glyph,
			      hb_ot_layout_glyph_class_t klass);

void
hb_ot_layout_build_glyph_classes (hb_face_t      *face,
				uint16_t        num_total_glyphs,
				hb_codepoint_t *glyphs,
				unsigned char  *klasses,
				uint16_t        count);

/* Not that useful.  Provides list of attach points for a glyph that a
 * client may want to cache */
hb_bool_t
hb_ot_layout_get_attach_points (hb_face_t      *face,
				hb_codepoint_t  glyph,
				unsigned int   *point_count /* IN/OUT */,
				unsigned int   *point_array /* OUT */);

/* Ligature caret positions */
hb_bool_t
hb_ot_layout_get_lig_carets (hb_face_t      *face,
			     hb_font_t      *font,
			     hb_codepoint_t  glyph,
			     unsigned int   *caret_count /* IN/OUT */,
			     int            *caret_array /* OUT */);


/*
 * GSUB/GPOS feature query and enumeration interface
 */

#define HB_OT_LAYOUT_NO_SCRIPT_INDEX		((unsigned int) 0xFFFF)
#define HB_OT_LAYOUT_NO_FEATURE_INDEX		((unsigned int) 0xFFFF)
#define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX	((unsigned int) 0xFFFF)
#define HB_OT_LAYOUT_TAG_DEFAULT_SCRIPT		HB_TAG ('D', 'F', 'L', 'T')
#define HB_OT_LAYOUT_TAG_DEFAULT_LANGUAGE	HB_TAG ('d', 'f', 'l', 't')

hb_bool_t
hb_ot_layout_table_get_script_tags (hb_face_t    *face,
				    hb_tag_t      table_tag,
				    unsigned int *script_count /* IN/OUT */,
				    hb_tag_t     *script_tags /* OUT */);

hb_bool_t
hb_ot_layout_table_find_script (hb_face_t    *face,
				hb_tag_t      table_tag,
				hb_tag_t      script_tag,
				unsigned int *script_index);

hb_bool_t
hb_ot_layout_table_get_feature_tags (hb_face_t    *face,
				     hb_tag_t      table_tag,
				     unsigned int *feature_count /* IN/OUT */,
				     hb_tag_t     *feature_tags /* OUT */);

hb_bool_t
hb_ot_layout_script_get_language_tags (hb_face_t    *face,
				       hb_tag_t      table_tag,
				       unsigned int  script_index,
				       unsigned int *language_count /* IN/OUT */,
				       hb_tag_t     *language_tags /* OUT */);

hb_bool_t
hb_ot_layout_script_find_language (hb_face_t    *face,
				   hb_tag_t      table_tag,
				   unsigned int  script_index,
				   hb_tag_t      language_tag,
				   unsigned int *language_index);

hb_bool_t
hb_ot_layout_language_get_required_feature_index (hb_face_t    *face,
						  hb_tag_t      table_tag,
						  unsigned int  script_index,
						  unsigned int  language_index,
						  unsigned int *feature_index);

hb_bool_t
hb_ot_layout_language_get_feature_indexes (hb_face_t    *face,
					   hb_tag_t      table_tag,
					   unsigned int  script_index,
					   unsigned int  language_index,
					   unsigned int *feature_count /* IN/OUT */,
					   unsigned int *feature_indexes /* OUT */);

hb_bool_t
hb_ot_layout_language_get_feature_tags (hb_face_t    *face,
					hb_tag_t      table_tag,
					unsigned int  script_index,
					unsigned int  language_index,
					unsigned int *feature_count /* IN/OUT */,
					hb_tag_t     *feature_tags /* OUT */);

hb_bool_t
hb_ot_layout_language_find_feature (hb_face_t    *face,
				    hb_tag_t      table_tag,
				    unsigned int  script_index,
				    unsigned int  language_index,
				    hb_tag_t      feature_tag,
				    unsigned int *feature_index);

hb_bool_t
hb_ot_layout_feature_get_lookup_indexes (hb_face_t    *face,
					 hb_tag_t      table_tag,
					 unsigned int  feature_index,
					 unsigned int *lookup_count /* IN/OUT */,
					 unsigned int *lookup_indexes /* OUT */);


/*
 * GSUB
 */

hb_bool_t
hb_ot_layout_has_substitution (hb_face_t *face);

hb_bool_t
hb_ot_layout_substitute_lookup (hb_face_t    *face,
				hb_buffer_t  *buffer,
				unsigned int  lookup_index,
				hb_mask_t     mask);

/*
 * GPOS
 */

hb_bool_t
hb_ot_layout_has_positioning (hb_face_t *face);

hb_bool_t
hb_ot_layout_position_lookup   (hb_face_t    *face,
				hb_font_t    *font,
				hb_buffer_t  *buffer,
				unsigned int  lookup_index,
				hb_mask_t     mask);


HB_END_DECLS

#endif /* HB_OT_LAYOUT_H */
<commit_msg>[HB] Indent<commit_after>/*
 * Copyright (C) 2007,2008,2009  Red Hat, Inc.
 *
 *  This is part of HarfBuzz, an OpenType Layout engine library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Red Hat Author(s): <NAME>
 */

#ifndef HB_OT_LAYOUT_H
#define HB_OT_LAYOUT_H

#include "hb-common.h"
#include "hb-buffer.h"
#include "hb-font.h"

HB_BEGIN_DECLS

#define HB_OT_TAG_GDEF HB_TAG('G','D','E','F')
#define HB_OT_TAG_GSUB HB_TAG('G','S','U','B')
#define HB_OT_TAG_GPOS HB_TAG('G','P','O','S')

/*
 * GDEF
 */

typedef enum {
  HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED	= 0x0000,
  HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH	= 0x0002,
  HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE	= 0x0004,
  HB_OT_LAYOUT_GLYPH_CLASS_MARK		= 0x0008,
  HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT	= 0x0010
} hb_ot_layout_glyph_class_t;

/* XXX These should eventually be removed as we move synthesized glyph
 * classes in harfbuzz. */

hb_bool_t
hb_ot_layout_has_font_glyph_classes (hb_face_t *face);

hb_ot_layout_glyph_class_t
hb_ot_layout_get_glyph_class (hb_face_t      *face,
			      hb_codepoint_t  glyph);

void
hb_ot_layout_set_glyph_class (hb_face_t                 *face,
			      hb_codepoint_t             glyph,
			      hb_ot_layout_glyph_class_t klass);

void
hb_ot_layout_build_glyph_classes (hb_face_t      *face,
				  uint16_t        num_total_glyphs,
				  hb_codepoint_t *glyphs,
				  unsigned char  *klasses,
				  uint16_t        count);

/* Not that useful.  Provides list of attach points for a glyph that a
 * client may want to cache */
hb_bool_t
hb_ot_layout_get_attach_points (hb_face_t      *face,
				hb_codepoint_t  glyph,
				unsigned int   *point_count /* IN/OUT */,
				unsigned int   *point_array /* OUT */);

/* Ligature caret positions */
hb_bool_t
hb_ot_layout_get_lig_carets (hb_face_t      *face,
			     hb_font_t      *font,
			     hb_codepoint_t  glyph,
			     unsigned int   *caret_count /* IN/OUT */,
			     int            *caret_array /* OUT */);


/*
 * GSUB/GPOS feature query and enumeration interface
 */

#define HB_OT_LAYOUT_NO_SCRIPT_INDEX		((unsigned int) 0xFFFF)
#define HB_OT_LAYOUT_NO_FEATURE_INDEX		((unsigned int) 0xFFFF)
#define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX	((unsigned int) 0xFFFF)
#define HB_OT_LAYOUT_TAG_DEFAULT_SCRIPT		HB_TAG ('D', 'F', 'L', 'T')
#define HB_OT_LAYOUT_TAG_DEFAULT_LANGUAGE	HB_TAG ('d', 'f', 'l', 't')

hb_bool_t
hb_ot_layout_table_get_script_tags (hb_face_t    *face,
				    hb_tag_t      table_tag,
				    unsigned int *script_count /* IN/OUT */,
				    hb_tag_t     *script_tags /* OUT */);

hb_bool_t
hb_ot_layout_table_find_script (hb_face_t    *face,
				hb_tag_t      table_tag,
				hb_tag_t      script_tag,
				unsigned int *script_index);

hb_bool_t
hb_ot_layout_table_get_feature_tags (hb_face_t    *face,
				     hb_tag_t      table_tag,
				     unsigned int *feature_count /* IN/OUT */,
				     hb_tag_t     *feature_tags /* OUT */);

hb_bool_t
hb_ot_layout_script_get_language_tags (hb_face_t    *face,
				       hb_tag_t      table_tag,
				       unsigned int  script_index,
				       unsigned int *language_count /* IN/OUT */,
				       hb_tag_t     *language_tags /* OUT */);

hb_bool_t
hb_ot_layout_script_find_language (hb_face_t    *face,
				   hb_tag_t      table_tag,
				   unsigned int  script_index,
				   hb_tag_t      language_tag,
				   unsigned int *language_index);

hb_bool_t
hb_ot_layout_language_get_required_feature_index (hb_face_t    *face,
						  hb_tag_t      table_tag,
						  unsigned int  script_index,
						  unsigned int  language_index,
						  unsigned int *feature_index);

hb_bool_t
hb_ot_layout_language_get_feature_indexes (hb_face_t    *face,
					   hb_tag_t      table_tag,
					   unsigned int  script_index,
					   unsigned int  language_index,
					   unsigned int *feature_count /* IN/OUT */,
					   unsigned int *feature_indexes /* OUT */);

hb_bool_t
hb_ot_layout_language_get_feature_tags (hb_face_t    *face,
					hb_tag_t      table_tag,
					unsigned int  script_index,
					unsigned int  language_index,
					unsigned int *feature_count /* IN/OUT */,
					hb_tag_t     *feature_tags /* OUT */);

hb_bool_t
hb_ot_layout_language_find_feature (hb_face_t    *face,
				    hb_tag_t      table_tag,
				    unsigned int  script_index,
				    unsigned int  language_index,
				    hb_tag_t      feature_tag,
				    unsigned int *feature_index);

hb_bool_t
hb_ot_layout_feature_get_lookup_indexes (hb_face_t    *face,
					 hb_tag_t      table_tag,
					 unsigned int  feature_index,
					 unsigned int *lookup_count /* IN/OUT */,
					 unsigned int *lookup_indexes /* OUT */);


/*
 * GSUB
 */

hb_bool_t
hb_ot_layout_has_substitution (hb_face_t *face);

hb_bool_t
hb_ot_layout_substitute_lookup (hb_face_t    *face,
				hb_buffer_t  *buffer,
				unsigned int  lookup_index,
				hb_mask_t     mask);

/*
 * GPOS
 */

hb_bool_t
hb_ot_layout_has_positioning (hb_face_t *face);

hb_bool_t
hb_ot_layout_position_lookup   (hb_face_t    *face,
				hb_font_t    *font,
				hb_buffer_t  *buffer,
				unsigned int  lookup_index,
				hb_mask_t     mask);


HB_END_DECLS

#endif /* HB_OT_LAYOUT_H */

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