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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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+/*
+ * Copyright © 1998-2004 David Turner and Werner Lemberg
+ * Copyright © 2004,2007,2009 Red Hat, Inc.
+ * Copyright © 2011,2012 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping 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): Owen Taylor, Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_H_IN
+#error "Include <hb.h> instead."
+#endif
+
+#ifndef HB_BUFFER_H
+#define HB_BUFFER_H
+
+#include "hb-common.h"
+#include "hb-unicode.h"
+#include "hb-font.h"
+
+HB_BEGIN_DECLS
+
+/**
+ * hb_glyph_info_t:
+ * @codepoint: either a Unicode code point (before shaping) or a glyph index
+ * (after shaping).
+ * @mask:
+ * @cluster: the index of the character in the original text that corresponds
+ * to this #hb_glyph_info_t, or whatever the client passes to
+ * hb_buffer_add(). More than one #hb_glyph_info_t can have the same
+ * @cluster value, if they resulted from the same character (e.g. one
+ * to many glyph substitution), and when more than one character gets
+ * merged in the same glyph (e.g. many to one glyph substitution) the
+ * #hb_glyph_info_t will have the smallest cluster value of them.
+ * By default some characters are merged into the same cluster
+ * (e.g. combining marks have the same cluster as their bases)
+ * even if they are separate glyphs, hb_buffer_set_cluster_level()
+ * allow selecting more fine-grained cluster handling.
+ *
+ * The #hb_glyph_info_t is the structure that holds information about the
+ * glyphs and their relation to input text.
+ *
+ */
+typedef struct hb_glyph_info_t {
+ hb_codepoint_t codepoint;
+ hb_mask_t mask;
+ uint32_t cluster;
+
+ /*< private >*/
+ hb_var_int_t var1;
+ hb_var_int_t var2;
+} hb_glyph_info_t;
+
+/**
+ * hb_glyph_position_t:
+ * @x_advance: how much the line advances after drawing this glyph when setting
+ * text in horizontal direction.
+ * @y_advance: how much the line advances after drawing this glyph when setting
+ * text in vertical direction.
+ * @x_offset: how much the glyph moves on the X-axis before drawing it, this
+ * should not affect how much the line advances.
+ * @y_offset: how much the glyph moves on the Y-axis before drawing it, this
+ * should not affect how much the line advances.
+ *
+ * The #hb_glyph_position_t is the structure that holds the positions of the
+ * glyph in both horizontal and vertical directions. All positions in
+ * #hb_glyph_position_t are relative to the current point.
+ *
+ */
+typedef struct hb_glyph_position_t {
+ hb_position_t x_advance;
+ hb_position_t y_advance;
+ hb_position_t x_offset;
+ hb_position_t y_offset;
+
+ /*< private >*/
+ hb_var_int_t var;
+} hb_glyph_position_t;
+
+/**
+ * hb_segment_properties_t:
+ * @direction: the #hb_direction_t of the buffer, see hb_buffer_set_direction().
+ * @script: the #hb_script_t of the buffer, see hb_buffer_set_script().
+ * @language: the #hb_language_t of the buffer, see hb_buffer_set_language().
+ *
+ * The structure that holds various text properties of an #hb_buffer_t. Can be
+ * set and retrieved using hb_buffer_set_segment_properties() and
+ * hb_buffer_get_segment_properties(), respectively.
+ */
+typedef struct hb_segment_properties_t {
+ hb_direction_t direction;
+ hb_script_t script;
+ hb_language_t language;
+ /*< private >*/
+ void *reserved1;
+ void *reserved2;
+} hb_segment_properties_t;
+
+#define HB_SEGMENT_PROPERTIES_DEFAULT {HB_DIRECTION_INVALID, \
+ HB_SCRIPT_INVALID, \
+ HB_LANGUAGE_INVALID, \
+ NULL, \
+ NULL}
+
+HB_EXTERN hb_bool_t
+hb_segment_properties_equal (const hb_segment_properties_t *a,
+ const hb_segment_properties_t *b);
+
+HB_EXTERN unsigned int
+hb_segment_properties_hash (const hb_segment_properties_t *p);
+
+
+
+/**
+ * hb_buffer_t:
+ *
+ * The main structure holding the input text and its properties before shaping,
+ * and output glyphs and their information after shaping.
+ */
+
+typedef struct hb_buffer_t hb_buffer_t;
+
+HB_EXTERN hb_buffer_t *
+hb_buffer_create (void);
+
+HB_EXTERN hb_buffer_t *
+hb_buffer_get_empty (void);
+
+HB_EXTERN hb_buffer_t *
+hb_buffer_reference (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_destroy (hb_buffer_t *buffer);
+
+HB_EXTERN hb_bool_t
+hb_buffer_set_user_data (hb_buffer_t *buffer,
+ hb_user_data_key_t *key,
+ void * data,
+ hb_destroy_func_t destroy,
+ hb_bool_t replace);
+
+HB_EXTERN void *
+hb_buffer_get_user_data (hb_buffer_t *buffer,
+ hb_user_data_key_t *key);
+
+/**
+ * hb_buffer_content_type_t:
+ * @HB_BUFFER_CONTENT_TYPE_INVALID: Initial value for new buffer.
+ * @HB_BUFFER_CONTENT_TYPE_UNICODE: The buffer contains input characters (before shaping).
+ * @HB_BUFFER_CONTENT_TYPE_GLYPHS: The buffer contains output glyphs (after shaping).
+ */
+typedef enum {
+ HB_BUFFER_CONTENT_TYPE_INVALID = 0,
+ HB_BUFFER_CONTENT_TYPE_UNICODE,
+ HB_BUFFER_CONTENT_TYPE_GLYPHS
+} hb_buffer_content_type_t;
+
+HB_EXTERN void
+hb_buffer_set_content_type (hb_buffer_t *buffer,
+ hb_buffer_content_type_t content_type);
+
+HB_EXTERN hb_buffer_content_type_t
+hb_buffer_get_content_type (hb_buffer_t *buffer);
+
+
+HB_EXTERN void
+hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
+ hb_unicode_funcs_t *unicode_funcs);
+
+HB_EXTERN hb_unicode_funcs_t *
+hb_buffer_get_unicode_funcs (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_set_direction (hb_buffer_t *buffer,
+ hb_direction_t direction);
+
+HB_EXTERN hb_direction_t
+hb_buffer_get_direction (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_set_script (hb_buffer_t *buffer,
+ hb_script_t script);
+
+HB_EXTERN hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_set_language (hb_buffer_t *buffer,
+ hb_language_t language);
+
+
+HB_EXTERN hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_set_segment_properties (hb_buffer_t *buffer,
+ const hb_segment_properties_t *props);
+
+HB_EXTERN void
+hb_buffer_get_segment_properties (hb_buffer_t *buffer,
+ hb_segment_properties_t *props);
+
+HB_EXTERN void
+hb_buffer_guess_segment_properties (hb_buffer_t *buffer);
+
+
+/**
+ * hb_buffer_flags_t:
+ * @HB_BUFFER_FLAG_DEFAULT: the default buffer flag.
+ * @HB_BUFFER_FLAG_BOT: flag indicating that special handling of the beginning
+ * of text paragraph can be applied to this buffer. Should usually
+ * be set, unless you are passing to the buffer only part
+ * of the text without the full context.
+ * @HB_BUFFER_FLAG_EOT: flag indicating that special handling of the end of text
+ * paragraph can be applied to this buffer, similar to
+ * @HB_BUFFER_FLAG_EOT.
+ * @HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES:
+ * flag indication that character with Default_Ignorable
+ * Unicode property should use the corresponding glyph
+ * from the font, instead of hiding them (currently done
+ * by replacing them with the space glyph and zeroing the
+ * advance width.)
+ *
+ * Since: 0.9.20
+ */
+typedef enum { /*< flags >*/
+ HB_BUFFER_FLAG_DEFAULT = 0x00000000u,
+ HB_BUFFER_FLAG_BOT = 0x00000001u, /* Beginning-of-text */
+ HB_BUFFER_FLAG_EOT = 0x00000002u, /* End-of-text */
+ HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES = 0x00000004u
+} hb_buffer_flags_t;
+
+HB_EXTERN void
+hb_buffer_set_flags (hb_buffer_t *buffer,
+ hb_buffer_flags_t flags);
+
+HB_EXTERN hb_buffer_flags_t
+hb_buffer_get_flags (hb_buffer_t *buffer);
+
+/*
+ * Since: 0.9.42
+ */
+typedef enum {
+ HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES = 0,
+ HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS = 1,
+ HB_BUFFER_CLUSTER_LEVEL_CHARACTERS = 2,
+ HB_BUFFER_CLUSTER_LEVEL_DEFAULT = HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES
+} hb_buffer_cluster_level_t;
+
+HB_EXTERN void
+hb_buffer_set_cluster_level (hb_buffer_t *buffer,
+ hb_buffer_cluster_level_t cluster_level);
+
+HB_EXTERN hb_buffer_cluster_level_t
+hb_buffer_get_cluster_level (hb_buffer_t *buffer);
+
+/**
+ * HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT:
+ *
+ * The default code point for replacing invalid characters in a given encoding.
+ * Set to U+FFFD REPLACEMENT CHARACTER.
+ *
+ * Since: 0.9.31
+ */
+#define HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT 0xFFFDu
+
+HB_EXTERN void
+hb_buffer_set_replacement_codepoint (hb_buffer_t *buffer,
+ hb_codepoint_t replacement);
+
+HB_EXTERN hb_codepoint_t
+hb_buffer_get_replacement_codepoint (hb_buffer_t *buffer);
+
+
+HB_EXTERN void
+hb_buffer_reset (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_clear_contents (hb_buffer_t *buffer);
+
+HB_EXTERN hb_bool_t
+hb_buffer_pre_allocate (hb_buffer_t *buffer,
+ unsigned int size);
+
+
+HB_EXTERN hb_bool_t
+hb_buffer_allocation_successful (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_reverse (hb_buffer_t *buffer);
+
+HB_EXTERN void
+hb_buffer_reverse_range (hb_buffer_t *buffer,
+ unsigned int start, unsigned int end);
+
+HB_EXTERN void
+hb_buffer_reverse_clusters (hb_buffer_t *buffer);
+
+
+/* Filling the buffer in */
+
+HB_EXTERN void
+hb_buffer_add (hb_buffer_t *buffer,
+ hb_codepoint_t codepoint,
+ unsigned int cluster);
+
+HB_EXTERN void
+hb_buffer_add_utf8 (hb_buffer_t *buffer,
+ const char *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length);
+
+HB_EXTERN void
+hb_buffer_add_utf16 (hb_buffer_t *buffer,
+ const uint16_t *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length);
+
+HB_EXTERN void
+hb_buffer_add_utf32 (hb_buffer_t *buffer,
+ const uint32_t *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length);
+
+HB_EXTERN void
+hb_buffer_add_latin1 (hb_buffer_t *buffer,
+ const uint8_t *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length);
+
+HB_EXTERN void
+hb_buffer_add_codepoints (hb_buffer_t *buffer,
+ const hb_codepoint_t *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length);
+
+
+HB_EXTERN hb_bool_t
+hb_buffer_set_length (hb_buffer_t *buffer,
+ unsigned int length);
+
+HB_EXTERN unsigned int
+hb_buffer_get_length (hb_buffer_t *buffer);
+
+/* Getting glyphs out of the buffer */
+
+HB_EXTERN hb_glyph_info_t *
+hb_buffer_get_glyph_infos (hb_buffer_t *buffer,
+ unsigned int *length);
+
+HB_EXTERN hb_glyph_position_t *
+hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
+ unsigned int *length);
+
+
+HB_EXTERN void
+hb_buffer_normalize_glyphs (hb_buffer_t *buffer);
+
+
+/*
+ * Serialize
+ */
+
+/**
+ * hb_buffer_serialize_flags_t:
+ * @HB_BUFFER_SERIALIZE_FLAG_DEFAULT: serialize glyph names, clusters and positions.
+ * @HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS: do not serialize glyph cluster.
+ * @HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS: do not serialize glyph position information.
+ * @HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES: do no serialize glyph name.
+ * @HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS: serialize glyph extents.
+ *
+ * Flags that control what glyph information are serialized in hb_buffer_serialize_glyphs().
+ *
+ * Since: 0.9.20
+ */
+typedef enum { /*< flags >*/
+ HB_BUFFER_SERIALIZE_FLAG_DEFAULT = 0x00000000u,
+ HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS = 0x00000001u,
+ HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS = 0x00000002u,
+ HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES = 0x00000004u,
+ HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS = 0x00000008u
+} hb_buffer_serialize_flags_t;
+
+/**
+ * hb_buffer_serialize_format_t:
+ * @HB_BUFFER_SERIALIZE_FORMAT_TEXT: a human-readable, plain text format.
+ * @HB_BUFFER_SERIALIZE_FORMAT_JSON: a machine-readable JSON format.
+ * @HB_BUFFER_SERIALIZE_FORMAT_INVALID: invalid format.
+ *
+ * The buffer serialization and de-serialization format used in
+ * hb_buffer_serialize_glyphs() and hb_buffer_deserialize_glyphs().
+ *
+ * Since: 0.9.2
+ */
+typedef enum {
+ HB_BUFFER_SERIALIZE_FORMAT_TEXT = HB_TAG('T','E','X','T'),
+ HB_BUFFER_SERIALIZE_FORMAT_JSON = HB_TAG('J','S','O','N'),
+ HB_BUFFER_SERIALIZE_FORMAT_INVALID = HB_TAG_NONE
+} hb_buffer_serialize_format_t;
+
+HB_EXTERN hb_buffer_serialize_format_t
+hb_buffer_serialize_format_from_string (const char *str, int len);
+
+HB_EXTERN const char *
+hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format);
+
+HB_EXTERN const char **
+hb_buffer_serialize_list_formats (void);
+
+HB_EXTERN unsigned int
+hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
+ unsigned int start,
+ unsigned int end,
+ char *buf,
+ unsigned int buf_size,
+ unsigned int *buf_consumed,
+ hb_font_t *font,
+ hb_buffer_serialize_format_t format,
+ hb_buffer_serialize_flags_t flags);
+
+HB_EXTERN hb_bool_t
+hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
+ const char *buf,
+ int buf_len,
+ const char **end_ptr,
+ hb_font_t *font,
+ hb_buffer_serialize_format_t format);
+
+
+/*
+ * Debugging.
+ */
+
+typedef hb_bool_t (*hb_buffer_message_func_t) (hb_buffer_t *buffer,
+ hb_font_t *font,
+ const char *message,
+ void *user_data);
+
+HB_EXTERN void
+hb_buffer_set_message_func (hb_buffer_t *buffer,
+ hb_buffer_message_func_t func,
+ void *user_data, hb_destroy_func_t destroy);
+
+
+HB_END_DECLS
+
+#endif /* HB_BUFFER_H */