diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-buffer.h')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-buffer.h | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-buffer.h b/src/3rdparty/harfbuzz-ng/src/hb-buffer.h new file mode 100644 index 0000000000..87c4ce58e8 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/hb-buffer.h @@ -0,0 +1,323 @@ +/* + * 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 + + +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; + +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; + + +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_bool_t +hb_segment_properties_equal (const hb_segment_properties_t *a, + const hb_segment_properties_t *b); + +unsigned int +hb_segment_properties_hash (const hb_segment_properties_t *p); + + + +/* + * hb_buffer_t + */ + +typedef struct hb_buffer_t hb_buffer_t; + +hb_buffer_t * +hb_buffer_create (void); + +hb_buffer_t * +hb_buffer_get_empty (void); + +hb_buffer_t * +hb_buffer_reference (hb_buffer_t *buffer); + +void +hb_buffer_destroy (hb_buffer_t *buffer); + +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); + +void * +hb_buffer_get_user_data (hb_buffer_t *buffer, + hb_user_data_key_t *key); + + +typedef enum { + HB_BUFFER_CONTENT_TYPE_INVALID = 0, + HB_BUFFER_CONTENT_TYPE_UNICODE, + HB_BUFFER_CONTENT_TYPE_GLYPHS +} hb_buffer_content_type_t; + +void +hb_buffer_set_content_type (hb_buffer_t *buffer, + hb_buffer_content_type_t content_type); + +hb_buffer_content_type_t +hb_buffer_get_content_type (hb_buffer_t *buffer); + + +void +hb_buffer_set_unicode_funcs (hb_buffer_t *buffer, + hb_unicode_funcs_t *unicode_funcs); + +hb_unicode_funcs_t * +hb_buffer_get_unicode_funcs (hb_buffer_t *buffer); + +void +hb_buffer_set_direction (hb_buffer_t *buffer, + hb_direction_t direction); + +hb_direction_t +hb_buffer_get_direction (hb_buffer_t *buffer); + +void +hb_buffer_set_script (hb_buffer_t *buffer, + hb_script_t script); + +hb_script_t +hb_buffer_get_script (hb_buffer_t *buffer); + +void +hb_buffer_set_language (hb_buffer_t *buffer, + hb_language_t language); + + +hb_language_t +hb_buffer_get_language (hb_buffer_t *buffer); + +void +hb_buffer_set_segment_properties (hb_buffer_t *buffer, + const hb_segment_properties_t *props); + +void +hb_buffer_get_segment_properties (hb_buffer_t *buffer, + hb_segment_properties_t *props); + +void +hb_buffer_guess_segment_properties (hb_buffer_t *buffer); + + +typedef enum { /*< flags >*/ + HB_BUFFER_FLAG_DEFAULT = 0x00000000, + HB_BUFFER_FLAG_BOT = 0x00000001, /* Beginning-of-text */ + HB_BUFFER_FLAG_EOT = 0x00000002, /* End-of-text */ + HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES = 0x00000004 +} hb_buffer_flags_t; + +void +hb_buffer_set_flags (hb_buffer_t *buffer, + hb_buffer_flags_t flags); + +hb_buffer_flags_t +hb_buffer_get_flags (hb_buffer_t *buffer); + + +/* Resets the buffer. Afterwards it's as if it was just created, + * except that it has a larger buffer allocated perhaps... */ +void +hb_buffer_reset (hb_buffer_t *buffer); + +/* Like reset, but does NOT clear unicode_funcs. */ +void +hb_buffer_clear_contents (hb_buffer_t *buffer); + +/* Returns false if allocation failed */ +hb_bool_t +hb_buffer_pre_allocate (hb_buffer_t *buffer, + unsigned int size); + + +/* Returns false if allocation has failed before */ +hb_bool_t +hb_buffer_allocation_successful (hb_buffer_t *buffer); + +void +hb_buffer_reverse (hb_buffer_t *buffer); + +void +hb_buffer_reverse_clusters (hb_buffer_t *buffer); + + +/* Filling the buffer in */ + +void +hb_buffer_add (hb_buffer_t *buffer, + hb_codepoint_t codepoint, + unsigned int cluster); + +void +hb_buffer_add_utf8 (hb_buffer_t *buffer, + const char *text, + int text_length, + unsigned int item_offset, + int item_length); + +void +hb_buffer_add_utf16 (hb_buffer_t *buffer, + const uint16_t *text, + int text_length, + unsigned int item_offset, + int item_length); + +void +hb_buffer_add_utf32 (hb_buffer_t *buffer, + const uint32_t *text, + int text_length, + unsigned int item_offset, + int item_length); + + +/* Clears any new items added at the end */ +hb_bool_t +hb_buffer_set_length (hb_buffer_t *buffer, + unsigned int length); + +/* Return value valid as long as buffer not modified */ +unsigned int +hb_buffer_get_length (hb_buffer_t *buffer); + +/* Getting glyphs out of the buffer */ + +/* Return value valid as long as buffer not modified */ +hb_glyph_info_t * +hb_buffer_get_glyph_infos (hb_buffer_t *buffer, + unsigned int *length); + +/* Return value valid as long as buffer not modified */ +hb_glyph_position_t * +hb_buffer_get_glyph_positions (hb_buffer_t *buffer, + unsigned int *length); + + +/* Reorders a glyph buffer to have canonical in-cluster glyph order / position. + * The resulting clusters should behave identical to pre-reordering clusters. + * NOTE: This has nothing to do with Unicode normalization. */ +void +hb_buffer_normalize_glyphs (hb_buffer_t *buffer); + + +/* + * Serialize + */ + +typedef enum { /*< flags >*/ + HB_BUFFER_SERIALIZE_FLAG_DEFAULT = 0x00000000, + HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS = 0x00000001, + HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS = 0x00000002, + HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES = 0x00000004 +} hb_buffer_serialize_flags_t; + +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; + +/* len=-1 means str is NUL-terminated. */ +hb_buffer_serialize_format_t +hb_buffer_serialize_format_from_string (const char *str, int len); + +const char * +hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format); + +const char ** +hb_buffer_serialize_list_formats (void); + +/* Returns number of items, starting at start, that were serialized. */ +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, /* May be NULL */ + hb_font_t *font, /* May be NULL */ + hb_buffer_serialize_format_t format, + hb_buffer_serialize_flags_t flags); + +hb_bool_t +hb_buffer_deserialize_glyphs (hb_buffer_t *buffer, + const char *buf, + int buf_len, /* -1 means nul-terminated */ + const char **end_ptr, /* May be NULL */ + hb_font_t *font, /* May be NULL */ + hb_buffer_serialize_format_t format); + + +HB_END_DECLS + +#endif /* HB_BUFFER_H */ |