[docs] Some documentation on buffers
Some of it (create, reference, destroy) are adapted from Cairo docs.
This commit is contained in:
Khaled Hosny
parent
d7bf9d05c5
commit
f18d2226b6
@ -25,42 +25,19 @@ hb_memory_mode_t
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<SECTION>
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<FILE>hb-buffer</FILE>
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HB_SEGMENT_PROPERTIES_DEFAULT
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hb_buffer_add
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hb_buffer_add_utf16
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hb_buffer_add_utf32
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hb_buffer_add_utf8
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hb_buffer_allocation_successful
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hb_buffer_clear_contents
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hb_buffer_content_type_t
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hb_buffer_create
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hb_buffer_deserialize_glyphs
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hb_buffer_destroy
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hb_buffer_flags_t
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hb_buffer_get_content_type
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hb_buffer_get_direction
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hb_buffer_get_empty
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hb_buffer_get_flags
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hb_buffer_get_glyph_infos
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hb_buffer_get_glyph_positions
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hb_buffer_get_language
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hb_buffer_get_length
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hb_buffer_get_script
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hb_buffer_get_segment_properties
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hb_buffer_get_unicode_funcs
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hb_buffer_get_user_data
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hb_buffer_guess_segment_properties
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hb_buffer_normalize_glyphs
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hb_buffer_pre_allocate
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hb_buffer_reference
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hb_buffer_get_empty
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hb_buffer_destroy
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hb_buffer_reset
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hb_buffer_reverse
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hb_buffer_reverse_clusters
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hb_buffer_serialize_flags_t
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hb_buffer_serialize_format_from_string
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hb_buffer_serialize_format_t
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hb_buffer_serialize_format_to_string
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hb_buffer_serialize_glyphs
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hb_buffer_serialize_list_formats
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hb_buffer_clear_contents
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hb_buffer_pre_allocate
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hb_buffer_allocation_successful
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hb_buffer_add
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hb_buffer_add_codepoints
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hb_buffer_add_utf32
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hb_buffer_add_utf16
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hb_buffer_add_utf8
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hb_buffer_set_content_type
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hb_buffer_set_direction
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hb_buffer_set_flags
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@ -70,12 +47,36 @@ hb_buffer_set_script
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hb_buffer_set_segment_properties
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hb_buffer_set_unicode_funcs
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hb_buffer_set_user_data
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hb_buffer_guess_segment_properties
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hb_buffer_get_content_type
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hb_buffer_get_direction
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hb_buffer_get_flags
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hb_buffer_get_glyph_infos
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hb_buffer_get_glyph_positions
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hb_buffer_get_language
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hb_buffer_get_length
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hb_buffer_get_script
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hb_buffer_get_segment_properties
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hb_buffer_get_unicode_funcs
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hb_buffer_get_user_data
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hb_buffer_normalize_glyphs
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hb_buffer_reverse
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hb_buffer_reverse_clusters
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hb_buffer_serialize_glyphs
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hb_buffer_deserialize_glyphs
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hb_buffer_serialize_format_from_string
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hb_buffer_serialize_format_to_string
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hb_buffer_serialize_list_formats
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hb_segment_properties_equal
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hb_segment_properties_hash
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hb_buffer_t
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hb_glyph_info_t
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hb_glyph_position_t
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hb_segment_properties_equal
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hb_segment_properties_hash
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hb_buffer_content_type_t
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hb_buffer_flags_t
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hb_buffer_serialize_flags_t
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hb_segment_properties_t
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hb_buffer_serialize_format_t
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</SECTION>
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<SECTION>
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172
src/hb-buffer.cc
172
src/hb-buffer.cc
@ -35,6 +35,15 @@
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#define HB_DEBUG_BUFFER (HB_DEBUG+0)
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#endif
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/**
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* SECTION: hb-buffer
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* @title: Buffers
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* @short_description: Input and output buffers
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* @include: hb.h
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*
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* Buffers serve dual role in HarfBuzz; they hold the input characters that are
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* passed hb_shape(), and after shaping they hold the output glyphs.
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**/
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/**
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* hb_segment_properties_equal:
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@ -710,9 +719,14 @@ void hb_buffer_t::deallocate_var_all (void)
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/**
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* hb_buffer_create: (Xconstructor)
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*
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*
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* Creates a new #hb_buffer_t with all properties to defaults.
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*
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* Return value: (transfer full)
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* Return value: (transfer full):
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* A newly allocated #hb_buffer_t with a reference count of 1. The initial
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* reference count should be released with hb_buffe_destroy() when you are done
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* using the #hb_buffer_t. This function never returns %NULL. If memory cannot
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* be allocated, a special #hb_buffer_t object will be returned on which
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* hb_buffer_allocation_successful() returns %false.
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*
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* Since: 0.9.2
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**/
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@ -767,11 +781,13 @@ hb_buffer_get_empty (void)
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/**
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* hb_buffer_reference: (skip)
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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* Increases the reference count on @buffer by one. This prevents @buffer from
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* being destroyed until a matching call to hb_buffer_destroy() is made.
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*
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* Return value: (transfer full):
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* the referenced #hb_buffer_t.
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*
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* Since: 0.9.2
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**/
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@ -783,9 +799,11 @@ hb_buffer_reference (hb_buffer_t *buffer)
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/**
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* hb_buffer_destroy: (skip)
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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* Deallocate the @buffer.
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* Decreases the reference count on @buffer by one. If the result is zero, then
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* @buffer and all associated resources are freed. See hb_buffer_reference().
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*
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* Since: 0.9.2
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**/
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@ -806,7 +824,7 @@ hb_buffer_destroy (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_user_data: (skip)
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @key:
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* @data:
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* @destroy:
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@ -830,7 +848,7 @@ hb_buffer_set_user_data (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_user_data: (skip)
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @key:
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*
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*
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@ -849,7 +867,7 @@ hb_buffer_get_user_data (hb_buffer_t *buffer,
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/**
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* hb_buffer_set_content_type:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @content_type:
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*
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*
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@ -865,7 +883,7 @@ hb_buffer_set_content_type (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_content_type:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -882,7 +900,7 @@ hb_buffer_get_content_type (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_unicode_funcs:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @unicode_funcs:
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*
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*
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@ -907,7 +925,7 @@ hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_unicode_funcs:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -923,7 +941,7 @@ hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_direction:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @direction:
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*
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*
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@ -943,7 +961,7 @@ hb_buffer_set_direction (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_direction:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -959,7 +977,7 @@ hb_buffer_get_direction (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_script:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @script:
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*
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*
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@ -978,7 +996,7 @@ hb_buffer_set_script (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_script:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -994,7 +1012,7 @@ hb_buffer_get_script (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_language:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @language:
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*
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*
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@ -1013,7 +1031,7 @@ hb_buffer_set_language (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_language:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -1029,7 +1047,7 @@ hb_buffer_get_language (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_segment_properties:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @props:
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*
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*
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@ -1048,7 +1066,7 @@ hb_buffer_set_segment_properties (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_segment_properties:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @props: (out):
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*
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*
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@ -1065,7 +1083,7 @@ hb_buffer_get_segment_properties (hb_buffer_t *buffer,
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/**
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* hb_buffer_set_flags:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @flags:
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*
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*
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@ -1084,7 +1102,7 @@ hb_buffer_set_flags (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_flags:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -1100,7 +1118,7 @@ hb_buffer_get_flags (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_cluster_level:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @cluster_level:
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*
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*
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@ -1119,7 +1137,7 @@ hb_buffer_set_cluster_level (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_cluster_level:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -1136,7 +1154,7 @@ hb_buffer_get_cluster_level (hb_buffer_t *buffer)
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/**
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* hb_buffer_set_replacement_codepoint:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @replacement:
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*
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*
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@ -1155,7 +1173,7 @@ hb_buffer_set_replacement_codepoint (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_replacement_codepoint:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -1172,7 +1190,7 @@ hb_buffer_get_replacement_codepoint (hb_buffer_t *buffer)
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/**
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* hb_buffer_reset:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -1186,7 +1204,7 @@ hb_buffer_reset (hb_buffer_t *buffer)
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/**
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* hb_buffer_clear_contents:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -1200,7 +1218,7 @@ hb_buffer_clear_contents (hb_buffer_t *buffer)
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/**
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* hb_buffer_pre_allocate:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @size:
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*
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*
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@ -1217,7 +1235,7 @@ hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size)
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/**
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* hb_buffer_allocation_successful:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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*
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*
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@ -1233,11 +1251,15 @@ hb_buffer_allocation_successful (hb_buffer_t *buffer)
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/**
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* hb_buffer_add:
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* @buffer: a buffer.
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* @codepoint:
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* @cluster:
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* @buffer: an #hb_buffer_t.
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* @codepoint: a Unicode code point.
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* @cluster: the cluster value of @codepoint.
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*
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*
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* Appends a character with the Unicode value of @codepoint to @buffer, and
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* gives it the initial cluster value of @cluster. Clusters can be any thing
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* the client wants, they are usually used to refer to the index of the
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* character in the input text stream and are output in
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* #hb_glyph_info_t.cluster field.
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*
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* Since: 0.9.7
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**/
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@ -1252,7 +1274,7 @@ hb_buffer_add (hb_buffer_t *buffer,
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/**
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* hb_buffer_set_length:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @length:
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*
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*
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@ -1292,7 +1314,7 @@ hb_buffer_set_length (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_length:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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* Returns the number of items in the buffer.
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*
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@ -1308,7 +1330,7 @@ hb_buffer_get_length (hb_buffer_t *buffer)
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/**
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* hb_buffer_get_glyph_infos:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @length: (out): output array length.
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*
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* Returns buffer glyph information array. Returned pointer
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@ -1330,7 +1352,7 @@ hb_buffer_get_glyph_infos (hb_buffer_t *buffer,
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/**
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* hb_buffer_get_glyph_positions:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @length: (out): output length.
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*
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* Returns buffer glyph position array. Returned pointer
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@ -1355,7 +1377,7 @@ hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
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/**
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* hb_buffer_reverse:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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* Reverses buffer contents.
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*
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@ -1369,7 +1391,7 @@ hb_buffer_reverse (hb_buffer_t *buffer)
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/**
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* hb_buffer_reverse_range:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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* @start: start index.
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* @end: end index.
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*
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@ -1386,7 +1408,7 @@ hb_buffer_reverse_range (hb_buffer_t *buffer,
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/**
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* hb_buffer_reverse_clusters:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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* Reverses buffer clusters. That is, the buffer contents are
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* reversed, then each cluster (consecutive items having the
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@ -1402,7 +1424,7 @@ hb_buffer_reverse_clusters (hb_buffer_t *buffer)
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/**
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* hb_buffer_guess_segment_properties:
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* @buffer: a buffer.
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* @buffer: an #hb_buffer_t.
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*
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* Sets unset buffer segment properties based on buffer Unicode
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* contents. If buffer is not empty, it must have content type
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@ -1501,13 +1523,14 @@ hb_buffer_add_utf (hb_buffer_t *buffer,
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/**
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* hb_buffer_add_utf8:
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* @buffer: a buffer.
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* @text: (array length=text_length) (element-type uint8_t):
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* @text_length:
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* @item_offset:
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* @item_length:
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* @buffer: an #hb_buffer_t.
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* @text: (array length=text_length): an array of UTF-8 characters to append.
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* @text_length: the length of the @text, or -1 if it is %NULL terminated.
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* @item_offset: the offset of the first character to add to the @buffer.
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* @item_length: the number of characters to add to the @buffer, or -1 for the
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* end of @text (assuming it is %NULL terminated).
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*
|
||||
*
|
||||
* See hb_buffer_add_codepoints().
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
@ -1523,13 +1546,14 @@ hb_buffer_add_utf8 (hb_buffer_t *buffer,
|
||||
|
||||
/**
|
||||
* hb_buffer_add_utf16:
|
||||
* @buffer: a buffer.
|
||||
* @text: (array length=text_length):
|
||||
* @text_length:
|
||||
* @item_offset:
|
||||
* @item_length:
|
||||
* @buffer: an #hb_buffer_t.
|
||||
* @text: (array length=text_length): an array of UTF-16 characters to append.
|
||||
* @text_length: the length of the @text, or -1 if it is %NULL terminated.
|
||||
* @item_offset: the offset of the first character to add to the @buffer.
|
||||
* @item_length: the number of characters to add to the @buffer, or -1 for the
|
||||
* end of @text (assuming it is %NULL terminated).
|
||||
*
|
||||
*
|
||||
* See hb_buffer_add_codepoints().
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
@ -1545,13 +1569,14 @@ hb_buffer_add_utf16 (hb_buffer_t *buffer,
|
||||
|
||||
/**
|
||||
* hb_buffer_add_utf32:
|
||||
* @buffer: a buffer.
|
||||
* @text: (array length=text_length):
|
||||
* @text_length:
|
||||
* @item_offset:
|
||||
* @item_length:
|
||||
* @buffer: an #hb_buffer_t.
|
||||
* @text: (array length=text_length): an array of UTF-32 characters to append.
|
||||
* @text_length: the length of the @text, or -1 if it is %NULL terminated.
|
||||
* @item_offset: the offset of the first character to add to the @buffer.
|
||||
* @item_length: the number of characters to add to the @buffer, or -1 for the
|
||||
* end of @text (assuming it is %NULL terminated).
|
||||
*
|
||||
*
|
||||
* See hb_buffer_add_codepoints().
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
@ -1567,7 +1592,7 @@ hb_buffer_add_utf32 (hb_buffer_t *buffer,
|
||||
|
||||
/**
|
||||
* hb_buffer_add_latin1:
|
||||
* @buffer: a buffer.
|
||||
* @buffer: an #hb_buffer_t.
|
||||
* @text: (array length=text_length) (element-type uint8_t):
|
||||
* @text_length:
|
||||
* @item_offset:
|
||||
@ -1589,13 +1614,22 @@ hb_buffer_add_latin1 (hb_buffer_t *buffer,
|
||||
|
||||
/**
|
||||
* hb_buffer_add_codepoints:
|
||||
* @buffer: a buffer.
|
||||
* @text: (array length=text_length):
|
||||
* @text_length:
|
||||
* @item_offset:
|
||||
* @item_length:
|
||||
* @buffer: a #hb_buffer_t to append characters to.
|
||||
* @text: (array length=text_length): an array of Unicode code points to append.
|
||||
* @text_length: the length of the @text, or -1 if it is %NULL terminated.
|
||||
* @item_offset: the offset of the first code point to add to the @buffer.
|
||||
* @item_length: the number of code points to add to the @buffer, or -1 for the
|
||||
* end of @text (assuming it is %NULL terminated).
|
||||
*
|
||||
*
|
||||
* Appends characters from @text array to @buffer. The @item_offset is the
|
||||
* position of the first character from @text that will be appended, and
|
||||
* @item_length is the number of character. When shaping part of a larger text
|
||||
* (e.g. a run of text from a paragraph), instead of passing just the substring
|
||||
* corresponding to the run, it is preferable to pass the whole
|
||||
* paragraph and specify the run start and length as @item_offset and
|
||||
* @item_length, respectively, to give HarfBuzz the full context to be able,
|
||||
* for example, to do cross-run Arabic shaping or properly handle combining
|
||||
* marks at stat of run.
|
||||
*
|
||||
* Since: 0.9.31
|
||||
**/
|
||||
@ -1667,7 +1701,7 @@ normalize_glyphs_cluster (hb_buffer_t *buffer,
|
||||
|
||||
/**
|
||||
* hb_buffer_normalize_glyphs:
|
||||
* @buffer: a buffer.
|
||||
* @buffer: an #hb_buffer_t.
|
||||
*
|
||||
*
|
||||
*
|
||||
@ -1722,7 +1756,7 @@ hb_buffer_t::sort (unsigned int start, unsigned int end, int(*compar)(const hb_g
|
||||
|
||||
/**
|
||||
* hb_buffer_set_message_func:
|
||||
* @buffer: a buffer.
|
||||
* @buffer: an #hb_buffer_t.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user