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* Copyright (C) 1998-2004 David Turner and Werner Lemberg
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* Copyright (C) 2004,2007,2009 Red Hat, Inc.
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* This is part of HarfBuzz, an OpenType Layout engine library.
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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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* 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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* 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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* Red Hat Author(s): Owen Taylor, Behdad Esfahbod
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#include "hb-common.h"
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typedef struct _hb_buffer_t hb_buffer_t;
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typedef enum _hb_direction_t {
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typedef struct _hb_glyph_info_t {
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hb_codepoint_t codepoint;
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typedef struct _hb_glyph_position_t {
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hb_position_t x_advance;
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hb_position_t y_advance;
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/* XXX these should all be replaced by "uint32_t internal" */
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uint32_t new_advance :1; /* if set, the advance width values are
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absolute, i.e., they won't be
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added to the original glyph's value
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but rather replace them */
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uint32_t back : 15; /* number of glyphs to go back
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for drawing current glyph */
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int32_t cursive_chain : 16; /* character to which this connects,
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may be positive or negative; used
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} hb_glyph_position_t;
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hb_buffer_create (unsigned int pre_alloc_size);
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hb_buffer_reference (hb_buffer_t *buffer);
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hb_buffer_get_reference_count (hb_buffer_t *buffer);
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hb_buffer_destroy (hb_buffer_t *buffer);
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hb_buffer_set_direction (hb_buffer_t *buffer,
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hb_direction_t direction);
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hb_buffer_get_direction (hb_buffer_t *buffer);
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hb_buffer_clear (hb_buffer_t *buffer);
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hb_buffer_clear_positions (hb_buffer_t *buffer);
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hb_buffer_ensure (hb_buffer_t *buffer,
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hb_buffer_reverse (hb_buffer_t *buffer);
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/* Filling the buffer in */
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hb_buffer_add_glyph (hb_buffer_t *buffer,
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hb_codepoint_t codepoint,
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unsigned int cluster);
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hb_buffer_add_utf8 (hb_buffer_t *buffer,
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unsigned int text_length,
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unsigned int item_offset,
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unsigned int item_length);
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hb_buffer_add_utf16 (hb_buffer_t *buffer,
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const uint16_t *text,
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unsigned int text_length,
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unsigned int item_offset,
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unsigned int item_length);
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hb_buffer_add_utf32 (hb_buffer_t *buffer,
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const uint32_t *text,
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unsigned int text_length,
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unsigned int item_offset,
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unsigned int item_length);
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/* Getting glyphs out of the buffer */
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/* Return value valid as long as buffer not modified */
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hb_buffer_get_len (hb_buffer_t *buffer);
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/* Return value valid as long as buffer not modified */
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hb_buffer_get_glyph_infos (hb_buffer_t *buffer);
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/* Return value valid as long as buffer not modified */
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hb_glyph_position_t *
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hb_buffer_get_glyph_positions (hb_buffer_t *buffer);
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#endif /* HB_BUFFER_H */
added
removed
pango/opentype/hb-buffer.h
