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/* harfbuzz-buffer.h: Buffer of glyphs for substitution/positioning
*
* Copyrigh 2004 Red Hat Software
*
* Portions Copyright 1996-2000 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used
* modified and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*/
#ifndef HARFBUZZ_BUFFER_H
#define HARFBUZZ_BUFFER_H
#include <ft2build.h>
#include FT_FREETYPE_H
FT_BEGIN_HEADER
#define HB_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
typedef struct HB_GlyphItemRec_ {
FT_UInt gindex;
FT_UInt properties;
FT_UInt cluster;
FT_UShort component;
FT_UShort ligID;
FT_UShort gproperties;
} HB_GlyphItemRec, *HB_GlyphItem;
typedef struct HB_PositionRec_ {
FT_Pos x_pos;
FT_Pos y_pos;
FT_Pos x_advance;
FT_Pos y_advance;
FT_UShort back; /* number of glyphs to go back
for drawing current glyph */
FT_Bool new_advance; /* if set, the advance width values are
absolute, i.e., they won't be
added to the original glyph's value
but rather replace them. */
FT_Short cursive_chain; /* character to which this connects,
may be positive or negative; used
only internally */
} HB_PositionRec, *HB_Position;
typedef struct HB_BufferRec_{
FT_Memory memory;
FT_ULong allocated;
FT_ULong in_length;
FT_ULong out_length;
FT_ULong in_pos;
FT_ULong out_pos;
FT_Bool inplace;
HB_GlyphItem in_string;
HB_GlyphItem out_string;
HB_GlyphItem alt_string;
HB_Position positions;
FT_UShort max_ligID;
} HB_BufferRec, *HB_Buffer;
HB_Error
hb_buffer_new( FT_Memory memory,
HB_Buffer *buffer );
void
hb_buffer_swap( HB_Buffer buffer );
void
hb_buffer_free( HB_Buffer buffer );
void
hb_buffer_clear( HB_Buffer buffer );
void
hb_buffer_clear_output( HB_Buffer buffer );
HB_Error
hb_buffer_add_glyph( HB_Buffer buffer,
FT_UInt glyph_index,
FT_UInt properties,
FT_UInt cluster );
HB_Error
hb_buffer_add_output_glyphs( HB_Buffer buffer,
FT_UShort num_in,
FT_UShort num_out,
FT_UShort *glyph_data,
FT_UShort component,
FT_UShort ligID );
HB_Error
hb_buffer_add_output_glyph ( HB_Buffer buffer,
FT_UInt glyph_index,
FT_UShort component,
FT_UShort ligID );
HB_Error
hb_buffer_copy_output_glyph ( HB_Buffer buffer );
HB_Error
hb_buffer_replace_output_glyph ( HB_Buffer buffer,
FT_UInt glyph_index,
FT_Bool inplace );
FT_UShort
hb_buffer_allocate_ligid( HB_Buffer buffer );
FT_END_HEADER
#endif /* HARFBUZZ_BUFFER_H */
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