107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
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/* harfbuzz-buffer.h: Buffer of glyphs for substitution/positioning
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*
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* Copyrigh 2004 Red Hat Software
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*
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* Portions Copyright 1996-2000 by
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* David Turner, Robert Wilhelm, and Werner Lemberg.
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*
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* This file is part of the FreeType project, and may only be used
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* modified and distributed under the terms of the FreeType project
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* license, LICENSE.TXT. By continuing to use, modify, or distribute
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* this file you indicate that you have read the license and
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* understand and accept it fully.
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*/
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#ifndef HARFBUZZ_BUFFER_H
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#define HARFBUZZ_BUFFER_H
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#include <ft2build.h>
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#include FT_FREETYPE_H
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FT_BEGIN_HEADER
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#define HB_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
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typedef struct HB_GlyphItemRec_ {
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FT_UInt gindex;
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FT_UInt properties;
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FT_UInt cluster;
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FT_UShort component;
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FT_UShort ligID;
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FT_UShort gproperties;
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} HB_GlyphItemRec, *HB_GlyphItem;
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typedef struct HB_PositionRec_ {
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FT_Pos x_pos;
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FT_Pos y_pos;
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FT_Pos x_advance;
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FT_Pos y_advance;
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FT_UShort back; /* number of glyphs to go back
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for drawing current glyph */
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FT_Bool new_advance; /* 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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FT_Short cursive_chain; /* character to which this connects,
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may be positive or negative; used
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only internally */
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} HB_PositionRec, *HB_Position;
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typedef struct HB_BufferRec_{
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FT_Memory memory;
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FT_ULong allocated;
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FT_ULong in_length;
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FT_ULong out_length;
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FT_ULong in_pos;
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FT_ULong out_pos;
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HB_GlyphItem in_string;
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HB_GlyphItem out_string;
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HB_Position positions;
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FT_UShort max_ligID;
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} HB_BufferRec, *HB_Buffer;
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FT_Error
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hb_buffer_new( FT_Memory memory,
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HB_Buffer *buffer );
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FT_Error
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hb_buffer_swap( HB_Buffer buffer );
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FT_Error
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hb_buffer_free( HB_Buffer buffer );
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FT_Error
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hb_buffer_clear( HB_Buffer buffer );
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FT_Error
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hb_buffer_add_glyph( HB_Buffer buffer,
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FT_UInt glyph_index,
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FT_UInt properties,
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FT_UInt cluster );
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FT_Error
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hb_buffer_add_output_glyphs( HB_Buffer buffer,
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FT_UShort num_in,
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FT_UShort num_out,
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FT_UShort *glyph_data,
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FT_UShort component,
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FT_UShort ligID );
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FT_Error
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hb_buffer_add_output_glyph ( HB_Buffer buffer,
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FT_UInt glyph_index,
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FT_UShort component,
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FT_UShort ligID );
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FT_Error
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hb_buffer_copy_output_glyph ( HB_Buffer buffer );
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FT_UShort
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hb_buffer_allocate_ligid( HB_Buffer buffer );
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FT_END_HEADER
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#endif /* HARFBUZZ_BUFFER_H */
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