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/* Pango
* pango-glyph.h: Glyph storage
*
* Copyright (C) 2000 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PANGO_GLYPH_H__
#define __PANGO_GLYPH_H__
#include <pango/pango-types.h>
#include <pango/pango-item.h>
G_BEGIN_DECLS
typedef struct _PangoGlyphGeometry PangoGlyphGeometry;
typedef struct _PangoGlyphVisAttr PangoGlyphVisAttr;
typedef struct _PangoGlyphInfo PangoGlyphInfo;
typedef struct _PangoGlyphString PangoGlyphString;
/* 1024ths of a device unit */
typedef gint32 PangoGlyphUnit;
/* Positioning information about a glyph
*/
struct _PangoGlyphGeometry
{
PangoGlyphUnit width;
PangoGlyphUnit x_offset;
PangoGlyphUnit y_offset;
};
/* Visual attributes of a glyph
*/
struct _PangoGlyphVisAttr
{
guint is_cluster_start : 1;
};
/* A single glyph
*/
struct _PangoGlyphInfo
{
PangoGlyph glyph;
PangoGlyphGeometry geometry;
PangoGlyphVisAttr attr;
};
/* A string of glyphs with positional information and visual attributes -
* ready for drawing
*/
struct _PangoGlyphString {
gint num_glyphs;
PangoGlyphInfo *glyphs;
/* This is a memory inefficient way of representing the information
* here - each value gives the byte index within the text
* corresponding to the glyph string of the start of the cluster to
* which the glyph belongs.
*/
gint *log_clusters;
/*< private >*/
gint space;
};
#define PANGO_TYPE_GLYPH_STRING (pango_glyph_string_get_type ())
PangoGlyphString *pango_glyph_string_new (void);
void pango_glyph_string_set_size (PangoGlyphString *string,
gint new_len);
GType pango_glyph_string_get_type (void) G_GNUC_CONST;
PangoGlyphString *pango_glyph_string_copy (PangoGlyphString *string);
void pango_glyph_string_free (PangoGlyphString *string);
void pango_glyph_string_extents (PangoGlyphString *glyphs,
PangoFont *font,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
int pango_glyph_string_get_width(PangoGlyphString *glyphs) G_GNUC_PURE;
void pango_glyph_string_extents_range (PangoGlyphString *glyphs,
int start,
int end,
PangoFont *font,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
void pango_glyph_string_get_logical_widths (PangoGlyphString *glyphs,
const char *text,
int length,
int embedding_level,
int *logical_widths);
void pango_glyph_string_index_to_x (PangoGlyphString *glyphs,
char *text,
int length,
PangoAnalysis *analysis,
int index_,
gboolean trailing,
int *x_pos);
void pango_glyph_string_x_to_index (PangoGlyphString *glyphs,
char *text,
int length,
PangoAnalysis *analysis,
int x_pos,
int *index_,
int *trailing);
/* Turn a string of characters into a string of glyphs
*/
void pango_shape (const gchar *text,
gint length,
const PangoAnalysis *analysis,
PangoGlyphString *glyphs);
GList *pango_reorder_items (GList *logical_items);
G_END_DECLS
#endif /* __PANGO_GLYPH_H__ */
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