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/* Pango
* pango-font.h: Font handling
*
* 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_FONT_PRIVATE_H__
#define __PANGO_FONT_PRIVATE_H__
#include <pango/pango-font.h>
#include <pango/pango-coverage.h>
#include <pango/pango-types.h>
#include <glib-object.h>
G_BEGIN_DECLS
PANGO_AVAILABLE_IN_ALL
PangoFontMetrics *pango_font_metrics_new (void);
struct _PangoFontMetrics
{
/* <private> */
guint ref_count;
int ascent;
int descent;
int height;
int approximate_char_width;
int approximate_digit_width;
int underline_position;
int underline_thickness;
int strikethrough_position;
int strikethrough_thickness;
};
#define PANGO_FONT_FAMILY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_FONT_FAMILY, PangoFontFamilyClass))
#define PANGO_IS_FONT_FAMILY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_FONT_FAMILY))
#define PANGO_FONT_FAMILY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_FONT_FAMILY, PangoFontFamilyClass))
typedef struct _PangoFontFamilyClass PangoFontFamilyClass;
/**
* PangoFontFamily:
*
* The #PangoFontFamily structure is used to represent a family of related
* font faces. The faces in a family share a common design, but differ in
* slant, weight, width and other aspects.
*/
struct _PangoFontFamily
{
GObject parent_instance;
};
struct _PangoFontFamilyClass
{
GObjectClass parent_class;
/*< public >*/
void (*list_faces) (PangoFontFamily *family,
PangoFontFace ***faces,
int *n_faces);
const char * (*get_name) (PangoFontFamily *family);
gboolean (*is_monospace) (PangoFontFamily *family);
gboolean (*is_variable) (PangoFontFamily *family);
/*< private >*/
/* Padding for future expansion */
void (*_pango_reserved2) (void);
void (*_pango_reserved3) (void);
};
#define PANGO_FONT_FACE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_FONT_FACE, PangoFontFaceClass))
#define PANGO_IS_FONT_FACE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_FONT_FACE))
#define PANGO_FONT_FACE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_FONT_FACE, PangoFontFaceClass))
typedef struct _PangoFontFaceClass PangoFontFaceClass;
/**
* PangoFontFace:
*
* The #PangoFontFace structure is used to represent a group of fonts with
* the same family, slant, weight, width, but varying sizes.
*/
struct _PangoFontFace
{
GObject parent_instance;
};
struct _PangoFontFaceClass
{
GObjectClass parent_class;
/*< public >*/
const char * (*get_face_name) (PangoFontFace *face);
PangoFontDescription * (*describe) (PangoFontFace *face);
void (*list_sizes) (PangoFontFace *face,
int **sizes,
int *n_sizes);
gboolean (*is_synthesized) (PangoFontFace *face);
/*< private >*/
/* Padding for future expansion */
void (*_pango_reserved3) (void);
void (*_pango_reserved4) (void);
};
#define PANGO_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_FONT, PangoFontClass))
#define PANGO_IS_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_FONT))
#define PANGO_FONT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_FONT, PangoFontClass))
typedef struct _PangoFontClass PangoFontClass;
/**
* PangoFont:
*
* The #PangoFont structure is used to represent
* a font in a rendering-system-independent matter.
* To create an implementation of a #PangoFont,
* the rendering-system specific code should allocate
* a larger structure that contains a nested
* #PangoFont, fill in the <structfield>klass</structfield> member of
* the nested #PangoFont with a pointer to
* a appropriate #PangoFontClass, then call
* pango_font_init() on the structure.
*
* The #PangoFont structure contains one member
* which the implementation fills in.
*/
struct _PangoFont
{
GObject parent_instance;
};
struct _PangoFontClass
{
GObjectClass parent_class;
/*< public >*/
PangoFontDescription *(*describe) (PangoFont *font);
PangoCoverage * (*get_coverage) (PangoFont *font,
PangoLanguage *language);
void (*get_glyph_extents) (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
PangoFontMetrics * (*get_metrics) (PangoFont *font,
PangoLanguage *language);
PangoFontMap * (*get_font_map) (PangoFont *font);
PangoFontDescription *(*describe_absolute) (PangoFont *font);
void (*get_features) (PangoFont *font,
hb_feature_t *features,
guint len,
guint *num_features);
hb_font_t * (*create_hb_font) (PangoFont *font);
};
/* used for very rare and miserable situtations that we cannot even
* draw a hexbox
*/
#define PANGO_UNKNOWN_GLYPH_WIDTH 10
#define PANGO_UNKNOWN_GLYPH_HEIGHT 14
G_END_DECLS
#endif /* __PANGO_FONT_PRIVATE_H__ */
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