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/* Pango
* pango-types.h:
*
* Copyright (C) 1999 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_TYPES_H__
#define __PANGO_TYPES_H__
#include <glib.h>
#include <glib-object.h>
G_BEGIN_DECLS
typedef struct _PangoLogAttr PangoLogAttr;
typedef struct _PangoEngineLang PangoEngineLang;
typedef struct _PangoEngineShape PangoEngineShape;
typedef struct _PangoFont PangoFont;
typedef struct _PangoMatrix PangoMatrix;
typedef struct _PangoRectangle PangoRectangle;
/* Dummy typedef - internally it's a 'const char *' */
typedef struct _PangoLanguage PangoLanguage;
/* A index of a glyph into a font. Rendering system dependent
*/
typedef guint32 PangoGlyph;
/* A rectangle. Used to store logical and physical extents of glyphs,
* runs, strings, etc.
*/
struct _PangoRectangle
{
int x;
int y;
int width;
int height;
};
/**
* PangoMatrix:
* @xx: 1st component of the transformation matrix
* @xy: 2nd component of the transformation matrix
* @yx: 3rd component of the transformation matrix
* @yy: 4th component of the transformation matrix
* @x0: x translation
* @y0: y translation
*
* A structure specifying a transformation between user-space
* coordinates and device coordinates. The transformation
* is given by
*
* <programlisting>
* x_device = x_user * matrix->xx + y_user * matrix->xy + matrix->x0;
* y_device = x_user * matrix->yx + y_user * matrix->yy + matrix->y0;
* </programlisting>
**/
struct _PangoMatrix
{
double xx;
double xy;
double yx;
double yy;
double x0;
double y0;
};
/**
* PANGO_MATRIX_INIT
*
* Constant that can be used to initialize a PangoMatrix to
* the identity transform.
*
* <informalexample><programlisting>
* PangoMatrix matrix = PANGO_MATRIX_INIT;
* pango_matrix_rotate (&matrix, 45.);
* </programlisting></informalexample>
**/
#define PANGO_MATRIX_INIT { 1., 0., 0., 1., 0., 0. }
PangoMatrix *pango_matrix_copy (const PangoMatrix *matrix);
void pango_matrix_free (PangoMatrix *matrix);
void pango_matrix_translate (PangoMatrix *matrix,
double tx,
double ty);
void pango_matrix_scale (PangoMatrix *matrix,
double scale_x,
double scale_y);
void pango_matrix_rotate (PangoMatrix *matrix,
double degrees);
void pango_matrix_concat (PangoMatrix *matrix,
PangoMatrix *new_matrix);
#define PANGO_SCALE 1024
#define PANGO_PIXELS(d) (((int)(d) + 512) >> 10)
/* The above expression is just slightly wrong for floating point d;
* We'd expect -512.5 => -1 but instead we get 0. That's unlikely
* to matter for practical use and the expression is much more
* compact and faster than alternatives that work exactly for both
* integers and floating point.
*/
/* Macros to translate from extents rectangles to ascent/descent/lbearing/rbearing
*/
#define PANGO_ASCENT(rect) (-(rect).y)
#define PANGO_DESCENT(rect) ((rect).y + (rect).height)
#define PANGO_LBEARING(rect) ((rect).x)
#define PANGO_RBEARING(rect) ((rect).x + (rect).width)
/**
* PangoDirection:
* @PANGO_DIRECTION_LTR: A strong left-to-right direction
* @PANGO_DIRECTION_RTL: A strong right-to-left direction
* @PANGO_DIRECTION_TTB_LTR: Deprecated value; treated the
* same as %PANGO_DIRECTION_RTL.
* @PANGO_DIRECTION_TTB_RTL: Deprecated value; treated the
* same as PANGO_DIRECTION_LTR
* @PANGO_DIRECTION_WEAK_LTR: A weak left-to-right direction
* @PANGO_DIRECTION_WEAK_RTL: A weak right-to-left direction
* @PANGO_DIRECTION_NEUTRAL: No direction specified
*
* The #PangoDirection type represents a direction in the
* Unicode bidirectional algorithm; not every value in this
* enumeration makes sense for every usage of #PangoDirection;
* for example, the return value of pango_unichar_direction()
* and pango_find_base_direction() cannot be %PANGO_DIRECTION_WEAK_LTR
* or %PANGO_DIRECTION_WEAK_RTL, since every character is either
* neutral or has a strong direction; on the other hand
* %PANGO_DIRECTION_NEUTRAL doesn't make sense to pass
* to pango_log2vis_get_embedding_levels().
*
* The %PANGO_DIRECTION_TTB_LTR, %PANGO_DIRECTION_TTB_RTL
* values come from an earlier interpretation of this
* enumeration as the writing direction of a block of
* text and are no longer used; See the Text module of the
* CSS3 spec for how vertical text is planned to be handled
* in a future version of Pango. The explanation of why
* %PANGO_DIRECTION_TTB_LTR is treated as %PANGO_DIRECTION_RTL
* can be found there as well.
**/
typedef enum {
PANGO_DIRECTION_LTR,
PANGO_DIRECTION_RTL,
PANGO_DIRECTION_TTB_LTR,
PANGO_DIRECTION_TTB_RTL,
PANGO_DIRECTION_WEAK_LTR,
PANGO_DIRECTION_WEAK_RTL,
PANGO_DIRECTION_NEUTRAL
} PangoDirection;
#define PANGO_TYPE_LANGUAGE (pango_language_get_type ())
GType pango_language_get_type (void);
PangoLanguage *pango_language_from_string (const char *language);
#define pango_language_to_string(language) ((const char *)language)
gboolean pango_language_matches (PangoLanguage *language,
const char *range_list);
#ifndef PANGO_DISABLE_DEPRECATED
gboolean pango_get_mirror_char (gunichar ch,
gunichar *mirrored_ch);
#endif
PangoDirection pango_unichar_direction (gunichar ch);
PangoDirection pango_find_base_dir (const gchar *text,
gint length);
G_END_DECLS
#endif /* __PANGO_TYPES_H__ */
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