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/* -*- mode:C; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Tomas Frydrych <tf@openedhand.com>
*
* Copyright (C) 2007 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 _HAVE_EGG_UNITS_H
#define _HAVE_EGG_UNITS_H
#include <glib-object.h>
#include <egg/egg-fixed.h>
G_BEGIN_DECLS
/**
* EggUnit:
*
* Device independent unit used by Egg. The value held can be transformed
* into other units, likes pixels.
*
* Since: 0.4
*/
typedef gint32 EggUnit;
/*
* Currently EGG_UNIT maps directly onto EggFixed. Nevertheless, the
* _FROM_FIXED and _TO_FIXED macros should always be used in case that we
* decide to change this relationship in the future.
*/
#define EGG_UNITS_FROM_INT(x) EGG_INT_TO_FIXED ((x))
#define EGG_UNITS_TO_INT(x) EGG_FIXED_TO_INT ((x))
#define EGG_UNITS_FROM_FLOAT(x) EGG_FLOAT_TO_FIXED ((x))
#define EGG_UNITS_TO_FLOAT(x) EGG_FIXED_TO_FLOAT ((x))
#define EGG_UNITS_FROM_FIXED(x) (x)
#define EGG_UNITS_TO_FIXED(x) (x)
/**
* EGG_UNITS_FROM_DEVICE:
* @x: value in pixels
*
* Converts @x from pixels to #EggUnit<!-- -->s
*
* Since: 0.6
*/
#define EGG_UNITS_FROM_DEVICE(x) EGG_UNITS_FROM_INT ((x))
/**
* EGG_UNITS_TO_DEVICE:
* @x: value in #EggUnit<!-- -->s
*
* Converts @x from #EggUnit<!-- -->s to pixels
*
* Since: 0.6
*/
#define EGG_UNITS_TO_DEVICE(x) EGG_UNITS_TO_INT ((x))
#define EGG_UNITS_TMP_FROM_DEVICE(x) (x)
#define EGG_UNITS_TMP_TO_DEVICE(x) (x)
/**
* EGG_UNITS_FROM_PANGO_UNIT:
* @x: value in Pango units
*
* Converts a value in Pango units to #EggUnit<!-- -->s
*
* Since: 0.6
*/
#define EGG_UNITS_FROM_PANGO_UNIT(x) ((x) << 6)
/**
* EGG_UNITS_TO_PANGO_UNIT:
* @x: value in #EggUnit<!-- -->s
*
* Converts a value in #EggUnit<!-- -->s to Pango units
*
* Since: 0.6
*/
#define EGG_UNITS_TO_PANGO_UNIT(x) ((x) >> 6)
#define EGG_UNITS_FROM_STAGE_WIDTH_PERCENTAGE(x) \
((egg_actor_get_widthu (egg_stage_get_default ()) * x) / 100)
#define EGG_UNITS_FROM_STAGE_HEIGHT_PERCENTAGE(x) \
((egg_actor_get_heightu (egg_stage_get_default ()) * x) / 100)
#define EGG_UNITS_FROM_PARENT_WIDTH_PERCENTAGE(a, x) \
((egg_actor_get_widthu (egg_actor_get_parent (a)) * x) / 100)
#define EGG_UNITS_FROM_PARENT_HEIGHT_PERCENTAGE(a, x) \
((egg_actor_get_heightu (egg_actor_get_parent (a)) * x) / 100)
/**
* EGG_UNITS_FROM_MM:
* @x: a value in millimeters
*
* Converts a value in millimeters into #EggUnit<!-- -->s
*
* Since: 0.6
*/
#define EGG_UNITS_FROM_MM(x) \
(EGG_UNITS_FROM_FLOAT ((((x) * egg_stage_get_resolution ((EggStage *) egg_stage_get_default ())) / 25.4)))
#define EGG_UNITS_FROM_MMX(x) \
(CFX_DIV (CFX_MUL ((x), egg_stage_get_resolutionx ((EggStage *) egg_stage_get_default ())), 0x196666))
/**
* EGG_UNITS_FROM_POINTS:
* @x: a value in typographic points
*
* Converts a value in typographic points into #EggUnit<!-- -->s
*
* Since: 0.6
*/
#define EGG_UNITS_FROM_POINTS(x) \
EGG_UNITS_FROM_FLOAT ((((x) * egg_stage_get_resolution ((EggStage *) egg_stage_get_default ())) / 72.0))
#define EGG_UNITS_FROM_POINTSX(x) \
(CFX_MUL ((x), egg_stage_get_resolutionx ((EggStage *) egg_stage_get_default ())) / 72)
#define EGG_TYPE_UNIT (egg_unit_get_type ())
#define EGG_TYPE_PARAM_UNIT (egg_param_unit_get_type ())
#define EGG_PARAM_SPEC_UNIT(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), EGG_TYPE_PARAM_UNIT, EggParamSpecUnit))
#define EGG_IS_PARAM_SPEC_UNIT(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), EGG_TYPE_PARAM_UNIT))
/**
* EGG_MAXUNIT:
*
* Higher boundary for a #EggUnit
*
* Since: 0.8
*/
#define EGG_MAXUNIT (0x7fffffff)
/**
* EGG_MINUNIT:
*
* Lower boundary for a #EggUnit
*
* Since: 0.8
*/
#define EGG_MINUNIT (0x80000000)
/**
* EGG_VALUE_HOLDS_UNIT:
* @x: a #GValue
*
* Evaluates to %TRUE if @x holds #EggUnit<!-- -->s.
*
* Since: 0.8
*/
#define EGG_VALUE_HOLDS_UNIT(x) (G_VALUE_HOLDS ((x), EGG_TYPE_UNIT))
typedef struct _EggParamSpecUnit EggParamSpecUnit;
/**
* EggParamSpecUnit:
* @minimum: lower boundary
* @maximum: higher boundary
* @default_value: default value
*
* #GParamSpec subclass for unit based properties.
*
* Since: 0.8
*/
struct _EggParamSpecUnit
{
/*< private >*/
GParamSpec parent_instance;
/*< public >*/
EggUnit minimum;
EggUnit maximum;
EggUnit default_value;
};
GType egg_unit_get_type (void) G_GNUC_CONST;
GType egg_param_unit_get_type (void) G_GNUC_CONST;
void egg_value_set_unit (GValue *value,
EggUnit units);
EggUnit egg_value_get_unit (const GValue *value);
GParamSpec *egg_param_spec_unit (const gchar *name,
const gchar *nick,
const gchar *blurb,
EggUnit minimum,
EggUnit maximum,
EggUnit default_value,
GParamFlags flags);
G_END_DECLS
#endif /* _HAVE_EGG_UNITS_H */
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