02b69e4d76
GCC has some optimization for the inclusion guard, but they only work if the check is the outermost one. We're fairly inconsistent because of historical reasons, so we should ensure that we follow the same pattern in every public header.
184 lines
6.3 KiB
C
184 lines
6.3 KiB
C
/* -*- mode:C; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By: Tomas Frydrych <tf@openedhand.com>
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* Emmanuele Bassu <ebassi@linux.intel.com>
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*
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* Copyright (C) 2007, 2008 OpenedHand
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* Copyright (C) 2009 Intel Corp.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __CLUTTER_UNITS_H__
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#define __CLUTTER_UNITS_H__
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#include <glib-object.h>
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#include <cogl/cogl.h>
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G_BEGIN_DECLS
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/**
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* ClutterUnits:
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*
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* An opaque structure, to be used to store sizing and positioning
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* values along with their unit.
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*
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* Since: 1.0
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*/
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typedef struct _ClutterUnits ClutterUnits;
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struct _ClutterUnits
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{
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/*< private >*/
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ClutterUnitType unit_type;
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gfloat value;
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/* pre-filled by the provided constructors */
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/* cached pixel value */
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gfloat pixels;
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/* whether the :pixels field is set */
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guint pixels_set;
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/* the serial coming from the backend, used to evict the cache */
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gint32 serial;
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/* padding for eventual expansion */
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gint32 __padding_1;
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gint64 __padding_2;
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};
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CLUTTER_AVAILABLE_IN_1_0
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GType clutter_units_get_type (void) G_GNUC_CONST;
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CLUTTER_AVAILABLE_IN_1_0
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ClutterUnitType clutter_units_get_unit_type (const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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gfloat clutter_units_get_unit_value (const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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ClutterUnits * clutter_units_copy (const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_free (ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_pixels (ClutterUnits *units,
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gint px);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_em (ClutterUnits *units,
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gfloat em);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_em_for_font (ClutterUnits *units,
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const gchar *font_name,
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gfloat em);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_mm (ClutterUnits *units,
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gfloat mm);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_cm (ClutterUnits *units,
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gfloat cm);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_pt (ClutterUnits *units,
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gfloat pt);
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CLUTTER_AVAILABLE_IN_1_0
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gfloat clutter_units_to_pixels (ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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gboolean clutter_units_from_string (ClutterUnits *units,
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const gchar *str);
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CLUTTER_AVAILABLE_IN_1_0
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gchar * clutter_units_to_string (const ClutterUnits *units);
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/* shorthands for the constructors */
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#define clutter_units_pixels clutter_units_from_pixels
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#define clutter_units_em clutter_units_from_em
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#define clutter_units_em_for_font clutter_units_from_em_for_font
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#define clutter_units_mm clutter_units_from_mm
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#define clutter_units_cm clutter_units_from_cm
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#define clutter_units_pt clutter_units_from_pt
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#define CLUTTER_TYPE_UNITS (clutter_units_get_type ())
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#define CLUTTER_TYPE_PARAM_UNITS (clutter_param_units_get_type ())
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#define CLUTTER_PARAM_SPEC_UNITS(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), CLUTTER_TYPE_PARAM_UNITS, ClutterParamSpecUnits))
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#define CLUTTER_IS_PARAM_SPEC_UNITS(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), CLUTTER_TYPE_PARAM_UNITS))
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/**
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* CLUTTER_VALUE_HOLDS_UNITS:
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* @x: a #GValue
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*
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* Evaluates to %TRUE if @x holds a #ClutterUnits value
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*
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* Since: 0.8
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*/
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#define CLUTTER_VALUE_HOLDS_UNITS(x) (G_VALUE_HOLDS ((x), CLUTTER_TYPE_UNITS))
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typedef struct _ClutterParamSpecUnits ClutterParamSpecUnits;
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/**
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* ClutterParamSpecUnits: (skip)
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* @default_type: default type
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* @default_value: default value
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* @minimum: lower boundary
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* @maximum: higher boundary
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*
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* #GParamSpec subclass for unit based properties.
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*
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* Since: 1.0
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*/
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struct _ClutterParamSpecUnits
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{
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/*< private >*/
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GParamSpec parent_instance;
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/*< public >*/
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ClutterUnitType default_type;
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gfloat default_value;
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gfloat minimum;
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gfloat maximum;
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};
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CLUTTER_AVAILABLE_IN_1_0
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GType clutter_param_units_get_type (void) G_GNUC_CONST;
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CLUTTER_AVAILABLE_IN_1_0
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GParamSpec * clutter_param_spec_units (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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ClutterUnitType default_type,
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gfloat minimum,
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gfloat maximum,
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gfloat default_value,
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GParamFlags flags);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_value_set_units (GValue *value,
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const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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const ClutterUnits * clutter_value_get_units (const GValue *value);
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G_END_DECLS
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#endif /* __CLUTTER_UNITS_H__ */
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