f2c25fd4f7
Currently, the conversion from em to units is done by using the default font name inside the backend. For actors using their own font/text layout we need a way to specify the font name along with the quantity we wish to transform.
279 lines
6.8 KiB
C
279 lines
6.8 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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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly.h"
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#endif
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#ifndef __CLUTTER_UNITS_H__
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#define __CLUTTER_UNITS_H__
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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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* ClutterUnit:
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*
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* Device independent unit used by Clutter. The value held can be
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* transformed into other units, likes pixels
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*
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* Since: 0.4
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*/
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typedef float ClutterUnit;
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/**
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* CLUTTER_UNITS_FROM_INT:
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* @x: integer value
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*
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* Converts @x from an integer value to #ClutterUnit<!-- -->s
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_FROM_INT(x) ((float)(x))
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/**
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* CLUTTER_UNITS_TO_INT:
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* @x: value in #ClutterUnit<!-- -->s
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*
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* Converts @x from a #ClutterUnit value into an integer
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_TO_INT(x) ((int)(x))
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/**
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* CLUTTER_UNITS_FROM_FLOAT:
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* @x: float value
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*
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* Converts @x from a floating point value to #ClutterUnit<!-- -->s
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_FROM_FLOAT(x) (x)
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/**
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* CLUTTER_UNITS_TO_FLOAT:
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* @x: value in #ClutterUnit<!-- -->s
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*
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* Converts @x from a #ClutterUnit value into a float
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_TO_FLOAT(x) (x)
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/**
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* CLUTTER_UNITS_FROM_FIXED:
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* @x: #CoglFixed value
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*
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* Converts @x from a fixed point value to #ClutterUnit<!-- -->s
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_FROM_FIXED(x) (COGL_FIXED_TO_FLOAT (x))
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/**
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* CLUTTER_UNITS_TO_FIXED:
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* @x: value in #ClutterUnit<!-- -->s
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*
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* Converts @x from a #ClutterUnit value into a #CoglFixed
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_TO_FIXED(x) (COGL_FIXED_FROM_FLOAT (x))
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/**
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* CLUTTER_UNITS_FORMAT:
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*
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* Format string that should be used for scanning and printing units.
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* It is a string literal, but it does not include the percent sign to
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* allow precision and length modifiers between the percent sign and
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* the format:
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*
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* |[
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* g_print ("%" CLUTTER_UNITS_FORMAT, units);
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* ]|
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*
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* Since: 1.0
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*/
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#define CLUTTER_UNITS_FORMAT "f"
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/**
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* CLUTTER_UNITS_FROM_DEVICE:
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* @x: value in pixels
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*
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* Converts @x from pixels to #ClutterUnit<!-- -->s
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_FROM_DEVICE(x) (clutter_units_pixels ((x)))
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/**
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* CLUTTER_UNITS_TO_DEVICE:
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* @x: value in #ClutterUnit<!-- -->s
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*
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* Converts @x from #ClutterUnit<!-- -->s to pixels
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_TO_DEVICE(x) (clutter_units_to_pixels ((x)))
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/**
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* CLUTTER_UNITS_FROM_PANGO_UNIT:
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* @x: value in Pango units
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*
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* Converts a value in Pango units to #ClutterUnit<!-- -->s
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_FROM_PANGO_UNIT(x) ((float)((x) / 1024.0))
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/**
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* CLUTTER_UNITS_TO_PANGO_UNIT:
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* @x: value in #ClutterUnit<!-- -->s
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*
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* Converts a value in #ClutterUnit<!-- -->s to Pango units
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_TO_PANGO_UNIT(x) ((int)((x) * 1024))
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/**
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* CLUTTER_UNITS_FROM_MM:
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* @x: a value in millimeters
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*
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* Converts a value in millimeters into #ClutterUnit<!-- -->s
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_FROM_MM(x) (clutter_units_mm (x))
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/**
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* CLUTTER_UNITS_FROM_POINTS:
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* @x: a value in typographic points
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*
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* Converts a value in typographic points into #ClutterUnit<!-- -->s
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*
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* Since: 0.6
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*/
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#define CLUTTER_UNITS_FROM_POINTS(x) (clutter_units_pt (x))
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/**
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* CLUTTER_UNITS_FROM_EM:
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* @x: a value in em
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*
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* Converts a value in em into #ClutterUnit<!-- -->s
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*
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* Since: 1.0
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*/
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#define CLUTTER_UNITS_FROM_EM(x) (clutter_units_em (x))
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ClutterUnit clutter_units_mm (gdouble mm);
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ClutterUnit clutter_units_pt (gdouble pt);
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ClutterUnit clutter_units_em (gdouble em);
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ClutterUnit clutter_units_em_for_font (const gchar *font_name,
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gdouble em);
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ClutterUnit clutter_units_pixels (gint px);
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gint clutter_units_to_pixels (ClutterUnit units);
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#define CLUTTER_TYPE_UNIT (clutter_unit_get_type ())
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#define CLUTTER_TYPE_PARAM_UNIT (clutter_param_unit_get_type ())
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#define CLUTTER_PARAM_SPEC_UNIT(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), CLUTTER_TYPE_PARAM_UNIT, ClutterParamSpecUnit))
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#define CLUTTER_IS_PARAM_SPEC_UNIT(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), CLUTTER_TYPE_PARAM_UNIT))
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/**
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* CLUTTER_MAXUNIT:
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*
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* Higher boundary for a #ClutterUnit
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*
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* Since: 0.8
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*/
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#define CLUTTER_MAXUNIT (G_MAXFLOAT)
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/**
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* CLUTTER_MINUNIT:
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*
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* Lower boundary for a #ClutterUnit
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*
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* Since: 0.8
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*/
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#define CLUTTER_MINUNIT (-G_MAXFLOAT)
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/**
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* CLUTTER_VALUE_HOLDS_UNIT:
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* @x: a #GValue
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*
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* Evaluates to %TRUE if @x holds #ClutterUnit<!-- -->s.
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*
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* Since: 0.8
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*/
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#define CLUTTER_VALUE_HOLDS_UNIT(x) (G_VALUE_HOLDS ((x), CLUTTER_TYPE_UNIT))
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typedef struct _ClutterParamSpecUnit ClutterParamSpecUnit;
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/**
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* ClutterParamSpecUnit:
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* @minimum: lower boundary
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* @maximum: higher boundary
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* @default_value: default value
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*
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* #GParamSpec subclass for unit based properties.
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*
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* Since: 0.8
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*/
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struct _ClutterParamSpecUnit
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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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ClutterUnit minimum;
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ClutterUnit maximum;
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ClutterUnit default_value;
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};
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GType clutter_unit_get_type (void) G_GNUC_CONST;
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GType clutter_param_unit_get_type (void) G_GNUC_CONST;
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void clutter_value_set_unit (GValue *value,
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ClutterUnit units);
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ClutterUnit clutter_value_get_unit (const GValue *value);
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GParamSpec *clutter_param_spec_unit (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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ClutterUnit minimum,
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ClutterUnit maximum,
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ClutterUnit default_value,
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GParamFlags flags);
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G_END_DECLS
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#endif /* __CLUTTER_UNITS_H__ */
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