c29a3b4dee
To avoid clashing with all the scripted changes, clutter-fixed.h and clutter-units.h were manually converted to internally use floats instead of 16.16 fixed numbers. Note: again no API changes were made in Clutter.
338 lines
7.5 KiB
C
338 lines
7.5 KiB
C
/*
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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 Matthew Allum <mallum@openedhand.com>
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* Tomas Frydrych <tf@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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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."
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#endif
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#ifndef __CLUTTER_FIXED_H__
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#define __CLUTTER_FIXED_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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* ClutterFixed:
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*
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* Fixed point number (16.16)
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*/
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typedef float ClutterFixed;
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/**
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* ClutterAngle:
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*
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* An abstract representation of an angle.
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*/
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typedef float ClutterAngle;
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#define CLUTTER_ANGLE_FROM_DEG(x) ((float)(x))
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#define CLUTTER_ANGLE_FROM_DEGX(x) (CLUTTER_FIXED_TO_FLOAT (x))
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#define CLUTTER_ANGLE_TO_DEG(x) ((float)(x))
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#define CLUTTER_ANGLE_TO_DEGX(x) (CLUTTER_FLOAT_TO_FIXED (x))
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/*
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* some commonly used constants
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*/
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/**
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* CFX_ONE:
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*
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* 1.0 represented as a fixed point value.
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*/
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#define CFX_ONE 1.0
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/**
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* CFX_HALF:
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*
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* 0.5 represented as a fixed point value.
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*/
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#define CFX_HALF 0.5
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/**
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* CFX_MAX:
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*
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* Maximum fixed point value.
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*/
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#define CFX_MAX G_MAXFLOAT
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/**
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* CFX_MIN:
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*
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* Minimum fixed point value.
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*/
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#define CFX_MIN (-G_MAXFLOAT)
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/**
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* CFX_PI:
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*
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* Fixed point representation of Pi
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*/
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#define CFX_PI G_PI
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/**
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* CFX_2PI:
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*
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* Fixed point representation of Pi*2
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*/
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#define CFX_2PI (G_PI * 2)
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/**
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* CFX_PI_2:
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*
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* Fixed point representation of Pi/2
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*/
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#define CFX_PI_2 (G_PI / 2)
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/**
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* CFX_PI_4:
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*
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* Fixed point representation of Pi/4
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*/
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#define CFX_PI_4 (G_PI / 4)
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/**
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* CFX_360:
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*
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* Fixed point representation of the number 360
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*/
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#define CFX_360 360.0
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/**
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* CFX_240:
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*
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* Fixed point representation of the number 240
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*/
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#define CFX_240 240.0
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/**
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* CFX_180:
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*
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* Fixed point representation of the number 180
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*/
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#define CFX_180 180.0
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/**
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* CFX_120:
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*
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* Fixed point representation of the number 120
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*/
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#define CFX_120 120.0
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/**
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* CFX_60:
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*
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* Fixed point representation of the number 60
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*/
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#define CFX_60 60.0
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/**
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* CFX_RADIANS_TO_DEGREES:
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*
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* Fixed point representation of the number 180 / pi
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*/
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#define CFX_RADIANS_TO_DEGREES (180.0 / G_PI)
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/**
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* CFX_255:
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*
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* Fixed point representation of the number 255
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*/
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#define CFX_255 255.0
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/**
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* CLUTTER_FIXED_TO_FLOAT:
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* @x: a fixed point value
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*
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* Convert a fixed point value to float.
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*/
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#define CLUTTER_FIXED_TO_FLOAT(x) (x)
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/**
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* CLUTTER_FIXED_TO_DOUBLE:
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* @x: a fixed point value
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*
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* Convert a fixed point value to double.
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*/
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#define CLUTTER_FIXED_TO_DOUBLE(x) ((double)(x))
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/**
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* CLUTTER_FLOAT_TO_FIXED:
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* @x: a floating point value
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*
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* Convert a float value to fixed.
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*/
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#define CLUTTER_FLOAT_TO_FIXED(x) ((x))
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/**
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* CLUTTER_FLOAT_TO_INT:
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* @x: a floating point value
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*
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* Convert a float value to int.
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*/
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#define CLUTTER_FLOAT_TO_INT(x) ((int)(x))
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/**
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* CLUTTER_FLOAT_TO_UINT:
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* @x: a floating point value
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*
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* Convert a float value to unsigned int.
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*/
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#define CLUTTER_FLOAT_TO_UINT(x) ((unsigned int)(x))
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/**
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* CLUTTER_INT_TO_FIXED:
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* @x: an integer value
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*
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* Convert an integer value to fixed point.
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*/
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#define CLUTTER_INT_TO_FIXED(x) ((float)(x))
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/**
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* CLUTTER_FIXED_TO_INT:
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* @x: a fixed point value
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*
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* Converts a fixed point value to integer (removing the decimal part).
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*
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* Since: 0.6
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*/
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#define CLUTTER_FIXED_TO_INT(x) ((int)(x))
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/**
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* CLUTTER_FIXED_FRACTION:
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* @x: a fixed point value
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*
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* Retrieves the fractionary part of a fixed point value
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*/
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#define CLUTTER_FIXED_FRACTION(x) ((x)-floorf (x))
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/**
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* CLUTTER_FIXED_FLOOR:
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* @x: a fixed point value
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*
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* Round down a fixed point value to an integer.
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*/
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#define CLUTTER_FIXED_FLOOR(x) (floorf (x))
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/**
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* CLUTTER_FIXED_CEIL:
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* @x: a fixed point value
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*
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* Round up a fixed point value to an integer.
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*/
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#define CLUTTER_FIXED_CEIL(x) (ceilf (x))
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/**
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* CLUTTER_FIXED_MUL:
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* @x: a fixed point value
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* @y: a fixed point value
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*
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* Multiply two fixed point values
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*/
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#define CLUTTER_FIXED_MUL(x,y) ((x) * (y))
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/**
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* CLUTTER_FIXED_DIV:
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* @x: a fixed point value
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* @y: a fixed point value
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*
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* Divide two fixed point values
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*/
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#define CLUTTER_FIXED_DIV(x,y) ((x) / (y))
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#define clutter_qmulx(x,y) ((x) * (y))
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#define clutter_qdivx(x,y) ((x) / (y))
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#define clutter_sinx(a) sinf (a * (G_PI/180.0))
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#define clutter_tanx(a) tanf (a * (G_PI/180.0))
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#define clutter_atanx(a) atanf (a * (G_PI/180.0))
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#define clutter_atan2x(x,y) atan2f (x, y)
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#define clutter_cosx(a) cosf (a * (G_PI/180.0))
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#define CLUTTER_TYPE_FIXED (clutter_fixed_get_type ())
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#define CLUTTER_TYPE_PARAM_FIXED (clutter_param_fixed_get_type ())
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#define CLUTTER_PARAM_SPEC_FIXED(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), CLUTTER_TYPE_PARAM_FIXED, ClutterParamSpecFixed))
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#define CLUTTER_IS_PARAM_SPEC_FIXED(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), CLUTTER_TYPE_PARAM_FIXED))
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/**
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* CLUTTER_VALUE_HOLDS_FIXED:
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* @x: a #GValue
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*
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* Evaluates to %TRUE if @x holds a #ClutterFixed.
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*
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* Since: 0.8
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*/
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#define CLUTTER_VALUE_HOLDS_FIXED(x) (G_VALUE_HOLDS ((x), CLUTTER_TYPE_FIXED))
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typedef struct _ClutterParamSpecFixed ClutterParamSpecFixed;
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/**
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* CLUTTER_MAXFIXED:
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*
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* Higher boundary for #ClutterFixed
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*
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* Since: 0.8
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*/
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#define CLUTTER_MAXFIXED G_MAXFLOAT
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/**
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* CLUTTER_MINFIXED:
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*
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* Lower boundary for #ClutterFixed
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*
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* Since: 0.8
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*/
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#define CLUTTER_MINFIXED (-G_MAXFLOAT)
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/**
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* ClutterParamSpecFixed
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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 fixed point based properties
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*
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* Since: 0.8
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*/
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struct _ClutterParamSpecFixed
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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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ClutterFixed minimum;
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ClutterFixed maximum;
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ClutterFixed default_value;
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};
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GType clutter_fixed_get_type (void) G_GNUC_CONST;
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GType clutter_param_fixed_get_type (void) G_GNUC_CONST;
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void clutter_value_set_fixed (GValue *value,
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ClutterFixed fixed_);
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ClutterFixed clutter_value_get_fixed (const GValue *value);
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GParamSpec * clutter_param_spec_fixed (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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ClutterFixed minimum,
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ClutterFixed maximum,
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ClutterFixed default_value,
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GParamFlags flags);
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G_END_DECLS
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#endif /* __CLUTTER_FIXED_H__ */
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