mirror of
https://github.com/brl/mutter.git
synced 2024-11-22 16:10:41 -05:00
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
|
/*
|
||
|
|
* Clutter.
|
||
|
|
*
|
||
|
|
* An OpenGL based 'interactive canvas' library.
|
||
|
|
*
|
||
|
|
* Authored By Matthew Allum <mallum@openedhand.com>
|
||
|
|
*
|
||
|
|
* Copyright (C) 2006 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_CLUTTER_FIXED_H
|
||
|
|
#define _HAVE_CLUTTER_FIXED_H
|
||
|
|
|
||
|
|
#include <glib.h>
|
||
|
|
|
||
|
|
G_BEGIN_DECLS
|
||
|
|
|
||
|
|
typedef gint32 ClutterFixed;
|
||
|
|
|
||
|
|
#define CFX_Q 16 /* Decimal part size in bits */
|
||
|
|
#define CFX_ONE (1 << CFX_Q) /* 1 */
|
||
|
|
#define CFX_MAX 0x7fffffff
|
||
|
|
#define CFX_MIN 0x80000000
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_TO_FLOAT(x) ((float)((x)/65536.0))
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_TO_DOUBLE(x) ((double)((x)/65536.0))
|
||
|
|
|
||
|
|
#define CLUTTER_FLOAT_TO_FIXED(x) \
|
||
|
|
( (ABS(x) > 32767.0) ? \
|
||
|
|
(((x)/(x))*0x7fffffff) \
|
||
|
|
: ((long)((x) * 65536.0 + ((x) < 0 ? -0.5 : 0.5))) )
|
||
|
|
|
||
|
|
#define CLUTTER_INT_TO_FIXED(x) ((x) << CFX_Q)
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_INT(x) ((x) >> CFX_Q)
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_FRACTION(x) ((x) & ((1 << CFX_Q) - 1))
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_FLOOR(x) \
|
||
|
|
(((x) >= 0) ? ((x) >> CFX_Q) : ~((~(x)) >> CFX_Q))
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_CEIL(x) CLUTTER_FIXED_FLOOR(x + 0xffff)
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_MUL(x,y) ((x) >> 8) * ((y) >> 8)
|
||
|
|
|
||
|
|
#define CLUTTER_FIXED_DIV(x,y) ((((x) << 8)/(y)) << 8)
|
||
|
|
|
||
|
|
G_END_DECLS
|
||
|
|
|
||
|
|
#endif
|