зеркало из https://github.com/mozilla/gecko-dev.git
77 строки
3.5 KiB
C
77 строки
3.5 KiB
C
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsUnitConversion_h__
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#define nsUnitConversion_h__
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#include "nscore.h"
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#include <math.h>
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/// Unit conversion macros
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//@{
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#define TWIPS_CONST 20
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#define TWIPS_CONST_FLOAT 20.0f
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#define NS_POINTS_TO_TWIPS_INT(x) ((PRInt32)(TWIPS_CONST * (x)))
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#define NS_TWIPS_TO_POINTS_INT(x) ((PRInt32)((x) / TWIPS_CONST))
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#define NS_POINTS_TO_TWIPS_FLOAT(x) (TWIPS_CONST_FLOAT * (x))
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#define NS_TWIPS_TO_POINTS_FLOAT(x) ((x) / TWIPS_CONST_FLOAT)
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#define NS_INCHES_TO_TWIPS(x) (72.0f * TWIPS_CONST_FLOAT * (x)) // 72 points per inch
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#define NS_FEET_TO_TWIPS(x) (72.0f * 12.0f * TWIPS_CONST_FLOAT * (x))
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#define NS_MILES_TO_TWIPS(x) (72.0f * 12.0f * 5280.0f * TWIPS_CONST_FLOAT * (x))
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#define NS_MILLIMETERS_TO_TWIPS(x) (72.0f * 0.03937f * TWIPS_CONST_FLOAT * (x))
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#define NS_CENTIMETERS_TO_TWIPS(x) (72.0f * 0.3937f * TWIPS_CONST_FLOAT * (x))
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#define NS_METERS_TO_TWIPS(x) (72.0f * 39.37f * TWIPS_CONST_FLOAT * (x))
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#define NS_KILOMETERS_TO_TWIPS(x) (72.0f * 39370.0f * TWIPS_CONST_FLOAT * (x))
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#define NS_PICAS_TO_TWIPS(x) (12.0f * TWIPS_CONST_FLOAT * (x)) // 12 points per pica
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#define NS_DIDOTS_TO_TWIPS(x) ((16.0f / 15.0f) * TWIPS_CONST_FLOAT * (x)) // 15 didots per 16 points
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#define NS_CICEROS_TO_TWIPS(x) ((12.0f * 16.0f / 15.0f) * TWIPS_CONST_FLOAT * (x)) // 12 didots per cicero
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#define NS_TWIPS_TO_INCHES(x) ((1.0f / (72.0f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_FEET(x) ((1.0f / (72.0f * 12.0f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_MILES(x) ((1.0f / (72.0f * 12.0f * 5280.0f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_MILLIMETERS(x) ((1.0f / (72.0f * 0.03937f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_CENTIMETERS(x) ((1.0f / (72.0f * 0.3937f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_METERS(x) ((1.0f / (72.0f * 39.37f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_KILOMETERS(x) ((1.0f / (72.0f * 39370.0f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_PICAS(x) ((1.0f / (12.0f * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_DIDOTS(x) ((1.0f / ((16.0f / 15.0f) * TWIPS_CONST_FLOAT)) * (x))
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#define NS_TWIPS_TO_CICEROS(x) ((1.0f / ((12.0f * 16.0f / 15.0f) * TWIPS_CONST_FLOAT)) * (x))
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//@}
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/// use these for all of your rounding needs...
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//@{
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#define NS_TO_INT_FLOOR(x) ((PRInt32)floor(x))
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#define NS_TO_INT_CEIL(x) ((PRInt32)ceil(x))
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#define NS_TO_INT_ROUND(x) ((PRInt32)floor((x) + 0.5))
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#define NS_TO_INT_ROUND_EXCLUSIVE(x) ((PRInt32)floor((x) + 0.4999999999999999))
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//@}
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#define NS_INT_PIXELS_TO_TWIPS(pixels, factor) ((((float)pixels)*factor) + 0.4999999999999999)
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#define NS_FLOAT_PIXELS_TO_TWIPS(pixels, factor) ((pixels*factor) + 0.4999999999999999)
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#endif
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