1 /*

     2 * Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  NVG Decoder header file

    15 *

    16 */

    17 

    18 #ifndef NVGFLOATFIX_H_

    19 #define NVGFLOATFIX_H_

    20 

    21 #include <e32def.h>

    22 #include <s32mem.h>

    23 

    24 const TInt32 KFixPtFrac = 16;

    25 const TInt32 KFixPtFracVal = (1 << KFixPtFrac);

    26 #   define svgFloatBits(f) (*(int*)&f)

    27 

    28 inline int svgScalarFromFloat(float f)

    29     {

    30     int a;

    31     int sign;

    32     int exponent;

    33     

    34     int r;

    35     

    36     

    37     a           = svgFloatBits(f);

    38     sign        = a >> 31;

    39     exponent    = (127 + 15) - ((a >> 23) & 0xff);

    40     

    41     r = (int)((((int)(a) << 8) | (1U << 31)) >> exponent);

    42     r &= ((exponent - 32) >> 31);

    43     

    44     r = (r ^ sign) - sign;

    45     

    46     return r;

    47     

    48     }

    49 class TFloatFixPt

    50     {

    51     public:

    52         

    53         /**

    54          * Construct a TFixPt.  The default value is 0.0.

    55          *

    56          * @since 1.0

    57          * @return

    58          */

    59         TFloatFixPt();

    60 

    61         /**

    62          * Construct a TFixPt from the given integer value.

    63          *

    64          * @since 1.0

    65          * @param aVal : integer value

    66          * @return

    67          */

    68         TFloatFixPt(TInt aVal);

    69         TFloatFixPt(TInt32 aVal);

    70         TFloatFixPt(TReal32 aVal);

    71         TFloatFixPt(TInt aVal, TBool aBool);

    72         TFloatFixPt&   operator=(TReal32 aVal);

    73         TFloatFixPt           operator+(const TFloatFixPt& aVal) const;

    74         operator TReal32() const;

    75         TInt32           Round();

    76         TInt32           RawData();

    77         void copyfloatfix(TInt aVal);

    78     public:

    79         TInt                    iValue;    // Must be the first data member of this class!

    80         

    81     };

    82 

    83 #endif

    84