46
|
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 |
|