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Leaked source code of windows server 2003
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windows-server-2003/multimedia/directx/dxg/d3d/dx6/d3dutil/d3dflt.cpp

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//----------------------------------------------------------------------------
//
// d3dflt.cpp
//
// Supporting data and routines for general FP header.
//
// Copyright (C) Microsoft Corporation, 1997.
//
//----------------------------------------------------------------------------
#include "pch.cpp"
#pragma hdrstop
#ifdef _X86_
FLOAT g_fE = FLOAT_E;
FLOAT g_fZero = 0.0f;
FLOAT g_fNearZero = FLOAT_NEARZERO;
FLOAT g_fHalf = 0.5f;
FLOAT g_fp95 = 0.95f;
FLOAT g_fOne = 1.0f;
FLOAT g_fOneMinusEps = 1.0f - FLT_EPSILON;
FLOAT g_fExpScale = FLOAT_EXPSCALE;
FLOAT g_fOoExpScale = (FLOAT)(1.0 / (double)FLOAT_EXPSCALE);
FLOAT g_f255oTwoPow15 = (FLOAT)(255.0 / (double)CONST_TWOPOW15);
FLOAT g_fOo255 = (FLOAT)(1.0 / 255.0);
FLOAT g_fOo256 = (FLOAT)(1.0 / 256.0);
FLOAT g_fTwoPow7 = FLOAT_TWOPOW7;
FLOAT g_fTwoPow8 = FLOAT_TWOPOW8;
FLOAT g_fTwoPow11 = FLOAT_TWOPOW11;
FLOAT g_fTwoPow15 = FLOAT_TWOPOW15;
FLOAT g_fOoTwoPow15 = (FLOAT)(1.0 / (double)CONST_TWOPOW15);
FLOAT g_fTwoPow16 = FLOAT_TWOPOW16;
FLOAT g_fOoTwoPow16 = (FLOAT)(1.0 / (double)CONST_TWOPOW16);
FLOAT g_fTwoPow20 = FLOAT_TWOPOW20;
FLOAT g_fOoTwoPow20 = (FLOAT)(1.0 / (double)CONST_TWOPOW20);
FLOAT g_fTwoPow27 = FLOAT_TWOPOW27;
FLOAT g_fOoTwoPow27 = (FLOAT)(1.0 / (double)CONST_TWOPOW27);
FLOAT g_fTwoPow30 = FLOAT_TWOPOW30;
FLOAT g_fTwoPow31 = FLOAT_TWOPOW31;
FLOAT g_fNearTwoPow31 = FLOAT_NEARTWOPOW31;
FLOAT g_fOoTwoPow31 = (FLOAT)(1.0 / (double)CONST_TWOPOW31);
FLOAT g_fOoNearTwoPow31 = (FLOAT)(1.0 / (double)FLOAT_NEARTWOPOW31);
FLOAT g_fTwoPow32 = FLOAT_TWOPOW32;
FLOAT g_fNearTwoPow32 = FLOAT_NEARTWOPOW32;
FLOAT g_fTwoPow39 = FLOAT_TWOPOW39;
FLOAT g_fTwoPow47 = FLOAT_TWOPOW47;
#endif // _X86_
FLOAT g_fUInt8ToFloat[257] =
{
0.0f,
(FLOAT)(1.0 / 255.0),
(FLOAT)(2.0 / 255.0),
(FLOAT)(3.0 / 255.0),
(FLOAT)(4.0 / 255.0),
(FLOAT)(5.0 / 255.0),
(FLOAT)(6.0 / 255.0),
(FLOAT)(7.0 / 255.0),
(FLOAT)(8.0 / 255.0),
(FLOAT)(9.0 / 255.0),
(FLOAT)(10.0 / 255.0),
(FLOAT)(11.0 / 255.0),
(FLOAT)(12.0 / 255.0),
(FLOAT)(13.0 / 255.0),
(FLOAT)(14.0 / 255.0),
(FLOAT)(15.0 / 255.0),
(FLOAT)(16.0 / 255.0),
(FLOAT)(17.0 / 255.0),
(FLOAT)(18.0 / 255.0),
(FLOAT)(19.0 / 255.0),
(FLOAT)(20.0 / 255.0),
(FLOAT)(21.0 / 255.0),
(FLOAT)(22.0 / 255.0),
(FLOAT)(23.0 / 255.0),
(FLOAT)(24.0 / 255.0),
(FLOAT)(25.0 / 255.0),
(FLOAT)(26.0 / 255.0),
(FLOAT)(27.0 / 255.0),
(FLOAT)(28.0 / 255.0),
(FLOAT)(29.0 / 255.0),
(FLOAT)(30.0 / 255.0),
(FLOAT)(31.0 / 255.0),
(FLOAT)(32.0 / 255.0),
(FLOAT)(33.0 / 255.0),
(FLOAT)(34.0 / 255.0),
(FLOAT)(35.0 / 255.0),
(FLOAT)(36.0 / 255.0),
(FLOAT)(37.0 / 255.0),
(FLOAT)(38.0 / 255.0),
(FLOAT)(39.0 / 255.0),
(FLOAT)(40.0 / 255.0),
(FLOAT)(41.0 / 255.0),
(FLOAT)(42.0 / 255.0),
(FLOAT)(43.0 / 255.0),
(FLOAT)(44.0 / 255.0),
(FLOAT)(45.0 / 255.0),
(FLOAT)(46.0 / 255.0),
(FLOAT)(47.0 / 255.0),
(FLOAT)(48.0 / 255.0),
(FLOAT)(49.0 / 255.0),
(FLOAT)(50.0 / 255.0),
(FLOAT)(51.0 / 255.0),
(FLOAT)(52.0 / 255.0),
(FLOAT)(53.0 / 255.0),
(FLOAT)(54.0 / 255.0),
(FLOAT)(55.0 / 255.0),
(FLOAT)(56.0 / 255.0),
(FLOAT)(57.0 / 255.0),
(FLOAT)(58.0 / 255.0),
(FLOAT)(59.0 / 255.0),
(FLOAT)(60.0 / 255.0),
(FLOAT)(61.0 / 255.0),
(FLOAT)(62.0 / 255.0),
(FLOAT)(63.0 / 255.0),
(FLOAT)(64.0 / 255.0),
(FLOAT)(65.0 / 255.0),
(FLOAT)(66.0 / 255.0),
(FLOAT)(67.0 / 255.0),
(FLOAT)(68.0 / 255.0),
(FLOAT)(69.0 / 255.0),
(FLOAT)(70.0 / 255.0),
(FLOAT)(71.0 / 255.0),
(FLOAT)(72.0 / 255.0),
(FLOAT)(73.0 / 255.0),
(FLOAT)(74.0 / 255.0),
(FLOAT)(75.0 / 255.0),
(FLOAT)(76.0 / 255.0),
(FLOAT)(77.0 / 255.0),
(FLOAT)(78.0 / 255.0),
(FLOAT)(79.0 / 255.0),
(FLOAT)(80.0 / 255.0),
(FLOAT)(81.0 / 255.0),
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(FLOAT)(90.0 / 255.0),
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(FLOAT)(94.0 / 255.0),
(FLOAT)(95.0 / 255.0),
(FLOAT)(96.0 / 255.0),
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(FLOAT)(100.0 / 255.0),
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(FLOAT)(105.0 / 255.0),
(FLOAT)(106.0 / 255.0),
(FLOAT)(107.0 / 255.0),
(FLOAT)(108.0 / 255.0),
(FLOAT)(109.0 / 255.0),
(FLOAT)(110.0 / 255.0),
(FLOAT)(111.0 / 255.0),
(FLOAT)(112.0 / 255.0),
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(FLOAT)(145.0 / 255.0),
(FLOAT)(146.0 / 255.0),
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(FLOAT)(148.0 / 255.0),
(FLOAT)(149.0 / 255.0),
(FLOAT)(150.0 / 255.0),
(FLOAT)(151.0 / 255.0),
(FLOAT)(152.0 / 255.0),
(FLOAT)(153.0 / 255.0),
(FLOAT)(154.0 / 255.0),
(FLOAT)(155.0 / 255.0),
(FLOAT)(156.0 / 255.0),
(FLOAT)(157.0 / 255.0),
(FLOAT)(158.0 / 255.0),
(FLOAT)(159.0 / 255.0),
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(FLOAT)(181.0 / 255.0),
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(FLOAT)(183.0 / 255.0),
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(FLOAT)(186.0 / 255.0),
(FLOAT)(187.0 / 255.0),
(FLOAT)(188.0 / 255.0),
(FLOAT)(189.0 / 255.0),
(FLOAT)(190.0 / 255.0),
(FLOAT)(191.0 / 255.0),
(FLOAT)(192.0 / 255.0),
(FLOAT)(193.0 / 255.0),
(FLOAT)(194.0 / 255.0),
(FLOAT)(195.0 / 255.0),
(FLOAT)(196.0 / 255.0),
(FLOAT)(197.0 / 255.0),
(FLOAT)(198.0 / 255.0),
(FLOAT)(199.0 / 255.0),
(FLOAT)(200.0 / 255.0),
(FLOAT)(201.0 / 255.0),
(FLOAT)(202.0 / 255.0),
(FLOAT)(203.0 / 255.0),
(FLOAT)(204.0 / 255.0),
(FLOAT)(205.0 / 255.0),
(FLOAT)(206.0 / 255.0),
(FLOAT)(207.0 / 255.0),
(FLOAT)(208.0 / 255.0),
(FLOAT)(209.0 / 255.0),
(FLOAT)(210.0 / 255.0),
(FLOAT)(211.0 / 255.0),
(FLOAT)(212.0 / 255.0),
(FLOAT)(213.0 / 255.0),
(FLOAT)(214.0 / 255.0),
(FLOAT)(215.0 / 255.0),
(FLOAT)(216.0 / 255.0),
(FLOAT)(217.0 / 255.0),
(FLOAT)(218.0 / 255.0),
(FLOAT)(219.0 / 255.0),
(FLOAT)(220.0 / 255.0),
(FLOAT)(221.0 / 255.0),
(FLOAT)(222.0 / 255.0),
(FLOAT)(223.0 / 255.0),
(FLOAT)(224.0 / 255.0),
(FLOAT)(225.0 / 255.0),
(FLOAT)(226.0 / 255.0),
(FLOAT)(227.0 / 255.0),
(FLOAT)(228.0 / 255.0),
(FLOAT)(229.0 / 255.0),
(FLOAT)(230.0 / 255.0),
(FLOAT)(231.0 / 255.0),
(FLOAT)(232.0 / 255.0),
(FLOAT)(233.0 / 255.0),
(FLOAT)(234.0 / 255.0),
(FLOAT)(235.0 / 255.0),
(FLOAT)(236.0 / 255.0),
(FLOAT)(237.0 / 255.0),
(FLOAT)(238.0 / 255.0),
(FLOAT)(239.0 / 255.0),
(FLOAT)(240.0 / 255.0),
(FLOAT)(241.0 / 255.0),
(FLOAT)(242.0 / 255.0),
(FLOAT)(243.0 / 255.0),
(FLOAT)(244.0 / 255.0),
(FLOAT)(245.0 / 255.0),
(FLOAT)(246.0 / 255.0),
(FLOAT)(247.0 / 255.0),
(FLOAT)(248.0 / 255.0),
(FLOAT)(249.0 / 255.0),
(FLOAT)(250.0 / 255.0),
(FLOAT)(251.0 / 255.0),
(FLOAT)(252.0 / 255.0),
(FLOAT)(253.0 / 255.0),
(FLOAT)(254.0 / 255.0),
1.0f,
// Extra entry to allow for overflow.
1.0f,
};
DOUBLE g_dSnap[33] =
{
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW52,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW51,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW50,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW49,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW48,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW47,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW46,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW45,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW44,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW43,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW42,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW41,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW40,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW39,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW38,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW37,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW36,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW35,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW34,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW33,
(DOUBLE)CONST_TWOPOW32 + (DOUBLE)CONST_TWOPOW31,
(DOUBLE)CONST_TWOPOW31 + (DOUBLE)CONST_TWOPOW30,
(DOUBLE)CONST_TWOPOW30 + (DOUBLE)CONST_TWOPOW29,
(DOUBLE)CONST_TWOPOW29 + (DOUBLE)CONST_TWOPOW28,
(DOUBLE)CONST_TWOPOW28 + (DOUBLE)CONST_TWOPOW27,
(DOUBLE)CONST_TWOPOW27 + (DOUBLE)CONST_TWOPOW26,
(DOUBLE)CONST_TWOPOW26 + (DOUBLE)CONST_TWOPOW25,
(DOUBLE)CONST_TWOPOW25 + (DOUBLE)CONST_TWOPOW24,
(DOUBLE)CONST_TWOPOW24 + (DOUBLE)CONST_TWOPOW23,
(DOUBLE)CONST_TWOPOW23 + (DOUBLE)CONST_TWOPOW22,
(DOUBLE)CONST_TWOPOW22 + (DOUBLE)CONST_TWOPOW21,
(DOUBLE)CONST_TWOPOW21 + (DOUBLE)CONST_TWOPOW20,
(DOUBLE)CONST_TWOPOW20 + (DOUBLE)CONST_TWOPOW19,
};