Alien-FreeImage

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src/Source/LibJXR/jxrgluelib/JXRGluePFC.c  view on Meta::CPAN

//================================================================
#define HLF_MIN 0.00006103515625f
#define HLF_MAX 65504.0f

#define HLF_MIN_BITS 0x0400
#define HLF_MAX_BITS 0x7bff

#define HLF_MIN_BITS_NEG (HLF_MIN_BITS | 0x8000)
#define HLF_MAX_BITS_NEG (HLF_MAX_BITS | 0x8000)

#define HLF_QNaN_BITZS 0x7fff

// simple and slow implementation of half <-> float conversion
static U32 Convert_Half_To_Float(U16 u16)
{
    // 1s5e10m -> 1s8e23m
    const U32 s = (u16 >> 15) & 0x0001;
    const U32 e = (u16 >> 10) & 0x001f;
    const U32 m = (u16 >>  0) & 0x03ff;

    if (0 == e) // 0, denorm

src/Source/OpenEXR/Half/halfLimits.h  view on Meta::CPAN

    static const int radix = HALF_RADIX;
    static half epsilon () throw () {return HALF_EPSILON;}
    static half round_error () throw () {return HALF_EPSILON / 2;}

    static const int min_exponent = HALF_MIN_EXP;
    static const int min_exponent10 = HALF_MIN_10_EXP;
    static const int max_exponent = HALF_MAX_EXP;
    static const int max_exponent10 = HALF_MAX_10_EXP;

    static const bool has_infinity = true;
    static const bool has_quiet_NaN = true;
    static const bool has_signaling_NaN = true;
    static const float_denorm_style has_denorm = denorm_present;
    static const bool has_denorm_loss = false;
    static half infinity () throw () {return half::posInf();}
    static half quiet_NaN () throw () {return half::qNan();}
    static half signaling_NaN () throw () {return half::sNan();}
    static half denorm_min () throw () {return HALF_MIN;}

    static const bool is_iec559 = false;
    static const bool is_bounded = false;
    static const bool is_modulo = false;

    static const bool traps = true;
    static const bool tinyness_before = false;
    static const float_round_style round_style = round_to_nearest;
};

src/Source/OpenEXR/IexMath/IexMathFloatExc.h  view on Meta::CPAN

    }

    ~MathExcOn ()
    {
	if (_changed)
	    mathExcOn (_saved);
    }

    // It is possible for functions to set the exception registers
    // yet not trigger a SIGFPE.  Specifically, the implementation
    // of pow(x, y) we're using can generates a NaN from a negative x
    // and fractional y but a SIGFPE is not generated.
    // This function examimes the exception registers and calls the
    // fpHandler if those registers modulo the exception mask are set.
    // It should be called wherever this class is commonly used where it has
    // been found that certain floating point exceptions are not being thrown.

    void handleOutstandingExceptions();

  private:

src/Source/OpenEXR/IlmImf/ImfB44Compressor.cpp  view on Meta::CPAN

//
//	    means that r[8] is the difference between t[5] and t[6].
//
//	 - optionally, a 4-by-4 pixel block where all pixels have the
//	   same value can be treated as a special case, where the
//	   compressed block contains only 3 instead of 14 bytes:
//	   t[0], followed by an "impossible" 6-bit shift value and
//	   two padding bits.
//
//	This compressor can handle positive and negative pixel values.
//	NaNs and infinities are replaced with zeroes before compression.
//
//-----------------------------------------------------------------------------

#include "ImfB44Compressor.h"
#include "ImfHeader.h"
#include "ImfChannelList.h"
#include "ImfMisc.h"
#include "ImfCheckedArithmetic.h"
#include <ImathFun.h>
#include <ImathBox.h>

src/Source/OpenEXR/IlmImf/ImfRational.cpp  view on Meta::CPAN

    {
	sign = 1;	// positive
    }
    else if (x < 0)
    {
	sign = -1;	// negative
	x = -x;
    }
    else
    {
	n = 0;		// NaN
	d = 0;
	return;
    }

    if (x >= (1U << 31) - 0.5)
    {
	n = sign;	// infinity
	d = 0;
	return;
    }

src/Source/OpenEXR/IlmImf/ImfRational.h  view on Meta::CPAN

//-----------------------------------------------------------------------------
//
//	Rational numbers
//
//	A rational number is represented as pair of integers, n and d.
//	The value of of the rational number is
// 
//		n/d			for d > 0
//		positive infinity	for n > 0, d == 0
//		negative infinity	for n < 0, d == 0
//		not a number (NaN)	for n == 0, d == 0
//
//-----------------------------------------------------------------------------

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER


class IMF_EXPORT Rational
{
  public:

src/Source/OpenEXR/IlmImf/dwaLookups.cpp  view on Meta::CPAN

{
    unsigned short toLinear[65536];

    toLinear[0] = 0;

    for (int i=1; i<65536; ++i) {
        half  h;
        float sign    = 1;
        float logBase = pow(2.7182818, 2.2);

        // map  NaN and inf to 0
        if ((i & 0x7c00) == 0x7c00) {
            toLinear[i]    = 0;
            continue;
        }

        //
        // _toLinear - assume i is NATIVE, but our output needs
        //             to get flipped to XDR
        //
        h.setBits(i);

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