Revert[3] "move some public headers into private"

include/private/SkFloatBits.h

-
-/*
- * Copyright 2008 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkFloatBits_DEFINED
-#define SkFloatBits_DEFINED
-
-#include "SkTypes.h"
-
-/** Convert a sign-bit int (i.e. float interpreted as int) into a 2s compliement
-    int. This also converts -0 (0x80000000) to 0. Doing this to a float allows
-    it to be compared using normal C operators (<, <=, etc.)
-*/
-static inline int32_t SkSignBitTo2sCompliment(int32_t x) {
-    if (x < 0) {
-        x &= 0x7FFFFFFF;
-        x = -x;
-    }
-    return x;
-}
-
-/** Convert a 2s compliment int to a sign-bit (i.e. int interpreted as float).
-    This undoes the result of SkSignBitTo2sCompliment().
- */
-static inline int32_t Sk2sComplimentToSignBit(int32_t x) {
-    int sign = x >> 31;
-    // make x positive
-    x = (x ^ sign) - sign;
-    // set the sign bit as needed
-    x |= sign << 31;
-    return x;
-}
-
-/** Given the bit representation of a float, return its value cast to an int.
-    If the value is out of range, or NaN, return return +/- SK_MaxS32
-*/
-int32_t SkFloatBits_toIntCast(int32_t floatBits);
-
-/** Given the bit representation of a float, return its floor as an int.
-    If the value is out of range, or NaN, return return +/- SK_MaxS32
- */
-SK_API int32_t SkFloatBits_toIntFloor(int32_t floatBits);
-
-/** Given the bit representation of a float, return it rounded to an int.
-    If the value is out of range, or NaN, return return +/- SK_MaxS32
- */
-SK_API int32_t SkFloatBits_toIntRound(int32_t floatBits);
-
-/** Given the bit representation of a float, return its ceiling as an int.
-    If the value is out of range, or NaN, return return +/- SK_MaxS32
- */
-SK_API int32_t SkFloatBits_toIntCeil(int32_t floatBits);
-
-
-union SkFloatIntUnion {
-    float   fFloat;
-    int32_t fSignBitInt;
-};
-
-// Helper to see a float as its bit pattern (w/o aliasing warnings)
-static inline int32_t SkFloat2Bits(float x) {
-    SkFloatIntUnion data;
-    data.fFloat = x;
-    return data.fSignBitInt;
-}
-
-// Helper to see a bit pattern as a float (w/o aliasing warnings)
-static inline float SkBits2Float(int32_t floatAsBits) {
-    SkFloatIntUnion data;
-    data.fSignBitInt = floatAsBits;
-    return data.fFloat;
-}
-
-/** Return the float as a 2s compliment int. Just to be used to compare floats
-    to each other or against positive float-bit-constants (like 0). This does
-    not return the int equivalent of the float, just something cheaper for
-    compares-only.
- */
-static inline int32_t SkFloatAs2sCompliment(float x) {
-    return SkSignBitTo2sCompliment(SkFloat2Bits(x));
-}
-
-/** Return the 2s compliment int as a float. This undos the result of
-    SkFloatAs2sCompliment
- */
-static inline float Sk2sComplimentAsFloat(int32_t x) {
-    return SkBits2Float(Sk2sComplimentToSignBit(x));
-}
-
-/** Return x cast to a float (i.e. (float)x)
-*/
-float SkIntToFloatCast(int x);
-
-/** Return the float cast to an int.
-    If the value is out of range, or NaN, return +/- SK_MaxS32
-*/
-static inline int32_t SkFloatToIntCast(float x) {
-    return SkFloatBits_toIntCast(SkFloat2Bits(x));
-}
-
-/** Return the floor of the float as an int.
-    If the value is out of range, or NaN, return +/- SK_MaxS32
-*/
-static inline int32_t SkFloatToIntFloor(float x) {
-    return SkFloatBits_toIntFloor(SkFloat2Bits(x));
-}
-
-/** Return the float rounded to an int.
-    If the value is out of range, or NaN, return +/- SK_MaxS32
-*/
-static inline int32_t SkFloatToIntRound(float x) {
-    return SkFloatBits_toIntRound(SkFloat2Bits(x));
-}
-
-/** Return the ceiling of the float as an int.
-    If the value is out of range, or NaN, return +/- SK_MaxS32
-*/
-static inline int32_t SkFloatToIntCeil(float x) {
-    return SkFloatBits_toIntCeil(SkFloat2Bits(x));
-}
-
-//  Scalar wrappers for float-bit routines
-
-#define SkScalarAs2sCompliment(x)    SkFloatAs2sCompliment(x)
-#define Sk2sComplimentAsScalar(x)    Sk2sComplimentAsFloat(x)
-
-#endif