The Tor Browser: gfx/skia/trunk/include/core/SkScalar.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkScalar.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkScalar.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2006 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 SkScalar_DEFINED
 #define SkScalar_DEFINED
 #include "SkFixed.h"
 #include "SkFloatingPoint.h"
 //#define SK_SUPPORT_DEPRECATED_SCALARROUND
 typedef float   SkScalar;
 /** SK_Scalar1 is defined to be 1.0 represented as an SkScalar
 */
 #define SK_Scalar1              (1.0f)
 /** SK_Scalar1 is defined to be 1/2 represented as an SkScalar
 */
 #define SK_ScalarHalf           (0.5f)
 /** SK_ScalarInfinity is defined to be infinity as an SkScalar
 */
 #define SK_ScalarInfinity       SK_FloatInfinity
 /** SK_ScalarNegativeInfinity is defined to be negative infinity as an SkScalar
 */
 #define SK_ScalarNegativeInfinity       SK_FloatNegativeInfinity
 /** SK_ScalarMax is defined to be the largest value representable as an SkScalar
 */
 #define SK_ScalarMax            (3.402823466e+38f)
 /** SK_ScalarMin is defined to be the smallest value representable as an SkScalar
 */
 #define SK_ScalarMin            (-SK_ScalarMax)
 /** SK_ScalarNaN is defined to be 'Not a Number' as an SkScalar
 */
 #define SK_ScalarNaN            SK_FloatNaN
 /** SkScalarIsNaN(n) returns true if argument is not a number
 */
 static inline bool SkScalarIsNaN(float x) { return x != x; }
 /** Returns true if x is not NaN and not infinite */
 static inline bool SkScalarIsFinite(float x) {
     // We rely on the following behavior of infinities and nans
     // 0 * finite --> 0
     // 0 * infinity --> NaN
     // 0 * NaN --> NaN
     float prod = x * 0;
     // At this point, prod will either be NaN or 0
     // Therefore we can return (prod == prod) or (0 == prod).
     return prod == prod;
 }
 /** SkIntToScalar(n) returns its integer argument as an SkScalar
 */
 #define SkIntToScalar(n)        ((float)(n))
 /** SkFixedToScalar(n) returns its SkFixed argument as an SkScalar
 */
 #define SkFixedToScalar(x)      SkFixedToFloat(x)
 /** SkScalarToFixed(n) returns its SkScalar argument as an SkFixed
 */
 #define SkScalarToFixed(x)      SkFloatToFixed(x)
 #define SkScalarToFloat(n)      (n)
 #ifndef SK_SCALAR_TO_FLOAT_EXCLUDED
 #define SkFloatToScalar(n)      (n)
 #endif
 #define SkScalarToDouble(n)      (double)(n)
 #define SkDoubleToScalar(n)      (float)(n)
 /** SkScalarFraction(x) returns the signed fractional part of the argument
 */
 #define SkScalarFraction(x)     sk_float_mod(x, 1.0f)
 #define SkScalarFloorToScalar(x)    sk_float_floor(x)
 #define SkScalarCeilToScalar(x)     sk_float_ceil(x)
 #define SkScalarRoundToScalar(x)    sk_float_floor((x) + 0.5f)
 #define SkScalarFloorToInt(x)       sk_float_floor2int(x)
 #define SkScalarCeilToInt(x)        sk_float_ceil2int(x)
 #define SkScalarRoundToInt(x)       sk_float_round2int(x)
 #define SkScalarTruncToInt(x)       static_cast<int>(x)
 /** Returns the absolute value of the specified SkScalar
 */
 #define SkScalarAbs(x)          sk_float_abs(x)
 /** Return x with the sign of y
  */
 #define SkScalarCopySign(x, y)  sk_float_copysign(x, y)
 /** Returns the value pinned between 0 and max inclusive
 */
 inline SkScalar SkScalarClampMax(SkScalar x, SkScalar max) {
     return x < 0 ? 0 : x > max ? max : x;
 }
 /** Returns the value pinned between min and max inclusive
 */
 inline SkScalar SkScalarPin(SkScalar x, SkScalar min, SkScalar max) {
     return x < min ? min : x > max ? max : x;
 }
 /** Returns the specified SkScalar squared (x*x)
 */
 inline SkScalar SkScalarSquare(SkScalar x) { return x * x; }
 /** Returns the product of two SkScalars
 */
 #define SkScalarMul(a, b)       ((float)(a) * (b))
 /** Returns the product of two SkScalars plus a third SkScalar
 */
 #define SkScalarMulAdd(a, b, c) ((float)(a) * (b) + (c))
 /** Returns the quotient of two SkScalars (a/b)
 */
 #define SkScalarDiv(a, b)       ((float)(a) / (b))
 /** Returns the mod of two SkScalars (a mod b)
 */
 #define SkScalarMod(x,y)        sk_float_mod(x,y)
 /** Returns the product of the first two arguments, divided by the third argument
 */
 #define SkScalarMulDiv(a, b, c) ((float)(a) * (b) / (c))
 /** Returns the multiplicative inverse of the SkScalar (1/x)
 */
 #define SkScalarInvert(x)       (SK_Scalar1 / (x))
 #define SkScalarFastInvert(x)   (SK_Scalar1 / (x))
 /** Returns the square root of the SkScalar
 */
 #define SkScalarSqrt(x)         sk_float_sqrt(x)
 /** Returns b to the e
 */
 #define SkScalarPow(b, e)       sk_float_pow(b, e)
 /** Returns the average of two SkScalars (a+b)/2
 */
 #define SkScalarAve(a, b)       (((a) + (b)) * 0.5f)
 /** Returns one half of the specified SkScalar
 */
 #define SkScalarHalf(a)         ((a) * 0.5f)
 #define SK_ScalarSqrt2          1.41421356f
 #define SK_ScalarPI             3.14159265f
 #define SK_ScalarTanPIOver8     0.414213562f
 #define SK_ScalarRoot2Over2     0.707106781f
 #define SkDegreesToRadians(degrees) ((degrees) * (SK_ScalarPI / 180))
 #define SkRadiansToDegrees(radians) ((radians) * (180 / SK_ScalarPI))
 float SkScalarSinCos(SkScalar radians, SkScalar* cosValue);
 #define SkScalarSin(radians)    (float)sk_float_sin(radians)
 #define SkScalarCos(radians)    (float)sk_float_cos(radians)
 #define SkScalarTan(radians)    (float)sk_float_tan(radians)
 #define SkScalarASin(val)   (float)sk_float_asin(val)
 #define SkScalarACos(val)   (float)sk_float_acos(val)
 #define SkScalarATan2(y, x) (float)sk_float_atan2(y,x)
 #define SkScalarExp(x)  (float)sk_float_exp(x)
 #define SkScalarLog(x)  (float)sk_float_log(x)
 inline SkScalar SkMaxScalar(SkScalar a, SkScalar b) { return a > b ? a : b; }
 inline SkScalar SkMinScalar(SkScalar a, SkScalar b) { return a < b ? a : b; }
 static inline bool SkScalarIsInt(SkScalar x) {
     return x == (float)(int)x;
 }
 // DEPRECATED : use ToInt or ToScalar variant
 #ifdef SK_SUPPORT_DEPRECATED_SCALARROUND
 #   define SkScalarFloor(x)    SkScalarFloorToInt(x)
 #   define SkScalarCeil(x)     SkScalarCeilToInt(x)
 #   define SkScalarRound(x)    SkScalarRoundToInt(x)
 #endif
 /**
  *  Returns -1 || 0 || 1 depending on the sign of value:
  *  -1 if x < 0
  *   0 if x == 0
  *   1 if x > 0
  */
 static inline int SkScalarSignAsInt(SkScalar x) {
     return x < 0 ? -1 : (x > 0);
 }
 // Scalar result version of above
 static inline SkScalar SkScalarSignAsScalar(SkScalar x) {
     return x < 0 ? -SK_Scalar1 : ((x > 0) ? SK_Scalar1 : 0);
 }
 #define SK_ScalarNearlyZero         (SK_Scalar1 / (1 << 12))
 static inline bool SkScalarNearlyZero(SkScalar x,
                                     SkScalar tolerance = SK_ScalarNearlyZero) {
     SkASSERT(tolerance >= 0);
     return SkScalarAbs(x) <= tolerance;
 }
 static inline bool SkScalarNearlyEqual(SkScalar x, SkScalar y,
                                      SkScalar tolerance = SK_ScalarNearlyZero) {
     SkASSERT(tolerance >= 0);
     return SkScalarAbs(x-y) <= tolerance;
 }
 /** Linearly interpolate between A and B, based on t.
     If t is 0, return A
     If t is 1, return B
     else interpolate.
     t must be [0..SK_Scalar1]
 */
 static inline SkScalar SkScalarInterp(SkScalar A, SkScalar B, SkScalar t) {
     SkASSERT(t >= 0 && t <= SK_Scalar1);
     return A + (B - A) * t;
 }
 /** Interpolate along the function described by (keys[length], values[length])
     for the passed searchKey.  SearchKeys outside the range keys[0]-keys[Length]
     clamp to the min or max value.  This function was inspired by a desire
     to change the multiplier for thickness in fakeBold; therefore it assumes
     the number of pairs (length) will be small, and a linear search is used.
     Repeated keys are allowed for discontinuous functions (so long as keys is
     monotonically increasing), and if key is the value of a repeated scalar in
     keys, the first one will be used.  However, that may change if a binary
     search is used.
 */
 SkScalar SkScalarInterpFunc(SkScalar searchKey, const SkScalar keys[],
                             const SkScalar values[], int length);
 /*
  *  Helper to compare an array of scalars.
  */
 static inline bool SkScalarsEqual(const SkScalar a[], const SkScalar b[], int n) {
     SkASSERT(n >= 0);
     for (int i = 0; i < n; ++i) {
         if (a[i] != b[i]) {
             return false;
         }
     }
     return true;
 }
 #endif

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gfx/skia/trunk/include/core/SkScalar.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkScalar.h