diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/include/core/SkFixed.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/include/core/SkFixed.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,164 @@
+/*
+ * 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 SkFixed_DEFINED
+#define SkFixed_DEFINED
+
+#include "SkTypes.h"
+
+/** \file SkFixed.h
+
+    Types and macros for 16.16 fixed point
+*/
+
+/** 32 bit signed integer used to represent fractions values with 16 bits to the right of the decimal point
+*/
+typedef int32_t             SkFixed;
+#define SK_Fixed1           (1 << 16)
+#define SK_FixedHalf        (1 << 15)
+#define SK_FixedMax         (0x7FFFFFFF)
+#define SK_FixedMin         (-SK_FixedMax)
+#define SK_FixedNaN         ((int) 0x80000000)
+#define SK_FixedPI          (0x3243F)
+#define SK_FixedSqrt2       (92682)
+#define SK_FixedTanPIOver8  (0x6A0A)
+#define SK_FixedRoot2Over2  (0xB505)
+
+#define SkFixedToFloat(x)   ((x) * 1.5258789e-5f)
+#if 1
+    #define SkFloatToFixed(x)   ((SkFixed)((x) * SK_Fixed1))
+#else
+    // pins over/under flows to max/min int32 (slower than just a cast)
+    static inline SkFixed SkFloatToFixed(float x) {
+        int64_t n = x * SK_Fixed1;
+        return (SkFixed)n;
+    }
+#endif
+
+#ifdef SK_DEBUG
+    static inline SkFixed SkFloatToFixed_Check(float x) {
+        int64_t n64 = (int64_t)(x * SK_Fixed1);
+        SkFixed n32 = (SkFixed)n64;
+        SkASSERT(n64 == n32);
+        return n32;
+    }
+#else
+    #define SkFloatToFixed_Check(x) SkFloatToFixed(x)
+#endif
+
+#define SkFixedToDouble(x)  ((x) * 1.5258789e-5)
+#define SkDoubleToFixed(x)  ((SkFixed)((x) * SK_Fixed1))
+
+/** Converts an integer to a SkFixed, asserting that the result does not overflow
+    a 32 bit signed integer
+*/
+#ifdef SK_DEBUG
+    inline SkFixed SkIntToFixed(int n)
+    {
+        SkASSERT(n >= -32768 && n <= 32767);
+        return n << 16;
+    }
+#else
+    //  force the cast to SkFixed to ensure that the answer is signed (like the debug version)
+    #define SkIntToFixed(n)     (SkFixed)((n) << 16)
+#endif
+
+#define SkFixedRoundToInt(x)    (((x) + SK_FixedHalf) >> 16)
+#define SkFixedCeilToInt(x)     (((x) + SK_Fixed1 - 1) >> 16)
+#define SkFixedFloorToInt(x)    ((x) >> 16)
+
+#define SkFixedRoundToFixed(x)  (((x) + SK_FixedHalf) & 0xFFFF0000)
+#define SkFixedCeilToFixed(x)   (((x) + SK_Fixed1 - 1) & 0xFFFF0000)
+#define SkFixedFloorToFixed(x)  ((x) & 0xFFFF0000)
+
+#define SkFixedAbs(x)       SkAbs32(x)
+#define SkFixedAve(a, b)    (((a) + (b)) >> 1)
+
+SkFixed SkFixedMul_portable(SkFixed, SkFixed);
+
+#define SkFixedDiv(numer, denom)    SkDivBits(numer, denom, 16)
+
+///////////////////////////////////////////////////////////////////////////////
+// TODO: move fixed sin/cos into SkCosineMapper, as that is the only caller
+//       or rewrite SkCosineMapper to not use it at all
+
+SkFixed SkFixedSinCos(SkFixed radians, SkFixed* cosValueOrNull);
+#define SkFixedSin(radians)         SkFixedSinCos(radians, NULL)
+static inline SkFixed SkFixedCos(SkFixed radians) {
+    SkFixed cosValue;
+    (void)SkFixedSinCos(radians, &cosValue);
+    return cosValue;
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////////////////
+// Now look for ASM overrides for our portable versions (should consider putting this in its own file)
+
+#ifdef SkLONGLONG
+    inline SkFixed SkFixedMul_longlong(SkFixed a, SkFixed b)
+    {
+        return (SkFixed)((int64_t)a * b >> 16);
+    }
+    #define SkFixedMul(a,b)     SkFixedMul_longlong(a,b)
+#endif
+
+#if defined(SK_CPU_ARM)
+    /* This guy does not handle NaN or other obscurities, but is faster than
+       than (int)(x*65536)
+    */
+    inline SkFixed SkFloatToFixed_arm(float x)
+    {
+        int32_t y, z;
+        asm("movs    %1, %3, lsl #1         \n"
+            "mov     %2, #0x8E              \n"
+            "sub     %1, %2, %1, lsr #24    \n"
+            "mov     %2, %3, lsl #8         \n"
+            "orr     %2, %2, #0x80000000    \n"
+            "mov     %1, %2, lsr %1         \n"
+            "it cs                          \n"
+            "rsbcs   %1, %1, #0             \n"
+            : "=r"(x), "=&r"(y), "=&r"(z)
+            : "r"(x)
+            : "cc"
+            );
+        return y;
+    }
+    inline SkFixed SkFixedMul_arm(SkFixed x, SkFixed y)
+    {
+        int32_t t;
+        asm("smull  %0, %2, %1, %3          \n"
+            "mov    %0, %0, lsr #16         \n"
+            "orr    %0, %0, %2, lsl #16     \n"
+            : "=r"(x), "=&r"(y), "=r"(t)
+            : "r"(x), "1"(y)
+            :
+            );
+        return x;
+    }
+    #undef SkFixedMul
+    #define SkFixedMul(x, y)        SkFixedMul_arm(x, y)
+
+    #undef SkFloatToFixed
+    #define SkFloatToFixed(x)  SkFloatToFixed_arm(x)
+#endif
+
+#ifndef SkFixedMul
+    #define SkFixedMul(x, y)    SkFixedMul_portable(x, y)
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+
+typedef int64_t SkFixed48;
+
+#define SkIntToFixed48(x)       ((SkFixed48)(x) << 48)
+#define SkFixed48ToInt(x)       ((int)((x) >> 48))
+#define SkFixedToFixed48(x)     ((SkFixed48)(x) << 32)
+#define SkFixed48ToFixed(x)     ((SkFixed)((x) >> 32))
+#define SkFloatToFixed48(x)     ((SkFixed48)((x) * (65536.0f * 65536.0f * 65536.0f)))
+
+#define SkScalarToFixed48(x)    SkFloatToFixed48(x)
+
+#endif