Archive more dead code.

src/core/SkMath.cpp

 /*
  * 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.
  */
 
 #include "SkMathPriv.h"
 #include "SkFloatBits.h"
 #include "SkFloatingPoint.h"
@@ skipping 156 matching lines @@
         if (SkScalarNearlyZero(*cosValue)) {
             *cosValue = 0;
         }
     }
 
     if (SkScalarNearlyZero(sinValue)) {
         sinValue = 0;
     }
     return sinValue;
 }
-
-#define INTERP_SINTABLE
-#define BUILD_TABLE_AT_RUNTIMEx
-
-#define kTableSize  256
-
-#ifdef BUILD_TABLE_AT_RUNTIME
-    static uint16_t gSkSinTable[kTableSize];
-
-    static void build_sintable(uint16_t table[]) {
-        for (int i = 0; i < kTableSize; i++) {
-            double  rad = i * 3.141592653589793 / (2*kTableSize);
-            double  val = sin(rad);
-            int     ival = (int)(val * SK_Fixed1);
-            table[i] = SkToU16(ival);
-        }
-    }
-#else
-    #include "SkSinTable.h"
-#endif
-
-#define SK_Fract1024SizeOver2PI     0x28BE60    /* floatToFract(1024 / 2PI) */
-
-#ifdef INTERP_SINTABLE
-static SkFixed interp_table(const uint16_t table[], int index, int partial255) {
-    SkASSERT((unsigned)index < kTableSize);
-    SkASSERT((unsigned)partial255 <= 255);
-
-    SkFixed lower = table[index];
-    SkFixed upper = (index == kTableSize - 1) ? SK_Fixed1 : table[index + 1];
-
-    SkASSERT(lower < upper);
-    SkASSERT(lower >= 0);
-    SkASSERT(upper <= SK_Fixed1);
-
-    partial255 += (partial255 >> 7);
-    return lower + ((upper - lower) * partial255 >> 8);
-}
-#endif
-
-SkFixed SkFixedSinCos(SkFixed radians, SkFixed* cosValuePtr) {
-    SkASSERT(SK_ARRAY_COUNT(gSkSinTable) == kTableSize);
-
-#ifdef BUILD_TABLE_AT_RUNTIME
-    static bool gFirstTime = true;
-    if (gFirstTime) {
-        build_sintable(gSinTable);
-        gFirstTime = false;
-    }
-#endif
-
-    // make radians positive
-    SkFixed sinValue, cosValue;
-    int32_t cosSign = 0;
-    int32_t sinSign = SkExtractSign(radians);
-    radians = SkApplySign(radians, sinSign);
-    // scale it to 0...1023 ...
-
-#ifdef INTERP_SINTABLE
-    radians = SkMulDiv(radians, 2 * kTableSize * 256, SK_FixedPI);
-    int findex = radians & (kTableSize * 256 - 1);
-    int index = findex >> 8;
-    int partial = findex & 255;
-    sinValue = interp_table(gSkSinTable, index, partial);
-
-    findex = kTableSize * 256 - findex - 1;
-    index = findex >> 8;
-    partial = findex & 255;
-    cosValue = interp_table(gSkSinTable, index, partial);
-
-    int quad = ((unsigned)radians / (kTableSize * 256)) & 3;
-#else
-    radians = SkMulDiv(radians, 2 * kTableSize, SK_FixedPI);
-    int     index = radians & (kTableSize - 1);
-
-    if (index == 0) {
-        sinValue = 0;
-        cosValue = SK_Fixed1;
-    } else {
-        sinValue = gSkSinTable[index];
-        cosValue = gSkSinTable[kTableSize - index];
-    }
-    int quad = ((unsigned)radians / kTableSize) & 3;
-#endif
-
-    if (quad & 1) {
-        SkTSwap<SkFixed>(sinValue, cosValue);
-    }
-    if (quad & 2) {
-        sinSign = ~sinSign;
-    }
-    if (((quad - 1) & 2) == 0) {
-        cosSign = ~cosSign;
-    }
-
-    // restore the sign for negative angles
-    sinValue = SkApplySign(sinValue, sinSign);
-    cosValue = SkApplySign(cosValue, cosSign);
-
-#ifdef SK_DEBUG
-    if (1) {
-        SkFixed sin2 = SkFixedMul(sinValue, sinValue);
-        SkFixed cos2 = SkFixedMul(cosValue, cosValue);
-        int diff = cos2 + sin2 - SK_Fixed1;
-        SkASSERT(SkAbs32(diff) <= 7);
-    }
-#endif
-
-    if (cosValuePtr) {
-        *cosValuePtr = cosValue;
-    }
-    return sinValue;
-}