| OLD | NEW |
| 1 | 1 |
| 2 /* | 2 /* |
| 3 * Copyright 2010 The Android Open Source Project | 3 * Copyright 2010 The Android Open Source Project |
| 4 * | 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
| 7 */ | 7 */ |
| 8 | 8 |
| 9 | 9 |
| 10 #include "SkMath.h" | 10 #include "SkMath.h" |
| 11 #include "SkScalar.h" | 11 #include "SkScalar.h" |
| 12 | 12 |
| 13 SkScalar SkScalarInterpFunc(SkScalar searchKey, const SkScalar keys[], | 13 SkScalar SkScalarInterpFunc(SkScalar searchKey, const SkScalar keys[], |
| 14 const SkScalar values[], int length) { | 14 const SkScalar values[], int length) { |
| 15 SkASSERT(length > 0); | 15 SkASSERT(length > 0); |
| 16 SkASSERT(keys != NULL); | 16 SkASSERT(keys != nullptr); |
| 17 SkASSERT(values != NULL); | 17 SkASSERT(values != nullptr); |
| 18 #ifdef SK_DEBUG | 18 #ifdef SK_DEBUG |
| 19 for (int i = 1; i < length; i++) | 19 for (int i = 1; i < length; i++) |
| 20 SkASSERT(keys[i] >= keys[i-1]); | 20 SkASSERT(keys[i] >= keys[i-1]); |
| 21 #endif | 21 #endif |
| 22 int right = 0; | 22 int right = 0; |
| 23 while (right < length && searchKey > keys[right]) | 23 while (right < length && searchKey > keys[right]) |
| 24 right++; | 24 right++; |
| 25 // Could use sentinel values to eliminate conditionals, but since the | 25 // Could use sentinel values to eliminate conditionals, but since the |
| 26 // tables are taken as input, a simpler format is better. | 26 // tables are taken as input, a simpler format is better. |
| 27 if (length == right) | 27 if (length == right) |
| 28 return values[length-1]; | 28 return values[length-1]; |
| 29 if (0 == right) | 29 if (0 == right) |
| 30 return values[0]; | 30 return values[0]; |
| 31 // Otherwise, interpolate between right - 1 and right. | 31 // Otherwise, interpolate between right - 1 and right. |
| 32 SkScalar rightKey = keys[right]; | 32 SkScalar rightKey = keys[right]; |
| 33 SkScalar leftKey = keys[right-1]; | 33 SkScalar leftKey = keys[right-1]; |
| 34 SkScalar fract = (searchKey - leftKey) / (rightKey - leftKey); | 34 SkScalar fract = (searchKey - leftKey) / (rightKey - leftKey); |
| 35 return SkScalarInterp(values[right-1], values[right], fract); | 35 return SkScalarInterp(values[right-1], values[right], fract); |
| 36 } | 36 } |
| OLD | NEW |