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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkScalar_DEFINED | 8 #ifndef SkScalar_DEFINED |
9 #define SkScalar_DEFINED | 9 #define SkScalar_DEFINED |
10 | 10 |
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217 | 217 |
218 #define SK_ScalarNearlyZero (SK_Scalar1 / (1 << 12)) | 218 #define SK_ScalarNearlyZero (SK_Scalar1 / (1 << 12)) |
219 | 219 |
220 static inline bool SkScalarNearlyZero(SkScalar x, | 220 static inline bool SkScalarNearlyZero(SkScalar x, |
221 SkScalar tolerance = SK_ScalarNearlyZero) { | 221 SkScalar tolerance = SK_ScalarNearlyZero) { |
222 SkASSERT(tolerance >= 0); | 222 SkASSERT(tolerance >= 0); |
223 return SkScalarAbs(x) <= tolerance; | 223 return SkScalarAbs(x) <= tolerance; |
224 } | 224 } |
225 | 225 |
226 static inline bool SkScalarNearlyEqual(SkScalar x, SkScalar y, | 226 static inline bool SkScalarNearlyEqual(SkScalar x, SkScalar y, |
227 SkScalar tolerance = SK_ScalarNearlyZero) { | 227 SkScalar tolerance = SK_ScalarNearlyZero)
{ |
228 SkASSERT(tolerance >= 0); | 228 SkASSERT(tolerance >= 0); |
229 return SkScalarAbs(x-y) <= tolerance; | 229 return SkScalarAbs(x-y) <= tolerance; |
230 } | 230 } |
231 | 231 |
232 /** Linearly interpolate between A and B, based on t. | 232 /** Linearly interpolate between A and B, based on t. |
233 If t is 0, return A | 233 If t is 0, return A |
234 If t is 1, return B | 234 If t is 1, return B |
235 else interpolate. | 235 else interpolate. |
236 t must be [0..SK_Scalar1] | 236 t must be [0..SK_Scalar1] |
237 */ | 237 */ |
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260 SkASSERT(n >= 0); | 260 SkASSERT(n >= 0); |
261 for (int i = 0; i < n; ++i) { | 261 for (int i = 0; i < n; ++i) { |
262 if (a[i] != b[i]) { | 262 if (a[i] != b[i]) { |
263 return false; | 263 return false; |
264 } | 264 } |
265 } | 265 } |
266 return true; | 266 return true; |
267 } | 267 } |
268 | 268 |
269 #endif | 269 #endif |
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