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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 SkGeometry_DEFINED | 8 #ifndef SkGeometry_DEFINED |
9 #define SkGeometry_DEFINED | 9 #define SkGeometry_DEFINED |
10 | 10 |
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214 * If tangent is not null, return its tangent at the t-value. NOTE the | 214 * If tangent is not null, return its tangent at the t-value. NOTE the |
215 * tangent value's length is arbitrary, and only its direction should | 215 * tangent value's length is arbitrary, and only its direction should |
216 * be used. | 216 * be used. |
217 */ | 217 */ |
218 void evalAt(SkScalar t, SkPoint* pos, SkVector* tangent = NULL) const; | 218 void evalAt(SkScalar t, SkPoint* pos, SkVector* tangent = NULL) const; |
219 void chopAt(SkScalar t, SkConic dst[2]) const; | 219 void chopAt(SkScalar t, SkConic dst[2]) const; |
220 void chop(SkConic dst[2]) const; | 220 void chop(SkConic dst[2]) const; |
221 | 221 |
222 SkPoint evalAt(SkScalar t) const; | 222 SkPoint evalAt(SkScalar t) const; |
223 SkVector evalTangentAt(SkScalar t) const; | 223 SkVector evalTangentAt(SkScalar t) const; |
224 void chop2(SkConic dst[2]) const; | |
225 | 224 |
226 void computeAsQuadError(SkVector* err) const; | 225 void computeAsQuadError(SkVector* err) const; |
227 bool asQuadTol(SkScalar tol) const; | 226 bool asQuadTol(SkScalar tol) const; |
228 | 227 |
229 /** | 228 /** |
230 * return the power-of-2 number of quads needed to approximate this conic | 229 * return the power-of-2 number of quads needed to approximate this conic |
231 * with a sequence of quads. Will be >= 0. | 230 * with a sequence of quads. Will be >= 0. |
232 */ | 231 */ |
233 int computeQuadPOW2(SkScalar tol) const; | 232 int computeQuadPOW2(SkScalar tol) const; |
234 | 233 |
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305 private: | 304 private: |
306 enum { | 305 enum { |
307 kQuadCount = 8, // should handle most conics | 306 kQuadCount = 8, // should handle most conics |
308 kPointCount = 1 + 2 * kQuadCount, | 307 kPointCount = 1 + 2 * kQuadCount, |
309 }; | 308 }; |
310 SkAutoSTMalloc<kPointCount, SkPoint> fStorage; | 309 SkAutoSTMalloc<kPointCount, SkPoint> fStorage; |
311 int fQuadCount; // #quads for current usage | 310 int fQuadCount; // #quads for current usage |
312 }; | 311 }; |
313 | 312 |
314 #endif | 313 #endif |
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