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Side by Side Diff: src/core/SkAntiRun.h

Issue 2471133002: Set analytic AA as default. (Closed)
Patch Set: Add parsedpaths to expected failure Created 4 years, 1 month ago
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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 8
9 #ifndef SkAntiRun_DEFINED 9 #ifndef SkAntiRun_DEFINED
10 #define SkAntiRun_DEFINED 10 #define SkAntiRun_DEFINED
11 11
12 #include "SkBlitter.h" 12 #include "SkBlitter.h"
13 13
14 /** Sparse array of run-length-encoded alpha (supersampling coverage) values. 14 /** Sparse array of run-length-encoded alpha (supersampling coverage) values.
15 Sparseness allows us to independently compose several paths into the 15 Sparseness allows us to independently compose several paths into the
16 same SkAlphaRuns buffer. 16 same SkAlphaRuns buffer.
17 */ 17 */
18 18
19 class SkAlphaRuns { 19 class SkAlphaRuns {
20 public: 20 public:
21 int16_t* fRuns; 21 int16_t* fRuns;
22 uint8_t* fAlpha; 22 uint8_t* fAlpha;
23 23
24 // Return 0-255 given 0-256 24 // Return 0-255 given 0-256
25 static inline SkAlpha CatchOverflow(int alpha) { 25 static inline SkAlpha CatchOverflow(int alpha) {
26 SkASSERT(alpha >= 0 && alpha <= 256);
26 return alpha - (alpha >> 8); 27 return alpha - (alpha >> 8);
27 } 28 }
28 29
29 /// Returns true if the scanline contains only a single run, 30 /// Returns true if the scanline contains only a single run,
30 /// of alpha value 0. 31 /// of alpha value 0.
31 bool empty() const { 32 bool empty() const {
32 SkASSERT(fRuns[0] > 0); 33 SkASSERT(fRuns[0] > 0);
33 return fAlpha[0] == 0 && fRuns[fRuns[0]] == 0; 34 return fAlpha[0] == 0 && fRuns[fRuns[0]] == 0;
34 } 35 }
35 36
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186 x -= n; 187 x -= n;
187 } 188 }
188 } 189 }
189 190
190 private: 191 private:
191 SkDEBUGCODE(int fWidth;) 192 SkDEBUGCODE(int fWidth;)
192 SkDEBUGCODE(void validate() const;) 193 SkDEBUGCODE(void validate() const;)
193 }; 194 };
194 195
195 #endif 196 #endif
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