1 /* 2 * Copyright 2006 The Android Open Source Project 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 9 #include "SkAntiRun.h" 10 #include "SkUtils.h" 11 12 void SkAlphaRuns::reset(int width) { 13 SkASSERT(width > 0); 14 15 #ifdef SK_DEBUG 16 sk_memset16((uint16_t*)fRuns, (uint16_t)(-42), width); 17 #endif 18 fRuns[0] = SkToS16(width); 19 fRuns[width] = 0; 20 fAlpha[0] = 0; 21 22 SkDEBUGCODE(fWidth = width;) 23 SkDEBUGCODE(this->validate();) 24 } 25 26 #ifdef SK_DEBUG 27 void SkAlphaRuns::assertValid(int y, int maxStep) const { 28 int max = (y + 1) * maxStep - (y == maxStep - 1); 29 30 const int16_t* runs = fRuns; 31 const uint8_t* alpha = fAlpha; 32 33 while (*runs) { 34 SkASSERT(*alpha <= max); 35 alpha += *runs; 36 runs += *runs; 37 } 38 } 39 40 void SkAlphaRuns::dump() const { 41 const int16_t* runs = fRuns; 42 const uint8_t* alpha = fAlpha; 43 44 SkDebugf("Runs"); 45 while (*runs) { 46 int n = *runs; 47 48 SkDebugf(" %02x", *alpha); 49 if (n > 1) { 50 SkDebugf(",%d", n); 51 } 52 alpha += n; 53 runs += n; 54 } 55 SkDebugf("\n"); 56 } 57 58 void SkAlphaRuns::validate() const { 59 SkASSERT(fWidth > 0); 60 61 int count = 0; 62 const int16_t* runs = fRuns; 63 64 while (*runs) { 65 SkASSERT(*runs > 0); 66 count += *runs; 67 SkASSERT(count <= fWidth); 68 runs += *runs; 69 } 70 SkASSERT(count == fWidth); 71 } 72 #endif 73
