| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkAntiRun.h" |
| #include "SkUtils.h" |
| |
| void SkAlphaRuns::reset(int width) { |
| SkASSERT(width > 0); |
| |
| #ifdef SK_DEBUG |
| sk_memset16((uint16_t*)fRuns, (uint16_t)(-42), width); |
| #endif |
| fRuns[0] = SkToS16(width); |
| fRuns[width] = 0; |
| fAlpha[0] = 0; |
| |
| SkDEBUGCODE(fWidth = width;) |
| SkDEBUGCODE(this->validate();) |
| } |
| |
| #ifdef SK_DEBUG |
| void SkAlphaRuns::assertValid(int y, int maxStep) const { |
| int max = (y + 1) * maxStep - (y == maxStep - 1); |
| |
| const int16_t* runs = fRuns; |
| const uint8_t* alpha = fAlpha; |
| |
| while (*runs) { |
| SkASSERT(*alpha <= max); |
| alpha += *runs; |
| runs += *runs; |
| } |
| } |
| |
| void SkAlphaRuns::dump() const { |
| const int16_t* runs = fRuns; |
| const uint8_t* alpha = fAlpha; |
| |
| SkDebugf("Runs"); |
| while (*runs) { |
| int n = *runs; |
| |
| SkDebugf(" %02x", *alpha); |
| if (n > 1) { |
| SkDebugf(",%d", n); |
| } |
| alpha += n; |
| runs += n; |
| } |
| SkDebugf("\n"); |
| } |
| |
| void SkAlphaRuns::validate() const { |
| SkASSERT(fWidth > 0); |
| |
| int count = 0; |
| const int16_t* runs = fRuns; |
| |
| while (*runs) { |
| SkASSERT(*runs > 0); |
| count += *runs; |
| SkASSERT(count <= fWidth); |
| runs += *runs; |
| } |
| SkASSERT(count == fWidth); |
| } |
| #endif |