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- /*
- * 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 "include/private/SkTo.h"
- #include "src/core/SkAntiRun.h"
- #include "src/core/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
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