| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkPathTypes.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkTypes.h" |
| #include "include/private/base/SkDebug.h" |
| #include "src/base/SkMathPriv.h" |
| #include "src/core/SkPathPriv.h" |
| #include "tests/SubsetPath.h" |
| |
| SubsetPath::SubsetPath(const SkPath& path) |
| : fPath(path) |
| , fSubset(1) { |
| } |
| |
| int SubsetPath::range(int* end) const { |
| int leadingZero = SkCLZ(fSubset); |
| int parts = 1 << (31 - leadingZero); |
| int partIndex = fSubset - parts; |
| SkASSERT(partIndex >= 0); |
| int count = fSelected.size(); |
| int start = count * partIndex / parts; |
| *end = count * (partIndex + 1) / parts; |
| return start; |
| } |
| |
| bool SubsetPath::subset(bool testFailed, SkPath* sub) { |
| int start, end; |
| if (!testFailed) { |
| start = range(&end); |
| for (; start < end; ++start) { |
| fSelected[start] = true; |
| } |
| } |
| do { |
| do { |
| ++fSubset; |
| start = range(&end); |
| // SkDebugf("%d s=%d e=%d t=%d\n", fSubset, start, end, fTries); |
| if (end - start > 1) { |
| fTries = fSelected.size(); |
| } else if (end - start == 1) { |
| if (--fTries <= 0) { |
| return false; |
| } |
| } |
| } while (start == end); |
| } while (!fSelected[start]); |
| for (; start < end; ++start) { |
| fSelected[start] = false; |
| } |
| #if 1 |
| SkDebugf("selected: "); |
| for (int index = 0; index < fSelected.size(); ++index) { |
| SkDebugf("%c", fSelected[index] ? 'x' : '-'); |
| } |
| #endif |
| *sub = getSubsetPath(); |
| return true; |
| } |
| |
| SubsetContours::SubsetContours(const SkPath& path) |
| : SubsetPath(path) { |
| bool foundCurve = false; |
| int contourCount = 0; |
| for (auto [verb, pts, w] : SkPathPriv::Iterate(fPath)) { |
| switch (verb) { |
| case SkPathVerb::kMove: |
| break; |
| case SkPathVerb::kLine: |
| case SkPathVerb::kQuad: |
| case SkPathVerb::kConic: |
| case SkPathVerb::kCubic: |
| foundCurve = true; |
| break; |
| case SkPathVerb::kClose: |
| ++contourCount; |
| foundCurve = false; |
| break; |
| default: |
| SkDEBUGFAIL("bad verb"); |
| return; |
| } |
| } |
| contourCount += foundCurve; |
| for (int index = 0; index < contourCount; ++index) { |
| *fSelected.append() = true; |
| } |
| fTries = contourCount; |
| } |
| |
| SkPath SubsetContours::getSubsetPath() const { |
| SkPath result; |
| result.setFillType(fPath.getFillType()); |
| if (!fSelected.size()) { |
| return result; |
| } |
| int contourCount = 0; |
| bool enabled = fSelected[0]; |
| bool addMoveTo = true; |
| for (auto [verb, pts, w] : SkPathPriv::Iterate(fPath)) { |
| if (enabled && addMoveTo) { |
| result.moveTo(pts[0]); |
| addMoveTo = false; |
| } |
| switch (verb) { |
| case SkPathVerb::kMove: |
| break; |
| case SkPathVerb::kLine: |
| if (enabled) { |
| result.lineTo(pts[1]); |
| } |
| break; |
| case SkPathVerb::kQuad: |
| if (enabled) { |
| result.quadTo(pts[1], pts[2]); |
| } |
| break; |
| case SkPathVerb::kConic: |
| if (enabled) { |
| result.conicTo(pts[1], pts[2], *w); |
| } |
| break; |
| case SkPathVerb::kCubic: |
| if (enabled) { |
| result.cubicTo(pts[1], pts[2], pts[3]); |
| } |
| break; |
| case SkPathVerb::kClose: |
| if (enabled) { |
| result.close(); |
| } |
| if (++contourCount >= fSelected.size()) { |
| break; |
| } |
| enabled = fSelected[contourCount]; |
| addMoveTo = true; |
| continue; |
| default: |
| SkDEBUGFAIL("bad verb"); |
| return result; |
| } |
| } |
| return result; |
| } |
| |
| SubsetVerbs::SubsetVerbs(const SkPath& path) |
| : SubsetPath(path) { |
| int verbCount = 0; |
| for (auto [verb, pts, w] : SkPathPriv::Iterate(fPath)) { |
| switch (verb) { |
| case SkPathVerb::kMove: |
| break; |
| case SkPathVerb::kLine: |
| case SkPathVerb::kQuad: |
| case SkPathVerb::kConic: |
| case SkPathVerb::kCubic: |
| ++verbCount; |
| break; |
| case SkPathVerb::kClose: |
| break; |
| default: |
| SkDEBUGFAIL("bad verb"); |
| return; |
| } |
| } |
| for (int index = 0; index < verbCount; ++index) { |
| *fSelected.append() = true; |
| } |
| fTries = verbCount; |
| } |
| |
| SkPath SubsetVerbs::getSubsetPath() const { |
| SkPath result; |
| result.setFillType(fPath.getFillType()); |
| if (!fSelected.size()) { |
| return result; |
| } |
| int verbIndex = 0; |
| bool addMoveTo = true; |
| bool addLineTo = false; |
| for (auto [verb, pts, w] : SkPathPriv::Iterate(fPath)) { |
| bool enabled = SkPathVerb::kLine <= verb && verb <= SkPathVerb::kCubic |
| ? fSelected[verbIndex++] : false; |
| if (enabled) { |
| if (addMoveTo) { |
| result.moveTo(pts[0]); |
| addMoveTo = false; |
| } else if (addLineTo) { |
| result.lineTo(pts[0]); |
| addLineTo = false; |
| } |
| } |
| switch (verb) { |
| case SkPathVerb::kMove: |
| break; |
| case SkPathVerb::kLine: |
| if (enabled) { |
| result.lineTo(pts[1]); |
| } |
| break; |
| case SkPathVerb::kQuad: |
| if (enabled) { |
| result.quadTo(pts[1], pts[2]); |
| } |
| break; |
| case SkPathVerb::kConic: |
| if (enabled) { |
| result.conicTo(pts[1], pts[2], *w); |
| } |
| break; |
| case SkPathVerb::kCubic: |
| if (enabled) { |
| result.cubicTo(pts[1], pts[2], pts[3]); |
| } |
| break; |
| case SkPathVerb::kClose: |
| result.close(); |
| addMoveTo = true; |
| addLineTo = false; |
| continue; |
| default: |
| SkDEBUGFAIL("bad verb"); |
| return result; |
| } |
| addLineTo = !enabled; |
| } |
| return result; |
| } |