1 2 /* 3 * Copyright 2006 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #include "SkPathEffect.h" 10 #include "SkPath.h" 11 #include "SkReadBuffer.h" 12 #include "SkWriteBuffer.h" 13 14 /////////////////////////////////////////////////////////////////////////////// 15 16 void SkPathEffect::computeFastBounds(SkRect* dst, const SkRect& src) const { 17 *dst = src; 18 } 19 20 bool SkPathEffect::asPoints(PointData* results, const SkPath& src, 21 const SkStrokeRec&, const SkMatrix&, const SkRect*) const { 22 return false; 23 } 24 25 SkPathEffect::DashType SkPathEffect::asADash(DashInfo* info) const { 26 return kNone_DashType; 27 } 28 29 /////////////////////////////////////////////////////////////////////////////// 30 31 SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1) 32 : fPE0(pe0), fPE1(pe1) { 33 SkASSERT(pe0); 34 SkASSERT(pe1); 35 fPE0->ref(); 36 fPE1->ref(); 37 } 38 39 SkPairPathEffect::~SkPairPathEffect() { 40 SkSafeUnref(fPE0); 41 SkSafeUnref(fPE1); 42 } 43 44 /* 45 Format: [oe0-factory][pe1-factory][pe0-size][pe0-data][pe1-data] 46 */ 47 void SkPairPathEffect::flatten(SkWriteBuffer& buffer) const { 48 this->INHERITED::flatten(buffer); 49 buffer.writeFlattenable(fPE0); 50 buffer.writeFlattenable(fPE1); 51 } 52 53 SkPairPathEffect::SkPairPathEffect(SkReadBuffer& buffer) { 54 fPE0 = buffer.readPathEffect(); 55 fPE1 = buffer.readPathEffect(); 56 // either of these may fail, so we have to check for nulls later on 57 } 58 59 /////////////////////////////////////////////////////////////////////////////// 60 61 bool SkComposePathEffect::filterPath(SkPath* dst, const SkPath& src, 62 SkStrokeRec* rec, const SkRect* cullRect) const { 63 // we may have failed to unflatten these, so we have to check 64 if (!fPE0 || !fPE1) { 65 return false; 66 } 67 68 SkPath tmp; 69 const SkPath* ptr = &src; 70 71 if (fPE1->filterPath(&tmp, src, rec, cullRect)) { 72 ptr = &tmp; 73 } 74 return fPE0->filterPath(dst, *ptr, rec, cullRect); 75 } 76 77 /////////////////////////////////////////////////////////////////////////////// 78 79 bool SkSumPathEffect::filterPath(SkPath* dst, const SkPath& src, 80 SkStrokeRec* rec, const SkRect* cullRect) const { 81 // use bit-or so that we always call both, even if the first one succeeds 82 return fPE0->filterPath(dst, src, rec, cullRect) | 83 fPE1->filterPath(dst, src, rec, cullRect); 84 } 85