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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 
computeFastBounds(SkRect * dst,const SkRect & src) const16 void SkPathEffect::computeFastBounds(SkRect* dst, const SkRect& src) const {
17     *dst = src;
18 }
19 
asPoints(PointData * results,const SkPath & src,const SkStrokeRec &,const SkMatrix &,const SkRect *) const20 bool SkPathEffect::asPoints(PointData* results, const SkPath& src,
21                     const SkStrokeRec&, const SkMatrix&, const SkRect*) const {
22     return false;
23 }
24 
asADash(DashInfo * info) const25 SkPathEffect::DashType SkPathEffect::asADash(DashInfo* info) const {
26     return kNone_DashType;
27 }
28 
29 ///////////////////////////////////////////////////////////////////////////////
30 
SkPairPathEffect(SkPathEffect * pe0,SkPathEffect * pe1)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 
~SkPairPathEffect()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 */
flatten(SkWriteBuffer & buffer) const47 void SkPairPathEffect::flatten(SkWriteBuffer& buffer) const {
48     buffer.writeFlattenable(fPE0);
49     buffer.writeFlattenable(fPE1);
50 }
51 
52 #ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
SkPairPathEffect(SkReadBuffer & buffer)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 #endif
59 
60 ///////////////////////////////////////////////////////////////////////////////
61 
CreateProc(SkReadBuffer & buffer)62 SkFlattenable* SkComposePathEffect::CreateProc(SkReadBuffer& buffer) {
63     SkAutoTUnref<SkPathEffect> pe0(buffer.readPathEffect());
64     SkAutoTUnref<SkPathEffect> pe1(buffer.readPathEffect());
65     return SkComposePathEffect::Create(pe0, pe1);
66 }
67 
filterPath(SkPath * dst,const SkPath & src,SkStrokeRec * rec,const SkRect * cullRect) const68 bool SkComposePathEffect::filterPath(SkPath* dst, const SkPath& src,
69                              SkStrokeRec* rec, const SkRect* cullRect) const {
70     // we may have failed to unflatten these, so we have to check
71     if (!fPE0 || !fPE1) {
72         return false;
73     }
74 
75     SkPath          tmp;
76     const SkPath*   ptr = &src;
77 
78     if (fPE1->filterPath(&tmp, src, rec, cullRect)) {
79         ptr = &tmp;
80     }
81     return fPE0->filterPath(dst, *ptr, rec, cullRect);
82 }
83 
84 ///////////////////////////////////////////////////////////////////////////////
85 
CreateProc(SkReadBuffer & buffer)86 SkFlattenable* SkSumPathEffect::CreateProc(SkReadBuffer& buffer) {
87     SkAutoTUnref<SkPathEffect> pe0(buffer.readPathEffect());
88     SkAutoTUnref<SkPathEffect> pe1(buffer.readPathEffect());
89     return SkSumPathEffect::Create(pe0, pe1);
90 }
91 
filterPath(SkPath * dst,const SkPath & src,SkStrokeRec * rec,const SkRect * cullRect) const92 bool SkSumPathEffect::filterPath(SkPath* dst, const SkPath& src,
93                              SkStrokeRec* rec, const SkRect* cullRect) const {
94     // use bit-or so that we always call both, even if the first one succeeds
95     return fPE0->filterPath(dst, src, rec, cullRect) |
96            fPE1->filterPath(dst, src, rec, cullRect);
97 }
98