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
16void SkPathEffect::computeFastBounds(SkRect* dst, const SkRect& src) const {
17    *dst = src;
18}
19
20bool SkPathEffect::asPoints(PointData* results, const SkPath& src,
21                    const SkStrokeRec&, const SkMatrix&, const SkRect*) const {
22    return false;
23}
24
25SkPathEffect::DashType SkPathEffect::asADash(DashInfo* info) const {
26    return kNone_DashType;
27}
28
29///////////////////////////////////////////////////////////////////////////////
30
31SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1)
32        : fPE0(pe0), fPE1(pe1) {
33    SkASSERT(pe0);
34    SkASSERT(pe1);
35    fPE0->ref();
36    fPE1->ref();
37}
38
39SkPairPathEffect::~SkPairPathEffect() {
40    SkSafeUnref(fPE0);
41    SkSafeUnref(fPE1);
42}
43
44/*
45    Format: [oe0-factory][pe1-factory][pe0-size][pe0-data][pe1-data]
46*/
47void SkPairPathEffect::flatten(SkWriteBuffer& buffer) const {
48    this->INHERITED::flatten(buffer);
49    buffer.writeFlattenable(fPE0);
50    buffer.writeFlattenable(fPE1);
51}
52
53SkPairPathEffect::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
61bool 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
79bool 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