michael@0: 
michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #include "SkPathEffect.h"
michael@0: #include "SkPath.h"
michael@0: #include "SkReadBuffer.h"
michael@0: #include "SkWriteBuffer.h"
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: void SkPathEffect::computeFastBounds(SkRect* dst, const SkRect& src) const {
michael@0:     *dst = src;
michael@0: }
michael@0: 
michael@0: bool SkPathEffect::asPoints(PointData* results, const SkPath& src,
michael@0:                     const SkStrokeRec&, const SkMatrix&, const SkRect*) const {
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1)
michael@0:         : fPE0(pe0), fPE1(pe1) {
michael@0:     SkASSERT(pe0);
michael@0:     SkASSERT(pe1);
michael@0:     fPE0->ref();
michael@0:     fPE1->ref();
michael@0: }
michael@0: 
michael@0: SkPairPathEffect::~SkPairPathEffect() {
michael@0:     SkSafeUnref(fPE0);
michael@0:     SkSafeUnref(fPE1);
michael@0: }
michael@0: 
michael@0: /*
michael@0:     Format: [oe0-factory][pe1-factory][pe0-size][pe0-data][pe1-data]
michael@0: */
michael@0: void SkPairPathEffect::flatten(SkWriteBuffer& buffer) const {
michael@0:     this->INHERITED::flatten(buffer);
michael@0:     buffer.writeFlattenable(fPE0);
michael@0:     buffer.writeFlattenable(fPE1);
michael@0: }
michael@0: 
michael@0: SkPairPathEffect::SkPairPathEffect(SkReadBuffer& buffer) {
michael@0:     fPE0 = buffer.readPathEffect();
michael@0:     fPE1 = buffer.readPathEffect();
michael@0:     // either of these may fail, so we have to check for nulls later on
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: bool SkComposePathEffect::filterPath(SkPath* dst, const SkPath& src,
michael@0:                              SkStrokeRec* rec, const SkRect* cullRect) const {
michael@0:     // we may have failed to unflatten these, so we have to check
michael@0:     if (!fPE0 || !fPE1) {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     SkPath          tmp;
michael@0:     const SkPath*   ptr = &src;
michael@0: 
michael@0:     if (fPE1->filterPath(&tmp, src, rec, cullRect)) {
michael@0:         ptr = &tmp;
michael@0:     }
michael@0:     return fPE0->filterPath(dst, *ptr, rec, cullRect);
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: bool SkSumPathEffect::filterPath(SkPath* dst, const SkPath& src,
michael@0:                              SkStrokeRec* rec, const SkRect* cullRect) const {
michael@0:     // use bit-or so that we always call both, even if the first one succeeds
michael@0:     return fPE0->filterPath(dst, src, rec, cullRect) |
michael@0:            fPE1->filterPath(dst, src, rec, cullRect);
michael@0: }