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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkPathEffect.h"
#include "SkPath.h"
#include "SkFlattenableBuffers.h"
#include "SkPaintDefaults.h"
// must be < 0, since ==0 means hairline, and >0 means normal stroke
#define kStrokeRec_FillStyleWidth (-SK_Scalar1)
SkStrokeRec::SkStrokeRec(InitStyle s) {
fWidth = (kFill_InitStyle == s) ? kStrokeRec_FillStyleWidth : 0;
fMiterLimit = SkPaintDefaults_MiterLimit;
fCap = SkPaint::kDefault_Cap;
fJoin = SkPaint::kDefault_Join;
fStrokeAndFill = false;
}
SkStrokeRec::SkStrokeRec(const SkStrokeRec& src) {
memcpy(this, &src, sizeof(src));
}
SkStrokeRec::SkStrokeRec(const SkPaint& paint) {
switch (paint.getStyle()) {
case SkPaint::kFill_Style:
fWidth = kStrokeRec_FillStyleWidth;
fStrokeAndFill = false;
break;
case SkPaint::kStroke_Style:
fWidth = paint.getStrokeWidth();
fStrokeAndFill = false;
break;
case SkPaint::kStrokeAndFill_Style:
if (0 == paint.getStrokeWidth()) {
// hairline+fill == fill
fWidth = kStrokeRec_FillStyleWidth;
fStrokeAndFill = false;
} else {
fWidth = paint.getStrokeWidth();
fStrokeAndFill = true;
}
break;
default:
SkASSERT(!"unknown paint style");
// fall back on just fill
fWidth = kStrokeRec_FillStyleWidth;
fStrokeAndFill = false;
break;
}
// copy these from the paint, regardless of our "style"
fMiterLimit = paint.getStrokeMiter();
fCap = paint.getStrokeCap();
fJoin = paint.getStrokeJoin();
}
SkStrokeRec::Style SkStrokeRec::getStyle() const {
if (fWidth < 0) {
return kFill_Style;
} else if (0 == fWidth) {
return kHairline_Style;
} else {
return fStrokeAndFill ? kStrokeAndFill_Style : kStroke_Style;
}
}
void SkStrokeRec::setFillStyle() {
fWidth = kStrokeRec_FillStyleWidth;
fStrokeAndFill = false;
}
void SkStrokeRec::setHairlineStyle() {
fWidth = 0;
fStrokeAndFill = false;
}
void SkStrokeRec::setStrokeStyle(SkScalar width, bool strokeAndFill) {
if (strokeAndFill && (0 == width)) {
// hairline+fill == fill
this->setFillStyle();
} else {
fWidth = width;
fStrokeAndFill = strokeAndFill;
}
}
#include "SkStroke.h"
bool SkStrokeRec::applyToPath(SkPath* dst, const SkPath& src) const {
if (fWidth <= 0) { // hairline or fill
return false;
}
SkStroke stroker;
stroker.setCap(fCap);
stroker.setJoin(fJoin);
stroker.setMiterLimit(fMiterLimit);
stroker.setWidth(fWidth);
stroker.setDoFill(fStrokeAndFill);
stroker.strokePath(src, dst);
return true;
}
///////////////////////////////////////////////////////////////////////////////
SK_DEFINE_INST_COUNT(SkPathEffect)
void SkPathEffect::computeFastBounds(SkRect* dst, const SkRect& src) {
*dst = src;
}
///////////////////////////////////////////////////////////////////////////////
SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1)
: fPE0(pe0), fPE1(pe1) {
SkASSERT(pe0);
SkASSERT(pe1);
fPE0->ref();
fPE1->ref();
}
SkPairPathEffect::~SkPairPathEffect() {
SkSafeUnref(fPE0);
SkSafeUnref(fPE1);
}
/*
Format: [oe0-factory][pe1-factory][pe0-size][pe0-data][pe1-data]
*/
void SkPairPathEffect::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeFlattenable(fPE0);
buffer.writeFlattenable(fPE1);
}
SkPairPathEffect::SkPairPathEffect(SkFlattenableReadBuffer& buffer) {
fPE0 = buffer.readFlattenableT<SkPathEffect>();
fPE1 = buffer.readFlattenableT<SkPathEffect>();
// either of these may fail, so we have to check for nulls later on
}
///////////////////////////////////////////////////////////////////////////////
bool SkComposePathEffect::filterPath(SkPath* dst, const SkPath& src,
SkStrokeRec* rec) {
// we may have failed to unflatten these, so we have to check
if (!fPE0 || !fPE1) {
return false;
}
SkPath tmp;
const SkPath* ptr = &src;
if (fPE1->filterPath(&tmp, src, rec)) {
ptr = &tmp;
}
return fPE0->filterPath(dst, *ptr, rec);
}
///////////////////////////////////////////////////////////////////////////////
bool SkSumPathEffect::filterPath(SkPath* dst, const SkPath& src,
SkStrokeRec* rec) {
// use bit-or so that we always call both, even if the first one succeeds
return fPE0->filterPath(dst, src, rec) | fPE1->filterPath(dst, src, rec);
}
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