| |
| /* |
| * 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); |
| } |