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: 
michael@0: #include "Sk2DPathEffect.h"
michael@0: #include "SkReadBuffer.h"
michael@0: #include "SkWriteBuffer.h"
michael@0: #include "SkPath.h"
michael@0: #include "SkRegion.h"
michael@0: 
michael@0: Sk2DPathEffect::Sk2DPathEffect(const SkMatrix& mat) : fMatrix(mat) {
michael@0:     fMatrixIsInvertible = mat.invert(&fInverse);
michael@0: }
michael@0: 
michael@0: bool Sk2DPathEffect::filterPath(SkPath* dst, const SkPath& src,
michael@0:                                 SkStrokeRec*, const SkRect*) const {
michael@0:     if (!fMatrixIsInvertible) {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     SkPath  tmp;
michael@0:     SkIRect ir;
michael@0: 
michael@0:     src.transform(fInverse, &tmp);
michael@0:     tmp.getBounds().round(&ir);
michael@0:     if (!ir.isEmpty()) {
michael@0:         this->begin(ir, dst);
michael@0: 
michael@0:         SkRegion rgn;
michael@0:         rgn.setPath(tmp, SkRegion(ir));
michael@0:         SkRegion::Iterator iter(rgn);
michael@0:         for (; !iter.done(); iter.next()) {
michael@0:             const SkIRect& rect = iter.rect();
michael@0:             for (int y = rect.fTop; y < rect.fBottom; ++y) {
michael@0:                 this->nextSpan(rect.fLeft, y, rect.width(), dst);
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         this->end(dst);
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: void Sk2DPathEffect::nextSpan(int x, int y, int count, SkPath* path) const {
michael@0:     if (!fMatrixIsInvertible) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     const SkMatrix& mat = this->getMatrix();
michael@0:     SkPoint src, dst;
michael@0: 
michael@0:     src.set(SkIntToScalar(x) + SK_ScalarHalf, SkIntToScalar(y) + SK_ScalarHalf);
michael@0:     do {
michael@0:         mat.mapPoints(&dst, &src, 1);
michael@0:         this->next(dst, x++, y, path);
michael@0:         src.fX += SK_Scalar1;
michael@0:     } while (--count > 0);
michael@0: }
michael@0: 
michael@0: void Sk2DPathEffect::begin(const SkIRect& uvBounds, SkPath* dst) const {}
michael@0: void Sk2DPathEffect::next(const SkPoint& loc, int u, int v, SkPath* dst) const {}
michael@0: void Sk2DPathEffect::end(SkPath* dst) const {}
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: void Sk2DPathEffect::flatten(SkWriteBuffer& buffer) const {
michael@0:     this->INHERITED::flatten(buffer);
michael@0:     buffer.writeMatrix(fMatrix);
michael@0: }
michael@0: 
michael@0: Sk2DPathEffect::Sk2DPathEffect(SkReadBuffer& buffer) {
michael@0:     buffer.readMatrix(&fMatrix);
michael@0:     fMatrixIsInvertible = fMatrix.invert(&fInverse);
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: bool SkLine2DPathEffect::filterPath(SkPath* dst, const SkPath& src,
michael@0:                             SkStrokeRec* rec, const SkRect* cullRect) const {
michael@0:     if (this->INHERITED::filterPath(dst, src, rec, cullRect)) {
michael@0:         rec->setStrokeStyle(fWidth);
michael@0:         return true;
michael@0:     }
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: void SkLine2DPathEffect::nextSpan(int u, int v, int ucount, SkPath* dst) const {
michael@0:     if (ucount > 1) {
michael@0:         SkPoint    src[2], dstP[2];
michael@0: 
michael@0:         src[0].set(SkIntToScalar(u) + SK_ScalarHalf, SkIntToScalar(v) + SK_ScalarHalf);
michael@0:         src[1].set(SkIntToScalar(u+ucount) + SK_ScalarHalf, SkIntToScalar(v) + SK_ScalarHalf);
michael@0:         this->getMatrix().mapPoints(dstP, src, 2);
michael@0: 
michael@0:         dst->moveTo(dstP[0]);
michael@0:         dst->lineTo(dstP[1]);
michael@0:     }
michael@0: }
michael@0: 
michael@0: SkLine2DPathEffect::SkLine2DPathEffect(SkReadBuffer& buffer) : INHERITED(buffer) {
michael@0:     fWidth = buffer.readScalar();
michael@0: }
michael@0: 
michael@0: void SkLine2DPathEffect::flatten(SkWriteBuffer &buffer) const {
michael@0:     this->INHERITED::flatten(buffer);
michael@0:     buffer.writeScalar(fWidth);
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkPath2DPathEffect::SkPath2DPathEffect(const SkMatrix& m, const SkPath& p)
michael@0:     : INHERITED(m), fPath(p) {
michael@0: }
michael@0: 
michael@0: SkPath2DPathEffect::SkPath2DPathEffect(SkReadBuffer& buffer)
michael@0:         : INHERITED(buffer) {
michael@0:     buffer.readPath(&fPath);
michael@0: }
michael@0: 
michael@0: void SkPath2DPathEffect::flatten(SkWriteBuffer& buffer) const {
michael@0:     this->INHERITED::flatten(buffer);
michael@0:     buffer.writePath(fPath);
michael@0: }
michael@0: 
michael@0: void SkPath2DPathEffect::next(const SkPoint& loc, int u, int v,
michael@0:                               SkPath* dst) const {
michael@0:     dst->addPath(fPath, loc.fX, loc.fY);
michael@0: }