6d10f8bda1
- change filterPath to safely handle if src and dst are aliases Bug: skia:8254 Change-Id: I125d19404ca0a610f73271abb5c5455d1d50f9ed Reviewed-on: https://skia-review.googlesource.com/147466 Commit-Queue: Mike Reed <reed@google.com> Commit-Queue: Kevin Lubick <kjlubick@google.com> Reviewed-by: Kevin Lubick <kjlubick@google.com> Auto-Submit: Mike Reed <reed@google.com>
112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef Sk2DPathEffect_DEFINED
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#define Sk2DPathEffect_DEFINED
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#include "SkFlattenable.h"
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#include "SkPath.h"
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#include "SkPathEffect.h"
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#include "SkMatrix.h"
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class SK_API Sk2DPathEffect : public SkPathEffect {
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protected:
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/** New virtual, to be overridden by subclasses.
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This is called once from filterPath, and provides the
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uv parameter bounds for the path. Subsequent calls to
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next() will receive u and v values within these bounds,
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and then a call to end() will signal the end of processing.
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*/
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virtual void begin(const SkIRect& uvBounds, SkPath* dst) const;
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virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) const;
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virtual void end(SkPath* dst) const;
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/** Low-level virtual called per span of locations in the u-direction.
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The default implementation calls next() repeatedly with each
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location.
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*/
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virtual void nextSpan(int u, int v, int ucount, SkPath* dst) const;
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const SkMatrix& getMatrix() const { return fMatrix; }
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// protected so that subclasses can call this during unflattening
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explicit Sk2DPathEffect(const SkMatrix& mat);
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void flatten(SkWriteBuffer&) const override;
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bool onFilterPath(SkPath*, const SkPath&, SkStrokeRec*, const SkRect*) const override;
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private:
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SkMatrix fMatrix, fInverse;
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bool fMatrixIsInvertible;
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// illegal
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Sk2DPathEffect(const Sk2DPathEffect&);
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Sk2DPathEffect& operator=(const Sk2DPathEffect&);
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friend class Sk2DPathEffectBlitter;
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typedef SkPathEffect INHERITED;
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};
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class SK_API SkLine2DPathEffect : public Sk2DPathEffect {
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public:
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static sk_sp<SkPathEffect> Make(SkScalar width, const SkMatrix& matrix) {
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if (!(width >= 0)) {
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return nullptr;
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}
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return sk_sp<SkPathEffect>(new SkLine2DPathEffect(width, matrix));
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}
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Factory getFactory() const override { return CreateProc; }
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protected:
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SkLine2DPathEffect(SkScalar width, const SkMatrix& matrix)
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: Sk2DPathEffect(matrix), fWidth(width) {
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SkASSERT(width >= 0);
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}
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void flatten(SkWriteBuffer&) const override;
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bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*) const override;
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void nextSpan(int u, int v, int ucount, SkPath*) const override;
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private:
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static sk_sp<SkFlattenable> CreateProc(SkReadBuffer&);
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friend class SkFlattenable::PrivateInitializer;
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SkScalar fWidth;
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typedef Sk2DPathEffect INHERITED;
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};
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class SK_API SkPath2DPathEffect : public Sk2DPathEffect {
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public:
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/**
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* Stamp the specified path to fill the shape, using the matrix to define
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* the latice.
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*/
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static sk_sp<SkPathEffect> Make(const SkMatrix& matrix, const SkPath& path) {
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return sk_sp<SkPathEffect>(new SkPath2DPathEffect(matrix, path));
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}
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Factory getFactory() const override { return CreateProc; }
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protected:
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SkPath2DPathEffect(const SkMatrix&, const SkPath&);
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void flatten(SkWriteBuffer&) const override;
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void next(const SkPoint&, int u, int v, SkPath*) const override;
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private:
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static sk_sp<SkFlattenable> CreateProc(SkReadBuffer&);
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friend class SkFlattenable::PrivateInitializer;
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SkPath fPath;
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typedef Sk2DPathEffect INHERITED;
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};
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#endif
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