4e1c1a77ad
Makes computeFastBounds not part of the public API, it's only accessible to subclasses of SkPathEffect, GrStyle, and SkPaint. Subclasses can invoke it other path effects using SkPathEffectPriv::ComputeFastBounds. Changes the internal function to bool computeFastBounds(SkRect* bounds) const; Subclasses of SkPathEffect must implement this, and can choose to return false when fast bounds aren't computable. Provides implementations of computeFastBounds() for path effects bundled with Skia. Bug: skia:11974 Change-Id: I545ccf99b4e669d3af9df13acfac28573306fab8 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/406140 Commit-Queue: Michael Ludwig <michaelludwig@google.com> Reviewed-by: Mike Reed <reed@google.com>
109 lines
3.3 KiB
C++
109 lines
3.3 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 "include/core/SkFlattenable.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkPathEffect.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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// For simplicity, assume fast bounds cannot be computed
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bool computeFastBounds(SkRect*) const override { return false; }
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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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using INHERITED = SkPathEffect;
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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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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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SK_FLATTENABLE_HOOKS(SkLine2DPathEffect)
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SkScalar fWidth;
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using INHERITED = Sk2DPathEffect;
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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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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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SK_FLATTENABLE_HOOKS(SkPath2DPathEffect)
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SkPath fPath;
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using INHERITED = Sk2DPathEffect;
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};
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#endif
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