0a2bf90dcc
This is part of an effort to ensure that all SkPaint effects can only be allocated on the heap. This patch makes the constructors of SkPathEffect, SkXfermode and their subclasses non-public and instead provides factory methods for creating these objects on the heap. We temporarily keep the constructors of the following classes public to not break Chrome/Blink: SkXfermode SkCornerPathEffect SkDashPathEffect BUG=skia:2187 R=scroggo@google.com, reed@google.com, mtklein@google.com, bungeman@google.com Author: dominikg@chromium.org Review URL: https://codereview.chromium.org/166583002 git-svn-id: http://skia.googlecode.com/svn/trunk@13519 2bbb7eff-a529-9590-31e7-b0007b416f81
88 lines
2.9 KiB
C++
88 lines
2.9 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 Sk1DPathEffect_DEFINED
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#define Sk1DPathEffect_DEFINED
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#include "SkPathEffect.h"
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#include "SkPath.h"
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class SkPathMeasure;
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// This class is not exported to java.
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class SK_API Sk1DPathEffect : public SkPathEffect {
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public:
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virtual bool filterPath(SkPath* dst, const SkPath& src,
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SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
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protected:
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/** Called at the start of each contour, returns the initial offset
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into that contour.
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*/
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virtual SkScalar begin(SkScalar contourLength) const = 0;
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/** Called with the current distance along the path, with the current matrix
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for the point/tangent at the specified distance.
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Return the distance to travel for the next call. If return <= 0, then that
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contour is done.
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*/
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virtual SkScalar next(SkPath* dst, SkScalar dist, SkPathMeasure&) const = 0;
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private:
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typedef SkPathEffect INHERITED;
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};
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class SK_API SkPath1DPathEffect : public Sk1DPathEffect {
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public:
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enum Style {
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kTranslate_Style, // translate the shape to each position
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kRotate_Style, // rotate the shape about its center
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kMorph_Style, // transform each point, and turn lines into curves
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kStyleCount
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};
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/** Dash by replicating the specified path.
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@param path The path to replicate (dash)
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@param advance The space between instances of path
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@param phase distance (mod advance) along path for its initial position
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@param style how to transform path at each point (based on the current
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position and tangent)
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*/
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static SkPath1DPathEffect* Create(const SkPath& path, SkScalar advance, SkScalar phase,
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Style style) {
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return SkNEW_ARGS(SkPath1DPathEffect, (path, advance, phase, style));
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}
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virtual bool filterPath(SkPath*, const SkPath&,
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SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath1DPathEffect)
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protected:
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SkPath1DPathEffect(SkReadBuffer& buffer);
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virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
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// overrides from Sk1DPathEffect
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virtual SkScalar begin(SkScalar contourLength) const SK_OVERRIDE;
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virtual SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const SK_OVERRIDE;
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#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
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public:
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#endif
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SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style);
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private:
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SkPath fPath; // copied from constructor
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SkScalar fAdvance; // copied from constructor
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SkScalar fInitialOffset; // computed from phase
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Style fStyle; // copied from constructor
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typedef Sk1DPathEffect INHERITED;
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};
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#endif
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