9fa60daad4
Refactoring pattern: 1. guard the existing constructor(readbuffer) with the legacy build-flag 2. If you are a instancable subclass, implement CreateProc(readbuffer) to create a new instances from the buffer params (or return NULL). If you're a shader subclass 1. You must read/write the local matrix if your class accepts that in its factory/constructor, else ignore it. R=robertphillips@google.com, mtklein@google.com, senorblanco@google.com, senorblanco@chromium.org, sugoi@chromium.org Author: reed@google.com Review URL: https://codereview.chromium.org/395603002
63 lines
2.2 KiB
C++
63 lines
2.2 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 SkDiscretePathEffect_DEFINED
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#define SkDiscretePathEffect_DEFINED
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#include "SkPathEffect.h"
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/** \class SkDiscretePathEffect
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This path effect chops a path into discrete segments, and randomly displaces them.
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*/
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class SK_API SkDiscretePathEffect : public SkPathEffect {
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public:
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/** Break the path into segments of segLength length, and randomly move the endpoints
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away from the original path by a maximum of deviation.
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Note: works on filled or framed paths
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@param seedAssist This is a caller-supplied seedAssist that modifies
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the seed value that is used to randomize the path
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segments' endpoints. If not supplied it defaults to 0,
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in which case filtering a path multiple times will
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result in the same set of segments (this is useful for
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testing). If a caller does not want this behaviour
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they can pass in a different seedAssist to get a
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different set of path segments.
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*/
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static SkDiscretePathEffect* Create(SkScalar segLength,
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SkScalar deviation,
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uint32_t seedAssist=0) {
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return SkNEW_ARGS(SkDiscretePathEffect,
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(segLength, deviation, seedAssist));
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}
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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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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiscretePathEffect)
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protected:
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SkDiscretePathEffect(SkScalar segLength,
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SkScalar deviation,
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uint32_t seedAssist);
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#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
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explicit SkDiscretePathEffect(SkReadBuffer&);
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#endif
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virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
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private:
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SkScalar fSegLength, fPerterb;
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/* Caller-supplied 32 bit seed assist */
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uint32_t fSeedAssist;
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typedef SkPathEffect INHERITED;
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};
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#endif
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