94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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 Sk1DPathEffect : public SkPathEffect {
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public:
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// override from SkPathEffect
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virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width);
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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) = 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 distance, SkPathMeasure&) = 0;
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private:
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typedef SkPathEffect INHERITED;
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};
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class 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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SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style);
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// override from SkPathEffect
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virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width);
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protected:
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SkPath1DPathEffect(SkFlattenableReadBuffer& buffer);
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// overrides from Sk1DPathEffect
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virtual SkScalar begin(SkScalar contourLength);
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virtual SkScalar next(SkPath* dst, SkScalar distance, SkPathMeasure&);
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// overrides from SkFlattenable
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virtual void flatten(SkFlattenableWriteBuffer& );
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virtual Factory getFactory() { return CreateProc; }
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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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static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
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return SkNEW_ARGS(SkPath1DPathEffect, (buffer));
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}
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typedef Sk1DPathEffect INHERITED;
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};
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#endif
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