76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/*
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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 SkCullPoints_DEFINED
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#define SkCullPoints_DEFINED
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#include "SkRect.h"
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class SkCullPoints {
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public:
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SkCullPoints();
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SkCullPoints(const SkIRect& r);
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void reset(const SkIRect& r);
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/** Start a contour at (x,y). Follow this with call(s) to lineTo(...)
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*/
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void moveTo(int x, int y);
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enum LineToResult {
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kNo_Result, //!< line segment was completely clipped out
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kLineTo_Result, //!< path.lineTo(pts[1]);
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kMoveToLineTo_Result //!< path.moveTo(pts[0]); path.lineTo(pts[1]);
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};
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/** Connect a line to the previous call to lineTo (or moveTo).
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*/
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LineToResult lineTo(int x, int y, SkIPoint pts[2]);
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private:
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SkIRect fR; // the caller's rectangle
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SkIPoint fAsQuad[4]; // cache of fR as 4 points
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SkIPoint fPrevPt; // private state
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LineToResult fPrevResult; // private state
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bool sect_test(int x0, int y0, int x1, int y1) const;
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};
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/////////////////////////////////////////////////////////////////////////////////
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class SkPath;
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/** \class SkCullPointsPath
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Similar to SkCullPoints, but this class handles the return values
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from lineTo, and automatically builds a SkPath with the result(s).
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*/
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class SkCullPointsPath {
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public:
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SkCullPointsPath();
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SkCullPointsPath(const SkIRect& r, SkPath* dst);
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void reset(const SkIRect& r, SkPath* dst);
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void moveTo(int x, int y);
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void lineTo(int x, int y);
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private:
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SkCullPoints fCP;
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SkPath* fPath;
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};
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#endif
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