1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/utils/SkCullPoints.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,71 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkCullPoints_DEFINED
1.14 +#define SkCullPoints_DEFINED
1.15 +
1.16 +#include "SkRect.h"
1.17 +
1.18 +class SkCullPoints {
1.19 +public:
1.20 + SkCullPoints();
1.21 + SkCullPoints(const SkIRect& r);
1.22 +
1.23 + void reset(const SkIRect& r);
1.24 +
1.25 + /** Start a contour at (x,y). Follow this with call(s) to lineTo(...)
1.26 + */
1.27 + void moveTo(int x, int y);
1.28 +
1.29 + enum LineToResult {
1.30 + kNo_Result, //!< line segment was completely clipped out
1.31 + kLineTo_Result, //!< path.lineTo(pts[1]);
1.32 + kMoveToLineTo_Result //!< path.moveTo(pts[0]); path.lineTo(pts[1]);
1.33 + };
1.34 + /** Connect a line to the previous call to lineTo (or moveTo).
1.35 + */
1.36 + LineToResult lineTo(int x, int y, SkIPoint pts[2]);
1.37 +
1.38 +private:
1.39 + SkIRect fR; // the caller's rectangle
1.40 + SkIPoint fAsQuad[4]; // cache of fR as 4 points
1.41 + SkIPoint fPrevPt; // private state
1.42 + LineToResult fPrevResult; // private state
1.43 +
1.44 + bool sect_test(int x0, int y0, int x1, int y1) const;
1.45 +};
1.46 +
1.47 +/////////////////////////////////////////////////////////////////////////////////
1.48 +
1.49 +class SkPath;
1.50 +
1.51 +/** \class SkCullPointsPath
1.52 +
1.53 + Similar to SkCullPoints, but this class handles the return values
1.54 + from lineTo, and automatically builds a SkPath with the result(s).
1.55 +*/
1.56 +class SkCullPointsPath {
1.57 +public:
1.58 + SkCullPointsPath();
1.59 + SkCullPointsPath(const SkIRect& r, SkPath* dst);
1.60 +
1.61 + void reset(const SkIRect& r, SkPath* dst);
1.62 +
1.63 + void moveTo(int x, int y);
1.64 + void lineTo(int x, int y);
1.65 +
1.66 +private:
1.67 + SkCullPoints fCP;
1.68 + SkPath* fPath;
1.69 +};
1.70 +
1.71 +bool SkHitTestPath(const SkPath&, SkRect& target, bool hires);
1.72 +bool SkHitTestPath(const SkPath&, SkScalar x, SkScalar y, bool hires);
1.73 +
1.74 +#endif
