1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/core/SkEdgeClipper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,51 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2009 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 SkEdgeClipper_DEFINED
1.14 +#define SkEdgeClipper_DEFINED
1.15 +
1.16 +#include "SkPath.h"
1.17 +
1.18 +/** This is basically an iterator. It is initialized with an edge and a clip,
1.19 + and then next() is called until it returns kDone_Verb.
1.20 + */
1.21 +class SkEdgeClipper {
1.22 +public:
1.23 + bool clipQuad(const SkPoint pts[3], const SkRect& clip);
1.24 + bool clipCubic(const SkPoint pts[4], const SkRect& clip);
1.25 +
1.26 + SkPath::Verb next(SkPoint pts[]);
1.27 +
1.28 +private:
1.29 + SkPoint* fCurrPoint;
1.30 + SkPath::Verb* fCurrVerb;
1.31 +
1.32 + enum {
1.33 + kMaxVerbs = 13,
1.34 + kMaxPoints = 32
1.35 + };
1.36 + SkPoint fPoints[kMaxPoints];
1.37 + SkPath::Verb fVerbs[kMaxVerbs];
1.38 +
1.39 + void clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip);
1.40 + void clipMonoCubic(const SkPoint srcPts[4], const SkRect& clip);
1.41 + void appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse);
1.42 + void appendQuad(const SkPoint pts[3], bool reverse);
1.43 + void appendCubic(const SkPoint pts[4], bool reverse);
1.44 +};
1.45 +
1.46 +#ifdef SK_DEBUG
1.47 + void sk_assert_monotonic_x(const SkPoint pts[], int count);
1.48 + void sk_assert_monotonic_y(const SkPoint pts[], int count);
1.49 +#else
1.50 + #define sk_assert_monotonic_x(pts, count)
1.51 + #define sk_assert_monotonic_y(pts, count)
1.52 +#endif
1.53 +
1.54 +#endif
