1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/utils/SkBoundaryPatch.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,66 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2011 Google Inc.
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 +#ifndef SkBoundaryPatch_DEFINED
1.12 +#define SkBoundaryPatch_DEFINED
1.13 +
1.14 +#include "SkPoint.h"
1.15 +#include "SkRefCnt.h"
1.16 +
1.17 +class SkBoundary : public SkRefCnt {
1.18 +public:
1.19 + SK_DECLARE_INST_COUNT(SkBoundary)
1.20 +
1.21 + // These must be 0, 1, 2, 3 for efficiency in the subclass implementations
1.22 + enum Edge {
1.23 + kTop = 0,
1.24 + kRight = 1,
1.25 + kBottom = 2,
1.26 + kLeft = 3
1.27 + };
1.28 + // Edge index goes clockwise around the boundary, beginning at the "top"
1.29 + virtual SkPoint eval(Edge, SkScalar unitInterval) = 0;
1.30 +
1.31 +private:
1.32 + typedef SkRefCnt INHERITED;
1.33 +};
1.34 +
1.35 +class SkBoundaryPatch {
1.36 +public:
1.37 + SkBoundaryPatch();
1.38 + ~SkBoundaryPatch();
1.39 +
1.40 + SkBoundary* getBoundary() const { return fBoundary; }
1.41 + SkBoundary* setBoundary(SkBoundary*);
1.42 +
1.43 + SkPoint eval(SkScalar unitU, SkScalar unitV);
1.44 + bool evalPatch(SkPoint verts[], int rows, int cols);
1.45 +
1.46 +private:
1.47 + SkBoundary* fBoundary;
1.48 +};
1.49 +
1.50 +////////////////////////////////////////////////////////////////////////
1.51 +
1.52 +class SkLineBoundary : public SkBoundary {
1.53 +public:
1.54 + SkPoint fPts[4];
1.55 +
1.56 + // override
1.57 + virtual SkPoint eval(Edge, SkScalar);
1.58 +};
1.59 +
1.60 +class SkCubicBoundary : public SkBoundary {
1.61 +public:
1.62 + // the caller sets the first 12 entries. The 13th is used by the impl.
1.63 + SkPoint fPts[13];
1.64 +
1.65 + // override
1.66 + virtual SkPoint eval(Edge, SkScalar);
1.67 +};
1.68 +
1.69 +#endif
