зеркало из https://github.com/mozilla/moz-skia.git
68 строки
1.4 KiB
C++
68 строки
1.4 KiB
C++
|
|
/*
|
|
* Copyright 2011 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
#ifndef SkBoundaryPatch_DEFINED
|
|
#define SkBoundaryPatch_DEFINED
|
|
|
|
#include "SkPoint.h"
|
|
#include "SkRefCnt.h"
|
|
|
|
class SkBoundary : public SkRefCnt {
|
|
public:
|
|
SK_DECLARE_INST_COUNT(SkBoundary)
|
|
|
|
// These must be 0, 1, 2, 3 for efficiency in the subclass implementations
|
|
enum Edge {
|
|
kTop = 0,
|
|
kRight = 1,
|
|
kBottom = 2,
|
|
kLeft = 3
|
|
};
|
|
// Edge index goes clockwise around the boundary, beginning at the "top"
|
|
virtual SkPoint eval(Edge, SkScalar unitInterval) = 0;
|
|
|
|
private:
|
|
typedef SkRefCnt INHERITED;
|
|
};
|
|
|
|
class SkBoundaryPatch {
|
|
public:
|
|
SkBoundaryPatch();
|
|
~SkBoundaryPatch();
|
|
|
|
SkBoundary* getBoundary() const { return fBoundary; }
|
|
SkBoundary* setBoundary(SkBoundary*);
|
|
|
|
SkPoint eval(SkScalar unitU, SkScalar unitV);
|
|
bool evalPatch(SkPoint verts[], int rows, int cols);
|
|
|
|
private:
|
|
SkBoundary* fBoundary;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
class SkLineBoundary : public SkBoundary {
|
|
public:
|
|
SkPoint fPts[4];
|
|
|
|
// override
|
|
virtual SkPoint eval(Edge, SkScalar);
|
|
};
|
|
|
|
class SkCubicBoundary : public SkBoundary {
|
|
public:
|
|
// the caller sets the first 12 entries. The 13th is used by the impl.
|
|
SkPoint fPts[13];
|
|
|
|
// override
|
|
virtual SkPoint eval(Edge, SkScalar);
|
|
};
|
|
|
|
#endif
|
|
|