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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPatchUtils_DEFINED
#define SkPatchUtils_DEFINED
#include "SkColorData.h"
#include "SkMatrix.h"
#include "SkVertices.h"
class SK_API SkPatchUtils {
public:
// Enums for control points based on the order specified in the constructor (clockwise).
enum {
kNumCtrlPts = 12,
kNumCorners = 4,
kNumPtsCubic = 4
};
/**
* Get the points corresponding to the top cubic of cubics.
*/
static void GetTopCubic(const SkPoint cubics[12], SkPoint points[4]);
/**
* Get the points corresponding to the bottom cubic of cubics.
*/
static void GetBottomCubic(const SkPoint cubics[12], SkPoint points[4]);
/**
* Get the points corresponding to the left cubic of cubics.
*/
static void GetLeftCubic(const SkPoint cubics[12], SkPoint points[4]);
/**
* Get the points corresponding to the right cubic of cubics.
*/
static void GetRightCubic(const SkPoint cubics[12], SkPoint points[4]);
/**
* Method that calculates a level of detail (number of subdivisions) for a patch in both axis.
*/
static SkISize GetLevelOfDetail(const SkPoint cubics[12], const SkMatrix* matrix);
static sk_sp<SkVertices> MakeVertices(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], int lodX, int lodY,
bool interpColorsLinearly = false);
};
#endif
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