/*
|
* 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 SkColorSpace;
|
|
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,
|
SkColorSpace* colorSpace = nullptr);
|
};
|
|
#endif
|
