125 lines
2.8 KiB
C++
125 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <array>
|
|
|
|
#include <folly/Hash.h>
|
|
#include <react/graphics/Float.h>
|
|
#include <react/graphics/Geometry.h>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
/*
|
|
* Defines transform matrix to apply affine transformations.
|
|
*/
|
|
struct Transform {
|
|
std::array<Float, 16> matrix{
|
|
{1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1}};
|
|
|
|
/*
|
|
* Returns the identity transform (`[1 0 0 0; 0 1 0 0; 0 0 1 0; 0 0 0 1]`).
|
|
*/
|
|
static Transform Identity();
|
|
|
|
/*
|
|
* Returns a Perspective transform.
|
|
*/
|
|
static Transform Perspective(Float perspective);
|
|
|
|
/*
|
|
* Returns a Scale transform.
|
|
*/
|
|
static Transform Scale(Float factorX, Float factorY, Float factorZ);
|
|
|
|
/*
|
|
* Returns a Translate transform.
|
|
*/
|
|
static Transform Translate(Float x, Float y, Float z);
|
|
|
|
/*
|
|
* Returns a Skew transform.
|
|
*/
|
|
static Transform Skew(Float x, Float y);
|
|
|
|
/*
|
|
* Returns a transform that rotates by `angle` radians along the given axis.
|
|
*/
|
|
static Transform RotateX(Float angle);
|
|
static Transform RotateY(Float angle);
|
|
static Transform RotateZ(Float angle);
|
|
static Transform Rotate(Float angleX, Float angleY, Float angleZ);
|
|
|
|
/*
|
|
* Equality operators.
|
|
*/
|
|
bool operator==(Transform const &rhs) const;
|
|
bool operator!=(Transform const &rhs) const;
|
|
|
|
/*
|
|
* Matrix subscript.
|
|
*/
|
|
Float &at(int x, int y);
|
|
Float const &at(int x, int y) const;
|
|
|
|
/*
|
|
* Concatenates (multiplies) transform matrices.
|
|
*/
|
|
Transform operator*(Transform const &rhs) const;
|
|
};
|
|
|
|
/*
|
|
* Applies tranformation to the given point.
|
|
*/
|
|
Point operator*(Point const &point, Transform const &transform);
|
|
|
|
/*
|
|
* Applies tranformation to the given size.
|
|
*/
|
|
Size operator*(Size const &size, Transform const &transform);
|
|
|
|
/*
|
|
* Applies tranformation to the given rect.
|
|
* ONLY SUPPORTS scale and translation transformation.
|
|
*/
|
|
Rect operator*(Rect const &rect, Transform const &transform);
|
|
|
|
Vector operator*(Transform const &transform, Vector const &vector);
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|
|
|
|
namespace std {
|
|
|
|
template <>
|
|
struct hash<facebook::react::Transform> {
|
|
size_t operator()(const facebook::react::Transform &transform) const {
|
|
return folly::hash::hash_combine(
|
|
0,
|
|
transform.matrix[0],
|
|
transform.matrix[1],
|
|
transform.matrix[2],
|
|
transform.matrix[3],
|
|
transform.matrix[4],
|
|
transform.matrix[5],
|
|
transform.matrix[6],
|
|
transform.matrix[7],
|
|
transform.matrix[8],
|
|
transform.matrix[9],
|
|
transform.matrix[10],
|
|
transform.matrix[11],
|
|
transform.matrix[12],
|
|
transform.matrix[13],
|
|
transform.matrix[14],
|
|
transform.matrix[15]);
|
|
}
|
|
};
|
|
|
|
} // namespace std
|