Package Exports

transform-image-data
transform-image-data/dist/index.js

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Readme

TransformImageData

Installation

Install with npm:

npm install transform-image-data

class TransformImageData

Constructor

new TransformImageData(param: param, slient?: boolean) => TransformImageData

param
- inw: number 输入宽
- inh: number 输入高
- inData: ArrayBuffer 输入图像缓冲区
- outw: number 输出宽
- outh: number 输出高
- outData: ArrayBuffer 输出图像缓冲区
- minWH?: number (defalut: 1) 输入窗口转化到输出窗口后最小的宽高尺寸；默认值:1
- maxWH?: number 输入窗口转化到输出窗口后最大的宽高尺寸；默认值:Infinity
silent?: boolean 是否计算输入输出窗口之间的变化矩阵；默认值：false

Instance Function

.update() 更新outData

.translate(dx: number, dy: number, silent?: boolean) 平移

.zoom(cx: number, cy: number, ratio: number, silent?: boolean) 以(cx,cy)为中心缩放ratio比例

.resize(silent?: boolean) 将输入数据完整放置于输出窗口的正中间

.scrollToRect(x: number, y: number, width: number, height: number, margin?: number) 将输入窗口的roi:[x,y,width,heigght]区域放置于输出窗口正中间

.updateMatrix(scale: number, dx: number, dy: number) 更新输入->输出矩阵

.inCoorIsIn(x: number, y: number): boolean 坐标(x,y)是否位于输出视框内

.outCoorIsIn(x: number, y: number): boolean 坐标(x,y)是否位于输出视框内

.transInToOut(coors: number[]) 将输入坐标组(x,y,...)转化为输出坐标组

.transOutToIn(coors: number[]) 将输出坐标组(x,y,...)转化为输入坐标组