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picture-mixer

v1.0.6

Published

这是一个很'常用'的图片混合组件

Downloads

15

Readme

图片混合组件

这是一个很'常用'的图片混合组件。🍾

Git ActionsApache-2.0Stars npmnpm

支持平台

image

微信小程序

效果

image

层级

image

使用

新建小程序,如果存在跳过此步骤。

在项目目录下执行npm init生成package.json文件,如果存在package.json文件跳过此步骤。

执行npm i picture-mixer安装组件。

点击操作栏上的工具-构建npm成功之后将会出现一个miniprogram_npm文件夹。

引用组件

index.json

{
    "usingComponents": {
        "p-mixer": "/miniprogram_npm/picture-mixer/index"
    }, 
    "disableScroll": true // 防止ios随意拖拽
}
加载组件

index.wxml

<p-mixer id="pm"></p-mixer>
<view class="op">
  <button type="primary" bindtap="add">添加</button>
  <button type="primary" bindtap="save">保存</button>
</view>
<image class="preview" src="{{preSrc}}" style="width: {{w}}px; height: {{h}}px;" mode="scaleToFill"></image>
组件方法

index.js

Page({
    data: {
      preSrc: "",
      w: 0,
      h: 0
    },
    add() {
      wx.chooseMedia({
        count: 1,
        mediaType: ['image'],
        sourceType: ['album', 'camera'],
        maxDuration: 30,
        camera: 'back',
        success: (res) => {
          res.tempFiles.forEach(t => {
            try {
              this.selectComponent('#pm').add(t.tempFilePath)
            } catch (error) {
              console.log(error);
            }
          })
        }
      })
    },
    async save() {
      let res = await this.selectComponent('#pm').save()
      this.setData({ preSrc: res.tempFilePath, w: res.width, h: res.height })
    }
})
组件样式

index.wxss

page {
  display: flex;
  flex-direction: column;
}

#pm,
.preview {
  box-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
  margin: 20px auto;
}

.op {
  display: flex;
  justify-content: space-around;
}

button {
  display: inline-flex;
}

属性

config 🆕

config: IPictureMixerConfig 配置

/**
 * 图像操作按钮
 */
export interface IPictureOperateButton {
  /** 图片地址 */
  url?: string
  /** 轴心点 0~1 */
  pivotX?: number,
  pivotY?: number,
  /** 相对坐标 */
  offsetX?: number
  offsetY?: number
  width?: number
  height?: number
}
/**
 * 图片混合器配置
 */
export interface IPictureMixerConfig {
  /** 用于改变图片清晰度 尽量不要太大 
   * @version 1.0.1 
   */
  definition?: number
  /** 渲染间隔 ms */
  renderInterval?: number
  /** 允许缩放 写的很烂 */
  allowScale?: boolean
  /** 允许移动 */
  allowMove?: boolean
  /** 允许删除 */
  allowRemove?: boolean
  /** 允许旋转
   * @version 1.0.4
   */
  allowRotate?: boolean
  /**
   *  允许自动设置置顶
   *  逻辑点击哪个图片哪个图片置顶
   */
  allowAutoSetTop?: boolean
  /**
   * 允许展示水印
   * 仅在无图的时候展示
   * @version 1.0.3
   */
  allowWatermark?: boolean
  /** 背景颜色 */
  background?: string
  /** 点 */
  point?: {
    /** 颜色 点 */
    color?: string,
    /** 半径 */
    raduis?: number,
  },
  /** 线 */
  line?: {
    /** 颜色 线 */
    color?: string,
    /** 宽度 */
    width?: number
  },
  /** 缩放 */
  scale?: {
    /** 1.0.2 模式 */
    mode?: keyof IPictureMixerConfigScaleMode
    /** 1.0.2 最小缩放比例 */
    minRatio?: number
    /** 暂时还没用到 最小宽度 */
    minWidth?: number
    /** 暂时还没用到 最大高度 */
    minHeight?: number
  },
  /** 移动 */
  move?: {
    limitMode?: keyof IPictureMixerConfigMoveLimitMode
  }
  /** 添加 */
  add?: {
    /** 添加数量 */
    count?: number,
    /** 宽度比例 0~1 */
    scaleWidth?: number
    /** 高度比例 0~1 */
    scaleHeight?: number
  },
  /** 删除 */
  remove?: IPictureOperateButton,
  /** 保存默认值
   * @version 1.0.3
   */
  save?: {} & IPictureMixerSaveParams
  /** 水印图片
   * @version 1.0.2
   */
  watermark?: IPictureOperateButton
  /**
   * 旋转配置
   * @version 1.0.4
   */
  rotate?: IPictureOperateButton

}
/**
 * 保存图片的参数
 */
export interface IPictureMixerSaveParams {
  /**
   * 图片格式,默认为 image/png
   */
  type?: keyof IPictureMixerSaveType
  /**
   * 在指定图片格式为 image/jpeg 或 image/webp的情况下,可以从 0 到 1 的区间内选择图片的质量。如果超出取值范围,将会使用默认值 0.92。其他参数会被忽略。
   */
  encoderOptions?: number
}

interface IPictureMixerSaveType {
  'image/png': string
  'image/jpeg': string
  'image/webp': string
}
interface IPictureMixerConfigScaleMode {
  "width/height": string
  "ratio": string
}
interface IPictureMixerConfigMoveLimitMode {
  /** 默认 */
  none: string
  /** 限制图片 */
  picture: string
  /** 限制点 */
  point: string
}

方法

add

add(url: string) 添加图片

save

async save(p?: IPictureMixerSaveParams): Promise<IPictureMixerSaveResult> 保存图片

/**
 * 保存图片的参数
 */
export interface IPictureMixerSaveParams {
  /**
   * 图片格式,默认为 image/png
   */
  type?: keyof IPictureMixerSaveType
  /**
   * 在指定图片格式为 image/jpeg 或 image/webp的情况下,可以从 0 到 1 的区间内选择图片的质量。如果超出取值范围,将会使用默认值 0.92。其他参数会被忽略。
   */
  encoderOptions?: number
}

interface IPictureMixerSaveType {
  'image/png': string
  'image/jpeg': string
  'image/webp': string
}

export interface IPictureMixerSaveResult {
  /** BASE64字符串 */
  base64: string,
  /** 临时图片 */
  tempFilePath: string,
  /** 渲染的图片宽度 */
  width: number,
  /** 渲染的图片高度 */
  height: number
}

事件

loaded

loaded(e:IPicturnMixerLoadedParams) 加载完成

/**
 * 加载完成回调参数
 */
export interface IPicturnMixerLoadedParams {
  detail: {
    backgroundContext: CanvasRenderingContext2D,
    width: number,
    height: number
  }
}
change

change(e:IPicturnMixerLoadedParams) 内容变更

/**
 * 内容变更回调参数
 */
export interface IPicturnMixerChangeParams {
  detail: {
    pictures: Picture[]
  }
}
class Picture {
  url: string
  x: number
  y: number
  width: number
  height: number
  img: CanvasImageSource
  /** 初始值 */
  initialX: number
  initialY: number
  angle: number

  private _initialWidth: number
  private _initialHeight: number


  get initialWidth() {
    if (this.angle % 180 == 0)
      return this._initialWidth
    else
      return this._initialHeight;
  }
  get initialHeight() {
    if (this.angle % 180 == 0)
      return this._initialHeight
    else
      return this._initialWidth;

  }

  set initialWidth(val) {
    this._initialWidth = val;
  }
  set initialHeight(val) {
    this._initialHeight = val;
  }

  constructor(x?: number, y?: number, width?: number, height?: number) {
    this.initialX = this.x = x;
    this.initialY = this.y = y;
    this.initialWidth = this.width = width;
    this.initialHeight = this.height = height;
    this.angle = 0;
  }

  get leftTop() {
    return Vector2.c(this.x, this.y)
  }
  get rightTop() {
    return Vector2.c(this.x + this.width, this.y)
  }
  get rightBottom() {
    return Vector2.c(this.x + this.width, this.y + this.height)
  }
  get leftBottom() {
    return Vector2.c(this.x, this.y + this.height)
  }
  /**
   * 获取四个点坐标
   */
  get points(): Vector2[] {
    return [this.leftTop, this.rightTop, this.rightBottom, this.leftBottom]
  }
}