2054 lines
53 KiB
Vue
2054 lines
53 KiB
Vue
<template>
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<div class="vue-cropper" ref="cropper" @mouseover="scaleImg" @mouseout="cancelScale">
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<div class="cropper-box" v-if="imgs">
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<div class="cropper-box-canvas" v-show="!loading" :style="{
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'width': trueWidth + 'px',
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'height': trueHeight + 'px',
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'transform': 'scale(' + scale + ',' + scale + ') ' + 'translate3d('+ x / scale + 'px,' + y / scale + 'px,' + '0)'
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+ 'rotateZ('+ rotate * 90 +'deg)'
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}">
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<img :src="imgs" alt="cropper-img" ref="cropperImg">
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</div>
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</div>
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<div class="cropper-drag-box"
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:class="{'cropper-move': move && !crop, 'cropper-crop': crop, 'cropper-modal': cropping}"
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@mousedown="startMove" @touchstart="startMove"></div>
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<div v-show="cropping" class="cropper-crop-box" :style="{
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'width': cropW + 'px',
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'height': cropH + 'px',
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'transform': 'translate3d('+ cropOffsertX + 'px,' + cropOffsertY + 'px,' + '0)'
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}">
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<span class="cropper-view-box">
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<img :style="{
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'width': trueWidth + 'px',
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'height': trueHeight + 'px',
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'transform': 'scale(' + scale + ',' + scale + ') ' + 'translate3d('+ (x - cropOffsertX) / scale + 'px,' + (y - cropOffsertY) / scale + 'px,' + '0)'
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+ 'rotateZ('+ rotate * 90 +'deg)'
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}" :src="imgs" alt="cropper-img">
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</span>
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<span class="cropper-face cropper-move" @mousedown="cropMove" @touchstart="cropMove"></span>
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<span class="crop-info" v-if="info" :style="{'top': cropInfo.top}">{{ cropInfo.width }} ×
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{{ cropInfo.height }}</span>
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<span v-if="!fixedBox">
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<span class="crop-line line-w" @mousedown="changeCropSize($event, false, true, 0, 1)"
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@touchstart="changeCropSize($event, false, true, 0, 1)"></span>
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<span class="crop-line line-a" @mousedown="changeCropSize($event, true, false, 1, 0)"
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@touchstart="changeCropSize($event, true, false, 1, 0)"></span>
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<span class="crop-line line-s" @mousedown="changeCropSize($event, false, true, 0, 2)"
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@touchstart="changeCropSize($event, false, true, 0, 2)"></span>
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<span class="crop-line line-d" @mousedown="changeCropSize($event, true, false, 2, 0)"
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@touchstart="changeCropSize($event, true, false, 2, 0)"></span>
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<span class="crop-point point1" @mousedown="changeCropSize($event, true, true, 1, 1)"
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@touchstart="changeCropSize($event, true, true, 1, 1)"></span>
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<span class="crop-point point2" @mousedown="changeCropSize($event, false, true, 0, 1)"
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@touchstart="changeCropSize($event, false, true, 0, 1)"></span>
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<span class="crop-point point3" @mousedown="changeCropSize($event, true, true, 2, 1)"
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@touchstart="changeCropSize($event, true, true, 2, 1)"></span>
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<span class="crop-point point4" @mousedown="changeCropSize($event, true, false, 1, 0)"
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@touchstart="changeCropSize($event, true, false, 1, 0)"></span>
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<span class="crop-point point5" @mousedown="changeCropSize($event, true, false, 2, 0)"
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@touchstart="changeCropSize($event, true, false, 2, 0)"></span>
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<span class="crop-point point6" @mousedown="changeCropSize($event, true, true, 1, 2)"
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@touchstart="changeCropSize($event, true, true, 1, 2)"></span>
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<span class="crop-point point7" @mousedown="changeCropSize($event, false, true, 0, 2)"
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@touchstart="changeCropSize($event, false, true, 0, 2)"></span>
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<span class="crop-point point8" @mousedown="changeCropSize($event, true, true, 2, 2)"
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@touchstart="changeCropSize($event, true, true, 2, 2)"></span>
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</span>
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</div>
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</div>
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</template>
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<script>
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import exifmin from "./exif-js-min";
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export default {
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data: function() {
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return {
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// 容器高宽
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w: 0,
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h: 0,
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// 图片缩放比例
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scale: 1,
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// 图片偏移x轴
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x: 0,
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// 图片偏移y轴
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y: 0,
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// 图片加载
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loading: true,
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// 图片真实宽度
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trueWidth: 0,
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// 图片真实高度
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trueHeight: 0,
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move: true,
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// 移动的x
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moveX: 0,
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// 移动的y
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moveY: 0,
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// 开启截图
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crop: false,
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// 正在截图
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cropping: false,
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// 裁剪框大小
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cropW: 0,
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cropH: 0,
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cropOldW: 0,
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cropOldH: 0,
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// 判断是否能够改变
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canChangeX: false,
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canChangeY: false,
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// 改变的基准点
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changeCropTypeX: 1,
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changeCropTypeY: 1,
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// 裁剪框的坐标轴
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cropX: 0,
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cropY: 0,
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cropChangeX: 0,
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cropChangeY: 0,
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cropOffsertX: 0,
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cropOffsertY: 0,
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// 支持的滚动事件
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support: "",
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// 移动端手指缩放
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touches: [],
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touchNow: false,
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// 图片旋转
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rotate: 0,
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isIos: false,
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orientation: 0,
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imgs: "",
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// 图片缩放系数
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coe: 0.2,
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// 是否正在多次缩放
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scaling: false,
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scalingSet: "",
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coeStatus: "",
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// 控制emit触发频率
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isCanShow: true
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};
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},
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props: {
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img: {
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type: [String, Blob, null, File],
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default: ""
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},
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// 输出图片压缩比
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outputSize: {
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type: Number,
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default: 1
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},
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outputType: {
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type: String,
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default: "jpeg"
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},
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info: {
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type: Boolean,
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default: true
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},
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// 是否开启滚轮放大缩小
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canScale: {
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type: Boolean,
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default: true
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},
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// 是否自成截图框
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autoCrop: {
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type: Boolean,
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default: false
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},
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autoCropWidth: {
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type: [Number, String],
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default: 0
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},
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autoCropHeight: {
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type: [Number, String],
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default: 0
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},
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// 是否开启固定宽高比
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fixed: {
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type: Boolean,
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default: false
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},
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// 宽高比 w/h
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fixedNumber: {
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type: Array,
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default: () => {
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return [1, 1];
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}
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},
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// 固定大小 禁止改变截图框大小
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fixedBox: {
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type: Boolean,
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default: false
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},
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// 输出截图是否缩放
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full: {
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type: Boolean,
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default: false
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},
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// 是否可以拖动图片
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canMove: {
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type: Boolean,
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default: true
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},
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// 是否可以拖动截图框
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canMoveBox: {
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type: Boolean,
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default: true
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},
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// 上传图片按照原始比例显示
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original: {
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type: Boolean,
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default: false
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},
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// 截图框能否超过图片
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centerBox: {
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type: Boolean,
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default: false
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},
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// 是否根据dpr输出高清图片
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high: {
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type: Boolean,
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default: true
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},
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// 截图框展示宽高类型
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infoTrue: {
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type: Boolean,
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default: false
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},
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// 可以压缩图片宽高 默认不超过200
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maxImgSize: {
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type: [Number, String],
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default: 2000
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},
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// 倍数 可渲染当前截图框的n倍 0 - 1000;
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enlarge: {
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type: [Number, String],
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default: 1
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},
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// 自动预览的固定宽度
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preW: {
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type: [Number, String],
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default: 0
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},
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/*
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图片布局方式 mode 实现和css背景一样的效果
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contain 居中布局 默认不会缩放 保证图片在容器里面 mode: 'contain'
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cover 拉伸布局 填充整个容器 mode: 'cover'
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如果仅有一个数值被给定，这个数值将作为宽度值大小，高度值将被设定为auto。 mode: '50px'
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如果有两个数值被给定，第一个将作为宽度值大小，第二个作为高度值大小。 mode: '50px 60px'
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*/
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mode: {
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type: String,
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default: "contain"
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},
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//限制最小区域,可传1以上的数字和字符串，限制长宽都是这么大
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// 也可以传数组[90,90]
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limitMinSize: {
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type: [Number, Array, String],
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default: () => {
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return 10;
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}
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},
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},
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computed: {
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cropInfo() {
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let obj = {};
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obj.top = this.cropOffsertY > 21 ? "-21px" : "0px";
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obj.width = this.cropW > 0 ? this.cropW : 0;
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obj.height = this.cropH > 0 ? this.cropH : 0;
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if (this.infoTrue) {
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let dpr = 1;
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if (this.high && !this.full) {
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dpr = window.devicePixelRatio;
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}
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if ((this.enlarge !== 1) & !this.full) {
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dpr = Math.abs(Number(this.enlarge));
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}
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obj.width = obj.width * dpr;
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obj.height = obj.height * dpr;
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if (this.full) {
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obj.width = obj.width / this.scale;
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obj.height = obj.height / this.scale;
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}
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}
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obj.width = obj.width.toFixed(0);
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obj.height = obj.height.toFixed(0);
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return obj;
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},
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isIE() {
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var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
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const isIE = !!window.ActiveXObject || 'ActiveXObject' in window; //判断是否IE浏览器
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return isIE;
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},
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passive() {
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return this.isIE ? null : {
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passive: false
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}
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}
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},
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watch: {
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// 如果图片改变， 重新布局
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img() {
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// 当传入图片时, 读取图片信息同时展示
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this.checkedImg();
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},
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imgs(val) {
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if (val === "") {
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return;
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}
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this.reload();
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},
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cropW() {
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this.showPreview();
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},
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cropH() {
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this.showPreview();
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},
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cropOffsertX() {
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this.showPreview();
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},
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cropOffsertY() {
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this.showPreview();
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},
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scale(val, oldVal) {
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this.showPreview();
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},
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x() {
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this.showPreview();
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},
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y() {
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this.showPreview();
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},
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autoCrop(val) {
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if (val) {
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this.goAutoCrop();
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}
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},
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// 修改了自动截图框
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autoCropWidth() {
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if (this.autoCrop) {
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this.goAutoCrop();
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}
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},
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autoCropHeight() {
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if (this.autoCrop) {
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this.goAutoCrop();
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}
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},
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mode() {
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this.checkedImg();
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},
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rotate() {
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this.showPreview();
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if (this.autoCrop) {
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this.goAutoCrop(this.cropW, this.cropH);
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} else {
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if (this.cropW > 0 || this.cropH > 0) {
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this.goAutoCrop(this.cropW, this.cropH);
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}
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}
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}
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},
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methods: {
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getVersion(name) {
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var arr = navigator.userAgent.split(' ');
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var chromeVersion = '';
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let result = 0;
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const reg = new RegExp(name, 'i')
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for (var i = 0; i < arr.length; i++) {
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if (reg.test(arr[i]))
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chromeVersion = arr[i]
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}
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if (chromeVersion) {
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result = chromeVersion.split('/')[1].split('.');
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} else {
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result = ['0', '0', '0'];
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}
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return result
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},
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checkOrientationImage(img, orientation, width, height) {
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// 如果是 chrome内核版本在81 safari 在 605 以上不处理图片旋转
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// alert(navigator.userAgent)
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if (this.getVersion('chrome')[0] >= 81) {
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orientation = -1
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} else {
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if (this.getVersion('safari')[0] >= 605) {
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const safariVersion = this.getVersion('version')
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if (safariVersion[0] > 13 && safariVersion[1] > 1) {
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orientation = -1
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}
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} else {
|
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// 判断 ios 版本进行处理
|
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// 针对 ios 版本大于 13.4的系统不做图片旋转
|
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const isIos = navigator.userAgent.toLowerCase().match(/cpu iphone os (.*?) like mac os/)
|
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if (isIos) {
|
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let version = isIos[1]
|
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version = version.split('_')
|
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if (version[0] > 13 || (version[0] >= 13 && version[1] >= 4)) {
|
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orientation = -1
|
||
}
|
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}
|
||
}
|
||
}
|
||
|
||
// alert(`当前处理的orientation${orientation}`)
|
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let canvas = document.createElement("canvas");
|
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let ctx = canvas.getContext("2d");
|
||
ctx.save();
|
||
|
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switch (orientation) {
|
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case 2:
|
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canvas.width = width;
|
||
canvas.height = height;
|
||
// horizontal flip
|
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ctx.translate(width, 0);
|
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ctx.scale(-1, 1);
|
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break;
|
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case 3:
|
||
canvas.width = width;
|
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canvas.height = height;
|
||
//180 graus
|
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ctx.translate(width / 2, height / 2);
|
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ctx.rotate((180 * Math.PI) / 180);
|
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ctx.translate(-width / 2, -height / 2);
|
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break;
|
||
case 4:
|
||
canvas.width = width;
|
||
canvas.height = height;
|
||
// vertical flip
|
||
ctx.translate(0, height);
|
||
ctx.scale(1, -1);
|
||
break;
|
||
case 5:
|
||
// vertical flip + 90 rotate right
|
||
canvas.height = width;
|
||
canvas.width = height;
|
||
ctx.rotate(0.5 * Math.PI);
|
||
ctx.scale(1, -1);
|
||
break;
|
||
case 6:
|
||
canvas.width = height;
|
||
canvas.height = width;
|
||
//90 graus
|
||
ctx.translate(height / 2, width / 2);
|
||
ctx.rotate((90 * Math.PI) / 180);
|
||
ctx.translate(-width / 2, -height / 2);
|
||
break;
|
||
case 7:
|
||
// horizontal flip + 90 rotate right
|
||
canvas.height = width;
|
||
canvas.width = height;
|
||
ctx.rotate(0.5 * Math.PI);
|
||
ctx.translate(width, -height);
|
||
ctx.scale(-1, 1);
|
||
break;
|
||
case 8:
|
||
canvas.height = width;
|
||
canvas.width = height;
|
||
//-90 graus
|
||
ctx.translate(height / 2, width / 2);
|
||
ctx.rotate((-90 * Math.PI) / 180);
|
||
ctx.translate(-width / 2, -height / 2);
|
||
break;
|
||
default:
|
||
canvas.width = width;
|
||
canvas.height = height;
|
||
}
|
||
|
||
ctx.drawImage(img, 0, 0, width, height);
|
||
ctx.restore();
|
||
canvas.toBlob(
|
||
blob => {
|
||
let data = URL.createObjectURL(blob);
|
||
URL.revokeObjectURL(this.imgs)
|
||
this.imgs = data;
|
||
},
|
||
"image/" + this.outputType,
|
||
1
|
||
);
|
||
},
|
||
|
||
// checkout img
|
||
checkedImg() {
|
||
if (this.img === null || this.img === '') {
|
||
this.imgs = ''
|
||
this.clearCrop()
|
||
return
|
||
}
|
||
this.loading = true;
|
||
this.scale = 1;
|
||
this.rotate = 0;
|
||
this.clearCrop();
|
||
let img = new Image();
|
||
img.onload = () => {
|
||
if (this.img === "") {
|
||
this.$emit("imgLoad", "error");
|
||
this.$emit("img-load", "error");
|
||
return false;
|
||
}
|
||
|
||
let width = img.width;
|
||
let height = img.height;
|
||
exifmin.getData(img).then(data => {
|
||
this.orientation = data.orientation || 1;
|
||
let max = Number(this.maxImgSize);
|
||
if (!this.orientation && (width < max) & (height < max)) {
|
||
this.imgs = this.img;
|
||
return;
|
||
}
|
||
|
||
if (width > max) {
|
||
height = (height / width) * max;
|
||
width = max;
|
||
}
|
||
|
||
if (height > max) {
|
||
width = (width / height) * max;
|
||
height = max;
|
||
}
|
||
this.checkOrientationImage(img, this.orientation, width, height);
|
||
});
|
||
};
|
||
|
||
img.onerror = () => {
|
||
this.$emit("imgLoad", "error");
|
||
this.$emit("img-load", "error");
|
||
};
|
||
|
||
// 判断如果不是base64图片 再添加crossOrigin属性，否则会导致iOS低版本(10.2)无法显示图片
|
||
if (this.img.substr(0, 4) !== "data") {
|
||
img.crossOrigin = "";
|
||
}
|
||
|
||
if (this.isIE) {
|
||
var xhr = new XMLHttpRequest();
|
||
xhr.onload = function() {
|
||
var url = URL.createObjectURL(this.response);
|
||
img.src = url;
|
||
};
|
||
xhr.open("GET", this.img, true);
|
||
xhr.responseType = "blob";
|
||
xhr.send();
|
||
} else {
|
||
img.src = this.img;
|
||
}
|
||
},
|
||
// 当按下鼠标键
|
||
startMove(e) {
|
||
e.preventDefault();
|
||
// 如果move 为true 表示当前可以拖动
|
||
if (this.move && !this.crop) {
|
||
if (!this.canMove) {
|
||
return false;
|
||
}
|
||
// 开始移动
|
||
this.moveX = ('clientX' in e ? e.clientX : e.touches[0].clientX) - this.x;
|
||
this.moveY = ('clientY' in e ? e.clientY : e.touches[0].clientY) - this.y;
|
||
if (e.touches) {
|
||
window.addEventListener("touchmove", this.moveImg);
|
||
window.addEventListener("touchend", this.leaveImg);
|
||
if (e.touches.length == 2) {
|
||
// 记录手指刚刚放上去
|
||
this.touches = e.touches;
|
||
window.addEventListener("touchmove", this.touchScale);
|
||
window.addEventListener("touchend", this.cancelTouchScale);
|
||
}
|
||
} else {
|
||
window.addEventListener("mousemove", this.moveImg);
|
||
window.addEventListener("mouseup", this.leaveImg);
|
||
}
|
||
// 触发图片移动事件
|
||
this.$emit("imgMoving", {
|
||
moving: true,
|
||
axis: this.getImgAxis()
|
||
});
|
||
this.$emit("img-moving", {
|
||
moving: true,
|
||
axis: this.getImgAxis()
|
||
});
|
||
} else {
|
||
// 截图ing
|
||
this.cropping = true;
|
||
// 绑定截图事件
|
||
window.addEventListener("mousemove", this.createCrop);
|
||
window.addEventListener("mouseup", this.endCrop);
|
||
window.addEventListener("touchmove", this.createCrop);
|
||
window.addEventListener("touchend", this.endCrop);
|
||
this.cropOffsertX = e.offsetX ?
|
||
e.offsetX :
|
||
e.touches[0].pageX - this.$refs.cropper.offsetLeft;
|
||
this.cropOffsertY = e.offsetY ?
|
||
e.offsetY :
|
||
e.touches[0].pageY - this.$refs.cropper.offsetTop;
|
||
this.cropX = 'clientX' in e ? e.clientX : e.touches[0].clientX;
|
||
this.cropY = 'clientY' in e ? e.clientY : e.touches[0].clientY;
|
||
this.cropChangeX = this.cropOffsertX;
|
||
this.cropChangeY = this.cropOffsertY;
|
||
this.cropW = 0;
|
||
this.cropH = 0;
|
||
}
|
||
},
|
||
|
||
// 移动端缩放
|
||
touchScale(e) {
|
||
e.preventDefault();
|
||
let scale = this.scale;
|
||
// 记录变化量
|
||
// 第一根手指
|
||
var oldTouch1 = {
|
||
x: this.touches[0].clientX,
|
||
y: this.touches[0].clientY
|
||
};
|
||
var newTouch1 = {
|
||
x: e.touches[0].clientX,
|
||
y: e.touches[0].clientY
|
||
};
|
||
// 第二根手指
|
||
var oldTouch2 = {
|
||
x: this.touches[1].clientX,
|
||
y: this.touches[1].clientY
|
||
};
|
||
var newTouch2 = {
|
||
x: e.touches[1].clientX,
|
||
y: e.touches[1].clientY
|
||
};
|
||
var oldL = Math.sqrt(
|
||
Math.pow(oldTouch1.x - oldTouch2.x, 2) +
|
||
Math.pow(oldTouch1.y - oldTouch2.y, 2)
|
||
);
|
||
var newL = Math.sqrt(
|
||
Math.pow(newTouch1.x - newTouch2.x, 2) +
|
||
Math.pow(newTouch1.y - newTouch2.y, 2)
|
||
);
|
||
var cha = newL - oldL;
|
||
// 根据图片本身大小 决定每次改变大小的系数, 图片越大系数越小
|
||
// 1px - 0.2
|
||
var coe = 1;
|
||
coe =
|
||
coe / this.trueWidth > coe / this.trueHeight ?
|
||
coe / this.trueHeight :
|
||
coe / this.trueWidth;
|
||
coe = coe > 0.1 ? 0.1 : coe;
|
||
var num = coe * cha;
|
||
if (!this.touchNow) {
|
||
this.touchNow = true;
|
||
if (cha > 0) {
|
||
scale += Math.abs(num);
|
||
} else if (cha < 0) {
|
||
scale > Math.abs(num) ? (scale -= Math.abs(num)) : scale;
|
||
}
|
||
this.touches = e.touches;
|
||
setTimeout(() => {
|
||
this.touchNow = false;
|
||
}, 8);
|
||
if (!this.checkoutImgAxis(this.x, this.y, scale)) {
|
||
return false;
|
||
}
|
||
this.scale = scale;
|
||
}
|
||
},
|
||
|
||
cancelTouchScale(e) {
|
||
window.removeEventListener("touchmove", this.touchScale);
|
||
},
|
||
|
||
// 移动图片
|
||
moveImg(e) {
|
||
e.preventDefault();
|
||
if (e.touches && e.touches.length === 2) {
|
||
this.touches = e.touches;
|
||
window.addEventListener("touchmove", this.touchScale);
|
||
window.addEventListener("touchend", this.cancelTouchScale);
|
||
window.removeEventListener("touchmove", this.moveImg);
|
||
return false;
|
||
}
|
||
let nowX = 'clientX' in e ? e.clientX : e.touches[0].clientX;
|
||
let nowY = 'clientY' in e ? e.clientY : e.touches[0].clientY;
|
||
|
||
let changeX, changeY;
|
||
changeX = nowX - this.moveX;
|
||
changeY = nowY - this.moveY;
|
||
|
||
this.$nextTick(() => {
|
||
if (this.centerBox) {
|
||
let axis = this.getImgAxis(changeX, changeY, this.scale);
|
||
let cropAxis = this.getCropAxis();
|
||
let imgW = this.trueHeight * this.scale;
|
||
let imgH = this.trueWidth * this.scale;
|
||
let maxLeft, maxTop, maxRight, maxBottom;
|
||
switch (this.rotate) {
|
||
case 1:
|
||
case -1:
|
||
case 3:
|
||
case -3:
|
||
maxLeft =
|
||
this.cropOffsertX -
|
||
(this.trueWidth * (1 - this.scale)) / 2 +
|
||
(imgW - imgH) / 2;
|
||
maxTop =
|
||
this.cropOffsertY -
|
||
(this.trueHeight * (1 - this.scale)) / 2 +
|
||
(imgH - imgW) / 2;
|
||
maxRight = maxLeft - imgW + this.cropW;
|
||
maxBottom = maxTop - imgH + this.cropH;
|
||
break;
|
||
default:
|
||
maxLeft =
|
||
this.cropOffsertX - (this.trueWidth * (1 - this.scale)) / 2;
|
||
maxTop =
|
||
this.cropOffsertY - (this.trueHeight * (1 - this.scale)) / 2;
|
||
maxRight = maxLeft - imgH + this.cropW;
|
||
maxBottom = maxTop - imgW + this.cropH;
|
||
break;
|
||
}
|
||
|
||
// 图片左边 图片不能超过截图框
|
||
if (axis.x1 >= cropAxis.x1) {
|
||
changeX = maxLeft;
|
||
}
|
||
|
||
// 图片上边 图片不能超过截图框
|
||
if (axis.y1 >= cropAxis.y1) {
|
||
changeY = maxTop;
|
||
}
|
||
|
||
// 图片右边
|
||
if (axis.x2 <= cropAxis.x2) {
|
||
changeX = maxRight;
|
||
}
|
||
|
||
// 图片下边
|
||
if (axis.y2 <= cropAxis.y2) {
|
||
changeY = maxBottom;
|
||
}
|
||
}
|
||
this.x = changeX;
|
||
this.y = changeY;
|
||
// 触发图片移动事件
|
||
this.$emit("imgMoving", {
|
||
moving: true,
|
||
axis: this.getImgAxis()
|
||
});
|
||
this.$emit("img-moving", {
|
||
moving: true,
|
||
axis: this.getImgAxis()
|
||
});
|
||
});
|
||
},
|
||
// 移动图片结束
|
||
leaveImg(e) {
|
||
window.removeEventListener("mousemove", this.moveImg);
|
||
window.removeEventListener("touchmove", this.moveImg);
|
||
window.removeEventListener("mouseup", this.leaveImg);
|
||
window.removeEventListener("touchend", this.leaveImg);
|
||
// 触发图片移动事件
|
||
this.$emit("imgMoving", {
|
||
moving: false,
|
||
axis: this.getImgAxis()
|
||
});
|
||
this.$emit("img-moving", {
|
||
moving: false,
|
||
axis: this.getImgAxis()
|
||
});
|
||
},
|
||
// 缩放图片
|
||
scaleImg() {
|
||
if (this.canScale) {
|
||
window.addEventListener(this.support, this.changeSize, this.passive);
|
||
}
|
||
},
|
||
// 移出框
|
||
cancelScale() {
|
||
if (this.canScale) {
|
||
window.removeEventListener(this.support, this.changeSize);
|
||
}
|
||
},
|
||
// 改变大小函数
|
||
changeSize(e) {
|
||
e.preventDefault();
|
||
let scale = this.scale;
|
||
var change = e.deltaY || e.wheelDelta;
|
||
// 根据图片本身大小 决定每次改变大小的系数, 图片越大系数越小
|
||
var isFirefox = navigator.userAgent.indexOf("Firefox");
|
||
change = isFirefox > 0 ? change * 30 : change;
|
||
// 修复ie的滚动缩放
|
||
if (this.isIE) {
|
||
change = -change;
|
||
}
|
||
// 1px - 0.2
|
||
var coe = this.coe;
|
||
coe =
|
||
coe / this.trueWidth > coe / this.trueHeight ?
|
||
coe / this.trueHeight :
|
||
coe / this.trueWidth;
|
||
var num = coe * change;
|
||
num < 0 ?
|
||
(scale += Math.abs(num)) :
|
||
scale > Math.abs(num) ?
|
||
(scale -= Math.abs(num)) :
|
||
scale;
|
||
// 延迟0.1s 每次放大大或者缩小的范围
|
||
let status = num < 0 ? "add" : "reduce";
|
||
if (status !== this.coeStatus) {
|
||
this.coeStatus = status;
|
||
this.coe = 0.2;
|
||
}
|
||
if (!this.scaling) {
|
||
this.scalingSet = setTimeout(() => {
|
||
this.scaling = false;
|
||
this.coe = this.coe += 0.01;
|
||
}, 50);
|
||
}
|
||
this.scaling = true;
|
||
if (!this.checkoutImgAxis(this.x, this.y, scale)) {
|
||
return false;
|
||
}
|
||
this.scale = scale;
|
||
},
|
||
|
||
// 修改图片大小函数
|
||
changeScale(num) {
|
||
let scale = this.scale;
|
||
num = num || 1;
|
||
var coe = 20;
|
||
coe =
|
||
coe / this.trueWidth > coe / this.trueHeight ?
|
||
coe / this.trueHeight :
|
||
coe / this.trueWidth;
|
||
num = num * coe;
|
||
num > 0 ?
|
||
(scale += Math.abs(num)) :
|
||
scale > Math.abs(num) ?
|
||
(scale -= Math.abs(num)) :
|
||
scale;
|
||
if (!this.checkoutImgAxis(this.x, this.y, scale)) {
|
||
return false;
|
||
}
|
||
this.scale = scale;
|
||
},
|
||
// 创建截图框
|
||
createCrop(e) {
|
||
e.preventDefault();
|
||
// 移动生成大小
|
||
var nowX = 'clientX' in e ? e.clientX : e.touches ? e.touches[0].clientX : 0;
|
||
var nowY = 'clientY' in e ? e.clientY : e.touches ? e.touches[0].clientY : 0;
|
||
this.$nextTick(() => {
|
||
var fw = nowX - this.cropX;
|
||
var fh = nowY - this.cropY;
|
||
if (fw > 0) {
|
||
this.cropW =
|
||
fw + this.cropChangeX > this.w ? this.w - this.cropChangeX : fw;
|
||
this.cropOffsertX = this.cropChangeX;
|
||
} else {
|
||
this.cropW =
|
||
this.w - this.cropChangeX + Math.abs(fw) > this.w ?
|
||
this.cropChangeX :
|
||
Math.abs(fw);
|
||
this.cropOffsertX =
|
||
this.cropChangeX + fw > 0 ? this.cropChangeX + fw : 0;
|
||
}
|
||
|
||
if (!this.fixed) {
|
||
if (fh > 0) {
|
||
this.cropH =
|
||
fh + this.cropChangeY > this.h ? this.h - this.cropChangeY : fh;
|
||
this.cropOffsertY = this.cropChangeY;
|
||
} else {
|
||
this.cropH =
|
||
this.h - this.cropChangeY + Math.abs(fh) > this.h ?
|
||
this.cropChangeY :
|
||
Math.abs(fh);
|
||
this.cropOffsertY =
|
||
this.cropChangeY + fh > 0 ? this.cropChangeY + fh : 0;
|
||
}
|
||
} else {
|
||
var fixedHeight =
|
||
(this.cropW / this.fixedNumber[0]) * this.fixedNumber[1];
|
||
if (fixedHeight + this.cropOffsertY > this.h) {
|
||
this.cropH = this.h - this.cropOffsertY;
|
||
this.cropW =
|
||
(this.cropH / this.fixedNumber[1]) * this.fixedNumber[0];
|
||
if (fw > 0) {
|
||
this.cropOffsertX = this.cropChangeX;
|
||
} else {
|
||
this.cropOffsertX = this.cropChangeX - this.cropW;
|
||
}
|
||
} else {
|
||
this.cropH = fixedHeight;
|
||
}
|
||
this.cropOffsertY = this.cropOffsertY;
|
||
}
|
||
});
|
||
},
|
||
|
||
// 改变截图框大小
|
||
changeCropSize(e, w, h, typeW, typeH) {
|
||
e.preventDefault();
|
||
window.addEventListener("mousemove", this.changeCropNow);
|
||
window.addEventListener("mouseup", this.changeCropEnd);
|
||
window.addEventListener("touchmove", this.changeCropNow);
|
||
window.addEventListener("touchend", this.changeCropEnd);
|
||
this.canChangeX = w;
|
||
this.canChangeY = h;
|
||
this.changeCropTypeX = typeW;
|
||
this.changeCropTypeY = typeH;
|
||
this.cropX = 'clientX' in e ? e.clientX : e.touches[0].clientX;
|
||
this.cropY = 'clientY' in e ? e.clientY : e.touches[0].clientY;
|
||
this.cropOldW = this.cropW;
|
||
this.cropOldH = this.cropH;
|
||
this.cropChangeX = this.cropOffsertX;
|
||
this.cropChangeY = this.cropOffsertY;
|
||
if (this.fixed) {
|
||
if (this.canChangeX && this.canChangeY) {
|
||
this.canChangeY = 0;
|
||
}
|
||
}
|
||
this.$emit('change-crop-size', {
|
||
width: this.cropW,
|
||
height: this.cropH
|
||
})
|
||
},
|
||
|
||
// 正在改变
|
||
changeCropNow(e) {
|
||
e.preventDefault();
|
||
var nowX = 'clientX' in e ? e.clientX : e.touches ? e.touches[0].clientX : 0;
|
||
var nowY = 'clientY' in e ? e.clientY : e.touches ? e.touches[0].clientY : 0;
|
||
// 容器的宽高
|
||
let wrapperW = this.w;
|
||
let wrapperH = this.h;
|
||
|
||
// 不能超过的坐标轴
|
||
let minX = 0;
|
||
let minY = 0;
|
||
|
||
if (this.centerBox) {
|
||
let axis = this.getImgAxis();
|
||
let imgW = axis.x2;
|
||
let imgH = axis.y2;
|
||
minX = axis.x1 > 0 ? axis.x1 : 0;
|
||
minY = axis.y1 > 0 ? axis.y1 : 0;
|
||
if (wrapperW > imgW) {
|
||
wrapperW = imgW;
|
||
}
|
||
|
||
if (wrapperH > imgH) {
|
||
wrapperH = imgH;
|
||
}
|
||
}
|
||
|
||
this.$nextTick(() => {
|
||
var fw = nowX - this.cropX;
|
||
var fh = nowY - this.cropY;
|
||
if (this.canChangeX) {
|
||
if (this.changeCropTypeX === 1) {
|
||
if (this.cropOldW - fw > 0) {
|
||
this.cropW =
|
||
wrapperW - this.cropChangeX - fw <= wrapperW - minX ?
|
||
this.cropOldW - fw :
|
||
this.cropOldW + this.cropChangeX - minX;
|
||
this.cropOffsertX =
|
||
wrapperW - this.cropChangeX - fw <= wrapperW - minX ?
|
||
this.cropChangeX + fw :
|
||
minX;
|
||
} else {
|
||
this.cropW =
|
||
Math.abs(fw) + this.cropChangeX <= wrapperW ?
|
||
Math.abs(fw) - this.cropOldW :
|
||
wrapperW - this.cropOldW - this.cropChangeX;
|
||
this.cropOffsertX = this.cropChangeX + this.cropOldW;
|
||
}
|
||
} else if (this.changeCropTypeX === 2) {
|
||
if (this.cropOldW + fw > 0) {
|
||
this.cropW =
|
||
this.cropOldW + fw + this.cropOffsertX <= wrapperW ?
|
||
this.cropOldW + fw :
|
||
wrapperW - this.cropOffsertX;
|
||
this.cropOffsertX = this.cropChangeX;
|
||
} else {
|
||
// 右侧坐标抽 超过左侧
|
||
this.cropW =
|
||
wrapperW - this.cropChangeX + Math.abs(fw + this.cropOldW) <=
|
||
wrapperW - minX ?
|
||
Math.abs(fw + this.cropOldW) :
|
||
this.cropChangeX - minX;
|
||
this.cropOffsertX =
|
||
wrapperW - this.cropChangeX + Math.abs(fw + this.cropOldW) <=
|
||
wrapperW - minX ?
|
||
this.cropChangeX - Math.abs(fw + this.cropOldW) :
|
||
minX;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (this.canChangeY) {
|
||
if (this.changeCropTypeY === 1) {
|
||
if (this.cropOldH - fh > 0) {
|
||
this.cropH =
|
||
wrapperH - this.cropChangeY - fh <= wrapperH - minY ?
|
||
this.cropOldH - fh :
|
||
this.cropOldH + this.cropChangeY - minY;
|
||
this.cropOffsertY =
|
||
wrapperH - this.cropChangeY - fh <= wrapperH - minY ?
|
||
this.cropChangeY + fh :
|
||
minY;
|
||
} else {
|
||
this.cropH =
|
||
Math.abs(fh) + this.cropChangeY <= wrapperH ?
|
||
Math.abs(fh) - this.cropOldH :
|
||
wrapperH - this.cropOldH - this.cropChangeY;
|
||
this.cropOffsertY = this.cropChangeY + this.cropOldH;
|
||
}
|
||
} else if (this.changeCropTypeY === 2) {
|
||
if (this.cropOldH + fh > 0) {
|
||
this.cropH =
|
||
this.cropOldH + fh + this.cropOffsertY <= wrapperH ?
|
||
this.cropOldH + fh :
|
||
wrapperH - this.cropOffsertY;
|
||
this.cropOffsertY = this.cropChangeY;
|
||
} else {
|
||
this.cropH =
|
||
wrapperH - this.cropChangeY + Math.abs(fh + this.cropOldH) <=
|
||
wrapperH - minY ?
|
||
Math.abs(fh + this.cropOldH) :
|
||
this.cropChangeY - minY;
|
||
this.cropOffsertY =
|
||
wrapperH - this.cropChangeY + Math.abs(fh + this.cropOldH) <=
|
||
wrapperH - minY ?
|
||
this.cropChangeY - Math.abs(fh + this.cropOldH) :
|
||
minY;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (this.canChangeX && this.fixed) {
|
||
var fixedHeight =
|
||
(this.cropW / this.fixedNumber[0]) * this.fixedNumber[1];
|
||
if (fixedHeight + this.cropOffsertY > wrapperH) {
|
||
this.cropH = wrapperH - this.cropOffsertY;
|
||
this.cropW =
|
||
(this.cropH / this.fixedNumber[1]) * this.fixedNumber[0];
|
||
} else {
|
||
this.cropH = fixedHeight;
|
||
}
|
||
}
|
||
|
||
if (this.canChangeY && this.fixed) {
|
||
var fixedWidth =
|
||
(this.cropH / this.fixedNumber[1]) * this.fixedNumber[0];
|
||
if (fixedWidth + this.cropOffsertX > wrapperW) {
|
||
this.cropW = wrapperW - this.cropOffsertX;
|
||
this.cropH =
|
||
(this.cropW / this.fixedNumber[0]) * this.fixedNumber[1];
|
||
} else {
|
||
this.cropW = fixedWidth;
|
||
}
|
||
}
|
||
// 触发截图框改变大小事件
|
||
this.$emit('crop-sizing', {
|
||
cropW: this.cropW,
|
||
cropH: this.cropH
|
||
})
|
||
});
|
||
},
|
||
|
||
checkCropLimitSize() {
|
||
let {
|
||
cropW,
|
||
cropH,
|
||
limitMinSize
|
||
} = this;
|
||
|
||
let limitMinNum = new Array;
|
||
if (!Array.isArray[limitMinSize]) {
|
||
limitMinNum = [limitMinSize, limitMinSize]
|
||
} else {
|
||
limitMinNum = limitMinSize
|
||
}
|
||
|
||
//限制最小宽度和高度
|
||
cropW = parseFloat(limitMinNum[0])
|
||
cropH = parseFloat(limitMinNum[1])
|
||
return [cropW, cropH]
|
||
},
|
||
// 结束改变
|
||
changeCropEnd(e) {
|
||
window.removeEventListener("mousemove", this.changeCropNow);
|
||
window.removeEventListener("mouseup", this.changeCropEnd);
|
||
window.removeEventListener("touchmove", this.changeCropNow);
|
||
window.removeEventListener("touchend", this.changeCropEnd);
|
||
},
|
||
|
||
// 创建完成
|
||
endCrop() {
|
||
if (this.cropW === 0 && this.cropH === 0) {
|
||
this.cropping = false;
|
||
}
|
||
window.removeEventListener("mousemove", this.createCrop);
|
||
window.removeEventListener("mouseup", this.endCrop);
|
||
window.removeEventListener("touchmove", this.createCrop);
|
||
window.removeEventListener("touchend", this.endCrop);
|
||
},
|
||
// 开始截图
|
||
startCrop() {
|
||
this.crop = true;
|
||
},
|
||
// 停止截图
|
||
stopCrop() {
|
||
this.crop = false;
|
||
},
|
||
// 清除截图
|
||
clearCrop() {
|
||
this.cropping = false;
|
||
this.cropW = 0;
|
||
this.cropH = 0;
|
||
},
|
||
// 截图移动
|
||
cropMove(e) {
|
||
e.preventDefault();
|
||
if (!this.canMoveBox) {
|
||
this.crop = false;
|
||
this.startMove(e);
|
||
return false;
|
||
}
|
||
|
||
if (e.touches && e.touches.length === 2) {
|
||
this.crop = false;
|
||
this.startMove(e);
|
||
this.leaveCrop();
|
||
return false;
|
||
}
|
||
window.addEventListener("mousemove", this.moveCrop);
|
||
window.addEventListener("mouseup", this.leaveCrop);
|
||
window.addEventListener("touchmove", this.moveCrop);
|
||
window.addEventListener("touchend", this.leaveCrop);
|
||
let x = 'clientX' in e ? e.clientX : e.touches[0].clientX;
|
||
let y = 'clientY' in e ? e.clientY : e.touches[0].clientY;
|
||
let newX, newY;
|
||
newX = x - this.cropOffsertX;
|
||
newY = y - this.cropOffsertY;
|
||
this.cropX = newX;
|
||
this.cropY = newY;
|
||
// 触发截图框移动事件
|
||
this.$emit("cropMoving", {
|
||
moving: true,
|
||
axis: this.getCropAxis()
|
||
});
|
||
this.$emit("crop-moving", {
|
||
moving: true,
|
||
axis: this.getCropAxis()
|
||
});
|
||
},
|
||
|
||
moveCrop(e, isMove) {
|
||
let nowX = 0;
|
||
let nowY = 0;
|
||
if (e) {
|
||
e.preventDefault();
|
||
nowX = 'clientX' in e ? e.clientX : e.touches[0].clientX;
|
||
nowY = 'clientY' in e ? e.clientY : e.touches[0].clientY;
|
||
}
|
||
this.$nextTick(() => {
|
||
let cx, cy;
|
||
let fw = nowX - this.cropX;
|
||
let fh = nowY - this.cropY;
|
||
if (isMove) {
|
||
fw = this.cropOffsertX;
|
||
fh = this.cropOffsertY;
|
||
}
|
||
// 不能超过外层容器
|
||
if (fw <= 0) {
|
||
cx = 0;
|
||
} else if (fw + this.cropW > this.w) {
|
||
cx = this.w - this.cropW;
|
||
} else {
|
||
cx = fw;
|
||
}
|
||
|
||
if (fh <= 0) {
|
||
cy = 0;
|
||
} else if (fh + this.cropH > this.h) {
|
||
cy = this.h - this.cropH;
|
||
} else {
|
||
cy = fh;
|
||
}
|
||
|
||
// 不能超过图片
|
||
if (this.centerBox) {
|
||
let axis = this.getImgAxis();
|
||
// 横坐标判断
|
||
if (cx <= axis.x1) {
|
||
cx = axis.x1;
|
||
}
|
||
|
||
if (cx + this.cropW > axis.x2) {
|
||
cx = axis.x2 - this.cropW;
|
||
}
|
||
|
||
// 纵坐标纵轴
|
||
if (cy <= axis.y1) {
|
||
cy = axis.y1;
|
||
}
|
||
|
||
if (cy + this.cropH > axis.y2) {
|
||
cy = axis.y2 - this.cropH;
|
||
}
|
||
}
|
||
|
||
this.cropOffsertX = cx;
|
||
this.cropOffsertY = cy;
|
||
|
||
// 触发截图框移动事件
|
||
this.$emit("cropMoving", {
|
||
moving: true,
|
||
axis: this.getCropAxis()
|
||
});
|
||
this.$emit("crop-moving", {
|
||
moving: true,
|
||
axis: this.getCropAxis()
|
||
});
|
||
});
|
||
},
|
||
|
||
// 算出不同场景下面 图片相对于外层容器的坐标轴
|
||
getImgAxis(x, y, scale) {
|
||
x = x || this.x;
|
||
y = y || this.y;
|
||
scale = scale || this.scale;
|
||
// 如果设置了截图框在图片内， 那么限制截图框不能超过图片的坐标
|
||
// 图片的坐标
|
||
let obj = {
|
||
x1: 0,
|
||
x2: 0,
|
||
y1: 0,
|
||
y2: 0
|
||
};
|
||
let imgW = this.trueWidth * scale;
|
||
let imgH = this.trueHeight * scale;
|
||
switch (this.rotate) {
|
||
case 0:
|
||
obj.x1 = x + (this.trueWidth * (1 - scale)) / 2;
|
||
obj.x2 = obj.x1 + this.trueWidth * scale;
|
||
obj.y1 = y + (this.trueHeight * (1 - scale)) / 2;
|
||
obj.y2 = obj.y1 + this.trueHeight * scale;
|
||
break;
|
||
case 1:
|
||
case -1:
|
||
case 3:
|
||
case -3:
|
||
obj.x1 = x + (this.trueWidth * (1 - scale)) / 2 + (imgW - imgH) / 2;
|
||
obj.x2 = obj.x1 + this.trueHeight * scale;
|
||
obj.y1 = y + (this.trueHeight * (1 - scale)) / 2 + (imgH - imgW) / 2;
|
||
obj.y2 = obj.y1 + this.trueWidth * scale;
|
||
break;
|
||
default:
|
||
obj.x1 = x + (this.trueWidth * (1 - scale)) / 2;
|
||
obj.x2 = obj.x1 + this.trueWidth * scale;
|
||
obj.y1 = y + (this.trueHeight * (1 - scale)) / 2;
|
||
obj.y2 = obj.y1 + this.trueHeight * scale;
|
||
break;
|
||
}
|
||
return obj;
|
||
},
|
||
|
||
// 获取截图框的坐标轴
|
||
getCropAxis() {
|
||
let obj = {
|
||
x1: 0,
|
||
x2: 0,
|
||
y1: 0,
|
||
y2: 0
|
||
};
|
||
obj.x1 = this.cropOffsertX;
|
||
obj.x2 = obj.x1 + this.cropW;
|
||
obj.y1 = this.cropOffsertY;
|
||
obj.y2 = obj.y1 + this.cropH;
|
||
return obj;
|
||
},
|
||
|
||
leaveCrop(e) {
|
||
window.removeEventListener("mousemove", this.moveCrop);
|
||
window.removeEventListener("mouseup", this.leaveCrop);
|
||
window.removeEventListener("touchmove", this.moveCrop);
|
||
window.removeEventListener("touchend", this.leaveCrop);
|
||
// 触发截图框移动事件
|
||
this.$emit("cropMoving", {
|
||
moving: false,
|
||
axis: this.getCropAxis()
|
||
});
|
||
this.$emit("crop-moving", {
|
||
moving: false,
|
||
axis: this.getCropAxis()
|
||
});
|
||
},
|
||
|
||
getCropChecked(cb) {
|
||
let canvas = document.createElement("canvas");
|
||
let img = new Image();
|
||
let rotate = this.rotate;
|
||
let trueWidth = this.trueWidth;
|
||
let trueHeight = this.trueHeight;
|
||
let cropOffsertX = this.cropOffsertX;
|
||
let cropOffsertY = this.cropOffsertY;
|
||
img.onload = () => {
|
||
if (this.cropW !== 0) {
|
||
let ctx = canvas.getContext("2d");
|
||
let dpr = 1;
|
||
if (this.high & !this.full) {
|
||
dpr = window.devicePixelRatio;
|
||
}
|
||
if ((this.enlarge !== 1) & !this.full) {
|
||
dpr = Math.abs(Number(this.enlarge));
|
||
}
|
||
let width = this.cropW * dpr;
|
||
let height = this.cropH * dpr;
|
||
let imgW = trueWidth * this.scale * dpr;
|
||
let imgH = trueHeight * this.scale * dpr;
|
||
// 图片x轴偏移
|
||
let dx =
|
||
(this.x - cropOffsertX + (this.trueWidth * (1 - this.scale)) / 2) *
|
||
dpr;
|
||
// 图片y轴偏移
|
||
let dy =
|
||
(this.y - cropOffsertY + (this.trueHeight * (1 - this.scale)) / 2) *
|
||
dpr;
|
||
//保存状态
|
||
setCanvasSize(width, height);
|
||
ctx.save();
|
||
switch (rotate) {
|
||
case 0:
|
||
if (!this.full) {
|
||
ctx.drawImage(img, dx, dy, imgW, imgH);
|
||
} else {
|
||
// 输出原图比例截图
|
||
setCanvasSize(width / this.scale, height / this.scale);
|
||
ctx.drawImage(
|
||
img,
|
||
dx / this.scale,
|
||
dy / this.scale,
|
||
imgW / this.scale,
|
||
imgH / this.scale
|
||
);
|
||
}
|
||
break;
|
||
case 1:
|
||
case -3:
|
||
if (!this.full) {
|
||
// 换算图片旋转后的坐标弥补
|
||
dx = dx + (imgW - imgH) / 2;
|
||
dy = dy + (imgH - imgW) / 2;
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(img, dy, -dx - imgH, imgW, imgH);
|
||
} else {
|
||
setCanvasSize(width / this.scale, height / this.scale);
|
||
// 换算图片旋转后的坐标弥补
|
||
dx =
|
||
dx / this.scale + (imgW / this.scale - imgH / this.scale) / 2;
|
||
dy =
|
||
dy / this.scale + (imgH / this.scale - imgW / this.scale) / 2;
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(
|
||
img,
|
||
dy,
|
||
-dx - imgH / this.scale,
|
||
imgW / this.scale,
|
||
imgH / this.scale
|
||
);
|
||
}
|
||
break;
|
||
case 2:
|
||
case -2:
|
||
if (!this.full) {
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(img, -dx - imgW, -dy - imgH, imgW, imgH);
|
||
} else {
|
||
setCanvasSize(width / this.scale, height / this.scale);
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
dx = dx / this.scale;
|
||
dy = dy / this.scale;
|
||
ctx.drawImage(
|
||
img,
|
||
-dx - imgW / this.scale,
|
||
-dy - imgH / this.scale,
|
||
imgW / this.scale,
|
||
imgH / this.scale
|
||
);
|
||
}
|
||
break;
|
||
case 3:
|
||
case -1:
|
||
if (!this.full) {
|
||
// 换算图片旋转后的坐标弥补
|
||
dx = dx + (imgW - imgH) / 2;
|
||
dy = dy + (imgH - imgW) / 2;
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(img, -dy - imgW, dx, imgW, imgH);
|
||
} else {
|
||
setCanvasSize(width / this.scale, height / this.scale);
|
||
// 换算图片旋转后的坐标弥补
|
||
dx =
|
||
dx / this.scale + (imgW / this.scale - imgH / this.scale) / 2;
|
||
dy =
|
||
dy / this.scale + (imgH / this.scale - imgW / this.scale) / 2;
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(
|
||
img,
|
||
-dy - imgW / this.scale,
|
||
dx,
|
||
imgW / this.scale,
|
||
imgH / this.scale
|
||
);
|
||
}
|
||
break;
|
||
default:
|
||
if (!this.full) {
|
||
ctx.drawImage(img, dx, dy, imgW, imgH);
|
||
} else {
|
||
// 输出原图比例截图
|
||
setCanvasSize(width / this.scale, height / this.scale);
|
||
ctx.drawImage(
|
||
img,
|
||
dx / this.scale,
|
||
dy / this.scale,
|
||
imgW / this.scale,
|
||
imgH / this.scale
|
||
);
|
||
}
|
||
}
|
||
ctx.restore();
|
||
} else {
|
||
let width = trueWidth * this.scale;
|
||
let height = trueHeight * this.scale;
|
||
let ctx = canvas.getContext("2d");
|
||
ctx.save();
|
||
switch (rotate) {
|
||
case 0:
|
||
setCanvasSize(width, height);
|
||
ctx.drawImage(img, 0, 0, width, height);
|
||
break;
|
||
case 1:
|
||
case -3:
|
||
// 旋转90度 或者-270度 宽度和高度对调
|
||
setCanvasSize(height, width);
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(img, 0, -height, width, height);
|
||
break;
|
||
case 2:
|
||
case -2:
|
||
setCanvasSize(width, height);
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(img, -width, -height, width, height);
|
||
break;
|
||
case 3:
|
||
case -1:
|
||
setCanvasSize(height, width);
|
||
ctx.rotate((rotate * 90 * Math.PI) / 180);
|
||
ctx.drawImage(img, -width, 0, width, height);
|
||
break;
|
||
default:
|
||
setCanvasSize(width, height);
|
||
ctx.drawImage(img, 0, 0, width, height);
|
||
}
|
||
ctx.restore();
|
||
}
|
||
cb(canvas);
|
||
};
|
||
// 判断图片是否是base64
|
||
var s = this.img.substr(0, 4);
|
||
if (s !== "data") {
|
||
img.crossOrigin = "Anonymous";
|
||
}
|
||
img.src = this.imgs;
|
||
|
||
function setCanvasSize(width, height) {
|
||
canvas.width = Math.round(width);
|
||
canvas.height = Math.round(height);
|
||
}
|
||
},
|
||
|
||
// 获取转换成base64 的图片信息
|
||
getCropData(cb) {
|
||
this.getCropChecked(data => {
|
||
cb(data.toDataURL("image/" + this.outputType, this.outputSize));
|
||
});
|
||
},
|
||
|
||
//canvas获取为blob对象
|
||
getCropBlob(cb) {
|
||
this.getCropChecked(data => {
|
||
data.toBlob(
|
||
blob => cb(blob),
|
||
"image/" + this.outputType,
|
||
this.outputSize
|
||
);
|
||
});
|
||
},
|
||
|
||
// 自动预览函数
|
||
showPreview() {
|
||
// 优化不要多次触发
|
||
if (this.isCanShow) {
|
||
this.isCanShow = false;
|
||
setTimeout(() => {
|
||
this.isCanShow = true;
|
||
}, 16);
|
||
} else {
|
||
return false;
|
||
}
|
||
let w = this.cropW;
|
||
let h = this.cropH;
|
||
let scale = this.scale;
|
||
var obj = {};
|
||
obj.div = {
|
||
width: `${w}px`,
|
||
height: `${h}px`
|
||
};
|
||
let transformX = (this.x - this.cropOffsertX) / scale;
|
||
let transformY = (this.y - this.cropOffsertY) / scale;
|
||
let transformZ = 0;
|
||
obj.w = w;
|
||
obj.h = h;
|
||
obj.url = this.imgs;
|
||
obj.img = {
|
||
width: `${this.trueWidth}px`,
|
||
height: `${this.trueHeight}px`,
|
||
transform: `scale(${scale})translate3d(${transformX}px, ${transformY}px, ${transformZ}px)rotateZ(${this
|
||
.rotate * 90}deg)`
|
||
};
|
||
obj.html = `
|
||
<div class="show-preview" style="width: ${obj.w}px; height: ${
|
||
obj.h
|
||
}px,; overflow: hidden">
|
||
<div style="width: ${w}px; height: ${h}px">
|
||
<img src=${obj.url} style="width: ${this.trueWidth}px; height: ${
|
||
this.trueHeight
|
||
}px; transform:
|
||
scale(${scale})translate3d(${transformX}px, ${transformY}px, ${transformZ}px)rotateZ(${this
|
||
.rotate * 90}deg)">
|
||
</div>
|
||
</div>`;
|
||
this.$emit("realTime", obj);
|
||
this.$emit("real-time", obj);
|
||
},
|
||
// reload 图片布局函数
|
||
reload() {
|
||
let img = new Image();
|
||
img.onload = () => {
|
||
// 读取图片的信息原始信息， 解析是否需要旋转
|
||
// 读取图片的旋转信息
|
||
// 得到外层容器的宽度高度
|
||
this.w = parseFloat(window.getComputedStyle(this.$refs.cropper).width);
|
||
this.h = parseFloat(window.getComputedStyle(this.$refs.cropper).height);
|
||
|
||
// 存入图片真实高度
|
||
this.trueWidth = img.width;
|
||
this.trueHeight = img.height;
|
||
|
||
// 判断是否需要压缩大图
|
||
if (!this.original) {
|
||
// 判断布局方式 mode
|
||
this.scale = this.checkedMode();
|
||
} else {
|
||
this.scale = 1;
|
||
}
|
||
|
||
this.$nextTick(() => {
|
||
this.x = -(this.trueWidth - this.trueWidth * this.scale) / 2 +
|
||
(this.w - this.trueWidth * this.scale) / 2;
|
||
this.y = -(this.trueHeight - this.trueHeight * this.scale) / 2 +
|
||
(this.h - this.trueHeight * this.scale) / 2;
|
||
this.loading = false;
|
||
// // 获取是否开启了自动截图
|
||
if (this.autoCrop) {
|
||
this.goAutoCrop();
|
||
}
|
||
// 图片加载成功的回调
|
||
this.$emit("img-load", "success");
|
||
this.$emit("imgLoad", "success");
|
||
setTimeout(() => {
|
||
this.showPreview();
|
||
}, 20);
|
||
});
|
||
};
|
||
img.onerror = () => {
|
||
this.$emit("imgLoad", "error");
|
||
this.$emit("img-load", "error");
|
||
};
|
||
img.src = this.imgs;
|
||
},
|
||
// 背景布局的函数
|
||
checkedMode() {
|
||
let scale = 1;
|
||
// 通过字符串分割
|
||
let imgW = this.trueWidth;
|
||
let imgH = this.trueHeight;
|
||
const arr = this.mode.split(" ");
|
||
switch (arr[0]) {
|
||
case "contain":
|
||
if (this.trueWidth > this.w) {
|
||
// 如果图片宽度大于容器宽度
|
||
scale = this.w / this.trueWidth;
|
||
}
|
||
|
||
if (this.trueHeight * scale > this.h) {
|
||
scale = this.h / this.trueHeight;
|
||
}
|
||
break;
|
||
case "cover":
|
||
// 扩展布局 默认填充满整个容器
|
||
// 图片宽度大于容器
|
||
imgW = this.w;
|
||
scale = imgW / this.trueWidth;
|
||
imgH = imgH * scale;
|
||
// 如果扩展之后高度小于容器的外层高度 继续扩展高度
|
||
if (imgH < this.h) {
|
||
imgH = this.h;
|
||
scale = imgH / this.trueHeight;
|
||
}
|
||
break;
|
||
default:
|
||
try {
|
||
let str = arr[0];
|
||
if (str.search("px") !== -1) {
|
||
str = str.replace("px", "");
|
||
imgW = parseFloat(str);
|
||
const scaleX = imgW / this.trueWidth;
|
||
let scaleY = 1;
|
||
let strH = arr[1];
|
||
if (strH.search("px") !== -1) {
|
||
strH = strH.replace("px", "");
|
||
imgH = parseFloat(strH);
|
||
scaleY = imgH / this.trueHeight;
|
||
}
|
||
scale = Math.min(scaleX, scaleY)
|
||
|
||
}
|
||
if (str.search("%") !== -1) {
|
||
str = str.replace("%", "");
|
||
imgW = (parseFloat(str) / 100) * this.w;
|
||
scale = imgW / this.trueWidth;
|
||
}
|
||
|
||
if (arr.length === 2 && str === "auto") {
|
||
let str2 = arr[1];
|
||
if (str2.search("px") !== -1) {
|
||
str2 = str2.replace("px", "");
|
||
imgH = parseFloat(str2);
|
||
scale = imgH / this.trueHeight;
|
||
}
|
||
if (str2.search("%") !== -1) {
|
||
str2 = str2.replace("%", "");
|
||
imgH = (parseFloat(str2) / 100) * this.h;
|
||
scale = imgH / this.trueHeight;
|
||
}
|
||
}
|
||
} catch (error) {
|
||
scale = 1;
|
||
}
|
||
}
|
||
return scale;
|
||
},
|
||
// 自动截图函数
|
||
goAutoCrop(cw, ch) {
|
||
if (this.imgs === '' || this.imgs === null) return
|
||
this.clearCrop();
|
||
this.cropping = true;
|
||
let maxWidth = this.w;
|
||
let maxHeight = this.h;
|
||
if (this.centerBox) {
|
||
const switchWH = Math.abs(this.rotate) % 2 > 0
|
||
let imgW = (switchWH ? this.trueHeight : this.trueWidth) * this.scale;
|
||
let imgH = (switchWH ? this.trueWidth : this.trueHeight) * this.scale;
|
||
maxWidth = imgW < maxWidth ? imgW : maxWidth;
|
||
maxHeight = imgH < maxHeight ? imgH : maxHeight;
|
||
}
|
||
// 截图框默认大小
|
||
// 如果为0 那么计算容器大小 默认为80%
|
||
var w = cw ? cw : parseFloat(this.autoCropWidth);
|
||
var h = ch ? ch : parseFloat(this.autoCropHeight);
|
||
if (w === 0 || h === 0) {
|
||
w = maxWidth * 0.8;
|
||
h = maxHeight * 0.8;
|
||
}
|
||
w = w > maxWidth ? maxWidth : w;
|
||
h = h > maxHeight ? maxHeight : h;
|
||
if (this.fixed) {
|
||
h = (w / this.fixedNumber[0]) * this.fixedNumber[1];
|
||
}
|
||
// 如果比例之后 高度大于h
|
||
if (h > this.h) {
|
||
h = this.h;
|
||
w = (h / this.fixedNumber[1]) * this.fixedNumber[0];
|
||
}
|
||
this.changeCrop(w, h);
|
||
},
|
||
// 手动改变截图框大小函数
|
||
changeCrop(w, h) {
|
||
if (this.centerBox) {
|
||
// 修复初始化时候在centerBox=true情况下
|
||
let axis = this.getImgAxis();
|
||
if (w > axis.x2 - axis.x1) {
|
||
// 宽度超标
|
||
w = axis.x2 - axis.x1;
|
||
h = (w / this.fixedNumber[0]) * this.fixedNumber[1];
|
||
}
|
||
if (h > axis.y2 - axis.y1) {
|
||
// 高度超标
|
||
h = axis.y2 - axis.y1;
|
||
w = (h / this.fixedNumber[1]) * this.fixedNumber[0];
|
||
}
|
||
}
|
||
// 判断是否大于容器
|
||
this.cropW = w;
|
||
this.cropH = h;
|
||
this.checkCropLimitSize()
|
||
this.$nextTick(() => {
|
||
// 居中走一走
|
||
this.cropOffsertX = (this.w - this.cropW) / 2;
|
||
this.cropOffsertY = (this.h - this.cropH) / 2;
|
||
if (this.centerBox) {
|
||
this.moveCrop(null, true);
|
||
}
|
||
});
|
||
},
|
||
// 重置函数， 恢复组件置初始状态
|
||
refresh() {
|
||
let img = this.img;
|
||
this.imgs = "";
|
||
this.scale = 1;
|
||
this.crop = false;
|
||
this.rotate = 0;
|
||
this.w = 0;
|
||
this.h = 0;
|
||
this.trueWidth = 0;
|
||
this.trueHeight = 0;
|
||
this.clearCrop();
|
||
this.$nextTick(() => {
|
||
this.checkedImg();
|
||
});
|
||
},
|
||
|
||
// 向左边旋转
|
||
rotateLeft() {
|
||
this.rotate = this.rotate <= -3 ? 0 : this.rotate - 1;
|
||
},
|
||
|
||
// 向右边旋转
|
||
rotateRight() {
|
||
this.rotate = this.rotate >= 3 ? 0 : this.rotate + 1;
|
||
},
|
||
|
||
// 清除旋转
|
||
rotateClear() {
|
||
this.rotate = 0;
|
||
},
|
||
|
||
// 图片坐标点校验
|
||
checkoutImgAxis(x, y, scale) {
|
||
x = x || this.x;
|
||
y = y || this.y;
|
||
scale = scale || this.scale;
|
||
let canGo = true;
|
||
// 开始校验 如果说缩放之后的坐标在截图框外 则阻止缩放
|
||
if (this.centerBox) {
|
||
let axis = this.getImgAxis(x, y, scale);
|
||
let cropAxis = this.getCropAxis();
|
||
// 左边的横坐标 图片不能超过截图框
|
||
if (axis.x1 >= cropAxis.x1) {
|
||
canGo = false;
|
||
}
|
||
|
||
// 右边横坐标
|
||
if (axis.x2 <= cropAxis.x2) {
|
||
canGo = false;
|
||
}
|
||
|
||
// 纵坐标上面
|
||
if (axis.y1 >= cropAxis.y1) {
|
||
canGo = false;
|
||
}
|
||
|
||
// 纵坐标下面
|
||
if (axis.y2 <= cropAxis.y2) {
|
||
canGo = false;
|
||
}
|
||
}
|
||
return canGo;
|
||
}
|
||
},
|
||
mounted() {
|
||
this.support =
|
||
"onwheel" in document.createElement("div") ?
|
||
"wheel" :
|
||
document.onmousewheel !== undefined ?
|
||
"mousewheel" :
|
||
"DOMMouseScroll";
|
||
let that = this;
|
||
var u = navigator.userAgent;
|
||
this.isIOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
|
||
// 兼容blob
|
||
if (!HTMLCanvasElement.prototype.toBlob) {
|
||
Object.defineProperty(HTMLCanvasElement.prototype, "toBlob", {
|
||
value: function(callback, type, quality) {
|
||
var binStr = atob(this.toDataURL(type, quality).split(",")[1]),
|
||
len = binStr.length,
|
||
arr = new Uint8Array(len);
|
||
for (var i = 0; i < len; i++) {
|
||
arr[i] = binStr.charCodeAt(i);
|
||
}
|
||
callback(new Blob([arr], {
|
||
type: that.type || "image/png"
|
||
}));
|
||
}
|
||
});
|
||
}
|
||
this.showPreview();
|
||
this.checkedImg();
|
||
},
|
||
destroyed() {
|
||
window.removeEventListener("mousemove", this.moveCrop);
|
||
window.removeEventListener("mouseup", this.leaveCrop);
|
||
window.removeEventListener("touchmove", this.moveCrop);
|
||
window.removeEventListener("touchend", this.leaveCrop);
|
||
this.cancelScale()
|
||
}
|
||
};
|
||
</script>
|
||
|
||
<style scoped lang="css">
|
||
.vue-cropper {
|
||
position: relative;
|
||
width: 100%;
|
||
height: 100%;
|
||
box-sizing: border-box;
|
||
user-select: none;
|
||
-webkit-user-select: none;
|
||
-moz-user-select: none;
|
||
-ms-user-select: none;
|
||
direction: ltr;
|
||
touch-action: none;
|
||
text-align: left;
|
||
background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAAA3NCSVQICAjb4U/gAAAABlBMVEXMzMz////TjRV2AAAACXBIWXMAAArrAAAK6wGCiw1aAAAAHHRFWHRTb2Z0d2FyZQBBZG9iZSBGaXJld29ya3MgQ1M26LyyjAAAABFJREFUCJlj+M/AgBVhF/0PAH6/D/HkDxOGAAAAAElFTkSuQmCC");
|
||
}
|
||
|
||
.cropper-box,
|
||
.cropper-box-canvas,
|
||
.cropper-drag-box,
|
||
.cropper-crop-box,
|
||
.cropper-face {
|
||
position: absolute;
|
||
top: 0;
|
||
right: 0;
|
||
bottom: 0;
|
||
left: 0;
|
||
user-select: none;
|
||
}
|
||
|
||
.cropper-box-canvas img {
|
||
position: relative;
|
||
text-align: left;
|
||
user-select: none;
|
||
transform: none;
|
||
max-width: none;
|
||
max-height: none;
|
||
}
|
||
|
||
.cropper-box {
|
||
overflow: hidden;
|
||
}
|
||
|
||
.cropper-move {
|
||
cursor: move;
|
||
}
|
||
|
||
.cropper-crop {
|
||
cursor: crosshair;
|
||
}
|
||
|
||
.cropper-modal {
|
||
background: rgba(0, 0, 0, 0.5);
|
||
}
|
||
|
||
.cropper-crop-box {
|
||
/*border: 2px solid #39f;*/
|
||
}
|
||
|
||
.cropper-view-box {
|
||
display: block;
|
||
overflow: hidden;
|
||
width: 100%;
|
||
height: 100%;
|
||
outline: 1px solid #39f;
|
||
outline-color: rgba(51, 153, 255, 0.75);
|
||
user-select: none;
|
||
}
|
||
|
||
.cropper-view-box img {
|
||
user-select: none;
|
||
text-align: left;
|
||
max-width: none;
|
||
max-height: none;
|
||
}
|
||
|
||
.cropper-face {
|
||
top: 0;
|
||
left: 0;
|
||
background-color: #fff;
|
||
opacity: 0.1;
|
||
}
|
||
|
||
.crop-info {
|
||
position: absolute;
|
||
left: 0px;
|
||
min-width: 65px;
|
||
text-align: center;
|
||
color: white;
|
||
line-height: 20px;
|
||
background-color: rgba(0, 0, 0, 0.8);
|
||
font-size: 12px;
|
||
}
|
||
|
||
.crop-line {
|
||
position: absolute;
|
||
display: block;
|
||
width: 100%;
|
||
height: 100%;
|
||
opacity: 0.1;
|
||
}
|
||
|
||
.line-w {
|
||
top: -3px;
|
||
left: 0;
|
||
height: 5px;
|
||
cursor: n-resize;
|
||
}
|
||
|
||
.line-a {
|
||
top: 0;
|
||
left: -3px;
|
||
width: 5px;
|
||
cursor: w-resize;
|
||
}
|
||
|
||
.line-s {
|
||
bottom: -3px;
|
||
left: 0;
|
||
height: 5px;
|
||
cursor: s-resize;
|
||
}
|
||
|
||
.line-d {
|
||
top: 0;
|
||
right: -3px;
|
||
width: 5px;
|
||
cursor: e-resize;
|
||
}
|
||
|
||
.crop-point {
|
||
position: absolute;
|
||
width: 8px;
|
||
height: 8px;
|
||
opacity: 0.75;
|
||
background-color: #39f;
|
||
border-radius: 100%;
|
||
}
|
||
|
||
.point1 {
|
||
top: -4px;
|
||
left: -4px;
|
||
cursor: nw-resize;
|
||
}
|
||
|
||
.point2 {
|
||
top: -5px;
|
||
left: 50%;
|
||
margin-left: -3px;
|
||
cursor: n-resize;
|
||
}
|
||
|
||
.point3 {
|
||
top: -4px;
|
||
right: -4px;
|
||
cursor: ne-resize;
|
||
}
|
||
|
||
.point4 {
|
||
top: 50%;
|
||
left: -4px;
|
||
margin-top: -3px;
|
||
cursor: w-resize;
|
||
}
|
||
|
||
.point5 {
|
||
top: 50%;
|
||
right: -4px;
|
||
margin-top: -3px;
|
||
cursor: e-resize;
|
||
}
|
||
|
||
.point6 {
|
||
bottom: -5px;
|
||
left: -4px;
|
||
cursor: sw-resize;
|
||
}
|
||
|
||
.point7 {
|
||
bottom: -5px;
|
||
left: 50%;
|
||
margin-left: -3px;
|
||
cursor: s-resize;
|
||
}
|
||
|
||
.point8 {
|
||
bottom: -5px;
|
||
right: -4px;
|
||
cursor: se-resize;
|
||
}
|
||
|
||
@media screen and (max-width: 500px) {
|
||
.crop-point {
|
||
position: absolute;
|
||
width: 20px;
|
||
height: 20px;
|
||
opacity: 0.45;
|
||
background-color: #39f;
|
||
border-radius: 100%;
|
||
}
|
||
|
||
.point1 {
|
||
top: -10px;
|
||
left: -10px;
|
||
}
|
||
|
||
.point2,
|
||
.point4,
|
||
.point5,
|
||
.point7 {
|
||
display: none;
|
||
}
|
||
|
||
.point3 {
|
||
top: -10px;
|
||
right: -10px;
|
||
}
|
||
|
||
.point4 {
|
||
top: 0;
|
||
left: 0;
|
||
}
|
||
|
||
.point6 {
|
||
bottom: -10px;
|
||
left: -10px;
|
||
}
|
||
|
||
.point8 {
|
||
bottom: -10px;
|
||
right: -10px;
|
||
}
|
||
}
|
||
</style>
|