vue.js3:色调色相调整并保存(vue@3.2.37)

一，js代码:

<template>
  <div style="position:relative;">
    <div style="width: 700px;margin: auto;">
  <h1>色调/色相 调整</h1>
    <div><input type="file" accept="image/*" @change="open" />
      <button @click="reset">重置</button>
    </div>
      <div style="display: flex;"><span style="width:40px;">色相</span>
<el-slider style="width:640px;" v-model="valuesx" :min="-100" :max="100"  show-input /></div>
  <div style="display: flex;margin-top: 5px;"><span style="width:40px;">青</span>
<el-slider style="width:640px;" v-model="valueqh" :min="0" :max="200"  show-input />红</div>
  <div style="display: flex;margin-top: 5px;"><span style="width:40px;">紫</span>
<el-slider style="width:640px;" v-model="valuezl" :min="0" :max="200"  show-input />绿</div>
  <div style="display: flex;margin-top: 5px;"><span style="width:40px;">黄</span>
<el-slider style="width:640px;" v-model="valuehl" :min="0" :max="200"  show-input />蓝</div>

      <svg id="mysvg" :width="imgDispWidth" :height="imgDispHeight"
           style="background: rgba(255, 255, 255, 0); border-radius: 0px; transform: scale(1, 1);  filter: saturate(1) brightness(1);">
        <defs>
          <filter id="f3">
            <feColorMatrix in="SourceGraphic" type="hueRotate" :values="hueMatrix"></feColorMatrix>
            <feColorMatrix type="matrix" :values="colorMatrix"></feColorMatrix>
          </filter>
        </defs>
        <image id="img" :xlink:href="imgSrc" filter="url(#f3)" :width="imgDispWidth" :height="imgDispHeight" />
      </svg>

    <div style="margin-top: 10px;"><button @click="save">保存</button></div>
  <div>
  </div>

    </div>
  </div>
</template>

<script>
import {computed, ref} from "vue";

export default {
  name: "ColorImg",
  setup() {
    //青红色的值
    const valueqh = ref(100);
    //紫绿色的值
    const valuezl = ref(100);
    //黄蓝色的值
    const valuehl = ref(100);
    //色相色的值
    const valuesx = ref(0);
    //颜色matrix
    const colorMatrix = computed( ()=> {
          let qh = valueqh.value * 0.01;
          let zl = valuezl.value * 0.01;
          let hl = valuehl.value * 0.01;

          let str = qh+" 0 0 0 0 0 "+zl+" 0 0 0 0 0 "+hl+" 0 0 0 0 0 1 0";
          return str;
        }
    );
    //色相matrix
    const hueMatrix = computed( ()=> {
          return valuesx.value;
        }
    );

    //保存修改
    const save = () => {
      var str = document.getElementById("mysvg")
      let serializer = new XMLSerializer()
      var source = serializer.serializeToString(str);
      source = '<?xml version = "1.0" standalone = "no"?>\r\n' + source;
      var url = "data:image/svg+xml;charset=utf-8," + encodeURIComponent(source);

      var canvas = document.createElement("canvas")
      canvas.width = imgWidth.value;
      canvas.height = imgHeight.value;
      var context = canvas.getContext("2d");

      var image = new Image;
      image.src = url;
      image.crossOrigin = '';
      image.onload = function () {
        context.drawImage(image, 0, 0,imgWidth.value,imgHeight.value);
        downJpgByCanvas(canvas);
      }
    }

    //下载图片
    const downJpgByCanvas = (canvas) => {
      var oA = document.createElement("a");
      let time = timeFormat();
      oA.download = "img_"+time+'.jpg';// 设置下载的文件名，默认是'下载'
      oA.href = canvas.toDataURL("image/jpeg");
      document.body.appendChild(oA);
      oA.click();
      oA.remove(); // 下载之后把创建的元素删除
    }

    //重置
    const reset = () => {
      valueqh.value = 100;
      valuezl.value = 100;
      valuehl.value = 100;
      valuesx.value = 0;
    };

    //补0
    const add0 = (m) => {
      return m<10?'0'+m:m
    }
    //格式化时间
    const timeFormat = ()=>{
      var time = new Date();
      var y = time.getFullYear();
      var m = time.getMonth()+1;
      var d = time.getDate();
      var h = time.getHours();
      var mm = time.getMinutes();
      var s = time.getSeconds();
      let res = y+add0(m)+add0(d)+add0(h)+add0(mm)+add0(s);
      return res;
    }

    //图片的src
    const imgSrc = ref("");
    //图片的原宽高
    const imgWidth = ref(0);
    const imgHeight = ref(0);
    //图片的显示宽高
    const imgDispWidth = ref(0);
    const imgDispHeight = ref(0);

    //读取图片的信息
    const open = (e) => {
      let file = e.target.files[0];
      let reader = new FileReader();
      reader.readAsDataURL(file);
      //文件加载成功
      reader.onload = () =>{
        //重置
        reset();
        //显示图片
        imgSrc.value = reader.result;
        //得到宽高
        let img = new Image();
        img.src= reader.result;
        img.onload = () => {
          //保存原始宽高
          imgWidth.value = img.width;
          imgHeight.value = img.height;

          if (img.width >= img.height) {
            imgDispWidth.value = 700;
            imgDispHeight.value = (700 * img.height) / img.width;
          } else {
            imgDispHeight.value = 600;
            imgDispWidth.value = (600 * img.width) / img.height;
          }
        }
      }
    }

    return {
      valueqh,
      valuezl,
      valuehl,
      valuesx,
      colorMatrix,
      hueMatrix,


      save,
      open,
      imgSrc,
      imgWidth,
      imgHeight,
      imgDispWidth,
      imgDispHeight,
      reset,
    }
  }
}
</script>

<style scoped>

</style>

说明：刘宏缔的架构森林是一个专注架构的博客，

网站：https://blog.imgtouch.com
本文: https://blog.imgtouch.com/index.php/2023/06/02/vue-js3-se-tiao-se-xiang-tiao-zheng-bing-bao-cun-vue-3-2-37/

         对应的源码可以访问这里获取： https://github.com/liuhongdi/
         或: https://gitee.com/liuhongdi

说明：作者:刘宏缔 邮箱: 371125307@qq.com

二，测试效果

 

调整时的效果

  

三，查看vue框架的版本:

liuhongdi@lhdpc:/data/vue/pdf/image2pdf$ npm list vue
image2pdf@0.1.0 /data/vue/pdf/image2pdf
├─┬ @vue/cli-plugin-babel@5.0.8
│ └─┬ @vue/babel-preset-app@5.0.8
│   ├─┬ @vue/babel-preset-jsx@1.3.0
│   │ └── vue@3.2.37 deduped invalid: "2.x" from node_modules/@vue/babel-preset-jsx
│   └── vue@3.2.37 deduped
└─┬ vue@3.2.37
  └─┬ @vue/server-renderer@3.2.37
    └── vue@3.2.37 deduped