{% extends 'index.html' %}
{% block content %}
    <!-- Sales Chart Start -->
    <div class="container-fluid pt-4 px-4">
        <div class="row g-4">
            <div class="col-sm-12 col-xl-6" style="width: 100%">
                <div class="bg-secondary text-center rounded p-4">
                    <form method="post" enctype="multipart/form-data">
                        {% csrf_token %}
                        <div class="d-flex align-items-center justify-content-between mb-4">
                            <h6 class="mb-0">图像预览</h6>
                            <button type="submit" class="btn btn-outline-warning m-2">点击开始转换</button>
                        </div>
                        <div>
                            <label for="formFileLg" class="form-label">请上传一张图像来进行</label>
                            <div style="font-weight: bold;font-size: 20px;margin-bottom: 20px">使用canny算子实现图像腐蚀操作</div>
                            <input class="form-control form-control-lg bg-dark" name="img" id="imgOne"
                                   onchange="preImg(this.id,'photo');" type="file">
                            <br>

                            <img id="photo" src="" class="border border-info" width="100%" style="display: block;"/>
                        </div>
                    </form>
                </div>
            </div>
            <div class="col-sm-12 col-xl-6" style="width: 100%">
                <div class="bg-secondary text-center rounded p-4">
                    <div class="d-flex align-items-center justify-content-between mb-4">
                        <h6 class="mb-0">输出图像</h6>
                        <a href="">保存</a>
                    </div>
                    {% if edge_output %}
                        <div>输出图像</div>
                        <img src="data:image/jpg;base64,{{edge_output }}" class="border border-info mb-2" >
                    {% else %}
                        <div style="width: 100%;height: 188px;display: flex;align-content: center;align-items: center;justify-items: center;justify-content: center">
                        <div>暂时还未有输出图片</div>
                        </div>
                    {% endif %}

                </div>
            </div>
        </div>
    </div>
    <!-- Sales Chart End -->


{% endblock %}
{% block js %}
    <script type="text/javascript">
        function getFileUrl(sourceId) {
            var url;
            if (navigator.userAgent.indexOf("MSIE") >= 1) { // IE
                url = document.getElementById(sourceId).value;
            } else if (navigator.userAgent.indexOf("Firefox") > 0) { // Firefox
                url = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0));
            } else if (navigator.userAgent.indexOf("Chrome") > 0) { // Chrome
                url = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0));
            }
            return url;
        }

        function preImg(sourceId, targetId) {
            var url = getFileUrl(sourceId);
            var imgPre = document.getElementById(targetId);
            imgPre.src = url;
        }
    </script>
    <script>

    </script>

{% endblock %}