167 lines
6.8 KiB
HTML
167 lines
6.8 KiB
HTML
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<script type="text/html" data-template-name="annotate-image">
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<div class="form-row">
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<span id="node-input-row-stroke">
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<label for="node-input-stroke">Line Color</label>
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</span>
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<label style="margin-left: 20px" for="node-input-lineWidth">Line Width</label>
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<input style="width: 50px" type="text" id="node-input-lineWidth">
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</div>
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<div class="form-row">
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<span id="node-input-row-fontColor">
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<label for="node-input-fontColor">Font Color</label>
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</span>
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<label style="margin-left: 20px" for="node-input-fontSize">Font Size</label>
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<input style="width: 50px" type="text" id="node-input-fontSize">
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</div>
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<div class="form-row">
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<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
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</div>
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</script>
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<script type="text/html" data-help-name="annotate-image">
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<p>A node that can annotate JPEG images with simple shapes and labels.</p>
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<h3>Inputs</h3>
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<dl class="message-properties">
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<dt>payload<span class="property-type">Buffer</span></dt>
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<dd>A Buffer containing a JPEG image. Support for PNG will come soon.</dd>
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<dt>annotations<span class="property-type">Array</span></dt>
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<dd>An array of annotations to apply to the image. See below for details
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of the annotation format.</dd>
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</dl>
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<h3>Outputs</h3>
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<dl class="message-properties">
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<dt>payload<span class="property-type">Buffer</span></dt>
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<dd>The image with any annotations applied.</dd>
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</dl>
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<h3>Details</h3>
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<p>The annotations provided in <code>msg.annotations</code> are applied in order.
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Each annotation is an object with the following properties:</p>
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<dl class="message-properties">
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<dt>type<span class="property-type">string</span></dt>
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<dd><ul>
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<li><code>"rect"</code> - draws a rectangle</li>
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<li><code>"circle"</code> - draws a circle</li>
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</dd>
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<dt>x,y <span class="property-type">number</span></dt>
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<dd>The top-left corner of a <code>rect</code> annotation, or the center of a <code>circle</code> annotation.</dd>
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<dt>w,h <span class="property-type">number</span></dt>
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<dd>The width and height of a <code>rect</code> annotation.</dd>
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<dt>r <span class="property-type">number</span></dt>
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<dd>The radius of a <code>circle</code> annotation.</dd>
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<dt>bbox <span class="property-type">array</span></dt>
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<dd>This can be used instead of <code>x</code>,<code>y</code>,<code>w</code>,<code>h</code> and <code>r</code>. It should
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be an array of four values giving the bounding box of the annotation: <code>[x, y, w, h]</code>.<br>
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If this property is set and <code>type</code> is not set, it will default to <code>rect</code>.</dd>
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<dt>label <span class="property-type">string</span></dt>
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<dd>An optional piece of text to label the annotation with</dd>
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<dt>stroke <span class="property-type">string</span></dt>
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<dd>The line color of the annotation. Default: <code>"#ffC000"</code></dd>
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<dt>lineWidth <span class="property-type">number</span></dt>
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<dd>The stroke width used to draw the annotation. Default: <code>5</code></dd>
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<dt>fontSize <span class="property-type">number</span></dt>
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<dd>The font size to use for the label. Default: <code>24</code></dd>
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<dt>fontColor <span class="property-type">string</span></dt>
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<dd>The color of the font to use for the label. Default: <code>"#ffC000"</code></dd>
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<dt>labelLocation <span class="property-type">string</span></dt>
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<dd>The location to place the label. Can be set to <code>top</code> or <code>bottom</code>.
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Default: <code>"automatic"</code>.</dd>
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</dl>
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<h3>Examples</h3>
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<pre> msg.annotations = [ {
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type: "rect",
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x: 10, y: 10, w: 50, h: 50,
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label: "hello"
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}]</pre>
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<pre> msg.annotations = [ {
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type: "circle",
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x: 50, y: 50, r: 20
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}]</pre>
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<pre> msg.annotations = [ {
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type: "rect",
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bbox: [ 10, 10, 50, 50]
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}]</pre>
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</script>
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<script type="text/javascript">
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(function() {
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// Lifted from @node-red/editor-client/.../group.js
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// Need to make this a default built-in palette so we don't have to copy
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// it around.
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var colorPalette = [
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"#ff0000",
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"#ffC000",
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"#ffff00",
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"#92d04f",
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"#0070c0",
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"#001f60",
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"#6f2fa0",
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"#000000",
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"#777777"
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]
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var colorSteps = 3;
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var colorCount = colorPalette.length;
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for (var i=0,len=colorPalette.length*colorSteps;i<len;i++) {
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var ci = i%colorCount;
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var j = Math.floor(i/colorCount)+1;
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var c = colorPalette[ci];
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var r = parseInt(c.substring(1, 3), 16);
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var g = parseInt(c.substring(3, 5), 16);
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var b = parseInt(c.substring(5, 7), 16);
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var dr = (255-r)/(colorSteps+((ci===colorCount-1) ?0:1));
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var dg = (255-g)/(colorSteps+((ci===colorCount-1) ?0:1));
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var db = (255-b)/(colorSteps+((ci===colorCount-1) ?0:1));
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r = Math.min(255,Math.floor(r+j*dr));
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g = Math.min(255,Math.floor(g+j*dg));
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b = Math.min(255,Math.floor(b+j*db));
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var s = ((r<<16) + (g<<8) + b).toString(16);
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colorPalette.push('#'+'000000'.slice(0, 6-s.length)+s);
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}
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RED.nodes.registerType('annotate-image',{
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category: 'utility',
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color:"#f1c2f0",
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defaults: {
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name: {value:""},
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fill: {value:""},
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stroke: {value:"#ffC000"},
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lineWidth: {value:5},
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fontSize: {value: 24},
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fontColor: {value: "#ffC000"}
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},
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inputs:1,
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outputs:1,
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icon: "font-awesome/fa-object-group",
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label: function() {
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return this.name||"annotate image";
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},
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labelStyle: function() {
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return this.name?"node_label_italic":"";
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},
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oneditprepare: function() {
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RED.colorPicker.create({
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id:"node-input-stroke",
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value: this.stroke || "#ffC000",
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palette: colorPalette,
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cellPerRow: colorCount,
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cellWidth: 16,
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cellHeight: 16,
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cellMargin: 3
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}).appendTo("#node-input-row-stroke");
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RED.colorPicker.create({
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id:"node-input-fontColor",
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value: this.fontColor || "#ffC000",
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palette: colorPalette,
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cellPerRow: colorCount,
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cellWidth: 16,
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cellHeight: 16,
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cellMargin: 3
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}).appendTo("#node-input-row-fontColor");
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}
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});
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})();
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</script>
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