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liujingshou

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ferryshaobo

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2Â¥2016-08-19 12:58:05
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FMStation

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CODE:
<!DOCTYPE html>
<html lang="en">
<head>
        <meta charset="utf-8" />
        <title>Colorpicker demo</title>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
</head>
<body>
<canvas width="600" height="440" id="canvas_picker"></canvas>
<div id="hex">HEX: <input type="text"></input></div>
<div id="rgb">RGB: <input type="text"></input></div>
<script type="text/">
        var canvas = document.getElementById('canvas_picker').getContext('2d');

        // create an image object and get it¡¯s source
        var img = new Image();
        img.src = 'image.jpg';

        // copy the image to the canvas
        $(img).load(function(){
          canvas.drawImage(img,0,0);
        });

        // http://www.er.net/faq/rgbtohex.htm
        function rgbToHex(R,G,B) {return toHex(R)+toHex(G)+toHex(B)}
        function toHex(n) {
          n = parseInt(n,10);
          if (isNaN(n)) return "00";
          n = Math.max(0,Math.min(n,255));
          return "0123456789ABCDEF".charAt((n-n%16)/16)  + "0123456789ABCDEF".charAt(n%16);
        }
        $('#canvas_picker').click(function(event){
          // getting user coordinates
          var x = event.pageX - this.offsetLeft;
          var y = event.pageY - this.offsetTop;
          // getting image data and RGB values
          var img_data = canvas.getImageData(x, y, 1, 1).data;
          var R = img_data[0];
          var G = img_data[1];
          var B = img_data[2];  var rgb = R + ',' + G + ',' + B;
          // convert RGB to HEX
          var hex = rgbToHex(R,G,B);
          // making the color the value of the input
          $('#rgb input').val(rgb);
          $('#hex input').val('#' + hex);
        });
</script>

</body>
</html>

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

3Â¥2016-08-19 19:25:36
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liujingshou

½ð³æ (ÕýʽдÊÖ)

Ëͺ컨һ¶ä
ÒýÓûØÌû:
3Â¥: Originally posted by FMStation at 2016-08-19 19:25:36
<!DOCTYPE html>
<html lang="en">
<head>
        <meta charset="utf-8" />
        <title>Colorpicker demo</title>
        <script src="http://ajax.goo ...

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·¢×ÔСľ³æAndroid¿Í»§¶Ë
4Â¥2016-08-20 05:57:12
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lishouyin

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

5Â¥2016-08-20 21:57:19
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