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Added "png" to render option #95

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Added "png" to render option #95

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1223982
Added "png" to render option
ginlime May 4, 2017
93c7ad8
Added some goodies
ginlime Apr 5, 2018
4ac7443
Replaced with latest qrcode.js
ginlime Apr 5, 2018
2dae815
Updated to adapt to change of qrcode.js
ginlime Apr 5, 2018
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56 changes: 41 additions & 15 deletions src/jquery.qrcode.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
(function( $ ){
$.fn.qrcode = function(options) {
// base number for auto padding
var paddingBase = 4;
// if options is string,
if( typeof options === 'string' ){
options = { text: options };
Expand All @@ -8,18 +10,19 @@
// set default values
// typeNumber < 1 for automatic calculation
options = $.extend( {}, {
render : "canvas",
render : "canvas", // canvas, table, png
width : 256,
height : 256,
padding : "auto", // numeric or auto ("auto" adds 4 cells for padding around each)
typeNumber : -1,
correctLevel : QRErrorCorrectLevel.H,
correctLevel : QRCode.CorrectLevel.H,
background : "#ffffff",
foreground : "#000000"
}, options);

var createCanvas = function(){
// create the qrcode itself
var qrcode = new QRCode(options.typeNumber, options.correctLevel);
var qrcode = new QRCode.QRCodeModel(options.typeNumber, options.correctLevel);
qrcode.addData(options.text);
qrcode.make();

Expand All @@ -30,16 +33,23 @@
var ctx = canvas.getContext('2d');

// compute tileW/tileH based on options.width/options.height
var tileW = options.width / qrcode.getModuleCount();
var tileH = options.height / qrcode.getModuleCount();
var moduleCount = qrcode.getModuleCount();
var tileW = (options.padding == "auto") ? options.width / (moduleCount+paddingBase*2) : (options.width - options.padding*2) / moduleCount;
var tileH = (options.padding == "auto") ? options.height / (moduleCount+paddingBase*2) : (options.height - options.padding*2) / moduleCount;

// draw in the canvas
for( var row = 0; row < qrcode.getModuleCount(); row++ ){
for( var col = 0; col < qrcode.getModuleCount(); col++ ){
// filling base
ctx.fillStyle = options.background;
ctx.fillRect(0,0,options.width,options.height);
// start position
var startLeft = (options.padding == "auto") ? Math.round(tileW*paddingBase) : options.padding;
var startTop = (options.padding == "auto") ? Math.round(tileH*paddingBase) : options.padding;
for( var row = 0; row < moduleCount; row++ ){
for( var col = 0; col < moduleCount; col++ ){
ctx.fillStyle = qrcode.isDark(row, col) ? options.foreground : options.background;
var w = (Math.ceil((col+1)*tileW) - Math.floor(col*tileW));
var h = (Math.ceil((row+1)*tileW) - Math.floor(row*tileW));
ctx.fillRect(Math.round(col*tileW),Math.round(row*tileH), w, h);
ctx.fillRect(Math.round(col*tileW)+startLeft,Math.round(row*tileH)+startTop, w, h);
}
}
// return just built canvas
Expand All @@ -62,28 +72,44 @@
.css('background-color', options.background);

// compute tileS percentage
var tileW = options.width / qrcode.getModuleCount();
var tileH = options.height / qrcode.getModuleCount();
var moduleCount = qrcode.getModuleCount();
var tileW = (options.padding == "auto") ? options.width / (moduleCount+paddingBase*2) : (options.width - options.padding*2) / moduleCount;
var tileH = (options.padding == "auto") ? options.height / (moduleCount+paddingBase*2) : (options.height - options.padding*2) / moduleCount;

// draw in the table
for(var row = 0; row < qrcode.getModuleCount(); row++ ){
for(var row = 0; row < moduleCount; row++ ){
var $row = $('<tr></tr>').css('height', tileH+"px").appendTo($table);

for(var col = 0; col < qrcode.getModuleCount(); col++ ){
for(var col = 0; col < moduleCount; col++ ){
$('<td></td>')
.css('width', tileW+"px")
.css('background-color', qrcode.isDark(row, col) ? options.foreground : options.background)
.appendTo($row);
}
}
if(options.padding){
var paddingWidth = (options.padding == "auto") ? tileW*paddingBase : options.padding;
var paddingCell = $('<td></td>').css('width', paddingWidth+"px").css('background-color',options.background);
$row.prepend(paddingCell).append(paddingCell);
}
}
if(options.padding){
var paddingRow = $('<tr></tr>').css('height', tileH+"px").append($('<td></td>').attr('colspan',moduleCount+2).css('background-color',options.background));
$table.prepend(paddingRow).append(paddingRow);
}
// return just built canvas
return $table;
}


return this.each(function(){
var element = options.render == "canvas" ? createCanvas() : createTable();
$(element).appendTo(this);
var element = (options.render == "canvas" || options.render == "png") ? createCanvas() : createTable();
if(options.render == "png"){
var png = element.toDataURL();
$('<img>').attr('src',png).appendTo(this);
} else {
$(element).appendTo(this);
}
$(this).trigger('renderend');
});
};
})( jQuery );
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