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var glob = require('glob');
var Canvas = require('canvas');
var echarts = require('echarts');
var fs = require('fs');
var path = require('path');
require('echarts/map/js/china');
var options = {
bar: require('./option/bar'),
area: require('./option/area'),
scatter: require('./option/scatter'),
pie: require('./option/pie'),
graph: require('./option/graph'),
map: require('./option/map')
};
var WIDTH = 600;
var HEIGHT = 400;
echarts.setCanvasCreator(function () {
return createCanvas();
});
var font = new Canvas.Font('Helvetica', '/System/Library/Fonts/Helvetica.dfont');
font.addFace('/System/Library/Fonts/Helvetica.dfont', 'bolder');
glob('../*.js', function (err, themePathList) {
themePathList.forEach(function (themePath) {
var themeName = path.basename(themePath, '.js');
var canvasList = [];
require(themePath);
echarts.util.each(options, function (option) {
var canvas = createCanvas();
var chart = echarts.init(canvas, themeName);
var optionNeedFix = option;
if (option.options) {
optionNeedFix = option.options[0];
}
canvasList.push(canvas);
optionNeedFix.animation = false;
optionNeedFix.textStyle = {
fontFamily: 'Helvetica',
fontSize: 12
};
chart.setOption(option);
chart.dispose();
});
var columnCount = 2;
var outputCanvas = new Canvas(WIDTH * columnCount, HEIGHT * canvasList.length / columnCount);
var outputCtx = outputCanvas.getContext('2d');
canvasList.forEach(function (canvas, idx) {
outputCtx.drawImage(canvas, idx % columnCount * WIDTH, Math.floor(idx / columnCount) * HEIGHT, WIDTH, HEIGHT);
});
fs.writeFileSync('../thumb/' + themeName + '.png', outputCanvas.toBuffer());
});
});
function createCanvas() {
var canvas = new Canvas(WIDTH, HEIGHT);
var ctx = canvas.getContext('2d');
ctx.addFont(font);
return canvas;
}