Canvasの図形、画像の伸縮(scale)
canvas = document.getElementById('canvas'); ctx = canvas.getContext('2d'); //横と縦の伸縮の比率を指定 ctx.scale(0.5, 0.8); var curImage = new Image(); curImage.src = 'http://praiation.shiriagari.com/javascript_samples/0004/2-2/test.jpg'; curImage.onload = function(){ ctx.drawImage(curImage, 0,0,400,300); }