주석 코드와 데모 : http://jsfiddle.net/m1erickson/asT8x/
// clear the canvas
ctx.clearRect(0,0,canvas.width,canvas.height);
// save the context state
ctx.save();
// translate to the coordinate point you wish to zoom in on
ctx.translate(mouseX,mouseY);
// scale the canvas to the desired zoom level
ctx.scale(scale,scale);
// draw the image with an offset of -mouseX,-mouseY
// (offset to center image at the selected zoom point);
ctx.drawImage(img,-mouseX,-mouseY);
// restore the context to its untranslated/unrotated state
ctx.restore();
좋아요 매우 ynice 그러나 나는 확대와 위치를 변경하려면이 예는 변화의 시작 위치를 위해 노력 – user3797449