9
在mousemove上从画布获取像素颜色
是否可以在鼠标下获取RGB值像素？有完整的例子吗？这是我到目前为止的内容： function draw() { var ctx = document.getElementById('canvas').getContext('2d'); var img = new Image(); img.src = 'Your URL'; img.onload = function(){ ctx.drawImage(img,0,0); }; canvas.onmousemove = function(e) { var mouseX, mouseY; if(e.offsetX) { mouseX = e.offsetX; mouseY = e.offsetY; } else if(e.layerX) { mouseX = e.layerX; mouseY = e.layerY; } var c …