context.drawImage(imageObj,destX,destY);
//为某个画布贴上图片
例子：
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window.onload =
function
(){
var
canvas = document.getElementById(
"myCanvas"
);
var
context = canvas.getContext(
"2d"
);
var
destX = 69;
var
destY = 50;
var
imageObj =
new
Image();
imageObj.onload =
function
(){
context.drawImage(imageObj, destX, destY);
};
imageObj.src =
"darth-vader.jpg"
;
};
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context.drawImage(imageObj,destX,destY,destWidth,destHeight);
//同上，在某个矩形框内显示图片，原始图片等比缩放
context.drawImage(imageObj, sourceX, sourceY, sourceWidth, sourceHeight, destX, destY, destWidth, destHeight);
//截取原始图片的一个部分在矩形框内显示
context.font=[value];
//文字字体，例子：
context.font = "40pt Calibri";
context.fillStyle=[value];
//文字颜色
context.strokeStyle=[value];
context.strokeText("Hello World!", x, y);
//文字样式
context.textAlign=[value];
//文字显示在左边，中间还是右边
context.textBaseline=[value];
//文字显示在上面，中间还是下面（top, hanging, middle, alphabetic,ideographic, and bottom）
context.shadowOffsetX=[value];
context.shadowOffsetY=[value];
//增加阴影
context.globalAlpha=[value];
//设置透明度，从0到1
