图片旋转倾斜后输出
旋转不修改imageData，只是通过计算位置来达到同样的效果，处理速度快啊
1:1输出 StaticCanvas {{ Math.round(outC.canvas.width) + 'x' + Math.round(outC.canvas.height) + '缩放比例：'+ outC.canvas.getZoom()*100 +'%' }}
1:1输出 StaticCanvas {{ Math.round(outC.canvas.width) + 'x' + Math.round(outC.canvas.height) + '缩放比例：'+ outC.canvas.getZoom()*100 +'%' }}