卷积计算器，计算x(n)=1(0<=n<=N1),y(n)=0.5*n(0<=n<=N2)相卷积的结果，其中两者长度可调，并绘制出图像，计算最大值-Paint a convolution picture and find out the maximum value.

jna调用dll文件 回调方法怎么书写，与bmp_swt相结合-jna dll file called how to write the callback method, combined with bmp_swt